Thermal characteristics and distribution rule of lubrication film of full ceramic ball bearing under different service condition
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 29 August 2023
Issue publication date: 31 October 2023
Abstract
Purpose
The study aims to the distribution rule of lubricating oil film of full ceramic ball bearing and improve its performance and life.
Design/methodology/approach
The paper established an analysis model based on the fluid–solid conjugate heat transfer theory for full ceramic ball bearings. The distribution of flow, temperature and pressure field of bearings under variable working conditions is analyzed. Meanwhile, the mathematical model of elastohydrodynamic lubrication (EHL) of full ceramic ball bearings is established. The numerical analysis is used to study the influence of variable working conditions on the lubricant film thickness and pressure distribution of bearings. The temperature rise test of full ceramic ball bearing under oil lubrication was carried out to verify the correctness of simulation results.
Findings
As the speed increased, the oil volume fraction in full ceramic ball bearing decreased and the surface pressure of rolling element increased. The temperature rise of full ceramic ball bearings increases with increasing speed and load. The lubricant film thickness of full ceramic ball bearing is positively correlated with speed and negatively correlated with load. The pressure of lubricating film is positively correlated with speed and load. The test shows that the higher inner ring speed and radial load, the higher the steady-state temperature rise of full ceramic ball bearing. The test results are in high agreement with simulation results.
Originality/value
Based on the fluid–solid conjugate heat transfer theory and combined with Reynolds equation, lubricating oil film thickness formula, viscosity temperature and viscosity pressure formula. The thermal analysis model and EHL mathematical model of ceramic ball bearings are established. The flow field, temperature field and pressure field distribution of the full ceramic ball bearing are determined. And the thickness and pressure distribution of lubricating oil film in the contact area of full ceramic ball bearing were determined.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2023-0126/
Keywords
Acknowledgements
The authors acknowledge the collective support granted by the National Natural Science Foundation of China (Grant No. 52105196), the Education Department of Liaoning Province (Grant No. LJKMZ20220936), Young and Middle-aged Innovation Team of Shenyang (Grant No. RC210343) and National Defense Science and Technology Innovation Zone Plan: Ultra-High Precision Ceramic Bearing (No. 20–163-00-TS-006-002-11).
Citation
Sun, J., Fang, X., Yao, J., Zhang, Z., Guan, R. and Zhang, G. (2023), "Thermal characteristics and distribution rule of lubrication film of full ceramic ball bearing under different service condition", Industrial Lubrication and Tribology, Vol. 75 No. 8, pp. 919-932. https://doi.org/10.1108/ILT-05-2023-0126
Publisher
:Emerald Publishing Limited
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