Rotor end face tooth profile of high-temperature-resistant double-screw machine

Abstract

According to the rotor end face tooth profile of the high-temperature-resistant double-screw machine, the outer circle diameter of a female rotor is smaller than the pitch circle diameter of the female rotor, and rack profiles of the end face tooth profiles of the female rotor and the male rotor are formed by smoothly connecting seven sections of curves end to end. The tooth curve of each tooth type of the end face of the female rotor comprises a curve segment A2B2, an arc segment B2C2, a curve segment C2D2, a curve segment D2E2, a curve segment E2F2, an arc segment F2G2 and an arc segment G2H2 which are connected in sequence. The tooth curve of each tooth type of the end face of the male rotor comprises a curve segment A1B1, a curve segment B1C1, a curve segment C1D1, an arc segment D1E1, a curve segment E1F1, a curve segment F1G1 and an arc segment G1H1. A small gap is reserved between the female rotor and the male rotor adopting the rotor end face tooth profile, when the expansion allowance reaches the critical value at the high temperature, the collision position is small, jamming is avoided, a section of small gap can be formed in a running-in mode, and the tooth profile is not provided with cross points and is smoother.

Description

technical field [0001] The invention relates to the tooth profile of the rotor end face of a twin-screw machine. Background technique [0002] Twin-screw machines include twin-screw compressors, twin-screw expanders, etc. The rotors of twin-screw machines operate at different temperatures, and there will be different degrees of thermal deformation. Therefore, it is necessary to reserve expansion allowance in advance when designing the rotor clearance. In addition, in twin-screw machines, the Yin and Yang rotors mesh with each other to form a volume change between the teeth to achieve compression or expansion. If the rotor clearance is designed to be too small, when the temperature rises to the critical value of insufficient expansion allowance, the Yin and Yang , There will be friction between the male rotors. When the temperature rises further, the rotors may be seized and cannot continue to rotate. And if the design of the rotor gap is too large, the gap between the rotor...

AI Technical Summary

Problems solved by technology

In addition, in twin-screw machines, the Yin and Yang rotors mesh with each other to form a volume change between the teeth to achieve compression or expansion. If the rotor clearance is designed to be too small, when the temperature rises to the critical value of insufficient expansion allowance, the Yin and Yang , There will be friction between the male rotors. When the temperature rises further, the rotors may be seized and cannot continue to rotate.

And if the design of the rotor clearance is too large, the gap between the rotors is too large, it will increase the leakage inside the machine and reduce the working efficiency of the machine

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