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Common troubleshooting measures for bearing operation

There are two major reasons for bearing breakage: defects and overload. When the applied load exceeds the material strength limit and the part is broken, it is called overload fracture. During the operation of the bearing, defects such as overheating tissue and local burn will also occur, causing defect fracture.

During the operation of the bearing, sometimes hard particles or hard foreign objects or abrasive particles on the metal surface will be squeezed between the bearing surfaces. This will cause furrow-like abrasion caused by the bearings. These hard foreign objects enter the bearing interior through the lubricant medium. With the continuous operation of the bearing, local friction generates heat, which is likely to cause local deformation of the friction surface and friction micro-welding, and even local melting may occur, causing occlusion.

Generally speaking, the bearings themselves do not produce noise. What we call noise is actually the sound effect of bearing directly or indirectly vibrating with surrounding structures.

Excitation due to the change in the number of loaded rolling elements When a radial load is applied to a bearing, the number of rolling elements that carry the load will change slightly during operation, that is: 2-2-3-2 ... This causes a shift in the load direction. The resulting vibration is unavoidable, but can be mitigated by axial preload, and is applied to all rolling elements (not suitable for cylindrical roller bearings in bearings).

In the case where the wave of the component is closely fitted between the bearing ring and the bearing housing or the transmission shaft, the bearing ring may be deformed in accordance with the shape of the adjacent component. If deformation occurs, vibration may occur during operation. Therefore, it is important to machine the bearing block and drive shaft to the required tolerances.

Local damage Due to operation or installation errors, a small number of bearing raceways and rolling elements may be damaged. During operation, rolling through damaged bearing components generates specific vibration frequencies. Vibration frequency analysis can identify damaged bearing components. Vibration behavior in applications In many applications, the stiffness of a sliding bearing is the same as the stiffness of the surrounding structure. Because of this feature, as long as the bearing (including preload and clearance) is properly selected and its configuration in the application, it is possible to reduce the vibration in the application.


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