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高压变量轴向柱塞泵中的间隙流动模拟方法

Gap Flow Simulation Methods in High Pressure Variable Displacement Axial Piston Pumps.

作者信息

Zawistowski Tomasz, Kleiber Michał

机构信息

1Space Research Centre, Polish Academy of Sciences, Warsaw, Poland.

2Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland.

出版信息

Arch Comput Methods Eng. 2017;24(3):519-542. doi: 10.1007/s11831-016-9180-5. Epub 2016 Apr 26.

DOI:10.1007/s11831-016-9180-5
PMID:29962829
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6003390/
Abstract

High pressure variable displacement axial piston pumps are subject to complex dynamic phenomena. Their analysis is difficult, additionally complicated by leakage of the working fluid. Analytically gap flow is calculated with the Reynolds equation which describes the pressure distribution in a thin lubricating layer. The paper presents various approaches to analyze gap flow both in traditional axial piston pump and novel type of hydraulic pump, designed at the Polish Gdansk Institute of Technology. Because of large aspect ratio between the height of the gap and the size of pump elements, the authors present the numerical simulation approach using a local model to define a lubrication gap, linked to a global model of a pump from which boundary conditions were imported. User defined functions implemented in Fluent and Excel were used to calculate the pressure and velocity fields and assess the fluid flow rate.

摘要

高压变量轴向柱塞泵会出现复杂的动态现象。对其进行分析很困难，工作流体的泄漏更是雪上加霜。从分析角度来看，间隙流动是用雷诺方程来计算的，该方程描述了薄润滑层中的压力分布。本文介绍了多种分析传统轴向柱塞泵和波兰格但斯克工业大学设计的新型液压泵中间隙流动的方法。由于间隙高度与泵元件尺寸之间的纵横比很大，作者提出了一种数值模拟方法，即使用局部模型来定义润滑间隙，并将其与从泵的全局模型导入边界条件的泵的全局模型相链接。利用Fluent和Excel中实现的用户定义函数来计算压力和速度场，并评估流体流速。

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