Prolonging the service life of the thrust ball bearing method

Thrust ball bearing of life with revolution ( Or in the hours of work under a certain speed) , definition: within the life of TIMKEN bearings, should be in any of its bearing ring or rolling on initial fatigue damage ( Flake or defect) 。 Whatever the test in the laboratory or in actual use, can be clearly seen, under the same working conditions, the appearance of the same bearing the actual life. In addition there are several different definitions of bearing 'life', one of which is known as the 'service life', it represents a certain bearing before damage to the actual life is by the wear and tear, damage usually is not caused by fatigue, but due to abrasion, corrosion, damage to the seal, and so on. Most of the bearing smoke bad for many reasons - — Than previously estimated load, the effective sealing, tight fit too small, as a result of bearing clearance, etc. Any of these factors factors there is its special damage forms and will leave a special signs of deterioration. Examine the damage to the thrust ball bearing, therefore, in most cases can find its possible causes, generally speaking, a third of the bearing damage resulting from the fatigue damage, a third of the other resulting from poor lubrication, a third of the other resulting from pollutants into the TIMKEN bearing improper handling or installation. Shaft and the bearing chamber tolerance selection and control: after the bearing pressure into the bearing 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. Such as thrust ball 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. Bearing assembly way: because the bearing is high precision products, such as improper assembly is easy to cause damage to bearing channel, result in TIMKEN 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, touched up and down when pressed to outside the state level, such as with sloping channel by mechanical damage can lead to bearing, guide ring and the bearing. Assembly to prevent foreign body: thrust ball 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 TIMKEN 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. Paint the 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, the thrust ball bearing channel after corrosion result in TIMKEN bearing damage. The problem now is only to choose good insulating paint, after drying and ventilation assembly after a period of time.