【作者】 张凡；

【导师】 鲍际平；

【作者基本信息】 北京林业大学 ， 车辆工程， 2011， 硕士

【摘要】 本文针对某公司生产的Φ430干式膜片弹簧式离合器,为解决其在使用中出现的压盘变形、烧蚀等导致部分零件提前失效的现象,在综合分析了导致失效的可能原因基础上,通过硬度测定试验检测了压盘摩擦表面的硬度分布,表明压盘材料和制造工艺是导致压盘热损坏的原因之一,厂家需要改进压盘材料的合金配比和制造工艺；此外,本文以滑磨功为依据,对离合器客观工况进行了划分；使用有限元软件ABAQUS,针对不同工况进行了热-力耦合仿真分析,求解了压盘温度场及热应力场分布云图,结果表明在极限重载工况下,其抗拉强度安全系数不足是导致异常损坏的主要原因；依据分析结果,提出了空气冷却式压盘改进方案并获得实用新型专利授权(20246052.1),改进后的空气冷却式压盘在减轻重量的同时降低了压盘实心结构产生的热应力,减少了热变形,提高了离合器工作可靠性。更多还原

【Abstract】 In this paper, a type of 0430 clutch pressure plate produced by certain company is analyzed. Deformation, erosion and cracking phenomena during using, which may lead to early failure of the clutch pressure plate was analyzed numerically. The material and manufacturing process is considered to be one of the factors leading to the failure of pressure plate based on the hardness tests of the friction surface. What’s more, nonlinear finite element code ABAQUS is employed for the simulation. The temperature field and the thermal stress field were obtained depending on working conditions of the clutch. According to the result, the danger point centralized on the outer edges and the mounting holes of the friction surface. The main reason of the damage of the pressure plate is the insufficient strength when working in the heavy-load condition. Based on the analysis, a new type of air-cooling pressure plate is developed. The developed pressure plate reduces the thermal stress and deformation caused by the solid structure, which improves the efficiency of the vehicle. The conclusion is of significant meaning for improving the reliability of the pressure plate.更多还原