Double-screw bilateral asymmetric rotor profile composed of nine tooth curves

Abstract

The invention discloses a twin-screw bilateral asymmetric rotor molded line composed of nine tooth curves, which comprises a pair of female rotor and male rotor which are always parallel and mutually engaged, the end face molded lines of the female rotor and the male rotor are conjugate curves, the male rotor comprises three male rotor teeth which are centrosymmetric, and the male rotor comprises three male rotor teeth which are centrosymmetric. The female rotor comprises five female rotor teeth which are centrosymmetric, the tooth types of the female rotor teeth are the same and are circumferentially and uniformly distributed, the tooth type contour line of each male rotor tooth comprises nine sections of male tooth curves which are smoothly connected end to end, the female rotor comprises five female rotor teeth which are centrosymmetric, and the tooth types of the female rotor teeth are the same and are circumferentially and uniformly distributed; and the contour line between the tooth types of each female rotor tooth comprises nine female tooth curves which are smoothly connected end to end. According to the invention, rotor meshing and rotor inter-tooth volume optimal sealing performance can be met, formation of a hydrodynamic force lubricating gas film between the double screws is facilitated, transverse leakage passing through a contact line is reduced, the sealing effect can be obviously improved, tooth surface wear is reduced, and the efficiency of the compressor is improved.

Description

technical field [0001] The invention belongs to the field of compressor components, in particular to the technical field of compressor and vacuum pump rotors, in particular to a twin-screw double-sided asymmetrical rotor profile composed of nine-segment tooth curves. Background technique [0002] According to the operation mode, screw compressors can be divided into oil-free screw compressors and oil-injected screw compressors. Oil-free means that the gas does not come into contact with lubricating oil during compression. This kind of compressor does not directly contact the two screws during operation. , but the male screw drives the female screw to rotate through the synchronous gear. The synchronous gear not only transmits power, but also keeps the gap between the two rotors. The working principle of the screw compressor can be divided into three processes: suction, compression and exhaust. The rotor rotates, and each pair of intermeshing teeth completes the same working ...

AI Technical Summary

Problems solved by technology

In order to ensure the performance of the twin-screw compressor, the screw profile should not only meet the meshing principle, not only ensure the continuous and stable operation of the rotor, but also meet the following basic requirements: it has a sufficiently large inter-tooth volume of the rotor, and its elementary volume gas Good tightness, high efficiency, stable transmission characteristics of the rotor, good thermal deformation performance, good processing performance with sufficient strength and rigidity, and one of the factors that cause leakage between the interdental volumes of oil-free twin-screw compressors One is the leakage triangle during the operation of the rotor. Generally, the leakage triangle of the symmetrical profile is 10 times that of the asymmetrical profile. Therefore, compared with the asymmetrical profile, the symmetrical profile has a large pressure difference between the volumes of the elements and a small area utilization rate. , poor sealing effect, large leakage and noise, etc., which reduces the efficiency of the compressor, and the rotor volume of the symmetrical profile is larger than that of the asymmetrical profile, which increases the manufacturing cost and layout space

Images