冲蚀对射流管伺服阀前置级工作特性的影响  

Influence of Erosion on Working Characteristics of Pre-stage of Jet Pipe Servo Valve

作　　者：孟令康 朱玉川[1] 丁建军 林文 陆军 俞晓冰 MENG Ling-kang;ZHU Yu-chuan;DING Jian-jun;LIN Wen;LU Jun;YU Xiao-bing(College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016;No.704 Research Institute, China State Shipbuilding Corporation Limited, Shanghai 200031)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]中国船舶集团有限公司第七〇四研究所,上海200031

出　　处：《液压与气动》2022年第6期101-106,共6页Chinese Hydraulics & Pneumatics

基　　金：江苏省研究生科研与实践创新计划项目(SJCX20_0066);中国船舶集团公司704研究所发展基金项目(20Z290-361)。

摘　　要：以射流管伺服阀的前置级为研究对象,分析冲蚀对前置级工作特性的影响。基于Fluent有限元仿真软件,建立前置级可视化冲蚀模型,仿真得到前置级的冲蚀部位与冲蚀量,并将仿真结果与前置级冲蚀实物进行对比分析。根据前置级冲蚀实物的结构形状,建立冲蚀后的前置级三维模型,利用数值计算的方法研究前置级的冲蚀对其工作特性的影响。结果表明:前置级冲蚀最严重的部位是劈尖,劈尖的冲蚀率随喷嘴位移的增大逐渐减小,仿真结果与前置级冲蚀实物相一致;前置级的冲蚀会导致前置级的左右接收孔压差和流量减小。研究对射流管伺服阀前置级冲蚀部位的预测和故障诊断具有指导作用。The effect of erosion on working characteristics of pre-stage of jet pipe servo valve which is the research object is analyzed.On the basis of Fluent finite element simulation software,a visual erosion simulation model of the pre-stage is established to obtain the erosion position and quantity of pre-stage,and the simulation results are compared with pre-stage erosion object.According to pre-stage erosion object,the structural design of pre-stage 3D model after erosion is carried out.Then the influence of pre-stage erosion on the working characteristics of pre-stage is studied by numerical simulation.The results show that the erosion of pre-stage wedge is the most serious,and the erosion rate of pre-stage wedge can decrease gradually with the increase of nozzle displacement.The simulation results of pre-stage erosion are consistent with pre-stage erosion object.After pre-stage erosion,the differential pressure and flow of left and right receiving holes in pre-stage decrease.This study has a guiding role in the erosion prediction and fault diagnosis of the pre-stage of jet pipe servo valve.

关 键 词：射流管伺服阀 前置级 劈尖 冲蚀 工作特性 

分 类 号：TH137[机械工程—机械制造及自动化]