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Channel: Emerald Group Publishing Limited: Industrial Lubrication and Tribology: Table of Contents
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Temperature rise characteristic of MR fluid in a multi-disc MR clutch under slip condition

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Industrial Lubrication and Tribology, Volume 67, Issue 2, March 2015.
Purpose This study is aiming at revealing the temperature rise characteristic of magneto-rheological (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 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 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 MR fluid. Findings The results show that the 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 circumferential direction is basically the same but it presents slightly lower in the groove area. The temperature of 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 in circumferential directions are experimentally measured going beyond the estimation by computer simulations. And 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.

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