摘要
为实现罗茨泵圆弧转子的低周向泄漏、无闭气现象、造型参数化和尺寸最优化。从7个方面构建出第1、2两类新型线的参数化方程;后以节圆半径和周向弧半角为设计变量,转子副所占方体空间的轻量化为目标函数,构建优化模型;最终就闭气现象,给出谷部型线段上的新避让型线。结果表明:新型线的主圆弧圆心为不位于峰轴上的偏心圆弧;新型线的低周向泄漏是以降低最大形状系数和增加泵体积为代价的,叶数越多、周向弧半角越大,牺牲越大,应优选2叶第1类新转子;谷部的新避让圆弧能有效消除闭气现象,且简化加工等。为泵其它型线的低周向泄漏,提供一种全参数设计与造型方法。
We addressed the problems of circumferential leakage and trapped-gas of Roots vacuum pump. The total solutions included: first,two new types of arc-rotor were developed and mathematically modeled;next,their profiles and parametric equations were analytically derived;and finally,their geometries were parameterized and optimized. The operation of exemplified Roots pump with the two novel types of arc-rotor was theoretically analyzed.The calculated results show that the novel arc-rotors all significantly outperform the conventional one,because of smaller circumferential leakage,complete removal of trapped-gas,easier machining and lower fabrication cost. We suggest that the newly-developed arc-rotors may be of much technological interest in fabrication of Roots vacuum pump.
作者
李玉龙
孙付春
冉光泽
Li Yulong;Sun Fuchun;Ran Guangze(School of Mechanical and Electrical Engineering,Suqian College,Suqian 223800,China;College of Industrial Engineering,Chengdu University,Chengdu 610106,China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2019年第1期39-45,共7页
Chinese Journal of Vacuum Science and Technology
基金
四川省自然科学重点资助项目(16ZA0382)
北京卫星制造厂资助项目(20804)
关键词
罗茨泵
圆弧转子
新型线
周向泄漏
闭气现象
Roots pump
Arc rotor
New profiles
Circumferential leakage
Trapped-gas phenomenon
