Three-section type double-screw compressor rotor and design method of molded line thereof

Abstract

The invention belongs to the technical field of double-screw compressors, and particularly relates to a three-section double-screw compressor rotor. The three-section double-screw compressor rotor comprises a male rotor and a female rotor, and is characterized in that the end face molded line of the male rotor consists of multiple sections of curves including a polynomial curve envelope line ab, an arc bc and an arc envelope line cd which are in smooth transition connection in sequence, and the end face molded line of the female rotor consists of multiple sections of curves including a polynomial curve AB, an arc envelop line BC and an arc CD which are sequentially connected. According to the formed molded line of the double-screw compressor rotor, the female rotor and the male rotor are completely meshed, the molded lines of the female rotor and the male rotor are each composed of only three sections of curves, and the molded lines are simple in constitution and easy to design and modify; and the molded lines both adopt the arcs, the polynomial curves and the conjugate envelope lines of the arcs and the polynomial curves, and then line seal of the tooth surface of the rotor is improved to band seal.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a three-stage twin-screw compressor rotor and a design method thereof. Background technique [0002] Twin-screw compressors have the advantages of high reliability, convenient operation and maintenance, good power balance, strong adaptability and multi-phase mixed transmission. They are widely used in mining, chemical industry, power, food, medicine, and refrigeration and other fields. [0003] As the core technology of the twin-screw compressor, the rotor profile determines the performance of the twin-screw compressor and is the key technology for the design and optimization of the twin-screw compressor. With the development of science and technology, among the rotor profiles that have been disclosed so far, The rotor profile has undergone three generations of development: the first generation of rotor profile has a simple design of symmetrical circular arc rotor profile, but t...

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Problems solved by technology

[0003] As the core technology of the twin-screw compressor, the rotor profile determines the performance of the twin-screw compressor and is the key technology for the design and optimization of the twin-screw compressor. With the development of science and technology, among the rotor profiles that have been disclosed so far, The rotor profile has undergone three generations of development: the first generation of rotor profile has a simple design of symmetrical circular arc rotor profile, but the leakage triangular area is large; the second generation of asymmetrical rotor profile uses points, straight lines and cycloids, etc. profile, which reduces the leakage triangle, but is sensitive to the formation point of the cycloid, and the sealing effect of the formed "line" is poor; the asymmetrical rotor profile in the third and latest generation adopts arc, ellipse and parabola Isometric curves, improving the "line" seal to "belt" seal, which obviously improves the sealing effect, but this kind of design is generally realized by "splicing" multiple curves. There are many types of curves and the design is difficult.

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