The Heat Balance Of Hydraulic Drive Of Engineering Vehicle Simulation Analysis

With Hydraulic torque converter as the core of Hydraulic transmission hasbecome the main form of engineering vehicle driveline. It has good adaptability,step-less variable speed and vibration isolation effect, but also faced with manyproblems to be solved, such as low transmission efficiency, high temperature inthe lower transmission ratio.Take the hydraulic torque converter of SD high drive bulldozer as aresearch object. The article analyses and calculates heat productivity, emissionand oil temperature in the exits of hydraulic transmission system on the wholewhen it is coming to thermal equilibrium. On the basis of this conclusion, inorder to further analysis the main factors which influence the efficiency ofhydraulic torque converter, three-dimensional full flow channel model is built byPro-E software on the basis of computational fluid dynamic, and then, the modelis imported into Fluent software, where user can divide mesh, set boundaryconditions, choose appropriate turbulence model and discrete form. The fluidmotion is simplified by various rotating reference frame. So after many times ofiterations, the flow field and temperature distribution of torque converter can begotten. The article finds the main reasons for high oil temperature throughanalyzing them and related improvement and optimization measures are putforward.In addition, the paper compare original characteristics curve of hydraulictorque converter by simulation to the test result, which shows that the accuracyof simulation result indirectly. Therefore, the study provides certain referencefor optimizing the design of torque converter. It is positive to shorten designcycle, improvement the transmission efficiency and reduce the numbers of test.