The Design of Structure Optimization on Twin-Screw Compressor Rotors Based on the Fluid Simulation

The level of designing the twin-screw compress or rotor profile in our country is relatively backward compared to foreign countries. The rotor is an important part of the screw compressor. This paper presents the new ideas based on arc-envelope to design the screw rotor. Taking the unilateral asymmetric cycloid-pins arc tooth profile as the research object, it designed a new type of rotor profile and built screw rotors with arc envelope tooth profile. It founded flow field simulation model of the original, and new twin-screw compressor rotor profile adopted the 3D software, simulated the distribution of its pressure and flow rate at operating speed with the software of Fluent. It predicted the rational of simulation results on the new designed rotor profile and provided a reference for the improvement of the new male and female twin-screw compressor rotors until getting the excellent performance rotors.