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Effects of wall slip on the dynamic characteristics of water-lubricated bearing considering rough contact

Juan Guo (College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, China)
Yanfeng Han (College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, China)
Shouan Chen (College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, China)
Jianlin Cai (College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, China)
Haiming Dai (School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 11 August 2022

Issue publication date: 13 October 2022

138

Abstract

Purpose

This paper aims to identify the role of the wall slip on the dynamic characteristics of the multi-groove water-lubricated bearing considering rough contact, including stiffness and damping coefficients of the water film and contact stiffness coefficient of the asperity contact.

Design/methodology/approach

The modified perturbed average Reynolds equations with the wall slip are derived, and the calculated perturbed hydrodynamic pressures are integrated to obtain the stiffness and damping coefficients of the water film. The elastic-plastic contact model of Kogut and Etsion is used to determine the contact stiffness coefficient.

Findings

Numerical results reveal that the wall slip has the more significant impact on the water film stiffness coefficients compared with the damping and contact stiffness coefficients. When the slip angle lies in a reasonable range, the lubrication performance can be effectively improved, especially in the mixed lubrication condition. In addition, it is worth emphasizing that the abrupt change of the water film stiffness coefficients occurs at the region II (pressure zone) in this study.

Originality/value

The influence mechanism of the wall slip on the dynamic characteristics of the water-lubricated bearing considering rough contact is first revealed.

Keywords

Acknowledgements

The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The present study is partially supported by National Natural Science Foundation of China (52105052,51975064), the General Projects of Basic Science and Frontier Technology Research of Chongqing (cstc2021jcyj-msxmX1069, cstc2021jcyj-msxmX1056).

Citation

Guo, J., Han, Y., Chen, S., Cai, J. and Dai, H. (2022), "Effects of wall slip on the dynamic characteristics of water-lubricated bearing considering rough contact", Industrial Lubrication and Tribology, Vol. 74 No. 9, pp. 1040-1048. https://doi.org/10.1108/ILT-03-2022-0086

Publisher

:

Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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