Screw wheel structure

Abstract

The invention provides a screw wheel structure which comprises a central shaft, wherein at least one screw blade is arranged on the central shaft; each screw blade at least forms a complete circle on the central shaft; the projection of the screw blade in the axial direction of the central shaft is a circle; the external edge of the screw blade is tangent to the circle projection; the radial thickness of the screw blade decreases gradually from the middle part to the external edge; and an edge part is formed on the external edge of the screw blade. The screw blade of the screw wheel structure is projected to form a regular circle, so, when the screw wheel structure is applied in the field of transmission, the edge part of the screw blade can be tightly fitted with the inner wall of a pipe to convey all materials out, and the sealing effect between the edge part of the screw blade and the inner wall of the pipe is excellent; and when the screw wheel structure is applied in the field of machining, the screw wheel can be mounted at the tail part of a drill to serve as a tool and is used for polishing the inner wall of a drilled hole to implement precise machining or for drilling the earth surface to achieve a good effect.

Description

technical field [0001] The invention relates to the technical field of liquid and fluid transportation or the technical field of mechanical processing, in particular to a spiral wheel structure with good sealing performance. Background technique [0002] The screw conveyor can transport materials that traditional shaft screw conveyors and belt conveyors cannot or are not easy to transport, such as granular and powdery materials. Liquid and pasty materials, semi-fluid and viscous materials. The working principle of the screw conveyor is that the rotating helical blades push the material forward. The weight of the material itself and the frictional resistance of the screw conveyor casing to the material prevent the material from rotating with the screw conveyor blades. [0003] However, the existing helical blade structure is usually of the same thickness. Due to the limitation of machining accuracy, when the helical blade rotates in the pipe, it cannot form a tight fit with ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing helical blade structure is usually of the same thickness. Due to the limitation of machining accuracy, when the helical blade rotates in the pipe, it cannot form a tight fit with the inner wall of the pipe, causing the conveyed material to pass between the helical blade and the inner wall of the pipe. String out, easy to get stuck between the spiral blade and the inner wall of the tube, such as when transferring fluid or semi-fluid, it will affect the transfer efficiency

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