Analysis and treatment of high temperature of bearing of primary air fan motor in 660MW singleseries unit

Abstract

Abstract:

During the debugging of the 660MW singleseries unit of Ningxia Guohua Ningdong Power Generation Company Limited, the temperature of the bearing of the primary fan motor is high and there is a risk of forced shutdown. Checking the bearing at the motor drive end after the shutdown, it was found that the bearing wear was serious and the assembly clearance of the bearing was unreasonable. Adjusting the gap between the bearings edges, adjusting the coaxial degree between the pressure packing cover and the shaft, and increase the diameter of the fuel charging throttle valve plate, can effectively eliminate the phenomenon of the motor bearing high temperature, which ensures the safe and stable operation of unit.

Key words:

singleseries unit, primary air fan, bearing, temperature, clearance

CHEN Jianfei.

Analysis and treatment of high temperature of bearing of primary air fan motor in 660MW singleseries unit

[J]. Huadian Technology, 2018, 40(6): 58-59.

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Analysis and treatment of high temperature of bearing of primary air fan motor in 660MW singleseries unit

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