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The cause of bearing vibration

The cause of bearing vibration

2021-04-25

On the vibration of bearings, many technicians have different views.Therefore, it is difficult to say that there is a correct comparison. Today, we will share with you the cause of bearing vibration.Individually speaking, the rolling bearing in the bearing itself does not produce music.Usually felt that the "bearing music" is in fact the bearing indirectly or indirectly with the surrounding structure vibration of the acoustic effect.This is why many times the music problem can be regarded as a vibration problem that touches all the use of bearings.Excitation caused by qualitative change in the number of loading rolling body.When a radial load is loaded on a bearing, the number of rollers carrying the load will be slightly changed in operation, that is: 2-3-2-3....This causes a shift in the direction of the load.The resulting vibration is not preventable, but can be aggravated by axial preloading on all rolling elements (not applicable to cylindrical roller bearings in bearings).When the waviness of the component is closely matched between the bearing ring and the bearing seat or the drive shaft, the bearing ring can be deformed by matching with the shape of the adjacent components.If deformation occurs, vibration can occur during operation.Therefore, it is important to machine the bearing housing and drive shaft to the required tolerances.

Partial damage Small parts of bearing raceways and rollers can be damaged due to operation or device companions.During operation, a specific vibration frequency occurs when rolling over a damaged bearing component.Damaged bearing parts can be identified by vibration frequency analysis.In many applications, the stiffness of the bearing is similar to that of the surrounding structure.Because of this feature, only the correct choice of bearings (including preload and clearance) and their configuration in use can reduce the vibration in use.There are three ways to reduce the vibration of bearings: 1. Remove critical encouraging vibration from use.2. Critical encouraging vibration between the suppression excitation part and the resonant part.3. Change the stiffness of the structure so as to change the critical frequency.

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