考虑二次射流速度分布的偏转板电液伺服阀前置级压力特性研究  

Study on Pre-stage Pressure Characteristics of Deflector Electro-hydraulic Servo Valve Considering Velocity Distribution of Secondary Jet

作　　者：程文豪 葛声宏 杨瀚浩 林文 朱玉川[1] CHENG Wenhao;GE Shenghong;YANG Hanhao;LIN Wen;ZHU Yuchuan(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;AVIC Nanjing Servo Control System Co.,Ltd.,Nanjing 210032,China)

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]中航工业南京伺服控制系统有限公司,南京210032

出　　处：《机械科学与技术》2025年第4期724-729,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51975275);江苏省重点研发计划(BE2021034);南京航空航天大学研究生科研与实践创新项目(xcxjh20210502)。

摘　　要：针对偏转板电液伺服阀前置级传统数学建模认为二次射流出口速度服从均匀分布的不足,提出二次射流出口速度满足高斯分布。基于平面自由紊动射流理论与液体活塞模型,建立了偏转板电液伺服阀前置级压力特性数学模型。通过有限元仿真和断载压力特性试验表明:相较于传统模型,偏转板位移越大,该模型求解精度越高;当偏转板位移0.05 mm,求解精度相较传统模型提高了约17%,为偏转板电液伺服阀精确建模与性能分析奠定了基础。Aiming at the shortcomings of traditional mathematical modeling of the pre-stage of the deflector electro-hydraulic servo valve that the outlet velocity on the secondary jet stage obeyed the uniform distribution,the outlet velocity of the secondary jet was proposed to meet the Gaussian distribution.Based on the theory of plane free turbulent jet and liquid piston model,the mathematical model describing the pre-stage pressure characteristics of deflector electro-hydraulic servo valve is established.The simulation and the pressure characteristic test show that compared with the traditional model,the larger the deflector displacement,the more accurate the proposed model.When the deflector plate displacement is 0.05 mm,the accuracy of the proposed model is improved by about 17%compared with the traditional model,which lays a foundation for the accurate modeling and performance analysis of the deflector electro-hydraulic servo valve.

关 键 词：偏转板电液伺服阀 前置级 二次射流 压力特性 

分 类 号：TG156[金属学及工艺—热处理]