多喷嘴挡板液压放大器流场仿真与特性影响因素分析  

Flow Field Simulation and Characteristic Influencing Factors Analysis of Multi-nozzle Baffle Hydraulic Amplifier

作　　者：葛声宏 王彦文 杨瀚浩 张鑫宇 朱玉川[1] GE Shenghong;WANG Yanwen;YANG Hanhao;ZHANG Xinyu;ZHU Yuchuan(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China;AVIC Nanjing Servo Control System Co.,Ltd.,Nanjing Jiangsu 210032,China)

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

出　　处：《机床与液压》2025年第1期109-115,共7页Machine Tool & Hydraulics

摘　　要：多喷嘴挡板单级电液伺服阀是飞机辅助动力装置中的燃油计量部件,其由力矩马达和液压放大器组成,液压放大器采用单侧四喷嘴结构形式,喷嘴的结构参数对液压放大器性能有重要影响。利用Fluent流场仿真,研究喷嘴径向、轴向尺寸及分布方式对液压放大器性能的影响。结果表明:径向尺寸中影响程度最大的是喷嘴内径,轴向尺寸中影响程度最大的是喷嘴伸出量,分布方式中影响程度最大的是喷嘴数量。其中,增大喷嘴外径以及减小分布圆直径,均可增大喷嘴总流量并减小挡板受力;当喷嘴外径增大23.4%、分布圆直径减小37.1%时,喷嘴总流量分别增加8%和5.5%,挡板受力分别下降9%和6.6%。Multi-nozzle baffle single-stage electro-hydraulic servo valve is a fuel metering component in aircraft auxiliary power unit,which is composed of torque motor and hydraulic amplifier.The hydraulic amplifier adopts a single-sided four-nozzle structure.The structure parameters of nozzle have important influence on the performance of hydraulic amplifier.The influence of nozzle radial size,axial size and distribution mode on the performance of hydraulic amplifier was studied by using Fluent flow field simulation.The results show that inner diameter of nozzle is the most important factor in radial dimension,the extension of nozzle is the most important factor in axial dimension,and the number of nozzle is the most important factor in distribution mode.The total flow rate of nozzle can be increased and the force of baffle can be reduced by increasing the outside diameter of nozzle and decreasing the diameter of distribution circle.When the outer diameter of the nozzle increases by 23.4%and the diameter of distribution circle decreases by 37.1%,the total flow rate of the nozzle increases by 8%and 5.5%,and the force of the baffle decreases by 9%and 6.6%,respectively.

关 键 词：液压放大器 多喷嘴挡板 电液伺服阀 

分 类 号：TH137.532[机械工程—机械制造及自动化]