Bionic axial-flow fan

Abstract

The invention relates to an efficient, energy-saving and low-noise bionic axial-flow fan, comprising an axial-flow fan, wherein a plurality of non-equidistant sawtooth-shaped slots are arranged at the tail of each fan blade in the axial-flow fan; and the non-equidistant sawteeth are used for cutting and carding the big eddies generated at an air outlet into countless small eddies and effectively separating and guiding the viscous flow at the roots of the fan blades to ensure the flow to become ideal flow. The bionic axial-flow fan has the following advantages: after repeated tests and proofs of fast Fourier transform (FFT) noise software, the fan which is of a non-equidistant sawtooth-shaped structure can reduce the noise by about 1.5dB and 1dB respectively compared with the blade profilewithout a sawtooth-shaped structure and the blade profile with equidistant sawtooth-shaped structure, thus playing a role in optimizing noises in the unit of the axial-flow fan.

Description

technical field [0001] The invention relates to a bionic axial flow fan with high efficiency, energy saving and low noise, which belongs to the field of blade manufacturing of the axial flow fan. Background technique [0002] CN201159203Y, titled "a low-noise axial flow fan blade", the blade is forward-swept and has an acute angle of 20° to 35°; the blades are curved in both radial and tangential directions, and each of the blades The circumferential section is airfoil-shaped, and its relative thickness is 4% to 12%. From the top of the blade to the root of the blade, it gradually becomes thicker. One or more blades are arranged on the surface of the blade, and the blade is provided with a fixed connection with the hub. The main point is to set the rear edge of the blade as a corrugated curved surface segment structure. Its shortcomings: First, the rear edge of the blade is a corrugated surface section, which can neither effectively cut and comb the large vortex generated...

AI Technical Summary

Problems solved by technology

Its shortcomings: First, the rear edge of the blade is a corrugated surface section, which can neither effectively cut and comb the large vortex generated at the wind outlet into countless small eddies, nor can it effectively separate the viscous airflow to the blade root, which is not effective. Due to the guiding effect, the ideal airflow cannot be formed, so the efficiency is low and the noise is large

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