双螺杆真空泵新型椭圆弧修正正弦螺旋线螺杆转子设计与模拟  

Design and Simulation of a Novel Elliptical Arc Modified Sinusoidal Helical Screw Rotor for Twin-Screw Vacuum Pumps

作　　者：李腾[1] 赵玺皓 王君[1] 魏蜀红 陈昶润 LI Teng;ZHAO Xihao;WANG Jun;WEI Shuhong;CHEN Changrun(China University of Petroleum(East China),College of New Energy,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)新能源学院,青岛266580

出　　处：《真空科学与技术学报》2023年第10期841-847,共7页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金项目(52176029);青岛市科技惠民示范专项(23-2-8-cspz-6-nsh)。

摘　　要：螺杆转子的几何性能直接决定双螺杆真空泵的工作性能。针对现有的螺杆转子存在空间接触线长,泄漏三角形面积大的问题,建立正弦螺旋线和椭圆弧及其共轭曲线的啮合模型,设计了一种新型正弦螺旋线-椭圆弧转子,并推导了其型线方程;通过对螺杆转子几何特性的分析和工作过程的数值模拟,比较了传统螺杆转子和新型转子的不同。结果表明:所提出的新型转子接触线长度缩短了2.54%,泄漏三角形面积减小了27.77%,且齿顶泄漏深度明显小于现有转子,具有更好的密封性能,显著提高了双螺杆真空泵的工作性能,对于改善双螺杆真空泵泄漏具有重要的理论意义和实际工程价值。The geometric properties of the screw rotor directly determine the working performance of the twinscrew vacuum pump.In order to solve the problem of long spatial contact curve and large leakage triangle area of the existing screw rotors,a meshing model of the sinusoidal helix,as well as the elliptic arc and their conjugate curves,is established in this study.A new screw rotor composed of a sinusoidal helix-elliptic arc is designed,and its profile equation is derived.The existing rotors and the new rotors are compared by means of geometric analysis of screw rotors and numerical simulation of their working process.The results show that the length of the spatial contact curve of the proposed screw rotor is shortened by 2.54%,and the leakage triangle area is reduced by 27.77%;the leakage depth of the tooth tip is significantly smaller than that of the existing rotor,which has better sealing performance and effectively improves the function of the twin-screw vacuum pump.It has important theoretical significance and practical engineering value for improving the leakage of the twin screw vacuum pump.

关 键 词：双螺杆真空泵 截面型线 正弦螺旋线 泄漏三角形 数值模拟 

分 类 号：TH36[机械工程—机械制造及自动化]