Analysis and Treatment of DG500-180 Feed Water Pump Vibration

Through analyzing the vibration mechanism,the paper finds out the main reason of DG500-180 feed water pump bearing vibration is the rub and impact between guide vanes and impeller hubs.After increasing the clearance between them,four same-type pumps which occurred same problem has been solved.It has important reference for eliminating vibration in other multi-stage pumps.