水压轴向柱塞泵柱塞腔空化的仿真及影响研究

doi:10.16182/j.issn1004731x.joss.201801028

系统仿真学报 ›› 2018, Vol. 30 ›› Issue (1): 221-227.doi: 10.16182/j.issn1004731x.joss.201801028

水压轴向柱塞泵柱塞腔空化的仿真及影响研究

孙泽刚^1,2, 许明恒¹, 肖世德¹, 戴元龙³

1.四川理工学院机械工程学院,四川自贡 643000;
2.西南交通大学机械工程学院,四川成都 610031;
3.四川长江液压件有限责任公司,四川泸州 646006

收稿日期:2015-12-22 发布日期:2019-01-02
作者简介:孙泽刚(1975-),男,四川资中,博士生,副教授,研究方向为液压CFD分析。
基金资助:
国家重大科技专项(2010ZX04015-011), 四川省科技计划(2010GZ0093)

Study of Simulation and Influence of Plunger Cavity Cavitation Water Axial Piston Pump

Sun Zegang^1,2, Xu Mingheng¹, Xiao Shide¹, Dai Yuanlong³

1.School of Mechanical Engineering, Sichuan University of Science and Engineering, Zigong 643000, China;
2.School of Mechanical Engineering, Southwest Jiaotong University, Chendu 610031, China;
3.Sichuan Changjian Hydraulic Parts Limited Liability Company, Luzhou 646006, China

Received:2015-12-22 Published:2019-01-02

摘要/Abstract

摘要： 利用fluent软件的mixture (两相混合)模型及RNG κ-ε湍流模型,通过动网格、滑移网格模拟柱塞移动及缸体的转动,UDF(User Defined Function)设置流体的可压缩性,建立水压轴向柱塞泵有限元计算模型。发现柱塞腔的空化程度与m值(柱塞腔直径与缸体腰形孔当量直径的比值)有很大关系,并建立不发生空化m_c值的数学模型。经仿真分析发现：m值越小,柱塞腔中空化度越小。斜盘倾角β、缸体角速度ω越大,柱塞腔中不发生空化区域越小。通过研究,合理选择m值,可以减小柱塞腔的空化,减小柱塞泵的振动,提高柱塞泵容积效率,对轴向柱塞泵的设计具有实际意义。

关键词: 水压轴向柱塞泵, 空化, 动网格, 滑移网格

Abstract: The finite element calculation model of water axial piston pump is established by the mixture hybrid and RNG κ-ε turbulence model of the Fluent software. The plunger movement and cylinder rotary are simulated by the dynamic mesh and sliding mesh. The UDF (User Defined Function) is used to set the compressibility of the fluid. It is found that the cavitation degree of plunger cavity is strongly related to m value (the ratio of the diameter of the plunger cavity to the equivalent diameter of the cylinder kidney shape hole). The mathematical model of m_c without cavitation value is established. Simulation results shows thatn the smaller the m value is, the smaller the cavitation degree of the plunger cavity is. The bigger the angle β of the swash plate and the velocity ω of the cylinder block are, the smaller the un-cavitation area in the plunger cavity is. It is demonstrated that a reasonable choice of m value can reduce the cavitation of plunger cavity and vibration of the piston pump, improve the volumetric efficiency of axial piston pump, which has practical meaning for the design of axial piston pump.

Key words: water axial piston pump, cavitation, dynamic mesh, sliding mesh

中图分类号:

TH137.51

孙泽刚, 许明恒, 肖世德, 戴元龙. 水压轴向柱塞泵柱塞腔空化的仿真及影响研究[J]. 系统仿真学报, 2018, 30(1): 221-227.

Sun Zegang, Xu Mingheng, Xiao Shide, Dai Yuanlong. Study of Simulation and Influence of Plunger Cavity Cavitation Water Axial Piston Pump[J]. Journal of System Simulation, 2018, 30(1): 221-227.

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水压轴向柱塞泵柱塞腔空化的仿真及影响研究

Study of Simulation and Influence of Plunger Cavity Cavitation Water Axial Piston Pump

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