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&l;div&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;引言&l;/li&g; &l;/ul&g; &l;p&g;滚动轴承是工程机械设备中常用重要机件，各种因素导致的损害会在轴承上留下不同的特征。通过检查分析损坏的轴承，找出其损坏的原因并采取必要的改善措施，防止不利因素的发生，是非常有意义的。即使有时没有找出失效的真实原因，也能得出一些方向性的提示，排除一些错误的观点和避免一些不必要的弯路。&l;/p&g; &l;p&g;&l;song&g;1 &l;/song&g;滚动轴承运转轨迹模式&l;/p&g; &l;p&g;    滚动轴承在低负荷下运转时，内、外圈滚道接触面会有一些钝化痕迹，通常这不算磨损，对轴承寿命影响不大。钝化痕迹形成的部位及大小即所谓的轨迹模式，因转动与滚动情况不同而各异，一般可以通过对轨迹模式的检测来掌握轴承的运行环境，区分其运行环境是否正常和适当。&l;/p&g; &l;p&g;&l;song&g;2&l;/song&g; 失效分类及实例&l;/p&g; &l;p&g;轴承失效的典型损坏形式一般是由初期阶段延续上升到第二阶段，即由压痕、擦痕、刮伤、电击、锈迹、过热等上升至凹痕、磨损、瘢痕、腐蚀、疲劳、剥落、失圆、烧伤、断裂、内部间隙增大、振动和噪声上升，直至失效，而轴承失效通常表现为各阶段损坏的混合，以下为常见的失效形式和不适当运行方式。&l;/p&g; &l;p&g;2.1 疲劳&l;/p&g; &l;p&g;疲劳是载荷所产生的剪切应力在金属承载表面以下快速周期性的出现，经过一定时间后产生微观裂纹，并逐渐延伸到金属表面引起的剥离或脱落，并逐渐扩展最终使轴承失效。它与因润滑不足、粗糙表面及微观凹凸在周期载荷作用下滚道表面形成的微小裂纹不同，表面裂纹（或表面疲劳）非常细微，但逐渐扩展会缩短轴承使用寿命。&l;/p&g; &l;p&g;2.2 磨损&l;/p&g; &l;/div&g; &l;p&g; &l;/p&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.2.1 润滑原因&l;/p&g; &l;p&g;当润滑油型号不对、变质、流失、润滑不充分或润滑失效，无法形成有承载力的油膜，金属之间直接接触，相对滑动，表面材料原始微观刀纹被磨掉，起初出现明显的碾压光亮镜面效果。当润滑油耗尽，干摩擦使温度急剧上升，发蓝直至呈棕色，温度继续升高，金属表面变软，发生流动和粘连，表面材料发生相互转移的拖尾效应，呈泪痕状。摩擦发生时，某些材料的表面也可能会被加热后又经油淋快速冷却而局部硬化，造成滚动中局部应力集中和其它材料的加速磨损。&l;/p&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.2.2 污染原因&l;/p&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;因装配操作不当，密封性差，维护不良，杂质或轴承材料磨屑进入等，轴承工作面会被&l;/p&g; &l;p&g;逐渐磨损直至不能使用。&l;/p&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.2.3 振动原因&l;/p&g; &l;p&g;  轴承静止时，滚子与滚道间还未形成润滑膜，相互接触的金属之间受振动环境影响产生相对移动摩擦，有时会产生搓板条纹状印痕，微小颗粒从滚道表面剥离形成印痕，滚柱轴承产生长条凹槽，滚珠轴承产生&l;/p&g; &l;div&g; &l;p&g;球状凹坑。大多情况剥离部位会氧化使印痕底部有暗红色锈迹，而滚子没有明显的损害。振动幅度的大小、持续的时间和间隙的大小都影响损害的程度，但振频与损害程度无显著关系。圆柱滚子轴承相对更易受到伤害，因为滚珠能在任何方向滚动，而滚柱只能朝一个方向滚动，其他方向则形成滑动。所以，提供振动阻尼基座、采用油浴润滑、轴承预加弹性载荷，或可能情况下采用球面滚子代替圆柱滚子等，尽量避免振动损害。&l;/p&g; &l;p&g;2.2.4 进出载荷区&l;/p&g; &l;p&g;滚动轴承运转时，载荷区的滚子受到内、外圈的压力驱动处于滚动状态，而无载荷区域的滚子并未完全形成滚动，当这部分滚子处于正在进入与尚未进入载荷时刻，处于刚性体与塑性体、滑动和滚动的混合状态，受加速、压力失圆和剧烈的搓挤，此刻若润滑油膜失效，会导致滚子和内外滚道磨损。&l;/p&g; &l;/div&g; &l;p&g; &l;/p&g; &l;div&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.2.5 安装原因&l;/p&g; &l;/div&g; &l;p&g; &l;/p&g; &l;p&g;安装圆柱滚子轴承时，滚子与保持架相连的环应加以润滑和旋转进行安装，否则滚子容易刮擦滚道，导致与滚子间距一致的横向擦痕。批量装配轴承时若采用合理的工装会非常方便。若轴承内圈与轴、外圈与轴承座配合不够紧，此种情况靠轴向压紧难以改善，运行时产生相对运动（跑套），在轴和轴承孔、轴承外表面和轴承座孔会产生磨损。&l;/p&g; &l;psyle=&quo;magin-lef:17.9500p;&quo;&g;2.2.6 轴承结构&l;/p&g; &l;p&g;轴承挡边、角环及保持架等都容易在运行中发生摩擦，双列球面滚子轴承的中隔圈在尺寸设计上过于靠近保持架容易磨损；双支撑轴承跨度较大时，常因热膨胀释放受阻，受过大的单向轴向载荷导致滚子端部与挡边和角环的导向面发生磨损。&l;/p&g; &l;p&g;2.2.7 轴承质量原因&l;/p&g; &l;p&g;不具备资质的制造厂家所生产的轴承，结构设计不合理、材料选用不当、制造上的缺陷、质量控制不善、工艺执行不严及运输保管失误等，均可能引起轴承较快磨损。&l;/p&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.3 凹痕 &l;/p&g; &l;p&g;2.3.1 轴承拆装时施力不当、过盈配合过大、锥孔轴承轴套过度胀紧，轴承未运转时受不对称或非正常载荷，使座圈和滚子上形成凹痕，有时轴承圈上的凹痕与滚子的间距是一致的。&l;/p&g; &l;p&g;2.3.2 毛刺类杂质卷入滚动中座环会产生碾压凹痕，导致凹痕的粒子并不一定很硬，碎纸、纤维也可能导致这种情况。&l;/p&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.4 瘢痕&l;/p&g; &l;p&g;推力球轴承若载荷不足情况下转速过高，离心力会把滚珠甩向滚道外侧，滚珠与滚道产生相对滑动而非正常滚动，导致滚道外侧形成倾斜的条状划擦痕迹，一般通过对轴承附加预紧载荷（如弹簧）可以避免。此外，一些轴承定位件、压紧件及随轴旋转件的各种缺陷也会在轴承上留下损伤痕迹。&l;/p&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.5 腐蚀和锈蚀&l;/p&g; &l;p&g;暴露在空气中的轴承金属表面会产生一层很薄的氧化保护膜，但若无润滑油保护，此薄膜极易破坏，一经与水或腐蚀元素接触，就会产生腐蚀痕迹并迅速扩展。如盐水能产生电解腐蚀，一般硫酸腐蚀很快，硝液腐蚀较弱。腐蚀也可因摩擦引起氧化薄膜破坏，氧化逐渐渗透至材料内部，锈蚀处破裂形成凹坑，产生承载不均匀，载荷分布恶化。&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/轴承箱.png&quo;syle=&quo;widh:432px;heigh:416px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.6 电击&l;/p&g; &l;p&g;当对机械设备施焊，电流从一个轴承环经滚子流向另一个环，接触点产生高温电弧，局部材料受热产生大小不一的变色或灼伤区域，此处材料被回火、被再次硬化或融化，形成凹坑褶皱，滚动受到影响，外环滚道上的剥落会因碾压周向扩展，滚子上的灼伤有黑色或变色瘢痕。直流电和交流电都能损伤轴承，即使是很小的电流。转动着的轴承对电流损害更敏感，损伤的程度取决于电流强度、持续时间、载荷、速度和润滑。&l;/p&g; &l;p&g;有时电流产生的凹痕与振动引起的凹痕非常相似，一般较难区分，但是前者产生的凹痕底部深暗发黑，通常不明亮不锈蚀；而振动引起的凹痕底部较亮或带锈迹；另一个特征是振动损伤主要在滚道上，滚子上无明显损伤。&l;/p&g; &l;p&g;2.7 剥落&l;/p&g; &l;p&g;通常的轴承剥落并非疲劳已达到额定寿命，而有可能存在6种情况。&l;/p&g; &l;div&g; &l;p&g;2.7.1 轴承配置选型不当，装调预载荷过大，配合过紧造成轴承运行过载荷。&l;/p&g; &l;p&g;2.7.2 运行轴承散热不良，材料间相互温差过大，轴承圈热变形和局部高负载会引起剥落。&l;/p&g; &l;p&g;2.7.3 剖分式轴承座中分面错位或连接螺栓过紧，致轴承孔失圆而形成附加载荷。&l;/p&g; &l;p&g;2.7.4 双支型轴承浮动端移动度受限，不能释放热膨胀引起的轴向附加载荷，导致挤压。&l;/p&g; &l;p&g;2.7.5 安装倾斜，定位不良或缺乏定位，内外圈不同轴，深沟球轴承直径两端造成严重的倾斜受力印痕和剥落；圆柱滚子轴承则在内圈一侧滚道边缘超载出现印痕和剥落。&l;/p&g; &l;p&g;2.7.6 硬粒杂质污染碾压造成剥落，其它如表面腐蚀、锈蚀、摩擦或电击损害等引起的剥落，当剥落到一定程度时，通过声音和振动的不正常可以判断出。&l;/p&g; &l;/div&g; &l;p&g; &l;/p&g; &l;div&g; &l;psyle=&quo;magin-lef:31.5000p;&quo;&g;2.8 断裂&l;/p&g; &l;p&g;2.8.1 野蛮拆装，对内外环的直接锤击或以硬物敲凿都将导致裂纹或碎片脱落；球面滚子轴承装配时受敲击易造成中部法兰破裂，或撞击力由另一列滚子传递后造成另一侧内环外挡边破裂。&l;/p&g; &l;p&g;2.8.2 锥形内孔或胀套紧力过度，圆柱孔内圈配合过盈量过大，导致过度加热后与主轴套装过紧，造成内环上过大的附加拉应力，在运行载荷作用下容易断裂。&l;/p&g; &l;/div&g; &l;p&g; &l;/p&g; &l;p&g;2.8.3 轴承内圈与主轴配合不够紧，运行中产生相对转动和摩擦，易导致内圈裂纹或横贯摩擦面的断裂。&l;/p&g; &l;p&g;2.8.4 深沟球轴承易产生外圈周向断裂，严重磨损锈蚀的球面滚子轴承易产生内圈横向断裂。&l;/p&g; &l;p&g;2.9 保持架损坏&l;/p&g; &l;p&g;2.9.1 剧烈振动下滚子惯性力会使保持架受冲击过载荷，保持架内部会疲劳产生裂纹，这些裂纹迟早会导致保持架破裂。&l;/p&g; &l;p&g;2.9.2 若轴承转速超过保持架设计强度，保持架也会因高速产生的巨大惯性力而破坏&l;song&g;。&l;/song&g;&l;/p&g; &l;p&g;2.9.3 使用滚动轴承的初衷是避免滑动摩擦，但保持架和与其接触的轴承组件不可避免地会产生滑动摩擦。保持架材料相对偏软，若润滑不充分和微粒研磨，磨损相对较快，当保持架尺寸因磨损减小后，间隙增大，对滚动件的导向作用减弱，滚动会偏离正常运动轨迹，会更加速保持架失效。&l;/p&g; &l;p&g;2.9.4 若硬质颗粒进入保持架阻碍了滚子正常旋转，也将导致保持架失效。&l;/p&g; &l;p&g;2.9.5 其它原因：若轴承安装时内外环轴心偏移或轴承间隙增大，滚子以椭圆和非正常轨迹运动，那么保持架每转一圈都必定改变形状，产生附加载荷或承受剧烈加速、减速及速度波动和惯性力的影响，其内部材料迟早会因疲劳导致破损。&l;/p&g; &l;p&g;&l;song&g;3 结论&l;/song&g;&l;/p&g; &l;p&g;总之，只要注意保护运行现场和保留失效轴承遗留物件，认真进行观察分析和不断总结积累经验，就能找到解决问题的方法和思路，从失效轴承的运行环境和损坏痕迹分析中获益。&l;/p&g;

&l;p&g;1 概述&l;/p&g; &l;p&g;离心通风机叶轮由于刚度差而导致失效的现象时有发生。其机理为叶片受离心力作用而弯曲变形，且各叶片弯曲变形的程度又不可能完全相同，因而使平衡遭到破坏，以致于最后失效。尤其是宽径比比较大的风机，如4－73、4－60、6－40等，在高圆周速度条件下，这个问题就更为突出。此外，在实际工作中，还会经常遇到为解决耐磨问题而将4－73的机翼型叶片改为板式叶片的情况，显然，其刚度会明显下降。为此，通常采用增加副前盘的结构方案进行解决，如图1所示；但在何种条件下加副前盘以及设计成何种形式的副前盘，则依靠设计者的经验。然而，是否成功则需要在试验台或工业现场进行考核。&l;/p&g; &l;p&g;因此，在设计阶段对离心通风机叶轮的刚度进行计算是很有必要的，也是必须得完成的一个项目。但目前笔者能查阅到的只是在文献[1]中提到的刚度校核公式，而实际应用时，却发现还有一些问题无法解决：一是该公式没有推导过程。因而，对其建模过程不了解；二是具体变形量无具体数值。因而，对不同的风机或不同的使用场合，如何提出变形控制指标就无从下手；三是按此公式计算刚度，如果结果达不到要求，设计成何种形式的副前盘也无法判断，因为不知道叶片上何处刚性薄弱。&l;/p&g; &l;p&g;因此，确定适用的离心通风机刚度的工程计算方法，对风机的设计、工艺和生产有重要作用。&l;/p&g; &l;p&g; &l;/p&g; &l;p&g;2 计算模型的建立&l;/p&g; &l;p&g;离心通风机叶轮由前盘、叶片、后盘或中盘，焊接或铆接而成。多数叶轮的前盘均有锻件或铆焊件进口圈，而且部分叶轮的前盘在靠近外缘部位还焊接有多种形式的调频环以加强其刚性；而后盘或中盘一般厚度较大（不少叶轮后盘或中盘还有锻件辐板或焊接辐板），用螺栓与铸件轮毂或主轴联接。因此，就风机叶轮结构和工作特点而言，前盘和后盘或中盘的刚性较强，而叶片的刚性相对较弱，叶轮刚性问题也就表现为叶片的刚性问题。所以，在设计和生产中，保证了叶片的刚度也就保证了整个离心叶轮的刚度。&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/前盘.png&quo;syle=&quo;widh:510px;heigh:381px;&quo;/&g;&l;/p&g; &l;p&g;对叶片的受力情况进行初步分析：与叶片自身离心力相比，其受到的气动力的数量级太小，在计算刚度时可忽略不计。因此，应主要考虑叶片离心力的影响。沿着叶片型线从进口到出口边，由于半径和方向的变化，其离心力的大小和方向也在变化，不可否认，其变形量的大小也会随着半径的不同而变化，即其变形不是均匀的；但沿着叶轮轴向方向，可以认为其沿叶片宽度方向受均布载荷。也就是说，可以把叶片看成沿叶片宽度方向受均布载荷的固定梁（如焊接叶轮）或简支梁（如铆接叶轮），这是建立数学模型的基础。&l;/p&g; &l;p&g;3 计算公式的推导&l;/p&g; &l;p&g;3.1 钢制板式后弯叶片焊接叶轮&l;/p&g; &l;p&g;为了分析不同半径处叶片的变形量，如图2所示，可取任意一个叶片，假设在半径&l;em&g;r&l;/em&g;处取一微元&l;em&g;b&l;/em&g; ，其厚度为&l;em&g;&dela;&l;/em&g;，其长度（即叶片宽度）为&l;em&g;l&l;/em&g;，则该微元在旋转角速度&l;em&g;ω&l;/em&g;(1/ad)或转速&l;em&g;n&l;/em&g;下产生离心力&l;em&g;p&l;/em&g;,该&l;em&g;p&l;/em&g;值又可分解成&l;em&g;p&l;/em&g;&l;sub&g;1&l;/sub&g;和&l;em&g;p&l;/em&g;&l;sub&g;2&l;/sub&g;。沿&l;em&g;p&l;/em&g;&l;sub&g;2&l;/sub&g;方向叶片抗弯模量极大，可以忽略&l;em&g;p&l;/em&g;&l;sub&g;2&l;/sub&g;产生的变形。因此，计算和控制&l;em&g;p&l;/em&g;&l;sub&g;1&l;/sub&g;产生的变形则是主要矛盾。作为均布载荷，若&l;em&g;p&l;/em&g;&l;sub&g;1&l;/sub&g;=&l;em&g;ql&l;/em&g;，则该微元就可简化成如图3所示的受均布载荷的固定梁模型。&l;/p&g; &l;p&g;   &l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/gangdu.png&quo;syle=&quo;widh:573px;heigh:785px;&quo;/&g;&l;/p&g; &l;p&g;在材质具有连续性、均匀性、各向同性和变形控制在弹性变形范围内的假设下，上述计算模型就把叶轮的刚度问题转化成求解该微元的最大变形并控制该变形量的问题。&l;/p&g; &l;p&g;设材质的弹性模量为&l;em&g;e&l;/em&g;，微元的惯性矩为&l;em&g;i&l;/em&g;。分析图3，显然，&l;em&g;m&l;/em&g;&l;em&g;&l;sub&g;a&l;/sub&g;&l;/em&g;=&l;em&g;m&l;/em&g;&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g;，&l;em&g;r&l;/em&g;&l;em&g;&l;sub&g;a&l;/sub&g;&l;/em&g;=&l;em&g;r&l;/em&g;&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g;=0.5&l;em&g;ql&l;/em&g;，其最大变形发生在0.5&l;em&g;l&l;/em&g;处；并且边界约束条件为在&l;em&g;x&l;/em&g;=0或&l;em&g;x&l;/em&g;=&l;em&g;l&l;/em&g;时，&l;em&g;f&l;/em&g;=0。由于其为静不定结构，需要另外寻求变形协调方程。应用线性叠加原理，则图3的模型可以分解成图4、图5和图6三个模型，也就是前者是后三者的线形叠加，于是：&l;/p&g; &l;p&g; &l;em&g;f &l;/em&g;= &l;em&g;f&l;/em&g;&l;sub&g;1&l;/sub&g;  &l;em&g;f&l;/em&g;&l;sub&g;2&l;/sub&g;  &l;em&g; f&l;/em&g;&l;sub&g;3&l;/sub&g;                                               (1)&l;/p&g; &l;p&g; (&l;em&g;f&l;/em&g; )&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g; = (&l;em&g;f&l;/em&g;&l;sub&g;1&l;/sub&g;) &l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g;  (&l;em&g;f&l;/em&g;&l;sub&g;2&l;/sub&g;)&l;em&g;&l;sub&g; b&l;/sub&g;&l;/em&g;  (&l;em&g;f&l;/em&g;&l;sub&g;3&l;/sub&g;) &l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g;                                       (1a)&l;/p&g; &l;p&g;&l;em&g;f&l;/em&g;&l;sub&g;max&l;/sub&g; = (&l;em&g;f&l;/em&g;&l;sub&g;1&l;/sub&g;)&l;sub&g; 0.5&l;/sub&g;&l;em&g;&l;sub&g;l&l;/sub&g;&l;/em&g;  (&l;em&g;f&l;/em&g;&l;sub&g;2&l;/sub&g;)&l;sub&g; 0.5&l;/sub&g;&l;em&g;&l;sub&g;l&l;/sub&g;&l;/em&g;  (f&l;sub&g;3&l;/sub&g;)&l;sub&g;0.5&l;/sub&g;&l;em&g;&l;sub&g;l&l;/sub&g;&l;/em&g;                                                  (1b)&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;受均布载荷&l;em&g;q&l;/em&g;的悬臂梁（见图4）&l;/li&g; &l;/ul&g; &l;p&g;其变形曲线方程为&l;/p&g; &l;p&g; &l;/p&g; &l;p&g;&l;imgheigh=&quo;1&quo;sc=&quo;file:///c:\uses\admini~1\appdaa\local\temp\ksohml13868\wps4.png&quo;widh=&quo;49&quo;/&g;&l;em&g;f&l;/em&g;&l;sub&g;1&l;/sub&g; =&l;em&g;qx&l;/em&g;&l;sup&g;2&l;/sup&g; * (&l;em&g;x&l;/em&g;&l;sup&g;2&l;/sup&g; －4&l;em&g;lx&l;/em&g;  6&l;em&g;l&l;/em&g;&l;sup&g;2&l;/sup&g;  ）/（24 &l;em&g;ei&l;/em&g; ）            （2)&l;/p&g; &l;p&g;        &l;/p&g; &l;p&g;在&l;em&g;b&l;/em&g;点，其变形量为&l;/p&g; &l;p&g;              （&l;em&g;f&l;/em&g;&l;sub&g;1&l;/sub&g;）&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g; =     &l;em&g;ql&l;/em&g;&l;sup&g;4&l;/sup&g;  /（8 &l;em&g;ei&l;/em&g; ）                (2a)&l;/p&g; &l;p&g;    &l;/p&g; &l;p&g;在0.5&l;em&g;l&l;/em&g;点，其变形量为&l;/p&g; &l;p&g;         （&l;em&g;f&l;/em&g;&l;sub&g;1&l;/sub&g;）&l;sub&g;0.5&l;/sub&g;&l;em&g;&l;sub&g;l&l;/sub&g;&l;/em&g; =    17&l;em&g;ql&l;/em&g;&l;sup&g;4&l;/sup&g; /（384 &l;em&g;ei&l;/em&g; ）               (2b)&l;/p&g; &l;p&g;  (2)受集中载荷&l;em&g;r&l;/em&g;&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g;的悬臂梁（见图5）&l;/p&g; &l;p&g;其变形曲线方程为&l;/p&g; &l;p&g;&l;em&g;f&l;/em&g;&l;sub&g;2&l;/sub&g; =－ &l;em&g;qx&l;/em&g;&l;sup&g;2&l;/sup&g;   (3&l;em&g;l&l;/em&g;  －&l;em&g;x &l;/em&g;)&l;em&g;l&l;/em&g; / （12&l;em&g; ei&l;/em&g; ）            (3)&l;/p&g; &l;p&g; 在&l;em&g;b&l;/em&g;点，其变形量为&l;/p&g; &l;p&g;&l;em&g;（f&l;/em&g;&l;sub&g;1&l;/sub&g;）&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g; = -&l;em&g;ql&l;/em&g;&l;sup&g;4&l;/sup&g; / （ 6 &l;em&g;ei&l;/em&g; ）               (3a)&l;/p&g; &l;p&g; 在0.5&l;em&g;l&l;/em&g;点，其变形量为&l;/p&g; &l;p&g; （&l;em&g;f&l;/em&g;&l;sub&g;2&l;/sub&g;）&l;sub&g;0.5&l;/sub&g;&l;em&g;&l;sub&g;l&l;/sub&g;&l;/em&g; =－5 &l;em&g;ql&l;/em&g;&l;sup&g;4&l;/sup&g; /（ 96 &l;em&g;ei&l;/em&g; ）            (3b)&l;/p&g; &l;p&g;   (3)受弯矩&l;em&g;m&l;/em&g;&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g;的悬臂梁（见图6）&l;/p&g; &l;p&g;其变形曲线方程为&l;/p&g; &l;p&g;&l;em&g;f&l;/em&g;&l;sub&g;3&l;/sub&g; = &l;em&g;m&l;/em&g;&l;em&g;&l;sub&g;b &l;/sub&g;&l;/em&g;&l;em&g;x&l;/em&g;&l;sup&g;2&l;/sup&g;/ （2 &l;em&g;ei&l;/em&g; ）                         (4)&l;/p&g; &l;p&g; 在&l;em&g;b&l;/em&g;点，其变形量为&l;/p&g; &l;p&g;（&l;em&g;f&l;/em&g;&l;sub&g;3&l;/sub&g;）&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g; =&l;em&g;m&l;/em&g;&l;em&g;&l;sub&g;b &l;/sub&g;&l;/em&g;&l;em&g;l&l;/em&g;&l;sup&g;2&l;/sup&g;/ 2 &l;em&g;ei&l;/em&g;                                                  (4a)&l;/p&g; &l;p&g;  在0.5&l;em&g;l&l;/em&g;点，其变形量为&l;/p&g; &l;p&g;      （&l;em&g;f&l;/em&g;&l;sub&g;3&l;/sub&g;）&l;sub&g;0.5&l;/sub&g;&l;em&g;&l;sub&g;l&l;/sub&g;&l;/em&g; = &l;em&g;m&l;/em&g;&l;em&g;&l;sub&g;b &l;/sub&g;&l;/em&g;&l;em&g;l&l;/em&g;&l;sup&g;2&l;/sup&g; / （ 8 &l;em&g;ei）&l;/em&g;                       (4b)&l;/p&g; &l;p&g;根据式（1a）和已知边界条件&l;em&g;x&l;/em&g;=&l;em&g;l&l;/em&g;,(&l;em&g;f&l;/em&g; )&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g;=0，可以求出&l;em&g;m&l;/em&g;&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g;，则&l;/p&g; &l;p&g; &l;em&g;m&l;sub&g;a&l;/sub&g;&l;/em&g;=&l;em&g;m&l;/em&g;&l;em&g;&l;sub&g;b&l;/sub&g;&l;/em&g; =  &l;em&g; ql&l;/em&g;&l;sup&g;2&l;/sup&g;/12                                                  (5)&l;/p&g; &l;p&g; 又根据式（1b）求出在&l;em&g;x&l;/em&g;=0.5&l;em&g;l&l;/em&g;时，图3中的最大变形量为&l;/p&g; &l;p&g;   &l;em&g;f&l;/em&g;&l;sub&g;max&l;/sub&g;=  &l;em&g;  ql&l;/em&g;&l;sup&g;4&l;/sup&g;/ 384&l;em&g;ei&l;/em&g;                                                              (6)&l;/p&g; &l;p&g; 将分布载荷&l;em&g;q&l;/em&g; =&l;em&g;p&l;/em&g;&l;sub&g;1&l;/sub&g;/&l;em&g;l&l;/em&g; =（&l;em&g;p&l;/em&g; sin&l;em&g;φ&l;/em&g;）/&l;em&g;l&l;/em&g; =（&l;em&g;ω&l;/em&g;&l;sup&g;2&l;/sup&g; &l;em&g;r&l;/em&g;&l;em&g;&ho;&l;/em&g;&l;em&g;b&l;/em&g;&l;em&g;&dela;&l;/em&g;&l;em&g;l&l;/em&g; sin&l;em&g;φ&l;/em&g;）/&l;em&g; l&l;/em&g; =&l;em&g;ω&l;/em&g;&l;sup&g;2&l;/sup&g; &l;em&g;r&l;/em&g;&l;em&g;&ho;&l;/em&g;&l;em&g;b&l;/em&g;&l;em&g;&dela;&l;/em&g;sin&l;em&g;φ&l;/em&g;和微元的惯性矩&l;em&g;i&l;/em&g; =&l;em&g;&dela;&l;/em&g;&l;sup&g;3&l;/sup&g; &l;em&g;b&l;/em&g; /12,以及弹性模量&l;em&g;e&l;/em&g; =2.06&imes;10&l;sup&g;11&l;/sup&g;(pa)和钢的密度&l;em&g;&ho;&l;/em&g; =7.85&imes;10&l;sup&g;3&l;/sup&g;(kg/m&l;sup&g;3&l;/sup&g;),&l;em&g;ω&l;/em&g;=2π&l;em&g;n&l;/em&g; /60(1/ad)代入式（6），则得出在叶片上任意半径&l;em&g;r&l;/em&g;处的最大变形量为&l;/p&g; &l;p&g;   &l;em&g;f&l;/em&g;&l;sub&g;max&l;/sub&g;=  &l;em&g;k&l;/em&g;  &l;em&g; rn&l;/em&g;&l;sup&g;2 &l;/sup&g;&l;em&g;l&l;/em&g;&l;sup&g;4 &l;/sup&g; sin&l;em&g;φ&l;/em&g; /   &l;em&g;&dela;&l;/em&g;&l;sup&g;2&l;/sup&g;                            (7)&l;/p&g; &l;p&g; 式中，常数&l;em&g;k&l;/em&g; =1.3059&imes;10&l;sup&g;-11&l;/sup&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;叶轮刚度的校核&l;/li&g; &l;/ul&g; &l;p&g;显然，式（7）可以计算叶片上任意半径r处的最大变形量，从而为变形量的控制提供了依据。笔者认为，只要把叶轮叶片变形量控制在允许值范围内，就可以保证刚性安全，即&l;/p&g; &l;p&g;               &l;em&g;k&l;/em&g; &l;em&g;rn&l;/em&g;&l;sup&g;2&l;/sup&g; &l;em&g;l&l;/em&g;&l;sup&g;4&l;/sup&g; sin&l;em&g;φ&l;/em&g; / &l;em&g;&dela;&l;/em&g;&l;sup&g;2 &l;/sup&g;  ≤    &l;em&g;f&l;/em&g; [&l;em&g;l&l;/em&g; ] /&l;em&g;l&l;/em&g;                    (8)&l;/p&g; &l;p&g;其还可以化成下式&l;/p&g; &l;p&g;              &l;em&g; &l;/em&g; &l;em&g;k&l;/em&g; &l;em&g;rn&l;/em&g;&l;sup&g;2 &l;/sup&g; &l;em&g;l&l;/em&g;&l;sup&g;4 &l;/sup&g; sin&l;em&g;φ&l;/em&g; / &l;em&g;&dela;&l;/em&g;&l;sup&g;2 &l;/sup&g;   ≤     &l;em&g;f&l;/em&g; /&l;em&g;l&l;/em&g;                    (9)&l;/p&g; &l;p&g;相比之下，式（9）在使用时比式（8）更方便一些。&l;/p&g; &l;psyle=&quo;magin-lef:10.5000p;&quo;&g;在具体计算中，原则上只需校核叶片进、出口和中部3个半径处的刚度，就可以了解和掌握整个叶轮的刚度情况，因而副前盘的形式也由此确定。&l;/p&g; &l;p&g; &l;/p&g; &l;p&g;3.2 钢制机翼型叶片的焊接式叶轮&l;/p&g; &l;p&g;式（6）也适用于钢制机翼型叶片的焊接式叶轮。&l;/p&g; &l;p&g;设叶片质量为&l;em&g;m&l;/em&g;,重心所在半径为&l;em&g;r&l;/em&g;&l;em&g;&l;sub&g;c&l;/sub&g;&l;/em&g;，对应的叶片宽度为&l;em&g;l&l;/em&g;，叶片离心力为&l;em&g;p&l;/em&g;，且&l;em&g;p&l;/em&g;又可分解成沿叶片的法向力&l;em&g;p&l;/em&g;&l;sub&g;1&l;/sub&g;和切向力&l;em&g;p&l;/em&g;&l;sub&g;2&l;/sub&g;，而&l;em&g;p&l;/em&g;与&l;em&g;p&l;/em&g;&l;sub&g;2&l;/sub&g;夹角为&l;em&g;φ&l;/em&g;；又将机翼型叶片截面简化为椭圆（忽略叶片加强筋板对刚性的有利因素），其中：外椭圆短半径&l;em&g;a&l;/em&g;&l;sub&g;1&l;/sub&g;，内椭圆短半径&l;em&g;a&l;/em&g;&l;sub&g;2&l;/sub&g;，外椭圆长半径&l;em&g;b&l;/em&g;&l;sub&g;1&l;/sub&g;，内椭圆长半径&l;em&g;b&l;/em&g;&l;sub&g;2&l;/sub&g;。于是，椭圆截面的惯性矩&l;em&g;i&l;/em&g;=(&l;em&g;a&l;/em&g;&l;sub&g;1&l;/sub&g;&l;sup&g;3&l;/sup&g;&l;em&g;b&l;/em&g;&l;sub&g;1&l;/sub&g;－   &l;em&g;a&l;/em&g;&l;sub&g;2&l;/sub&g;&l;sup&g;3&l;/sup&g;&l;em&g;b&l;/em&g;&l;sub&g;2&l;/sub&g;)π/4。&l;/p&g; &l;p&g;将分布载荷&l;em&g;q&l;/em&g; =&l;em&g;p&l;/em&g;&l;sub&g;1&l;/sub&g;/&l;em&g;l&l;/em&g; =（&l;em&g;p&l;/em&g; sin&l;em&g;φ）&l;/em&g;/&l;em&g;l&l;/em&g; =（&l;em&g;ω&l;/em&g;&l;sup&g;2 &l;/sup&g;&l;em&g;r&l;/em&g;&l;em&g;&l;sub&g;c&l;/sub&g;&l;/em&g; &l;em&g;m&l;/em&g; sin&l;em&g;φ&l;/em&g;）/l和其惯性矩&l;em&g;i&l;/em&g;,以及弹性模量&l;em&g;e&l;/em&g; =2.06&imes;10&l;sup&g;11&l;/sup&g;(n/m&l;sup&g;2&l;/sup&g;)和ω=2πn/60(1/ad)代入式（6），则得出在叶片重心半径&l;em&g;rc&l;/em&g;处的最大变形量为&l;/p&g; &l;p&g; &l;em&g;f&l;/em&g;&l;sub&g;max &l;/sub&g;=&l;em&g; k&l;/em&g; &l;em&g;mr&l;sub&g;c&l;/sub&g;&l;/em&g;&l;em&g; n&l;/em&g;&l;sup&g;2 &l;/sup&g; &l;em&g;l&l;/em&g;&l;sup&g;3 &l;/sup&g;sin&l;em&g;φ/&l;/em&g;   &l;em&g; （a&l;/em&g;&l;sub&g;1&l;/sub&g;&l;sup&g;3&l;/sup&g;&l;em&g;b&l;/em&g;&l;sub&g;1&l;/sub&g;－   &l;em&g;a&l;/em&g;&l;sub&g;2&l;/sub&g;&l;sup&g;3&l;/sup&g;&l;em&g;b&l;/em&g;&l;sub&g;2&l;/sub&g; ）          (10)                  则其叶轮刚度的校核公式为&l;/p&g; &l;p&g;           &l;em&g;k&l;/em&g;   &l;em&g;mr&l;/em&g;&l;em&g;&l;sub&g;c &l;/sub&g;&l;/em&g;&l;em&g;n&l;/em&g;&l;sup&g;2 &l;/sup&g; &l;em&g;l&l;/em&g;&l;sup&g;2 &l;/sup&g;sin&l;em&g;φ&l;/em&g; /（&l;em&g;a&l;/em&g;&l;sub&g;1&l;/sub&g;&l;sup&g;3&l;/sup&g;&l;em&g;b&l;/em&g;&l;sub&g;1&l;/sub&g;－   &l;em&g;a&l;/em&g;&l;sub&g;2&l;/sub&g;&l;sup&g;3&l;/sup&g;&l;em&g;b&l;/em&g;&l;sub&g;2&l;/sub&g; ） ≤   [f/ &l;em&g;l&l;/em&g; ]             (11)&l;/p&g; &l;p&g;式（10）和式（11）中，&l;em&g;k&l;/em&g; =1.7651&imes;10&l;sup&g;-16&l;/sup&g;&l;/p&g; &l;p&g;3.3 钢制铆接式板式叶片叶轮&l;/p&g; &l;p&g;其模型简化为受均布载荷的简支梁，则边界约束条件与上述不同；同时，在控制变形量方面应同时控制最大变形量和两端的转角。但通过具体推导（此处略），叶轮变形和转角的计算公式相当，则可合并成与式（9）相同的形式，但是&l;em&g;k&l;/em&g; =6.5295&imes;10&l;sup&g;-11&l;/sup&g;&l;/p&g; &l;p&g;4 叶片变形量容许值&l;/p&g; &l;p&g;原则上讲，要控制旋转状态下叶片使其不变形是根本做不到的，关键是如何确定一个既安全又经济的指标。对于一个旋转主轴，一般变形量指标控制在[&l;em&g;f/l&l;/em&g;]=1/5000～1/10000；对于离心通风机超速试验后的塑形变形控制在[&l;em&g;f/l&l;/em&g;]=1/1000；而对于离心通风机在运行中的变形量指标，至今尚未看到有关权威报道。为此，只有根据经验法进行类比。从多年生产风机及对国外进口风机国产化改造的经验来看，一般选取[f/l]=1/100就可以满足安全要求；如果超过该值，就要采取相应的增强刚度的措施，如根据叶片刚性的薄弱环节，增加不同形式的副前盘。当然，也不排除今后通过大量的工业实践，针对不同风机或不同使用场合继续放宽该指标的可能。&l;/p&g; &l;p&g;5 结论&l;/p&g; &l;p&g;根据对叶轮叶片刚度计算的详细建模过程，提出了刚度计算和校核的方法，并借助于大量的工程应用经验，解决了离心通风机设计和生产中的实际技术问题，实践证明这是一种十分实用的工程计算方法。&l;/p&g; &l;p&g; &l;/p&g;

&l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;fon-size:16px;&quo;&g;管道的保温方式是将保温材料敷设在管道的外表面，保温层厚度过小，达不到保温的目的，保温层过厚，又会造成不必要的浪费，本文通过分析计算保温层的合理厚度，用最经济的方式达到保温的目的。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/11111.png&quo;syle=&quo;widh:696px;heigh:925px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/2222.png&quo;syle=&quo;widh:758px;heigh:935px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/33333.png&quo;syle=&quo;widh:719px;heigh:936px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/44444.png&quo;syle=&quo;widh:710px;heigh:902px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/55555.png&quo;syle=&quo;widh:698px;heigh:486px;&quo;/&g;&l;/p&g;

&l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机是大型的旋转机械，振动是风机设备运行是否正常的一个主要指标。振动如果超过相关标准的要求，就说明风机工作是不正常的，需要查找原因并消除安全隐患。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;大型的风机设备一般都配置有轴承测振装置，在中控室中可以实时监测风机的振动情况。振动大也是风机常见的运行问题，下面就介绍典型的故障以及判断方法。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;动平衡问题&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转子不平衡而引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频率主要在一倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动稳定，相位稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动对负荷不敏感&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动随转速的增加而增大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转子动平衡造成的振动大的典型频谱见下图：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/叶轮不平衡.png&quo;syle=&quo;widh:540px;heigh:311px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;造成转子动不平衡的原因主要有：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:cicle;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转子结垢&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;不均匀积灰&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;不均匀磨损、腐蚀等&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;叶轮零件松动或者脱落&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;叶片裂纹&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转子不对中&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转子不对中引起的振动特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动以二倍频为主，常伴有一倍频和三倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;轴向振动也较大，以二倍频为主，伴有一倍频和三倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动随负荷增大而增大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;轴承如果不对中，径向振动较大，而且振动不稳定。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转子不对中造成的振动大的典型频谱见下图：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/不对中.png&quo;syle=&quo;widh:534px;heigh:309px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;主轴弯曲&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于主轴弯曲而引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频率主要在一倍频，常伴有二倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动稳定，相位稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于主轴弯曲造成的振动大的典型频谱如下图：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/主轴弯曲.png&quo;syle=&quo;widh:534px;heigh:310px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转动&l;/span&g;&l;/song&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;部件与静态&l;/span&g;&l;/song&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;件摩擦&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转动部件与静态件摩擦引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频率为高次谐波、低次谐波以及组合频率，常伴有一倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动不稳定，相位不稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动为自激振动，与转速无关。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转动部件与静态件摩擦集流器与叶轮进口摩擦、叶轮与机壳摩擦、主轴与轴封摩擦、刹车片与刹车盘的摩擦等。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;基础刚度不够或者基础与底座连接松动&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于基础刚度不够或者基础与底座连接松动引起的振动的特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;出现3到10倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大，尤其是垂直方向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;有时出现基础频率分数谐波，比如1/2、3/2等频率&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动不稳定，相位不稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;轴向振动正常。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于本原因造成的振动大的典型频谱见下图：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/基础松动.png&quo;syle=&quo;widh:535px;heigh:308px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机失速&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于失速引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频率为组合频率&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动大幅度增加且波动，相位不稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机的噪音大大增加&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;有可能出现风量减小、电机电流减小等现象。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;处理风机的振动问题是比较复杂的，只要掌握不同振动的原因和基本特征，加上平时的经验积累，就能够通过各种分析判断并找到风机产生振动故障的原因，并采取针对性的措施，进而提高风机的安全可靠性，为企业的正常生产贡献应有的力量。&l;/span&g;&l;/p&g;

&l;palign=&quo;jusify&quo;&g;引风机是工作条件比较差的锅炉辅助设备。众所周知,它是在含尘气流中工作的。燃&l;/p&g; &l;palign=&quo;jusify&quo;&g;煤锅炉烟气中的飞灰对引风机产生磨损,也会沉积在引风机叶片上。由于积灰和磨损是不&l;/p&g; &l;palign=&quo;jusify&quo;&g;均匀的,从而使风机的平衡破坏,引起振动,有的锅炉甚至因此而不能正常运行。一般地&l;/p&g; &l;palign=&quo;jusify&quo;&g;说,对于使用干式除尘器的锅炉,引风机比较容易磨损,而对于使用湿式除尘器的锅炉,&l;/p&g; &l;palign=&quo;jusify&quo;&g;引风机则比较容易积灰,尤其是除尘器工作不良时,水点飞溅,烟气带水,引风机叶片积&l;/p&g; &l;palign=&quo;jusify&quo;&g;灰更为严重。&l;/p&g; &l;palign=&quo;jusify&quo;&g;影响引风机暦损和积灰的主要因素&l;/p&g; &l;palign=&quo;jusify&quo;&g;一)除尘器运行工况&l;/p&g; &l;palign=&quo;jusify&quo;&g;除尘器运行工况的好坏,对引风机积灰及磨损影啊很大。&l;/p&g; &l;palign=&quo;jusify&quo;&g;例如某厂有一台媒粉炉,过去由于除尘器工作不良,引风机仅用三个月就必须更换叶&l;/p&g; &l;palign=&quo;jusify&quo;&g;轮;现在自己设计制造了一台水膜式除尘器,引风机已使用了两年还不见磨损很严重。&l;/p&g; &l;palign=&quo;jusify&quo;&g;二)风机形式&l;/p&g; &l;palign=&quo;jusify&quo;&g;风机形式对瘤损的程度也有着显著的影响。一般反映idm型风机比7-29型风机耐磨&l;/p&g; &l;palign=&quo;jusify&quo;&g;单直板型5-48、6-30风机比4-72、4-73机翼型耐磨。我们认为风机形式对磨损的影&l;/p&g; &l;palign=&quo;jusify&quo;&g;响主要是由于空气动力的原因。如果风机设计合理,使气流中的微粒均匀分布,不导致集&l;/p&g; &l;palign=&quo;jusify&quo;&g;中磨损,则风机的使用寿命就长。如某厂idm型风机磨损均匀,因此其使用时间长。另&l;/p&g; &l;palign=&quo;jusify&quo;&g;外,idm型凤机为后弯机翼型风机,气流与叶片的作用不如前弯式叶片的7-29型风机强&l;/p&g; &l;palign=&quo;jusify&quo;&g;烈,因此其磨性也较好。一般来说,在直径相同时前弯式风机比较易磨损。&l;/p&g; &l;palign=&quo;jusify&quo;&g;这里需要指出,后弯式机翼型风机用于排粉风机和引风机时,必须考虑到当机翼前缘&l;/p&g; &l;palign=&quo;jusify&quo;&g;磨穿后,易发生叶片内部积灰引起振动的问题。在选型、设计和制造中,应予以充分的重&l;/p&g; &l;palign=&quo;jusify&quo;&g;视。&l;/p&g; &l;palign=&quo;jusify&quo;&g;三)风机转速&l;/p&g; &l;palign=&quo;jusify&quo;&g;据排粉风机试验指出,排粉风机的金属磨耗量与转速的平方成正比,即w&l;gn&l;sup&g;2&l;/sup&g;,w&l;/p&g; &l;palign=&quo;jusify&quo;&g;为磨耗量,g为送粉量,n为转速。&l;/p&g; &l;palign=&quo;jusify&quo;&g;(四)磨损件材质&l;/p&g; &l;palign=&quo;jusify&quo;&g;风机的磨损速度随磨损部件材料的硬度增加而减小。但是耐磨性不仅取决于它的硬度,&l;/p&g; &l;palign=&quo;jusify&quo;&g;而且还与它的成分有关。如经热处理的各种不同成分的钢,虽有相同的硬度,却有不同的&l;/p&g; &l;palign=&quo;jusify&quo;&g;耐磨性。还应指出,碳钢由于淬火提高硬度而提高的耐磨性是比较小的。如40号碳钢谇火&l;/p&g; &l;palign=&quo;jusify&quo;&g;后,其硬度由163增加到730,增加了3.5倍,而其耐磨性仅增加69%。又如某厂鼓形钢球&l;/p&g; &l;palign=&quo;jusify&quo;&g;磨煤机直吹系统用0,4-90°型排粉风机,其叶片用普通磯钢表面渗碳并溶火后,其硬度至&l;/p&g; &l;palign=&quo;jusify&quo;&g;rc=60以上;硬度值提高4倍,但其耐磨性仅提高1~2倍。因此,为提高材料的时磨&l;/p&g; &l;palign=&quo;jusify&quo;&g;性还必须改变其成分。&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/1601110886(1).png&quo;syle=&quo;widh:612px;heigh:419px;&quo;/&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;式中c——含粒浓度(克/米3)&l;/p&g; &l;palign=&quo;jusify&quo;&g;&dela;——叶片厚度(米);&l;/p&g; &l;palign=&quo;jusify&quo;&g;u——叶片平均圆周速度(米/秒)。&l;/p&g; &l;palign=&quo;jusify&quo;&g;g——重力加速度,9=9.81米/秒2&l;/p&g; &l;palign=&quo;jusify&quo;&g;此关系是由径向直板式排粉风机的实际调查和实验得出的。从此关系中可知,风机的&l;/p&g; &l;palign=&quo;jusify&quo;&g;磨损与输送气体中含微粒的浓度成正比。&l;/p&g; &l;palign=&quo;jusify&quo;&g;(大)微粒性质&l;/p&g; &l;palign=&quo;jusify&quo;&g;我们知道,风机的磨损是由微粒对金属的撞击和擦伤两个作用构成的。徵粒对钢磨损&l;/p&g; &l;palign=&quo;jusify&quo;&g;不仅取决于钢的硬度,而且还与微粒的几何形状有关。大家知道,具有棱锥或其它刃尖的&l;/p&g; &l;palign=&quo;jusify&quo;&g;凸形表面的物体,就比具有球形表面的物体对金属的磨损严重。&l;/p&g; &l;palign=&quo;jusify&quo;&g;微粒的硬度和形状主要取决于它的成分。在煤和煤灰中,sio2的含量对磨损起着十分&l;/p&g; &l;palign=&quo;jusify&quo;&g;重要的作用。&l;/p&g; &l;palign=&quo;jusify&quo;&g;据资料介绍,我国大部分煤种灰分中的sio:含量均在40%以上,且多数是在50~60%之&l;/p&g; &l;palign=&quo;jusify&quo;&g;间。从调查的燃媒电厂来看,目前燃煤的灰分多在25%以上,由此推算我国电厂目前燃煤&l;/p&g; &l;palign=&quo;jusify&quo;&g;的sio2含量大多在12~15%以上,这就是目前排粉风机磨损快的重要原因之一。值得注意&l;/p&g; &l;palign=&quo;jusify&quo;&g;的是,随着我国动力事业的发展,今后燃用的煤质下降,媒中灰分将进一步增高,如第&l;/p&g; &l;palign=&quo;jusify&quo;&g;台935吨/时锅炉设计煤种的灰分为a&l;sup&g;c&l;/sup&g;=37.5%,发热量为q&l;sup&g;p&l;/sup&g;&l;sub&g;h&l;/sub&g;=3898大卡/公斤。因此,&l;/p&g; &l;palign=&quo;jusify&quo;&g;防磨措施的研究今后更应当得到重视和加强。&l;/p&g; &l;palign=&quo;jusify&quo;&g;(七)微粒粒度&l;/p&g; &l;palign=&quo;jusify&quo;&g;磨耗量与微粒的尺寸大小成正比,但当粒度在50~100微米以上时,磨耗量不再增加而趋于一定值。&l;/p&g; &l;palign=&quo;jusify&quo;&g;在排粉风机和引风机中,微粒的尺寸均小于上述定值,故其磨耗量与嬿粉或媒灰的大&l;/p&g; &l;palign=&quo;jusify&quo;&g;小成正比。在锅炉超出力运行时,如果煤粉细度变粗,飞灰可燃物增加,则将使排粉风机&l;/p&g; &l;palign=&quo;jusify&quo;&g;和引风机的磨损加剧。&l;/p&g; &l;palign=&quo;jusify&quo;&g;灰粒对风机运行寿命的影响,曾在两台锅炉上进行了测定,其结果是:灰粒大约40%&l;/p&g; &l;palign=&quo;jusify&quo;&g;大于45微米者,运行寿命为2500小时;灰粒大约6~8%大于45徽米者,运行寿命为3200&l;/p&g; &l;palign=&quo;jusify&quo;&g;小时。可见大颗粒对风机的运行寿命起着重要影响。&l;/p&g; &l;palign=&quo;jusify&quo;&g;另外,机翼型风机由于其风压系数h较低,叶轮直径较大,圆周速度较高,其磨损程&l;/p&g; &l;palign=&quo;jusify&quo;&g;度较低效风机为大。同时由于机翼型空心叶片,磨穿后灰粒即进入叶片空腔内和粘在非t&l;/p&g; &l;palign=&quo;jusify&quo;&g;作面上的飞灰,在运行中不均匀地落下,这些都将引起叶轮平衡的破坏,发生振动。高效&l;/p&g; &l;palign=&quo;jusify&quo;&g;机翼型风机转速高(n=980或1450转/分)、叶片数目少,在同样不平衡条件下,更容易发&l;/p&g; &l;palign=&quo;jusify&quo;&g;生振动。风机振动严重时将被迫停炉,甚至风机轴承座及主轴遭到破坏。总之,磨损与流&l;/p&g; &l;palign=&quo;jusify&quo;&g;体的性质、流动工况(流速、素流或层流、压力、温度等)有关,也与风机的形式、尺寸&l;/p&g; &l;palign=&quo;jusify&quo;&g;材质、转速等有关。&l;/p&g;

&l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;一)改进除尘器&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;1.水膜式除尘器调整与改进&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;水膜式除尘器必须建立稳定的水膜,才能保证正常运行。为此可采取以下的措施:&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(1)每次检修时,对喷咀进行调整,保证水流畅通,射水角度合适,使射水和壁面&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;相切而不飞溅。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(2)保持稳定的水压。水压太大或太小对形成正常水膜都有影响。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(3)各相邻喷咀都不缺水,使水膜完整。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(4)保持水源清洁,防止喷&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-family:宋体;fon-size:16px;ex-align:jusify;&quo;&g;咀&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;堵塞。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(5)瓷砖若有掉落或不平整,检修时及时更换。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(6)环形喷水装防水罩。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(7)消除漏风。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;很多单位采用上述措施后,水膜除尘器运行都比较正常。但要提高水膜式除尘器的效&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;率还必须对水膜式除尘器作进一步改进。例如某电厂改进了水膜式除尘器顶部结构,&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;加装&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;了屋檐、裙边,采用防腐喷咀等一系列措施,结果使用效果很好;有的电厂改进了&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;除尘器&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;水封装置,原为重锤式水封装置,除尘器放灰时,经常由于底部漏风而破坏除尘&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;效率,现&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;改为“落地式&dquo;水對装置,放灰时保持水封,使除尘器底部不漏风,保证了除尘&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;器的效率，&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;有的电厂将原有水膜式除尘器加高1.2米,并减轻了除尘器的负荷,使除尘&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;器效率相应提&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;高等等。总之,通过维护与改进,可使水膜式除尘器的效率进一步提高。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;2.干式多管除尘器&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;加强对干式多管除尘器的维修工作是提高除尘效果的主要方法之一。因为烟气中的飞&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;灰,会磨损除尘器的各部件(如导向板、消旋片、旋风筒、顶板等),引起各部件变形及&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;烟&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;气串流现象,从而大大降低了除尘效果,使引风机磨损严重。如果检修时发现除尘器&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;部件&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;有磨损或串流现象,应及时更换修复。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;为了使干式多管除尘器在使用中达到预期效果,还得注意以下几点:&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(1)多管式除尘器底部加装水封冲灰装置&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;针对多管式或百叶窗式除尘器在放灰时,由于&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;底部风、锁气器不严等,造成除尘器&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;效率下降的现象,将锁气器重锤装置改为水封冲灰&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;装置,消除了漏风,从而保证了除尘器&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;可靠运行。如某电厂多管式除尘器,原底部套用&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;水膜式除尘器的底部水封装置(见图5-18&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;),运行中经常出现堵塞现象。后改用下灰管&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;及水封冲灰装貴(见图5-18b),运行效果良&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;好。又如某电厂将九台煤锅炉的除尘器底部&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;重锤放灰装量全部改为水封冲灰装量,几年&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;来运行一直很好。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/微信图片_20200926170448.png&quo;syle=&quo;widh:868px;heigh:478px;&quo;/&g;&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(2)锅炉排烟温度不能过低,否则容易造成空气预热器、除尘器堵灰,而影响锅炉&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;出力及除尘效果。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(3)多管式除尘器的旋风子、排烟管、导向器、消旋装置等制造要精确,各组尽可&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;能大&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;小一致,相互配合间隙越小越好,内壁要求光滑,以提高除尘效果。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(4)多管式除尘器的旋风子采用陶瓷材料&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;某电厂采用陶瓷的锥体代替铸铁旋风子下部锥体,运行实践证明,防磨比较有效。若&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;将&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;旋风子的进出口部分均改为陶瓷材料,可进一步延长除尘器的使用寿命。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;3.采用新式高效除尘器,如漫式文丘里、大旋风子(900-c型),布袋式及电气除尘&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;器等&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;可得到更好的效果,这些除尘器运行效率可达90~95%以上。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;二)采用石或钟铁衬板防止上机尧损&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;目前国内外采用诗石作为防磨衬板,已取得显著的效果。链石硬度和时磨性能好、通&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;常比金属高几倍以至几十倍。采用铸石代替钢材,可减少因磨损而造成的金属损耗。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;如某&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;电厂原引风机机壳运行不到半年就被磨穿,焊补工作量大,不仅威胁锅炉安全运&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;行,而且&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;影响环境卫生;采用了铸铁村板后,运行两年多来,尚未发现机壳磨损。若采用&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-family:宋体;fon-size:16px;ex-align:jusify;&quo;&g;铸&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;石衬板,使用寿命会更长。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;三)叶片渗碳&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;渗碳的目的是为了使金属表面形成硬而耐磨的碳化铁层,同时保持钢材内部柔韧性。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;由于钢材在组织状态呈奥氏体时吸收碳的能力最强,因此在渗碳过程中,必须把叶片加&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;热&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;到能使内部组织转变为奥氏体所要的温度。但渗碳温度过高易引起晶粒变大和表面&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;层含&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;碳过高而出现跪性,致使叶片容易产生裂纹,因此一般控制加热温度在900℃左&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;右。渗碳&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;层越深,防磨效果越好,但脆性也越大,叶片易断裂。因此,具体渗碳多厚及部&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;位,要看&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;叶片的厚度和磨损情况及渗碳工艺来决定。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;如某厂广对引风机叶片进行滲碳处理后,叶片表面硬度可达到洛氏硬度50以上,磨损速&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;度由过去每月1毫米减少到0.1毫米,使用寿命延长10倍。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(四)障低风机转速&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;在改进或新设计引风机时合理选择转速,是提高风机耐磨性的一个有效措施。如某厂&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;引风机(原为瑞典mmbr型风机),转速为80转/分,平均运行70天就需焊补或挖补叶片;&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;后来改为5-29型风机,将转速降至730转/分(直径由1800毫米增至2230毫米)后,运行了&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;五个多月才焊补叶片,基本上符合磨损与转速的平方成正比的规律。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;大家知道,风机的转速是由锅炉所需的风量、风压和风机本身特性所决定的,要降低&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;风机转速就要选用低比转数的风机。近年来低比转数风机出现不少&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(五)风机防磨方面的其它措施&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(1)在风机易磨损的叶片部位,喷镄硬质合金(如三氧化二铝、铁铬硼硅、碳化钨等);&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(2)一般叶片表面磨损都在工作面,因此可在叶片工作面上雄焊硬质合金(如t-590&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;合金钢,高碳铬锰钢等硬质合金);&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(3)空心叶片内部充填塑性材料;在直板型叶片工作面上嵌锒或粘结刚玉；&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(4)将机翼型叶片的头、尾部制成实心对轮毂及后盘局部易磨区加保护板;采用&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;16锰钢作叶片材料;增加叶片厚度;&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(5)选择合理的叶型以减少积灰和振动,如采用双凸弧面叶型的4-73型风机作引风&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;机,则比其它机翼型风机为好;&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(6)采用5-48及6-30等后弯直板型叶片来代替机翼型;&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(7)焊突起横条小铁块(或圆钢).&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;为了增强排粉风机和引风机叶片的防磨性能,可在叶片工作面上沿轴向加装突起横条&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;,因而在工作面上形成一空气垫,不少广使用后寿命延长1~2倍。在叶片&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;工作面上加装错列的突起小块,也能起到防磨的作用。为了减少制造工作量,&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;突起的横条或突起的错列小块有些厂改用φ10毫米的圆钢.&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(8)采用前弯式叶轮,可以在相同的参数下,降低其转速;&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(9)加强燃烧调整,改善煤粉细度,降低飞灰可燃物,减轻引风机磨损；&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(10)采用双引风机。这种风机可以降低固体微粒由于分离作用而产生浓聚程度。&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;关于风机的耐磨问题,很多厂做了大量工作,积累了许多经验。例如,有的在烟气净&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;化&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;方面提高了现有除尘器的效率,有的在叶片的易磨损部位堆焊或喷镀一层硬质合金磨&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;材料;有的对除尘器加强日常维护管理;有的保证除尘器捡修质量,使除尘效率有所提&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;高,&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;相应地减轻了风机磨损;有的加强燃烧调整,改善煤粉细度,降低飞灰可燃物:有的&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;在改&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;造风机或选型上做了大量工作;有的在改进新型高效率除尘器下功夫等等,从而減&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;jusify&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;少了引风机&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;的磨损,大大延长了引风机的使用寿命。&l;/span&g;&l;/span&g;&l;/p&g;

&l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;1）如果计的风机为双吸,而选择的风机无因次特性曲线却为单吸,计算风机的比转数ns、和利用公式计算叶轮外径d2时,式中的流量q,应以风机总风量的1/2代入；而风机所需的轴功率则为计算轴功率的2倍。如果设计的风机为双吸,所选的风机无因次特性曲线也为双吸时,则q直接以总风量代入计算即可。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;2）选用新风机的设计工况,必须对应效率曲线的最高点或稍偏右,但不应低于最高效率的90%。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;3）风机的设计风量、风压选择不当,则会影响风机的运行数率。如果裕量过大,实际运行偏离设计值较远,将导致高效风机低效运行。如果风量、风压不足,则影响锅炉的出力。除对锅炉在最大负荷下进行测定外,还需对锅炉的风、烟量及阻力进行理论计算。测定值与计算值之间的误差应不超过5%。风机设计的风量、风压宜以测定值为基础。同时考虑燃烧调整的需要,以及风机制造、安装的允许误差。因此,风机设计一般保持5~10%的风量裕量,10~15%的风压裕量。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;4）所选用的新风机应考虑充分利用原有设备、适合现场制作安装及安全运行等问题。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;5）风机设计参数确定后,按其比转数ns选揮效率较高、调节性能较好的风机形式。同时对本厂设备的统一和制造、维修方便也须适当考虑。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;6）正确应用风机空气动力学图。在确定风机形式时,除应仔细计算外,还需核对其空气动力学图和无因次特性曲线。如果按全压系数和流量系数两公式分别算出的风机叶轮直径d2相差较大,则可能是计算或査曲线有错误,或特性曲线本身存在错误,应査明原因再继续设计。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(7)当选出的风机有多种型号时,可选择效率最高、制作工艺简单、且d2又小的一种风机型号。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(8)当采用新型离心高效风机的圆周速度u&l;sub&g;2&l;/sub&g;大于100米/秒时,必须进行强度核算。若前、后盘强度不足时,可采用加筋补强等方法来增加叶轮强度。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(9)如果选定的新型风机的叶轮直径较原有风机的叶轮直径偏大很多时,为了利用原有电动机、轴、轴承及支座等,必须对电动机启动时间、风机原有部件的强度及轴的临界转速等进行核算。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(10)如果按初定转速选不上时,可提高或降低转速来选。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(11)如果选不上较满意的标准型(定型)风机型号时,则可按修正叶轮、机壳宽度的办法来解决。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(12)选型计算中,计入进气箱及导向器阻力,以保证设计要求;而国内所选辑的空气动力学图,大部分为“自由进气&dquo;状态。即在进口仅有集流器、而无进气箱及导向器条件下测得的无因次特性曲线。而实际情况一般均装有进气箱及导向器。&l;/span&g;&l;/span&g;&l;/p&g;

&l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;一、风机的设计方法&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;风机的设计有两种方法。一种方法是用基本理论换算出设计工况点的近似值,再用模&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;型试验加以验证。这种方法适合于制造及科研单位设计新型风机时采用。若电厂有条件&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;或在其它单位协助下亦可采用。另一种方法是根据模型试验已得出的空气动力学图和无因&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;次特性曲线,应用相似理论进行选型设计。这种方法在电厂已广泛采用。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;由第二章第大节所述相似理论可知,几何相似的同一形式的风机,尽管风机的尺寸大&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;小不同,但它们的空气动力学图和无因次特性曲线却是相同的。因此,应用相似理论来设&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;计风机,只要从已有的风机资料(各类型风机的空气动力学图和它们的无因次特性曲线)&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;中,选出满足设计要求、性能良好、制造简便的风机即可。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;二、合理选择风机的工作点&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;风机的工作点是指系统阻力特性曲线(q-∑h曲线)和风机本身的性能曲线(q-h曲线)的交点,如图3-1中1点和2点。在实际运行中,工作点一般在最高效率值&ea;max的0.9(即&ea;≥0.9max)以上范围内;而设计工作点则应接近于最高效率点。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;因此,风机的设计流量q必须由对锅炉实际所带负荷情况的分析,确定其常带负荷及经常可能变动范围,同时根据实际过剩空气系数、煤种等进行计算求得。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;风压应由实测烟、风道的阻力求得。如果同时要进行烟、风道的改进,没有条件测定改进后的具体数值,则应对改进前的实测数字和改进计算进行具体的分析,使其尽可能地符合实际情况。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;如果工作点选择不当,则高效风机不高效,增加损失,浪费厂用电。现分析如下&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;1.对于烟道中用挡板调节的引风机&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(1)设风量选择正确,风压选择过大,a点的风量、阻力为系统实际风量、阻力，b点为挡板全开时的工作点(见图32)。显然在b点工作时,风机产生的风量,风压过大，必须关小系统挡板,増加节流,改变系统特性,使工作点由b点移到a&quo;点。由图可知a&quo;能量损失掉了,但风机工作点仍可保持在设计效率值。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/xingnengdian(1).png&quo;syle=&quo;widh:945px;heigh:365px;&quo;/&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(2)设风量、风压都选择过大,a&quo;&squo;为系统实际要求的工作点(见图3-2)。则系统挡板还要进一步关小,使工作点移到a&quo;,此时不但a&quo;a&quo;&squo;能量浪费掉了,风机效率也下降了。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;2.对于用导向器调节的送风机&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;导向器调节是利用导向器改变风机本身的特性达到调节的目的。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/调节门开度效率展示(1).png&quo;syle=&quo;widh:993px;heigh:582px;&quo;/&g;&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(1)设风量选择合适、风压过大。从图3-3可知,当导向器全开(100%)时,风机工作点在a点,风量、风压都过大,此时必须关小导向器开度到50%,工作点移到b点,才能符合实际风量、风压的要求。在设计流量q时,导向器全开,风机效率为90%:当导向器开50%时,则风机效率只有67.5%。可见,若工作点选择不当,风机实际效率会大大降低。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(2)设风量选择合适、风压过低。从图3-4可知,当设计流量q时,导向器全开,风机产生的全压h不足于克服系统阻力∑h。要满足风压要求,只能使实际流景下降到q',风机只能在a点工作,锅炉出力被迫降低,风机的效率也降低。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;3由于制造工艺过程的问题引起风机特性的变化&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;在选择&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-family:宋体;fon-size:16px;&quo;&g;风&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;机时,是根据所选风机的型号,由风机空气动力学图,用无因次特性计算在最佳效率下风机应有的外径d&l;sub&g;2&l;/sub&g;和其它尺寸。但常发生由于制造工艺问题而使风机结构不符合设计要求,实际风机的特性曲线与模型风机的特性曲线发生差异,使风机处于低效率下工作。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;4,风机选型不当&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;近几年来,风机效率为80~90%以上的高效风机已很多,这些风机除了空气动力效率都较高的相同特点外,还有性能、结构等方面的差异。在选型时,如果不具体分析各种形式风机性能特点及对本锅炉平时所带负荷的适应范围,只单纯求设计效率高的型号,往往会造成出力经常变动的锅炉选择了调节性差(高效区较窄)的风机,使风机经常处于高效率区外运行。&l;/span&g;&l;/span&g;&l;/p&g;

&l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;一、选型前要搜的原始资料&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;(1)风、烟量的确定,最好在锅炉额定负荷时进行实际测定。新设计锅炉的送、引风机,可用理论计算方法求得,其过剩空气系数必须实测确定或参考其它资料。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;(2)送、引风机的风压必须通过实测,然后求其全压。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;(3)风、烟温度应选用平时运行中的最高温度,在选用前必须经过实际测量或查过去的运行记录。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;(4)实测原有送、引风机的叶轮外径(可测备品)或进一步核对图纸。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;(5)査对原有电动机的转速和容量(如果仍利用原有电动机时)。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;(6)在实测原有风机的风量、风压时,应测定一下原有风机的运行效率,以便作经济比较。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;(7)根据原有风机历年来的运行情况和存在问题,对以上原始数值(包括锅炉出力)进行分析和多方面的考核,最后确定风机的没计参数,以避免采用新型风机时所选用的风量、风压不能满足锅炉实际运行的需要。但也要防止过大的富裕量,致使风机长期处在不经济的低效率区运行。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;二、设计参数的选择与计算&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;在风机选型设计时,首先需要确定所需的流量q、全压h及转速n和介质温度。设计风量、风压的确定可以采用理论计算方法,也可以采用实测的方法,对于现有风机的改造,通常采用实测的方法。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;下面分别介绍风量、风压的实测方法和计算方法。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第二节1.png&quo;syle=&quo;widh:1106px;heigh:566px;&quo;/&g;&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;&l;song&g;k——系数，（一般取1.7-2.0）。该系数可通过试验取得。&l;/song&g;&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;&l;song&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第二节2.png&quo;syle=&quo;widh:1105px;heigh:912px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第二节3.png&quo;syle=&quo;widh:1038px;heigh:555px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第二节4.png&quo;syle=&quo;widh:1067px;heigh:871px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第二节5.png&quo;syle=&quo;widh:1036px;heigh:627px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第二节6.png&quo;syle=&quo;widh:1070px;heigh:627px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第二节7.png&quo;syle=&quo;widh:1091px;heigh:899px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第二节8.png&quo;syle=&quo;widh:1070px;heigh:435px;&quo;/&g;&l;/song&g;&l;/span&g;&l;/span&g;&l;/p&g;

&l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;风机选型设计时,首先根据需要的风压、风量和电动机转速计算比转数ns,由n进行风机选型。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;如果选不到合适的风机,可选用m,相差不大的风机进行变型设计,即根据实际需要的全压h求出风机叶轮直径,再根据实际需要的流量q进行叶轮宽度及机壳的修正。为了不至严重影响空气动力学特性,叶轮宽度变化率应控制在10~15%以内。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;一、变型设计方法&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;计算比转数n&l;sub&g;s&l;/sub&g;：&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第四节1.png&quo;syle=&quo;widh:1050px;heigh:862px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第四节2.png&quo;syle=&quo;widh:1027px;heigh:254px;&quo;/&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第四节3.png&quo;syle=&quo;widh:1046px;heigh:761px;&quo;/&g;&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;二、叶轮变型后的流量系数&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;变型设计后的流量系数&l;u&g;q&l;/u&g;&l;sub&g;（&l;/sub&g;&l;sub&g;q）&l;/sub&g;,可根据变型后的叶轮宽度来计算：&l;/span&g;&l;/span&g;&l;/p&g; &l;palign=&quo;cene&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/第四节4.png&quo;syle=&quo;widh:287px;heigh:78px;&quo;/&g; &l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;式中&l;u&g;q&l;/u&g;&l;sub&g;（&l;/sub&g;&l;sub&g;q）&l;/sub&g;ー叶轮直径为d2&l;sub&g;（&l;/sub&g;&l;sub&g;q&l;/sub&g;&l;sub&g;）&l;/sub&g;,叶轮宽度为变型后的宽度b2&l;sub&g;（&l;/sub&g;&l;sub&g;q&l;/sub&g;&l;sub&g;）&l;/sub&g;时的流量系数:&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;u&g;q&l;/u&g;&l;sub&g;（&l;/sub&g;&l;sub&g;h）&l;/sub&g;一叶轮直径为d2&l;sub&g;（&l;/sub&g;&l;sub&g;h）&l;/sub&g;,叶轮宽度为变型后的宽度b2&l;sub&g;（&l;/sub&g;&l;sub&g;h）&l;/sub&g;时的流量系数。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;三、改变叶片出口角&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;这种变型设计,一般按流量系数算出叶轮直径,以此直径核算风压。如果风压不能满足实际要求,则改变其叶片出口角。叶片出口角的大小,则根据比转数与压力系数和流速系数的关系曲线查出。出口角的变化范围有限,一般为30°~50°(150°~130°)。超出这一范围,会使风机效率降低。&l;/span&g;&l;/span&g;&l;/p&g; &l;p&g; &l;/p&g; &l;p&g; &l;/p&g;

&l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;  长期以来的经验指出,喘现象仅仅发生在风机的风压性能曲线中从降顶到坡度△h/&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-family:宋体;fon-size:16px;&quo;&g;△&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;q&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;为正値的区段。而通过对叶轮的空气动力工况的分析表明,风压的降低是由于旋转脱流造&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;成的,脱流现象出观在整个不定工况区,而风压性能曲线中坡度△h/&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-family:宋体;fon-size:16px;&quo;&g;△&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;q为正值的区段就在&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;这个不稳定工况区内。因此旋转脱流与喘振是密切相关的,可以说前者的存在是后者得以&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;发生的原因。&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/l4-72-6c.jpg&quo;syle=&quo;widh:1024px;heigh:768px;&quo;/&g;&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;但从其本质来看,旋转脱流与喘振是两种不同的概念,它们之间存在着重要的区别：&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(1)旋转脱流是叶片结枃特性造成的一种空气动力现象,它的一些基本特性,例如&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;脱流区的旋转速度、脱流的起始点、消失点等,都有它自己的规律,不受风道系统的容积&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;和形状的影响。&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;喘振是风机与风道系统耦合后振荡特性的一种表现形式,它的振幅、频率等基本特性&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;受风道容积的支配。&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(2)旋转脱流是轴流式和离心式空气压缩机械的一个基本属性,每个叶轮都有其发&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;生旋转脱流的不稳定工况区。但是,它是一种隐性的现象,只有用高灵敏度的测试仪器オ&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;能探测到。&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;喘振是显性的现象。当发生喘振时,风量、风压和功率的脉动,以及伴随而来的音响&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;一般是很明显的,有时甚至非常剧烈。但喘振的发生要有一定的条件,同一台风机装于不&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;同的系统中,有的发生喘振,有的就不发生喘振。&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;（3)旋转脱流出现时,尽管叶轮附近的工况有波动,但整台风机的风量、风压基本&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;上是稳定的,还可以维持运行。&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;在喘振发生时,由于风量、风压的大幅度波动,风机已无法维持正常运行。&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;(4)在出现旋转脱流时,风机的性能曲线还可以测得。而在喘振情况下、由于工况&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;的大幅度波动,正常的测量工作已无法进行。&l;/span&g;&l;/span&g;&l;/div&g;

&l;div&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;  高压风机一般是指全压值h20&g;300毫米水柱的风机(进风口工质为标准状况下的空气,&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;即&l;/span&g;&l;sub&g;20&l;/sub&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;=1.2公斤/米3)。多&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;数锅炉的送风机和制粉系统的排粉风机是属于此类风机。高压风机的无因次参数需要进行修正,即风机全压h需修&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;正为“折算全压&dquo;h*,而标准状况下的&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;风机全压h&l;/span&g;&l;sub&g;20&l;/sub&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;也需修正为标准状况下的“折算全压&dquo;h*&l;/span&g;&l;sub&g;20&l;/sub&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;:&l;/span&g;&l;/p&g; &l;div&g;&l;spansyle=&quo;fon-size:13px;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/压力修正.png&quo;syle=&quo;widh:768px;heigh:783px;&quo;/&g;&l;/span&g;&l;/div&g; &l;div&g; &l;div&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;  &l;/span&g;&l;/span&g;&l;/div&g; &l;div&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;  因此,进行高压风机的选型计算时,首先按给定的h及h1求得μ,从而确定&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;h*&l;/span&g;&l;sub&g;20&l;/sub&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;。值用以计算ns,其它步骤则与常&l;/span&g;&l;/span&g;&l;/div&g; &l;div&g; &l;/div&g; &l;div&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;规方&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;法&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;相&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;同。&l;/span&g;&l;/span&g;&l;spansyle=&quo;fon-family:宋体;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;所有风机的空气动力学图和无因次特性曲线均适用于高压风机。&l;/span&g;&l;/span&g;&l;/div&g; &l;/div&g; &l;/div&g;

&l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机是大型的旋转机械，振动是风机设备运行是否正常的一个主要指标。振动如果超过相关标准的要求，就说明风机工作是不正常的，需要查找原因并消除安全隐患。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;大型的风机设备一般都配置有轴承测振装置，在中控室中可以实时监测风机的振动情况。振动大也是风机常见的运行问题，下面就介绍典型的故障以及判断方法。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;动平衡问题&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转子不平衡而引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频率主要在一倍频，一倍频的振动占通频的一半以上。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动稳定，相位稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动对负荷不敏感&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动随转速的增加而增大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转子动平衡造成的振动大的典型频谱见下图：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/转子频谱.png&quo;syle=&quo;widh:579px;heigh:344px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;造成转子动不平衡的原因主要有：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:cicle;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转子结垢&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;不均匀积灰&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;不均匀磨损、腐蚀等&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;叶轮零件松动或者脱落&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;ex-inden:-21p;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;叶片裂纹&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转子不对中&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转子不对中引起的振动特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动以二倍频为主，常伴有一倍频和三倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;轴向振动也较大，以二倍频为主，伴有一倍频和三倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动随负荷增大而增大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;轴承如果不对中，径向振动较大，而且振动不稳定。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转子不对中造成的振动大的典型频谱见下图：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/不对中频谱.jpg&quo;syle=&quo;widh:592px;heigh:349px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;主轴弯曲&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于主轴弯曲而引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频率主要在一倍频，常伴有二倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动稳定，相位稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于主轴弯曲造成的振动大的典型频谱如下图：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/主轴弯曲.jpg&quo;syle=&quo;widh:592px;heigh:349px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转动&l;/span&g;&l;/song&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;部件与静态&l;/span&g;&l;/song&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;件摩擦&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于转动部件与静态件摩擦引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频率为高次谐波、低次谐波以及组合频率，常伴有一倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动不稳定，相位不稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动为自激振动，与转速无关。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转动部件与静态件摩擦集流器与叶轮进口摩擦、叶轮与机壳摩擦、主轴与轴封摩擦、刹车片与刹车盘的摩擦等。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; 由于摩擦情况的不同，实际振动的表现也千差万别，应该根据上面的典型特征综合分析判断。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;基础刚度不够或者基础与底座连接松动&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于基础刚度不够或者基础与底座连接松动引起的振动的特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;出现3到10倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大，尤其是垂直方向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;有时出现基础频率分数谐波，比如1/2、3/2等频率&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动不稳定，相位不稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;轴向振动正常。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于本原因造成的振动大的典型频谱见下图：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/安装基础宋工.jpg&quo;syle=&quo;widh:592px;heigh:349px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于松动造成的振动一个特征是振动的非线性，存在奇次谐波；另一个特征是在松动方向上的振动，大多数表现为垂直和轴向的振动。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机失速&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于失速引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频率为组合频率&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动大幅度增加且波动，相位不稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机的噪音大大增加&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;有可能出现风量减小、电机电流减小等现象。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机的工作点如果位于下图所示的区域共作，风机就可能发生失速，因此风机的工作区域应避开下图的失速区域。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/时速.jpg&quo;syle=&quo;widh:664px;heigh:521px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-weigh:700;lee-spacing:nomal;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机的设计问题&l;/span&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机在设计的时候，如果没有避开风机的自然频率，风机会发生共振，进而造成风机振动大。风机&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;共振是指风机所受激励的频率与风机的某阶固有频率相接近时，系统振幅显著增大的现象。&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;通常下共振是有害的，会引起机械结构很大的变形和动态应力，甚至造成破坏性事故。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;在实际运行过程中，由于风机共振造成的振动是最难发现的，隐患也是最大的。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,0,0);fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;处理风机的振动问题是比较复杂的，只要掌握不同振动的原因和基本特征，加上平时的经验积累，就能够通过各种分析判断并找到风机产生振动故障的原因，并采取针对性的措施，进而提高风机的安全可靠性，为企业的正常生产贡献应有的力量。&l;/span&g;&l;/p&g;

&l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;   随着我国工业现代化的发展，大型旋转设备的应用越来越广泛，从钢铁、煤炭、电力、水泥，到地铁、飞机、火车、船舶等，都离不开旋转设备的身影，比如泵与风机、汽轮机、燃气轮机、涡轮机、飞机发动机等等，这些旋转设备的稳定运行对国民经济的发展越来越重要，一旦发生故障，都可能导致生产线停机，造成的损失是非常大的。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动的监测与诊断对提高旋转设备的稳定运行有很重要的作用，建立在现代故障诊断技术的监测与诊断系统，可以实时监测设备的运行状态，通过对数据的处理与分析，可以发现设备故障的额原因以及预测设备可能的故障，为预防事故、科学安排检修提供科学的依据。&l;/span&g;&l;/secion&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:nomal;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:nomal;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box;wod-wap:beak-wod!impoan;ex-inden:-21p;oveflow-wap:beak-wod;fon-vaian-numeic:nomal;colo:gb(0,128,255);lee-spacing:0.48px;fon-family:等线;fon-size:20px;fon-weigh:700;&quo;&g;□1&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:14p;ex-inden:-21p;&quo;&g; &l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box;wod-wap:beak-wod!impoan;ex-inden:-21p;oveflow-wap:beak-wod;fon-vaian-numeic:nomal;colo:gb(0,128,255);lee-spacing:0.48px;fon-family:等线;fon-size:20px;fon-weigh:700;&quo;&g;振动的分类&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:nomal;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;按振动规律分类：&l;/span&g;&l;/p&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;按振动的规律，机械振动可以分为下面的几类。&l;/span&g;&l;/secion&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/风量1.jpg&quo;syle=&quo;widh:560px;heigh:335px;&quo;/&g;&l;/p&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;按振动频率分类：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;根据振动频率的高低，振动可以分为三类：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;低频振动：频率&l;10hz&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;中频振动：10hz&l;频率&l;1000hz&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;高频振动：频率&g;1000hz&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-inden:-21p;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-vaian-numeic:nomal;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;□2 &l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-vaian-numeic:nomal;fon-weigh:700;lee-spacing:0.48px;&quo;&g;振动信号的物理量&l;/span&g;&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动的三个基本因素是振幅s、频率f和相位φ。通常&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;简&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;谐振动可以采用下面的函数来表示：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:cene;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-align:lef;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;s=asin(2π/t  φ) &l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:14px;line-heigh:21px;fon-family:等线;&quo;&g;            &l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;其中:&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;a：最大振幅（μm或者mm）,或者称为峰值&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;：时间（s）&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;t：周期（s）&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;φ：相位（ad）&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振幅s可以反映振动的强度。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:16px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;如果用振速v来表示：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:16px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;v=ω&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;ω为角速度，&l;/span&g;&l;spansyle=&quo;fon-family:&quo;timesnewroman&quo;;fon-size:16px;lee-spacing:0.544px;&quo;&g;ω=2π/t&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;通常以速度均方根值来表示振速，它最能反应振动的烈度，目前许多标准都是采用速度均方根值&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:14px;line-heigh:21px;fon-family:宋体;&quo;&g;v&l;subsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;ms&l;/sub&g;&l;/span&g;作为判别的参数,它与速度最大值&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:14px;line-heigh:21px;fon-family:宋体;&quo;&g;v&l;subsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;p&l;/sub&g;&l;/span&g;的关系：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:cene;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-align:lef;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:14px;line-heigh:21px;fon-family:宋体;&quo;&g;v&l;subsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;ms&l;/sub&g;&l;/span&g;=0.707&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:14px;line-heigh:21px;fon-family:宋体;&quo;&g;v&l;subsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;p&l;/sub&g;&l;/span&g;&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;频率f表示物体每秒钟振动的次数，单位为hz。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:cene;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;fon-family:&quo;timesnewroman&quo;;fon-size:16px;lee-spacing:0.544px;&quo;&g;f=ω/2π&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;频率是振动诊断的一个重要参数，是判断设备故障类型的主要依据。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:12p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;相位角φ:表示振动的相对位置，不同振动源产生的振动都有各自的相位，相位相同的振动会引起共振，产生严重的后果；相位相反的振动会互相抵消，起到减振的效果。相位测量分析在故障诊断中也有相当重要的地位。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;□&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;3振动的测量&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动的测量一般是测量振动体的位移、速度、加速度的大小，以及振动频率、周期、相位、振型、频谱等。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;emsyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:14p;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振幅的测量：&l;/span&g;&l;/song&g;&l;/em&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-inden:0p;fon-size:12p;lee-spacing:0.544px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;机械工程中一般采用速度传&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-inden:0p;fon-size:12p;lee-spacing:0.544px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;感&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-inden:0p;fon-size:12p;lee-spacing:0.544px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;器或者加速度传感器来测量机械振动。通常，对于低频振动，主要测量的振幅是位移量；对于中频振动，主要测量的振幅是速度量；对于高频振动，主要测量的振幅是加速度。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;速度传感器和加速度传感器都是接触式传感器，直接安装在设备的测量点；涡流式传感器是非接触式传感器，它结构简单，线性度好，抗干扰能力强，广泛应用&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;&quo;&g;于&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;不接触式振动位移测量。&l;/span&g;&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;速度传感器适用于测量轴承座、壳体以及基础的一般频带内的振动速度和振动位移。加速度传感器适用于测量轴承座、壳体等的绝对运动。电涡流位移传感器适合于测量转子相对于轴承的相对位移，包括轴心平均位置及振动位移；它还可以测出转轴轴心静态位置的偏离，这个用于判断轴心是否偏移很有好处。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;emsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;频率的测量：&l;/span&g;&l;/song&g;&l;/em&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;频率的测量一般采用频谱分析仪直接测量。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;总之，传感器的选用以及测试对象和测试部位的选择应当符合该部位的振动最能反映出测试对象的特点。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;旋转设备的测试内容根据不同的目的，大概有以下几方面：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;1)运&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;行中旋转设备的振动监测与保护。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;2)流体压力、流量、温度的监测与保护。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;3)轴承温度的监测与保护。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;4)转子动平衡。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;□&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;4振动信号的处理与分析&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;机械振动测量的信号中包含对诊断有用的信息，但是也有一些没用的信息，为了提取有用的信息，就必须对信号进行处理。信号处理是设备诊断中不可缺少的重要手段。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动信号的分析方法，可按信号处理方式的不同分为幅域分析、时域分析、频域分析。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;幅域分析是比较原始的一种分析方法，它只在波形的幅值上进行，比如计算波形的最大值、最小值、平均值、有效值等。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;时域分析是研究信号在时间域内的变化或者分布。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;频域分析是确定信号的频域结构，即信号中包含哪些频率成分，分析的结果是以频率为自变量的各种物理量的谱线或者曲线。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;不同的分析方法是从不同的角度观察、分析信号，使信号处理的结果更加丰富。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:16px;&quo;&g;&l;emsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-weigh:bold;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动信号的时域分析：&l;/span&g;&l;/em&g;&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动信号的时域分析主要是指波形分析、轴心轨迹、相关分析和时序分析，他们可以在时域中提取信号的特征。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;波形分析：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;传感器输出的信号一般都是时间波形，对于具有明显特征的波形，可以用来判断设备的故障。例如，等距离的尖脉冲是冲击的特征，削波表示有摩擦，正弦波主要是不平衡。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;一般来说，正弦波一般表示不平衡故障；如下图：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/正选波.jpg&quo;syle=&quo;widh:840px;heigh:185px;&quo;/&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;单纯不对&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;中&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;的振动波形比较稳定、光滑、重复性好；如下图：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/反旋波.jpg&quo;syle=&quo;widh:292px;heigh:93px;&quo;/&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;转子组件松动或者摩擦产生的波形比较毛糙、不平滑、不稳定，还可能出现削波现象；&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;自激动振动，如油膜涡动、油膜振荡等，其波形比较杂乱，重复性差，波动大。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;轴心轨迹：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;轴心运动轨迹是利用安装在同一截面内相互垂直的两支电涡流传感器对主轴振动测量后得到的，可以用来指示轴承的磨损、轴不对中、轴不平衡、轴承润滑失稳以及轴摩擦等。轴心轨迹非常直观地显示了转子在轴承中的旋转和振动情况，是设备故障振动中的重要特征信息。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;正常情况下，轴心轨迹是稳定的，旋转过程中，轴轨迹基本上相互重合。如果轴心轨迹紊乱，形状、大小不断变化，则表示转子运转不稳定，如果不及时检查控制，很容易导致转子失稳，酿成大事故。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;ex-decoaion-line:undeline;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;启停机过程：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;通常将设备启停机过程的振动信号称为瞬态信号，是转子系统对转速变化的响应，是转子动态特性和故障征兆的反映。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;用于启停过程的分析方法很多，除了轴心轨迹、轴心位置和相位分析以外，主要通过奈魁斯特图、波德图和瀑布图来分析启停过程的特性。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;奈魁斯特图是将在启停过程中每个转速下的基频振幅和相位用极坐标表示的一条曲线。利用奈魁斯特图，可以分析振动振幅峰值和相位偏移，能够发现转子的共振频率和临界转速，还可以看出整个转子系统对于不平衡的响应。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;波德图是将各个转速下的振幅和相位分别绘制在以转速为横坐标的坐标系上，作用与奈魁斯特图一样。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;瀑布图是将各个转速下的振动信号的幅值谱叠加而成的，纵坐标是转速，横坐标是频率。瀑布图反映了全部频率分量的振幅变化情况，但显示不了振动的相位信息。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;emsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-weigh:bold;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动信号的频域分析：&l;/span&g;&l;/em&g;&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;对于机械振动的诊断而言，时域分析只能粗略地回答设备是否有故障，但不能提供故障发生部位等信息，而频域分析能通过了解测试对象地动态特性，对设备地状态做出准确评价，进而对设备故障进行定位。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;设备故障发生时，往往会引起信号频率结构的变化，根据这些频率成分的组成和大小，就可以对故障做出识别和评价。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;频域分析是以傅里叶积分为基础，将复杂信号分解为有限或者无限个频率的简谐分量。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动分析的任务就是从频谱图上把每个频谱分量与监测设备的部件对照联系，给每条频率赋予物理的解释，主要包括：&l;/span&g;&l;/secion&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem-fon,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;振动频谱包含的频谱分量&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;每条频谱分量的幅值&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;这些频谱分量之间的关系&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;如果有高幅值的频谱分量，它的来源以及对应设备的零部件&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;如果能测相位，检查相位是否稳定&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;频谱分析可以按下面的思路进行：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;1）按高中低频率，初步了解故障发生的部位&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;2）按工频、谐波进行分析，振动信号大多数为工频的整数倍，找出他们之间的联系。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;3）按特征频谱分析。如不平衡必定产生工频，气流在叶片间流动必定有通过频率，零部件冲击有固有振动频率等。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;4）对主振幅值成分进行分析。频谱分析时，首先要关注幅值较高的频谱，如工频过高，往往是不平衡导致；二倍频过高，可能与设备不对&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;中&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;有关；0.5倍频高，预示涡动失稳；特低频是由于喘振引起的；谐波丰富可能是松动造成。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;5）通过频谱对比分析发现异常。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-size:12p;lee-spacing:0.544px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;总之，振动信号从幅域、时域和频域反映了机器的运行状态和故障的信息，通过振动分析可以识别和监测设备的运行状态，并控制或者减少振动，为设备的正常运行提供了科学的指导依据。&l;/span&g;&l;/secion&g;

&l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;从动力学的角度，转子系统一般分为刚性转子和柔性转子。转子转速低于一阶横向临界转速的转子称为刚性转子，转子转速高于一阶横向临界转速的转子称为柔性转子。比如，风机的转子一般为刚性转子，燃气轮机的转子一般为柔性转子。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;不论刚性转子还是柔性转子，在运行的时候都会出现各种各样的故障，轻者振动增大，严重的会导致转子损坏，甚至发生飞车等重大事故，因此转子的故障监测与诊断对保障旋转设备的正常运行至关重要，那么根据振动监测的信号如何来诊断转子的运行状态呢?转子的不同故障其振动的特征是不一样的，因此根据振动信号的特征可以用来诊断转子的故障。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;转子的典型故障有以下几类：&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;□1&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;.转子不平衡&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;转子不平衡是最常发生的故障，转子由于材料的质量分布、加工误差、装配因素、运行中的腐蚀或者磨损、积灰、裂纹等因素的影响，会导致其质心与旋转中心不重合，从而导致转子的不平衡，偏心距越大，动不平衡就越大，从而导致转子的振动增大。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;不平衡故障的典型特征：&l;/span&g;&l;/secion&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;一倍频比较突出。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;时域波形为正弦波。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;轴心轨迹为比较稳定的圆或者椭圆。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;振动随着转速的增大而增大。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;当转子的部件损坏时，振动会发生突然变化。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;相位稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;□&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;2主轴弯曲&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;设备停用一段时间后，会导致主轴弯曲。转子弯曲有永久性弯曲和临时性弯曲两种情况。永久性弯曲可能是由于设计制造缺陷、长期停放没有盘车等原因造成；临时性弯曲产生的原因可能为预负荷过大、升速过快等。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;主轴弯曲的故障特征：&l;/span&g;&l;/secion&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:25.5px;fon-family:宋体;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;时域波形为近似的正弦波。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;ex-inden:0p;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;轴心轨迹为一个比较稳定的圆或者椭圆。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:25.5px;fon-family:宋体;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;频谱以一倍频为主，伴有&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:25.5px;fon-family:宋体;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;高次&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:25.5px;fon-family:宋体;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;谐波成分。&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;fon-size:17px;ex-inden:0p;&quo;&g;主轴弯曲与不平衡都以一倍频为主，但主轴弯曲在轴向的振动较大。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;□&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;3.不对中&l;/span&g;&l;/secion&g; &l;psyle=&quo;magin:0p0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0em;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;不对中包括轴承不对中和轴系不对中，转子不对中会导致振动增大，引起不对中的原因：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0p0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;line-heigh:1.5em;ex-inden:0em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;设备安装过程中对&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;中&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;跳动超差。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0p0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;line-heigh:1.5em;ex-inden:0em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;高温设备的膨胀造成转轴中心线变化。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0p0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;line-heigh:1.5em;ex-inden:0em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;轴承座热膨胀不均匀。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0p0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;line-heigh:1.5em;ex-inden:0em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;机壳变形或者移位。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0p0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;line-heigh:1.5em;ex-inden:0em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;基础沉降。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0p0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;line-heigh:1.5em;ex-inden:0em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;转子发生弯曲。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;轴系不对中的典型特征：&l;/span&g;&l;/secion&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;时域波形出现2倍频的谐波。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;轴心轨迹为香蕉形或者8字形。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;频谱特征：主要表现为2倍频&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;振动随负荷增大而增大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;角度不对中时，伴随着1倍频品的轴向振动。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;secionsyle=&quo;magin:0p0px;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0em;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;不对中的特征和转子裂纹的特征类似，都是2倍频突出，区别主要是振动的稳定性，不对中的振动比较稳定。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;□&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;4.转子横向裂纹&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;转子横向裂纹的振动响应与裂纹的位置、深度、受力情况有很大的关系，因此其表现形式也是不一样的，主要的特征：&l;/span&g;&l;/secion&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;振动带有非线性性质，频谱出现一倍频、2倍频、3倍频……等高倍分量&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;随着裂纹的扩展，一倍频、2倍频、3倍频……等高倍分量的幅值逐渐增大。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;相位角发生不规则波动。&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;其&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:25.5px;fon-family:宋体;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;启&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;停机过程中，转子经过1/2、1/3……转速时，振动会有峰值&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;□&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;5.连接松动&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;松动的典型故障特征：&l;/span&g;&l;/secion&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;出现2倍频、三倍频、四倍频……等高倍频谐波&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;轴心轨迹混乱，中心漂移&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;松动方向的振幅大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;有时出现基频的分数谐波&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;fon-size:17px;ex-inden:0p;&quo;&g;如果高次谐波的振幅值大于一倍频振幅的一半时，应考虑松动的故障。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;□&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;6.动静&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;件&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;的摩擦&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;动静&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;件之间的摩擦，最开始的时候症状不明显，当摩擦发展到一定程度之后，其特征为：&l;/span&g;&l;/secion&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;时域波形存在&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:25.5px;fon-family:宋体;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;“肖&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;顶&dquo;现象&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;除了1倍频外，还有高次谐波&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;严重摩擦的时候，还会出现1/2、1/3，1/n等分频出现&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:25.5px;fon-family:宋体;&quo;&g;轴心轨迹存在尖角&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;fon-size:17px;ex-inden:0p;&quo;&g;松动和摩擦都会出现高频谐波，主要从波形图上来区分，摩擦存在肖顶波形，而松动没有肖顶现象。&l;/span&g;&l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;/secion&g; &l;secionsyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;lee-spacing:0.544px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-inden:-21p;line-heigh:1.5em;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:17px;line-heigh:25.5px;fon-family:宋体;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;□&l;/span&g;&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;7.风机失速&l;/span&g;&l;/secion&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;colo:gb(0,0,0);fon-family:等线;&quo;&g;由于失速引起的振动主要有以下特征：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;widh:577.412px;lis-syle-ype:squae;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;colo:gb(0,0,0);&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:等线;&quo;&g;振动频率为组合频率&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;colo:gb(0,0,0);&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:等线;&quo;&g;振动大幅度增加且波动，相位不稳定&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;colo:gb(0,0,0);&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:等线;&quo;&g;径向振动大&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;colo:gb(0,0,0);&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:等线;&quo;&g;存在叶片通过频率&l;/span&g;&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;colo:gb(0,0,0);fon-family:等线;&quo;&g;旋转设备的振动问题是比较复杂的，有的时候很难找到问题的根本原因，掌握不同故障的基本特征，通过各种时域分析、频域分析以及轴心轨迹等探测手段，就能够通过各种分析判断并找到旋转设备产生振动故障的原因，并采取针对性的措施，进而提高旋转设备的安全可靠性。&l;/span&g;&l;/p&g;

&l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;风机是电老虎，是国民生产中主要的耗能设备。据估计，风机的用电量占全国发电量的10%，所以风机节能在国民经济生产中占有举足轻重的地位。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;在国家节能减排的大背景下，提高风机的实际运行效率对企业完成节能降耗的目标有至关重要的作用，企业对风机实现节能有很大的需求，那么如何才能提高风机的运行效率呢?&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;colo:gb(0,82,255);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-align:lef;ex-inden:2em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机参数的设计要合理&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;由前面的分析可知，风机的裕量太大，会导致风机的效率降低，因此风机参数的设计是否合理，直接影响风机的实际运行效率，是风机节能降耗的根本。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;现在的风机技术有很大的发展，风机的性能是比较准确的，在设计风机的参数时，没有必要留太大的裕量，裕量的设计要符合适度的原则。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;另外，国家不同行业的风机都有选型设计标准，标准中都对风机参数的裕量有规定，这些行业标准一般都是几十年前制定的标准，那个时候风机的技术发展比较落后，因此标准中规定的风机参数的裕量比较大，随着风机技术的发展，标准的更新严重滞后，受标准要求的风机参数裕量的约束，导致风机的设计裕量太大，“大马拉小车“的现象比较普遍，因此标准更新的滞后严重影响了风机的节能降耗工作。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;另外，在做风机系统设计计算的时候，可以采用先进的cfd模拟技术来模拟计算系统的阻力、风量等参数，这样的计算能得到比较准确的结果，比传统的按经验系数计算的风机参数更接近实际情况。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;对于改造的风机，可以先对系统的阻力、流量进行现场测试，然后根据实际情况选定新的风机，这样新风机的运行参数就会与实际需求比较接近，从而使风机运行的效率比较高。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;colo:gb(0,82,255);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-align:lef;ex-inden:2em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;选用高效节能的设备&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;国内的风机供货商很多，这些供货商绝大多数都是技术落后、制造水平不高的企业，这些供货商供货的风机实际运行效率比较低。以矿山的风机为例，以2k56、2k58、2k60为代表的矿井通风机，技术比较落后，相对于现在先进的三元流设计的高效风机，效率很低，但目前在市场上仍然存在，需要加快淘汰的步伐。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;当然，高效节能的风机产品比技术落后的产品价格要高，企业在采购设备的时候不能只看设备的初始投资，应综合初始投资、运营成本、维护维修的成本，综合考虑，这样才能真正落实技术先进的设备在现场的应用，达到节能降耗的目的。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;colo:gb(0,82,255);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-align:lef;ex-inden:2em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;选用合适的风机调节方式&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;风机是在系统中工作，实际的系统阻力难免与理论的系统阻力有偏差，因此实际运行中需要调节风机的工作点以适应系统实际的阻力需求。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;风机的调节方式一般有下面几种，入口挡板调节、入口导叶调节、动叶调节以及变速调节，入口挡板调节和入口导叶调节造成的阻力损失较大，因此风机的效率会降低，而动叶调节和变速调节通过调节叶片的角度以及转速来改变风机的性能，不会增加额外的阻力损失，因此风机效率较高，是高效节能的调节方式，应优先选用。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;colo:gb(0,82,255);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-align:lef;ex-inden:2em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;对通风系统优化设计&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;风机是在系统中工作的，撇开系统谈风机没有任何意义，风机的工作效率与系统有很大的关系，这点在前面已经分析过了，为了提高风机的实际运行效率，必须在设计阶段对系统优化设计，着重考虑以下几点：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;管路系统设计要合理，避免急转弯或者通流面积的急剧变化。在管路弯头处根据情况设置导流叶片，以降低气流的损失。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;风机参数的裕量要适度，同前面分析的那样，不要留太大的裕量，避免“大马拉小车&dquo;现象。风机实际工作点越靠近设计点，风机的实际运行效率会越接近设计效率。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;风机出入口的管道尽量设计足够长的直管段，或者在管路中采用整流格栅，这样能减少出入口管路中气流的紊流，从而提高风机的效率。&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;colo:gb(0,82,255);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-align:lef;ex-inden:2em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;进行风机节能改造&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;对已经投运的风机，可以实际测试风机的效率，对于效率较低的风机，可以考虑按以下的方式进行改造，以达到节约能源的目的。&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;对于实际运行点偏离设计点较远的风机，比较有效的节能改造方式是增加变频驱动，改造比较简单，节能效果非常明显，但变频改造的时候要注意上面谈到的问题。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;对于技术落后的风机设备，可以考虑整机更换成高效的设备，改造的时候风机进出口风道基本可以利旧，基础稍微改动即可适用与新的设备。根据经验，高效节能产品淘汰技术落后的产品，投资回收期一般在三年左右。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;对实际运行工作点偏离设计点不大的风机，可以更换转子或者更换叶片，来提高风机的效率。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;对风机系统损失大的场合，可以考虑在风道、弯头增加导叶，减少气流损失，从而达到节能的目的。&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;ex-decoaion-line:undeline;colo:gb(0,82,255);box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;songsyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-align:lef;ex-inden:2em;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;提高设备运营的管理水平&l;/span&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;好的设备需要好的管理，提高设备运营的管理水平，对发挥设备的优势、提高设备运营的效率也是很关键的，建议企业可以从以下几方面入手，争取做到精细计划、按需通风，避免不必要的能源浪费。&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;精心安排生产，合理操控风机，力争实现按需通风。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;提高设备管理人员的业务水平。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;优化系统，避免不必要的系统阻力的增加。&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-family:宋体;colo:black;fon-size:18px;&quo;&g;设备维修保养要到位，避免“凑合着用“等管理观念。&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g;

&l;palign=&quo;cene&quo;&g; &l;/p&g; &l;palign=&quo;cene&quo;&g; &l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;摘要:用静平衡的方法解决风机振动问题。通过动平衡测试，验证此方法达到了设计的要求。&l;song&g;&l;/song&g;&l;/span&g;&l;/p&g; &l;p&g; &l;/p&g; &l;h1&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;1&l;song&g;  引言&l;/song&g;&l;/span&g;&l;/h1&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;2005年7月，我公司在改造安阳钢铁风机时，由于各种原因，在厂组装时没有对转子存在的大量不平衡进行校正，致使在风机房现场平衡校正耗时8天，不仅严重地影响了工程进度，还增加了不必要的费用支出。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;2007年在制造另一风机时，根据理论和实际条件，制定了一套完整的静平衡校正工艺，使不平衡余量一次就减小到标准的要求以下，使此后的同类工作有了完整的规程，并减少了现场工作量。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;song&g;2&l;/song&g;  转子的静平衡校正&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;由于该风机转子是在同一轴上，所以在静平衡时就可能存在偶不平衡造成的平衡假象，为此对转子进行分步校正。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;（1）装好一级轮毂后平衡一级轮毂&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;在５～６号叶柄孔加配重400g后达到平衡。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;（2）装好二级轮毂后平衡二级轮毂在20号叶柄孔加配重440g后平衡。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;（3）由于叶片在加工制造过程中会产生较大的质量差，因此通过加重或取重的办法来使叶片质量差保持在±50g范围内，以减少因叶片质量造成较大的不平衡。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;    （4）带上一级叶片后平衡一级叶片&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;     在４～３号叶柄孔加重450g后平衡。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;（5）带上二级叶片后平衡二级叶片&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;在１４号叶柄孔加重270g后平衡。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;（４）和（５）操作以平衡因较重叶片集中而造成新的不平衡，因平衡位置在轮毂上，因此施加的配重可能要大一些。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;song&g;3&l;/song&g;  传动轴静平衡&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g; 北一风机中间传动轴采用了&l;em&g;φ&l;/em&g;630&imes;7500mm空心卷管，直径大、长度长，卷制中有一定弯曲，中部凸出３mm多，因此存在着较大的不平衡量。对于管类轴平衡，大多是在专用平衡机上平衡，但是，找遍西安也没有如此大的平衡机，在大型车床上加工却因转速过低无法用平衡仪校正。因此决定用静平衡与现场动平衡相结合的方法以使其达到设计要求，关键问题是防止静平衡时造成偶平衡。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;理论上讲长轴平衡应按２面或３面平衡，才不致造成运转时的挠曲。根据实际情况，决定采用２面平衡，此时最佳配重应是距两端总长的22％处。在静平衡架上测得其不平衡量为2376g，根据轴弯曲和轴本身质量分布情况，决定配重应在同一直线上，在距两端法兰1650mm处分别加等质量的长条配重块，这样既可满足轴类平衡要求，又不会造成大的角度误差。用两根长条薄板（各重1150g左右），再施用间断焊使两配重质量达到1188g，静平衡合格。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4 动平衡测试&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g; 通过以上两次静平衡后，于1998年1月21日在风机现场安装完毕后，测得的动平衡结果如下：&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4.1 探头垂直安置&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g; &l;em&g;ｎ&l;/em&g;＝747/min&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;σ&l;em&g;ａ&l;/em&g;＝5，4，6 σ&l;em&g;ｂ&l;/em&g;＝8，9 σ&l;em&g;ｃ&l;/em&g;＝8，10，11&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g; &l;em&g;ａ&l;/em&g;＝2，1，1　&l;em&g;ｂ&l;/em&g;＝7，7　&l;em&g;ｃ&l;/em&g;＝5，5，4&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4.２ 探头水平放置&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g; &l;em&g;ｎ&l;/em&g;＝747/min&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g; σ&l;em&g;ａ&l;/em&g;＝10，8，9 σ&l;em&g;ｂ&l;/em&g;＝28，31 σ&l;em&g;ｃ&l;/em&g;＝19，18，17&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g; &l;em&g;ａ&l;/em&g;＝6，6，6　&l;em&g;ｂ&l;/em&g;＝24，27　&l;em&g;ｃ&l;/em&g;＝13，12，12&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g; （以上σ&l;em&g;ａ&l;/em&g;、&l;em&g;ａ&l;/em&g;等单位均为μｍ；&l;em&g;ａ&l;/em&g;为电机端振动幅度；&l;em&g;b&l;/em&g;为传动轴与主轴联结轴承座振动情况；&l;em&g;c&l;/em&g;为风机进风口端轴承座振动情况。）&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4.3 振动分析&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4.3.1 由于水平方向刚度比垂直方向刚度差，因此，水平方向的振动比垂直方向大。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4.3.2 由于静平衡是在水平导轨上校正，其灵敏度不很高，长轴静平衡时只按一个方向弯曲校正，且默认两端质量相等，质心为几何中心，这样就不可避免地造成角度误差、量值误差和校正平面误差。由于误差的存在，静平衡灵敏度又不很高，使得转子和传动轴在静平衡后仍存在一定的动不平衡。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4.3.3 &l;em&g;ｂ&l;/em&g;面振动是长轴&l;em&g;ｂ&l;/em&g;端与转子&l;em&g;ｂ&l;/em&g;端的合成振动，因此，其结果为当两振动相位差小于90°时加大，比其它两端要大一些。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4.3.4 &l;em&g;ａ&l;/em&g;面振动是电机振动与长轴&l;em&g;ａ&l;/em&g;端的合成振动，由于两振动相位差大于90°，因此其结果比电机的振动（　40μm）要小一些。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4.3.5 电机振动值不大于40μm，电机与长轴合振动不平衡值为６μm，则长轴最大不平衡振动为34μm，平衡已满足要求。&l;em&g;ｂ&l;/em&g;面与&l;em&g;ａ&l;/em&g;面相同，根据以前经验，&l;em&g;ｂ&l;/em&g;面与&l;em&g;ｃ&l;/em&g;面转子振幅相差不大，有一定相位差。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;song&g;5&l;/song&g;  结论&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;风机振动烈度&l;em&g;v&l;/em&g;&l;sub&g;f&l;/sub&g;＝1.55mm/s，该风机电机功率为630kw，转子重达２多，传动轴重达１，属于大型机器，根据iso2372-1996分级评为ａ（优）级。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;工作转速747/min，动平衡精度要求ｇ6.3级时，许用不平衡偏心距&l;em&g;e&l;/em&g;为81μm，本机最大振动幅度32μm，最大不平衡振动幅度为28μm，相当于ｇ2.5级。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;动平衡达到设计要求，用该静平衡方法可以满足设计的振动幅度要求。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;  &l;/span&g;&l;/p&g;

&l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;0 引言&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;离心通风机是生产企业常用的辅助设备，主要用于通风与除尘装置中，确保生产环境洁净，保护生产者身心健康&l;sup&g;[1]&l;/sup&g;。噪声污染是风机运行中存在的致命弱点。它是由多种不同频率声音的无规律的杂乱组合而成，风机的噪声不仅妨碍生产中人们的通讯、语言等交流而影响生产的组织与管理，而且还严重损害人们的身心健康而降低工作效率等。因此，研究和探讨生产离心通风机噪声的产生原因、危险性及其控制途径，对保护操作工人的身体健康及提高企业的经济效益等具有深远而重要的意义&l;sup&g;[1]&l;/sup&g;。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;1 风机噪声分类及噪声机理&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;风机噪声就其主要声源产生机理而言，可分为旋转噪声和涡流噪声；就其频谱特性而言，可分为宽频噪声与离散噪声。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;1.1 离散噪声(旋转噪声)&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;离散噪声是由于叶片周围不对称结构与叶片旋转所形成的周向不均流场相互作用而产生的噪声。它与叶轮的转速有关，特别在高速、低负荷情况下，这种噪声尤为突出。主要体现以下几方面：(1)来流引起的进气干扰的噪声。由于进风口前装有前导叶或金属网罩而产生的进气干涉噪声，在这种情况下，当工作轮旋转时，动叶周期性地承受前面静叶排出不均匀气流，导致气流作用在动叶上的力周期性脉动而产生噪声；(2)叶片在不光滑或不对称机壳中产生的旋转频率噪声。由于机壳内壁形成所必需的条件是旋转对称，否则气流流动状态将不再与轴线完全对称，也就是说周向的圆周速度不再是常数，所以气流便会产生旋流动；(3)出口蜗舌的存在而产生的出口干涉噪声。在叶片出口处沿着工作轮圆周，由于存在尾迹，气流的速度和压力都不均匀，这种不均匀的气流作用在蜗壳上，形成了压力随时间的脉动。反过来它又影响叶轮中气流的流动，于是叶片上的气流也就具有随时间变化的脉动性质。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;这种噪声具有确定的频率，因为每当叶片通过风舌一次，在风舌上就有一个脉冲，反过来给叶片也是一个脉冲。这种叶片通过的频率&l;em&g;f&l;/em&g;&l;sub&g;1&l;/sub&g;称为基频，即：&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;em&g;                   f&l;/em&g;&l;sub&g;1&l;/sub&g;= &l;em&g;nz&l;/em&g;/60&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;式中&l;em&g;f&l;/em&g;&l;sub&g;1&l;/sub&g;为基频，hz；&l;em&g;n&l;/em&g;为转速，/min；&l;em&g;z&l;/em&g;为叶片数。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;同时，由于这种脉动波形不会是单纯的正弦曲线，所以根据级数展开，它还有其它的高次谐音&l;em&g;f&l;/em&g;&l;em&g;&l;sub&g;i&l;/sub&g;&l;/em&g;，表达式为&l;em&g;f&l;/em&g;&l;em&g;&l;sub&g;i&l;/sub&g;&l;/em&g;=&l;em&g;nzi&l;/em&g;/60(&l;em&g;i&l;/em&g; =1，2，3，…)所以旋转噪声具有离散频谱特性，其基频为叶片通过频率，还有它的高次谐音。显然，从旋转噪声的强度看，基频最强，其次是二次谐波、三次谐波，总的趋势是逐渐减弱的。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;1.2 宽频噪声(涡流噪声)&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;涡流噪声主要是由于气流流经叶片时产生紊流附面层及漩涡与漩涡分裂脱体，而引起叶片上压力脉动所造成的涡流噪声。产生的原因主要体现在以下几方面：(1)气流流经叶片、前盘、后盘的内外表面，流经蜗壳内表面及局部表面，气流紊乱引起的压力脉动产生噪声；(2)气流流经叶片前后盘的内外表面及蜗壳表面时，由于附面层发展到一定程度会产生涡流脱离，脱离涡流将造成较大的脉动。在低雷诺数下，周期性涡流的脱离将导致相应环量的改变，也使物体上的气流作用力产生变化；(3)当具有一定紊流度的气流流向叶片时，叶片前缘各点冲角大小将取决于气流平均速度和瞬时扰动速度，在紊流晴况下扰动速度是无规律地变化的，因而也使冲角发生无规律的变化，导致升力的无规律脉动而产生噪声。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;这种旋流具有很宽的频率范围，通常称为宽频噪声，同时它主要是由于漩涡剥落引起的，所以物体绕流漩涡剥落具有确定频率。即&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;em&g;                           f&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;=&l;em&g;s&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;&l;em&g;v&l;/em&g;/&l;em&g;d&l;/em&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;式中 &l;em&g;f&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;为漩涡剥落频率，hz；&l;em&g;s&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;为斯哈托数，&l;em&g;s&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;=0.2；&l;em&g;v&l;/em&g;为特征速度，m/s；&l;em&g;d&l;/em&g;为特征直径或长度，m。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;所以，这种宽频噪声又表现出只具有峰值。即&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;　　　　　　                　&l;em&g;f&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;=0.2&l;em&g;v&l;/em&g;&l;sub&g;1&l;/sub&g;/&l;em&g;d&l;/em&g;&l;sub&g;1&l;/sub&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;式中 &l;em&g;v&l;/em&g;&l;sub&g;1&l;/sub&g;为风速，m/s；&l;em&g;d&l;/em&g;&l;sub&g;1&l;/sub&g;为导线直径，m。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;2 风机噪声级换算&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;若要对离心通风机的运行噪声进行有效控制，首先就必须了解其噪声特性及其噪声级换算的一些基本方法。为了能够客观公正地衡量一台离心通风机的噪声性能，根据jb/t8690-1998《工业通风机  噪声限值》规定各类通风机噪声在最佳工况点的比a声级&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;的计算公式为：&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;em&g;                                       l&l;/em&g;&l;sub&g;sa&l;/sub&g;=&l;em&g;l&l;/em&g;&l;sub&g;a&l;/sub&g;&l;em&g;&l;u&g;－&l;/u&g;&l;/em&g;0lg(&l;em&g;q&middo;&l;/em&g;&l;em&g;p&l;/em&g;&l;sup&g;2&l;/sup&g;)&l;u&g;＋&l;/u&g;19.8&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;式中 &l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;为通风机的比a声级，db；&l;em&g;l&l;/em&g;&l;sub&g;a&l;/sub&g;为对应于通风机工况点的a声级，db；&l;em&g;q&l;/em&g;为通风机测试工况点流量，m&l;sup&g;3&l;/sup&g;/min；&l;em&g;p&l;/em&g;为通风机测试工况点全压，pa。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;通过上式所计算得到的&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;实际上就是通风机产生单位流量、单位全压时的噪声计算相对值。这样，就等于有了比较各种类型通风机噪声的衡量基准。实践证明：同系列的离心通风机的&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;曲线基本相同。如与风机的性能、效率(&l;em&g;&ea;&l;/em&g;)曲线对应绘制成图，就会发现&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;曲线与&l;em&g;&ea;&l;/em&g;曲线很像解析几何中的双曲线，见图1。由图1可见，风机&l;em&g;&ea;&l;/em&g;最大处，&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;最小。且随着风机流量的增大或减小，&l;em&g;&ea;&l;/em&g;曲线向左右回落；而&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;曲线则朝相反方向上翘。这又形象地说明，当风机内部流动情况最佳时，才可能获得最大的效率和最低的噪声。另外，在选择、设计离心通风机噪声控制方案时，必须预测该机在实际运行时产生噪声级的大小。而在实践中，获取该资料的途径无非只有两条：（1）查找有关资料；（2）向供货商索取。但有时得到的是该机的一条比a声级&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;曲线，而不是直接的具体噪声级。这时就需要利用上式进行换算，例如某厂在工艺设计时决定选用9-18№6.3a离心通风机，其运行工况性能：&l;em&g;q&l;/em&g;= 80.33m&l;sup&g;3&l;/sup&g;/min，&l;em&g;p&l;/em&g;=8818pa，对应工况点比a声级&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;=18.8db，计算a声级&l;u&g;&l;sup&g;[2]&l;/sup&g;&l;/u&g;。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;em&g;l&l;/em&g;&l;sub&g;a&l;/sub&g;=&l;em&g;l&l;/em&g;&l;sub&g;sa&l;/sub&g;  10lg(&l;em&g;q&l;/em&g;&middo;&l;em&g;p&l;/em&g;&l;sup&g; 2&l;/sup&g;) －19.8=18.8 10lg(80.33&imes;8818&l;sup&g;2&l;/sup&g;) －19.8=97db&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;可见，风机噪声明显高于企业允许限值(≤85db)，故需对其进行有效控制。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/6-23-6_3.png&quo;syle=&quo;widh:676px;heigh:490px;&quo;/&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3 风机噪声控制方法&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.1 合理选型&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.1.1 在选用风机之前，首先应确保工艺设计的准确性。要使设计工况点的风量、全压基本上与风网实际运行时的风量、全压相接近。如果设计时余量过大，在实际运行时就要关小风机蝶阀。这样做有3个缺点：（1）导致风网阻力增加，造成全压与动力浪费；（2）因阻力增加而浪费掉的&dela;&l;em&g;p&l;/em&g;相应产生的噪声&dela;&l;em&g;l&l;/em&g;&l;sub&g;a&l;/sub&g;则不会消失，仍要产生出来；（3）关小风机蝶阀后，造成风机进气(或出气)状况恶化，将增大涡流噪声&l;u&g;&l;sup&g;[3]&l;/sup&g;&l;/u&g;。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.1.2 工艺设计完成后，在风量和全压方面能满足生产需求的运行方案有很多，可供选择。这时，应选用在该工况点具有最高效率和最低噪声的风机，以确保运行噪声最低。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2 优化结构&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2.1 增强叶栅的气动力载荷，降低圆周速度。对于风机采用强前向叶片，且多叶片叶轮有利于增大叶栅的气动力载荷，在得到同样风量风压情况下，叶轮叶片外圆上圆周速度&l;em&g;u&l;/em&g;小可使风机噪声明显降低。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2.2 确定合理的蜗舌间隙和蜗舌半径。增加风舌与叶轮之间的间隙&l;em&g;&dela;&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;可降低基频和谐波。气流与叶片作相对运动时，叶片后缘的气流尾迹中，速度及压力均小于主流区，使叶栅后的气流速度与压力分布皆不均匀。这种不均匀的流谱在旋转，如果在动叶之后有静叶或风舌，则这种非稳定流动与静叶或风舌相互作用将产生噪声。距离愈近，噪声愈大。但根据有关资料介绍进行试验，当&l;em&g;&dela;&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;大到一定程度后，噪声不再降低，却使风机气动性能变坏，如风量、风压都有所下降。试验表明：在风舌间隙&l;em&g;&dela;&l;/em&g;&l;em&g;&l;sub&g;&l;/sub&g;&l;/em&g;/&l;em&g;r&l;/em&g;=0.25和风舌半径&l;em&g;&l;/em&g;/&l;em&g;r&l;/em&g;=0.2时，具有最大风机效率和最小噪声(&l;em&g;r&l;/em&g;为叶轮半径)。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2.3 倾斜蜗舌。风机叶轮叶栅气流的周期性脉动速度所产生的周期性脉动气动力也使蜗舌相互作用产生旋转噪声，此噪声大小与脉动气动力的剧烈程度及蜗舌的迎风面积有关，把蜗舌做成倾斜式，则同相位的脉动气动力的作用面积小了，辐射的噪声也就减小了，蜗舌的倾斜角&l;em&g;α&l;/em&g;可按an&l;em&g;α&l;/em&g;=(&l;em&g;&l;/em&g;-2&l;em&g;&l;/em&g;)/&l;em&g;b&l;/em&g;计算，其中，&l;em&g;&l;/em&g;为蜗舌半径，&l;em&g;&l;/em&g;为叶轮出口栅距，&l;em&g;b&l;/em&g;为叶片宽度。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2.4 在叶轮进(出)口处加紊流化装置。在风机叶轮叶片的进口或出口处加紊流化装置(金属网)可以使叶片背面的层流附面层立即转换成紊流附面层，推迟叶片背面附面层的分离，甚至不分离，叶片后缘装上网，网后的气流速度与压力梯度能迅速变均匀，若网在涡区中则可将涡区大大缩小，这对减噪是有利的。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2.5 在叶轮上增设分流叶片(短叶片)。在风机中，对无分流叶片的叶轮，当叶片较少时，在叶片通道后半段易产生负速度区，容易导致气流分离，当叶片较多时又容易产生进口阻塞和气流分离。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2.6 在动叶进出气边上设锯齿形结构。该结构可使叶片上气流层流附面层较早地转化为紊流，从而避免层流附面层中的不稳定波导致涡流分离，使噪声降低。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2.7在蜗舌处设置声学共振器。当声波传到共振器时，小孔孔径和空腔中的气体在声波作用下来回运动，这运动的气体具有一定的质量，它抗拒由于声波作用而引起的运动，同时声波进入小孔孔径时，由于颈壁的摩擦和阻尼，使相当一部分声能因热耗而损失掉。另外，充满气体的空腔具有阻碍来自小孔的压力变化的特性，由于这些因素的共同作用，当气体通过共振器时，噪声得到降低。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.2.8 在蜗壳内设置挡流圈。中低压离心通风机的蜗壳宽度与叶轮出口宽度一般较大，气流自叶轮进入蜗壳的扩压变大，在叶轮前盘外侧与蜗壳间产生大尺度漩涡，使涡流噪声增大，效率降低，而蜗壳宽度又不宜过小，否则将增大蜗壳的张开度，使蜗壳出口端面长宽比过大，给后面的管路连接带来困难，同时也使摩擦损失增加。为了减小涡流区，增强风机进口集流器与叶轮进口边间的密封效果，可在蜗壳中加各种形式的挡流圈。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.3 消声&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;风机在高速旋转产生强烈的空气动力性噪声，为阻止声音外传播又允许气流通过，在风机气流通道上装上消声装置，使风机本身发生的噪声和管道中的空气动力噪声降低，定型常用的消声装置有：&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(1)阻性消声器常用片式消声器、蜂窝式消声器、管式消声器及迷宫式消声器等；&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(2)抗性消声器常用共振式消声器、扩张式消声器、混合式消声器及障板式消声器等；&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(3)阻抗复合消声器常用扩张室—阻抗复合式消声器、共振腔—阻性复合式消声器及阻—抗—共复合式消声器。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.4 隔声&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;隔声是噪声控制工程中常用的技术措施，利用墙体各种板材及构件作为屏蔽物或利用维护结构，把噪声控制在一定范围之内，使噪声在空气中的传播受阻而不能顺利通过，从而达到降低噪声的目的。常用的方法有：&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(1)单层密实均匀构件隔声，此类构件的隔声材料要求密实而厚重，如砖墙、钢筋混凝土、钢板、木板等，隔声性能与材料的刚性、阻尼面密度有关；&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(2)双层结构隔声，在两个单层结构中间夹有一定厚度的空气，或多孔材料的复合结构，一般可比同样质量的单层结构隔声量高5~10db；&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(3)隔声罩和隔声间，对于体积小的噪声源，直接用隔声结构罩起，可以获得显著的降噪效果，这就是隔声罩，有很多分散的噪声源时可考虑建立一个小空间，使之与噪声源隔离开来，这就是隔声间；&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(4)隔声屏是放在噪声源和受声点之间的用隔声结构所制成的一种隔声装置。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3.5 吸声&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;在墙面或顶棚上饰以吸声材料、吸声结构或在空间悬挂吸声板，吸声体混合声就会被吸收掉，这种控制噪声的方法称做吸声降噪。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(1)吸声材料在吸声降噪方法中吸声材料很重要，常用的有：①纤维材料，包括有机纤维、无机纤维和纤维制品；②颗粒材料，包括砌块和板材；③泡沫材料，包括泡沫塑料、其他等三大类二十几种。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(2)共振吸声结构是利用共振原理做成的各种吸声结构，用于对低频声波的吸收，最常用结构分单个共振式(包括薄膜、薄板结构)和穿孔板吸声结构。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;(3)微穿孔板吸声结构由板厚和孔径均在1mm以下、穿孔率为1%~3%的金属微穿孔板和空腔组成的复合结构。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4 结束语&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;离心通风机噪声的控制是生产企业面临的一个重要课题。它应从风机的设计和制造入手，需要优化和完善风机结构，采用先进的制造工艺与方法提高制作质量和精度，尽量减少空气动力噪声的产生。同时，安装和检验也是一个不可忽视的环节，必须对叶轮、风机轴、皮带轮及联轴器等旋转零部件进行严格的静平衡和动平衡校正，以减少因风机振动而产生的机械噪声。由于离心通风机的叶轮叶片极易产生磨损而形成噪声，所以，应通过对风机的噪声进行检测、分析和研究等工作后，确定其噪声的主要来源及其传播途径，并采取有效的噪声治理措施，达到减弱或切断噪声的传播途径或消除噪声源的目的，确保最大限度地减轻离心通风机对周围环境的噪声污染，以提高企业的生产环境及促进企业的和谐和可持续发展。&l;/span&g;&l;/p&g; &l;palign=&quo;cene&quo;&g; &l;/p&g;

&l;palign=&quo;cene&quo;&g; &l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;【摘要】分析了大型电站锅炉鼓引风机主轴采用焊接空心轴的可行性。介绍了空心轴焊接的具体工艺方法。指出了其实用效果及经济效益。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;song&g;前言&l;/song&g;&l;/span&g;&l;/li&g; &l;/ul&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;随着电站单机容量的增加，离心通风机的尺寸、重量将大大增加。平舆电厂60万kw机组采用的y4-2x73№37f型双吸离心式引风机，其叶轮直径达3.7m，主轴轴颈为360mm，全长为11195mm，重量达23700kg。这不仅给制造、运输、安装、运行及维修带来困难，而且还提高了制造成本和设备价格。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;由于主轴较重需采用滑动轴承，相应的配有润滑油站、高位油箱及盘车装置等许多辅助设备，既增加了设备的投资，又占用了较大的生产场地。因此，在大型通风机中采用空心轴是一个急需解决的大问题。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;目前，国产大型通风机采用空心主轴结构的甚少，而部分进口离心式引风机普遍采用了空心轴的结构，并且运行良好。如清河、马头、神头3个电厂从前苏联引进的7台20万kw燃煤锅炉，其中14台ⅱ25x2ⅲb型离心式引风机均采用了空心主轴的结构，黄台电厂从日本引进的1台30万kw燃煤锅炉所配置的离心式引风机也采用了空心轴结构；成都电力机械厂为烟台电厂20万kw燃煤锅炉研制了锻造空心轴（即锻造后再掏空）已经安全运转6年，实践证明，在大型通风机设计上采用空心轴结构是完全可行的。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;song&g;焊接空心轴的主要工作&l;/song&g;&l;/span&g;&l;/li&g; &l;/ul&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;空心轴在工艺方面需闯三关。即焊接关、车工关及装配关。而焊接关是决定空心轴能否成功的关键。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;空心轴焊接结构的设计&l;/span&g;&l;/li&g; &l;/ul&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;确定y4-2x73№28.5f引风机中的主轴用空心轴。该风机是双吸入双支撑形式，根据轴的几何形状和尺寸，设计、工艺共同确定了空心轴的结构。主轴中间大部分为厚壁无缝钢管，空心管的两端为实心轴头，实心轴头与空心管采用焊接的方式连接在一起。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;采用这种结构形式的空心轴关键在于：a、空心轴的材料及性能b、焊接坡口的形式及工艺试验c、空心轴的焊接 &l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;2）空心轴的材料及性能&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;空心轴所用钢管是从德国进口的无缝钢管，材料为12c1mov。此材料为耐热钢，在引风机200℃烟气下工作其机械性能变化不大；且材料的机械性能可以满足设计要求；在焊接方面，只要采取合理的工艺措施是可以焊接的。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3）轴头的材料及性能&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;轴头采用16mn锻件，材料的机械性能见下表，粗加工后调质处理&l;/span&g;&l;/p&g; &l;ablebode=&quo;1&quo;cellspacing=&quo;0&quo;syle=&quo;widh:459px;&quo;&g; &l;body&g; &l;&g; &l;dsyle=&quo;widh:102px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&dela;b（mpa）&l;/span&g;&l;/p&g; &l;/d&g; &l;dsyle=&quo;widh:86px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&dela;s（mpa&l;/span&g;&l;/p&g; &l;/d&g; &l;dsyle=&quo;widh:86px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&dela;s（%）&l;/span&g;&l;/p&g; &l;/d&g; &l;dsyle=&quo;widh:80px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;ψ（%）&l;/span&g;&l;/p&g; &l;/d&g; &l;dsyle=&quo;widh:105px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;ak（j/cm2）&l;/span&g;&l;/p&g; &l;/d&g; &l;/&g; &l;&g; &l;dsyle=&quo;widh:102px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;≥490&l;/span&g;&l;/p&g; &l;/d&g; &l;dsyle=&quo;widh:86px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;≥245&l;/span&g;&l;/p&g; &l;/d&g; &l;dsyle=&quo;widh:86px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;≥15&l;/span&g;&l;/p&g; &l;/d&g; &l;dsyle=&quo;widh:80px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;≥40&l;/span&g;&l;/p&g; &l;/d&g; &l;dsyle=&quo;widh:105px;&quo;&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;≥50&l;/span&g;&l;/p&g; &l;/d&g; &l;/&g; &l;/body&g; &l;/able&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3）焊接坡口的形式及工艺试验&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;焊接坡口形式的确定&l;/span&g;&l;/li&g; &l;/ul&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;要想保证空心轴焊后强度，首先要确定合理的焊接坡口形式，根据坡口形式去做具体的工艺试验，采用的坡口形式为下图，这种坡口形式的优点在于，当施焊人员对u型槽底进行氩弧焊封底时，靠铁水子熔，很容易焊透钢管与轴头的接合处。另外，在钢管距坡口中心处钻通氩气保护的通气孔，在轴头处钻出排气孔。利用氩气进行封底保护有利于焊缝成型，防止焊缝金属氧化。这对主轴在运转过程中，因接合处而发生的疲劳扩散有一定的抑制作用。通过焊接工艺试验，证明了这种坡口形式是科学合理的。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;焊接工艺试验&l;/span&g;&l;/li&g; &l;/ul&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;要保证空心轴焊接成功，一定要做必要的工艺试验，通过试验做到心中有数，从而编制出合理的焊接工艺。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;12c1mov钢抗焊接氢致裂纹敏感性的评定：进行插销试验和铁研试验。这两种试验均采用φ4mm，r317焊条手动电弧焊，焊条经过350℃x2h烘干处理。焊接速度：150mm/min，电流170a，电弧电压：22~25v。&l;/span&g;&l;/li&g; &l;/ul&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;试验结果：从插销试验和铁研试验的结果，预热温度100℃和150℃对氢裂纹不敏感，没有氢脆问题。所以确认12c1mov钢的预热温度为100~150℃。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;12c1mov钢埋弧焊焊接接头抗旋转弯曲疲劳性能的评定：埋弧焊工艺及焊丝、焊剂。埋弧焊采用双u型坡口，板厚40mm，手工埋弧焊打底，双面采用φ4mm，h08cmova焊丝，hj350焊剂。&l;/span&g;&l;/li&g; &l;/ul&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;工艺参数包括手工氩弧焊和埋弧焊。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;手工氩弧焊&l;/span&g;&l;/li&g; &l;/ul&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;电弧电压：11v焊接电流：180a焊接速度：15.4m/h氩气流量：9l/min不填焊丝。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;埋弧焊&l;/span&g;&l;/li&g; &l;/ul&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;焊接电压：37v焊接电流：500a焊接速度21m/h试板焊后石棉布保温缓冷，经650~700热处理&l;/span&g;&l;/p&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;试验后的结果表明，旋转疲劳极限343mpa，这一结果对12c1mov的材料来说是比较高的。因为工作应力不会超过屈服极限395mpa，因此是安全的，用埋伏焊焊接的焊缝不会产生疲劳裂纹。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4）用耐热钢r317焊条做斜y型坡口焊接裂纹试验，通过这种试验看其热影响区是否产生冷裂纹，也可看出焊缝冷裂纹、热裂纹或再热裂纹。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;5)通过钢性固定对接试验看其焊缝是否产生热裂纹或再热裂纹，也可检验热影响区是否产生冷裂纹。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;6)选用r317焊条做焊接接头机械性能试验，各项指标均达到设计要求，证明所选焊接材料、工艺规范各项参数的正确性。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin-lef:21.0000p;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;7）钨极氩弧焊封底试验。按其焊缝的结构形式模拟加工出焊接时的坡口形式惊醒氩弧焊封底试验，由此选择出封底焊的最佳焊接规范，确定封底电流，从而获得理想的封底效果。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4、焊前准备工作&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;   1）焊接转胎的调试&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;选择本厂自制10吨转胎，通过调试使转胎运转过程缓慢、平稳，与焊接时的速度相匹配。运转一周，轴的轴向、纵向位置不窜动，周而复始保持焊缝中心位置不变。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;2）焊接加热器的调试&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;由于轴的长度（近10m）所限，只能预热一端焊一端。选择φ670mm红外线加热器，用电控柜进行控制加温，主要预热焊缝两侧，致使温度保持在150~200℃之间；选用φ330mm的红外线加热器，用交流电焊机做电源控制，主要加热轴头靠近焊缝侧。这种加热方法，使轴头的热膨胀伸长量走向焊缝，有利焊缝的封底、焊接，保证焊接不产生裂纹。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3）焊接电源的调试&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;a、氩弧焊封底所采用的焊接设备为我厂购置美国mille公司的焊接设备。该焊机经过调试，电压基本不受网络电压影响而波动，焊接时所选用的焊接电流一旦固定，整个焊接封底过程中，电流波动为±1a，保证了封底时既能焊透又成型美观。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;b、多头式子母焊机是封底后手工电弧焊的设备。该设备是通过变阻器来调节电流大小的，通过调试，电流可达预想的效果。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4）焊工的培训&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;a、对氩弧焊封底的焊工培训。试板的坡口形式与空心轴的坡口形式相同。采用正式焊接的规范进行操作练习，工艺人员从理论上、实际操作上进行现场指导，使焊工掌握要领，焊接后对试件检查、确认，使焊工真正掌握氩弧焊封底要领，为空心轴焊接氩弧焊封底打下坚实基础。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;b、焊工培训的另一个重点是手工电弧焊，在封底后检查合格的试件上，用r317焊条施焊各层。在焊接过程中，注意坡口两侧要充分熔合，避免夹渣、未焊透、未熔合等缺陷发生。在确认工艺规范的同时，提高焊接技术，为空心轴一次焊接成功奠定基础。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;song&g;三、空心轴的焊接程序&l;/song&g;&l;/span&g;&l;/li&g; &l;/ul&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;1）拼装点固&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;先装一端轴头，检查合格后趁热装，将6块拉筋（40x100x400 q235a）等分对称焊至钢管与轴头两侧。 焊条牌号：j427焊条直径φ4mm 焊接电源：直流反接焊接电流：160~180a 焊脚高度：不大于10mm 然后再热装另一端轴头，按上述要求焊一端轴头与钢管的拉筋。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;2）焊前准备&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;a核对按图样尺寸要求核对焊接坡口尺寸及空心轴的拼装点固焊接质量。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;b清洗将焊接坡口内及距焊缝坡口50mm内的外表面的油、绣等污物，用丙酮、酒精清洗干净。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;c、安装好充背氩的冲氩气系统。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;d、将r317焊条：φ4、φ5mm焊条经350℃x2h烘干处理；将hj350焊条经350~400℃x2h烘焙处理；将h08cmova焊丝：φ4mm焊丝清除油、锈。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;e、包保温材料：将两焊缝的两侧分别用无碱玻璃丝棉布包扎好，放到滚轮胎上&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;f、预热将红外线加热器根据主轴距地面高度，调到合适的位置，并用角钢做支架，放好焊牢，使主轴能自由转动。预热温度为200~250℃。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;g、调试红外线预热器接通电源，调试好埋弧自动焊操作架，检查滚轮转胎启动是否正常，确保无误后再正式焊接。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;h、充背氩气流量：3~5l/min；确保空心轴内的空气完全排出&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3)钨极氩弧焊封底&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;1、焊接工艺焊接电源为ave350焊接电流为10~12a氩气流量为8~12l/min熔池形成时间为5秒，焊接速度为2.52m/h氩气滞后时间为3~5秒，钨极自己为φ3mm焊嘴尺寸为φ10mm。焊接时要对称施焊。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;2、后热将封底焊好的焊缝加热到350~400℃保温2~3小时后，缓冷至室温。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3、检查对焊缝进行着色探伤检查。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4、氩弧焊封底焊接另一端焊缝。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;5、后热另一端&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;6、检查对焊缝进行着色探伤检查&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4）焊接&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;1、手工电弧焊将工件用红外线加热器预热后做手工电弧焊焊条牌号317焊条直径φ4~5&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;2、气割将焊缝处的拉筋用乙炔气割，割掉。切割时，不可将工件表面割伤。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;3、埋弧自动焊将工件用红外线加热器预热后做埋弧自动焊焊剂：hj350焊丝：h08cmova&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;  焊丝直径：φ4&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;4、后热将焊缝处加热到350~400℃/2h做消氢处理&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;5、按上诉工艺手工电弧焊，焊接另一端焊缝&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;6、气割另一端的拉筋&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;7、按上述工艺埋弧自动焊，焊接另一端焊缝&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;8、检查按图样要求，对焊缝做超声波检查，然后再检查拉筋处的焊缝，若有咬肉、割伤，要进行补焊，补焊工艺与正式焊接工艺相同&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;5）消应力&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;检查合格后做消应力处理&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;空心轴的焊接时在有充分的准备，万事俱备的条件下进行的，焊接过程中，注意坡口两侧充分熔合，严防夹渣、未熔合。焊后清渣，除去焊瘤、飞溅。由于焊工操作认真，工艺人员跟班指导，进行每道焊缝的检查、认可，从而使空心轴焊后超声波探伤100%合格，达到国家标准。&l;/span&g;&l;/p&g; &l;ulsyle=&quo;lis-syle-ype:squae;&quo;&g; &l;li&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;song&g;空心轴焊接的实用性及经济效益&l;/song&g;&l;/span&g;&l;/li&g; &l;/ul&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;原实心轴重13600kg，改为空心轴重6660kg，减少重量6940kg，减轻重量达51%。该空心轴在河南安阳电厂运行6年，情况良好。可用于30万kw发电机组以上的锅炉送引风机和150m2以上大型烧结引风机等风机上。在不计烟气中粉尘磨损情况下，引风机主轴寿命大于5年，送风机寿命大于8年。经计算，各项技术指标均满足设计要求，故可靠性与实心轴基本相同，且临界转速有所提高，实心轴为960/min，空心轴临界转速为1089/min，提高11.7%。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;    原实心轴单价约50万元，现空心轴单价约15万元，扣除空心轴厂内制造成本略高和首次试制的因素，每根主轴至少可节约25万元以上，可见在保证实心轴风机相同利润的前提下，可降低风机成本，增强了市场的竞争力。&l;/span&g;&l;/p&g; &l;p&g; &l;/p&g;

&l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障1.png&quo;syle=&quo;widh:675px;heigh:418px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障2.png&quo;syle=&quo;widh:672px;heigh:418px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障3.png&quo;syle=&quo;widh:677px;heigh:423px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障4.png&quo;syle=&quo;widh:672px;heigh:417px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障5.png&quo;syle=&quo;widh:675px;heigh:426px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障6.png&quo;syle=&quo;widh:674px;heigh:428px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障7.png&quo;syle=&quo;widh:676px;heigh:426px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障8.png&quo;syle=&quo;widh:674px;heigh:426px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障9.png&quo;syle=&quo;widh:673px;heigh:426px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障10.png&quo;syle=&quo;widh:674px;heigh:424px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障11.png&quo;syle=&quo;widh:676px;heigh:425px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障12.png&quo;syle=&quo;widh:671px;heigh:425px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障13.png&quo;syle=&quo;widh:675px;heigh:423px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障14.png&quo;syle=&quo;widh:673px;heigh:424px;&quo;/&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/故障15.png&quo;syle=&quo;widh:675px;heigh:423px;&quo;/&g;&l;/p&g;

&l;palign=&quo;cene&quo;&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;机翼型叶片展开&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;4-72型离心通风机中空机翼型叶片展开方法(4-73型与4-72型叶片的差异,在于非工作面亦为弧面)。该型片以a一a和b一b面为基础进行展开,然后接出a一a线与轮盖间的部分线段,对于叶片在a一a与b一b间的弧面部分,用三角形法法展开,平面部分用平行线法展开。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;展开步骤如下：&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;1.画实样图&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;以适当比例作叶轮和叶片的主视图和俯视图,叶片按板厚中性层画。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;2.在俯视图叶片根部(b一b截面)叶片型线上,分适量小段,标注分段点号码1、2、3……15.&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;3.俯视图中较小翼型,为主视图a-a截面投影。过叶轮中心o,连o-11、0-12、0-13、o-14与a-a截面相交于点19、18、17、16;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;4.把根部和顶部翼型鼻端点作为分段点,即20、9两点(即弯折线).&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;5.机翼型叶片底线是直线,且垂直于轮盘因此a-a和b-b截面的翼型底线在俯视图上重合,所以根部翼型分段1、2……7顶部翼型分段点1&pime;、2&pime;……7&pime;对应,可按平板形叶片展开,且各素线均为实长。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;6.作a-a和b-b两截面间通过中心o的素线实长图,把俯视图叶片根部上的分段点11、12、13、14四点,分别以o-11、o-12、o-13、o-14为半径旋转到o-x&pime;线上,再延伸到主视图b—b剖线上,其点为11&pime;、12&pime;、13&pime;、14&pime;同理,得19、18、17、16在主视图a-a部线上的点19&pime;、18&pime;、17&pime;、16&pime;。连接14&pime;-16&pime;、13&pime;-17&pime;、12&pime;-18&pime;、11&pime;-19&pime;,并延长与轮盖相交,其交点为p、u、n、q,则12&pime;-n、13&pime;-u、14&pime;-p即为叶片在该处的实长。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;7.作a-a和b-b两截面间,且不通过中心o的素线实长图。为应用三角形法作实长图,将俯视图上a-a与b-b间分成毗连的三角形(用虚线表示)。如俯视图上8-20投影长度为叶片斜高实长图上三角形的一边,两剖面间距离为另一边,则三角形的斜边8-20即为该两点间的实长。同理,得出10-20、10-19、11-18,13-18,13-16、15-16,标在一组叶片斜高实长图中。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;8. 关于不能直接在主视图右侧与轮盖相交求出实长的延长线段,可用补助点的方法求其延长段的实长,为了作图方便,把求9-20延长段的实长图放在主视图右侧附近,首先在俯视图中,在9-20的延长线上,任意(按作图方便和旋转,投影后能和轮盖相交)决定两点a,b,旋转到o-x&pime;线上,再垂直向上与轮盖相交,交点为20、a、b,并分别作平行于a-a剖线向右引线,另外在a-a线右端延长线上,按俯视图中20、a、b三点的投影距离,从a一a线向上作垂线,分别于a&pime;、b&pime;、2&pime;0向右的引线相交于a&dquo;、b&dquo;、20&dquo;,连接20&dquo;、a&dquo;、b&dquo;成近似直线的曲线。同时,按三角形法作9-20实长线,并延长与20&dquo;一a&dquo;一b&dquo;曲线相交于m,则20-m即为9-20延长与轮盖相交的实长。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/机翼叶片.jpg&quo;syle=&quo;widh:901px;heigh:1200px;&quo;/&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;9. 画展开图&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;1)叶片平面部分按俯视图上1-7点各分点的距离和其在轮盖型线上相应点的实长,用直角坐标法作出;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;2)作8-7&pime;线,以俯视图中7-8长,定出8点,作8-7&pime;相交;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;3)作q-m线,以俯视图中8-9长,定出q点,然后8点和7&pime;点为基点,分别与俯视&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;图中的7-20长和实长中的8-20长,画弧交于展开图中的20点,然后连9-20延长至m点;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;4) 用三角形法作a-a与b-b的叶片弧面展开图。以9-20鼻端点为基点,分别以俯视图中的9-10长和实长图中的10-20长,画弧交于展开图中的10点。再以10、20点为基点,分别以俯视图中的20-19长,画弧交于展开图中的19点…以此类推将a-a、b-b剖面间的叶片展开后,凡与轮盖相交的实线段,应在展开图中一一延长,如20-m、18-n、17-u、16-p,最后用曲线板连接起来,在叶片翼型尾部,由于板厚和焊接问题,使翼型底面板在a-a剖面线上减去l2,在b-b剖面线上减去l1(见翼尾交接放大图及叶片展开图),15-15&pime;直线连接。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g;注：展开图中必须注意的,如8-7&pime;线界于叶片弧面和平面之间,它的延长线也必在两分界面的曲线上。7-7&pime;虽也在平面内,但从主视图左侧的投影看出,上段已越出外形线,故延长线不能与轮盖相交,该延长线起不到定曲线作用6-6线从主视图左侧看出,其延长线交于叶片与轮盖相交线之内。因此,6-6&pime;的延长线起到定曲线的作用。另外11-19的延长线,虽在主视图右侧能与轮盖相交,但这是假象,再从展开图看,它与能定叶片展开曲线20-m的线段在中间相交,故它起不到定点的作用。从主视图左侧看,叶片最高点位于6&pime;与7&pime;之间,由此点向下作垂线至o-x线,再旋转至根部翼型相交,则由俯视图可定出6点至7点间该点的位置,从而定出最高点及展开曲线。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:14px;&quo;&g; &l;/span&g;&l;/p&g;

&l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:21px;fon-size:10.5p;fon-family:等线;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机是利用电能驱动电机，进而把机械能转换成流体动能从而传送流体的机械，很明显，风机属于典型的旋转通用机械。&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机是国民生产过程中必不可少的设备，应用广泛，几乎覆盖国民经济的各个行业。&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;fon-family:宋体;fon-size:18px;ex-inden:0p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由于风机所起的重要作用，其选型、设计和应用得到各行业的重视。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;fon-size:14p;fon-family:&quo;timesnewroman&quo;;line-heigh:nomal;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;风机既然是旋转机械，那么风机的转速是风机设计中的重要参数，如何合理地确定风机的转速呢？&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box;line-heigh:30px;fon-vaian-numeic:nomal;colo:gb(0,128,255);lee-spacing:0.48px;fon-family:等线;fon-size:20px;fon-weigh:700;oveflow-wap:beak-wod!impoan;&quo;&g;□1 &l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box;line-heigh:30px;fon-vaian-numeic:nomal;colo:gb(0,128,255);lee-spacing:0.48px;fon-family:等线;fon-size:20px;fon-weigh:700;oveflow-wap:beak-wod!impoan;&quo;&g;风机转速对风机的性能的影响&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;风机的转速对风机性能的影响主要根据风机比例定律来决定，风机的比例定律如下：&l;/span&g;&l;/p&g; &l;pbode-box=&quo;&quo;box-sizing:=&quo;&quo;beak-wod=&quo;&quo;new=&quo;&quo;oveflow-wap:=&quo;&quo;syle=&quo;magin:0p0px0p0p;padding:0px;colo:gb(52,52,52);fon-family:微软雅黑;ex-inden:0p;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;line-heigh:28px;fon-size:14p;ex-align:cene;&quo;ex-align:=&quo;&quo;imes=&quo;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:27px;fon-family:宋体;fon-size:18px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;q1/q2=n1/n2&l;/span&g;&l;/p&g; &l;pbode-box=&quo;&quo;box-sizing:=&quo;&quo;beak-wod=&quo;&quo;new=&quo;&quo;oveflow-wap:=&quo;&quo;syle=&quo;magin:0p0px0p0p;padding:0px;colo:gb(52,52,52);fon-family:微软雅黑;ex-inden:0p;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;line-heigh:28px;fon-size:14p;ex-align:cene;&quo;ex-align:=&quo;&quo;imes=&quo;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;fon-family:宋体;fon-size:18px;lee-spacing:0.544px;&quo;&g;h1/h2=(n1/n2)&l;supsyle=&quo;magin:0px;padding:0px;&quo;&g;2&l;/sup&g;&l;/span&g;&l;/p&g; &l;pbode-box=&quo;&quo;box-sizing:=&quo;&quo;beak-wod=&quo;&quo;new=&quo;&quo;oveflow-wap:=&quo;&quo;syle=&quo;magin:0p0px0p0p;padding:0px;colo:gb(52,52,52);fon-family:微软雅黑;ex-inden:0p;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;line-heigh:28px;fon-size:14p;ex-align:cene;&quo;ex-align:=&quo;&quo;imes=&quo;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;fon-family:宋体;fon-size:18px;lee-spacing:0.544px;&quo;&g;n1/n2=(n1/n2)&l;/span&g;&l;supsyle=&quo;magin:0px;padding:0px;fon-family:宋体;lee-spacing:0.544px;&quo;&g;3&l;/sup&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;由此可见，风机的流量与转速成正比，风机的压力与转速的平方成正比，风机的轴功率与转速的立方成正比，因此，风机的转速越高，风机能提供的压力和流量越大，见下面的示意图。当转速由n1降低到n2的时候，风机提供的性能也会降低。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/1620370595(1).png&quo;syle=&quo;widh:541px;heigh:378px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;□2 确定风机转速的原则&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;从风机性能的角度来看，转速当然是越高越好，但从材机械设计，比如材料、结构设计的角度来看，过高的转速对材料的强度要求越高，因此转速的设计是需要综合风机的性能、风机的机械结构、材料等综合来考虑的，是一个比较负责的各个方面平衡的过程。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;风机在做机械设计需要综合考虑，主要考虑以下方面：&l;/span&g;&l;/p&g; &l;ulclass=&quo;lis-paddinglef-2&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:2.2em;max-widh:100%;fon-family:-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:cicle;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;风机的性能&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;材料的选择&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;强度的计算&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;结构的设计&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;制造工艺的合理性&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;成本是否经济&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;客户的使用方便性&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;风机的磨损&l;/span&g;&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g; &l;psyle=&quo;magin:0p0px0p21p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:lef;ex-inden:-21p;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;安全可靠&l;/span&g;&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;但重中之重是设备运行的安全，因此设计时各个环节都会留有合适的安全系数，以上这些因素彼此影响、彼此制约，需要综合平衡，找出最合理的方案，因此任何单独强调某一个因素都是不合理的。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;查阅我国风机的各行业标准，都没有对风机的转速做强制性的要求，根本原因就是上面说的转速是一个综合设计的结果，不同的制造企业，由于技术水平、制造水平参次不齐，是无法强制性要求风机遵守同一转速要求的。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;□3转速越高越不安全吗？&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;目前，国内部分技术人员会认为风机转速越高越不安全，这是不合理的认识误区。如前所述，风机的设计是一个综合考虑的过程，有严格的设计标准或者是安全系数的要求，任何风机供货商的设计都会非常重视安全性的，一个新的型号设计完成之后，都要做样机，并在现场运行，总结运行的问题，并改进设计，最终完成该型号的定型设计，所以只要是投入市场的风机，其转速不论高低，都应该是安全可靠的，认为风机的转速越高越不安全，是纯粹的想当然，没有任何的科学性。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;fon-size:18px;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;&quo;&g;在这里，我们拿我国的火车为例，慢车的速度为70，快车的速度为&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:27px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;120，&l;/span&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;&quo;&g;动车的速度为250，高铁的速度为300，同样是火车，不同的技术，不同的设计，其速度当然是不一样的，不能因为高铁的速度远高于慢车，就认为高铁不安全，这个与风机的转速是一个道理。&l;/span&g;&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;□ 4风机转速与磨损的关系&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;如果风机输送的气体含有尘埃颗粒，那风机运行时会发生磨损现象，尤其是叶片，这会影响风机的正常使用寿命。同样的条件下，转速越高，风机的磨损越厉害，转子的寿命就会越短。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;因此对于磨损大的应用场合，在确定风机转速的时候，磨损就变成一个至关重要的因素了，在满足其他条件的情况下，应尽量选用低转速的风机。风机转速越低，同样的出力的时候，风机的体积就越大，造价越高，占地也增加，与之连接的风道直径也变大，总体初始投资随之增加。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;所以即使在有磨损的场合，也需要综合考虑成本，而非教条地选择转速较低的风机。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;□5风机转速与噪音的关系&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;风机噪音的大小与风机的出力有直接关系，计算公式如下：&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;ex-align:cene;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;lsa=la-20lg(pq) 19.8&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;可见，风机的噪声取决于风压和风量，与转速根本没有关系。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;那有些人会问了，同样的风机转速降低之后，噪音确实小了啊，不要忘记了，转速降低之后，风机的出力也变小了，噪音当然相应降低了，但这是风机的负荷时满足不了你的需求的。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;因此，在同样的设计理念和制造水平下，风机的噪音与转速没有直接的关系。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;line-heigh:30px;colo:gb(0,128,255);fon-family:等线;fon-size:20px;fon-weigh:700;lee-spacing:0.48px;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;□6小结&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;综上可知，风机的转速最主要取决于科学技术的发展，随着计算机辅助设计的发展以及新材料的出现，风机的设计转速是越来越高，从我国的风机的发展过程来看，风机的设计转速也是一个由低转速到高转速逐渐发展的过程，这个同前面举得火车的例子是一样的。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;单纯以风机转速或者线速度来衡量风机的安全是不全面的、不科学的，风机并非由于转速高而不安全，反之，也并非转速低而更安全。&l;/span&g;&l;/p&g; &l;psyle=&quo;magin:0p0px0p0p;padding:0px;max-widh:100%;clea:boh;min-heigh:1em;lee-spacing:0.544px;ex-inden:0p;line-heigh:28px;fon-size:14p;fon-family:&quo;timesnewroman&quo;;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;max-widh:100%;box-sizing:bode-box!impoan;wod-wap:beak-wod!impoan;line-heigh:27px;fon-family:宋体;fon-size:18px;&quo;&g;因此在选择风机速度的时候，要以科学的态度和发展的眼光来做出正确的决定，这里要尊重风机设备商的方案，风机设计的时候是经过综合平衡而确定的风机转速。永远记住，你买风机需要的是风机的性能，而实现风机性能的设计是由风机设备商来做的，他们是最专业的。&l;/span&g;&l;/p&g; &l;div&g; &l;/div&g;

&l;p&g; &l;spansyle=&quo;fon-size:16px;&quo;&g;  蜗壳是离心式通风机最好和最简单的导向或扩压装置，这在通风机工程中是众所周知的。而轴流通风机就不是如此，当轴流通风机采用蜗壳时，机组外形尺寸很大，这是令人遗憾的，此外，许多试验已经证明，这样还可能引起过大的损失。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;  在某些情况下，有可能研制出一种轴向蜗壳，其外形为半裸旋状而出口位于圆形扇面上。这种结构比装在轴流式通风机外围的蜗壳产生的损失小，还便于对驱动电机进行检修。&l;/span&g;&l;/p&g;

&l;p&g;  &l;spansyle=&quo;fon-size:16px;&quo;&g; 在某些情况下，轴流式通风机需要蜗壳。其优点是由于去掉了导叶使性能曲线和效率曲线变得更平坦；其缺点是装置尺寸较大。在某些情况下，出口速度可能相当大，因此必须注意不要使气流急剧的转向。图184和图185列出的是成功的结构。计算按照以前的原则进行。&l;/span&g;&l;/p&g; &l;psyle=&quo;ex-align:cene;&quo;&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/1cc34ecf330c082948d1b907662d025.png&quo;/&g;&l;/span&g;&l;/p&g;

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w/fpw79dqjm6sofyokuqomziqygsc1yurrdtgeoj6x0ucx1nnebtvvqpcztzxczvgqrpjfjxw31luf5bvithupa2gbwaak7aziyjlbmsgygg6ci8/rucscs/munav13ivgfsnykcaakabllyy8uyzgnsajcicvdiwcuhgjo3n0ydkheqkv0x1cobbnakxaswxqwmd9sqxsgxbxs6imirmv6ugpi5ld0bninowonvvedn6zhemjiqsesm fpd3fgkd7vjb0ygnspceqkgxeqmowoa2kgho/mb2gbj8aezaw7q45xcon fgs0oiukeylcqhfiefywgos1snlvcn54arxkonvebwak0cuwslsdhrjbdip0pd08nih6wh0sh1qitie4anoaqwkliqsyqlnqhxsse85iau2sfvaerbodyeyp72zkmjwhesfbqjeij/sgzjhkhbs7uzp9skocgepl0yzwf9eph/rjyymumfg5fbk4w5km5mjmvdcdhswjinyf25bylmv0gmqouqwy15z5wdv4emdiz4nwkuksajgzczyqjvev8dracjp pdqwbyate8fjtu9l4sgmlfga2qeektiugrijkweldeyfz4fys1dggvmtud4 vnksqwb//wcqvgjmkzjiblyzmfy8dhojloaa3gvsvuhu9eqswdhhhowoxxp0fb0wza7veefzntbjpokjiqupizn8xbmumlicufqkxxia6tqbbha5m7ngva635vuggmcqaqxqkjsaxsum7k3fcp51iafofnohkvf8w1lpwjokpmxjwkiezc6qy/yr47jefxdiynwgqryrkbdt rfepydzc4goszgu d2aheb4bpgjfakoqkg5b a/rezdwvsdlyganq9oz33oflj4yuvxxhlqlffgzo lmv1gcllrwlmsuzkm ellcmy4hohnwfbvlzqr9gfp4a9f/p/jd9f2pq4dp5udpr0qd/faranq6vxjob5swf8oz/33//ptqa6upujssak3fuxd4fz08d1do9/8d8wip0k6agpeaaaaasuvork5cyii=&quo;/&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;   若将叶轮后的空气在既不改变流速大小，又不改变流速方向的条件下收集起来，那么就有希望做到几乎无损失地收集空气。很高的气体出口速度必须在一个连接于其后的直壁扩压器中转变为静压。比起导向装置来，在直壁扩压器中，扩压过程往往容易控制。这就是说，我们只须在叶轮后面给空气提供一个收集装置。作者根据这种设想研制了螺旋形扩压器。空气进入环状空间时并不改变流向，进而向侧面滑入一个按流线螺旋角放置的倾斜腔中。如果需要的话，后面可以接一个扩压器。流线运动的螺旋角是按照环量不变定律得出的。按此定律，外面流线的角度比里面的小。对排出口要选择一个适当的平均角度。如果am为流线与轴线垂直的平面夹角的平均值，则出口宽度为：&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;                                     b=sina&l;sub&g;m&l;/sub&g;πd&l;sub&g;m&l;/sub&g;&l;/span&g;&l;/p&g; &l;p&g; &l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;这种设计特别适用于轴流通风机，图183是作者试验模型的照片。&l;/span&g;&l;/p&g;

&l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;   如果蜗壳在两个轴圆筒之间的空间中沿轴线方向延伸，就得到一种有趣的结构形式。由于它是用圆柱形筒体围成，光从结构上来看，这种型式就有优点。因cu到处相等，所以其侧壁尺寸必须与进气弧段的大小成正比加大。在计算中采用cu的平均值。令b表示进气弧段角为φ时的蜗壳侧向宽度，h为蜗壳高度，则b=（v/c&l;sub&g;u&l;/sub&g;h）*（φ°/360）&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:16px;&quo;&g;    为了使空气在进入蜗壳时充满蜗壳到蜗壳的外径处，空气在舌头之前已经分流。因此如图181所示，在φ°角范围内流入的流量将通过整个蜗壳。由于这些蜗壳狭长的矩形截面，二次流会引起很大的损失。如果像作者建议的那样，用隔板把横向流道再进行分隔，这些损失就可以避免。为了清楚起见在图181上特将圆柱截面ab展开。利用两个如导叶的隔板使空气在离开叶轮后立即侧向分道流出，并且不受叶轮影响的被引入到一个预先经过很好的设计流道中。图181展示出了这样一种被分隔成正方形截面流道的形式。&l;/span&g;&l;/p&g; &l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/1667100987768.png&quo;syle=&quo;widh:354px;heigh:558px;&quo;/&g;&l;/p&g;

&l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/风机01.jpg&quo;syle=&quo;widh:540px;heigh:1200px;&quo;/&g;&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;风机系统性能不佳的原因一般包括：&l;/p&g; &l;psyle=&quo;magin:0px0px0px24px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;1)&l;spannew=&quo;&quo;syle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;imes=&quo;&quo;&g;     &l;/span&g;出口风道连接不当&l;/p&g; &l;psyle=&quo;magin:0px0px0px24px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;2)&l;spannew=&quo;&quo;syle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;imes=&quo;&quo;&g;     &l;/span&g;进口气流不均匀&l;/p&g; &l;psyle=&quo;magin:0px0px0px24px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;3)&l;spannew=&quo;&quo;syle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;imes=&quo;&quo;&g;     &l;/span&g;风机进口处产生涡流&l;/p&g; &l;psyle=&quo;magin:0px0px0px24px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;4)&l;spannew=&quo;&quo;syle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;imes=&quo;&quo;&g;     &l;/span&g;实际管网系统与设计管网系统相差太大&l;/p&g; &l;psyle=&quo;magin:0px0px0px24px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;5)&l;spannew=&quo;&quo;syle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;imes=&quo;&quo;&g;     &l;/span&g;风机参数的裕量不合理&l;/p&g;

&l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;   当系统阻力曲线高于设计值的时候，风机的实际工作点往左上方移动，由点0到点1，会导致风机的实际压力比设计值要高，风机的实际流量比设计值要小。&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;当风机的实际压力接近风机的极限压力的时候，风机运行就不稳定，风机就会发生失速现象。&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;由此可见，风机下面的性能问题都可能是由于系统阻力过高造成的：&l;/p&g; &l;ulclass=&quo;lis-paddinglef-1&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:1.2em;ouline:0px;max-widh:100%;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;风机失速&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;风机流量不足&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;这种情况下，解决问题需要降低系统阻力，可采取下面的措施：&l;/p&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;fon-family:wingdings;&quo;&g;²&l;/span&g;全开系统中的风门&l;/p&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;fon-family:wingdings;&quo;&g;²&l;/span&g;清洗系统堵塞的情况，降低阻力&l;/p&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;fon-family:wingdings;&quo;&g;²&l;/span&g;检查系统漏风的情况&l;/p&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;fon-family:wingdings;&quo;&g;²&l;/span&g;开大风机的调节挡板&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;同理，当系统阻力曲线低于设计值的时候，风机的实际工作点往右上方移动，由点0到点2，会导致风机的实际压力比设计值要低，风机的实际流量比设计值要大。&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;这种情况下，电机可能出现过载情况。&l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;/p&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;因此，风机下面的性能问题都可能是由于系统阻力过低造成的：&l;/p&g; &l;ulclass=&quo;lis-paddinglef-1&quo;syle=&quo;magin:0px;padding-igh:0px;padding-lef:1.2em;ouline:0px;max-widh:100%;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;lis-syle-ype:squae;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;lisyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;电机过载&l;/p&g; &l;/li&g; &l;lisyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;clea:boh;min-heigh:1em;&quo;&g;风机压力上不去&l;/p&g; &l;/li&g; &l;/ul&g; &l;psyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;这种情况下，解决问题需要增加系统阻力，可采取下面的措施：&l;/p&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;fon-family:wingdings;&quo;&g;²&l;spannew=&quo;&quo;syle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;imes=&quo;&quo;&g;  &l;/span&g;&l;/span&g;减小系统中的风门开度&l;/p&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;fon-family:wingdings;&quo;&g;²&l;spannew=&quo;&quo;syle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;imes=&quo;&quo;&g;  &l;/span&g;&l;/span&g;向其他应用供风&l;/p&g; &l;psyle=&quo;magin:0px0px0px28px;padding:0px;ouline:0px;max-widh:100%;clea:boh;min-heigh:1em;colo:gb(34,34,34);fon-family:sysem-ui,-apple-sysem,blinkmacsysemfon,&quo;helveicaneue&quo;,&quo;pingfangsc&quo;,&quo;hiaginosansgb&quo;,&quo;micosofyaheiui&quo;,&quo;micosofyahei&quo;,aial,sans-seif;fon-size:17px;lee-spacing:0.544px;ex-align:jusify;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;&g;&l;spansyle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;fon-family:wingdings;&quo;&g;²&l;spannew=&quo;&quo;syle=&quo;magin:0px;padding:0px;ouline:0px;max-widh:100%;box-sizing:bode-box!impoan;oveflow-wap:beak-wod!impoan;&quo;imes=&quo;&quo;&g;  &l;/span&g;&l;/span&g;关小风机的调节挡板&l;/p&g;

&l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;我们可以在通风机内部构成蜗壳，通过这种办法使空气围绕叶轮流动并将气流分配到叶轮的一侧或两侧。根据环量不变定律，气流速度的周向分量因此会加大，这样就会得出一种尺寸很小的蜗壳。因空气沿着圆盘以更大的速度流动，故叶轮摩擦减少，蜗壳中摩擦的作用距离也比普通蜗壳中短很多。上述原因带来的好处被由于较大的速度引起的摩擦损失的增加所抵销，究竟抵消掉多少？还说不出一个正确的数值来，对于流量系数小的叶轮，常常使用内蜗壳结构。内蜗壳除了能获得结构紧凑的装置外，还可使机壳结构做成圆柱形，这是它的优点。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;可以根据图示进行计算。首先，必须具有φ&l;sub&g;0&l;/sub&g;角度范围的这样一段舌状部分。空气将在这个角度范围中进入外矩形截面（&l;sub&g;0&l;/sub&g;&squo;-&l;sub&g;0&l;/sub&g;）（b&l;sub&g;0&l;/sub&g; b）。此时，&l;b/&g;                                 φ&l;sub&g;0&l;/sub&g;=(c0u/c0m)（b&l;sub&g;0&l;/sub&g; b）/bin&l;sub&g;0&l;/sub&g;&squo;/&l;sub&g;0&l;/sub&g;&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;&l;sub&g;对应于&l;/sub&g;φ&l;sub&g;0角范围中的流量公式vφ0=&l;/sub&g;vφ0&squo;/360很容易计算出来，从这个角度开始，气流排到内矩形蜗壳中，此时再使用方程进行计算，由此很容易算出内螺线。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;                                  in/&l;sub&g;0&l;/sub&g;=φ(c0m/c0u)b&l;sub&g;0&l;/sub&g;/b&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;在这种蜗壳中，气流的出口速度有时相当高，这样可能在出口处配置一只扩压器。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/1664679573497.png&quo;syle=&quo;widh:523px;heigh:332px;&quo;/&g;&l;/span&g;&l;/p&g; &l;p&g; &l;/p&g;

&l;p&g;这种情况也能作精确计算，其公式为：&l;/p&g; &l;p&g;                               d/2=φ{（&l;sub&g;0&l;/sub&g; （d/2））v/360πc&l;sub&g;0u&l;/sub&g;&l;sub&g;0&l;/sub&g;-{φv/720πc&l;sub&g;0u&l;/sub&g;&l;sub&g;0}&l;/sub&g;&l;sup&g;&l;spansyle=&quo;fon-size:10.8333px;&quo;&g;2&l;/span&g;&l;/sup&g;}&l;sup&g;0.5&l;/sup&g;&l;/p&g; &l;p&g;因公司太复杂，不适于实际计算，而以一个简单地近似公式来代替。c&l;sub&g;u&l;/sub&g;沿径向变化为双曲线，即c&l;sub&g;u&l;/sub&g;=c&l;sub&g;0u&l;/sub&g;&l;sub&g;0&l;/sub&g;/。如果蜗壳截面直径d与蜗壳总直径相比不是太大，则圆截面上的双曲线轨迹非常平坦。假设轨迹为直线，则整个圆截面的平均速度就等于截面重心上的速度，亦即&l;/p&g; &l;p&g;                                        c&l;sub&g;av&l;/sub&g;=c&l;sub&g;0u&l;/sub&g;&l;sub&g;0&l;/sub&g;/（&l;sub&g;0&l;/sub&g;  d/2）&l;/p&g; &l;p&g;这种假设在大多数情况下是正确的，因此我们得出&l;/p&g; &l;p&g;                                        φ/360v=π/4d2/c&l;sub&g;av&l;/sub&g;&l;/p&g;

&l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;（1）消声器长度≤1000mm。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;（2）消音器要求工艺先进，阻力损失≤300pa，再生噪声低，流速≤15m/s；消声值≥30db（a），设备1米外噪声值＜85db（a），如果干扰噪声大于规定值，则卖方进行隔声处理，采取措施保证其噪声符合标准，产生的费用由卖方承担。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;（3）消音材料采用超细玻璃棉，容重35kg/m³。&l;/span&g;&l;/p&g; &l;p&g;&l;spansyle=&quo;fon-size:18px;&quo;&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/1664678628830.png&quo;syle=&quo;widh:336px;heigh:257px;&quo;/&g;&l;/span&g;&l;/p&g;

&l;p&g;&l;imgal=&quo;&quo;sc=&quo;/public/usefiles/images/风机研究中心.png&quo;syle=&quo;widh:704px;heigh:444px;&quo;/&g;&l;/p&g; &l;p&g;高新技术企业，风机行业定点研究单位，为大国重器贡献力量。&l;/p&g;