Characteristics of the rolling bearing normal operation and practical diagnostic skills

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We found that in the long-term production status monitoring, Rolling in its use during the show a strong regularity, and very good repeatability. Normal quality bearing to start using vibration and noise is relatively small, but some scatte red spectrum are small amplitude, may be due to due to some defect in the manufacturing process, such as surface burrs.
Movement after a period of vibration and noise to maintain a certain level, the spectrum is very simple, only the first, second multiplier. Very rare three times above the working frequency spectrum, bearing very stable, into a stable period.deep groove ball bearing
Continue to run into the use of post-bearing vibration and noise begins to increase, sometimes appeared tone, but the change of vibration increases more slowly, at this time, bearing the kurtosis values ​​suddenly reaches a certain value. We believe that the bearing that is, the initial failure.deep grove ball be aring
At this time, the bearing requires close monitoring, and pay close attention to the change. Thereafter, the bearing kurtosis values ​​began declining rapidly, and close to the normal vibration and noise significantly increased its growth significantly began to accelerate when the vibration exceeds the vibration standards (such as the ISO 2372 standard), bearing kurtosis value The rapid increase, when both exceed the vibration standards, and kurtosis values ​​above the normal (available kurtosis relative standard), we believe that the bearing has entered the late failure of production, the need for timely maintenance equipment, replacement of the rolling bearing.
Bearing performance characteristics of late failure to a serious failure (usually axle bearing damage such as burns, sand shelf spallation, raceway, bead wear) Time is no more than a week, the greater the capacity of equipment, the faster speed, the The shorter the interval. Therefo re, the actual ball bearing fault diagnosis, if it is found late failure characteristics, should be decisive to determine the bearing fault, as soon as possible overhaul.thin bearings