Variable-pitch spacial internal meshing conical double-screw-rod compressor rotor and compressor

Abstract

The invention discloses a variable-pitch spacial internal meshing conical double-screw-rod compressor rotor and a compressor. The double-screw-rod compressor rotor comprises an inner rotor and an outer rotor which mesh with each other, the molded line of the inner rotor is an inner equidistant line of a spacial curtate epicycloid, the molded line of the outer rotor is a conjugate curve of the spacial curtate epicycloid, molded surfaces of the inner rotor and the outer rotor are respectively formed by spirally scanning the molded lines of the inner rotor and the outer rotor in a variable-pitch manner, along with rotation of the inner rotor and the outer rotor, the volume of an element is gradually reduced from the large end to the small end, and compressed fluid is sucked in from the large end and discharged from the small end. According to the variable-pitch spacial internal meshing conical double-screw-rod compressor rotor and the compressor, the inner equidistant line of the spacial curtate epicycloid is used as the basic molded line of the rotor structure so that the rotor can simultaneously meet the requirements of variable pitch, internal meshing and taper; an inner meshing screw rod can greatly reduce the size of the center distance, a complete closed volume can be formed without a machine shell, the length of a contact line is reduced, and leakage can be effectively reduced; and the compressor 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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