罗茨真空泵圆弧型转子型线设计及加工

Design and Machining of Circular Rotor Profiles for Roots Vacuum Pumps

罗茨泵转子型线的研究是罗茨泵设计的核心部分,圆弧型转子型线为广泛应用的罗茨泵转子型线之一。圆弧转子型线的设计中,首先实现转子理论型线的设计,然后基于理论型线,设计转子的实际型线和铸造毛坯型线。本文在实际型线和铸件毛坯型线的设计过程中,提出基于共轭特性的圆弧线实际型线和铸件毛坯型线设计方法,大幅简化了分析设计过程,并以此为基础,设计了70L/s罗茨泵圆弧转子型线及其粗加工和精加工方法。

Study of the rotor profile of Roots pump is a core part of Roots pump design,and the circular arc rotor profile is one of the widely used for Roots pump.In the design of circular rotor profile,the theoretical rotor profile is designed based on conjugate properties firstly.Then the actual profile and casting blank profile of the rotor are obtained based on the theoretical profile.In this paper,the actual profile and casting blank profile design method based on the rotor circular arc line is proposed on conjugate properties to greatly simplify the analysis and design process.Finally,the circular arc rotor profile and its rough machining and finishing methods are designed for a 70L/s Roots pump.