Experimental and numerical studies on erosion damage in damping holes on the valve plate of an axial piston pump
Experimental and numerical studies on erosion damage in damping holes on the valve plate of an axial piston pump
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DOI：
10.1007/s12206-017-0827-4
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发表时间：
2017-09
影响因子：
1.6
通讯作者：
Shaogan Ye;Jun-hui Zhang;Bing Xu;Wei Song;Long Chen;Haiyong Shi;Shiqiang Zhu
中科院分区：
文献类型：
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作者：
Shaogan Ye;Jun-hui Zhang;Bing Xu;Wei Song;Long Chen;Haiyong Shi;Shiqiang Zhu
冲蚀损伤影响轴向柱塞泵的可靠性和耐久性。对轴向柱塞泵进行了疲劳寿命试验。利用激光共聚焦扫描显微镜观察了阀片的冲蚀损伤现象，并对疲劳寿命试验前后阀片表面进行了对比。建立了考虑空化效应的CFD湍流模型，并对该模型进行了数值模拟.分析了轴向柱塞泵内部的流动物理特性，包括流体速度场、速度场、气体和蒸汽的总体积分数场以及压力场。分析了造成冲蚀破坏的两个原因，即大量水蒸气的出现和射流的直接冲击。第一个原因是在入口到出口的过渡区附近的表面上的冲蚀损伤的原因，第二个原因是在出口到入口的过渡区附近的表面上的冲蚀损伤的原因。此外，研究结果表明，流体速度密切相关的侵蚀破坏面积。该研究为轴向柱塞泵冲蚀损伤的发生提供了依据。
Erosion damage affects the reliability and durability of axial piston pumps. An axial piston pump was tested using endurance life testing method. The phenomenon of erosion damage on the valve plate was observed using a confocal laser scanning microscope, by comparing the surface on the valve plate before and after the endurance life testing. A CFD turbulence model inclusive of the cavitation effects was developed to predict the flow physics. The flow physics in the axial piston pump were presented and analyzed, including the fluid velocities, velocity fields, the total volume fraction fields of gas and vapor, and pressure fields. Two causes of erosion damage were found, the appearances of large amount of vapor, and directly hitting by the jetting flow. The first one is the cause of erosion damage on the surface near the transition region from the inlet port to the outlet port, and the second one is the cause of erosion damage on the surface near the transition region from the outlet port to the inlet port. Besides, the findings show that the fluid velocities closely relate to the area of erosion damage. The study provides insights into the occurrence of erosion damage in axial piston pumps.