Abstract
Failure of a bearing in reduction gear box of a turbo shaft engine is investigated to determine its root cause. Teardown inspections followed by metallurgical investigations are carried out on the parts of the failed bearing. Severe flaking is observed on both inner and outer race as well as on balls. It indicates progressive fatigue due to overload. Insufficient clearance due to differential expansion of inner race and contraction of outer race due to heating and cooling, respectively, can also result in this type of phenomena. Maintaining oil discipline and using correct grade of oil at proper frequency can address these issues. A comprehensive engine-bearing prognostic approach may be followed utilizing available sensor information on-board the aircraft to predict bearing life and incipient bearing failure.
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References
K. Gurumoorthy, B.D. Faye, A. Ghosh, Handling abuse causes premature bearing failures. J. Case Stud. Eng. Fail. Anal. 1, 235–242 (2013)
I. Salam, A. Tauqir, A.U. Haq, A.Q. Khan, An air crash due to fatigue failure of a ball bearing. Eng. Fail. Anal. 5(4), 261–269 (1998)
J.L. Miller, D. Kitaljevich, In-line oil debris monitor for aircraft engine condition assessment, in Aerospace Conference Proceedings, vol. 6 (IEEE, 2000), pp. 49–56
P.J. Dempsey, N. Bolander, C. Haynes, A.M. Toms, Investigation of bearing fatigue damage life prediction using oil debris monitoring, NASA/TM—2011-217117, Nov 2011
A. Tauqir, I. Salam, A. Haq, A.Q. Khan, Causes of fatigue failure in the main bearing of an aero-engine. Eng. Fail. Anal. 7(2), 127–144 (2000)
R.K. Mishra, A.K. Mishra, G. Gouda, Causes and remedies of high jet pipe temperature in turbo shaft engines: case studies. J. Aerosp. Sci. Technol. 62(3), 203–208 (2010)
T.A. Harris, R.M. Barnsby, M.N. Kotzalas, A method to calculate frictional effects in oil-lubricated ball bearings. Tribol. Trans. 44(4), 704–708 (2001). https://doi.org/10.1080/10402000108982514
T.A. Harris, R.M. Barnsby, Tribological performance prediction of aircraft gas turbine mainshaft ball bearings. Tribol. Trans. 41(1), 60–68 (1998)
B.L. Averbach, E.N. Bamberger, Analysis of bearing incidents in aircraft gas turbine main shaft bearings. Tribol. Trans. 34(2), 241–247 (1991)
J. Halme, P. Anderson, Rolling contact fatigue and wear fundamentals for rolling bearing diagnostics—state of the art. Proc. IMechE Part J J. Eng. Tribol. 224, 377–393 (2009)
N. Ejaz, I. Salam, A. Tauqir, Failure analysis of an aero engine ball bearing. J. Fail. Anal. Prev. 6(6), 25–31 (2006)
M.J. Roemer, G.J. Kacprzynski, Advanced diagnostics and prognostics for gas turbine engine risk assessment, in 2000 IEEE Aerospace Conference Proceedings, vol. 6 (2000), pp. 345–353
R.K. Mishra, S.K. Muduli, K. Srinivasan, S.I. Ahmed, Failure analysis of an inter-shaft bearing of an aero gas turbine engine. J. Fail. Anal. Prev. 15(2), 205–210 (2015). https://doi.org/10.1007/s11668-015-9933-8
N.H. Forster, K. Thompson, A.M. Toms, S. Horning, Assessing the potential of a commercial oil debris sensor as a prognostic device for gas turbine engine bearings. AFRL presentation at IHSM conference, 11 Aug 2005
H. Mao, P. Yang, S. Gai, Aero-engine bearing condition evaluation and rule extraction. J. Comput. Inf. Syst. 8(18), 7433–7440 (2012)
W.K. Yu, T.A. Harris, A new stress-based fatigue life model for ball bearings. Tribol. Trans. 44(1), 11–18 (2001)
R. Orsagh et al., A comprehensive prognostics approach for predicting gas turbine engine bearing life, GT2004—53965, Proceedings of ASME Turbo Expo 2004, 14–17 June 2004
J. Mihalčová, State of aircraft turboshaft engines by means of tribotechnical diagnostic. Int. J. Turbo Jet-Engines 35(1), 11–16 (2018)
J. Zhao, Z. Liu, Y. Lu, J. Hu, Numerical modeling of unsteady oil film motion characteristics in bearing chambers. Int. J. Turbo Jet-Engines 32(3), 233–245 (2015)
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John, S.K., Mishra, R.K., Hari, K. et al. Investigation of Bearing Failure in a Turbo Shaft Engine. J Fail. Anal. and Preven. 20, 34–39 (2020). https://doi.org/10.1007/s11668-020-00812-1
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DOI: https://doi.org/10.1007/s11668-020-00812-1