CN103939276A - Wind turbine vane - Google Patents
Wind turbine vane Download PDFInfo
- Publication number
- CN103939276A CN103939276A CN201310022301.XA CN201310022301A CN103939276A CN 103939276 A CN103939276 A CN 103939276A CN 201310022301 A CN201310022301 A CN 201310022301A CN 103939276 A CN103939276 A CN 103939276A
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- CN
- China
- Prior art keywords
- wind turbine
- blade
- turbine blade
- torsion
- vane
- 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.)
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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
Abstract
The invention relates to a wind turbine vane. The length of the wind turbine vane is larger than 49.9 meters and smaller than 50.9 meters, such as 50.5 meters, and the relative length of the vane is one. The wind turbine vane further comprises a vane root end part and a tip end part, the wind turbine vane comprises an overall aerodynamic shape structure which comprises a plurality of sections (cross sections) of the aerodynamic shape, and the sections are at least determined by section thicknesses, wing chords and torsion. The wind turbine vane is provided with a set of specific torsion being +/-10% at the position with a specific relative distance away from the root end part of the vane. The wind turbine vane with above torsion has various advantages, the requirement of the wind turbine vane with the efficient wind power generation capacity is met, and meanwhile the vane can lower fatigue loads due to the fact that the composition of the torsion in the length direction of the vane is the best.
Description
Technical field the present invention relates to a kind of wind turbine blade, its length is greater than 49.9 meters and be less than 50.9 meters, for example 50.5 meters, the relative length of described blade is 1, described wind turbine blade further comprises blade root end and point, described wind turbine blade comprises overall aerodynamic shape, and this aerodynamic shape comprises the section (cross section) of several aerodynamic shape, and these sections are by least sectional thickness, wing chord and torsion are determined.The invention further relates to a kind of wind turbine, it comprises at least two, preferably three described wind turbine blades.
Background technique
In the process of wind turbine operation, because blade rotates under aerodynamic effect, the radicle of wind turbine blade bears huge load.This fatigue loads produces sizable stress and strain in wind turbine structure, and the requirement of strength of the material for turbo machine structure, reinforcement etc. is designed to restriction significantly.Therefore, develop specific wind turbine design, this is favourable, and it can reduce this load, for overall wind turbine structure provides the design reducing restriction.
As time goes on, many different wind turbine blades are designed, and use in the world.But people still wish to develop blade more effective, that even more optimize, makes on market existing wind turbine blade more effective.
Goal of the invention
An object of the present invention is, a kind of wind turbine blade and relevant wind turbine are provided, it has further improved the effect of wind turbine running.
Another object of the present invention is, a kind of wind turbine blade is provided, and in the time that the fatigue loads of reduction is provided, it is more effective, is can operate or controllable simultaneously.
Summary of the invention
As mentioned above, the present invention relates to a kind of wind turbine blade, its length is greater than 49.9 meters and be less than 50.9 meters, for example 50.5 meters, the relative length of described blade is 1, and described wind turbine blade further comprises blade root end and point, and described wind turbine blade comprises overall aerodynamic shape, this aerodynamic shape comprises the section (cross section) of several aerodynamic shape, and these sections are by least sectional thickness, wing chord and torsion are determined.
Wind turbine blade according to the present invention has:
-be 0.06 place from described blade root end relative distance, torsion is 27.93 degree ± 10%;
-be 0.20 place from described blade root end relative distance, torsion is 15.04 degree ± 10%;
-be 0.41 place from described blade root end relative distance, torsion is 4.02 degree ± 10%.
The wind turbine blade with torsion as above has many advantages, meet the requirement of the wind turbine blade of the efficient ability with wind-power electricity generation, simultaneously this blade can reduce fatigue loads, because be best along the formation of the torsion of length of blade direction.
Reverse with degree, 0 degree torsion and 0 degree vane change device and weigh, the wing chord of concrete aerodynamic profile is parallel with rotor plane.Positive torsion, then leading edge turns in face of wind, as shown in Figure 6.
During in particular for low wind speed region, at the hub height place of turbo machine, its average of the whole year wind speed is lower than 6.5,6,5.5,5,4.5,4 or even lower than 3.5 meter per seconds, now blade of the present invention has advantage with respect to blade well known in the prior art.Advantage except other is that the every cost unit of wind turbine has obviously higher Energy output.This fact has caused wind turbine blade of the present invention more favourable, because the overall result of blade design is, compared with the design of prior art Leaf, has produced the more cheap and scheme of antifatigue more.
So far, only, at the hub height place of turbo machine, average of the whole year wind speed is set up wind turbine higher than the region of 6 meter per seconds, and this is very general thing.Because main purpose of the present invention is, for can be at annual mean wind speed lower as obtain wind energy lower than the region of 6 meter per seconds, the design of blade is revised, meet now the requirement of high-efficiency blade, its compared with known blade structure, more cheap and endurance more.
According to the combination of the design parameter of geometry designs of the present invention, produce the design of global optimization, it is particularly useful for, for example the low wind speed market of China.
Can comprise torsion according to wind turbine blade of the present invention, its tolerance is ± 7.5%, ± 5%, ± 2.5% or even ± 0%.The described tolerance of twist can be selected according to specific requirement.But, should be appreciated that, more responsive for tolerance for the blade of relatively low wind speed design, therefore, alap tolerance will obtain the most efficient blade.
In the preferred embodiment of the present invention, the bolt circle diameter of wind turbine blade of the present invention is 1800 millimeters.For the blade that is designed for above-mentioned average of the whole year wind speed, in the time relating to structural strength, quality and overall performance, the bolt circle diameter of 1800 millimeters is the most effective.
Wind turbine blade according to the present invention comprises: be positioned at blade root end, for the hole of 64 groups of securing meanss.Described hole can comprise the Steel Sleeve being arranged on blade longitudinal direction, or hole can be arranged on the longitudinal direction of blade, wherein said hole is with to be arranged on second group of hole in the wall of described blade root end corresponding, and wherein said second group of hole is vertical with first group of hole.Second group of hole can comprise one group of sleeve pipe, and this sleeve pipe and securing means interact, for fastening described blade, to for example wheel hub and/or to pitch bearing or other constitutional details.
According to the present invention, wind turbine blade is mainly prepared from by the glass fibre of embedded rings epoxy resins.
The present invention further comprises a kind of wind turbine, and it comprises at least two, is preferably three above-mentioned wind turbine blades.
The advantage of this wind turbine is, has the rated output power of 1.6 megawatt ± 15%, and the wind turbine with blade described above and this output power is particularly useful for low wind speed region.
Brief description of the drawings
Only in embodiment's mode with reference to accompanying drawing, embodiments of the present invention are described, wherein:
Fig. 1 has shown the wind turbine with three blades.
Fig. 2 has shown the profile of the multiple aerofoil sections in wind turbine blade.
Fig. 3 has shown the wing profile of the wing chord representing with lines.
Fig. 4 has shown the wing profile that represents thickness with lines.
Fig. 5 has shown the profile of wind turbine blade.
Fig. 6 has shown three aerofoil sections with different twists.
Reference numerals list:
1-wind turbine
2-pylon
3-cabin
4-wheel hub
5-wind turbine blade
6-aerofoil section/section
7-vane tip portion
8-radicle
9-maximum wing chord length
10-wing chord-chord line
11-leading edge
12-trailing edge
13-thickness-relative contour
14-longitudinal axis
15-0 degree torsion line
Embodiment
As seen from Figure 1, wind turbine 1 comprises pylon 2 and the cabin 3 at described pylon 2 tops.In the one end in cabin 3, wheel hub 4 is located on not shown main shaft.Three wind turbine blades 5 are installed on wheel hub 4.
Fig. 2 has shown the profile of multiple aerofoil sections 6 of wind turbine blade 5.The wind turbine blade of Fig. 2 is bending, and in this way, in the time that blade 5 is installed, vane tip portion 7 points to the direction away from pylon 2, towards wind.Such a blade is also referred to as bending or prebuckling wind turbine blade 5.
The illustrated object of this figure is that wind turbine blade 5 comprises some difform cross sections or aerofoil profile 6.
Fig. 2 shows 7 blades of seeing 5 that (are also tip) from radicle 8 towards vane tip portion.At radicle 8, this section is approximately circle, very thick, from radicle 8 one segment distance places, and visible maximum wing chord length 9, at maximum wing chord length place, blade 5 is the widest, and then wing chord length and sectional thickness reduce, and become more and more less towards vane tip portion 7.
As seen from Figure 3, aerofoil profile 6 has the chord line 10 that extends to trailing edge 12 from leading edge 11.Term leading edge 11 and trailing edge 12 are known terms, and those skilled in the art of design wind turbine blade 5 is very familiar to these.
Therefore, wing chord 10 is general and known parameters, and it can calculate from the each aerofoil profile 6 shown in Fig. 2.According to the structure of wind turbine blade 5 and aerodynamics, calculate the length of the wing chord 10 of concrete wing profile very meticulously, highland promotes as far as possible, structural load is favourable in floor level simultaneously to make it.
Fig. 4 illustrates another blade parameter with lines as seen, represents the thickness 13 of special air dynamics section 6.Calculated thickness 13 equally meticulously, because in the time relating to the aerodynamic performance of blade 5 and structural behaviour, this is extremely important.Therefore,, for wind turbine blade 5, especially for wind turbine blade of the present invention, the thickness of the length of wing chord 10 and section 6 is all very important parameter; Because this blade is for having the region of relatively low annual mean wind speed, in these regions, even the very little variation of wind turbine blade 5 also can cause its efficiency lower.
Fig. 5 has shown the profile of the wind turbine blade with the longitudinal axis 14, wherein dots three different aerofoil profiles 6 ', 6 ", 6 " '.Each aerofoil profile 6 has wing chord 10 ', 10 ", 10 " '.
In Fig. 6, as seen in fig. 5, along visible identical three the different aerofoil profiles 6 ', 6 of axle 14 ", 6 " ' and wing chord 10 ', 10 ", 10 " '.Clearly visible in this figure, aerofoil profile 6 ', 6 ", 6 " ' relative to each other reverse, and reverse with respect to 0 degree torsion line 15.Similarly, in the time relating to the efficiency of wind turbine blade 5, this parameter is very important, and in the time that wind turbine 1 is based upon foregoing low wind speed region, this parameter is even more important.
The torsion of various specific aerofoil profile is according to wind speed and other calculation of parameter, the most probable angle attacking to obtain the wind relevant to blade, and at the relative velocity of special position in a longitudinal direction.
The present invention is not limited to mode of execution as described herein, without departing from the scope of the invention, can the present invention be changed or be revised.
Claims (10)
1. a wind turbine blade, its length is greater than 49.9 meters and be less than 50.9 meters, for example 50.5 meters, the relative length of described blade is 1, described wind turbine blade further comprises blade root end and point, described wind turbine blade comprises overall aerodynamic shape, and this aerodynamic shape comprises the section (cross section) of several aerodynamic shape, and these sections are by least sectional thickness, wing chord and torsion are determined; It is characterized in that: described blade has:
-be 0.06 place from described blade root end relative distance, torsion is 27.93 degree ± 10%;
-be 0.20 place from described blade root end relative distance, torsion is 15.04 degree ± 10%;
-be 0.41 place from described blade root end relative distance, torsion is 4.02 degree ± 10%.
2. wind turbine blade according to claim 1, is characterized in that, described torsion has ± and 7.5% tolerance.
3. wind turbine blade according to claim 1, is characterized in that, described torsion has ± and 5% tolerance.
4. wind turbine blade according to claim 1, is characterized in that, described torsion has ± and 2.5% tolerance.
5. wind turbine blade according to claim 1, is characterized in that, described torsion has ± and 0% tolerance.
6. according to the wind turbine blade described in claim 1 to 5 any one, it is characterized in that, the bolt circle diameter of described wind turbine blade is 1800 millimeters.
7. according to the wind turbine blade described in claim 1 to 6 any one, it is characterized in that, described wind turbine blade comprises and is positioned at blade root end, for the hole of 64 groups of securing meanss.
8. according to the wind turbine blade described in claim 1 to 7 any one, it is characterized in that, described wind turbine blade is mainly prepared from by the glass fibre of embedded rings epoxy resins.
9. a wind turbine, it comprises at least two, is preferably wind turbine blade described in three claim 1-7 any one.
10. wind turbine according to claim 9, is characterized in that, the rated output power of described wind turbine is 1.6 megawatt ± 15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310022301.XA CN103939276A (en) | 2013-01-21 | 2013-01-21 | Wind turbine vane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310022301.XA CN103939276A (en) | 2013-01-21 | 2013-01-21 | Wind turbine vane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939276A true CN103939276A (en) | 2014-07-23 |
Family
ID=51187109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310022301.XA Pending CN103939276A (en) | 2013-01-21 | 2013-01-21 | Wind turbine vane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103939276A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593761A (en) * | 2016-12-19 | 2017-04-26 | 北京金风科创风电设备有限公司 | Blade, wind power generator comprising blade, male die and method for manufacturing male die |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2265672A (en) * | 1992-03-18 | 1993-10-06 | Advanced Wind Turbines Inc | Wind turbine blade |
| CN201133325Y (en) * | 2007-12-29 | 2008-10-15 | 段小平 | A windwheel vane |
| CN101956649A (en) * | 2009-07-15 | 2011-01-26 | 沈阳风电设备发展有限责任公司 | High-efficiency 1.5MW wind-electricity blade aerodynamic shape |
-
2013
- 2013-01-21 CN CN201310022301.XA patent/CN103939276A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2265672A (en) * | 1992-03-18 | 1993-10-06 | Advanced Wind Turbines Inc | Wind turbine blade |
| CN201133325Y (en) * | 2007-12-29 | 2008-10-15 | 段小平 | A windwheel vane |
| CN101956649A (en) * | 2009-07-15 | 2011-01-26 | 沈阳风电设备发展有限责任公司 | High-efficiency 1.5MW wind-electricity blade aerodynamic shape |
Non-Patent Citations (1)
| Title |
|---|
| 沈坤荣: "大型水平轴风力发电机组叶片空气动力学设计", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593761A (en) * | 2016-12-19 | 2017-04-26 | 北京金风科创风电设备有限公司 | Blade, wind power generator comprising blade, male die and method for manufacturing male die |
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Application publication date: 20140723 |