Blade and shaft connecting structure convenient for dismounting and manufacturing method thereof

Abstract

A blade and shaft connecting structure convenient for dismounting and a manufacturing method thereof. The method comprises the following steps: first machining a shaft (1), milling bayonets for installation blades and carrying out finish machining on each bayonet surface (1a) to a required dimension; then manufacturing integral blades (2), machining a center aperture capable of assembling with the shaft (1) in the center of each blade, manufacturing ears at two sides of a middle part of each blade and machining installing holes on the ears; after manufacturing of the integral blade, cutting the integral blade into two halves transversely along the center, wherein each half blade, at center of the bottom, is provided with processed semicircle bottom recess (2a) capable of assembling with the shaft (1), and two sides of blade bottom are provided with ears (2b) processed with installing holes; splicing the two half blades and clamping in bayonets of the shaft and connecting the blades by coupling screws (3). The connecting structure of the invention can realize reliable connection of the blades and the shaft, is convenient for maintenance, dismounting and replacing, and can avoid shaft deformation and reduce vibration and noise during operation.

Description

technical field [0001] The invention relates to the technical field of connection between a blade and a shaft or between a blade and a shaft in a mechanical device. Background technique [0002] For a long time, the connection between blades and shafts or blades and shafts in pulverizers, ball mills and other equipment has been used such as figure 1 In the welding connection method shown, the blade B is put on the shaft A through the center hole in the middle of the blade, and then the blade and the shaft are welded together, so that the blade or the blade is firmly connected with the shaft. This method solves the problem of firm connection, but if a blade is damaged, it can only be cut off with oxygen, and then replaced with a new blade. Not only the maintenance and replacement parts remain unchanged, but the maintenance cost is high, and the welding process produces The heat will also cause thermal deformation of the shaft, and each replacement of the blades will also cau...

AI Technical Summary

Problems solved by technology

This method solves the problem of firm connection, but if a blade is damaged, it can only be cut off with oxygen, and then replaced with a new blade. Not only the maintenance and replacement parts remain unchanged, but the maintenance cost is high, and the welding process produces The heat will also cause thermal deformation of the shaft, and every time the blade is replaced, the shaft will also be thermally deformed, which cannot guarantee the original accuracy, resulting in abnormal vibration and noise during operation

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