Cylindrical roller bearing vibration generating failure precautions

Small localised bearing raceways and rolling elements may be damaged. In operation, localised damage is due to operational or mounting errors. Vibration frequency analysis can identify damaged cylindrical roller bearing components. Due to this feature, it is possible to reduce vibration in applications provided that the bearings (including preload and clearance) and their configuration in the application are selected correctly.

The rolling bearings in a bearing do not generate noise themselves, and the bearing noise is usually felt as an acoustic effect of the bearing vibrating directly or indirectly with the surrounding structure. The number of rolling elements carrying the load varies slightly during operation, which is why many times the noise problem can be seen as a vibration problem involving the entire cylindrical roller bearing application, with the excitation due to changes in the number of loaded rolling elements when a radial load is loaded on a particular bearing. The resulting vibration cannot be prevented but can be mitigated by axial preloading, which is applied to all rolling elements.

The bearing ring may be deformed with the shape of the adjacent components, if there is a deformation, the wave degree of the components in the bearing ring and bearing housing or drive shaft between the case, the operation may produce vibration, therefore, the bearing housing and drive shaft for machining to the required tolerance is very important.

Contact fatigue failure refers to the bearing work surface by the role of alternating stress and failure, contact fatigue spalling occurs in the bearing work surface, often accompanied by fatigue cracks, first from the contact surface below the large alternating tangential stress, and then extended to the surface to form different spalling shape, such as pitting or pitting spalling, spalling into small pieces called shallow spalling, wear loss effect refers to the surface between the relative Sliding friction leads to its work surface metal constantly wear and failure. Continued wear will cause bearing parts gradually damage, and eventually lead to cylindrical roller bearing dimensional accuracy loss and other related problems, wear may affect the shape change, with the clearance increase and work surface shape change, may affect the lubricant or make its pollution to a certain extent and cause lubrication function completely lost, thus making cylindrical roller bearing loss of rotational accuracy and even can not normal operation, wear loss effect is Various types of bearing common failure mode, according to the form of wear can usually be divided into common abrasive wear and adhesive wear.

1. is to the inner ring rotational load when the use of cylindrical roller bearings correctly plus the radial load when the outer ring running track.

2. is the inner circle and the outer circle relative tilt, shaft deflection of the larger running track, the running track of the raceway surface, in its longitudinal direction to produce thick faint in the load circle of the exit, the running track is tilted, double row tapered roller bearings so that the inner circle rotation.

3. said only burden radial load when the outer circle of the running track. l said only by the axial load when the track. In the inner circle and outer circle relative tilt large only bear radial load, its running track deviation in the two columns of track surface 180. position (m).