Abstract
A numerical model for studying the time-dependent tribological performance of the floating valve-plate pair in axial piston pump is proposed. The lubrication analysis and the dynamics of the floating valve plate are taken into consideration. An additional source term is adopted into time-dependent Reynolds equation so that the model to analyze the auxiliary balance effects is set up. The boundary pressure of the kidney ports is dynamically coupled with the flow rate towards the loading. It is found that all the performance parameters fluctuate periodically and the valve-plate interface tilt has a vital impact on the tribological performances. The results obtained by the proposed model are highly detailed, and help to improve the understanding of floating valve-plate pair.
Highlights
As an important product to transmit mechanical energy into hydraulic energy, axial piston pump is widely used in multiple industrial fields including aerospace and engineering machinery.[1,2] The valve-plate pair including a valve plate and a cylinder block is one of the three key tribological pairs in an axial piston pump
The present work proposed a numerical model to predict the dynamic behavior of floating valve-plate pair
The model is capable of revealing the complex changing progress of the pressure distribution around the auxiliary balance structures and the film cavitation inside lubricating interface, which is superior to the analytical method
Summary
As an important product to transmit mechanical energy into hydraulic energy, axial piston pump is widely used in multiple industrial fields including aerospace and engineering machinery.[1,2] The valve-plate pair including a valve plate and a cylinder block is one of the three key tribological pairs in an axial piston pump. Each piston bore inside the cylinder block alternately connects to high pressure circuit and low pressure circuit via the corresponding kidney ports of valve plate. All the above models didn’t simulate the impact of time-dependent pressure change and boundary conditions in the lubricating interface between floating valve plate and fixed cylinder block.
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