A space-meshing conical twin-screw compressor rotor and compressor with variable pitch

Abstract

A space-intermeshing conical twin-screw compressor rotor with variable pitch and the compressor. The twin-screw compressor rotor includes an inner rotor and an outer rotor that mesh with each other. , the profile of the outer rotor is the conjugate curve of the short epicycloid in space, and the profiles of the inner and outer rotors are spirally scanned by the profiles of the inner and outer rotors in a variable pitch manner; with the rotation of the inner and outer rotors, the volume of the element changes from large The end gradually decreases toward the small end, and the compressed fluid is sucked in from the large end and discharged from the small end. The invention uses the inner equidistant line of the short epicycloid in space as the basic shape line of the rotor structure, so that the rotor can simultaneously meet the requirements of variable pitch, internal meshing and conical shape. The internally engaged screw can greatly reduce the center distance, and can form a complete closed volume without a casing, which reduces the length of the contact line and can effectively reduce leakage. The invention has the advantages of high space utilization rate, simple structure, low noise, high pressure ratio and the like.

Description

technical field [0001] The invention belongs to the design field of compressor rotors, and in particular relates to a conical twin-screw compressor rotor and a compressor with variable pitch space meshing. Background technique [0002] Twin-screw compressor is a positive displacement rotary compressor used to obtain high-pressure gas and has a wide range of applications in modern industry. It inherits many advantages such as long service life, reliable operation, low vibration, low noise, stable operation and no surge phenomenon of rotary machinery. At the same time, it has the characteristics of no wearing parts such as air valves, forced suction and exhaust, and simple processing. The core component in the supply, refrigeration, waste heat recovery and other systems. [0003] At present, in order to facilitate processing, the commonly used twin-screw compressor rotor meshing relationship is external meshing, which leads to a larger center distance between the rotors and a...

AI Technical Summary

Problems solved by technology

The current difficulty is that there are not many profiled lines that meet these technical requirements, and it is also difficult to solve the spatial meshing. It is necessary to find a relatively simple profiled line with excellent performance to meet the requirements of variable pitch, internal meshing and taper at the same time.

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