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在湿式多片离合器滑摩过程中,摩擦元件之间的热流分配会受到厚度和摩擦材料特性的影响。针对有限厚摩擦元件,建立厚度方向上的有限元耦合传热模型,计算摩擦元件之间热流分配系数的变化过程,同时得到摩擦元件温度场。分析结果表明,热流分配系数会从初始值经过短时间上升,变化到另一个稳态值;将该热流分配规律与使用半无限厚模型所得的定热流分配系数对比,发现后者只能用于确定初始热流分配系数;进行离合器滑摩实验发现:使用变热流分配系数计算的钢片中平面温度上升过程非常接近实验结果,但使用固定热流分配系数则会高估实际的钢片中平面温度,而低估摩擦片温度。
During wet multi-plate clutch skating, the heat flow distribution between the frictional elements is affected by the thickness and friction material properties. A finite element coupled heat transfer model in the thickness direction was established for the finite thickness friction element to calculate the variation of the heat flow distribution coefficient between the friction elements and obtain the temperature field of the friction element. The analysis results show that the heat flow distribution coefficient changes from initial value to another steady state value after a short period of time. Comparing the distribution law of heat flow with the constant heat flow distribution coefficient obtained by semi-infinite thickness model, we find that the latter can only be used in The experimental results show that the plane temperature rise in the steel plate calculated by the variable heat flow distribution coefficient is very close to the experimental results. However, using the fixed heat flow distribution coefficient will overestimate the actual plate temperature in the steel plate, While underestimating the friction plate temperature.