V形槽位置对偏导射流式伺服阀前置级液流特性的影响
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摘要
偏导射流级作为伺服阀关键部件,其偏转板上V形槽位置对前置级压力特性起决定性作用,进而影响了整个系统的稳定性。以某航空发动机用燃油电液伺服阀为研究对象,在分析其前置级结构及工作原理的基础上,建立偏导射流级三维模型,以Fluent流场仿真软件为平台,建立V形槽不同位置时的流场仿真模型,得到了V形槽不同横向位移及纵向偏移下左右接收孔恢复压力及压差,分析了V形槽不同偏移量对前置级压力增益及液流特性的影响,为偏导射流式伺服阀装配及调试提供了一定的参考依据。
The deflection plate jet servo valve has the advantages of reliable operation, strong anti-pollution ability and long service life, so it is often used in the aviation and aerospace fields. As a key component of servo valve, the position of V-groove on the deflector plays a decisive role in the pressure characteristics of the front stage, which affects the stability of the whole system. The research object is a fuel-electric electro-hydraulic servo valve for aeroengine. Based on the analysis of its pre-stage structure and working principle, a three-dimensional model of partial jet flow level is established. Based on the Fluent flow field simulation software, the flow field simulation model of V-grooves at different positions is established. The recovery pressure and differential pressure of the left and right receiving holes under different lateral displacements and longitudinal offsets of the V-groove are obtained. The influence of different offsets of V-groove on the pressure gain and flow characteristics of the pre-stage is analyzed. It provides some reference for assembling and debugging of deflective jet servo valve.
The deflection plate jet servo valve has the advantages of reliable operation, strong anti-pollution ability and long service life, so it is often used in the aviation and aerospace fields. As a key component of servo valve, the position of V-groove on the deflector plays a decisive role in the pressure characteristics of the front stage, which affects the stability of the whole system. The research object is a fuel-electric electro-hydraulic servo valve for aeroengine. Based on the analysis of its pre-stage structure and working principle, a three-dimensional model of partial jet flow level is established. Based on the Fluent flow field simulation software, the flow field simulation model of V-grooves at different positions is established. The recovery pressure and differential pressure of the left and right receiving holes under different lateral displacements and longitudinal offsets of the V-groove are obtained. The influence of different offsets of V-groove on the pressure gain and flow characteristics of the pre-stage is analyzed. It provides some reference for assembling and debugging of deflective jet servo valve.
引文
[1] 王春行.液压控制系统[M].北京:机械工业出版社,1999.WANG Chunxing.Hydraulic Control System [M].Beijing:China Machine Press,1999.
[2] DHINESH K S,ANDREW R P,CHRISTOPHER R B,et al.A Novel Piezohydraulic Aerospace Servovalve [J].Proc I MECH E,Part I:J.Systems and Control Engineering,2013,227(4):371-389.
[3] 冀宏,张硕文,刘新强,等.射流偏转板劈尖形变对其零位特性的影响[J].兰州理工大学学报,2018,44(3):45-49.JI Hong,ZHANG Shuowen,LIU Xinqiang,et al.Effect of Wedge Deformation of Jet Deflector on Its Zero-position Feature [J].Journal of Lanzhou University of Technology,2018,44(3):45-49.
[4] 张硕文.射流偏转板伺服阀阀口冲蚀及阀特性变化的仿真研究[D].兰州:兰州理工大学,2017.ZHANG Shuowen.The Simulation of Erosion on Servo Valve Orifice and Changes of Valve Characteristics on Jet Deflector Servo Valve [D].Lanzhou:Lanzhou University of Technology,2017.
[5] 邢晓文,吴凛,陈奎生,等.偏转板伺服阀射流放大器结构参数优化研究[J].液压与气动,2018,(3):16-21.XING Xiaowen,WU Lin,CHEN Kuisheng,et al.Research on Structural Parameters Optimization of Servo-valve Jet Amplifier with Deflection Plate [J].Chinese Hydraulics & Pneumatics,2018,(3):16-21.
[6] 邢晓文.偏转板伺服阀前置级流场建模及结构参数优化[D].武汉:武汉科技大学,2018.XING Xiaowen.Pre-stage Flow Field Modeling and Structural Parameter Optimization of Deflection Plate Servo Valve [D].Wuhan:Wuhan University of Science and Technology,2018.
[7] 任玉凯,延皓,白龙,等.不同湍流模型下偏导射流伺服阀前置级流场特性仿真[J].北京交通大学学报,2018,42(3):127-133,140.REN Yukai,YAN Hao,BAI Long,et al.Simulation on Flow Field Characteristics of Deflector Jet Servo Valve Pre-stage Under Different Turbulence Models [J].Journal of Beijing Jiaotong University,2018,42(3):127-133,140.
[8] 张雨.偏导射流伺服阀前置级流场仿真与试验研究[D].北京:北京交通大学,2018.ZHANG Yu.Flow Distribution Simulation and Experiment Study of the Jet Deflector Servo Valve’s Pre-stage[D].Beijing:Beijing Jiaotong University,2018.
[9] 蒋大伟,许明理.基于Fluent的偏转板射流伺服阀的前置级仿真[J].液压与气动,2016,(4):48-53.JIANG Dawei,XU Mingli.Simulation Based on Fluent for Pre-stage of Deflector Jet Servo Valve [J].Chinese Hydraulics & Pneumatics,2016,(4):48-53.
[10] 蒋大伟.偏转板射流伺服阀的前置级流场仿真与动态特性研究[D].镇江:江苏大学,2016.JIANG Dawei.Pre-stage Flow Field Simulation and Dynamic Characteristics of Deflector Jet Servo Valve [D].Zhenjiang:Jiangsu University,2016.
[11] 刘增光,杨国来,岳大灵,等.进出油阻尼孔对偏转板射流阀射流流场的影响[J].机床与液压,2017,45(5):133-138.LIU Zengguang,YANG Guolai,YUE Daling,et al.Influence of the Orifice on the Jet Flow Field of Deflector Jet Valve[J].Machine Tool & Hydraulics,2017,45(5):133-138.
[12] 刘增光,岳大灵,杨桢毅,等.喷嘴宽度对偏转板射流阀射流效率影响的仿真分析[J].液压与气动,2016,(10):27-32.LIU Zengguang,YUE Daling,YANG Zhenyi,et al.Simulation Analysis of the Influence of Nozzle Width on the Jet Efficiency of Deflector Jet Valve [J].Chinese Hydraulics & Pneumatics,2016,(10):27-32.
[13] 訚耀保,张鹏,岑斌.偏转板射流伺服阀前置级流场分析[J].中国工程机械学报,2015,13(1):1-7.YIN Yaobao,ZHANG Peng,CEN Bin.Pre-stage Flow Field Analysis on Deflector Jet Servo Valves [J].Chinese Journal of Construction Machinery,2015,13(1):1-7.
[2] DHINESH K S,ANDREW R P,CHRISTOPHER R B,et al.A Novel Piezohydraulic Aerospace Servovalve [J].Proc I MECH E,Part I:J.Systems and Control Engineering,2013,227(4):371-389.
[3] 冀宏,张硕文,刘新强,等.射流偏转板劈尖形变对其零位特性的影响[J].兰州理工大学学报,2018,44(3):45-49.JI Hong,ZHANG Shuowen,LIU Xinqiang,et al.Effect of Wedge Deformation of Jet Deflector on Its Zero-position Feature [J].Journal of Lanzhou University of Technology,2018,44(3):45-49.
[4] 张硕文.射流偏转板伺服阀阀口冲蚀及阀特性变化的仿真研究[D].兰州:兰州理工大学,2017.ZHANG Shuowen.The Simulation of Erosion on Servo Valve Orifice and Changes of Valve Characteristics on Jet Deflector Servo Valve [D].Lanzhou:Lanzhou University of Technology,2017.
[5] 邢晓文,吴凛,陈奎生,等.偏转板伺服阀射流放大器结构参数优化研究[J].液压与气动,2018,(3):16-21.XING Xiaowen,WU Lin,CHEN Kuisheng,et al.Research on Structural Parameters Optimization of Servo-valve Jet Amplifier with Deflection Plate [J].Chinese Hydraulics & Pneumatics,2018,(3):16-21.
[6] 邢晓文.偏转板伺服阀前置级流场建模及结构参数优化[D].武汉:武汉科技大学,2018.XING Xiaowen.Pre-stage Flow Field Modeling and Structural Parameter Optimization of Deflection Plate Servo Valve [D].Wuhan:Wuhan University of Science and Technology,2018.
[7] 任玉凯,延皓,白龙,等.不同湍流模型下偏导射流伺服阀前置级流场特性仿真[J].北京交通大学学报,2018,42(3):127-133,140.REN Yukai,YAN Hao,BAI Long,et al.Simulation on Flow Field Characteristics of Deflector Jet Servo Valve Pre-stage Under Different Turbulence Models [J].Journal of Beijing Jiaotong University,2018,42(3):127-133,140.
[8] 张雨.偏导射流伺服阀前置级流场仿真与试验研究[D].北京:北京交通大学,2018.ZHANG Yu.Flow Distribution Simulation and Experiment Study of the Jet Deflector Servo Valve’s Pre-stage[D].Beijing:Beijing Jiaotong University,2018.
[9] 蒋大伟,许明理.基于Fluent的偏转板射流伺服阀的前置级仿真[J].液压与气动,2016,(4):48-53.JIANG Dawei,XU Mingli.Simulation Based on Fluent for Pre-stage of Deflector Jet Servo Valve [J].Chinese Hydraulics & Pneumatics,2016,(4):48-53.
[10] 蒋大伟.偏转板射流伺服阀的前置级流场仿真与动态特性研究[D].镇江:江苏大学,2016.JIANG Dawei.Pre-stage Flow Field Simulation and Dynamic Characteristics of Deflector Jet Servo Valve [D].Zhenjiang:Jiangsu University,2016.
[11] 刘增光,杨国来,岳大灵,等.进出油阻尼孔对偏转板射流阀射流流场的影响[J].机床与液压,2017,45(5):133-138.LIU Zengguang,YANG Guolai,YUE Daling,et al.Influence of the Orifice on the Jet Flow Field of Deflector Jet Valve[J].Machine Tool & Hydraulics,2017,45(5):133-138.
[12] 刘增光,岳大灵,杨桢毅,等.喷嘴宽度对偏转板射流阀射流效率影响的仿真分析[J].液压与气动,2016,(10):27-32.LIU Zengguang,YUE Daling,YANG Zhenyi,et al.Simulation Analysis of the Influence of Nozzle Width on the Jet Efficiency of Deflector Jet Valve [J].Chinese Hydraulics & Pneumatics,2016,(10):27-32.
[13] 訚耀保,张鹏,岑斌.偏转板射流伺服阀前置级流场分析[J].中国工程机械学报,2015,13(1):1-7.YIN Yaobao,ZHANG Peng,CEN Bin.Pre-stage Flow Field Analysis on Deflector Jet Servo Valves [J].Chinese Journal of Construction Machinery,2015,13(1):1-7.