Detection of Incipient Damage in Large Rolling Element Bearings |
| Journal |
Advanced Materials Research (Volumes 13 - 14) |
| Volume |
Acoustic Emission Testing |
| Edited by |
R. Pullin, K.M. Holford, S.L. Evans and J.M. Dulieu-Barton |
| Pages |
37-44 |
| DOI |
10.4028/www.scientific.net/AMR.13-14.37 |
| Online since |
February, 2006 |
| Authors |
Leonard M. Rogers
|
| Keywords |
Bearings, False Brinelling, Fatigue, Fretting |
| Abstract |
The paper describes a methodology for the reliable detection of incipient damage due to
fatigue, fretting and false brinelling in large, heavily loaded rolling element bearings such as found
in pedestal slewing cranes and ship azi-pod propulsors. It has been found that combining acoustic
emission source location and spectrum analysis of the associated time-domain signatures has
produced a powerful diagnostic tool for the detection of micro-damage to the various working faces
of the bearing under variable speed and loading conditions, before any metal loss is evident in the
bearing lubricant. Other sources of acoustic emission such as fretting at contact faces elsewhere in
the body of the bearing and fluid turbulence can be resolved and quantified so as not to interfere
with the diagnosis of bearing condition. Results are presented for new and damaged bearings, where
the true condition has been verified when the bearings were subsequently replaced. |
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