Result in higher INA flange bearing temperature check

The cause of the bearing temperature rise mainly include: the first: lubricating oil quality is bad? If the lubricating oil viscosity can also lead to INA bearing temperature rise; Second: bearing the assemble if too tight, inadequate clearance can also lead to the flange bearing temperature rise; Third: bearing assembly too tight will also lead to bearing temperature rise; Fourth: bearing race in internal rotation shaft or housing can also lead to bearing temperature rise; Fifth: bearing heavy load can cause bearing temperature rise; Sixth: if bearing cage or broken roller, can also lead to bearing temperature rise. After bearing pressure into the INA bearing should be flexible rotation without block. If there are any obvious rotation is not flexible, indicates the size of the shaft is too big, tolerance to downgrade. Such as imported bearing pressure into the shaft by hand after the rotation has obvious 'sasha vujacic' feeling, may be the shaft or shaft roundness tolerance is too big. When control the shaft and the bearing chamber tolerance so also want to control the roundness, at present many domestic manufacturers to control the tolerance, not to control the roundness. Because the flange bearing is high precision products, such as improper assembly is easy to cause damage to bearing channel, result in bearing damage. INA bearing in the assembly shall have a dedicated mold, not casually, only small circle of stress when pressure into the shaft, pressure can force the circle circle. Require the use of pneumatic or hydraulic assembly, lower die when being connected to outside the level state, if there are any tilt can lead to bearing channel due to mechanical damage, and make the bearing guide ring. Bearing in loaded on the rotor dynamic balance when it is easy to will be generated when the dynamic balance of iron into internal INA bearing, so it is best to install before import bearings do dynamic balance. There are some manufacturers in order to convenient assembly, assembly in bearing indoor coated with some oil or grease lubrication effect, but usually operators good amount of it is hard to control, if oil or grease in the bearing interior storing up more, in the bearing rotates along axis to the flange bearing inside easily. Bearing chamber it is best not to apply oil or grease, if must apply to control shall not be storing up in bearing interior. Rust paint is characterized by multiple in sealing type motor, the motor sound is very good, when it is assembled but put some time in the warehouse, the motor sound is very big, remove the INA bearings have serious rust phenomenon. Many manufacturers will think that is a question of the flange bearing before, after our propaganda, motor factory now have realized mainly is a question of insulating varnish. Acid varnish comes out of the problem is mainly due to the formation of corrosive substances under certain temperature and humidity, the bearing channel after corrosion result in bearing damage. The problem now is only to choose good insulating paint, after drying and ventilation assembly after a period of time.