Analysis and Revision of Torque Formula for Hydro-viscous Clutch

Xiangping Liao, Shuai Yang, Dong Hu and Guofang Gong
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Xiangping Liao: College of Mechanical Engineering, Hunan University of Humanities, Science and Technology, Loudi 417000, China
Shuai Yang: College of Mechanical Engineering, Hunan University of Humanities, Science and Technology, Loudi 417000, China
Dong Hu: College of Mechanical Engineering, Hunan University of Humanities, Science and Technology, Loudi 417000, China
Guofang Gong: State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Energies, 2021, vol. 14, issue 23, 1-14

Abstract: Hydro-viscous clutch is a speed-regulating device for heavy fans and water pumps. It has important engineering significance in the fields of soft-start for rotating machinery. More and more attention has been paid to its torque and control characteristics. This paper is focused on the torque formula for hydro-viscous clutch (HVC), assuming that multi-friction plates distribute ununiformly with different oil film thickness. A mathematical model of friction plates was constructed, then the distribution formula of the oil film thickness was obtained. A new expression was presented using a modified factor. Parameters such as pressure, viscous torque, and oil film thickness were obtained. The results show that each clearance of friction plates is not the same and the distribution of oil film thickness is influenced by pressing force, groove depth, angular ratio of groove/non-groove, and static friction force. To verify the proposed expression, relevant experiments were carried out on an HVC with multi-friction plates, and the experimental results indicate that the new expression is more accurate compared to the original one.

Keywords: different oil film thickness; hydro-viscous clutch; hydro-viscous drive; multi-friction plates; torque formula (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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