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Experimental comparison of CuAl10Fe3 journal bearings sliding against two different coatings

Xinbo Wang (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China and State Key Laboratory of Mechanical Systems and Vibration, Shanghai, China)
Zhongwei Yin (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China and State Key Laboratory of Mechanical Systems and Vibration, Shanghai, China)
Hulin Li (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China)
Gengyuan Gao (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China)
Jun Cao (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 20 June 2019

Issue publication date: 12 September 2019

153

Abstract

Purpose

The purpose of this paper is to study the frictional behaviors of CuAl10Fe3 journal bearings sliding against chromium electroplated 42CrMo shafts and diamond-like carbon-coated 42CrMo shafts, respectively, under two different conditions and to compare the two kinds of friction pairs.

Design/methodology/approach

All journal bearing samples underwent 24 h running-in and repeatability verification. Then, the journal bearing friction experiments were carried out under two different conditions. After testing, the torques, friction coefficients, power consumptions and other parameters were obtained.

Findings

The pair of CuAl10Fe3 journal bearing and diamond-like carbon–coated shaft could drive greater load to start up than the pair of CuAl10Fe3 journal bearing and chromium electroplated 42CrMo shaft, but it had greater power consumption during the steady running period under the identical condition. With the changing of specific pressure or rotational speed, the friction coefficients had different variations. The frictional oscillations appeared at 32 rotations per minute under heavy loads for both kinds of pairs, the oscillation frequencies were equal to rotational frequency of the test shaft and the oscillation amplitude for diamond-like carbon coating was much greater.

Originality/value

These results have guiding significance for practical industrial applications.

Keywords

Acknowledgements

This research was supported by China Postdoctoral Science Foundation of 2017M611555, and Marine Low Speed Engine Project of CDGC01-KT11.

Citation

Wang, X., Yin, Z., Li, H., Gao, G. and Cao, J. (2019), "Experimental comparison of CuAl10Fe3 journal bearings sliding against two different coatings", Industrial Lubrication and Tribology, Vol. 71 No. 7, pp. 956-964. https://doi.org/10.1108/ILT-05-2018-0198

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited

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