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Application of low noise bearings

Application of low noise bearings


Although the noise is essentially caused by manufacturing errors, it is actually related to the selection of lubricants, the mounting conditions of the bearings, and the accuracy of the shaft and bearing seat.This kind of noise is further divided into cage sound and vibration pattern sound as follows:


(1) cage sound and its control method


The cage sound refers to the periodic vibration and noise caused by the impact of the cage and the rolling body. 


This noise occurs mainly in ball bearings and tapered roller bearings, stamping and cage and entities cage will occur, when the use of grease or oil lubrication will happen, but when bad lubrication or lubricant used, big radial clearance, outer torque under load, and keep the bad frame structure and the precision is not high, the more likely to occur, serious when maintains a web or rivet head suddenly fracture. 


Methods of controlling cage noise and vibration are as follows.Use lubricants with good lubrication performance;Reduce bearing mounting errors;The radial clearance of the compressed bearing may be properly pretightened in the axial direction, and the bearing with a good precision and reasonable structure of the cage shall be selected, or the bearing with a strong cage and no wear shall be replaced.


(2) vibration pattern sound and its control method


Vibration striation is a noise directly related to the ripple of the rolling surface of the bearing. It is a pure tone noise. For a constant speed, its frequency is unchanged, while for a changing speed, its frequency is also changed.

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