提高附壁效应真空发生器最大真空度的研究  

Research on Improving the Maximum Vacuum of Coanda Effect Vacuum Ejector

作　　者：李建鑫 李小宁[1] LI Jianxin;LI Xiaoning(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《机械制造与自动化》2023年第3期50-53,共4页Machine Building & Automation

摘　　要：为提高附壁效应真空发生器的最大真空度,设计一种偏转射流入射角度的新型斜射式附壁效应真空发生器。通过仿真与试验研究射流偏转角θ及射流缝隙宽度h对真空度的影响规律。结果表明:随着射流偏转角θ和射流缝隙宽度h由小变大,真空发生器真空度均呈先增大后减小的变化趋势;当射流偏转角θ=30°、射流缝隙宽度h=0.16 mm时,真空度最大;在供气压力为0.5 MPa时,斜射式附壁效应真空发生器的最大真空度为63.8 kPa,相较于目前的附壁效应真空发生器最大真空度52 kPa提高了约23%。To improve the maximum vacuum of the Coanda effect vacuum ejector,a new type of Coanda effect vacuum ejector of deflected jet angle was designed.The effects of jet deflection angleθand jet gap width h on vacuum degree are studied through simulations and experiments.The results show that as the jet deflection angleθand the jet gap width h increase from small to large,the vacuum degree of the vacuum generator first increases and then decreases;when the jet deflection angleθ=30°and the jet gap width h=0.16 mm,the vacuum is maximum;when the air supply pressure is 0.5 MPa,the maximum vacuum of the ejector is 63.8 kPa,which is about 23%higher than 52 kPa of the Coanda effect vacuum ejector.

关 键 词：真空发生器 附壁效应 真空度 结构 

分 类 号：TH138[机械工程—机械制造及自动化]