FAG thrust ball bearing fault maintenance attention to matters

Thrust ball bearing fault characteristics show serious problem ( Normally, such as bearing damage, burns, sand spallation, raceway, wear beads, etc. ) Didn't surpass a week, the equipment, the capacity is bigger, faster and its distance from a relatively short time. Therefore, the practice of FAG bearing fault diagnosis, once found, its advanced function, should be resolutely affirms the bearing fault, repair as soon as possible. 1, selection of shaft and the bearing chamber tolerance and control: after the bearing pressure into the thrust ball bearing should turn the sensitive without blocking. If there are any apparent rotation not sensitive, indicates the size of the shaft is too big, tolerance to downgrade. Such as 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 to stop, only without the roundness stop control. 2, bearing assembly way: since the bearing is high precision products, such as improper assembly on bearing channel formation damage easily, cause damage of bearing. FAG bearing should have a special mould, when it is assembled cannot knock at random, only small circle of stress when pressure into the shaft, pressure can force the circle circle. Assembly request when using pneumatic or hydraulic, lower die when being connected to outside the state, if there is any oblique thrust ball bearing channel will incur due to mechanical damage, and make the bearing guide ring. 3, the assembly to avoid foreign bodies: bearing dynamic equilibrium in loaded on the rotor will easily generated when the dynamic equilibrium of internal iron into bearing, so it is best to install bearing before do dynamic balance. There are some manufacturers in order to assemble bento, assemble indoor apply some oil or grease in the bearing when the smooth effect, but often operators good amount of it is hard to control, if oil or grease in the bearing indoor storing up more, in FAG bearing rotates along axis to the thrust ball bearings 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. 4, paint, rust prevention: paint rust 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 bearing has serious rust phenomenon. Many manufacturer would think that is the problem of bearing before, after our propaganda from time to time, motor factory now has realized mainly is a question of insulating varnish. The problem is mainly due to the insulating paint volatilizes the acid under certain temperature and humidity of corrosive substances, the thrust ball bearing channel after the corrosion cause bearing damage. Asked the title can be to choose good insulating paint, before and after drying ventilation assembly after a period of time.