某双阀芯电液比例多路阀主阀进口节流流场及阀口压降特性研究
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摘要
以某系列双阀芯电液比例多路阀为研究对象,采用CFD流场仿真技术和PIV可视化测速技术对不同阀口开度和流量下的主阀沿进口流道、节流口、阀腔的流场进行了流体仿真和试验可视化研究。应用Fluent软件仿真研究了主阀进口节流流场分布并得出阀口压降特性;采用PIV试验研究的手段对流场分析结果加以验证,应用2D-PIV技术获得主阀腔内部一个截面上的流场分布,并通过相似理论计算得出阀口压降特性。CFD流场仿真和PIV试验结果表明:该双阀芯电液比例多路阀主阀出油环形腔内会形成较大旋涡,且阀口开度和流量对主阀进口节流内部流场结构和阀口压降特性有重要的影响。研究结果对定性分析双阀芯电液比例多路阀主阀内能量损失和噪声、主阀的结构和流道的设计以及优化具有重要实际意义,为CFD技术和PIV技术在双阀芯多路阀领域的应用研究提供了参考。
Taking a dual spool electro-hydraulic proportional multi-way valve as the research object,the flow field of main valve along the inlet flow channel,the orifice and valve cavity under different valve opening conditions and flow rate were studied by simulations and experiments using CFD simulation and PIV technology.The flow field,the main valve inlet throttle and the pressure drop characteristics were obtained and the results of flow field analysis were verified by means of PIV test.2D-PIV technology was used to obtain the flow field distribution on a cross section of the main valve cavity,and the valve port pressure drop characteristics were calculated by similar theory.The results show that a larger vortex may be formed along the main valve outlet ring cavity,and the valve opening conditions and flow rate have important influences on both inlet throttle internal flow structure of the main valve and valve pressure drop characteristics.It has great practical significance for qualitative analysis of energy loss,noise,design and optimization of structures as well as flow channels of the main valve.It also provides a reference for the applications of CFD simulation and PIV technology in the field of dual spool multi-way valves.
Taking a dual spool electro-hydraulic proportional multi-way valve as the research object,the flow field of main valve along the inlet flow channel,the orifice and valve cavity under different valve opening conditions and flow rate were studied by simulations and experiments using CFD simulation and PIV technology.The flow field,the main valve inlet throttle and the pressure drop characteristics were obtained and the results of flow field analysis were verified by means of PIV test.2D-PIV technology was used to obtain the flow field distribution on a cross section of the main valve cavity,and the valve port pressure drop characteristics were calculated by similar theory.The results show that a larger vortex may be formed along the main valve outlet ring cavity,and the valve opening conditions and flow rate have important influences on both inlet throttle internal flow structure of the main valve and valve pressure drop characteristics.It has great practical significance for qualitative analysis of energy loss,noise,design and optimization of structures as well as flow channels of the main valve.It also provides a reference for the applications of CFD simulation and PIV technology in the field of dual spool multi-way valves.
引文
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[2]张弓,黄静,邱容.基于CFD的电液比例阀液动力分析[J].机械设计,2010,27(6):93-96.ZHANG Gong,HUANG Jing,QIU Rong.Evaluation of the Flow Forces on an Electro-hydraulic Proportional Valve Based on CFD Analysis[J].Journal of Machine Design,2010,27(6):93-96.
[3]李楠,谢刚,施哲,等.基于激光PIV技术的XFD浮选机流场特性分析[J].光电子激光,2015(3):586-591.LI Nan,XIE Gang,SHI Zhe,et al.Flow Field Features Analysis of XFD Floatation Machine Based on PIV Technique[J].Journal of Optoelectronics·Laser,2015(3):586-591.
[4]张建华,李思文,沈忠良,等.PIV技术在脉动流传热试验中的应用[J].浙江工业大学学报,2014,42(1):109-113.ZHANG Jianhua,LI Siwen,SHEN Zhongliang,et al.The Application of PIV Technology on the Pulsating Heat Transfer Experiment[J].Journal of Zhejiang University of Technology,2014,42(1):109-113.
[5]QIE L W,XIA Q,ZHANG X,et al.Research on the Characteristics of the Vortex Field of Breakwaters by the PIV Technique[J].Marine Science Bulletin,2014(2):72-89.
[6]任芸,吴登昊,刘厚林,等.离心泵内部不稳定流动PIV测试[J].农业机械学报,2015,46(2):46-50.REN Yun,WU Denghao,LIU Houlin,et al.PIV Experiment on Flow Instabilities in Centrifugal Pump[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(2):46-50.
[7]孔祥东,宋豫,艾超,等.比例阀异形阀口流量特性PIV可视化试验研究[J].农业机械学报,2015,46(5):328-335.KONG Xiangdong,SONG Yu,AI Chao,et al.Visualization Experiment of Flow Characteristics of Special Shaped Valve Port in Proportional Valve Using PIV Technology[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(5):328-335.
[8]高殿荣,侯桂庆,杨林杰,等.进口节流式滑阀内流场的有限元计算与PIV研究[J].机械工程学报,2004,40(6):10-18.GAO Dianrong,HOU Guiqing,YANG Linjie,et al.Finite Element Numerical Simulation and PIV Investigation of Flow Field Inside Metering-in Spool Valve[J].Journal of Mechanical Engineering,2004,40(6):10-18.
[9]GAO D R.Investigation of Flow Structure Inside Spool Valve with FEM and PIV Methods[J].International Journal of Fluid Power,2004,5(1):51-66.
[10]GAO D R,QIAO H J,LU X H.Finite Element Numerical Simulation and PIV Measurement of Flow Field Inside Metering-in Spool Valve[J].Chinese Journal of Mechanical Engineering,2009,22(1):102-108.
[11]张晋.斜盘式轴向柱塞泵流体振动溯源研究[D].秦皇岛:燕山大学,2015.ZHANG Jin.The Source of Swash Plate Axial Piston Pump Fluid Vibration Research[D].Qinhuangdao:Yanshan University,2015.
[12]王福军.计算流体动力学分析——CFD软件原理与应用[M].北京:清华大学出版社,2004:1-3.WANG Fujun.Computational Fluid Dynamics Analysis—CFD Principles&Application[M].Beijing:Tsinghua University Press,2004:1-3.
[13]王瑞金,张凯,王刚.Fluent技术基础与实用实例[M].北京:清华大学出版社,2006:33-44.WANG Ruijin,ZHANG Kai,WANG Gang.Fluent Technical Basis and Practical Examples[M].Beijing:Tsinghua University Press,2006:33-44.
[14]江帆,黄鹏.Fluent高级应用与实例分析[M].北京:高等教育出版社,2008:8-28.JIANG Fan,HUANG Peng.Fluent Advanced Application and Case Analysis[M].Beijing:Higher Education Press,2008:8-28.
[15]傅德薰,马延文.计算流体力学[M].北京:高等教育出版社,2002:9-30.FU Dexun,MA Yanwen.Computational Fluid Dynamics[M].Beijing:Higher Education Press,2002:9-30.
[16]赵斌娟,袁寿其,刘厚林,等.双流道泵内非定常流动数值模拟及粒子图像测速测量[J].机械工程学报,2009,45(9):82-88.ZHAO Binjuan,YUAN Shouqi,LIU Houlin,et al.Numerical Simulation and Particle Image Velocimeter Measurement for Unsteady Turbulent Flow in Double-channel Pump[J].Journal of Mechanical Engineering,2009,45(9):82-88.