被人忽略的四大原因导致高精密轴承产生振动型损伤 1、因加载滚动体数量变

The four major causes that have been neglected have caused vibration-type damage to high-precision bearings. 1. Excitation <br><br>due to the change in the number of loaded rolling elements. <br><br>When a radial load is loaded on a bearing, the number of rolling elements carrying the load is in operation There will be a slight change, namely: 2-3-2-3 ... This causes a deviation in the load direction. The resulting vibration is inevitable, but it can be reduced by axial preloading, which is applied to all rolling elements. <br><br>2. Local damage <br><br>Due to operation or installation errors, a small part of the bearing raceways and rolling elements may be damaged. During operation, rolling over damaged bearing components will produce a specific vibration frequency. Vibration frequency analysis can identify damaged bearing components. This principle has been applied to XEZ condition monitoring equipment to detect bearing damage. <br><br>3. The accuracy of the relevant components <br><br>may be deformed due to the shape of the adjacent components when the bearing ring is closely matched with the bearing seat or the transmission shaft. If deformation occurs, vibration may occur during operation. Therefore, it is important to machine the bearing housing and the drive shaft to the required tolerances. Please refer to the section "Dimension, shape and running accuracy of the bearing base and support". <br><br>4. <br><br>If the pollutants operate in a polluted environment, the impurities may enter the bearings and be crushed by the rolling elements. The degree of vibration generated depends on the number, size and composition of the crushed foreign particles. Although it does not produce the typical frequency form, it can hear an irritating noise.

被人忽略的四大原因导致高精密轴承产生振动型损伤 <br><br>1、因加载滚动体数量变化而产生的激振<br><br>当一个径向负荷加载于某个轴承时，其承载负荷的滚动体数量在运行中会稍有变化，即：2-3-2-3.... 这引起了负荷方向的偏移。由此产生的振动是不可避免的，但可通过轴向预加载来减轻，加载于所有滚动体。<br><br>2、局部损坏<br><br>由于操作或安装错误，小部分轴承滚道和滚动体可能会受损。在运行中，滚过受损的轴承部件会产生一特定的振动频率。振动频率分析可识别出受损的轴承部件。此原理已被应用在XEZ状态监测设备，用来探测轴承损坏状况。<br><br>3、相关部件的精度<br><br>在轴承圈与轴承座或传动轴之间密配合的情况下，轴承圈有可能与相邻部件的外形相配合而变形。如果出现变形，在运行中便可能产生振动。因此，把轴承座和传动轴进行机加工到所需的公差很重要，请参看“轴承底座和支座的尺寸、形状和运转精度”一节。<br><br>4、污染物<br><br>如果在污染环境中运行，杂质可能会进入轴承并被滚动体碾压。产生的振动程度取决于被碾压的杂质颗粒的数量、大小和成分虽然不会产生典型的频率形式，但可以听得见一种扰人的噪音。

Four neglected reasons lead to vibration damage of high precision bearing<br>1. Excitation due to the change of the number of loaded rolling elements<br>When a radial load is loaded on a bearing, the number of rolling elements bearing the load will slightly change in operation, that is: 2-3-2-3.... this causes the load direction deviation. The resulting vibration is inevitable, but can be reduced by axial preloading, which is applied to all rolling elements.<br>2. Local damage<br>Due to incorrect operation or installation, a small number of bearing raceways and rolling elements may be damaged. In operation, rolling through the damaged bearing parts will produce a specific vibration frequency. Vibration frequency analysis can identify damaged bearing components. This principle has been used in xez condition monitoring equipment to detect bearing damage.<br>3. Accuracy of related parts<br>When the bearing ring is closely matched with the bearing seat or transmission shaft, the bearing ring may be deformed by matching with the shape of adjacent components. In case of deformation, vibration may occur during operation. Therefore, it is important to machine the bearing pedestal and drive shaft to the required tolerances, refer to the section "dimensions, shape and running accuracy of bearing pedestal and support".<br>4. Pollutants<br>If operating in a contaminated environment, impurities may enter the bearing and be rolled by the rolling element. The vibration degree depends on the number, size and composition of the crushed impurity particles. Although the typical frequency form will not be generated, a disturbing noise can be heard.<br>