Disc-shaped star wheel of single-screw compressor and its forming process

Abstract

The invention discloses a disc type star wheel piece for a single-screw compressor and a forming process of the disc type star wheel piece. The star wheel piece comprises a wheel palm in the center. A shaft hole is formed in the center portion of the wheel palm. Multiple star wheel teeth are arranged on the outer side of the wheel palm. The disc-shaped star wheel piece of the single-screw compressor is placed on a platform face in the free state, and the outer circle ends of the star wheel teeth are bent downwards; and the tooth ends of all the or part of the star wheel teeth make contact with the platform plane. According to the disc type star wheel piece for the single-screw compressor, through pre-heat-setting treatment, the wheel teeth on the star wheel piece are bent in the star wheel frame plane direction in the free state, when the portion near the inner circle of the star wheel piece is pressed by a pressing plate, the teeth of the star wheel piece are tightly attached to the plane of a star wheel frame, and the interior of the star wheel teeth has the downward-bending inner stress, so that the star wheel piece is prevented from deforming upwards freely through the bending inner stress, and the upward free warping phenomenon is avoided. A preserved gap between the star wheel piece and the partition face of a star wheel window of an air cylinder is reduced, and the medium leakage rate of the compressor is lowered effectively.

Description

technical field [0001] The invention relates to the technical fields of petrochemical, refrigeration and air-conditioning compressors and aerodynamic compressors, in particular to a single-screw compressor disc-shaped star wheel and its forming process. Background technique [0002] The existing single-screw compressor star wheels in the domestic and foreign markets are all tooth-shaped discs, and the upper and lower end faces of the star wheel are straight in a free state. For the convenience of description, first define the surface where the star wheel contacts the star wheel frame as the lower surface of the star wheel, and the surface where the star wheel matches with the cylinder window partition surface is the upper surface. Due to the thin thickness of the star wheel and the relatively large length and diameter of the teeth, the straight star wheel in the free state is prone to warping and deformation to varying degrees after being installed in the compressor for a pe...

AI Technical Summary

Problems solved by technology

If the star gear teeth are deformed upwards by several millimeters, the reserved clearance should be the amount of deformation of the star gear teeth plus the required clearance, resulting in excessive clearance and increased leakage of the sealing medium

If the reserved gap is too small, the star gear teeth will directly hit the window separation surface of the cylinder when it rotates, causing the star wheel to be scratched or broken. Many compressor star wheels have been damaged in this way in the project

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