湿式多片摩擦离合器对偶钢片热机耦合分析

针对湿式多片摩擦离合器对偶钢片会发生翘曲、裂纹等导致动力传递失效的问题,以某船用湿式多片摩擦离合器为研究对象,从摩擦热流生成和分配模型、温度场与耦合应力场的数值计算等方面提出了湿式多片摩擦离合器对偶钢片热机耦合问题的分析方法,揭示了对偶钢片发生热失效的机理。研究结果表明：在接合过程中,对偶钢片温度从内沿向外沿依次递增,在3 s的接合时间中摩擦表面温度在2.6 s达到最高点;热应力分布规律为内沿产生周向拉应力,外沿产生周向压应力,摩擦表面产生径向压应力,内部产生径向拉应力。为解决对偶钢片热失效问题提供了理论依据。

Thermo-mechanical coupling analysis of dual-steel-disc of wet multi-disk clutch

To solve the failure problem of power transmission caused by warping, crackle on dual-steel-disc of wet multi-disk clutch, a shipborne wet multi-disk clutch is taken as a research object, models of generation and distribution of friction heat flux are built and numerical methods to solve temperature field and coupled stress field are put forward. Research methods of thermo-mechanical coupling problem of wet multi-disk clutch are proposed. The thermo-mechanical coupling phenomenon of dual-steel-disc is investigated, and the failure mechanism of dual-steel-disc of wet multi-disk clutch is revealed. In the engagement process, the results of temperature field show that the temperature of the dual-steel-disc gradually increases from the inner edge to the outer edge, and the temperature of friction surface reaches the highest at 2.6 s in the 3-second-engagement. The rules of thermal stress distribution are attained that the circumferential tensile thermal stress appears in the region close to the inner edge, while the radial tensile thermal stress appears in the region close to the outer edge. The theoretical basis to solve the thermal failure problem of dual-steel-disc of wet multi-disk clutch is provided.