Abstract:

In order to overcome the disadvantages of the existing performance analysis methods of torque converters,the response surface method is adopted to optimize the blade parameters of hydraulic torque converter based on the three-dimension flow simulation. In the investigation,first,the efficiency and torque ratio of the torque converter are calculated according to the simulated results and considering mechanical loss. Then,an optimal model of the blade is established based on the results of orthogonal test,with the highest efficiency as the target function,the starting torque ratio as the constraint and with a second-order polynomial as the response surface function. Finally,a optimization calculation is performed based on the proposed model. The results indicate that,after the optimization,the top efficiency increases by 3 points of percentage and the starting torque ratio increases by 4. 5%,which means that the proposed method is feasible.

Key words: hydraulic torque converter, optimized design, response surface method, orthogonal test, torque converter efficiency, starting torque ratio