Bearing oscillation occurs

Source: China Bearing Network Time: 2018-02-03

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Generally speaking; the rolling bearing itself does not generate noise. The generally perceived "bearing noise" is actually the acoustic effect of the bearing oscillating directly or indirectly with the surrounding layout. This is why many time-division noise problems can be considered as involving the whole Oscillation problems in bearing use. Oscillation due to the change in the number of loaded tumblers. When a radial load is applied to a bearing; the number of tumblers carrying the load will be slightly changed during operation; ie: 2-3-2 -3. . . . This causes a shift in the direction of the load. The resulting oscillations are unavoidable; however, axial preloading can be used to mitigate oscillations; it should be applied to all rolling bodies (not applicable to cylindrical roller bearings).
1. The waviness of the component is in close cooperation between the bearing ring and the bearing seat or the drive shaft; the bearing ring can be deformed in cooperation with the shape of the adjacent component. If it is deformed, it can oscillate during operation; thus; It is important to machine the bearing housing and drive shaft to the required public service.
2. Partial damage due to handling or device failure; a small number of bearing raceways and roll bodies can be damaged. During operation; a specific oscillation frequency occurs when rolling over damaged bearing components. The oscillation frequency can be analyzed to identify Damaged bearing components.
3. The oscillating action in the use case is used in many applications; the stiffness of the bearing is the same as the stiffness of the surrounding layout. Because of this feature; only the correct selection of the bearing (including preload and clearance) and its equipment in use; Reduce the oscillations in use.
There are three ways to reduce the oscillation:
1. Remove the critical encouragement oscillation from use.
2. The suppression encourages oscillation between the excitation component and the resonance component.
3. Change the stiffness of the layout; then change the critical frequency.

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