Simulation Analysis Of Four-valve Axial Piston Motor Based On Virtual Prototype

With the rapid development and growing of construction machinery,hydraulic system has become an indispensable part of construction machinery.Among them,the axial piston motor is an important component in the hydraulic system,and its performance will have a non-negligible impact on the overall efficiency of the hydraulic system.If the physical test is used alone,the dynamic characteristics of the plunger motor cannot be accurately obtained,and the internal conditions of the plunger motor are complex,and there are obvious elastic deformation and contact interference between the components.Therefore,this paper studies the four-valve axial piston motor with the help of virtual prototype technology,which provides a means for the structural design and optimization of the piston motor.First of all,this paper uses Solidworks,a three-dimensional modeling software,to build the model of the four-valve axial piston motor.On the basis of fully understanding the working characteristics of the four-valve axial piston motor,the mechanical model and the hydraulic model are built using AMESim and ADAMS,and the data exchange variables and information of the two platforms are established.Based on the software interactive interface technology,the machine-hydraulic coupling model based on ADAMS software was established.Secondly,based on the mechanic-hydraulic coupling model,the kinematic characteristics of the plunger,the flow rate in the plunger cavity,the pressure and the output torque characteristics of the motor shaft under different working conditions are analyzed.It is concluded that the Angle of the swash plate and the output speed should be limited within a reasonable range in the actual production process.It is pointed out that the flow pulsation and pressure impact can be improved by optimizing the structure of the triangle groove of the valve plate.The mechanism of vibration and noise of plunger motor is investigated.The theoretical calculation of plunger motion is compared with the simulation analysis,and the output torque under the co-simulation mode and the single hydraulic software mode is compared,which shows the feasibility and correctness of the virtual prototype model.Finally,the plunger,slipper and spindle are processed flexibly in ANSYS platform,and the output modal neutral file is imported into ADAMS platform to replace the flexible body.The natural frequency and mode shape of the parts in the free state are obtained,and the rigid-flexible coupling dynamics model is established.Then,based on the rigid-flexible coupling model,the stress-strain situation of the component is obtained,and the maximum stress-strain position of the component is found.Meanwhile,the time history curve of the maximum stress-strain node of the spindle is obtained by analyzing the spindle.The angular velocity and angular acceleration of the spindle before and after flexibility are compared.The results show that the spindle after flexibility is more in line with the actual motion of the motor,which indicates the necessity and rationality of rigid-flexible coupling.It provides a solid theoretical basis for the structural design and optimization of domestic axial piston motor.