Tooth profile of a twin-screw compressor rotor

Abstract

The invention discloses a tooth form of a twin-screw compressor rotor. The tooth form is characterized in that each tooth form of end faces of a female rotor and a male rotor is formed by smoothly connecting five sections of a quadratic curve, wherein a tooth curve of the end face of the female rotor comprises a circular arc line and an epicycloid; a tooth curve of the end face of the male rotor comprises a circular arc line, an epicycloid and a circular arc envelope curve. The five tooth curves of each tooth of the female rotor comprises a circular arc A2B2, a circular arc B2C2, a pin tooth circular arc C2D2, an epicycloid c D2E2 and a circular arc E2F2, which are smoothly connected; and the five tooth curves of each tooth of the male rotor comprises a circular arc A1B1, a circular arc B1C1, a pin tooth circular arc C1D1, an epicycloid D1E1 and a circular arc E1F1, which are smoothly connected. The tooth form of the twin-screw compressor rotor disclosed by the invention can ensure that rotors with the same size and rotation speed have a larger flow intertooth area coefficient and a relatively shorter contact line, thus the manufactured compressor has good axial sealing performance and high efficiency. The tooth form of the twin-screw compressor rotor disclosed by the invention is applicable to locations, such as process screw compressors with high differential pressure, mini-sized refrigeration compressors and the like.

Description

technical field [0001] The invention relates to the tooth profile of the end surface of the rotor which is conjugated in the cavity of the screw compressor, in particular to the tooth profile of the rotor of the twin-screw compressor. Background technique [0002] Screw compressor is an ordinary rotary volumetric equipment, which can operate at high speed under a relatively large pressure and flow range while maintaining high efficiency. The quality of the rotor profile is the main factor affecting the performance of the compressor. A better rotor profile should have a large space utilization factor between teeth, a short contact line and a small leakage triangle area. For rotors with the same size and rotating speed, the larger the utilization coefficient of the inter-tooth area, the shorter the contact line and the smaller the area of ​​the leakage triangle, the smaller the leakage, and the volumetric efficiency of the compressor can be improved by reducing the leakage whi...

AI Technical Summary

Problems solved by technology

However, the traditional design cannot guarantee that rotors with the same size and rotating speed have a large flow inter-tooth area coefficient and a relatively short contact line

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