Mechanical-Hydraulic Co-Simulation Study On Luffing Winch System Of Truck Crane

The users of a 25 ton truck crane of an enterprise found in the process of using the actual crane hoist hoist hook hydraulic impact and composite action start and stop impact problem,the crane stability and safety is insufficient.In order to improve the product quality,this paper takes the hoisting system of crane as the main research object,and the main work is as follows:(1)Establish its mathematical model according to the flow continuity equation of hydraulic components and the differential equation of spool motion.Based on the power bond graph theory and AMESim software,the hydraulic components and hydraulic system model of crane are established,and the hydraulic system simulation is carried out to verify the correctness of the simulation model.Based on the multi-body dynamics theory and ADAMS software,the rigid-flexible coupling model of crane jib is established.ADAMS is used as the main simulation interface,the AMESim variable amplitude winch hydraulic system model and ADAMS mechanical system model are connected,and the co-simulation model is established.(2)A total of 13 groups of real vehicle experiments of winch single action,lube single action and lube winch compound action were carried out.The experimental data were recorded,and then the co-simulation was conducted.The experimental results were compared with the simulation results,and the curve trend and steady-state value errors were analyzed to verify the accuracy of the co-simulation model.(3)Analyze the causes of drop hook hydraulic impact and compound action impact,and observe the dynamic characteristics of drop hook hydraulic impact with different parameter Settings through batch simulation research on important component parameters of winch balance valve.In view of the hydraulic impact of winch hook and the composite action start-stop impact,the optimization scheme of hydraulic component parameters and the optimization of control strategy are proposed,and the simulation is carried out to solve the two problems existing in the current truck crane theoretically.