Oil free sliding bearing manufacturing popular to through forging, hot freedom, turning processing, grinding and assembly process.The rationality of the processing technology, advanced, stability will also affect the service life of bearing.Freedom and affecting the quality of bearing grinding process, often have a more direct relationship with bearing failure.Layer of bearings working surface transformation in recent years of the study indicate that is close to the grinding process and the surface quality of bearing.
Late failure character of sliding bearing bearing the severe fault (generally for bearing damage, such as holding shaft, burns, sand spallation, raceway, wear beads, etc.) most of time not more than a week, the equipment capacity is larger, the faster the speed, the shorter the time interval.In actual bearing fault diagnosis, therefore, once found late fault characteristics, should be decisive judgment composite bearing fault, arrange inspection as soon as possible.
Movement after a period of time, maintain a certain level of vibration and noise, frequency spectrum is very single, only one or two times the frequency.Rarely appear more than three times the power frequency spectrum, composite bearing condition is very stable, steady working period.Continue to run into the use of late, after bearing vibration and noise began to increase, sometimes a different sound, but the change of vibration increase is relatively slow, at this point, the bearing kurtosis value began suddenly reaches a certain value.We believe that the sliding bearing is characterized by the early fault of the bearing.
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