Effects of wall slip on the dynamic characteristics of water-lubricated bearing considering rough contact
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 11 August 2022
Issue publication date: 13 October 2022
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
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