A New Type Of Water Hydraulic Variable Pump (Motor) Developed By Virtual Prototype

Hydraulic pump is the power component of the hydraulic system and has been widely used in national economy for its various types and different control methods. Compared to traditional pump, this thesis presents a new type of hydraulic pump which is based on the structure of piston pump and combined with feature of vane pump: Absorbing the pattern of rotor moving along the curve of stator into new piston’s axial movement. Due to the combination of the advantages of piston and vane pump, the new pump has the characteristic of stable displacement, low noise emission and high volumetric efficiency.The traditional design method requires prototype testing which results in high cost and long period. Therefore, this thesis uses the method of building up a virtual prototype of the new pump. Firstly, calculating key parameters of the new pump and using Solidworks software to draw a three-dimensional model; secondly, using the hydraulic system simulation software AMEsim to build the models of piston and then packaging them into a pump model; thirdly, importing the three-dimensional model into ADAMS software and taking dynamic analysis through adding constraints and defining drivers;fourthly, using the interface between ANSYS and ADAMS to build the hydromechatronical virtual prototype; Finally, building rigid-flexible model of the new pump through the data exchanging between ANSYS and ADAMS. Furthermore,taking finite element analysis for shaft and new piston under the environment of Workbench.During the study of the new pump’s virtual prototype,this thesis mainly analyses the hydraulic force of new piston,outlet flow of the new pump and outlet pressure under different outlet volumes.In terms of new piston’s movement,thesis carries out analysis of velocity and acceleration as well as researching the force on front and back bearings. After finishing the rigid-flexible model, thesis analyses displacement,stress and strain of key parts under the environment of Workbench in order to determine the reliability of shaft and piston as well as providing theoretical basis to improve the new pump.