液力变矩器轴向力转速效应研究

Hydraulic torque converter is the core component of the transmission system in high-power tracked vehicles. Its axial force is one of the factors that affect its reliability and bearing capacity, and is obviously affected by the speed of each wheel. Therefore, in this paper, an axial force simulation model and experiment techniques were established for hydraulic torque converter to consider the inner and outer ring leakage areas, calculate the axial force under different speed conditions based on computational fluid dynamics model, and evaluate the results with the axial force test data. The research results show that the prediction error of the axial force simulation model for the axial force of each impeller of the hydraulic torque converter can reach within 10%. The axial force can increase along with impeller speed and the lower of speed ratio. The reason about the axial force changes of the pump impeller and turbine with impeller speed is mainly due to the flow formed on the turbine side by the back of the pump and turbine and the inner and outer rings of the impeller, while the axial force changes of the stator are mainly affected by the stator blades. This study can provide accurate axial force boundary conditions for the structural design and life design of hydraulic torque converter, and also can provide a reliable prediction model for axial force suppression technology.