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为研究液力变矩器结构对其工作性能的影响,应用正交表安排泵轮叶栅进、出口角参数进行试验设计,借助多重参考系(multiple reference frame,MRF)技术对液力变矩器内流场进行仿真,选择失速变矩比和最高传动效率作为评价指标,分析结构参数对性能的影响。对仿真结果的极差和方差分析表明:增大叶栅进口角或减小叶栅出口角,可降低失速变矩比,同时,最高传动效率也得到改善;叶栅出口角对失速变矩比和最高传动效率都有非常显著的影响,叶栅进口角对失速变矩比显著性影响较小。此外,对结果的回归分析确定了叶栅关键参数对液力变矩器性能影响程度的定量关系,并由此建立了高拟合度的二次回归方程,为液力变矩器的参数设计与分析提供参考依据。
In order to study the influence of torque converter structure on its performance, the orthogonal design was used to design the pump impeller entrance and exit angle parameters for experimental design. With multiple reference frame (MRF) The flow field in the simulator was chosen to select the stalling torque ratio and the maximum transmission efficiency as the evaluation indexes to analyze the influence of structure parameters on the performance. The range and variance analysis of the simulation results show that: increasing the entrance angle of the cascade or reducing the exit angle of the cascade can reduce the stalling torque ratio, and meanwhile, the maximum transmission efficiency is also improved; and the exit angle of the cascade to the stalling torque ratio And the maximum transmission efficiency have a very significant impact, the entrance angle of the cascade stall torque significantly less affected. In addition, the regression analysis of the results determines the quantitative relationship between the key parameters of the cascade and the performance of the torque converter, and establishes the quadratic regression equation with high fitting degree to design the parameters of the torque converter And provide a reference for analysis.