Abstract:

Abstract:Taking Shenhua Guangdong Guohua Yudean Taishan Power Generation Company Limited as an example,this paper analyzed the reason of the abnormally increased motor bearing temperature for axial flow fan after the runback (RB) experiment.It is considered that the motor shaft shoulders have great problems when the fan working under special conditions and the root cause is the heat expansion impediment phenomenon of the motor shafting.After some treatments,the hidden danger is thoroughly eliminated,and which ensures the safe and steady operation of the induced draught fan under any conditions.

Key words: Keywords:axial flow fan;runback, motor bearing;abnormal temperature;heat expansion impediment