Causes Of Vibration Of Ntn Tapered Roller Bearing In Operation

Generally speaking, the rolling bearing itself does not produce noise. The commonly felt “noise of NTN tapered roller bearing” is actually the sound effect of vibration，between the bearing and the surrounding structure directly or indirectly. This is why many times the noise problem can be regarded as a vibration problem involving the whole tapered roller bearing application.

Ntn Tapered Roller Bearing

Excitation caused by the change of the number of loaded rolling elements，When a radial load is loaded on an imported bearing, the number of rolling elements bearing the load will change slightly during operation, i.e. 2-3-2-3 This causes an offset in the direction of the load.
The resulting vibration is inevitable, but can be reduced by axial preloading, which is applied to all rolling elements (not applicable to cylindrical roller bearings).
Waviness of components：In the case of close fit between tapered roller bearing ring and bearing seat or transmission shaft, tapered roller bearing ring may be deformed by matching with the shape of adjacent components.
If deformation occurs, vibration may occur during operation. Therefore, it is important to machine the bearing pedestal and drive shaft to the required tolerances.

Local damage：Due to incorrect operation or installation, a small number of tapered roller bearing raceways and rolling elements may be damaged. In operation, rolling over damaged NTN tapered roller bearing components will produce specific vibration frequencies. Vibration frequency analysis can identify damaged bearing components.
In many applications, the stiffness of NTN tapered roller bearings is the same as that of the surrounding structure. Because of this feature, as long as the correct selection of NTN tapered roller bearing (including preload and clearance) and its configuration in application, it is possible to reduce the vibration in application.

There are three ways to reduce vibration:

remove critical excitation vibration from the application;
suppress the critical excitation vibration between the excitation part and the resonance part;
change the stiffness of the structure to change the critical frequency.

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Causes Of Vibration Of Ntn Tapered Roller Bearing In Operation

Ntn Tapered Roller Bearing

There are three ways to reduce vibration:

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