CN203098386U - Axial fan blade - Google Patents
Axial fan blade Download PDFInfo
- Publication number
- CN203098386U CN203098386U CN 201220628892 CN201220628892U CN203098386U CN 203098386 U CN203098386 U CN 203098386U CN 201220628892 CN201220628892 CN 201220628892 CN 201220628892 U CN201220628892 U CN 201220628892U CN 203098386 U CN203098386 U CN 203098386U
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- fan blade
- blade
- chord length
- axial fan
- radius
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Abstract
The utility model relates to the technical field of cooling equipments, in particular to an axial fan blade. According to the axial fan blade, the arc length of the outer diameter of the fan blade is greater than the arc length of the inner diameter of the fan blade, and the chord length of the outer diameter is 1 to 2.5 times greater than the chord length of the inner diameter; connection lines of leaf-shaped central points on rotary semi-diameters of the fan blade are three-dimensional curves, offset angles are about 10+/-5 degrees, and an axial direction is in the form of an upward parabola, so that a twisty sickle leaf shape is formed; and the ratio of the chord length of each section of the fan blade and radius of curvature is controlled to be between 1.00 and 0.45.
Description
Technical field
The utility model relates to radiating device technical field, relates in particular to a kind of axial flow flabellum.
Background technique
Axial-flow blower, blower fan is along the axial fan-out wind forward of blower fan, as domestic electric fan etc.Civilian axial flow is many, but now domestic also the beginning used big axial-flow blower in industry, to arrive energy-conservation effect.In recent years because the develop rapidly of computer industry and the raising of industrial level, the small-size shaft flow fan that all will adopt high-performance, low noise of various device, it is a kind of effective method that the rotor blade shape of change fan is come noise reduction, the noise when reasonably blade shape can effectively reduce the fan use.
Summary of the invention
The utility model provides a kind of novel axial fan at deficiency of the prior art.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
The axial fan leaf, the external diameter arc length of flabellum is bigger than internal diameter arc length, and the outer radius chord length is 1-2.5 a times of inner radius chord length; Blade profile central point line is a three-dimensional curve on each turning radius of flabellum, and angle of eccentricity is about 10 ± 5 degree, and axial direction is upwards parabola, and the reaping hook that forms distortion is leaf; The ratio of each cross section chord length of flabellum and radius of curvature is controlled between the 1.00-0.45.
As preferably, blade is provided with stiffening rib.
As preferably, blade angle is 58 degree, and the difference of internal diameter established angle is controlled at ± 5 degree.
Axial fan leaf according to technological scheme of the present invention, because blade is to adopt the new and effective sweepforward reaping hook of arc thin plate blade profile in design, by becoming circular rector negative exponent flow pattern, high coefficient of lift combined design, the blade external form is that sickle shaped is wide outside and narrow inside, the three dimensional space distorted shape, make full use of the big characteristics of outer radius peripheral velocity, improve the acting ability of blade.By CFD specialty fluid mechanics Aided Design, characteristics efficient, energy-conservation, low noise are arranged by the blade of this design.
The main critical size of flabellum blade profile is described:
Blade angle 58 degree, the difference of internal diameter established angle be controlled at ± 5 degree between.
Blade profile central point line is a three-dimensional curve on each turning radius, and angle of eccentricity is about 10 ± 5 degree, and axial direction is upwards parabola.
The outer radius chord length is in 2.5 times of the inner radius, to have increased the twice stiffening rib on the blade.
The ratio of each cross section chord length and radius of curvature is controlled between the 1-0.45.The demonstration of test repeatedly through the airflow pressure test stand is improved, and can promote 10% Energy Efficiency Ratio than the fan blade of routine by the fan blade that becomes circular rector negative exponent flow pattern, high coefficient of lift combined design, has played critical effect aspect energy-conservation.
Description of drawings
Fig. 1 is the plan view of axial fan impeller structure of the present utility model.
Fig. 2 is the left view of axial fan impeller structure of the present utility model.
Fig. 3 is the structural front view of the fan of use axial fan leaf of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
The axial fan leaf, the external diameter arc length of flabellum is bigger than internal diameter arc length, and the outer radius chord length is 1-2.5 a times of inner radius chord length; Blade profile central point line is a three-dimensional curve on each turning radius of flabellum, and angle of eccentricity is about 10 ± 5 degree, and axial direction is upwards parabola, and the reaping hook that forms distortion is leaf; The ratio of each cross section chord length of flabellum and radius of curvature is controlled between the 1.00-0.45.Blade is provided with stiffening rib 1.Blade angle is 58 degree, and the difference of internal diameter established angle is controlled at ± 5 degree.
In a word, the above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (3)
1. axial fan leaf is characterized in that:
The external diameter arc length of flabellum is bigger than internal diameter arc length, and the outer radius chord length is 1-2.5 a times of inner radius chord length;
Blade profile central point line is a three-dimensional curve on each turning radius of flabellum, and angle of eccentricity is about 10 ± 5 degree, and axial direction is upwards parabola, and the reaping hook that forms distortion is leaf;
The ratio of each cross section chord length of flabellum and radius of curvature is controlled between the 1.00-0.45.
2. a kind of axial fan leaf according to claim 1 is characterized in that: blade is provided with stiffening rib (1).
3. a kind of axial fan leaf according to claim 1 and 2 is characterized in that: blade angle is 58 degree, and the difference of internal diameter established angle is controlled at ± 5 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220628892 CN203098386U (en) | 2012-11-23 | 2012-11-23 | Axial fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220628892 CN203098386U (en) | 2012-11-23 | 2012-11-23 | Axial fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203098386U true CN203098386U (en) | 2013-07-31 |
Family
ID=48849794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220628892 Expired - Fee Related CN203098386U (en) | 2012-11-23 | 2012-11-23 | Axial fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203098386U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373383A (en) * | 2014-11-28 | 2015-02-25 | 德清振达电气有限公司 | Efficient blade of axial fan |
| CN104454644A (en) * | 2014-11-28 | 2015-03-25 | 德清振达电气有限公司 | High-efficiency axial flow fan |
-
2012
- 2012-11-23 CN CN 201220628892 patent/CN203098386U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373383A (en) * | 2014-11-28 | 2015-02-25 | 德清振达电气有限公司 | Efficient blade of axial fan |
| CN104454644A (en) * | 2014-11-28 | 2015-03-25 | 德清振达电气有限公司 | High-efficiency axial flow fan |
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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: 20130731 Termination date: 20141123 |
|
| EXPY | Termination of patent right or utility model |