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The Reson of SKF Bearing Vibration

Source: FAG bearings  Tags: News

Many users have encountered many problems in using SKF bearings. Many problems occur in the use of SKF bearings. The staff of general machinery companies understand the knowledge of SKF bearings, know how to maintain bearings, and pay attention to the process of using bearings The matters are clear, some novices do not understand, just know to simply watch the machine running. Today we will introduce several phenomena of SKF bearings in machinery that will cause vibration and the reasons for the vibration.


Vibration behavior in applications

In many applications, the stiffness of SKF bearings is the same as that of surrounding structures. Because of this feature, as long as the SKF bearings (including preload and clearance) and their configuration in the application are selected correctly, it is possible to reduce the vibration in the application.

Waviness of SKF bearing components

In the case of a close fit between the SKF bearing ring and the SKF bearing housing or the drive shaft, the SKF bearing ring may deform due to the shape of the adjacent components. If deformation occurs, vibration may occur during operation. Therefore, it is important to machine the SKF housing and drive shaft to the required tolerances.

Excitation due to changes in the number of loaded rolling elements

When a radial load is loaded on a SKF bearing, the number of rolling elements carrying the load will change slightly during operation, that is, this causes a deviation in the load direction. The resulting vibration is inevitable, but it can be reduced by axial preloading, which is loaded on all rolling elements (not applicable to cylindrical roller SKF bearings).

Partial damage

Due to operation or installation errors, a small portion of SKF bearing raceways and rolling elements may be damaged. During operation, rolling over damaged SKF bearing components will produce specific vibration frequencies. Vibration frequency analysis can identify damaged SKF bearing components.
There are three ways to solve SKF bearing vibration or reduce vibration:

Remove critical excitation vibrations from applications
Suppression of critical excitation vibration between excitation and resonance components
Change the stiffness of the structure, thereby changing the critical frequency.