Fault Diagnosis of Centrifugal Fan--Part 2 High Bearing Temperature

There are 3 reasons to cause abnormal temperature rising for centrifugal fan bearing, such as poor lubrication, insufficient cooling, abnormal bearing.  

If the bearing temperature rising by bearing fatigue wear, such as dehull, pockmark, gap increasing, it can be judged by listening bearing sound and testing vibration. 

coupling drive centrifugal fan of xianrun blower

(1) Poor lubrication. It needs to oil bearing box regularly. Oiling too much can also cause bearing temperature rising. In this case, bearing temperature rises continuously,then the temperature will remain unchanged after reaching to certain point (generally higher than the normal operating temperature around 10 degree centigrade to 15 degree centigrade), finally the bearing temperature will decline gradually. (xianrun blower)

(2) Insufficient cooling.Too small cooling fan will cause insufficient cooling air volume. Bearing box does not get effective cooling, so the bearing temperature rises.

(3) Check the bearing box again after eliminate the above problems.

high pressure coupling centrifugal fan of xianrun blower