Whether the correct installation of bearings, related to the service life of the bearings, so we must pay attention to the following bearing encyclopedia to detail the correct installation of bearings of the five steps, I hope you are using the bearings to help.

01 Use special tools for bearing mounting and dismounting

Advanced installation tools, can avoid installation due to improper tools and operations brought about by bearing damage. For example, when installing bearings, the staff had used copper rod knock-in method, easy to cause bearing axial force is not uniform, causing cage deformation, rolling body damage, clearance becomes larger, and copper rod in the knocking process, copper end fly into the bearing cage, easy to cause bearing failure.

02 Do a good job of bearing inspection before installation

For the old bearing, need to check whether the ball (column) surface burrs, scratches, cracks. Whether the radial clearance and axial clearance of the old bearing are qualified, generally only the radial clearance is measured. For new bearings, first check whether the bearing model is correct. For example: model 6318 deep groove ball bearings, bearing inner diameter 90mm, the radial clearance range of 0.016-0.046mm, can also be found in the shaft of the large wear amount of 0.25mm.

03 Check the bearing and rotor shaft fit size

When the motor is assembled, it is also necessary to carefully check the matching dimensions of the bearing and the rotor shaft when the bearing is installed, and the matching dimensions of the outer ring of the bearing and the hole of the end cover.

04 Control the quantity of oil in the bearing and bearing chamber

Bearing and too much oil in the box will cause the bearing rolling body slippage, resulting in rolling body from rolling friction to sliding friction, damage to the bearing rolling body, due to too much bearing oil, the bearing box free space is small, the bearing operating temperature will rise, the grease Herd reduces the lubricating oil film of the rolling body becomes thin, lubrication conditions are poor, easy to cause the bearing noise, the surface of the loss of slippage, shorten the life of the bearing. General motor end cover side with bearing oil chamber (designed as a double sealed bearing motor exceptions), according to the speed of the motor, the bearing chamber can be injected oil volume can refer to the following standards: motor speed <1500r/min, the amount of oil for the bearing chamber volume of 2/3, speed between 1500-3000r/min for the bearing chamber volume of 1/2. speed >3000r/min, the bearing chamber should be less than or equal to the volume of the bearing. In the actual working process, for the high temperature and high speed running bearings, the bearings with sealing surfaces should be used as little as possible, increase the amount of oil stored in the motor oil cover, and install refueling nozzles, which can improve the operating life of the motor bearings.

05 Pay attention to ensure that the insulation is intact

For the outer ring has insulation design bearing, need to pay attention to ensure that the insulation is intact. If the installation of the bearing insulation is destroyed, the thin bearing oil film will be shaft voltage breakdown, oil film breakdown, not only make the rolling body lubrication conditions are poor, at the same time produce electric sparks on the bearing rolling body formation of galvanic corrosion, caused by the rolling body surface is not light, accelerating the wear of bearings.