基于动网格的冲焊型液力变矩器流固耦合分析

Fluid structure interaction simulation on torque converter with dynamic mesh

以液力变矩器冲焊型叶轮为研究对象,采用基于弹簧光顺动网格的流固耦合分析方法,计算叶轮强度和形变并分析其影响.分析表明:冲焊叶轮的变形量与应力值随时间产生小幅度波动;涡轮由于油液冲击,在入口处产生较大变形并在涡轮外环与涡轮毂连接处产生应力集中,所受变形与应力及其波动幅值随涡轮转速的升高而降低;泵轮受油液载荷影响的变形较小,主要在叶片出口处发生变形,应力分布较均匀.

Stamping-welded torque converter as the research object had been analyzed on the strength by fluid structure interaction （FSI） based on spring smoothing dynamic mesh. The results indicate that the deformation and stress is slightly fluctuating with time. Because of the hydraulic impact, the location of max deformation of turbine locate on the inlet of blade and the max stress locate on the connection of blade and shell. Deformation and stress show an inverse trend with the speed of turbine. Pump has a lower deformation on the outlet and deformation occurs mainly in the export of the blade, in which the stress distribution is more uniform.