罗茨转子具有节弦高内共轭段的高能轮廓构造  

High-performance construction of Roots rotor profile with chord height of pitch arc as inner conjugate profile segment

作　　者：刘萍[1] 李玉龙 张安民[1] 赵岩[1] LIU Ping;LI Yulong;ZHANG Anmin;ZHAO Yan(Suqian College,Suqian 223800,China)

机构地区：[1]宿迁学院,江苏宿迁223800 [2]宿迁学院机电工程学院,江苏宿迁223800

出　　处：《流体机械》2022年第2期43-48,共6页Fluid Machinery

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)(Z2020136);宿迁学院校级重点项目(2016KY09);宿迁学院创新团队项目(2021td07);宿迁学院高层次人才引进项目。

摘　　要：为实现容积充分利用和更小内泄漏的罗茨泵轻量化目的,创新提出内共轭轮廓采用节弦高的普通型和高形型两类转子,并依据单一转子上各轮廓间的双对称几何关系,构建出创新转子的全共轭轮廓方程和容积利用系数式。结果表明:普通型创新转子比现有转子具有更大的容积利用系数,高形型将使之进一步最大化,3叶时分别提高了1.56%、13.21%,且转子加工相对简单;高形型的2~5个共轭点和平-凸共轭模式能使共轭泄漏最小化,径向等缝隙密封能使径向泄漏最小化等。得出高形型创新转子为一款具有更大容积利用和更小内泄漏的高能转子。In order to achieve lightweighting of Roots pumps with full utilization of rotor volume and smaller internal leakage,the ordinary-profile and tall-profile of Roots rotors with chord height of pitch arc as inner conjugate profile segment were firstly proposed innovatively;from geometric relations of double symmetry between each profile segment on a single rotor,full conjugate profile equation of innovative rotor was constructed,and following calculation formula of volume utilization factor was derived.The results show that the innovative rotor with ordinary-profile has a higher volume utilization factor than all existing rotors,which would be further maximized by its tall-profile,and is increased by 1.56%and 13.21%respectively under 3 lobes,at the same time,the innovative rotor processing is relatively simple;plane-convex conjugate advantage and 2~5 conjugate points of the innovative rotor with tall-profile can minimize conjugate leakage,and radial equal gap can minimize radial leakage,etc.It is concluded that the innovative rotor with tall-profile is a high-performance rotor with full utilization of rotor volume and smaller internal leakage.

关 键 词：罗茨转子 半叶节弦高 形状系数 容积利用系数 高形转子 双对称构造方法 

分 类 号：TH325[机械工程—机械制造及自动化] TB752.26[一般工业技术—真空技术]