Research On Characteristics Of Axial Plunger Motor Based On Virtual Prototype

The swash plate type axial piston motor is the power component of the actuator in the hydraulic system.Its operating state,efficiency and reliability largely determine the overall efficiency and reliability.Therefore,how to study the characteristics of the plunger motor with low cost and high efficiency,and then improve the life of components and improve the working performance of excavators through structural optimization has become an urgent need in the market today.At present,the literature on the characteristics of the axial piston motor is mainly divided into two methods: the theoretical model to derive the characteristics of the piston motor and the analogy of the characteristics of the piston motor based on the characteristics of the piston pump.The essential factor modeling has a lot of simplifications,and there is a big deviation from the performance of the physical prototype.This article focuses on the nine-plunger swash plate axial plunger motor as the research object.Firstly,based on a full understanding of the working principle of the axial piston motor,a corresponding mathematical model was constructed,and the main parameters affecting the dynamic characteristics of the piston motor were extracted from it.Secondly,a digital model of the plunger motor was established based on the PRO/E platform,the hydraulic system module of the plunger motor and the mechanical component module were built based on the AMESim platform and the ADAMS platform,and the corresponding data interaction interface was established to construct the hydraulic-mechanical coupling model of the plunger motor..Thirdly,based on the mechanical-hydraulic coupling model of the plunger motor,the dynamic characteristics of the motor and the mechanism of vibration and noise under different working conditions are analyzed,and the possibility of vibration reduction and noise reduction is explored.Improving the structure of the plunger motor housing can achieve the purpose of reducing vibration and noise.Finally,the ANSYS module under the WORKBENCH platform was used to flexibly process the key components of the plunger motor,and the rigid-flexible coupling model of the plunger motor was built based on the modal neutral file.Based on the rigid-flexible coupling model,the stress and strain of the plunger is obtained,and it is found that the more serious stress concentration is in the part of the plunger neck close to the plunger body.The improvement of its structure can effectively improve the service life of the plunger motor.Compared with the mathematical model,the simulation result of the axial piston motor based on the virtual prototype has a deviation of about 3%,which fully reflects the correctness of the model.Compared with other modeling methods and experimental data,the virtual prototype model has higher accuracy in terms of output torque,stress and strain characterization,and fully reflects the accuracy of the virtual prototype model.Therefore,the virtual prototype model of the axial piston motor established in this paper can provide an efficient and accurate research method for the performance evaluation and improvement of the piston motor.