双涡轮液力变矩器超越离合器动载强度分析

Dynamic load strength analysis of over-running clutch of dual turbine torque

首先,根据装载机一个工作循环内十二个工况下所对应的发动机转速和变矩器的转速比,计算出双涡轮液力变矩器每个状态下所对应的Ⅰ涡和Ⅱ涡的转速。其次,依据转速在CFD中计算出不同时间内Ⅰ涡和Ⅱ涡的转矩,从而计算出不同时间内超越离合器滚柱与内、外圈的受力值。再次,采用有限元方法对超越离合器进行动态分析,得出内、外圈与滚柱的瞬时应力分布图。最后,给出产生最大应力的位置,为超越离合器的结构优化提供理论依据。

The dynamic load strength of over-running clutch of dual-turbine torque converter of a loader was analyzed. First, according to the engine speed and the speed ratio of the torque converter under 12 states in one working cycle, the speeds of I-turbine and II-turbine of the torque converter in each state were calculated. Second, based on the speeds, the torques of I-turbine and II-turbine in each state were calculated in CFD. Thus the stress of the roller, inner ring and outer ring of the over-running clutch in different period of time was calculated. Third, the over-running clutch was dynamically analyzed using finite element method, and the instantaneous stress distribution maps of the roller, inner ring and outer ring of the over-running clutch were obtained. Finally, the maximum stress position was given. This study provides a theoretical basis for the structural optimization of overrunning clutch.