Tapered roller bearing fault feature to demonstrate advanced serious failure occurs (usually bearing damage such as axle, Burns, Sha spallation, Raceway, beads to wear) most of the time not exceeding one week, device capacity larger, faster speeds, shorter intervals. Therefore, practical in bearing fault diagnosis, once advanced fault characteristics, should be decisive judgment NSK bearings faulty, as soon as arrangements for inspection.
Causes noise rolling bearings are more complex, one is the inner and outer rings mating surfaces of the bearing wear. Because of this wear, damaged bearing shells, bearing and shaft fit, causes the axis deviates from the correct location, noise resulting from the axis in high-speed motion. When you NSK bearing fatigue, its surface metal flake, also tapered roller bearing radial clearance increases the noise. In addition, insufficient lubrication of the bearing, the formation of dry friction, as well as the crush of tapered roller bearings produces abnormal noises. After bearing wear loose, loose cage damage, would also have abnormal noise.
First of all, we want to stress is, keeping NSK bearings are lubricated and clean is very important. So before we examine bearings, you should clean the bearing surface, and then disassembling bearing parts around. We should pay attention to, is very fragile parts oil seal, and therefore require extra care in inspections and disassembly, not excessive force, so as not to cause damage to parts. Then carefully check the bearing oil seal and its surrounding parts, if you have rendered out when adverse symptoms, be sure to replace the bad oil seals will cause damage to the tapered roller bearing, tapered roller bearing cloud caused by the abnormal equipment downtime.
Secondly, we also have to check the bearing lubricant. Lubrication is very important, not only for bearings, bearings for all. Please note however, NSK bearings should not be adding too much grease.
Stained with lubricant on friction between the two means-dots, if the presence of pollutants, are feeling out; or coated with a thin layer of lubricant on the dorsum, and then make the rays.
Used oil lubricated bearings after purging old oil, if possible, should be poured into the fresh oil and let the machine at low speed of rotation for a few minutes. Oil collects residual contaminants as much as possible, and then purging these oils. Note: oil'd filtered before use. NSK bearings using grease lubrication when you replace the grease, used by Joe in addition to bearing should be avoid corners with cotton to any of the parts. Fiber because these residues may be between wedge on scroll and causing damage, especially small bearing application of more attention to this issue.
When the institutions, sites allow mounting of tapered roller bearings have a certain temperature, when hands touch the machine when the shell, should not feel hot to normal, instead it indicates that the bearing temperature is too high.
Bearing high temperature causes are: quality does not meet the requirements or deterioration of lubricant, lubricant viscosity is too high; body fitted too tight (insufficient gap); NSK bearing Assembly too tight; bearing washer on the shaft or in the shell rotation; load too large; cage of tapered roller bearings or rolling fragmentation, and so on.

 


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