Matters needing attention for failure of roller bearing due to vibration

A small part of the bearing raceway and rolling body may be damaged. In operation, local damage due to operation or installation errors. Rolling over the damaged bearing parts will produce a specific vibration frequency, and the vibration frequency analysis can identify the damaged cylindrical roller bearing parts. in many applications, the stiffness of the bearing is the same as that of the surrounding structure. Because of this feature, as long as the bearing (including preload and clearance) and its configuration in the application are selected correctly, it is possible to reduce the vibration in the application.

The rolling bearing in the bearing itself does not produce noise, and it is usually felt that the bearing noise is in fact the sound effect of the bearing directly or indirectly vibrating with the surrounding structure, and the number of rollers bearing the load will change slightly in operation. this is why many times the noise problem can be regarded as a vibration problem related to the whole cylindrical roller bearing application. Excitation caused by a change in the number of loaded rollers when a radial load is loaded on a bearing. The resulting vibration is unavoidable but can be mitigated by axial preloading, which is applied to all rollers.

The bearing ring may be deformed in accordance with the shape of the adjacent parts, and if there is deformation, the waviness of the parts may produce vibration in operation when there is a close match between the bearing ring and the bearing housing or the transmission shaft, therefore, it is important to machine the bearing housing and the transmission shaft to the required tolerance.

Contact fatigue failure refers to the failure of the bearing working surface caused by alternating stress. Contact fatigue spalling occurs on the bearing working surface, which is often accompanied by fatigue cracks. It first occurs at the place of large alternating shear stress below the contact surface, and then spreads to the surface to form different spalling shapes, such as pitting corrosion or pitting spalling, which is called shallow spalling. Wear failure refers to the failure caused by the continuous wear of the metal on the working surface caused by the relative sliding friction between the surfaces. The continuous wear will cause the bearing parts to be damaged gradually, and eventually lead to the loss of dimensional accuracy of cylindrical roller bearings and other related problems. Wear may affect the change of shape, the increase of fit clearance and the change of working surface topography. It may affect the lubricant or make it contaminated to a certain extent, resulting in a complete loss of lubrication function, resulting in the loss of rotation accuracy and even the normal operation of cylindrical roller bearings. Wear failure is one of the common failure modes of all kinds of bearings, which can be divided into common abrasive wear and adhesive wear according to the wear form.

1. It is the running track of the outer ring when the cylindrical roller bearing used in the inner ring rotating load is correctly added with the radial load.

2. It is the running track of the relative inclination of the inner ring and the outer ring, the larger deflection of the shaft, the track of the raceway surface, which produces a light in the longitudinal direction at the exit of the load ring, and the running track is inclined, and the double-row tapered roller bearings make the inner ring rotate.

3. Represents the running track of the outer ring when only the radial load is borne. L represents the trajectory when only the axial load is applied. When the inner ring and the outer ring are relatively inclined and bear only the radial load, the running trajectory deviates from the two rows of rail planes 180. The position (m) of.