• 01 Use special tools for bearing installation and disassembly

• Advanced installation tools can avoid bearing damage caused by improper tool and operation during installation.For example, when installing bearings, if the copper rod is knocked into the method, it is easy to cause uneven axial force of bearings, cause deformation of cages, damage of rolling body, increase clearance, and in the process of knocking the copper rod, the copper flies into the bearing cage, which is easy to cause bearing failure.

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• 02 Check the bearings before installation

For old bearings, it is necessary to check whether there are burrs, scratches and cracks on the surface of the ball (column).Whether the radial clearance and axial clearance of old bearings are qualified, only the radial clearance is generally measured.For new bearings, first check whether the bearing type is correct.

03 Check the fit size of bearing and rotor shaft

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

04 Control the quantity of bearing and oil in bearing chamber

Bearing and the oil in the cabinet is overmuch, can cause bearing roller sliding, caused by the rolling friction sliding friction and rolling body damage bearing roller, because of the excessive amount of oil bearing, bearing in the free space is small, the operating temperature of the bearing will rise, grease hz degree is reduced, the lubricating oil film thinning, roller, and the bad lubrication condition is easy to cause bearing different sound, surface smooth, shorten the service life of bearing.

Generally, there is a bearing oil chamber at the end cover of the motor (except for the motor designed with double-sealed bearings). According to the speed of the motor, the amount of oil in the bearing chamber can be carried out according to the following standards: when the motor speed is less than 1500r/min, the amount of oil is 2/3 of the volume of the bearing chamber.When the speed is between 1500 ~ 3000r/min, it is 1/2 of the volume of the bearing chamber.When the speed is > 3000r/min, it should be less than or equal to 1/3 of the bearing volume.

05 Make sure the insulation is in good condition

For bearings with insulated outer rings, attention should be paid to ensure that the insulation is intact.If the bearing insulation is destroyed during installation, the thin bearing oil film will be broken down by the shaft voltage. After the oil film breakdown, not only the lubrication condition of the rolling body is poor, but also the electric spark generated will form electric corrosion on the bearing rolling body, causing not only the surface of the rolling body, but also the wear of the bearing.

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