提出一种扁平化无内环液力变矩器,研究不同扁平率和有无内环对其性能的影响。采用基于椭圆的扁平循环圆设计方法,设计3种不同扁平率的无内环循环圆且叶形为空间扭曲的扁平化液力变矩器。利用CFD软件对不同扁平率的无内环变矩器进行数值模拟,分析了内部流场的压力和速度分布,得到了扁平率和有无内环对变矩器流场和性能的影响规律。

Regarding front-wheel drive passenger car, because of the limit of power transmission system space, a torque converter was developed to the flat shape. In this paper, a leaned blade flat torque converter was developed with an increasingly narrower torus's profile for the purpose of achieving a smaller axial size. It is composed of a pump having a leaned pump blade, a turbine having a leaned turbine blade and a stator, and the flatness ratio is 0.21. The core of the pump blade's inlet and outlet is opposite separately in the shell and moves 1/3 cascade spacing along the pump's hand of rotation. The core of the turbine blade's inlet and outlet is opposite separately in the shell along the turbine revolving and go astern 1/3 cascade spacing. The computational results indicate that the torque ratio decreases slightly but the torus is more flat when the blade is leaned. And the capacity factor decreases, the nominal torque improves, it may use the small effective diameter to satisfy the match request of passenger car with the same engine power, and it has more vital practical significance to solve the question of front-wheel drive layout's limit.