KOYO bearing assembly improper cooperate clearance with knowledge of fault detection - bearing

KOYO bearing as the main components of the locomotive, especially the traction motor and axle box KOYO bearing, its function plays an important role in transportation safety, the locomotive runs, online once KOYO bearing failure, will cause the whole trains can not run, blocking transportation trunk line, especially the passenger train fails, the negative impact is bigger, once the locomotive KOYO bearing failure occurs at the same time, the locomotive repair is very difficult, so the prevention and decrease of locomotive KOYO bearing failure, transportation is very important to the security of locomotive, can will have the problems before the KOYO bearing loading KOYO bearing. KOYO bearing damage is often not a single reason, but under the effect of several aspects comprehensive, under harsh operating conditions to produce vicious circle, causes severe loss of KOYO bearing, so after the accident, it is often difficult to determine is caused by what, also bring some difficulties to our relevant measures, convenient for discussion, first from several aspects to analyze the cause of KOYO bearing failure. Use after a period of time when KOYO bearing, KOYO bearing inner ring, rolling element and cage, outer ring raceway produce certain defects, such as scars, KOYO bearing caused by poor lubrication, cause the fever of KOYO bearing, fever for a long period of time, can lead to: ( 1) KOYO bearing lubricating oil dilution. ( 2) Accelerate the fatigue of material, hardness drops. Due to these reasons, and further form vicious circle, accelerated overheating and make the KOYO bearing damage. Serious displacement of KOYO bearing inner ring, rolling body round, heating, welding together in the end. So in the online operation, such as found KOYO bearing severe fever, smoke, don't stop, and should keep running to stand ahead, because this moment overheating KOYO bearing in melting state, once the parking is unable to walk again after cooling, main blockage. For oil for maintenance of locomotive KOYO bearing is very important, especially to KOYO bearing KOYO bearing the amount of gas can guarantee good lubrication, too much of the lack of oil and gas, are easy to cause KOYO bearing failure, and less likely to cause KOYO bearing lubrication and had fever, plus much more likely to cause a stir also overheat, so in the maintenance of oil to appropriate, at the same time, KOYO bearing lubrication oil clean is also very important, once the fall into the other impurities in the oil and water, will affect the normal clearance and building must be the oil film. KOYO bearing use time is too long, more than KOYO bearing service life and easy to lead to material fatigue, coupled with strong impact and make the material deformation, stripping, caused the roller and raceway surface grinding, resulting in poor lubrication and vibration. KOYO bearing inner ring do not tally with the axis of the interference fit clearance, it is easy to cause KOYO bearing failure, large amount of interference, it is easy to cause KOYO bearing inner ring cleft, due to excessive tensile stress interference quantity is too small, it is easy to cause KOYO bearing inner ring 'relaxation'. KOYO bearing assembly cooperate clearance with undeserved, also easy to cause KOYO bearing failure, small clearance is easy to cause the roller and raceway friction heat, with the rising of temperature, KOYO bearing inner ring, rolling element and cage, outer ring, the temperature of the end cover is not the same, there is a temperature difference between each other, thus expanding quantity is slightly different, also can make further reduce the tolerance clearance, according to KOYO bearing heating. Clearance is too large, the vibration of the roller, roller and race, but also easy to cause the internal load distribution, load bearing roller, the roller load is too large. KOYO bearing assembly is not according to the technological requirements, use copper hammer impact KOYO bearing, cage deformation, caused by traction motor KOYO bearing inner and outer ring installation is not correct or other reasons and make the axial transverse momentum vanished, KOYO bearing shaft crushed to death.