Angular contact ball bearing installation works after adjustment method

Timken bearing showed a strong regularity in the process of its use, and the repeatability is very good. Normal quality angular contact ball bearings, at the beginning of the use of vibration and noise are relatively small, but there are some scattered of spectrum amplitude is small, may be due to some defects in the process of manufacturing, such as surface caused by burrs, etc. 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, timken 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 angular contact ball bearing kurtosis value began suddenly reaches a certain value. We believe that the bearing is characterized by the early failure. At this time, requires that the bearing is closely monitoring, pay close attention to the change. Since then, bearing kurtosis value began falling fast, and is close to normal, and significant increase in vibration and noise, it began to accelerate the increase, when the vibration more than standard ( Such as ISO2372 standard) , its bearing kurtosis value also began to increase rapidly, when more than vibration standard, and kurtosis value is more than normal ( Available kurtosis relative standard) When we think of timken bearing fault, has entered the late should be timely maintenance equipment, replace the bearing. Late show bearing 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 is bearing fault, arrange inspection as soon as possible. 1, low noise, angular contact ball bearing installation and adjustment also can imitate grouping method of long life bearings, makes the interference fit the size is consistent, bearing clearance is relatively consistent, and hope to cooperate with interference within may take smaller values, to ensure the deformation of bearing raceway is small, and rolling body caused by noise is smaller. 2, clearance on the relationship between the noise is very large, ideally when imported bearing in running state, the highest temperature clearance value is zero. Judgment methods of clearance is too large, stationary state made shaft axial displacement, the extent of the reciprocating is bigger, the big and heavy turbidity of a noise during operation. 3, if you send hate sharp whistlers when running, is the angular contact ball bearing preload is too big, preloaded, timken bearings have a large prestressing degree should have to relax. If the clearance is too large, can make the two bearing ring along the axial relative offset slightly: both reduced clearance, and increase the axial rigidity, bearing noise can be reduced. 4, rolling body around would not bite into the no-load area or channeling, that will not only increase the noise can also cause wear and tear, and the small clearance and large axial stiffness can eliminate the phenomenon. But cannot too small clearance, lest cause high temperature and shorten the life. 5, sometimes due to host large working temperature range, or shaft with a hole the size of the discreteness is very big, can't get a setting on a proper clearance, in this case, can be diagonal contact ball bearing outer ring of the elastic constant pressure preload method.