Nonlinear dynamic analysis of water-lubricated textured journal bearings with cavitation effect
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 8 July 2024
Issue publication date: 17 January 2025
Abstract
Purpose
The purpose of this paper is to investigate the effects of different surface structures, dimensional parameters and cavitation models on the lubrication characteristics of water-lubricated journal bearings.
Design/methodology/approach
In this paper, the coupling iteration method of ANSYS and MATLAB is established to calculate the journal orbits of water-lubricated bearing, and the differences between the journal orbits of the smoothed and the textured water-lubricated bearings are compared and analyzed, and the effects of different bearing materials, L/D ratios and clearance ratios on the lubrication performance of water-lubricated bearings are investigated. The effects of different cavitation models on the static equilibrium position and whirling trajectory of water-lubricated bearings are compared.
Findings
The results show that when the surface texture is distributed in the upper bearing or the bearing elastic modulus decreases, the bearing stability increases. Considering shear cavitation and noncondensing gas, the rotor journal orbits amplitude decreases at high speed with low clearance ratio. A water film test rig for water-lubricated bearings is built to measure the full-circle water film pressure of water-lubricated journal bearings, and the experimental results are compared with the simulation results, which are in good agreement.
Originality/value
The findings provide a theoretical basis for optimizing the structure of water-lubricated bearings.
Keywords
Acknowledgements
This work was supported by the National Natural Science Foundation of China (No.52176050), the General Program of Natural Science Foundation of Shandong Province (ZR2020ME174).
Credit author statement: Conceptualization, Qiang Li and Xiuwei Li; methodology, Xiuwei Li and Xingyang Li; software, Xiuwei Li and Guokun Zhang; validation, Xiuwei Li and Yu Wang; writing—original draft preparation, Xiuwei Li and Qinglei Liu; writing – review and editing, Xiuwei Li and Qinglei Liu. All authors have read and agreed to the published version of the manuscript.
Declaration of interests statement: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Citation
Li, X., Li, X., Zhang, G., Wang, Y., Liu, Q. and Li, Q. (2025), "Nonlinear dynamic analysis of water-lubricated textured journal bearings with cavitation effect", Industrial Lubrication and Tribology, Vol. 77 No. 1, pp. 54-70. https://doi.org/10.1108/ILT-11-2023-0348
Publisher
:Emerald Publishing Limited
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