The Matching Study About Hydraulic Drive System Of Forklift

Forklift truck as an industrial vehicles, the production volume issmall,varieties and specifications of its special engine and torque converter arevery few, and the choice is small.At the same time, the matching of forkliftengine,torque converter and transmission system affects the dynamicperformance and the fuel economy of forklift truck. This article is the studyabout matching of the combination only for several fixed models of engine, thetorque converter and different transmission.Firstly, according to the characteristics of forklift engines and torqueconverter, establish mathematical models of engine characteristics. In-depthstudy of the outer characteristics of the torque converter, the originalcharacteristics, complete features and input characteristics, and establishmathematical models of the original features and input characteristics. Give thetheory, principles of matching and the key influencing factors, and put forwardthe reasonable calculation method of matching.Followed to analysis the impact of the speed ratio of transmission system onthe dynamic performance. According to the requirements of the forklift ultimatedriving state, establish calculation expressions of the speed ratio of transmissionsystem, the most low ratio of gearbox and high-grade speed ratio. Give theevaluation indicators of the dynamic performance and the simulation methods ofthe fuel economy of forklift. For example, the matching calculation of the5tonsof hydraulic forklift verified the correctness of the simulation method.Finally,design the software about matching of hydraulic drive system offorklift on the VC++6.0development platform, to simulation the curves of thecharacteristics of engine, torque converte and the matching. Establish thecomprehensive evaluation of power function of forklift using Target PlanningAct. Achieve the selection of the engine, torque converte,and the determinationof the different ransmission system schemes quickly making use of procedures.Itavoids the cumbersome of manual calculations in the previous years andshortens the cycle of product development.