Centrifugal impeller and blowing and inducing device comprising same

Abstract

The invention relates to a centrifugal impeller, which comprises a wheel disc, a hub and a plurality of vanes, wherein the hub is positioned on the center of one side surface of the wheel disc and is provided with a central axis, and the centrifugal impeller rotates around the central axis; the vanes are arranged on the side surface and extend to the periphery of the wheel disc from the hub; each vane comprises a windward side and a leeside; each vane is provided with a plurality of sawteeth; the sawteeth are positioned on the rear end of the blades which are near the periphery of the wheel disc, radially extend to the periphery of the wheel disc from the center of the wheel disc and are at least positioned on the leeside. Since the tail ends of the vanes are provided with the sawteeth used for breaking vortex, the vortex is segmented by the sawteeth when the vortex is about to fall from the rear ends of the vanes, i.e. the big-scale vortex is broken into the small-scale vortex by the sawteeth, airflow resistance is reduced, the vibration of the centrifugal impeller is reduced, and noise is lowered.

Description

technical field [0001] The invention relates to a centrifugal impeller. [0002] The invention also relates to a blowing device comprising the centrifugal impeller. Background technique [0003] Existing blowing and sucking devices (comprising blower and blowing and sucking machine) mainly include air inlet, air outlet, volute, the impeller that is located in the volute, the motor that is used to drive impeller to rotate, and blowing and adsorbing parts. Generally speaking, the impellers in the blowing device are all centrifugal impellers. The centrifugal impeller mainly includes a disc, a hub located in the center of the disc, and a plurality of blades located in the annular area surrounded by the hub and the edge of the disc. Blades, wherein the shape and arrangement of the blades determine the air volume, air output efficiency and noise quality of the centrifugal impeller to a certain extent. [0004] At present, although the bending direction and curvature of the blade...

AI Technical Summary

Problems solved by technology

This will not only affect the efficiency of the impeller, but also generate greater vibration and noise

Although there are endless improvement measures for impeller performance optimization, they are mainly improved from the installation angle of the blade, the change of the inner and outer diameter of the blade, and the uniform arrangement of the circumferential angle of the blade, etc., and have not achieved very ideal results.

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