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液力变矩器作为一种有效的增矩变速元件广泛应用于车辆传动中。通过对某液力变矩器整周模型简化、网格划分,利用CFD(Computational Fluid Dynamics)技术对其进行流体计算,获取了液力变矩器内流场的速度及压力信息,得出全充液状态下的转速比i、变矩比K、泵轮转矩系数λ以及效率η,从而得到液力变矩器的原始特性曲线。对样机的台架试验结果与一维束流理论计算结果进行了对比分析,对仿真结果进行了验证,结果表明,三者在数值上吻合较好,说明三维流场数值计算方法应用于液力变矩器的性能预测是可行的,可以应用于工程实际。
Torque converter as an effective torque transmission element widely used in vehicle transmission. Through the simplification and meshing of the entire hydraulic model of a torque converter, the CFD (Computational Fluid Dynamics) technology was used to calculate the fluid flow, and the velocity and pressure information of the flow field in the torque converter were obtained. The liquid-filled state of the speed ratio i, torque ratio K, pump torque coefficient λ and efficiency η, so as to obtain the original torque converter curve. The bench test results of the prototype are compared with those of the one-dimensional beam theory, and the simulation results are verified. The results show that the three agree well with each other, which shows that the three-dimensional flow field numerical calculation method is applied to the hydraulic Torque converter performance prediction is feasible and can be applied to engineering practice.