Calculation and Verification of Three-dimensional Flow of Torque Converter Axial Force
Hydraulic torque converter is an important component of hydraulic transmission.It uses viscous oil as the working medium to convert and transmit power.It has excellent transmission characteristics such as continuously variable torque conversion and automatic adaptation.Due to the high-speed flow of the working medium,a large axial dynamic load is generated on each impeller,and at the same time,there is a large unbalanced area between different rotating domains inside,so that the torque converter has a high axial load during the working process.load.A torque converter with an effective diameter of 420 mm is taken as the research object,and a three-dimensional numerical simulation is carried out on the whole with a leaking cavity,and the axial force composition of each working wheel is analyzed,and an axial force test bench is built for the test.The test results show that the three-dimensional flow field simulation can calculate the axial force more accurately.It can be seen from the simulation analysis that the axial force generated by the action of the working liquid in the leakage area accounts for a large proportion.Among the three impellers,the axial force of the turbine is the smallest,which is about one-fifth of the pump wheel and the guide wheel.The axial force of the pump wheel always makes the pump wheel close to the guide wheel,and the axial force on the guide wheel always makes the guide wheel close to the pump.As the transmission ratio increases,the axial force of the pump wheel first increases and then decreases,and the axial force of the pump wheel is the largest when i=0.3;the axial force of the guide wheel decreases,and it is the largest when i=0.
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维普
