Whether the correct installation of the bearings, in relation to the service life of the bearing, so everyone one set should pay attention to, below bearing encyclopedia to introduce one correct installation of the bearings of five steps, I hope you are using bearings to help.
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Special tool for installing and removing bearing using bearing
Advanced installation tools to avoid the damage caused by improper tools and improper operation of the bearing. For example, when installing the bearing, staff has been used copper typing method, is easy to cause the bearing axial force, causing cage deformation, rolling body is impaired, clearance and copper in the process of percussion, copper powder fly into the bearing retainer, easy to create bearing fault.
Bearing inspection before installation
For old bearings, there is a need to check the surface of the ball (column) whether there are burr, scratches, cracks. Radial clearance, axial clearance, bearing the old are qualified, generally only measure the radial clearance. For new bearings, the first to check whether the correct bearing model. Standard reference for radial clearance of rolling bearings 1. For example: types of 6318 deep groove ball bearings, bearing inner diameter of 90mm, the radial clearance range for 0.016 ~ 0.046mm, also can be found in the maximum bearing wear is 0.25mm.
Check mating dimensions for bearings and rotor shafts
When the motor is assembled, the matching dimensions (Table 2) of the bearing and the rotor shaft must be carefully checked, and the matching dimensions of the outer ring of the bearing and the hole of the end cover are also required.
Control the quantity of oil in bearing and bearing.
Bearing box and the amount of oil too much, it will cause the bearing rolling body slip, cause rolling body by rolling friction sliding friction and damage the bearing rolling body, due to the excessive amount of oil bearing, bearing box free space small, bearing operating temperature will rise, grease Hector degree decreased, rolling body lubricating oil film thinning, the conditions of poor lubrication, easy to cause abnormal sound of the bearing, surface sliding, relationship bearing life. One sort of motor end cover side is provided with the bearing oil chamber (dual sealed bearing motor exception), according to the speed of the motor, bearing chamber can be carried out according to the following criteria: motor speed < 1500. The amount of fuel for the bearing chamber volume of 2 / 3 the amount of oil. Speed in the 1500 ~ 3000r/min between the bearing chamber volume of 1/2. Speed > 3000r/min, should be less than or equal to the bearing capacity of the 1/3. In the actual work process, for the high temperature and high speed operation of the bearings, should be as little as possible with the sealing surface of the bearing, increase the amount of oil covered with motor oil, and fitted with a gas nozzle, can improve the motor bearing service life.
Note that the insulation is in good condition
For the outer ring with insulation design bearings, need to pay attention to ensure that the insulation is in good condition. Installation if damaged bearing insulation, very thin oil film bearings will be shaft breakdown voltage, oil film breakdown, not only the rolling lubrication condition is bad, and the electric spark to the bearing rolling body to form the electrical erosion, caused on the surface of the rolling body not only, accelerate the bearing wear.