CN202431609U - Fan blade - Google Patents
Fan blade Download PDFInfo
- Publication number
- CN202431609U CN202431609U CN2012200408002U CN201220040800U CN202431609U CN 202431609 U CN202431609 U CN 202431609U CN 2012200408002 U CN2012200408002 U CN 2012200408002U CN 201220040800 U CN201220040800 U CN 201220040800U CN 202431609 U CN202431609 U CN 202431609U
- Authority
- CN
- China
- Prior art keywords
- fan
- fan blade
- boundary layer
- blade
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a fan blade which is structurally characterized in that a plurality of concave-convex units are arranged on the surface of the fan blade. Roughness of the surface of the blade is improved by means of the concave-convex units arranged on the surface of the fan blade, and accordingly a laminar boundary layer of the surface of the fan blade can be converted into a turbulent boundary layer more quickly. Since the turbulent boundary layer is higher in separation resistance than the laminar flow boundary layer, friction resistance of the fan blade can be effectively reduced, air output of the fan can be increased, and efficiency of the fan is improved. Rotation speed of the fan can be reduced to lower fan noise on the premise that the air output is kept unchanged. The fan blade is low in cost and energy consumption and remarkably effective in noise reduction.
Description
Technical field
The utility model relates to a kind of ventilation equipment, specifically a kind of fan blade.
Background technique
Blower fan can produce noise when running up, this is because the blower fan of motion and the impact between the contacted moving gaseouse medium, vibrations and friction cause.This noise generally is that people are undesirable, even human body is harmful to.In most of the cases, this noise is to propagate in the media through medium, environment is produced pollute, and therefore, reduces the noise that moving element produces in the air, has great importance for reducing noise pollution.
The model utility content
The purpose of the utility model just provides a kind of fan blade, to solve the low and big problem of noise of fan efficiency.
The utility model is achieved in that a kind of fan blade, on the surface of fan blade, is provided with some concavo-convex cell cubes.
Said concavo-convex cell cube is domed convexity, or the groove of hemisphere, taper shape or pyramid shape.
Aerodynamics analysis through to existing single-stage propeller fan shows; The size of fan efficiency and noise and the aerodynamic characteristic of impeller are closely related; And the impeller aerodynamic characteristic depends primarily on the shape of blade and the roughness of blade surface, and the roughness of blade surface is a main cause that influences fan efficiency and noise.The utility model is exactly to increase the roughness of blade surface through some concavo-convex cell cubes are set on fan blade, can impel the fan blade surface boundary layer to convert turbulent boundary layer to from laminar flow quickly thus.Because turbulent boundary layer has stronger anti-separating power than laminar boundary layer, thereby can reduce the surface friction drag of fan blade effectively, increase the air output of blower fan, improve fan efficiency.Keeping then can reducing the rotating speed of blower fan under the constant precondition of air output, reduce fan noise.The utility model cost is low, and energy consumption is low, and noise reduction is remarkable.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
As shown in Figure 1, the utility model is established the some concavo-convex cell cube 2 that adds definite shape and have the corresponding regularity of distribution on the surface of existing fan blade 1, to increase the roughness on fan blade 1 surface.These concavo-convex cell cubes 2 can be domed convexities, or the groove of hemisphere, taper shape or pyramid shape.The arrangement mode of concavo-convex cell cube 2 on fan blade 1 can be that rectangle, rhombus or circular concentric are arranged.
Claims (2)
1. a fan blade is characterized in that, on the surface of fan blade (1), is provided with some concavo-convex cell cubes (2).
2. fan blade according to claim 1 is characterized in that, said concavo-convex cell cube (2) is domed convexity, or the groove of hemisphere, taper shape or pyramid shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200408002U CN202431609U (en) | 2012-02-09 | 2012-02-09 | Fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200408002U CN202431609U (en) | 2012-02-09 | 2012-02-09 | Fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431609U true CN202431609U (en) | 2012-09-12 |
Family
ID=46781060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200408002U Expired - Fee Related CN202431609U (en) | 2012-02-09 | 2012-02-09 | Fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431609U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632700A (en) * | 2015-02-06 | 2015-05-20 | 浙江理工大学 | Dual-impeller device of centrifugal blower |
| CN104661915A (en) * | 2012-09-25 | 2015-05-27 | 梅西耶道蒂有限公司 | Airflow modification patch and method |
| CN105317734A (en) * | 2014-06-25 | 2016-02-10 | 华北电力大学（保定） | Aerofoil blade of ridged surface drag reduction |
| CN112879343A (en) * | 2019-11-29 | 2021-06-01 | 中国航发商用航空发动机有限责任公司 | Aircraft engine blade and aircraft engine |
-
2012
- 2012-02-09 CN CN2012200408002U patent/CN202431609U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104661915A (en) * | 2012-09-25 | 2015-05-27 | 梅西耶道蒂有限公司 | Airflow modification patch and method |
| US10286996B2 (en) | 2012-09-25 | 2019-05-14 | Safran Landing Systems Uk Ltd | Airflow modification patch and method |
| CN105317734A (en) * | 2014-06-25 | 2016-02-10 | 华北电力大学（保定） | Aerofoil blade of ridged surface drag reduction |
| CN104632700A (en) * | 2015-02-06 | 2015-05-20 | 浙江理工大学 | Dual-impeller device of centrifugal blower |
| CN112879343A (en) * | 2019-11-29 | 2021-06-01 | 中国航发商用航空发动机有限责任公司 | Aircraft engine blade and aircraft engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20150209 |
|
| EXPY | Termination of patent right or utility model |