58812 ANALYSIS OF THE PISTON/CYLINDER PAIR OF AXIAL PISTON PUMP BASED ON VIRTUAL PROTOTYPE(Fluid-Structure Interaction in MBS)

Purpose High pressure and high speed of the axial piston pump can improve its power density, but they also deteriorate the thermal-fluid-structure coupling effect of the friction pairs. This paper aims to reveal the coupling mechanism of the pump, for example, valve plate pair, by carrying out research on multi-physics field coupling. Design/methodology/approach Considering the influences of temperature on material properties and thermal fluid on structure, the thermal-fluid elastic mechanics model is established. A complete set of fast and effective thermal-fluid-structure coupling method is presented, by which the numerical analysis is conducted for the valve plate pair. Findings According to calculations, it is revealed that the temperature and pressure evolution laws of oil film with time, the pressure distribution law of the fluid, stress and displacement distribution laws of the solid in the valve plate pair. In addition, the forming history of the wedge-shaped oil film and mating clearance change law with rotational speed and outlet pressure in the valve plate pair are presented. Originality/value For an axial piston pump operating under high speed, high pressure and wide temperature range, the multi-physics field coupling analysis is an indispensable means and method. This paper provides theoretical evidence for the development of the pump and lays a solid foundation for the research of the same kind of problem.

Download Full-text

A Nonisothermal Fluid-Structure Interaction Analysis on the Piston/Cylinder Interface Leakage of High-Pressure Fuel Pump

Journal of Tribology ◽

10.1115/1.4026501 ◽

2014 ◽

Vol 136 (2) ◽

Cited By ~ 9

Author(s):

Dexing Qian ◽

Ridong Liao

Keyword(s):

High Pressure ◽

Interaction Analysis ◽

Fluid Structure Interaction ◽

Fluid Pressure ◽

Leakage Rate ◽

Fluid Structure ◽

Structure Interaction ◽

Piston Cylinder ◽

Piston Pair ◽

Nonisothermal Fluid

In this paper, a nonisothermal fluid-structure interaction mathematical model for the piston/cylinder interface leakage is presented. Full account is taken of the piston eccentricity, elastic deformations of the piston pair, the nonisothermal flow in the interface, and the physical properties of the fluid such as the pressure-viscosity and temperature-viscosity effects. The numerical method for the solution of the model is given, which can simultaneously solve for the fluid pressure distribution and leakage rate in the interface. The model is validated by comparing the calculated leakage rates with the measurements. Results show the good accuracy of the model. The impacts of parameters such as the piston diameter, the initial clearance between the piston pair, and the piston velocity on the leakage rate are discussed. Some of the conclusions provide good guidance for the design of high-pressure fuel pumps.

Download Full-text

The Research of Virtual Prototype Technology of Axial Piston Pump with Load-Sensing Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.308-310.2286 ◽

2011 ◽

Vol 308-310 ◽

pp. 2286-2290

Author(s):

Yuan Dong Chen ◽

Shu Mei Chen

Keyword(s):

Virtual Prototype ◽

Piston Pump ◽

Hydraulic Control ◽

Axial Piston Pump ◽

Mechanism Model ◽

Load Sensing ◽

Simulation Based ◽

Adams Software ◽

Control System Model ◽

Axial Piston

This article study something about establishing virtual prototype of axial piston pump based on the type of Vikers PVH98. Use ADAMS software to establish mechanism model and AMESim software to build hydraulic control system model respectively. Simulate the dynamic characteristics of the pump via coupling two models above-mentioned. Because of its clear in physical concept and easy change for parameters, the simulation based on virtual prototype is more convenient for studying the characteristics of piston pump.

Download Full-text