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Advanced condition monitoring of tapered roller bearings, part1

Advanced condition monitoring of tapered roller bearings, part1
Advanced condition monitoring of tapered roller bearings, part1
A new condition monitoring technique is under development which is based
on electrostatic charge. This was originally employed for the detection of debris in the
gas path of jet engines and gas turbines, and is now being developed for lubricated
systems. Previous investigations have demonstrated the viability of this technique in
dry and lubricated tribo-contacts using laboratory-based equipment. This paper
reports on the evolution of wear during a tapered roller bearing test, using a suite of
condition monitoring techniques, that incorporated electrostatic wear-site sensors to
identify charge during surface wear and oil-line sensors to detect debris in oil
scavenge lines. The multi-sensor arrangement also included a vibration accelerometer,
thermocouples, inductive and ferromagnetic particle counters. Additionally, oil
samples were taken during various stages of the test and were analysed for sub-100
?m debris content. Off-line debris analysis included optical particle counting,
ferrography, spectrometric oil analysis and electron microscopy. Further tribological
assessments included mass loss calculations and photographic evidence of damage.
During the initial 7 hours, running-in wear was identified by dynamic wear site
charge, acceleration and temperature. Also at this time, increases in oil-line charge
correlated with debris detection by the inductive sensor, optical particle counter and
ferrographic analysis. Following running in, benign wear was indicated by a reduction
in wear site charge, acceleration and temperature, as well as reductions in oil-line
charge, inductive and optical particle counts. Around 42 hours, increases in inductive
and optical particle count were considered to be an early indicator (or precursor) of
the impending wear out phase. At 53.5 hours, wear out was identified by increases in
wear site charge, acceleration and temperature. Evidence of wear debris was shown
by increases in oil-line charge, inductive and ferromagnetic particle count. The debris
was further corroborated by optical particle count, ferrography and spectrometry. The
test was then stopped after 63 hours and post-test analysis confirmed outer race and
roller spallation.
rolling element, debris, spalling
0301-679X
1846-1856
Craig, M.
7f1dfda7-c7ea-4cdb-9010-e103cbe2af42
Harvey, T. J.
3b94322b-18da-4de8-b1af-56d202677e04
Wood, R. J. K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Masuda, K.
4b1db4ef-4616-4bf0-a2f1-6ee9584fd277
Kawabata, M.
ca75990e-97ef-4362-8d3d-598830014f33
Powrie, H. E. G.
def327b4-4841-4394-a166-995fb6c126a6
Craig, M.
7f1dfda7-c7ea-4cdb-9010-e103cbe2af42
Harvey, T. J.
3b94322b-18da-4de8-b1af-56d202677e04
Wood, R. J. K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Masuda, K.
4b1db4ef-4616-4bf0-a2f1-6ee9584fd277
Kawabata, M.
ca75990e-97ef-4362-8d3d-598830014f33
Powrie, H. E. G.
def327b4-4841-4394-a166-995fb6c126a6

Craig, M., Harvey, T. J., Wood, R. J. K., Masuda, K., Kawabata, M. and Powrie, H. E. G. (2009) Advanced condition monitoring of tapered roller bearings, part1. Tribology International, 42 (11-12), 1846-1856. (doi:10.1016/j.triboint.2009.04.033).

Record type: Article

Abstract

A new condition monitoring technique is under development which is based
on electrostatic charge. This was originally employed for the detection of debris in the
gas path of jet engines and gas turbines, and is now being developed for lubricated
systems. Previous investigations have demonstrated the viability of this technique in
dry and lubricated tribo-contacts using laboratory-based equipment. This paper
reports on the evolution of wear during a tapered roller bearing test, using a suite of
condition monitoring techniques, that incorporated electrostatic wear-site sensors to
identify charge during surface wear and oil-line sensors to detect debris in oil
scavenge lines. The multi-sensor arrangement also included a vibration accelerometer,
thermocouples, inductive and ferromagnetic particle counters. Additionally, oil
samples were taken during various stages of the test and were analysed for sub-100
?m debris content. Off-line debris analysis included optical particle counting,
ferrography, spectrometric oil analysis and electron microscopy. Further tribological
assessments included mass loss calculations and photographic evidence of damage.
During the initial 7 hours, running-in wear was identified by dynamic wear site
charge, acceleration and temperature. Also at this time, increases in oil-line charge
correlated with debris detection by the inductive sensor, optical particle counter and
ferrographic analysis. Following running in, benign wear was indicated by a reduction
in wear site charge, acceleration and temperature, as well as reductions in oil-line
charge, inductive and optical particle counts. Around 42 hours, increases in inductive
and optical particle count were considered to be an early indicator (or precursor) of
the impending wear out phase. At 53.5 hours, wear out was identified by increases in
wear site charge, acceleration and temperature. Evidence of wear debris was shown
by increases in oil-line charge, inductive and ferromagnetic particle count. The debris
was further corroborated by optical particle count, ferrography and spectrometry. The
test was then stopped after 63 hours and post-test analysis confirmed outer race and
roller spallation.

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More information

Published date: December 2009
Keywords: rolling element, debris, spalling
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 149599
URI: https://eprints.soton.ac.uk/id/eprint/149599
ISSN: 0301-679X
PURE UUID: 7aa869a9-69bf-4ad3-8be4-205561920743
ORCID for R. J. K. Wood: ORCID iD orcid.org/0000-0003-0681-9239

Catalogue record

Date deposited: 30 Apr 2010 13:57
Last modified: 06 Jun 2018 13:06

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