Transient-mixed lubrication model numerically for friction and wear of journal bearings under heavy load during start-up
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 27 September 2022
Issue publication date: 25 October 2022
Abstract
Purpose
Friction and wear are very important factors in predicting the performance of journal bearings, particularly under heavy load in start-up processes. However, there are few relevant studies on the numerical model. This study aims to establish a transient-mixed lubrication model to predict the performance of journal bearings, focusing on the friction and wear behavior under heavy load during start-up.
Design/methodology/approach
The average Reynold equation, three-dimensional energy equation, shear stress model for friction and Archard model for wear are coupled in the transient model by finite difference method. The linear wear simulation method is bought out to reduce the update times and the calculation time.
Findings
The different start-up accelerations and linear wear times set are compared and discussed, which indicates a reasonable start-up acceleration is necessary for journal bearings under heavy load during start-up, and setting linear wear times is an effective method to reduce the simulation time significantly. Furthermore, the wear profile in the start-up process spreads in both the clearance and circumferential directions, but mainly in the clearance direction, which increases the minimum film thickness and affects the friction performance.
Originality/value
This study is of great significance for the numerical prediction of the transient performance of journal bearings during start-up considering friction and wear.
Keywords
Acknowledgements
The work was sponsored by Natural Science Foundation of Shanghai, China (No: 22ZR1430600), and National Natural Science Foundation of China (No: 52130502).
Citation
Yan, K., Li, H., Ding, N., Jiang, D. and Meng, X. (2022), "Transient-mixed lubrication model numerically for friction and wear of journal bearings under heavy load during start-up", Industrial Lubrication and Tribology, Vol. 74 No. 10, pp. 1174-1185. https://doi.org/10.1108/ILT-05-2022-0166
Publisher
:Emerald Publishing Limited
Copyright © 2022, Emerald Publishing Limited