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Temperature rise characteristic of MR fluid in a multi-disc MR clutch under slip condition

Daoming Wang (School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei, People's Republic of China AND School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, People’s Republic of China)
Youfu Hou (School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, People’s Republic of China)
Zuzhi Tian (School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, People’s Republic of China)
Qingrui Meng (School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, People’s Republic of China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 9 March 2015

Abstract

Purpose

This study aims to reveal the temperature rise characteristic of magnetorheological (MR) fluid in a multi-disc MR clutch under slip condition, including the temperature distribution regularity and the impact factors.

Design/methodology/approach

Three-dimensional transient heat conduction equation for the MR fluid in the working gap was derived based on the heat transfer theory. Then, numerical simulation was conducted to analyze the temperature field of MR fluid. Furthermore, an experimental study was performed to explore the temperature distribution of the MR fluid in radial and circumferential directions, as well as the effects of disc groove, slip power and gap size on temperature rise characteristic of the MR fluid.

Findings

The results show that temperature appears to be largest in the center of the working gap and the temperature difference increases with the slip time. However, the temperature field in a circumferential direction is basically the same, but it presents slightly lower in the groove area. The temperature of the MR fluid increases linearly with the slip time and the rise rate increases with the slip power. Moreover, the temperature rise value decreases with the increase of gap size.

Originality/value

In this paper, the temperature gradients, both in radial and circumferential directions, are experimentally measured going beyond the estimation by computer simulations. In addition, the factors that influence the temperature rise characteristic of MR fluid were fully analyzed. The results could provide a reliable basis for the development of cooling technology for high-power MR devices.

Keywords

Acknowledgements

This work was supported by the National Natural Science Foundation of China (50975275 and 51075386), A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, as well as the Postgraduate Innovative Project of Jiangsu Province (CXZZ12_0926). Further, the authors acknowledge Xuzhou Wuyang Technology Co., Ltd for technical and financial support in production and debugging of the experimental system.

Citation

Wang, D., Hou, Y., Tian, Z. and Meng, Q. (2015), "Temperature rise characteristic of MR fluid in a multi-disc MR clutch under slip condition", Industrial Lubrication and Tribology, Vol. 67 No. 2, pp. 85-92. https://doi.org/10.1108/ilt-08-2012-0070

Publisher

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Emerald Group Publishing Limited

Copyright © 2015, Emerald Group Publishing Limited