Multistage compression fluid machine

Abstract

A multistage compression fluid machine comprises a shell and a multistage compression mechanism; the shell has a compression cavity; the multistage compression mechanism is arranged in the compression cavity and includes a sealed separation structure, a male rotor, a first female rotor and a second female rotor; the sealed separation structure separates the compression cavity into a first compression cavity and a second compression cavity, sheaths the female rotating shaft of the female rotor, and rotates with the female rotating shaft; the first female rotor is arranged in the first compression cavity and is engaged with the first screw of the male rotor; and the second female rotor is arranged in the second compression cavity and is engaged with the second screw of the male rotor, so the flow of gases in the first compression cavity and the second compression cavity is sealed and obstructed.

Description

technical field [0001] The invention relates to a fluid machine, in particular to a fluid machine with multi-stage compression. Background technique [0002] Spiral fluid machinery is a common equipment in fluid machinery. Its application fields include industry, commerce, residential or transportation... etc. For any occasions that need to compress air into high-pressure gas, spiral fluid machinery can be used to compress air into high-pressure Gas; however, if the pressure of the required high-pressure gas is high, it is often necessary to use more than two screw fluid machines in series so that the air can be compressed into a higher-pressure gas through multiple screw fluid machines. The above spiral will take up too much space, so a multi-stage spiral fluid machine has been developed to overcome the shortcoming of taking up too much space. [0003] Existing multi-stage screw fluid machinery includes a casing, a partition, a male rotor, a first female rotor and a second...

AI Technical Summary

Problems solved by technology

[0004] However, the existing multi-stage screw fluid machinery still has the following disadvantages. Since the male rotor only passes through the diaphragm, when the male rotor rotates, the diaphragm will not rotate, so the gas in the first compression chamber and the second compression chamber will pass through the male rotor. The gap between the rotor and the partition communicates with each other, so that the compression efficiency of the first compression chamber and the second compression chamber is not good; and if the gap between the male rotor and the partition is to be closed, the male rotor and the partition must be separated. The accuracy of the fit tolerance between the plates is reduced to zero, so it will cause difficult processing conditions, making this technology difficult to realize

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