Novel tooth form of screw rod rotor of double-screw compressor

Abstract

The invention discloses a novel screw rotor tooth shape of a twin screw compressor. The novel screw rotor tooth shape comprises a male rotor tooth shape and a female tooth shape, and is characterized in that each tooth shape on the end surface of the male rotor and the female rotor consists of six segments of curves in smooth connection, and the curves comprise an ellipse arc, a circular arc and an enveloping line thereof, wherein the six segments of curves of each tooth of the female rotor comprise: a tooth curve ellipse arc a2b2, a tooth curve circular arc b2c2, a tooth curve arc c2d 2, a tooth curve circular arc enveloping line d2e2, a tooth curve circular arc e2f2 and a tooth curve circular arc f2g2, wherein the curves of each tooth are connected in sequence. The six segments of curves of each tooth of the male rotor comprise a tooth curve ellipse arc enveloping line a1b1, a tooth curve circular arc enveloping line b1c1, a tooth curve pin tooth circular arc c1d1, a tooth curve circular arc d1e1, a tooth curve circular arc enveloping line e1f1and a tooth curve circular arc f1g1; and the curves of each tooth are connected in sequence. Therefore, when the tooth surfaces are in conjugate meshing, the tooth surfaces of two rotors are improved to 'belt' sealing from 'line' sealing, so as to improve the sealing effect obviously, contribute to forming a lubricating oil film and reducing tooth surface abrasion, and prolong the rotor life greatly.

Description

technical field [0001] The invention relates to a screw compressor, in particular to a new tooth profile of a screw rotor of a twin-screw compressor in the screw compressor. Background technique [0002] The development of screw rotor tooth shape is the main driving force for the development of screw compressors. With the continuous development of new technologies and the continuous improvement of processing technology, the tooth profile of the screw rotor has been continuously updated and developed. The main purpose of the study on the profile of the screw rotor is to increase the efficiency and improve the performance of the screw compressor. Each tooth profile on the rotor end face is generally connected end to end by multiple tooth curves. Commonly used tooth lines are: point, straight line, cycloid, arc, ellipse, involute and parabola. In order to avoid sharp points appearing in the profile due to the design of points and straight lines in the tooth curve, which will...

AI Technical Summary

Problems solved by technology

In order to avoid sharp points appearing in the profile due to the design of points and straight lines in the tooth curve, which will cause large airflow disturbance and high noise, most of the current rotor tooth profile designs adopt cycloid, arc, Ellipse, involute and parabola etc. are used as its constituent tooth curves, such as the patent application whose application number is 200610045910.7 and the title of the invention is "a twin-screw compressor screw rotor tooth shape", although it mentions that it can overcome the tooth curve of the constituent teeth. Points and straight lines formed by sharp points, but because it still uses a cycloid, it will cause the track of the meshing line to be not smooth enough, which will cause the rotor to be prone to impact, noise and vibration during operation, and the rotor is easy to wear, etc. question

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