In general, as the world's top imported bearings imported bearings will not happen excitation. Once occurred. It should be good to check. Today, we have to expose the truth imported under the bearing excitation.
Load changes in the number of rolling element excitation
When a radial load to load an imported bearings, the number of load bearing rolling element in the operation of a slight change: this is caused by the offset of the load direction. The resulting vibration is inevitable, and mitigation, but can be pre-loaded by axial load for cylindrical roller bearings in all the rolling element (not).
Wave of components
In the case of the close tie between the imports and imports bearing ring bearing or drive shaft, import bearing ring may be compatible with the adjacent parts of the shape and deformation. If the deformation, it may lead to vibration in the running. Therefore, the imported bearing and the shaft machined to the required tolerance is very important.
Local damage
Since the operation or installation errors, the small portion of imports bearing raceway and rolling element may be damaged. Running, rolling across the damaged imported bearing components will have the specific vibration frequency. The frequency analysis can identify the imported bearing components damaged.
The vibration behavior of the applications
In many applications, imports bearing stiffness and the stiffness of the surrounding structures. Because of this characteristic, correctly select the imported bearings (including pre-load and clearance) and its configuration in the application, it is possible to reduce vibration applications.
There are three ways to reduce the vibration of imported bearings
Removed from the application of critical incentive vibration; suppressing resistance to stimulate critical excitation vibration parts and resonance between components; to change the stiffness of the structure, thus changing the critical frequency.



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