恶劣工况下离合器压盘热变形分析及改进研究

Research on the Thermal Deformation of the Clutch Pressure Plate and Its Improvement Under the Extreme Conditions

汽车离合器压盘在恶劣工况下易出现烧蚀、变形等情况,进而导致离合器传递扭矩能力下降。针对某公司生产的准430离合器,建立了压盘的有限元模型。计算出压盘表面的热流密度并作为边界条件施加到有限元模型上。利用ANSYS对压盘进行热-结构耦合分析。得出压盘在连续接合和持续滑磨两种恶劣工况下压盘的温度场及变形场分布。并针对该分布提出一种新的结构改进设计方案。结果表明,改进后的压盘变形量有所降低,重量减轻达11%,压盘工作性能提升明显。

The clutch pressure plate will be erosion, large deformation, etc. in the extreme operation conditions, which result in the reducing of the transmit clutch torque.the finite element model of the clutch pressure plate with diameter of 430mm was established. The heat flux density on the surface of the pressure plate was calculated and applied to the finite element model as the thermal boundary conditions. The thermal-structural coupling analysis of the pressure plate under the extreme conditions was carried out by utilizing ANSYS software. The temperature distribution and the deformation distributions of the pressure plate were obtained in the specific continued engagement ＆ separation process and the continued slipping process, respectively. A new improvement scheme of the pressure plate was proposed according to the field distribution above. The results show that, the improved pressure plate deformation was decrease, the weight of pressure plate was reduced 11%, and the performance of the pressure plate was significantly enhanced.