To determine whether a bearing can use standard again - bearing knowledge

Preventive maintenance of equipment, operation and peripheral parts replaced was removed when bearing inspection, judge can use or using again as a condition of good from bad. Carefully investigate and record the bearing and the appearance of being removed, in order to explore the residual amount of investigation and lubricant, after sampling, to clean the bearing well. 'Second check the raceway surface, rolling surface and cooperate with the surface condition and wear conditions of cage without damage and anomalies. Judge bearing can use again, to the extent of the damage in considering bearing, machine performance, importance, and operation conditions, such as inspection period to decide later. Test results, if found damage and abnormal situations, bearing injury section for find out the reason, make the countermeasure. In addition, the test results, there are some defects, if the bearing can't use, need to replace new bearing. 一个。 Inner and outer ring, rolling body, to keep any of them are cracks and debris. b。 Inner and outer ring, rolling body any one strip. c。 Raceway surface, guard, significant injury of roller. d。 Maintains a badly worn or loose rivet badly. e. Raceway surface, rust and roller has a scar. f。 Had a remarkable indentation rolling surface, rolling body and make a mark. g。 Inner ring diameter or outer diameter on the creep. h。 Discoloration of overheating. 我。 Sealed bearing grease sealing and dust cover breakage to serious. Inspected and fault handling operation of the project in operation has a bearing rolling noise, vibration, temperature, lubrication condition and so on, details are as follows: a, the rolling bearing noise sound device for rolling sound of bearing in operation and quality inspection, the size of the bearing even with slight stripping damage, such as would an exception and irregular, and with the sound of the measuring device can distinguish. Two bearing vibration, the vibration of the bearing is sensitive to bearing damage, such as peeling, indentation, rust, crack and wear will be reflected in the bearing vibration measurement, therefore, through the use of special bearing vibration tester ( Frequency analyzer, etc. ) Can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. Measured values of bearing or sensor installation position and different using conditions, thus requiring prior to each machine is analyzed by the measured value of the determined after judgment standard. Three, the temperature of the bearing temperature of bearing, generally have a bearing on the surface of the outdoor temperature can be predicted, if using the oil hole can directly measure temperature of bearing outer ring, is more appropriate. Usually, the temperature of the bearing with operation began to slowly rise, 1 - After 2 hours to reach steady state. The normal temperature of bearing for machine heat capacity, heat dissipating capacity, rotational speed and load. If the appropriate lubrication, installation department, the bearing temperature will rise sharply, appear unusually high temperature, must stop at this moment, take the necessary precautions. Using thermal device can monitor the bearing temperature at any time, and realize e. automatic alarm when the temperature is more than the household or stop to prevent the shaft accidents.