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Fault Diagnosis and Failure Prediction by Thrust Load Analysis for a Turbocharger Thrust Bearing

[+] Author Affiliations
Jizhong Zhang, Hong He

National Lab. of Diesel Engine Turbocharging Tech., Datong, China

Harold Sun

Ford Motor Company, Dearborn, MI

Liangjun Hu

Beijing Institute of Technology, Beijing, China

Paper No. GT2010-22320, pp. 491-498; 8 pages
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 6: Structures and Dynamics, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4401-4 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME


The axial thrust load of a turbocharger is generated due to the pressure differential between the compressor and turbine. Changes in compressor and turbine geometry and variations in test conditions can influence the thrust load. Once the axial force exceeds the loading capacity limit of a thrust bearing, the balance of the thrust bearing system cannot be maintained, which may lead to a catastrophic failure of the turbocharger. In this paper, a fault diagnosis of a turbocharger that experienced a catastrophic failure during flow bench testing is analyzed. A detailed analysis of a turbocharger thrust load, based on empirical formulae and CFD verification, is presented. The thrust prediction at high rotation speed is helpful for further flow bench testing and to avoid the future turbocharger failure.

Copyright © 2010 by ASME



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