Motor bearing failure can lead to in the operation of the motor can't start, run abnormal noise, vibration, running slow, motor overheating or even burning. Various signs are: the motor bearing fault bearing body peeling or pitting, abnormal wear and bite stick, crack and fracture, cage damaged, inside and outside the ring and rolling body motion resistance increases or jammed.
⊿ the causes of the above are: quality is bad, grease to corrosive impurities, corrosion bearing body. Motor end cover or bearing cover installation does not reach the designated position, and bolt fastening, not bearing deflection malposition, brushless motor rotor will not operate properly, can't even turn. Bearing material itself.
bearing gland seal bad, bearing grease leakage is serious, bearing grease is insufficient in the state of operation. Bearing gland seal bad, dust and other foreign matter into the bearing body contaminating grease scleroma, running the bearing grease in bad condition. These will make the bearing in the operation of the overheating, cause of failure. Maintenance work to keep pace with, not regular inspection of motor bearing condition. Wear overrun bearing failed to timely replacement, failed to timely supplement of the lack of grease, grease does not change in a timely manner to clean the dirty.
⊿ motor bearing fault processing method of assembly time pay attention to the motor end cover and the bearing pressure equipment to be installed, otherwise will affect the bearing function. The end cover and bearing gland bolts to tighten up. Narrowing the diameter of axle wear loose, with trunnion bearing inner ring is the cause of motor shaft channeling move, can be used on the diameter of axle method such as chrome plating to repair. Bearing outer ring and bearing hole loose can use chrome plated or set of methods of repair. Make the bearings inside and outside the circle of their spouse to have a small amount of interference. , large amount of interference of assembly is difficult, not only may reduce swimming bearing clearance, cause in the operation of the heat damage to the bearings.
forced off brushless motor bearings, bearing grease inside take out, soaking with kerosene and gasoline for a period of time, will check after bearing clean, inside and outside the ring crack, roller and race surface spalling, crushing, pitting and rusty spot, with the hand toggle whether the inside and outside the circle turning light and flexible, can continue to use after confirmed no problem. One of the above problems and between inside and outside the circle is too loose, excessive wear, winding gap is too big, should be discarded, update the bearing. The new bearing with kerosene or gasoline antirust oil to clean clean, after meet quality requirements, change again.
forced the assembly time pay attention to the outside surface in bearing has a brand, for easy maintenance view, who cooperate with bearing outer ring of the parts can't contact with bearing inner ring. Mounted on the bearing inner ring parts, also can't touch the bearing outer ring, so as not to affect the bearing function.
when forced the bearing load by the hole, should increase pressure on the outer ring, tooling can only knock when the outer ring. On the diameter of axle when installation should increase pressure on the bearing inner ring, can only be banging on inner ring. Knock, copper bar or wood village of soft objects such as cushion, in turn, on the bearing ring circular symmetrical, also can use a special set of Jane beat bearing ring, bearing the uniform load. For larger bearings can be installed in the oil bath method.
forced the use of grease to quality requirements, fill in the bearing between the inner and outer ring cavity, but can't fill full: filling the cavity half secondary motor, second class above one-half to two-thirds of the motor of filling the cavity.
