Combined Rotor Rack Generation for Twin Screw Vacuum Pump Rotor Profile Design

Abstract Rotor profile design is a critical factor influencing the efficiency and functionality of twin screw vacuum pumps. This paper delves into a specific aspect of rotor profile design using the rack generation method. The paper utilises an algorithm of rack generation tailored specifically to twin screw vacuum pump applications. The utilization of straight lines to form the rack ensures the generation of involute profiles on the rotors. Additionally, rack-generated rotors are typically easier to manufacture. Geometrical parameters, such as displacement and meshing line length across three rack generated rotor profiles are explored. Furthermore, chamber modelling is employed for the development of rotor profiles, augmenting the efficacy and reliability of the rack generation process. By focusing on rack generation, this paper offers valuable insights into rotor profile design, contributing to a deeper understanding of the methodologies driving innovation in twin screw vacuum pump technology.