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Axial flow fan blade and fan with the same

A technology of axial-flow blades and blades, which is applied to the components of pumping devices for elastic fluids, mechanical equipment, machines/engines, etc., can solve problems such as loss of air supply volume, achieve weakening vortex intensity, increase air volume, Reduce the effect of shock

Pending Publication Date: 2020-04-17
NINGBO LANGDI IMPELLER MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this solution reduces the noise level to a certain extent, there is a loss in the air supply volume

Method used

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  • Axial flow fan blade and fan with the same
  • Axial flow fan blade and fan with the same
  • Axial flow fan blade and fan with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: as figure 2 , Figure 4 As shown, an axial fan blade includes a hub 1 and a plurality of blades 2 arranged around the hub, and the trailing edge 3 of the blade is provided with a plurality of recessed groove structures 4 perpendicular to the trailing edge direction along the trailing edge direction, Protrusions 5 are formed between adjacent groove structures, the axial projection lines of the protrusion edges 6 are circular arcs, and the centers of the axial projection lines of the plurality of protrusion edges are on the same circumferential line.

[0027] Since the angular velocity of the blades is the same when they rotate, the radial velocity of the axial flow blades becomes larger and larger, and the radial exhaust air volume along the axial flow blades gradually increases. Therefore, the closer to the outer edge of the blades, the greater the air volume, resulting in The more eddy currents, the greater the eddy current intensity, the greater the ai...

Embodiment 2

[0043] Embodiment 2: A fan, including the axial flow blade in Embodiment 1.

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Abstract

The invention relates to an axial flow fan blade and a fan with the same. The axial flow fan blade comprises a hub and a plurality of blades arranged around the hub, wherein a plurality of groove structures recessed in the direction perpendicular to a tail edge are arranged on a tail edge of each blade in the tail edge direction, a protrusion is formed between every two adjacent groove structures,the axial projection lines of edges of the protrusions are arcs, and the circle centers of the axial projection lines of the edges of the protrusions are located on the same circumferential line. A plurality of groove structures are formed on the tail edge of the blade, so the airflow on the pressure surface part dispersedly flows into a back pressure surface, the vortex generated by the back pressure surface is dispersed, the vortex intensity of the back pressure surface of the axial flow fan blade can be effectively weakened, and the impact of the wake vortex of the previous axial flow fanblade on the next axial flow fan blade is reduced, so the air volume can be effectively increased, and the noise of the axial flow fan is reduced.

Description

technical field [0001] The invention relates to the field of axial flow fans, in particular to an axial flow fan blade. Background technique [0002] Axial flow fan blades are widely used in daily life, and the axial flow refers to the airflow flowing in the same direction as the axis of the fan blade. Common axial flow blades are mainly composed of a hub and multiple blades arranged around the hub. Although the structure is simple, the data parameters of the detailed structures of the axial flow blades are very high, which affects the operation and noise of the axial flow blades. Control has a big impact. [0003] Such as figure 1 As shown, the Chinese invention whose authorized notification number is CN 107355425 A discloses a high-noise elimination axial-flow fan blade, including a hub and blades arranged on the side of the hub, and the middle part of the trailing edge of the blade is provided with a The V-shaped groove extending from the central area of ​​the blade, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/32F04D29/38F04D29/66
CPCF04D29/325F04D29/388F04D29/666F04D29/667
Inventor 柴水华洪银川韩小红高文铭周会中张燕青符文科章小静张焕法
Owner NINGBO LANGDI IMPELLER MACHINERY
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