The truth of bearing exciting


Excitation load changes in the number of rolling element
When a radial load is loaded on a particular bearing, and the number of rolling elements in the load bearing run, a slight change, namely: This causes the offset of the load direction. The resulting vibration is unavoidable, but by axially pre-loading to reduce, and loaded on all the rolling bodies (not for the cylindrical roller bearing).

Member waviness
Case the snug fit between the bearing ring and the bearing or shaft, the bearing ring may be fitted with the adjacent parts of the shape is deformed. If a deformation occurs, in operation, it may lead to vibration. Therefore, the bearing block and the drive shaft for machine processing to the required tolerances is very important.

Partial damage
Due to the operation or installation errors, a small part of the bearing raceways and rolling elements may be damaged. In operation, the rolling across the damaged bearing member will produce a particular frequency of vibration. Vibration frequency analysis can identify the damaged bearing member.

The vibration behavior of the applications
In many applications, the bearing stiffness and the stiffness of the structure around the same. Due to this feature, as long as the correct choice of the bearings (including the pre-load and clearance) in the application configuration, it is possible to reduce the vibration of the application.

There are three ways to reduce the vibration NSK Bearings
Remove from the application of the critical excitation vibration; suppressing resistance excite the critical incentive vibration components and resonance between components of; changing the stiffness of the structure, thus changing the critical frequency.

 


<>The truth of bearing exciting

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