Abstract:Zhejiang Beilun Power Plant unit No.1 was put into operation in 1991. Due to worse coal condition and increasing heat load, pulverizer load was increased accordingly. Which caused reducer overload, gear damage, thrust pad temperature rise and other problems. Thus the power plant planned to extend pulverizer capacity. After disassembled one reducer and analyzed gear damage, parts characteristics was outlined, improvement plan was made. 

Keywords:reducer, bevel wheel, spiral bevel gear, planet gear, gear coupling, antifriction bearing