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根据新型发动机对YJ350液力变矩器的匹配要求,对其进行改进。首先,修改循环圆参数,适当减小直径比和形状系数;其次,综合考虑叶片进出口角度对性能影响,对叶片进出口角度进行改进;最后采用基于二次函数环量分配的设计方法设计叶片。对新型YJ350液力变矩器三维流动进行数值模拟,得到内部流动速度与压力数值解,基于流场数值解预测其性能。将新型YJ350液力变矩器预测性能与原变矩器性能进行对比,结果表明改进后的液力变矩器满足新的匹配要求且性能明显提高。
According to the new engine YJ350 torque converter matching requirements, to improve it. Firstly, the parameters of the circular circle are modified to reduce the diameter ratio and the shape coefficient properly. Secondly, the influence of the angle of the inlet and outlet of the blade on the performance is considered, and the angle of the inlet and outlet of the blade is improved. Finally, the design of the blade based on the quadratic function . The numerical simulation of the three-dimensional flow of the new YJ350 torque converter was carried out, the numerical solution of internal flow velocity and pressure was obtained, and its performance was predicted based on numerical solution of flow field. The predicted performance of the new YJ350 torque converter is compared with that of the original torque converter. The results show that the improved torque converter meets the new matching requirements and the performance is obviously improved.