Analysis of Temperature Field of Wet Clutch Considering Contact Stress Field and Cooling Flow Field of Friction Pair

doi:10.3901/JME.2020.22.190

Abstract

Abstract: Temperature plays an important role in friction characteristics and thermal failure of wet clutch friction pairs. In order to obtain the distribution of the temperature field of the wet clutch, the finite element model of the contact stress distribution of the friction pair and the numerical calculation model of the cooling flow field in the groove of the friction plate are established. The variation of the contact stress of the friction pair with the clutch engagement oil pressure and the variation of convective heat transfer in the cooling flow field with the clutch speed are obtained. On this basis, a numerical model of clutch temperature field considering the time-varying characteristics of contact stress distribution and cooling flow field distribution is proposed. The simulation results of the temperature field model are compared with the experimental results to verify the correctness of the temperature field model. The temperature distribution of different separator plates in the radius and thickness directions during the wet clutch engagement process is obtained. The influences of the contact stress field of the friction pair and the cooling flow field in the groove of the friction plate on the temperature field of the clutch are revealed. The results show that the temperature distribution is consistent with the contact stress distribution in the radial direction of the clutch friction pair. The convective heat transfer of the cooling flow field in the groove of the friction plate mainly affects the temperature distribution of the clutch locked phase.

Key words: wet clutch, stress field, flow field, temperature field, numerical calculation

CLC Number:

U463

WU Bangzhi, QIN Datong, HU Jianjun, LIU Yonggang. Analysis of Temperature Field of Wet Clutch Considering Contact Stress Field and Cooling Flow Field of Friction Pair[J]. Journal of Mechanical Engineering, 2020, 56(22): 190-200.

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