Dynamic and tribological coupling analysis of journal bearing based on dynamic substructure

YANG Xin; GU Genxiang; SUN Sicong; ZHOU Jianming; LI Saili

doi:10.19693/j.issn.1673-3185.02265

Volume 16 Issue 6

Dec. 2021

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Article Navigation > Chinese Journal of Ship Research > 2021 > 16(6): 201-208, 215

YANG X, GU G X, SUN S C, et al. Dynamic and tribological coupling analysis of journal bearing based on dynamic substructure[J]. Chinese Journal of Ship Research, 2021, 16(6): 201–208, 215 doi: 10.19693/j.issn.1673-3185.02265

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Dynamic and tribological coupling analysis of journal bearing based on dynamic substructure

doi: 10.19693/j.issn.1673-3185.02265

1.
Shanghai Marine Diesel Engine Research Institute, Shanghai 200090
2.
School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China

Received Date: 2021-01-14
Rev Recd Date: 2021-02-24

Available Online: 2021-11-20

Publish Date: 2021-12-20

Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives This paper studies the dynamic and tribological characteristics of the main journal bearing, and the coupling relationship between them. Methods First, a dynamic model of the coupling tribological properties of a bearing wear test bed is established using the substructure method. The friction power consumption and orbital paths of the bearing are then calculated and compared with the measured results to verify the accuracy of the model. Finally, based on the model, the dynamic and tribological coupling analyses of the bearing are carried out. Results The results show that the four support bearings of the test bed are in a state of hydrodynamic lubrication, while the tested bearing is in a state of mixed lubrication at the top dead center. With the increase in radial clearance, the minimum oil film thickness of the tested bearing increases first and then decreases, and the most optimal lubrication state can be obtained when the tested bearing clearance is about 20 μm. Compared with the oil film model of a nonlinear spring, the elastohydrodynamic model can provide bearing load and friction power consumption results with higher accuracy. Conclusions The results of this study can provide theoretical guidance for the lubrication performance design and high-precision modeling of bearing pairs.
- journal bearing,
- dynamic property,
- substructure,
- tribology,
- coupling

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References

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