Three-motor driven single-screw compressor

Abstract

The invention discloses a three-motor driven single-screw compressor. The three-motor driven single-screw compressor comprises a screw arranged in a machine shell and two star wheels symmetrically arranged on the two sides of the screw. The screw and the two star wheels are independently connected with three motors through couplers, the three motors are connected with a power source, and the rotating speeds of the motors can be controlled through a frequency converter. The frequency converter is provided with a controller, the rotating speed ratio is set in the controller, and the set frequency is set in the frequency converter. The screw and the star wheels rotate synchronously and do not make contact with one another, and a sealed air cavity is formed by a screw groove of the screw, theinner wall of the machine shell and teeth of the star wheels. The machine shell is provided with a gas inlet and a gas outlet, gas enters the screw groove from the gas inlet through a gas suction cavity, when the teeth of the star wheels move relatively in the screw groove, the volume of the sealed gas cavity is gradually reduced, gas is compressed, and the compressed gas is discharged from the gas outlet through a gas outlet cavity. By means of the three-motor driven single-screw compressor, the star wheel abrasion problem of a single-screw compressor can be solved, the rotating speed of thescrew rod and the star wheels is adjusted, stepless variable-flow adjustment can be achieved, and the pressure ratio of the compressor is changed.

Description

technical field [0001] The invention belongs to the field of compressor structure design, in particular to a single-screw compressor driven by three motors. Background technique [0002] Single-screw compressors are a type of positive displacement compressors. The existing single-screw compressors on the market are composed of a cylindrical screw and two symmetrically arranged planar star wheels, which are installed in the casing. The screw groove, the inner cavity of the casing, and the tooth top surface of the star wheel constitute the working volume, and the star wheel is driven to rotate by the screw to complete the suction, compression, and exhaust processes of the single-screw compressor. [0003] The single-screw compressor has a simple structure, no air valve, less wearing parts, small size, compact structure, and convenient maintenance, and the single-screw compressor has two star wheels symmetrically arranged on both sides of the screw, making the single-screw comp...

AI Technical Summary

Problems solved by technology

However, because the single screw is driven by the screw to rotate two symmetrically distributed star wheels, the wear of the star wheels is serious, which is related to materials, lubrication, processing, operation, etc. Over the years, domestic and foreign efforts have been made to improve the above aspects, but still There is no good solution to the problem of star wheel wear. In addition, oil-free screw compressors generally use water spray lubrication, but the effect is not good, and it has not been promoted to the market on a large scale.

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