Oil-free double-screw compressor

Abstract

The invention discloses an oil-free double-screw compressor. A male rotor is coaxially fixedly provided with a first axis embedding member and a female rotor is coaxially fixedly provided with a second axis embedding member; the first axis embedding member and the second axis embedding member are pivoted on a bearing block and are movably sealed together with the bearing block; the first axis embedding member and the second axis embedding member are hinged with an end cover of a synchromesh gear cavity; one end, which is located in the synchromesh gear cavity, of the first axis embedding member is fixedly connected with a small synchromesh gear; and one end, which is located in the synchromesh gear cavity, of the second axis embedding member is fixedly connected with a big synchromesh gear. Shaped line screw thread parts of the male rotor and female rotor of the oil-free double-screw compressor are manufactured from certain special materials which do not need to be subjected to heat treatment or certain special materials which are machined by other means difficult to deform, and the second axis embedding member of the female rotor and the first axis embedding member of the male rotor are manufactured from materials which meet the mechanical strength requirements, so that the machining difficulty of the male rotor and the female rotor is reduced when the special materials are used, and the application range of the oil-free double-screw compressor is widened.

Description

technical field [0001] The invention relates to the technical field of manufacturing screw compressors, in particular to an oil-free twin-screw compressor. Background technique [0002] In the existing market, twin-screw compressors are generally divided into oil-injected screw compressors and oil-free screw compressors. [0003] The oil-injected screw compressor is an oil-injected single-stage twin-screw compressor, which is driven by a high-efficiency pulley (or coupling) to drive the main engine to rotate to compress the air; the working process of the oil-injected screw compressor In the process, the oil is sprayed into the rotor chamber to realize the sealing between the male rotor and the female rotor and the sealing between the male rotor and the female rotor and the inner wall of the rotor chamber; in addition, the oil can also protect the air caused by air compression. It can also be used to lubricate the internal parts of the oil-injected screw compressor; finally...

AI Technical Summary

Problems solved by technology

[0008] First of all, due to the equipment characteristics of the oil-free twin-screw compressor, the machining accuracy of the female rotor and the male rotor is particularly high, and the steel structure is easily deformed during heat treatment processes such as surface quenching, resulting in a gap between the male rotor and the female rotor. The matching profile structure is difficult to process; in addition, in some special fields, the female rotor and the male rotor of the oil-free twin-screw compressor need to be processed with some special materials, and the mechanical strength of this special material cannot meet the needs of the female rotor and male rotor. The mechanical strength of the joints between the male rotor and synchronous gears and bearings

[0009] Therefore, the oil-free twin-screw compressor in the prior art, because of the problem of the female rotor and the male rotor, has caused the application range of the oil-free twin-screw compressor to be greatly limited

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