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Numerical and experimental studies on the thermal characteristics of the clutch hydraulic system with provision for oil flow

Biao Ma (School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China)
Liang Yu (School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China)
Man Chen (School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China)
He Yan Li (College of Urban Transportation and Logistics, Shenzhen Technology University, Shenzhen, China)
Liang Jie Zheng (School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Publication date: 12 August 2019

Abstract

Purpose

This paper aims to investigate the thermal characteristics of the clutch hydraulic system under various oil flow conditions. Increasing the oil flow is one of the most important approaches to reduce the clutch temperature. However, the effect of the oil flow on the clutch temperature remains to be explored.

Design/methodology/approach

The thermal resistance network model and the lumped parameter method are used to study the thermal characteristics of the clutch hydraulic system. The predicted temperature variations of the clutch and the oil are compared with experimental data.

Findings

Results demonstrate that the larger the friction power is, the higher the temperatures of the clutch and the oil are. However, the temperature growth rates of the clutch and oil present different trends: the former decreases gradually and the latter increases constantly. Additionally, increasing the oil flow within a certain range gives rise to the decrease of clutch temperature and the increase of oil temperature; nevertheless, their variation trends are gradually weakening. When the oil flow is large enough, it brings a slight effect on the clutch temperature rise.

Originality/value

This paper extends the knowledge into the oil flow supply of the clutch hydraulic system. The conclusions can provide a theoretical guidance for the oil management of the transmission system. Additionally, the thermal resistance network model is also effective and efficient for other hydraulic equipment to predict the temperature variation.

Keywords

Acknowledgements

The authors are pleased to acknowledge support from the National Natural Science Foundation of China (Grant Numbers 51775045 and 51575042). Moreover, an earlier version of this paper was presented at the International Conference on EHST'18 (http://www.international-aset.com).

Citation

Ma, B., Yu, L., Chen, M., Li, H.Y. and Zheng, L.J. (2019), "Numerical and experimental studies on the thermal characteristics of the clutch hydraulic system with provision for oil flow", Industrial Lubrication and Tribology, Vol. 71 No. 6, pp. 733-740. https://doi.org/10.1108/ILT-07-2018-0256

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Publisher

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Emerald Publishing Limited

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