Motor bearing corrosion accident characteristics

Production process, production environment, through the motor of insulating paint, grease, adopted by the assembly process, packaging, warehousing and related electrical accessories and bearing factory production and sales of understanding and field investigation, found that corrosion accident has the following characteristics: 1) Mainly in ventilation fans, cooling fan motor and other household appliances and office machinery, most of these machinery used by motor power in watts to hundreds of watts, and basically is full enclosed small motor. 2) Finished product test run when no abnormalities are found after a single motor assembly packaging, in the care of a few months later, use increase noise phenomenon happens. After took the machine apart, found that the noise is bearing corrosion caused by generated inside it. 3) Rusting of motor bearing is in the process of manufacturing or in the warehouse during the period of storage, just is a bigger in higher temperature and humidity. 4) Customize the bearing generally from bearing factory direct purchase, buy back the bearing factory bearing antirust processing, injection by grease, installed on the motor rotor. Bearing is usually in the lithium base grease oil adding additive, using solvent paint rust accident prone raw lacquer. 5) Bearing internal sometimes than external corrosion is serious, the types and relative humidity, rust and grease ester oil grease in the humidity ( 70%RH） Parts easy to rust, coating of grease; If it is caused by moisture rust, without coating the bearing outer surface of the grease is easy to rust. 6) Grease with special paint smell, because grease metamorphism occurred. 7) Bearing corrosion has obvious directivity, facing the rusting of the motor rotor bearing on one side of the side more, inside the bearing, close to the rotor side of the rusting of the raceway surface and cage.