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APPLICATION OF SYNCHRONOUS AVERAGING TO VIBRATION MONITORING OF ROLLING ELEMENT BEARINGS

✍ Scribed by P.D. MCFADDEN; M.M. TOOZHY

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
255 KB
Volume
14
Category
Article
ISSN
0888-3270

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✦ Synopsis

In this paper, the high frequency resonance technique, used for many years in the early detection of failure in rolling element bearings by vibration analysis, is combined with the technique of synchronous averaging, which has long been applied to vibration analysis of gears for the early detection of failure. It is shown that by synchronising the averaging of the envelope signal with a trigger signal taken from the rotation of the shaft, a representation is obtained for a bearing under radial load of the in#uence of the load distribution and the e!ects of the transfer path to the vibration transducer. By synchronising with the rotation speed of the shaft relative to the cage, an estimate is obtained of the distribution of the damage on the inner race of the bearing, and of the variations between rolling elements. The techniques are demonstrated by experiments on a laboratory test rig with a rolling bearing under radial load and multiple simulated spalls on the inner race.

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