Experimental and Numerical Analysis of an Axial Piston Pump: A Comparison Between Lumped Parameter and 3D CFD Approaches

E. Frosina, G. Marinaro, A. Senatore
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引用次数: 11

Abstract

In this paper an axial piston pump is studied using numerical and experimental approaches. The pump, manufactured by the company Continental Hydraulic Inc., has a maximum operating pressure limit of 280 bar and a displacement of 65.9 cm3/rev; it is a variable swashplate design with nine-piston, suitable for open circuit application, medium to high pressure. Two numerical approaches have been compared to simulate the pump units. First of all, an accurate 3D -CFD model has been built up putting emphasis on the description of the detailed features of the flow through the unit. Specific attention has been reserved to the flow losses due to cavitation. Then a fast-lumped parameter approach has been built up focusing the attention on the valve plate geometry. Using the proposed numerical approaches, it is possible to fully understand the unit operation with, obviously, different assumptions and level of result details. Numerical models have been validated with an experimental data performed by the pump manufactured on their test ring with high agreement. As results, the proposed analysis permit to gain a high level of understanding of the operation of the unit finding the critical aspects and giving important information to the designer in order to improve the pump performance. By the end a new valve plate has been designed to improve the pump volumetric efficiency and to reduce the flow ripples and the reverse flow.
轴向柱塞泵的实验与数值分析:集总参数与三维CFD方法的比较
本文采用数值方法和实验方法对轴向柱塞泵进行了研究。该泵由Continental Hydraulic Inc.公司制造,最大工作压力限制为280 bar,排量为65.9 cm3/rev;九活塞式可变斜盘设计,适用于开路、中高压场合。对两种数值模拟方法进行了比较。首先,建立了精确的三维cfd模型,重点描述了机组内流动的详细特征。特别注意的是由于空化引起的流动损失。在此基础上,建立了一种快速集总参数求解方法,重点关注配流盘的几何形状。使用所提出的数值方法,可以充分理解单元操作,显然,不同的假设和结果细节水平。数值模型与在试验环上制造的泵的实验数据进行了验证,具有较高的一致性。因此,建议的分析允许获得对机组运行的高水平理解,找到关键方面,并为设计人员提供重要信息,以提高泵的性能。最后设计了一种新的配流板,以提高泵的容积效率,减少流量波动和逆流。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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