Bearing running noise and overheat preventive measures

Bearing running noise and overheat preventive measures when the worse performance of bearing grease under radial load cases, early operation will hear 'kacha, kacha' noise, this is mainly due to the rolling element load area after you leave, rolling body acceleration and collided with cage and noise, the sound is inevitable but as operation after a period of time will disappear. Measures to prevent cage noise is as follows: a. To make maintains a stable orbit, bearing should be used as far as possible ring guide way and note to guide the sufficient lubrication, the tapered roller bearing structure of the high speed working conditions to improve, keeping the L shape of roller guide frame to ring guard guide Z type cage. b。 Bearing high speed rotates, pocket large clearance of bearing bracket will be its vibration amplitude is greater than small cage pocket hole clearance vibration amplitude, so the pocket hole clearance values are particularly important. c。 Attention should be paid to minimize radial clearance. d。 Try to improve the retention value manufacturing precision, surface quality of the cage, is beneficial to reduce the rolling element and cage collision or friction noise. e. Actively adopt advanced cleaning technology for spare parts and products of thorough cleaning, effectively improve the cleanliness of bearing. 1, selection of shaft and the bearing chamber tolerance and control: after the bearing pressure 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 taper roller 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. 2, bearing assembly way: because the bearing is high precision products, such as improper assembly is easy to cause damage to taper roller bearing channel, 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, 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. 3, the assembly to prevent foreign body: tapered roller 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. 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 taper roller bearing with 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 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.