Failure analysis of bearings in air conditioning compressor

Authors

  • Piyorose Promdirek Faculty of Engineering, King Mongkut’s University of Technology North Bangkok
  • Alfred Leidig Rosenheim University of Applied Sciences, Rosenheim
  • Thanis Keawjarus Siam Compressor Industry Co., Ltd.
  • Preecha Tong-in Siam Compressor Industry Co., Ltd.

Keywords:

Failure analysis, Bearing, Wear, Al-Sn alloy, Lubrication

Abstract

Two journal bearings of a compressor were failed in service. The wear which led to crack was observed at the internal surface of both bearings. The objective of this analysis is to evaluate the reason for the wear found on the internal bearings surface. Two bearings were returned from field and others in several conditions were examined. Electron probe micro analyzer and microhardness was used for metallurgical analysis. It revealed that bearing consisted of two different layers: 1) Fe-base and 2) Al-Sn alloy. Surface worn at the internal surface which composed of Al-Sn alloy was found. The results also showed that the phase transformation of the internal surface of the bearing in service was occurred as same as the bearing used without oil lubrication. The lack of oil lubrication is therefore the main reason for the wear found at the bearing in service.

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References

Williams, J. A. (1994). Engineering tribology. Oxford University Press.

Khonsari, M. M., and Booser, R. E. (2001). Applied tribology : bearing design and lubrication. New York : John Wiley & Sons.

Moore, F. D. (1975) . Principles And Applied of Tribology. New York : Pergamon Press.

Stuczynski ,T. (1997). Metallurgical problems associated with the production of aluminium - tin alloys. Mater. Des. 18(4-6) : 369–372.

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Published

2012-06-30

How to Cite

[1]
P. Promdirek, A. Leidig, T. Keawjarus, and P. Tong-in, “Failure analysis of bearings in air conditioning compressor”, J Met Mater Miner, vol. 22, no. 1, Jun. 2012.

Issue

Vol. 22 No. 1 (2012)

Section

Original Research Articles

License

Copyright (c) 2012 Journal of Metals, Materials and Minerals

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