A twin-screw compressor rotor tooth profile

Abstract

The invention discloses a tooth profile of a double-screw compressor rotor. Tooth profile bodies of the end face of a female rotor body and tooth profile bodies of the end face of a male rotor body are each formed by smoothly connecting seven quadratic curves end to end. A tooth curve of the end face of the female rotor body comprises arcs, a parabola and arc envelope lines. A tooth curve of the end face of the male rotor body comprises arcs, a parabola envelope line and arc envelope lines. The seven quadratic curves of teeth of the female rotor body include the arc A2B2, the arc B2C2, the arc envelope line C2D2, the parabola envelope line D2E2, the pin tooth arc E2F2, the arc envelope line F2G2 and the arc G2H2, wherein the arc A2B2, the arc B2C2, the arc envelope line C2D2, the parabola envelope line D2E2, the pin tooth arc E2F2, the arc envelope line F2G2 and the arc G2H2 are sequentially and smoothly connected. The seven quadratic curves of teeth of the male rotor body include the arc A1B1, the arc envelope line B1C1, the arc C1D1, the parabola D1E1, the pin tooth arc E1F1, the arc F1G1 and the arc envelope line G1H1, wherein the arc A1B1, the arc envelope line B1C1, the arc C1D1, the parabola D1E1, the pin tooth arc E1F1, the arc F1G1 and the arc envelope line G1H1 are sequentially and smoothly connected. The tooth profile has the beneficial effects that the area utilization coefficient of the tooth profile is large, and the sealing performance is good.

Description

technical field [0001] The invention relates to a tooth profile of a twin-screw compressor rotor. Background technique [0002] Screw compressor is a volumetric rotary machine that has been developed rapidly in the past two decades. It uses a pair of female and male rotors in the casing to transmit fluid through the helical meshing movement. The change of the fluid compresses and expands to complete the increase and decrease of pressure. Since the screw compressor is a rotary machine, it has the advantages of both the rotary type and the volumetric type, and is widely used in industry. The main reason for the rapid development of screw compressors is the result of the development of tooth profiles. Since the screw compressor relies on the meshing line to achieve the seal between the rotors, reducing the area of ​​the leakage triangle, shortening the length of the contact line, and minimizing leakage have become the key to improving the efficiency of the compressor. In add...

AI Technical Summary

Problems solved by technology

However, the tooth curves composed of traditional profiles generally have points and straight lines, which are not convenient for processing, and may easily lead to rapid wear of the tooth surface, and the tool leakage at the straight line is large, and affects the detection and processing of the rotor.

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