Motor bearing damage reason and the characteristic

On the generator of deep groove ball bearing type is more, bearing recycling companies take a look at your motor bearing: (because of the destruction and characteristics 1) Mechanical equipment damage rolling bearing mechanical equipment damage is refers to the aluminum alloy surface of piston pin appear different levels of the trench, serious when on the touching surface metal materials from and its massive sprawl scratch; Usually, surface damage other entities to the state of crevice corrosion. In the key of the rolling bearing mechanical equipment damage reason is rolling bearing surface can't produce oil or oil was damaged. ( 2) Cavitation rolling bearings rolling bearing in the cylinder pressure impact load) Under the constant effect of surface plastic deformation and strain hardening of the missing part deformation work ability, gradually improve grain and continue to expand, then, with the fall of wear debris, holes on the bearing surface. Piston pin usually produce cavitation, dent is come first, then gradually expand this kind of dent and split caused by aluminum alloy layer of the page, the parallel surface crack down the page orientation, until it falls off. Rolling bearing the key reason of this is because the oil tank and the inlet section of the structure factors, suddenly change the oil flow apparent confusion, chaos of the vacuum pump in oil flow area produces bubbles, and then rising because of work pressure, steam bubble breaking and cause cavitation. Cavitation is usually produced in high load of rolling bearings, such as the main engine crankshaft rolling bearing on the piston pin. ( 3) Rolling bearing fatigue crack corrosion fatigue crack corrosion is refers to, because diesel engine overload work, the work of rolling bearing Chinese super temperature and rolling bearing gap is too big, lead to central and southern rolling bearing crevice corrosion fatigue damage, tired, or tired. Most of this kind of damage as a result of being overweight, rolling bearing gap is too large, or not clear, and stained with grease dirt. Thus, the application shall pay attention to prevent rolling bearing overweight need not to work too low or too high speed than running; To speed diesel engine to adjust to the stable situation; Ensure all normal rolling bearing gap, to avoid car speed too high or too low; Inspection, adjust the work condition of the refrigeration system, to ensure that the diesel engine operating temperature. ( 4) Bearing metal etching bearing metal etching is usually for bad grease, grease, organic chemical residue ( Acidic oxides, etc. ) Make the bearing alloy air oxidation and converted into acid and alkaline chemicals, cause bearing alloy part fell off, produce irregular small hole crack or small dents. Bearing metal etching the key reason is poor, rolling bearing grease raw material corrosion resistance is poor, or rude, temperature in a diesel engine work of institutions of higher learning. ( 5) Rolling bearing burning-out motor shaft and the rolling bearing friction pair have subtle swelled face immediately touch metal materials, high temperature part, in the face of poor RunHua enough, water cooling conditions, make bearing alloy black or part of a burning fuse. The common failures often to motor shaft too tight caused in conjunction with rolling bearing; Grease work pressure is also very easy to make the rolling bearing damaged enough. ( 6) Rolling bearing inner hole rolling bearing walk inner hole is rolling bearing hole with relative rotation here. After go rolling bearing inner hole, not only harm rolling bearing heat pipe cooling, very easy to make the rolling bearing inner surface crevice corrosion of aluminum alloy, and it also can make the reverse rolling bearing damage, serious damage of rolling bearing. The key reason is that the rolling bearings are too short, tenon damage, production and processing, or assembly is not in conformity with the requirements, etc.