CN103670911A - Blade of wind driven generator - Google Patents
Blade of wind driven generator Download PDFInfo
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- CN103670911A CN103670911A CN201410011088.7A CN201410011088A CN103670911A CN 103670911 A CN103670911 A CN 103670911A CN 201410011088 A CN201410011088 A CN 201410011088A CN 103670911 A CN103670911 A CN 103670911A
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- circular arc
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- impeller
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- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention provides a blade of a wind driven generator, which comprises a front edge part, an upper surface, a rear edge part, a blade root part, a blade tip part and a lower surface. The front edge part and the blade tip part are circular arc cambered surfaces; the upper surface is a curved surface; the blade root part is a circular arc cambered surface or a circle center of an impeller; the rear edge part is of a circular arc shape; and the lower surface is a curved surface or a plane. The front edge part and the blade tip part of the blade provided by the invention are the circular arc cambered surfaces, so that resistance in the rotating direction of the impeller can be reduced; the upper surface is the curved surface, so that the pressure of wind on the upper surface of the blade can be increased; the circular arc shape of the rear edge part of the blade can reduce wake flow interference; and the lower surface is the curved surface or the plane, so that the pressure of wind on the lower surface of the blade can be reduced. The invention integrally forms the high-efficiency horizontal axial lift type wind driven generator blade.
Description
Technical field
The present invention relates to the blade technology field for wind-driven generator, specifically, the present invention relates to a kind of blade of horizontal axis wind-driven generator.
Background technique
At present, wind-driven generator can be divided into horizontal axis wind-driven generator and vertical axis aerogenerator.The vane airfoil profile of horizontal axis wind-driven generator adopts aviation aerofoil profile more, take aviation aerofoil profile as main lift-type blade.In the process of rotation, its relative linear velocity is to strengthen successively from root to tip segment.In order to pursue higher lift coefficient, blade is made into that root size is large, tip size is little.But the defect causing is like this that the moment of output is less, and wind energy utilization is low.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of blade of horizontal axis wind-driven generator, can to incoming flow wind speed, process better, and the output torque of acquisition is large, and wind energy utilization is high.
For solving the problems of the technologies described above, the invention provides a kind of blade of wind-driven generator, comprise front edge, upper surface, hinder marginal part, blade root, leaf tip and lower surface, described front edge is circular arc cambered surface or camber line, described leaf tip is circular arc cambered surface, and described upper surface is curved surface, and described blade root is the center of circle of a circular arc cambered surface or impeller, described hinder marginal part is circular arc, and described lower surface is curved surface or plane.
Alternatively, the upper costa of described front edge and/or lower costa are that to take the radius 1/2R place of circumference of described impeller be the center of circle, semi-circular arc or minor arc from the circumference of described impeller to described blade root gained.
Alternatively, the radius of the circumference that the radius of the circular arc cambered surface of described leaf tip is described impeller, the arc length of described leaf tip is in 180 degree, and the circular arc cambered surface of described leaf tip combines with circular arc cambered surface or the camber line of described front edge.
Alternatively, described upper surface is to form as many horizontal circular arc camber lines and many longitudinal circular arc camber lines scannings of reference point by usining the center of circle of described impeller;
Wherein, described horizontal circular arc camber line is that to take the center of circle of described impeller or the upper extreme point of center of circle line be the center of circle, many intensive horizontal circular arc camber lines of doing between costa and described hinder marginal part on described;
Described longitudinal circular arc camber line is to many intensive longitudinal circular arc camber lines doing the center of circle of described impeller or described center of circle line by camber line on the leaf tip of described leaf tip.
Alternatively, described blade root is the central part of circular arc cambered surface or described impeller, to be the center of circle of selecting to take described impeller make the described front edge of described blade and the horizontal circular arc camber line between described hinder marginal part is line of cut as reference point in the circular arc cambered surface position of described blade root, the entity in the center of circle of excision from described line of cut to described impeller, remaining entity is blade, the cambered surface obtaining the lower surface from described line of cut to described blade is described blade root, and described blade root is connected with the wheel hub of described impeller.
Alternatively, if described lower surface is curved surface, described curved surface interweaves and scans and form with longitudinal circular arc camber line by containing horizontal circular arc camber line respectively; Take the center of circle of described impeller is reference point, described horizontal circular arc camber line is that to take the center of circle of described impeller be the center of circle, many the intensive horizontal circular arc camber lines of doing between described lower costa and described hinder marginal part, described longitudinal circular arc camber line is to many intensive longitudinal circular arc camber lines doing the center of circle of described impeller or described center of circle line by camber line under the leaf tip of described leaf tip.
Alternatively, the described upper surface that described hinder marginal part is described blade and the crossing connecting part of described lower surface, described hinder marginal part is semi-circular arc or minor arc, its arc length and described front edge equate.
Compared with prior art, the present invention has the following advantages:
The front edge of blade of the present invention and leaf tip are circular arc cambered surface, can reduce the resistance running into toward vane rotary direction; Upper surface adopts curved-surface structure, can strengthen the pressure of blade upper surface wind, can to incoming flow wind speed, carry out rectification processing better; The circular arc of the hinder marginal part of blade can reduce wake flow to be disturbed; Lower surface is curved surface or plane, the pressure of the lower surface wind of the less blade of energy.
In sum, a kind of high-effect horizontal axis lift-type blade of wind-driven generator of the whole formation of the present invention, it starts, and wind speed is low, and the output torque of acquisition is large, and wind energy utilization efficiency is high.
Accompanying drawing explanation
The above and other features of the present invention, character and advantage become more obvious by the description by below in conjunction with drawings and Examples, wherein:
Fig. 1 is the perspective view of blade of the wind-driven generator of one embodiment of the invention;
Fig. 2 is the upper surface partial sweep camber line structural representation of the blade of wind-driven generator embodiment illustrated in fig. 1;
Fig. 3 is the perspective view of blade of the wind-driven generator of another embodiment of the present invention;
Fig. 4 is the upper surface partial sweep camber line structural representation of the blade of wind-driven generator embodiment illustrated in fig. 3;
Fig. 5 is the perspective view of blade of another embodiment's of the present invention wind-driven generator.
Description of reference numerals:
1 front edge
Costa on 2
3 times costas
4 hinder marginal parts
5 upper surfaces
6 leaf tips
Camber line on 7 leaf tips
Camber line under 8 leaf tips
The maximum ga(u)ge of 9 blades
The center of circle of 10 impellers
12 trailing edge line endpoints
Leading edge line endpoints on 13
The lower extreme point of 14 vane thicknesses
15～17 longitudinal circular arc first～three end points
18～25 horizontal circular arc first～eight end points
The upper extreme point of 10 ' center of circle line
26～28 longitudinal circular arc the four～six end points
The lower extreme point of 29 center of circle lines
Embodiment
Below in conjunction with specific embodiments and the drawings, the invention will be further described; set forth in the following description more details so that fully understand the present invention; but the present invention obviously can implement with the multiple alternate manner that is different from this description; those skilled in the art can do similar popularization, deduction according to practical situations without prejudice to intension of the present invention in the situation that, therefore should be with content constraints protection scope of the present invention of this specific embodiment.
Fig. 1 is the perspective view of blade of the wind-driven generator of one embodiment of the invention.It should be noted that this and follow-up other accompanying drawing are all only as example, it is not to draw according to the condition of equal proportion, and should not using that this is construed as limiting as the protection domain to actual requirement of the present invention.As shown in Figure 1, this blade is mainly to consist of front edge 1, hinder marginal part 4, upper surface 5, lower surface (not shown), leaf tip 6 and blade root.Wherein, front edge 1 is circular arc cambered surface (can be also camber line under some situation), its be maximum ga(u)ge 9 positions from the center of circle 10 of impeller to blade along the cambered surface that forms of costa 2 and 3 scannings of lower costa.On this, costa 2 and/or this lower costa 3 can be that to take the radius 1/2R place of circumference of impeller be the center of circle, semi-circular arc or minor arc from the circumference of impeller to blade root gained.So the radius of the circular arc cambered surface of front edge 1 can be also the radius 1/2R of the circumference of impeller, such size can reduce the resistance of the wind running into toward vane rotary direction.The upper surface 5 that this hinder marginal part 4 is blade and the crossing connecting part of lower surface, hinder marginal part 4 can be semi-circular arc or minor arc, its arc length and front edge 1 equate, are mainly to reduce blade resistance and wake flow interference.Blade root can or be center of circle 10(Fig. 1, Fig. 2 of impeller for a circular arc cambered surface (Fig. 3, Fig. 4)).
The leaf tip 6 of blade is circular arc cambered surface, the radius of the circumference that the radius of its circular arc cambered surface is impeller, and the arc length of leaf tip 6, in 180 degree, can not be greater than 180 degree.The circular arc cambered surface of leaf tip 6 is that the front edge 1 along camber line 8 under camber line 7 on leaf tip and leaf tip to blade scans and forms from small to large by trailing edge line endpoints 12.The circular arc cambered surface of leaf tip 6 combines with the circular arc cambered surface (or camber line) of front edge 1, the maximum ga(u)ge 9 that both joint lines are blade.The upper leading edge line endpoints 13(that the maximum ga(u)ge 9 of blade must be more than or equal to blade also can think the upper extreme point of vane thickness) and the trailing edge line endpoints 12 of blade between height.On the leaf tip of blade, camber line 7 is determining the incoming flow angle of attack of the upper surface 5 of blade, and the circular arc cambered surface of leaf tip 6 mainly plays to be improved blade tip air-flow and better flow out.
The upper surface 5 of blade is curved surface, and it is to form as many horizontal circular arc camber lines (or curve) of reference point and many longitudinal circular arc camber lines (or curve) scanning by usining the center of circle 10 of impeller.Wherein, laterally circular arc camber line can be to take the center of circle 10(of impeller or the upper extreme point 10 ' of the center of circle line shown in Fig. 4) be the center of circle, many of work intensive horizontal circular arc camber lines between the upper costa 2 of blade and hinder marginal part 4.On leaf tip, camber line 7 is also a horizontal circular arc camber line.And longitudinally circular arc camber line can be to the center of circle 10(of impeller or the center of circle line shown in Fig. 4 by camber line 7 on the leaf tip of leaf tip 6) many intensive longitudinal circular arc camber lines of work.Upper costa 2 and hinder marginal part 4 are all longitudinal circular arc camber line.
Fig. 2 is the upper surface partial sweep camber line structural representation of the blade of wind-driven generator embodiment illustrated in fig. 1.As shown in Figure 2, take the center of circle 10 of impeller is reference point, from the center of circle 10 of impeller to the end points 12 of trailing edge line, leading edge line endpoints 13, longitudinally circular arc the first end points 15, longitudinally circular arc the second end points 16 and circular arc camber line that longitudinally circular arc the 3rd end points 17 done respectively, be all aforesaid longitudinal circular arc camber line.Similarly, take the center of circle 10 of impeller is reference point, from horizontal circular arc the first end points 18 to horizontal circular arc the second end points 19, from horizontal circular arc the 3rd end points 20 to horizontal circular arc the 4th end points 21, from horizontal circular arc five terminal point 22 to horizontal circular arc the 6th end points 23 and the circular arc camber line done respectively to horizontal circular arc the 8th end points 25 from horizontal circular arc the 7th end points 24, be all aforesaid horizontal circular arc camber line.
In addition, the lower surface of blade (not shown) can be curved surface or plane.If lower surface is curved surface, this curved surface can be respectively by usining the center of circle 10 of impeller as the horizontal circular arc camber line of reference point and longitudinally interweave scanning and forming of circular arc camber line.Take the center of circle 10 of impeller is reference point, and laterally circular arc camber line is the 10Wei center of circle, the center of circle with impeller, many intensive horizontal circular arc camber lines of doing between the lower costa 3 of blade and hinder marginal part 4, and under leaf tip, camber line 8 is also a horizontal circular arc camber line.And longitudinally circular arc camber line is to the center of circle 10(of impeller or the center of circle line shown in Fig. 4 by camber line 8 under the leaf tip of leaf tip 6) many intensive longitudinal circular arc camber lines of work.Descend between costa 3 and hinder marginal part 4 is longitudinal circular arc camber line.Lower surface through aforementioned lateral circular arc camber line with the blade that longitudinally scanning of circular arc camber line forms, the pressure of wind is smaller, is conducive to wind wheel and under the pressure of upper surface 5 place's wind, drives wind wheel rotation.
Therefore, the blade upper surface forming with horizontal circular arc camber line (or curve) and longitudinal circular arc camber line (or curve) scanning, can make blade obtain the pressure of more incoming flow wind speed, can make wind be added in better on the track of wind wheel circumference simultaneously, increase circumference spinning force, improve lift coefficient.
In the present invention, the blade root of blade is except being the central part (center of circle of impeller) of impeller, and it can be also a circular arc cambered surface.Fig. 3 is the perspective view of blade of the wind-driven generator of another embodiment of the present invention; Fig. 4 is the upper surface partial sweep camber line structural representation of the blade of wind-driven generator embodiment illustrated in fig. 3.The present embodiment is continued to use element numbers and the partial content of previous embodiment, wherein adopts identical label to represent identical or approximate element, and has optionally omitted the explanation of constructed content.Visible, and Fig. 1 and embodiment illustrated in fig. 2 between difference be that the center of impeller becomes center of circle line (from upper extreme point 10 ' to lower extreme point 29) from the center of circle 10 of blade.Increased like this area of the upper surface of impeller central part, can make blade obtain the pressure of more incoming flow wind speed.
Incorporated by reference to Fig. 3 and Fig. 4, come together to understand, can to be the center of circle 10 of selecting to take impeller make the front edge 1 of blade and the horizontal circular arc camber line between hinder marginal part 4 at upper surface 5 as reference point in the circular arc cambered surface position of blade root, selecting one is line of cut, the entity part in the center of circle 10 of excision from this line of cut to impeller, the blade of remaining entity part for needing, the cambered surface obtaining between the lower surface from line of cut to blade is blade root, and blade root is connected with the wheel hub of impeller.
For example, selection from horizontal circular arc the 7th end points 24 to the circular arc camber line that horizontal circular arc the 8th end points 25 is done be line of cut, the center of circle from this circular arc camber line to impeller 10 is excision position, this circular arc camber line is exactly the blade root of blade to the cambered surface between the lower surface of blade, and remaining entity part is exactly required blade.Blade root is installed and is connected on the wheel hub of impeller.No matter select which type of position as blade root, the leaf tip of blade is all wide length, and blade root is all short narrow.Blade from leaf tip to blade root, be by wide length gradually to short narrow, can make blade obtain and be subject to more moment, the starting wind velocity of wind wheel is little.
Fig. 5 is the perspective view of blade of another embodiment's of the present invention wind-driven generator.The present embodiment is continued to use element numbers and the partial content of previous embodiment, wherein adopts identical label to represent identical or approximate element, and has optionally omitted the explanation of constructed content.As shown in Figure 5, the camber line that the front edge of blade is combined by upper surface 5 and lower surface forms, and is also just equal to costa 2.The radius 1/2R of the circumference that the radius of the upper costa 2 of blade and the circular arc camber line of hinder marginal part 4 is impeller.The upper extreme point 10 ' of center of circle line of take is the center of circle, in upper leading edge line endpoints 13 to making a curve making progress (on leaf tip, camber line 7) and a downward curve (under leaf tip, camber line 8) between trailing edge line endpoints 12.On this leaf tip, the curve radian of camber line 7 must be lower than upper costa 2; Under this leaf tip, the curve radian of camber line 8 must be higher than hinder marginal part 4.Like this, the leading edge portion of blade and the resistance of tip segment will be very little, increase the rotating force of wind wheel.
In addition, 5 of the upper surfaces of blade are formed by longitudinal circular curve scanning to the horizontal circular curve of the center line (center of circle line) of impeller and upper costa 2, hinder marginal part 4 by camber line 7 on the leaf tip of leaf tip.By camber line under leaf tip 8, the center line (center of circle line) to impeller forms along upper costa 2 and hinder marginal part 4 scannings the lower surface of blade.Like this, at the pressure of impeller upper surface increase incoming flow wind, reduce the pressure of lower surface simultaneously, the efficiency of wind wheel is improved greatly.
In sum, the front edge of blade of the present invention and leaf tip adopt circular arc cambered surface, can reduce the resistance running into toward vane rotary direction; Upper surface adopts curved-surface structure, can strengthen the pressure of blade upper surface wind, can to incoming flow wind speed, carry out rectification processing better; The circular arc of the hinder marginal part of blade can reduce wake flow to be disturbed; Lower surface is curved surface or plane, the pressure of the lower surface wind of the less blade of energy.
A kind of high-effect horizontal axis lift-type blade of wind-driven generator of the whole formation of the present invention, it starts, and wind speed is low, and the output torque of acquisition is large, and wind energy utilization efficiency is high.
Although the present invention with preferred embodiment openly as above, it is not for limiting the present invention, and any those skilled in the art without departing from the spirit and scope of the present invention, can make possible change and modification.Therefore, every content that does not depart from technical solution of the present invention, any modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, within all falling into the protection domain that the claims in the present invention define.
Claims (7)
1. the blade of a wind-driven generator, comprise front edge (1), upper surface (5), hinder marginal part (4), blade root, leaf tip (6) and lower surface, it is characterized in that, described front edge (1) is circular arc cambered surface or camber line, described leaf tip (6) is circular arc cambered surface, and described upper surface (5) is curved surface, and described blade root is the center of circle (10) of a circular arc cambered surface or impeller, described hinder marginal part (4) is circular arc, and described lower surface is curved surface or plane.
2. the blade of wind-driven generator according to claim 1, it is characterized in that, the upper costa (2) of described front edge (1) and/or lower costa (3) are that to take the radius 1/2R place of circumference of described impeller be the center of circle, semi-circular arc or minor arc from the circumference of described impeller to described blade root gained.
3. the blade of wind-driven generator according to claim 2, it is characterized in that, the radius of the circumference that the radius of the circular arc cambered surface of described leaf tip (6) is described impeller, the arc length of described leaf tip (6) is in 180 degree, and the circular arc cambered surface of described leaf tip (6) combines with circular arc cambered surface or the camber line of described front edge (1).
4. the blade of wind-driven generator according to claim 3, is characterized in that, described upper surface (5) is to form as many horizontal circular arc camber lines and many longitudinal circular arc camber lines scannings of reference point by usining the center of circle (10) of described impeller;
Wherein, described horizontal circular arc camber line is that to take the center of circle (10) of described impeller or the upper extreme point (10 ') of center of circle line be the center of circle, many intensive horizontal circular arc camber lines of doing between costa (2) and described hinder marginal part (4) on described;
Described longitudinal circular arc camber line is to many intensive longitudinal circular arc camber lines doing the center of circle (10) of described impeller or described center of circle line by camber line (7) on the leaf tip of described leaf tip (6).
5. the blade of wind-driven generator according to claim 4, it is characterized in that, described blade root is the central part of circular arc cambered surface or described impeller, to be the center of circle (10) of selecting to take described impeller make the described front edge (1) of described blade and the horizontal circular arc camber line between described hinder marginal part (4) is line of cut as reference point in the circular arc cambered surface position of described blade root, the entity in the center of circle (10) of excision from described line of cut to described impeller, remaining entity is blade, and the cambered surface obtaining the lower surface from described line of cut to described blade is described blade root.
6. the blade of wind-driven generator according to claim 5, is characterized in that, if described lower surface is curved surface, described curved surface interweaves and scans and form with longitudinal circular arc camber line by containing horizontal circular arc camber line respectively; Take the center of circle (10) of described impeller is reference point, described horizontal circular arc camber line is that to take the center of circle (10) of described impeller be the center of circle, many the intensive horizontal circular arc camber lines of doing between described lower costa (3) and described hinder marginal part (4), described longitudinal circular arc camber line is to many intensive longitudinal circular arc camber lines doing the center of circle (10) of described impeller or described center of circle line by camber line (8) under the leaf tip of described leaf tip (6).
7. the blade of wind-driven generator according to claim 6, it is characterized in that, the described upper surface (5) that described hinder marginal part (4) is described blade and the crossing connecting part of described lower surface, described hinder marginal part (4) is semi-circular arc or minor arc, its arc length and described front edge (1) equate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410011088.7A CN103670911B (en) | 2014-01-09 | 2014-01-09 | The blade of wind-driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410011088.7A CN103670911B (en) | 2014-01-09 | 2014-01-09 | The blade of wind-driven generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103670911A true CN103670911A (en) | 2014-03-26 |
| CN103670911B CN103670911B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410011088.7A Expired - Fee Related CN103670911B (en) | 2014-01-09 | 2014-01-09 | The blade of wind-driven generator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4368007A (en) * | 1980-10-10 | 1983-01-11 | Ely Walter K | Fluid driven turbine |
| CN201144761Y (en) * | 2007-12-28 | 2008-11-05 | 赵士明 | Tower type wind wheel |
| CN201202587Y (en) * | 2008-05-30 | 2009-03-04 | 霍华山 | Wind power generator wind wheel |
| KR20120031621A (en) * | 2010-09-27 | 2012-04-04 | 이달은 | Manufacturing method and rotor blade using lift frorce and drag for wind turbine |
| CN102996330A (en) * | 2011-09-13 | 2013-03-27 | 通用电气公司 | Rotor blade assembly for wind turbine |
-
2014
- 2014-01-09 CN CN201410011088.7A patent/CN103670911B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4368007A (en) * | 1980-10-10 | 1983-01-11 | Ely Walter K | Fluid driven turbine |
| CN201144761Y (en) * | 2007-12-28 | 2008-11-05 | 赵士明 | Tower type wind wheel |
| CN201202587Y (en) * | 2008-05-30 | 2009-03-04 | 霍华山 | Wind power generator wind wheel |
| KR20120031621A (en) * | 2010-09-27 | 2012-04-04 | 이달은 | Manufacturing method and rotor blade using lift frorce and drag for wind turbine |
| CN102996330A (en) * | 2011-09-13 | 2013-03-27 | 通用电气公司 | Rotor blade assembly for wind turbine |
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| CN103670911B (en) | 2016-01-13 |
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