The Research Of Oblique Piston Pump Simulation Based On Virtual Prototype

Piston pump is a widely used, versatile, complex structure of the hydraulic power components. With the development of fluid power transmission and control techniques, the piston pump will be developed toward the direction of high pressure and large flow. It is increasingly becoming the most challenging factor of the product development speed and reliability. In order to research, design and develop high-performance piston pump, the way that only using traditional methods need processing of physical prototype and a variety of performance tests on the physical prototype. These take more time and cost. It is difficult to change parameters and conditions of the pump with the traditional design method. This paper will introduce virtual prototype technology into piston pump design and development area, it can get a precise simulation and analysis of hydraulic system and motion control part to improve the design level of piston pump.The research object in this paper is A4VSG750 swash plate pump with oblique pistons. The oblique piston pump assembly model is established in the UG three-dimensional design software. Hydraulic system simulation software AMESim and multi-system dynamic analysis and simulation software ADAMS are combined together. The virtual prototype model of oblique piston pump with mechanical and fluid integration is established through the interface between the two softwares. The core moving parts of the pump are changed to be flexible ones, a rigid-flexible coupling dynamic model of the pump is established through a data exchange between ADAMS and ANSYS.Having a simulation and analysis on the virtual prototype model of oblique piston pump with mechanical and fluid integration, export flow pulse characteristics of the pump and pressure changes in piston antrums can be studied, and its orderliness can be found out. The virtual prototype model can provide reference for the design of swash plate pump with oblique pistons by analyzing the movement and force on core parts at different operating conditions. Having a simulation and analysis on the rigid-flexible coupling dynamic model, the stress and strain of shaft and pistons at different operating conditions can be obtained. The results are used to analyze the strength of shaft and pistons, and can provide a theoretical basis for structure retrofit and system development of the pump.