椭圆弧凸转子的型线构造及进一步高形技术  

Profile Shaped-configuration of Convex Ellipse Rotor and Its Following High-shape Technology

作　　者：杨向莙 孙付春 Yang Xiangjun;Sun Fuchun(School of Mechanical Engineering,Chengdu University,Chengdu 610106,China)

机构地区：[1]成都大学机械工程学院

出　　处：《机械传动》2020年第1期163-167,共5页Journal of Mechanical Transmission

基　　金：四川省教育厅自然科学重点资助项目(16ZA0382);四川省粉末冶金工程技术研究中心开放基金课题项目(20804)

摘　　要：为提升罗茨泵的有效容积率,从高产与低漏两个角度,提出椭圆弧基础转子和高形转子的型线构建方法。基于椭圆方程和共轭原理及共轭临界条件,计算出椭圆弧的最佳轴长比和基础转子的最大形状系数;以从转子的顶角点恰好避开主转子的共轭工作段终点,计算出高形转子在给定顶圆角下的最大形状系数;并与特例的圆弧转子作高形方面的成果比较。结果表明,该椭圆弧基础转子和高形转子的型线构建方法在高产和防漏效果两方面都有显著提升,是解决罗茨泵椭圆弧的最佳轴长比和最大形状系数的根本性问题。For higher effective volume ratio of roots pump,from high output production and low innerleakage,the shaped-profile configuration of a ellipse basic rotor and its raised rotor of is constructed. Firstly,from ellipse coordinate equation of rotor shaped-profile and conjugate principle of rotor pairs and critical conju-gate conditions,the optimum axial length ratio of ellipse arc and the maximum shape coefficient of basic rotorare calculated. Secondly,based on the geometric relationship when the endpoint of valley working shaped-pro-file on driving rotor is just perfect to avoid the peak corner point on driven rotor,the maximum shape factor ofraised rotor under a given addendum angle is determined. Finally,all parameter coordinate equations of raisedshaped-profiles are provided,and the comparative advantage results of raised rotor to common circular arc rotoris focused on. All results show that the elliptical arc foundation rotor and high-profile rotor profile constructionmethod have significant improvement in both high yield and leakage prevention effects,and the fundamentalproblem of the optimal axial length ratio and maximum shape factor of the arcs arc of the Roots pump is solved.

关 键 词：罗茨泵 椭圆凸转子 型线构造 最佳轴长比 高形技术 

分 类 号：TH32[机械工程—机械制造及自动化]