Design of a novel intersecting-axis meshing Quimby-tooth dry screw vacuum pump

A novel intersecting-axis meshing Quimby-tooth dry screw vacuum pump was proposed in this paper. The mathematical model for generating the geometric structure of intersecting-axis meshing Quimby-tooth screw rotors is established, alongside a geometric characteristic calculation model for this novel screw structure. Two basic design methods for the intersecting-axis meshing Quimby-tooth screw structure are proposed, and their geometric characteristics are analyzed by comparing them with conventional parallel-axis meshing screw rotors, thus revealing the technical potential of this new technology. The proposed geometry generation model is verified by fabricating a prototype of the intersecting-axis meshing screw vacuum pump via 3D printing, while the geometric characteristic analysis model is validated using commercial software. Research results show that intersecting-axis meshing technology can reduce rotor volume by 24 %, leakage channel length by 32 %, and gear meshing velocity by 44.5 %. This study provides fundamental references and insights for the development of next-generation dry screw vacuum pumps, further advancing progress in vacuum acquisition fields.