How To Judge Whether The Bearing Can Be Used Again
How To Judge Whether The Bearing Can Be Used Again
2021年12月21日
It Is Very Important To Add More Or Less Bearing Grease
It Is Very Important To Add More Or Less Bearing Grease
2021年12月21日

Have You Systematically Understood The Inspection, Installation And Cleaning Methods Of Motor Bearings In The Motor Industry?

Inspection and installation method of motor bearing

1. Before checking the bearing, first take out the old lubricating oil of the inner and outer small covers of the bearing, then clean the inner and outer small covers of the bearing with brush gasoline, and clean the bristles or cotton threads after cleaning, so as not to leave them in the bearing.

2. Carefully check the cleaned bearing. The bearing shall be clean and intact without overheating, cracks, peeling, groove impurities, etc. the inner and outer raceways shall be smooth and the clearance at all places shall be qualified. If the support frame is loose and causes friction between the support frame and the bearing sleeve, the bearing shall be replaced.

3. The bearing after maintenance shall rotate flexibly without jamming.

4. Check whether the inner and outer small covers of the bearing are worn. If there is wear, find out the cause and deal with it.

5. The fit between fag bearing and shaft shall be fastened, otherwise it shall be treated.

6. When assembling a new bearing, the bearing shall be heated by oil heating or eddy current method. The heating temperature shall be 90 ~ 100 ℃. The bearing shall be sleeved on the motor shaft at high temperature and ensure that the bearing is assembled in place. It is strictly prohibited to drive the bearing up in cold state to avoid damaging the bearing.

Have You Systematically Understood The Inspection, Installation And Cleaning Methods Of Motor Bearings In The Motor Industry?

Generally, the motor bearing shall be cleaned and oiled after 2000 hours of use. There are two methods for cleaning the motor bearing:

1、 Hot oil cleaning method

It is mainly used for the motor bearing hardened by soft dry oil or anti rust paste. It shall be immersed in the hot engine oil at 100-200 ℃, clamp the motor bearing with pliers, and clean the oil stain on the motor bearing with a brush. The soft dry oil or antirust paste will melt when heated to 100-200 ℃, which is easy to wash out from the gap of motor bearing. Sometimes as long as the motor bearing is shaken in the oil for many times, the oil will flow away from the gap.

When cleaning the centripetal spherical motor bearing of the motor, the ball, bead holder and inner ring shall be turned laterally from the outer ring and then immersed in hot oil. When cleaning the bearing of short cylindrical roller motor, the roller, bead holder, inner ring and outer ring shall also be separated.

During hot oil cleaning, the INA Bearing Temperature of the oil shall not exceed 200 ℃. When heating directly with open fire, attention shall be paid to prevent the oil from burning. The motor bearing shall be hung in the oil pan and sink to the bottom, which will cause overheating and reduce the hardness.

2、 General cleaning method

Soak the motor bearing in kerosene for 5-10 minutes, hold the inner ring with one hand and rotate the outer ring with the other hand, and the dry oil or antirust paste on the motor bearing will fall off. Then put the motor bearing into clean kerosene, brush it with a soft brush, clean the oil stain in the ball and gap, then put it into gasoline for cleaning once, take it out and put it on clean paper. When cleaning the bearings of centripetal spherical ball motor and short cylindrical roller motor, the ball, ball rack, inner ring and outer ring shall be separated for cleaning.

The cleaning of motor bearings installed on the shaft mainly depends on oil spraying or oil gun spraying. The oil stains that are easy to be cleaned shall be kerosene first and then gasoline; For oil stains that are difficult to be cleaned, first wash them with 100-200 ℃ hot engine oil or spray them with an oil gun, and then clean them with gasoline. Be sure not to use sharp tools to scrape the hard oil dirt or rust on the motor bearing, so as not to damage the smoothness of the rolling element and groove ring of the motor bearing. The cleaned motor bearing shall be wiped dry with a clean cloth.