CN102913481A - Axial flow fan impeller blade comprising double auxiliary wings - Google Patents
Axial flow fan impeller blade comprising double auxiliary wings Download PDFInfo
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- CN102913481A CN102913481A CN2012100280041A CN201210028004A CN102913481A CN 102913481 A CN102913481 A CN 102913481A CN 2012100280041 A CN2012100280041 A CN 2012100280041A CN 201210028004 A CN201210028004 A CN 201210028004A CN 102913481 A CN102913481 A CN 102913481A
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Abstract
The invention relates to a generally axial flow fan impeller blade. The impeller blade is formed by combining an auxiliary wing at an eddy-eliminating arc end, the auxiliary wing on a flow-guide arc side and a front-bent sweepforward blade body, wherein the maximum cross section lift coefficient Cy of the curved surface of the blade is obtained according to the design of variable circular rectors, and an optimized fan parameter is also obtained. The impeller blade is characterized in that a blade having the maximized aerodynamic characteristic is formed by the double auxiliary wings and the front-bent sweepforward blade body, thereby being suitable for axial flow fans of the systems with different aerodynamic characteristics. As a result, the operation efficiency of the axial flow fan is improved, the energy conservation and the emission reduction are realized, 20% of electric energy on average is saved, and 30% of materials is saved. Therefore, the impeller blade meets the requirements of different specifications of the axial flow fans with material and energy saving effects.
Description
Affiliated technical field;
Patent of the present invention relates to common shaft flow fan impeller blade, be specifically related to a kind of by be combined the blade formed with the front bended sweepforward blade body except the auxiliary wing of eddy current garden arc end and the auxiliary wing of water conservancy diversion garden arc side, for province's material, the energy-saving axial flow blower fan of different size, belong to the ventilation equipment in fluid engineering field.
Technical background;
In recent years, all kinds of efficient, energy-saving axial flow Fan Products of international, domestic-developed are also put on market, still exist operational efficiency low, and the drawback of power wastage, can not meet the requirement that national energy-saving reduces discharging.At present conventional blower fan is by the ventilation system classificating requirement, determine and manufacture the blower fan aerodynamic parameter, known fan impeller blade aerofoil profile is that general NACA2412 (U.S.), LS (English) propeller aerofoil profile, brother's Dettingen (moral) 622-682 leaf grating aerofoil profile of employing recommendation is sample for reference.
To the middle-size and small-size axial-flow blower of high volume applications, adopt through the thin plate garden of optimal design arc structure economics type blade, still there is eddy current in such thin plate blade, and circumferentially laminar flow loss is low to efficiency, causes the electric energy consume.
For maximizing the aerodynamic characteristic that improves the common shaft flow fan, blade of the present invention, be combined and form with the front bended sweepforward blade body by removing the auxiliary wing of eddy current garden arc end and the water conservancy diversion garden auxiliary wing of arc side.
Described blade adopts the NACA2412 airfoil camber, obtains maximum cross-section lift coefficient Cy by becoming the circular rector design, and obtains the fan parameter of optimizing.Impeller blade feature of the present invention is that two auxiliary wings and front bended sweepforward blade body form the blade that maximizes aerodynamic characteristic, can meet and improve fan efficiency, realize energy-saving and emission-reducing, for province's material, the energy-saving fan requirement of different size.
Content of the present invention is;
The objective of the invention is for the deficiencies in the prior art, a kind of energy-saving fan blade by forming except the auxiliary wing of eddy current garden arc end and the auxiliary wing of water conservancy diversion garden arc side and antecurvature front wing blade body is provided, improve axial-flow blower efficiency, realize the energy-saving and emission-reducing requirement, meet medium and small flow fan innovation replacement demand in enormous quantities.
For realizing above-mentioned target, the energy-saving fan blade characteristic except the auxiliary wing of eddy current garden arc end and the auxiliary wing of water conservancy diversion garden arc side and front bended sweepforward blade body formation that the present invention adopts is;
The present invention in addition to the blade tip vortex Park auxiliary wing arc action; remove the blade tip vortex region, the resistance was reduced by 10% and reduce aerodynamic noise, wind tunnel authentication via the airflow from the leaf end face 0.2 * b, the camber angle μ = 38 when °, the vortex is not significant, and therefore the arc in addition to auxiliary wing tip vortex Park high (δH <sub TranNum="52"> 1 </ sub>) is less than 0.2 * b.
Blade body of the present invention adopts the front bended sweepforward blade profile and with reference to the NACA2412 aerofoil profile; By the effect of the centripetal radial force of forward curved vane, the leaf top gas flows to the blade middle part assembles, and the acting ability in this zone is increased, and has reduced the loss of blade surface secondary gas flow; Spoon of blade is less than t/b≤12% with reference to NACA2412 camber h/b=2%, relative thickness and determines the original shape curved surface.
The plain edition impeller all by centrifugal force controlled, causes the blade zone of mainly doing work to move and increase end eddy current loss to leaf top direction due to whole leaf height.
The auxiliary wing effect of water conservancy diversion of the present invention garden arc side; Effectively improve the blade root gas flow, reduce pneumatic noise.
The arc side auxiliary wing in water conservancy diversion garden calculates reference;
High (the δ H of the auxiliary wing of side
2)=b*4%; Through the wind-tunnel checking, improve under the prerequisite of air quantity 12%, can significantly reduce the aerodynamic noise 4-6db (A) of fan;
The auxiliary wing height of side δ H
2(δ Cy-) is with reference to formula; δ H
2=4.95 (δ Cy)
2+ 1.108 (δ Cy)-0.0215;
Wherein, δ H
2---the height of the auxiliary wing of side; %, δ Cy---lift coefficient increasing amount; B-leaf profound wide (mm)
To sum up state; The compages feature of vane airfoil profile reaches, the arc side auxiliary wing in water conservancy diversion garden reduces along blade face peripheral flow loss, except the auxiliary wing of eddy current garden arc end, eliminates eddy current loss, on average saves electric energy 20%, saves material 30%, for the axial-flow blower of different size, realize blower fan material-saving, energy-conservation purpose.
Blade material of the present invention can be used alloy-steel plate, aluminum alloy, glass fibre reinforced plastics and engineering plastics, manufactures the ventilation unit of the different aerodynamic characteristics of different ventilation systems.
The accompanying drawing explanation:
Shown in Fig. 1, Fig. 2, Fig. 3, except the fan blade of the arc end auxiliary wing in eddy current garden with the water conservancy diversion garden arc side auxiliary wing and front bended sweepforward blade body formation, this combined blade by; (1) the auxiliary wing of water conservancy diversion garden arc side, (2) are except the auxiliary wing of eddy current garden arc end, the three-dimensional garden of (3) front bended sweepforward arc blade body, formation.
Shown in Fig. 4, Fig. 5 in complete machine embodiment; In wheel hub list blade welding body; (4) wheel hub,
(1) the auxiliary wing of water conservancy diversion garden arc side, (2) are except the auxiliary wing of eddy current garden arc end, the three-dimensional garden of (3) front bended sweepforward arc blade body, formation.
Fig. 6, Fig. 7, Fig. 8 complete machine of the present invention; Blower fan consists of blower fan urceolus (5), fan motor impeller assembly (6);
The specific embodiment of the invention;
Below in conjunction with embodiment and accompanying drawing, technological scheme of the present invention is described in further detail.
Impeller blade of the present invention, form by removing the auxiliary wing of eddy current garden arc end and the auxiliary wing of water conservancy diversion garden arc side and front bended sweepforward blade body, as shown in Figure 1.
In Fig. 1, (1) be the auxiliary wing of water conservancy diversion garden arc side, (2) for except the auxiliary wing of eddy current garden arc end, (3) for the three-dimensional garden of front bended sweepforward arc blade body, by sheet stamping (or; Injection moulding, stretching) the moulding manufacture.
The auxiliary wing of (1) water conservancy diversion garden arc side of described impeller blade as shown in Figure 1, shown in Figure 5, its effect; Can effectively improve the blade root gas flow, reduce pneumatic noise.
The calculating of the auxiliary wing height of water conservancy diversion garden arc side is with reference to formula;
High (the δ H of the auxiliary wing of side
2)=b*4%; Through the wind-tunnel checking, improve under the prerequisite of air quantity 12%, can significantly reduce the aerodynamic noise 4-6db (A) of fan;
The auxiliary wing height of side δ H
2(δ Cy-) is with reference to formula; δ H
2=4.95 (δ Cy)
2+ 1.108 (δ Cy)-0.0215;
Wherein, δ H
2---the height of the auxiliary wing of side; %, δ Cy---lift coefficient increasing amount; B-leaf profound wide (mm).
(2) of described impeller blade are except the auxiliary wing of eddy current garden arc end, as shown in Figure 1, shown in Figure 5, except the auxiliary wing effect of eddy current garden arc end; Remove end of blade zone eddy current, reduce aerodynamical resistance and reach 10%, and reduce aerodynamic noise.
Validated by wind tunnel, the air from the leaf end face 0.2 * b, camber μ = 38 °, the vortex is not significant, and therefore the arc in addition to auxiliary wing tip vortex Park High (δH <sub TranNum="88"> 1 </ sub>) is less than 0.2 * b.
The three-dimensional garden of (3) front bended sweepforward of described impeller blade arc blade body, as shown in Fig. 1, Fig. 3, Fig. 4; Blade face adopts front bended sweepforward blade profile and cross section curve a-b with reference to the NACA2412 aerofoil profile; Its effect is;
The effect of the centripetal radial force of forward curved vane, the leaf top gas flows to the blade middle part assembles, and the acting ability in this zone is increased, and has reduced the loss of blade surface secondary gas flow; Spoon of blade is with reference to the NACA2412 aerofoil profile, and its camber h/b=2%, relative thickness are less than the selected original shape curved surface of t/b≤12%.
The plain edition impeller blade, due to whole leaf height all by centrifugal force controlled, cause blade mainly do work the zone move and increased end eddy current loss to leaf top direction.
Embodiments of the invention, as shown in Fig. 6, Fig. 7, Fig. 8, are axial-flow blower complete machine and impeller assembly figure.
The axial-flow blower of producing by the present invention, on average save electric energy 20%, saves material 30%, and different size blower fan of the present invention, for various ventilation systems, improves fan operation efficiency, meets the energy-saving ventilation system requirement.
Claims (4)
1. the axial flow fan vane wheel blade formed by two auxiliary wings;
It is characterized in that; Axial-flow fan blade, be combined and form blade with the front bended sweepforward blade body by removing the auxiliary wing of eddy current garden arc end and the water conservancy diversion garden auxiliary wing of arc side, except the auxiliary wing of eddy current garden arc end and arc side Fu Yi garden, water conservancy diversion garden cambered surface, along the blade body face, tangentially connect, pneumatic acting ability increases, and has reduced the loss of blade surface secondary gas flow, except arc Duan Fuyi garden, eddy current garden cambered surface reduces the eddy current consume, arc side Fu Yi garden, water conservancy diversion garden cambered surface reduces circumferential laminar flow loss, with blade body complete blade.
2. according to claims 1, as to be formed by two auxiliary wings axial-flow fan blade;
It is characterized in that; Except arc end Fu Yi garden, eddy current garden cambered surface, radially along blade garden cambered surface, tangentially connect, pneumatic acting ability increases, and has reduced the loss of blade surface secondary gas flow, removes eddy current garden arc Duan Fuyi garden cambered surface and blade and is integrally formed.
3. according to claims 1, as to be formed by two auxiliary wings axial-flow fan blade;
It is characterized in that; The auxiliary wing of water conservancy diversion garden arc side, circumferentially be integrally formed along tangential the connection with blade of blade garden cambered surface, and the garden cambered surface reduces circumferential laminar flow loss, improves the blade root gas flow, reduces pneumatic noise.
4. according to claims 1, as to be formed by two auxiliary wings axial-flow fan blade;
It is characterized in that; Blade material of the present invention can be used alloy-steel plate, aluminum alloy, glass fibre reinforced plastics and engineering plastics, manufactures the ventilation unit of the different aerodynamic characteristics of different ventilation systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100280041A CN102913481A (en) | 2012-01-16 | 2012-01-16 | Axial flow fan impeller blade comprising double auxiliary wings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100280041A CN102913481A (en) | 2012-01-16 | 2012-01-16 | Axial flow fan impeller blade comprising double auxiliary wings |
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| CN102913481A true CN102913481A (en) | 2013-02-06 |
Family
ID=47611993
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100280041A Pending CN102913481A (en) | 2012-01-16 | 2012-01-16 | Axial flow fan impeller blade comprising double auxiliary wings |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224166A (en) * | 2016-08-29 | 2016-12-14 | 姜志敏 | A kind of temperature difference electricity generation device |
| CN106286346A (en) * | 2016-09-30 | 2017-01-04 | 依必安派特风机(上海)有限公司 | A kind of axial fan |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2417314Y (en) * | 1998-12-05 | 2001-01-31 | 刘志忠 | Ceiling fan using out rotating motor and it central axle as wind pass |
| CN2733049Y (en) * | 2004-10-28 | 2005-10-12 | 廖金海 | Radiating fan applied in radiator |
| CN201258874Y (en) * | 2008-07-23 | 2009-06-17 | 江苏富丽华通用设备有限公司 | Fan blade in axial fan |
| CN101956729A (en) * | 2010-06-03 | 2011-01-26 | 深圳市傲星泰科技有限公司 | Fan |
-
2012
- 2012-01-16 CN CN2012100280041A patent/CN102913481A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2417314Y (en) * | 1998-12-05 | 2001-01-31 | 刘志忠 | Ceiling fan using out rotating motor and it central axle as wind pass |
| CN2733049Y (en) * | 2004-10-28 | 2005-10-12 | 廖金海 | Radiating fan applied in radiator |
| CN201258874Y (en) * | 2008-07-23 | 2009-06-17 | 江苏富丽华通用设备有限公司 | Fan blade in axial fan |
| CN101956729A (en) * | 2010-06-03 | 2011-01-26 | 深圳市傲星泰科技有限公司 | Fan |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224166A (en) * | 2016-08-29 | 2016-12-14 | 姜志敏 | A kind of temperature difference electricity generation device |
| CN106286346A (en) * | 2016-09-30 | 2017-01-04 | 依必安派特风机(上海)有限公司 | A kind of axial fan |
| CN106286346B (en) * | 2016-09-30 | 2019-11-08 | 依必安派特风机(上海)有限公司 | A kind of axial fan |
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Application publication date: 20130206 |