摘要
为定量分析高形转子在脉动品质和轻量化程度方面的优势。依序推导出包含基础形状系数和高形基础形状系数两变量下的流量脉动系数与单位排量体积的计算公式,并由高形点恰好避让对偶共轭轮廓的几何位置,推导出高形形状系数关于基础形状系数的计算公式,及构建最简洁的轻量化模型。结果表明:基础形状系数、叶顶半角和转子叶数是影响流量品质和轻量化的三大独立参数;高形泵较基础泵均有很大改善等。得出基于脉动品质的高形轻量化可归结为采用最小的许可叶顶半角、最大的许可脉动系数下的单位排量体积最小化的结论。
A novel algorithm was developed to quantitatively evaluate the minimized weight and maximized flow-pulsation coefficient of the Roots vacuum pump and/or blower with high-profile rotor.First,the analytical equations of the key variables,including the flow pulsation,volume utilization,volume per-unit displacement and high-profile shape coefficients,were rigorously derived.Next,the influence of the independent variables,such as the basic shape coefficient,lobe-number and half lobe-top angle,on the rotor profile was investigated;and finally,the minimal weight and maximal flow-pulsation coefficient were mathematically modeled.The calculated results show that the high-profile rotor outperforms the basic rotor.We suggest that the two variables may best evaluate the optimal weight & pulsation,including the narrowest allowable half lob-top angle and the smallest volume per-unit displacement,limited by the largest allowable flow pulsation coefficient.
作者
李玉龙
宋安然
范钧
刘萍
孙肖霞
潘海成
Li Yulong;Song Anran;Fan Jun;Liu Ping;Sun Xiaoxia;Pan Haicheng(School of Mechanical and Electrical Engineering,Suqian College,Suqian 223800,China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2020年第10期947-951,共5页
Chinese Journal of Vacuum Science and Technology
基金
宿迁市“千名领军人才集聚计划”项目
宿迁市科技计划项目(K201924)
宿迁学院高层次人才引进项目。
关键词
罗茨泵/马达
脉动品质
轻量化
基础形状系数
高形形状系数
叶顶半角
Roots pump and blower
Pulsating quality
Lightweight
Basic shape coefficient
High shape coefficient
Peak half angle
