Tooth profile of a twin-screw machine rotor

Abstract

The invention discloses a tooth profile of the rotor of a twin-screw machine. The twin-screw machine includes a female rotor and a male rotor. Symmetrical; the shape of each tooth type on the end face of the male rotor is symmetrical with respect to the line AO1 between the apex A of the addendum and the center O1 of the male rotor; half of the tooth curves of each tooth type on the end face of the female rotor and the end face of the male rotor are composed of five sections The curves are smoothly connected from the beginning to the end, wherein: half of the tooth curves of each tooth type on the end face of the female rotor and the end face of the male rotor include points, arc lines, involutes and cycloids. After adopting the above technical solution, the present invention can obtain a larger utilization factor of tooth profile area, making it suitable for gas compression with small pressure difference and large flow rate, and easy to process.

Description

technical field [0001] The invention relates to the end face tooth profile of a twin-screw machine rotor. Background technique [0002] At present, in the field of small pressure difference and large flow gas compression technology, the relatively expensive centrifugal compressors with large displacement, high speed, low unipolar pressure ratio and relatively small and medium displacement, low pressure ratio, poor efficiency but cheap cost are mainly used. The Roots compressor has not yet developed the rotor tooth profile of the screw compressor that can adapt to the gas boosting of the large displacement and low pressure ratio. In addition, the tooth curves of traditional rotors generally have straight lines, etc., which are not easy to process, and easily lead to rapid wear of the tooth surfaces, and the tool leakage at the straight lines is large, which affects the detection and processing of the rotor. Contents of the invention [0003] The technical problem to be sol...

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Problems solved by technology

[0002] At present, in the field of small pressure difference and large flow gas compression technology, the relatively expensive centrifugal compressors with large displacement, high speed, low unipolar pressure ratio and relatively small and medium displacement, low pressure ratio, poor efficiency but cheap cost are mainly used. Roots-type compressor, the rotor tooth shape of the screw compressor that can adapt to the gas boosting of the large displacement and low pressure ratio has not been developed

In addition, the tooth curves of traditional rotors generally have straight lines, etc., which are not easy to process, and it is easy to cause rapid wear of the tooth surface, and the tool leakage at the straight lines is large, which affects the detection and processing of the rotor.

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