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Study on time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing under water lubrication

Haiming Dai (School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, China)
Guo Xiang (School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, China)
Jiaxu Wang (School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, China)
Juan Guo (School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, China)
Cheng Wang (School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, China)
Hang Jia (School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 9 February 2022

Issue publication date: 2 March 2022

169

Abstract

Purpose

The purpose of this study is to numerically investigate the time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing (MJTCB) under nonlinear excitation.

Design/methodology/approach

A three degree of freedom (3-DOF) dynamic model of the rotor coupling with the transient mixed lubrication behavior is established. Based on numerical predictions, the role of the microgroove on the time-varying mixed lubrication performance of MJTCB is identified. The effects of the microgroove depth, microgroove shape and external load on the time-varying mixed lubrication performance of MJTCB are also studied.

Findings

Numerical results show that the effect of the coupling hydrodynamic on the time-varying mixed lubrication performance of the coupled bearing is strengthen with the increasing of microgroove depth. Furthermore, it is found that the optimal microgroove shape for the thrust bearing, arc or rectangle, highly depends on the microgroove depth. Finally, the contact performance of the thrust bearing is slightly affected by the radial external load.

Originality/value

This study is expected to achieve a better understanding of the time-varying mixed lubrication performance of MJTCB under nonlinear excitations.

Keywords

Acknowledgements

The author(s) disclosed receipt of the following financial support for the research, authorship and/or publication of this article: 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

Dai, H., Xiang, G., Wang, J., Guo, J., Wang, C. and Jia, H. (2022), "Study on time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing under water lubrication", Industrial Lubrication and Tribology, Vol. 74 No. 2, pp. 265-273. https://doi.org/10.1108/ILT-11-2021-0448

Publisher

:

Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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