Lead to koyo one-way bearing overheating maintenance role - bearing knowledge

by:Waxing     2020-05-29
Koyo bearing show late fault feature to severe fault ( For bearing damage, such as holding shaft commonly, burns, sand spallation, raceway, wear beads, etc. ) Most of time not more than a week, the bigger the equipment capacity, the faster the speed, the shorter the time interval. Therefore, in the actual bearing fault diagnosis, once found late fault characteristics, should be decisive judgment one-way bearing fault, arrange inspection as soon as possible. Pop to koyo bearing manufacturing through forging, hot freedom, turning processing, grinding and assembly process. The rationality of the processing technology, advanced, stability will also affect the one-way bearing's life. 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. 1, koyo bearing damaged, should be replaced immediately. 2, bearing grease too little, too much or has the impurity such as iron filings. One-way bearing capacity of the grease should not exceed 70% of the total volume, have impurities should be replaced. 3, shaft and bearing fit too tight or too loose. Should be tight to grinding, must be set to a shaft with too loose. 4, bearing and end cover fit too tight or too loose. Too tight when processing the bearing chamber, too loose inside the end cover set steel bushing. 5 and motor end cover or bad bearing cover assembly. Will end cover or bearing cover check into mouth, flat, tighten the screws. 6, belt too tight or bad coupling assembly. Adjust the belt tension, coupling correction. 7, one-way bearing lubricating oil is too little, have impurities or oil ring stuck. Should such as refueling, change new oil, repair or replace the oil ring. 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, a one-way 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, koyo bearing kurtosis value began suddenly reaches a certain value. We believe that the bearing is characterized by the early failure. First obligation of koyo bearing using life is based on a large entourage of information, analyze the data and the failure pattern of postures, find a bearing failure of the primary elements, so that the improvement measures are put forward, and delay the retirement period of one-way bearing, avoid koyo bearing anger sudden early failure.
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