FAG angular contact ball bearing assembly of common problems that should be paid attention to matters

Installed on the surface and a FAG bearings with iron filings, burr, dust and other foreign matter to enter, will make the bearing during the course of operation, noise and vibration that can damage raceway and rolling body. So, before the installation Angle contact ball bearing, you must ensure that the clean surface and installation conditions. Bearing temperature, ordinary can be based on speculation and the outside of the bearing temperature. But used oil hole directly measure the temperature of the bearing outer ring more accurate. Bearing temperature, from the beginning of operation gradually rise, usually 1 ~ 2 hours after the temperature stability. If bad FAG bearing device, the temperature will rise sharply, abnormal high temperature. For reasons such as too much smooth agent, angular contact ball bearing clearance is too small, sealing installation, friction is too large, and so on. Bearing the examination such as the rotation of the sound with a stethoscope, a strong metal noise, different sound and irregular clarify abnormal sound, etc. Its reason is smooth, shaft or precision bearing, angular contact ball bearing damage, foreign body intrusion, etc. 1, selection of shaft and the bearing chamber tolerance and control: FAG bearing pressure into the bearing chamber after rotation have obvious 'sasha vujacic' feeling with the hand, may be the shaft or shaft roundness tolerance is too big. After such as bearing pressure into the bearing chamber should be flexible rotation without blocking. If there are any obvious rotation is not flexible, indicates the size of the shaft is too big, tolerance to downgrade. 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. 2, assembly to prevent foreign body: bearing in loaded on the rotor dynamic balance when it is easy to dynamic balance of iron into the bearing inside, so it is best to install bearing before 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 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. 3, bearing assembly way: because the bearing is high precision products, such as improper assembly is easy diagonal channel contact ball bearing damage, result in bearing damage. When bearing 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 state level, such as with sloping channel by mechanical damage can lead to bearing, and make the FAG bearing guide ring. 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 manufacturers will think is a problem of 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, humidity, cover the contact ball bearing channel after corrosion result in FAG bearing damage. The problem now is only to choose good insulating paint, after drying and ventilation assembly after a period of time.