Water pump motor bearing fault analysis and processing method of sound

1, the fault analysis because of using motor original NU type column bearing allows motor has certain axial momentum. Guard on both sides of the bearing outer ring, inner ring no guard, so allow rotation two-way displacement, relative bearing outer ring can withstand axial elongation caused by thermal expansion. At the same time, the bearing clearance is relatively large deep groove ball bearings, but the stress of the bearing is linear, better than the point force of deep groove ball bearing. Bearing trajectory is not a circle, but an ellipse. Bearing stress is mainly in the lower part, column for deep groove bearing its stress points is a straight line, high-speed operation, due to the bearing clearance, stress change of stress trajectory into a parabolic curve. 2 feed water pump motor run time, processing method, mainly by the axial force, stable and drag load bearing deep groove column allows the motion of the radial necessity is abate, so the front bearing replacement for deep groove ball bearings, bearing clearance is still the C3, about 0. 4 mm, can meet the operation requirements. At the same time considering the expansion of the bearing, in oil baffle ring plus a small cover thickness is about 0. 8 mm gasket, overcome from the feed water pump and bearing temperature rise caused by axial channeling. Bearing rolling element and raceway of micro table is rough, sports can produce a certain impact, but the impact of pulse is high frequency, thus using vibration of high frequency interference measure running motor parameter value is bigger than standard. Deep groove column bearing contact with the raceway is more, the high-frequency is big, and deep groove ball bearing and raceway contact points, the high frequency impact is relatively small, so in this case the motor bearings, deep groove ball bearings instead of column can be used to solve a sound equipment. Will deep groove column bearing replacement for deep groove ball bearings, bearing sound disappeared. Running for a period of time no longer appear noise, has reached the requirement of motor vibration amplitude, loading performance is stable, have no current volatility.