Screw rotor group and hydrogen circulation pump with the screw rotor group

Abstract

The invention discloses a screw rotor set and a hydrogen circulation pump, which include a driving rotor and a driven rotor, the driving rotor and the driven rotor are meshed with each other; the driven rotor profile includes a straight line A 1 B 1 , the first transition arc B 1 C 1 , point meshing cycloid C 1 D. 1 , transition curve conjugate line D 1 E. 1 and the second transition arc E 1 f 1 ; The profile of the active rotor includes a linear conjugate envelope A 2 B 2 , the first transition arc conjugate envelope B 2 C 2 , point meshing cycloid C 2 D. 2 , transition curve D 2 E. 2 and the second transition arc conjugate envelope E 2 f 2 ; The profiled lines of the driven rotor and the profiled lines of the active rotor are both centrosymmetric. The screw rotor group has a simple structure and is convenient to process, and by optimizing the curve connecting the dedendum circle and the pitch circle, the utilization factor of the rotor area can be increased, and the volumetric efficiency can be increased. The use of the twin-screw hydrogen circulation pump with the rotor has better air tightness and volumetric efficiency.

Description

technical field [0001] The invention belongs to the field of mechanical engineering design, and more specifically relates to a screw rotor group and a hydrogen circulation pump with the screw rotor group. Background technique [0002] The twin-screw hydrogen circulation pump is an oil-free rotary machine used in hydrogen fuel cells. It inherits the advantages of the twin-screw machine, such as simple and compact structure, stable operation, low mechanical vibration and noise, and easy maintenance. With the increasing demand for energy and deteriorating environmental problems, hydrogen energy has been developed and popularized as a new energy source, and is applied to industrial fields such as airplanes, trains, and automobiles. As an important component of electric vehicles, hydrogen circulation pumps continue to expand their share in the screw machinery market. [0003] The screw rotor group is the core component of the twin-screw hydrogen circulation pump. The screw roto...

AI Technical Summary

Problems solved by technology

The structure of the screw rotor group in the prior art is more complicated, the processing is more troublesome, and the cost is higher, and the utilization factor of the rotor area of ​​the screw rotor in the prior art is low, so that the air tightness and volumetric efficiency of the twin-screw hydrogen circulation pump are relatively poor

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