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Bionic axial flow fan blade and modification method thereof

An axial flow fan, bionic technology, applied to the parts of the pumping device for elastic fluid, non-variable pumps, pump components, etc., can solve the problem of power and noise reduction, blade tip leakage wake, low efficiency, etc. problem, achieve the effect of improving load distribution, increasing efficiency and reducing noise

Active Publication Date: 2022-03-11
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to improve the problems of high power consumption, low efficiency and high noise of existing axial flow fan blades, the purpose of the present invention is to provide a bionic axial flow fan blade and its The modification method, wherein the bionic structure modification is carried out on the tail edge structure of the axial flow fan blade, and the V-shaped concave angle structure of the tail fin of fish in nature is used for reference, and the sawtooth structure of bird wings is further optional The trailing edge profile can be modified, and the detailed structure of the trailing edge profile can be further optimally controlled (for example, the position selection of each control point, such as the radial position and the angle between the control points, the position of the sawtooth structure and Shape selection, etc.), compared with the original impeller, the load distribution of the obtained bionic axial fan blade is improved, the leakage flow and wake at the tip of the blade are weakened, and the power and noise are reduced, especially suitable for low pressure (full pressure<=1000Pa) fan field

Method used

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  • Bionic axial flow fan blade and modification method thereof
  • Bionic axial flow fan blade and modification method thereof
  • Bionic axial flow fan blade and modification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] In this embodiment, the radius R of the impeller is 211 mm, the hub ratio is 0.213, and the number of blades is 3.

[0066] The first control point (1) is located on the original trailing edge (5) of the axial flow fan blade, and the radius R of the first arc (10) where it is located 1 The ratio to the radius R of the axial flow fan blade is 0.924, that is, the radius R of the first arc (10) 1 195mm;

[0067] The radius R of the second circular arc (11) where the second control point (4) is located 2 The ratio to the radius R of the axial flow fan blade is 0.607, that is, the radius R of the second arc (11) 2 is 128mm, the intersection point between the second control point (4) and the second circular arc (11) and the original trailing edge (5) of the axial fan blade, that is, the corresponding central angle (θ t ) is 13.5°;

[0068] The third control point (3) is located on the original trailing edge (5) of the axial flow fan blade, and the radius R of the third ar...

Embodiment 2

[0074] In this embodiment, the radius R of the impeller is 211 mm, the hub ratio is 0.213, and the number of blades is 3.

[0075] The first control point (1) is located on the original trailing edge (5) of the axial flow fan blade, and the radius R of the first arc (10) where it is located 1 The ratio to the radius R of the axial flow fan blade is 0.924, that is, the radius R of the first arc (10) 1 195mm;

[0076] The radius R of the second circular arc (11) where the second control point (4) is located 2 The ratio to the radius R of the axial flow fan blade is 0.607, that is, the radius R of the second arc (11) 2 is 128mm, the intersection point between the second control point (4) and the second circular arc (11) and the original trailing edge (5) of the axial fan blade, that is, the corresponding central angle (θ t ) is 13.5°;

[0077] The third control point (3) is located on the original trailing edge (5) of the axial flow fan blade, and the radius R of the third ar...

Embodiment 3

[0085] In this embodiment, the radius R of the impeller is 560 mm, the hub ratio is 0.25, and the number of blades is 4.

[0086] The first control point (1) is located on the original trailing edge (5) of the axial flow fan blade, and the radius R of the first arc (10) where it is located 1 The ratio to the radius R of the axial flow fan blade is 0.893, that is, the radius R of the first arc (10) 1 500mm;

[0087] The radius R of the second circular arc (11) where the second control point (4) is located 2 The ratio to the radius R of the axial flow fan blade is 0.563, that is, the radius R of the second arc (11) 2 is 315mm, the intersection point between the second control point (4) and the second circular arc (11) and the original trailing edge (5) of the axial fan blade, that is, the corresponding central angle (θ t ) is 9°;

[0088] The third control point (3) is located on the original trailing edge (5) of the axial flow fan blade, and the radius R of the third arc (1...

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Abstract

The invention belongs to the technical field of fan blades, and discloses a bionic axial flow fan blade and a modification method thereof.The axial flow fan blade is used for rotating around a fan blade rotating shaft, and the projection curve of the tail edge of an impeller of the axial flow fan blade on the plane perpendicular to the fan blade rotating shaft is a bionic molded line; comprising a concave included angle structure formed by cutting blades inwards, and the cut included angle ranges from 145 degrees to 175 degrees. The tail edge structure of the axial flow fan blade is subjected to bionic structure modification, the tail edge molded line is modified by combining a V-shaped concave included angle structure of a tail fin of a fish in nature and a further optional sawtooth structure of a bird wing, the detail structure of the tail edge molded line can be further preferably controlled, and compared with an original impeller, the tail edge structure of the axial flow fan blade is improved, and the service life of the axial flow fan blade is prolonged. The load distribution of the obtained bionic axial flow fan blade is improved, the blade top leakage flow and wake are weakened, the power and noise are reduced, and the bionic axial flow fan blade is particularly suitable for the field of low-pressure fans.

Description

technical field [0001] The invention belongs to the technical field of fan blades, and more specifically relates to a bionic axial flow fan blade and its modification method. Through the bionic design and modification of the axial flow fan blade, the tail fin structure of fish and birds in nature are used for reference. The load distribution of the bionic axial fan blade obtained by the modification of the wing-like sawtooth structure is improved, the leakage flow and wake at the blade tip are weakened, and the power and noise are reduced. It is especially suitable for the field of low-pressure fans, especially the axial fan blades in the outdoor unit of air conditioners . Background technique [0002] Axial fan blades have the advantages of large flow, low pressure, low noise, and easy installation, and are widely used in ventilation, ventilation, and cooling in factories, homes, office buildings, and public places. With the enhancement of people's awareness of energy savi...

Claims

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Application Information

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IPC IPC(8): F04D29/38F04D29/66
CPCF04D29/388F04D29/666F05D2240/304
Inventor 王军梁钟肖千豪李志昂王威蒋博彦丁炎炎王宇杰
Owner HUAZHONG UNIV OF SCI & TECH
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