湿式多片离合器结构特征对接触压力特性的影响

Based on the structural characteristics of a wet multi-disk clutch, a finite element model and a thermodynamic model of a multi friction-pair system are developed. The influence of structural parameters on the contact pressure between friction pairs are studied, including backplate thickness, circlip width, and number of friction pairs. Moreover, the correctness of the numerical model is verified by clutch static pressure experiments. An index is employed to evaluate the pressure differences between friction pairs, and the optimal structural parameters of the clutch are proposed. The results show that the backplate thickness and circlip width have strong effects on the pressure difference, while the number of friction pairs only has a slight influence. The differences between the contact pressure and radial temperature of friction pairs can be significantly smoothed out by increasing the plate thickness and circlip width. As compared with the initial structural conditions, the maximum differences of the control pressure and radial temperature at the optimum condition are reduced by 82% and 61%, respectively.