What are the causes of noise during bearing use

wallpapers Industry 2020-12-08

During the use of bearings, noise is very normal and common. How to correctly understand the process and reasons for bearing noise is very important to prolong the service life of bearings.


1. Excitation caused by changes in the number of loaded rolling elements 

When a radial load is applied to a certain bearing, the number of rolling elements carrying the load will change slightly during operation, causing the deviation of the load direction.


2. Partial damage 

A small part of the bearing raceways and rolling elements may be damaged due to incorrect operation or installation. During operation, damaged bearing components will produce specific vibration frequencies. Vibration frequency analysis can identify damaged bearing components. This principle has been applied to condition monitoring equipment to monitor bearing damage.


3. Accuracy of related parts 

In the case of a close fit between the inner and outer rings of the bearing and the bearing seat or drive shaft, the inner and outer rings of the bearing may be deformed due to improper fit with the adjacent parts. If deformation occurs, vibration and noise may occur during operation.


4. Pollutants

If the equipment is operated in a polluted environment, impurities may enter the rolling elements of the bearing and cause vibration. In this case, a disturbing noise can usually be heard.


5. Other

The causes of noise produced by rolling bearings are more complicated. One is the wear of the mating surfaces of the inner and outer rings of the bearing. Due to this wear, the matching relationship between the bearing and the housing, the bearing and the shaft are destroyed, and the axis deviates from the correct position. The axis produces abnormal noise when it is moving at high speed.


In addition, insufficient bearing lubrication, the formation of dry friction, and bearing breakage will cause abnormal noise. Abnormal noise can also be caused by bearing wear and cage loosening and damage.


6.Different bearings have different noise levels

The noise of ball bearings is lower than that of roller bearings, and the (friction) noise of relatively sliding bearings is lower than that of relatively sliding bearings; those with more balls and thick outer rings have lower noise; use solid cages The noise of bearings is relatively lower than that of bearings with stamped cages; the noise of bearings with plastic cages is lower than that of bearings with the above two cages; bearings with high precision, especially those with higher rolling element precision, are The noise is relatively smaller than that of low-precision bearings; the noise of small bearings is relatively smaller than that of large bearings.


Wuxi Spark Bearing Co., Ltd is a complete, one-stop bearing supplier and manufacturer. All bearings products are qualified and have passed the ISO 9001 certification. We have more than 12 years of experience in bearings, please contact us if necessary, we will reply to you as soon as possible.