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钣金型液力变矩器外特性计算方法

, PP. 74-81

Keywords: 车辆工程,液力变矩器,外特性,三维流场,变矩系数,公称力矩,平均误差

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Abstract:

对原有试验台架的信号处理和液压系统进行改进,进行了YJH315钣金型液力变矩器的牵引试验。应用三维流场数值计算方法,提出了YJH315钣金型液力变矩器外特性的动量矩方程、力矩方程与性能参数计算方法。分别通过MATLAB仿真软件和实测试验得到了不同转速比下的效率、变矩系数和公称力矩,并将仿真结果与试验结果进行对比分析。分析结果表明当转速比在0~0.9时,试验工况下的最大效率为0.82,仿真工况下的最大效率为0.79,效率的最大误差约为2%;试验工况下的最大变矩系数为2.41,仿真工况下的最大变矩系数为2.29,变矩系数的最大误差约为3%;试验工况下的最大公称力矩为28.7N?m,仿真工况下的最大公称力矩为27.3N?m,公称力矩的最大误差约为3%。3个指标的误差均在可接受范围之内,说明提出的钣金型液力变矩器外特性计算方法可行。

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