Thrust ball bearing fault features show serious fault (usually, such as bearing damage, burns, sand frame spallation, groove, wear bead, etc) little more than a week, equipment, and larger capacity, faster, the short time interval. Therefore, actual FAG bearing fault diagnosis, once discover fault, its advanced function, should resolutely determined the bearing fault, repair as soon as possible.
1, the shaft and bearing room tolerances of choices and control: bearing pressure into the thrust ball bearing should be flexible rotation after no block feeling. If there are obviously not flexible rotation, indicates that the size of the shaft is too big, tolerance to cut. Such as bearing pressure into the shaft with hand after turning have obvious "sasha vujacic" feeling, likely is the tolerance of shaft is too large or shaft roundness is bad. So in control the axis and bearing room also want to control the tolerance roundness, the home a lot of manufacturers to only tolerance control, no control to roundness.
2, the fitting way: for bearing is high precision products, such as assembly not easily on the channel bearing damage, leading to bearing damage. FAG bearing assembly should be in special mold, can't knock at will, in pressure into the shaft only small circle stress, pressure big lap can only big circle stress. When the assembly required by hydraulic pressure or, when pressed in lower die to outside the state level, such as with sloping can lead to thrust ball bearing the channel for stress damage, and make the bearing produces guide ring.
3, the assembly of foreign bodies from: bearing in fitted to the rotor dynamic balance on when it's very easy to dynamic balance is generated when iron into internal bearing, so it is best to put before bearing dynamic balance. There are some manufacturer to assembly is convenient, when bearing assembly in indoor apply some oil or grease lubrication effect, but often it is hard to operating personnel quantity control, if oil or grease in bearing indoor integrated leave more, in
FAG bearing drive along the axis is very easy to thrust ball bearings inside. Bearing room had better be not besmear oil or grease, if be not besmear is not to control shall not in bearing indoor have a product.
4, paint the rust prevention: paint the rust is happens in seal feature dense type of motor, motor in assembling a good voice, but in warehouses, put some time later, abnormal sound of great change motor, remove the bearing have serious rustiness phenomenon. Before a lot of manufacturers will think is bearing problems, through our continuous publicity, now motor have realized basically is the problem of insulation. The problems mainly because of the volatile acid out insulation in a certain temperature, humidity formed under the corrosive substances, the thrust ball bearings corrosion in gully in bearing damage. The problem at the moment is to choose good insulation, and after drying ventilation in a period of time after assembly.
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