An angle-adjustable fan blade assembly

Abstract

The invention discloses an angle adjustable fan blade assembly which comprises a fan body, a front connecting disc and a rear connecting disc, wherein an inserting hole is formed in the middle of therear connecting disc; a tubular rear blade handle communicating with the inserting hole is formed on the rear end face of the rear connecting disc; a tubular front blade handle is formed on the frontend face of the front connecting disc; a connecting block is welded and fixed to the front end of the front blade handle; the fan body is welded and fixed to the connecting block; a core shaft is inserted in the rear blade handle of the rear connecting disc; the front end of the core shaft is welded and fixed to the front connecting disc; a rear retaining disc is formed at the rear end of the coreshaft; a cylindrical silica gel stopper and a front chuck are arranged on the core shaft in an inserting and sleeving manner; and the silica gel stopper is clamped between the rear retaining disc andthe front chuck and is propped against the inner wall of the rear blade handle.

Description

Technical field [0001] The invention relates to the technical field of fans, and more particularly to a fan blade assembly with adjustable angles. Background technique [0002] At present, fans are used in places with large heat generation or poor ventilation conditions such as factories, power stations, and underground passages. The air volume of the fan is determined by the motor power and the fan blade angle of the fan. At present, some fan manufacturers use the blades on the fan impeller. The angle setting is adjustable, which is convenient for debugging and testing to obtain the fan blade angle with the least energy consumption and the largest air output; the current adjustable fan blade generally connects the blade body to a connecting plate, and the rear side of the connecting plate is set There is a connecting disc with a petiole, and an arc-shaped adjusting groove is formed on the connecting disc with a petiole. The two connecting discs are fixedly connected by a bolt as...

AI Technical Summary

Problems solved by technology

[0002] At present, fans are used in places with high heat generation or poor ventilation conditions such as factories, power stations, and underground passages. The air volume of the fan is determined by the power of the motor and the angle of the fan blades; The angle setting is adjustable, which is convenient for debugging and testing to obtain the fan blade angle with the least energy consumption and the largest air output; the current adjustable fan blade generally connects the blade body to a connecting plate, and the rear side of the connecting plate is set. There is a connecting plate with a petiole, and an arc-shaped adjustment groove is formed on the connecting plate with a petiole. The two connecting plates are fixed by a bolt assembly. Loosening the bolt can rotate the angle of the fan blade, but the angle of the positioning fan blade The final function of restricting the re-rotation of the fan blade is only the friction between the two connecting discs, and when the fan blade does work, the force will cause the bolt to loosen, and the loosening of the bolt will cause the angle position of the fan blade to change, which will affect the test result; thus It is necessary to design a fan blade assembly that can strengthen the connection strength between the connection plates and can be easily adjusted

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