Zigzag noise reduction axial flow blade

Abstract

The invention relates to a zigzag noise reduction axial flow blade. The zigzag noise reduction axial flow blade comprises a center shaft sleeve (1) and a plurality of blade bodies (2) evenly distributed on the outer circumferential wall of the center shaft sleeve (1) in the circumferential direction. The zigzag noise reduction axial flow blade is characterized in that a row of zigzag grooves (3) are formed in the tail edge of each blade body (2); and at least quarter of all the zigzag grooves (3) are equal in the groove opening width and groove depth. The zigzag noise reduction axial flow blade has the advantages of the good noise reduction effect and high universality.

Description

technical field [0001] The invention relates to an axial-flow fan blade, in particular to a saw-tooth type noise-reducing axial-flow fan blade. Background technique [0002] The blade structure of the fan is an important factor in determining the noise of the fan. The outdoor units of air conditioners generally use axial flow fan blades, which will generate large aerodynamic noise due to the disordered air flow on the surface of the fan blades and the vortex separation at the trailing edge of the fan blades when rotating at high speed, which will affect the aerodynamic performance of the fan blades. In order to reduce the noise generated during the operation of the axial flow fan blades, most of the axial flow fan blades in the prior art adopt a noise reduction structure with sawtooth at the trailing edge of the blade. For example, the invention patent with the application number "201110000018.8" and the application number are The invention patent of "201210050649.5" respec...

AI Technical Summary

Problems solved by technology

The outdoor units of air conditioners generally use axial-flow fan blades, which will generate large aerodynamic noise due to the turbulent air flow on the surface of the fan blades and the vortex separation at the tail edge of the fan blades when rotating at high speed, which will affect the aerodynamic performance of the fan blades

In order to reduce the noise generated during the operation of the axial flow fan blades, most of the axial flow fan blades in the prior art adopt a noise reduction structure with sawtooth at the trailing edge of the blade. For example, the invention patent with the application number "201110000018.8" and the application number are The invention patent of "201210050649.5" respectively discloses a kind of axial flow fan blade with a blade without a sawtooth structure. The noise effect is not obvious, and the sawtooth structure involved in the two is also less versatile

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