|
Its unique superiority has been widely applied in the field of automobile manufacturing, mining machinery , chemical industry, construction machinery , metallurgy , petroleum , military, and other torque converter . The easiest torque converter pump wheel , turbine and guide wheel . Pump wheel , turbine , the guide wheel said work round . By an engine driven pump wheel so that the liquid flow of the stream Daoli mechanical energy conversion into liquid energy ( mainly is the kinetic energy , followed by pressure energy ) , to obtain a liquid to the liquid by the pump wheel outlet high speed entering the turbine the inlet and flow Road , then by turbine outlet. The liquid in this process the energy is passed to the turbine, the turbine output torque , to drive the load , and its output torque and the rotational speed varies with load automatically change accordingly . By the the turbine outflow of liquid ( low-energy ) into rack fixed together non - rotating guide wheel , guide wheel transform the flow direction and then flow into the pump wheel . The torque converter pump wheel , turbine , blade shape of the guide wheel is very important , the internal characteristics of the torque converter , external characteristics , as well as its transmission efficiency has played a crucial role . Hence, the need to analyze the torque converter internal flow field characteristics of the different operating conditions to identify the main factors that affect its efficiency . This article take three main conditions to calculate the torque converter . The three conditions were at startup conditions (i.e., the transmission ratio is 0 ), the intermediate condition (i.e. the transmission ratio is 0.4 ), the condition of the maximum efficiency (i.e. the transmission ratio of 0.8 ) , and through the pump calculated from the equation wheel inlet velocity value , calculated by CFD software pump turns Road outlet pressure , using the velocity inlet and pressure outlet conditions of the flow field simulation of three working wheels , Vector to its internal nephanalysis and pressure by the speed of the simulation of the internal flow field flow field, the analysis of the main factors affecting the torque converter efficiency . The basic theory of fluid dynamics to analyze the performance of the torque converter , and derive the basic calculations relationship . The use of three-dimensional modeling software pro / e the overall torque converter model , three wheel runner modeling , flow channel model will be established by fluent software for the simulation of the internal flow field analysis .
|