How to reduce motor bearing fault 2

According to installation process standard installation bearing

1. Use bearing installation remove special tool

The advanced installation tools, can avoid installation due to the tools and improper operation bring bearing damage. For example, installation bearing, staff have the copper rod knock-in method, easy cause bearing axial force is uneven and cause cage deformation, rolling element damage, clearance change, and copper rod in stroke process, at the end of the copper air bearing cage inside, easy cause bearing fault.

2. Before the installation completes the bearing of the inspection work

For the old bearing, need to check the ball (column) surface whether there is burr, scratch, crack. Old bearing radial clearance, axial clearance is unqualified, generally only measurement radial clearance. For new bearing, first to check bearing model is correct. Rolling bearing radial clearance standards refer to table 1. For example: the model 6318 deep groove ball bearings, bearing inside diameter of 90 mm, the radial clearance a range of 0.016 ~ 0.046 mm, also can check to bearing maximum wear is 0.25 mm.

3. Check the bearing and rotor shaft fit size

Motor assembly, still need to carefully check bearing installation bearing and rotor shaft fit size (table 2), bearing ring and shell cover the hole with size.

4. Good control of the bearing and the bearing indoor oil quantity

The oil bearing and overmuch, can cause bearing rolling body sliding, caused by the rolling friction roller body variable sliding friction, damaged bearing rolling body, because too much oil bearing, bearing the free space is small, the operation of the bearing temperature will rise, grease Hector degree is reduced, rolling element lubricating oil film thin, and the bad lubrication condition, easy cause bearing different tone, the surface of sliding, shorten the service life of bearing. General motor end cover side has bearing oil chamber (design into double seal bearing motor exception), according to the motor speed, the bearing chamber can be oil quantity can refer to the following standards: motor speed < 1500 r/min, the fuel charge for bearing chamber volume of two-thirds. Speed in the 1500 ~ 3000 r/min for the bearing chamber volume between the 1/2.