CN101555872A - Blade of MW class wind turbine - Google Patents
Blade of MW class wind turbine Download PDFInfo
- Publication number
- CN101555872A CN101555872A CNA2009100245629A CN200910024562A CN101555872A CN 101555872 A CN101555872 A CN 101555872A CN A2009100245629 A CNA2009100245629 A CN A2009100245629A CN 200910024562 A CN200910024562 A CN 200910024562A CN 101555872 A CN101555872 A CN 101555872A
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- blade
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- power generation
- wind power
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses an improvement for a blade of a MW class wind turbine, which is characterized in that the each sectional plane of the opening direction of the blade has the same airfoil shape; the maximal relative thickness of the whole blade airfoil surface is not more than 30%; the relative thickness of the blade and the opening direction are changed according to linearity; and a reinforced crossbeam in the blade is a complex structure of resin matrix fiber at the rear part of the blade and metal, wherein, the resin matrix fiber at the rear part of the blade is transitioned from the resin matrix fiber at the front part and the middle part of the blade. Therefore, the invention can greatly shorten the length of the blade, is convenient for manufacture, transportation and installation, simplifies the other mechanism relative to the blade, substantially conquers the defect of the lack of blade in the prior MW class wind turbine, and is a new idea blade of the MW class wind turbine with.
Description
Technical field
The invention relates to the improvement to blade of MW class wind turbine, relate in particular to a kind of length of blade weak point, overall length is effective aerofoil, the blade of MW class wind turbine that lift coefficient is high.
Background technique
Blade is the most important parts that wind-driven generator is realized power, not only want smooth operation, also should have the maximum power performance, and startup wind-driven generator rotation when hanging down wind speed, and be issued to rotating speed under the rated power and as far as possible little length/power ratio in possible minimum wind force intensity.Existing MW class (for example 1.5 megawatts) blade of wind-driven generator, be weight reduction, substantially all adopt resin-base glass fibre hollow thin-shell construction, its aerofoil profile mostly is aerofoil profiles such as the NACA6 of Dutch DU aerofoil profile, the U.S. and NACA4412, blade structure mostly is the changeover portion two-part composition that has the aerodynamic lift aerofoil and be transited into blade root portion cylinder gradually greatly, and the main bearing member of glass fibre reinforced plastics I-girder as blade arranged in the blade hollow cavity.For making blade root portion can bear the blade moment of flexure and rotating centrifugal force, blade root portion makes LARGE DIAMETER FRP cylinder (the about 1.5-1.8 rice of diameter) mostly, the aerofoil that has good aerodynamic effect by relative thickness (aerofoil section height and its chord length than) less (for example＜40%) like this, carry out the transition to root 1.5-1.8 rice large diameter cylinder and need about 8 meters at least usually, length accounts for about 20% of blade length overall, and power is big more, and this changeover portion accounting example is also big more.The aerodynamically theory, general the aerofoil relative thickness＞38% lift effect is minimum, so the pneumatic effect extreme difference of this section, produces lift hardly, and resistance then increases to the cylinder resistance gradually, we can say the basic invalid length that is.This changeover portion has not only increased length to blade, and for example 1.5 megawatt blade of wind-driven generator length overalls are about 37.5 meters (8 meters long changeover portions that wherein comprise nearly unavailable); And increased invalid weight, the manufacture cost of blade.Secondly, after the lengthened vanes, not only make, transport difficulty, installation difficulty is also big, and the swing diameter change is big, and static balancing and moving flat rare precision are all low, must cause to vibrate and strengthen, and the necessary slurry hub volume that increases, increase slurry hub manufacture cost and weight, also can cause change pulp grinder structure complexity, expand.Besides, big paddle like this, the changeover portion part is owing to be in high-stress state, and material must be selected high strength glass fiber reinforced plastic or carbon fiber composite for use, has not only increased the blade cost; And, can bear the heavily stressed glass fibre reinforced plastics life-span at present mostly to be most about 10 years, and the fan design life-span is 20-25 that the life-span of blade does not far reach fan life like this according to Air Branch research, increased the cost of maintenance, replacing.
In addition, aerofoil profile adopts aerofoil profiles such as the NACA6 of Dutch DU aerofoil profile, the U.S. and NACA4412, and lift coefficient is relatively low, only is about 1.1, and this also is the another reason that causes length of blade bigger.
The disclosed megawatt level wind power generation equipment of Chinese patent CN101059119 wind wheel blade, form by blade root portion part, middle Dutch DU series aerofoil profile and blade tip NACA6 series laminar flow airfoil three parts, leaf root part length is about 36.75%, intermediate portion length is at 36.75%-77.33%, tip segment length 77.33% to the tip of blade tip; Wherein relative thickness 90.6%-44.3% length is 5.33%-16%, length 17.65%-24.88% adopts Dutch DU series aerofoil profile, between the relative thickness 40%-30%, length 36.75%-55.33% adopts Dutch DU series aerofoil profile, relative thickness 25%-21%, tip segment adopts the NACA6 laminar flow airfoil, and relative thickness is 18%.The almost zero-lift effect of this blade, relative thickness at least also are about the 16%-18% of length overall greater than 40% part, and not only above-mentioned defective still exists, and three kinds of aerofoil profile connection part nature transition difficulties, have increased manufacture difficulty.
The objective reality of above-mentioned blade deficiency, still having is worth improved place.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, provides a kind of blade overall length to be the effective aerofoil with lift, and equal-wattage has shortened length of blade greatly, makes and uncomplicated blade of MW class wind turbine.
Another object of the present invention is to provide a kind of lift coefficient higher, can further shorten the blade of MW class wind turbine of length of blade.
The present invention's first purpose realizes, the main improvement: the one, strengthen in the blade crossbeam by leaf before, resin base fiber (for example glass fibre reinforced plastics) transition at middle part is the resin base fiber and the metal composite structure at blade rear portion, last transition is the petiole connector element, bear blade moment of flexure and centrifugal force thus, and reduce the diameter of blade root portion, can omit the changeover portion of zero-lift; The 2nd, the blade exhibition is all adopted with a kind of aerofoil profile to each aerofoil (from first to last), make blade relative thickness and chord length in exhibition to all by linear change, whole blade aerofoil maximum relative thickness is no more than 38%, not only make simple, and the whole blade overall length all is that relative thickness is less, has effective pneumatic shape aerofoil (no changeover portion) than high-lift, both shortened whole blade length, reduced leaf weight, make, transportation, easy for installation, it is moving to have improved blade again, statically balanced precision has reduced the vibration that causes owing to uneven, and can reduce propeller hub and blade pitch device volume, overcome the deficiencies in the prior art, realize the object of the invention.Specifically, blade of MW class wind turbine of the present invention comprises the blade sections with aerodynamic effect, it is characterized in that the blade exhibition is same aerofoil profile to each cross section, whole blade aerofoil maximum relative thickness is no more than 38%, and blade relative thickness and chord length are being opened up to all pressing linear change; Strengthen in the blade crossbeam by blade before, the resin base fiber transition at middle part is the resin base fiber and the metal composite structure at leaf rear portion.
Make for simplifying, the present invention is a kind of be preferably blade from the tip to the aerofoil relative thickness at the 70-80% place of length and chord length by linear change, rear portion 20-30% length for wait relative thickness and etc. chord length, so more help the coordination and the manufacturing of resin base fiber and steel structure composite beam.
Strengthen crossbeam in the blade of the present invention, same as the prior art its sectional shape can have multiple to the blade reinforing function, and wherein a kind of preferentially being chosen as adopts the cross section to be I-shaped or Hexagon or twoport shape, have and make simple, stressed well, and more help cooperating of crossbeam and rib.Blade rear portion crossbeam resin base fiber and metal composite structure, mainly be to play stressed transition, better like this weight and the intensity of having coordinated crossbeam, a kind of being preferably by the outside, cross section is the resin base layer of fibers, the inboard is a metal, more helps the applying of compound crossbeam and resin base fiber blade.This composite structure can be when making resin base fiber crossbeam, and metalwork is compound as plug-in unit.The length of this section composite structure (stretching into length of blade), a kind of be preferably stretch into this section mean chord 2-3 doubly, this considers it is from coordinating the weight and the intensity angle of crossbeam equally.
Render a service and lift coefficient for making blade have higher-wattage, blade airfoil maximum relative thickness of the present invention is for being no more than 35%.
The present invention's second purpose realizes that it is improved to vane airfoil profile and adopts the fx63-137 type, can further improve the lift coefficient of blade, lays the foundation for further shortening length of blade.
In addition, blade of the present invention is identical with the prior art Blade Design, and to the overall length distortion of blade root portion, its distortion mode can be basic identical with the prior art blade, is not particularly limited by blade tip.
Blade of MW class wind turbine of the present invention, because blade rear portion crossbeam adopts resin base fiber and metal composite structure, and bear vane stress (moment of flexure and centrifugal force) with this, thereby can not establish changeover portion, make and all have aerodynamic effect in the blade length range, can reduce the blade total length greatly, also all bring great convenience simultaneously, also can simplify propeller hub and transfer paddle mechanism to blade manufacturing, transportation, installation; Secondly, the blade exhibition is all adopted with a kind of aerofoil profile to each cross section, and each cross section relative thickness of blade and chord length are being opened up to all pressing linear change, not only the blade surface bus almost linearly, it is simple that type is repaiied on the surface, and inner big depth of beam makes crossbeam manufacturing and blade mold manufacturing simple also by linear change, more help the industrial mass manufacturing, can enhance productivity; Besides, the blade airfoil maximum relative thickness is no more than 38%, and particularly relative thickness is no more than 35%, and making the whole blade overall length all is the high effective aerofoil profile of ratio of lift coefficient to drag coefficient, thereby blade has the high power effect; Particularly adopt the big fx63-137 aerofoil profile of lift coefficient, lift coefficient is up to about 1.5, improved the lift coefficient of blade especially, make with generated output or at same wind speed, send out same power electricity prerequisite under further shortening length of blade, for example wing section lift coefficient brings up to 1.5 by 1.1, improve 0.36 times, then the product of chord length and length overall can reduce 36%, make that blade of the present invention is shorter, for example designing and calculating 2 megawatt length of blade only need about 30 meters (1.5 megawatt length only are about 27 meters), have shortened many than the prior art blade.In addition, do not hold the steel structure crossbeam, also make the root of blade size reduce greatly, MW class root of blade diameter only needs 800-1000mm as calculated, and reducing of root diameter (RD) can be dwindled blade pitch device and propeller hub greatly, reduces weight and manufacture difficulty, reduces cost.The particularly shortening greatly of length of blade for the wind-driven generator of aerial setting, can also bring a series of apparent advantages that you easily see.Blade of MW class wind turbine of the present invention has overcome the deficiency that existing blade of MW class wind turbine exists substantially, is a kind of brand new ideas blade of MW class wind turbine.
Optimize the enforcement example below in conjunction with two; the present invention is further understood in exemplary illustration and help; but implementing the example detail only is for the present invention is described; do not represent the present invention to conceive whole technological schemes down; therefore should not be construed as the technological scheme qualification total to the present invention, some do not depart from the unsubstantiality of the present invention's design and change In the view of the technician; for example simple the change or replacement of technical characteristics to have same or similar technique effect all belongs to protection domain of the present invention.
Description of drawings
Fig. 1 is a blade plane schematic representation of the present invention.
Fig. 2 is a blade section schematic representation of the present invention.
Fig. 3 is Fig. 1 blade A-A cross section aerofoil schematic representation.
Fig. 4 is Fig. 1 blade B-B cross section aerofoil schematic representation.
Fig. 5 is Fig. 1 blade C-C cross section aerofoil schematic representation.
Fig. 6 is Fig. 1 blade D-D cross section aerofoil schematic representation.
Fig. 7 is Fig. 1 blade E-E cross section aerofoil schematic representation.
Fig. 8 is Fig. 1 blade F-F cross section aerofoil schematic representation.
Embodiment
Embodiment 1: referring to accompanying drawing, to design 2 megawatt blade of wind-driven generator is example, blade 1 is made the hollow and thin-walled structure by glass fibre reinforced plastics, the blade exhibition is the fx63-137 aerofoil profile to each cross section, 30.15 meters of blade length overalls, blade tip place aerofoil relative thickness 10%, minimum chord length is 1.58 meters, blade tip to the relative thickness of the about 80% place's aerofoil of length of blade is 35%, maximum chord length is 2.6 meters, opening up to all pressing linear change at this each aerofoil relative thickness of section scope blade and chord length, be that the aerofoil relative thickness is reduced into to 10% of blade tip by linear change by 35%, chord length is reduced into to 1.58 meters of blade tip by linear change by 2.6 meters, rear portion 20% length, blade for wait relative thickness and etc. chord length.Preceding in the hollow blade, stage casing has the cross section to be the glass fibre reinforced plastics crossbeam 2 of " worker " word, the rear portion is about 7.8 meters composite structure crossbeam, outside glass fibre reinforced plastics 2, inboard steel profile 3 (web is the outer steel profile of interior glass fibre reinforced plastics), stretching out blade end is that full steel structure petiole 3 (also can still keep skim resin base fiber in the surface, can play antisepsis), diameter is 800-1000mm, and there is the adpting flange of diameter 1000 or 1200mm the exterior edge face.Twist angle of blade is turned round to distortion by existing common blade, by changing to root+26 degree about-2 degree of blade tip.Blade gyration center to adpting flange place is about 1.6 meters.
Embodiment 2: be about 27 meters as embodiment's 1,1.5 megawatt Blade Design length overall.
To those skilled in the art; under this patent design and specific embodiment enlightenment; some distortion that can directly derive or associate from this patent disclosure and general knowledge; or the substituting of known technology commonly used in the prior art; and the mutual various combination between feature; those of ordinary skills recognize also can adopt additive method; for example the basic aerofoil profile of blade also can adopt other aerofoil profiles; RAF6 for example; CLARK Y; NACA-4412; just lift coefficient is less relatively; crossbeam can also adopt other sectional shapes in the blade; Hexagon for example; twoport shape; hollow, rectangular, the resin base fiber can also adopt other high strength fibres, for example carbon fiber; basalt fibre or the like; it can also be other structures that crossbeam petiole outer end connects; for example flange and/or socket cap, or the like unsubstantiality change, can be employed equally; launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Relative percent value be not to be the exact value on the mathematical meaning, but adequate value is relatively optimized in a kind of test among the present invention, suitable a spot of fluctuation, neither, be minimum to effectiveness affects, still belong to the scope of the invention.
Claims (10)
1, blade of MW class wind turbine comprises the blade sections with aerodynamic effect, it is characterized in that the blade exhibition is same aerofoil profile to each cross section, and whole blade aerofoil maximum relative thickness is no more than 38%, and blade relative thickness and chord length are being opened up to all pressing linear change; Strengthen in the blade crossbeam by blade before, the resin base fiber transition at middle part is the resin base fiber and the metal composite structure at leaf rear portion.
2, according to the described megawatt level wind power generation of claim 1 station blade, it is characterized in that blade from the tip to the aerofoil relative thickness at the 70-80% place of length and chord length by linear change, rear portion 20-30% length for wait relative thickness and etc. chord length.
3,, it is characterized in that vane airfoil profile is the fx63-137 aerofoil profile according to the described megawatt level wind power generation of claim 1 station blade.
4, according to claim 1,2 or 3 described megawatt level wind power generation station blades, it is characterized in that the blade airfoil maximum relative thickness is no more than 35%.
5,, it is characterized in that big beam section is I-shaped or Hexagon or twoport shape in the blade according to the described megawatt level wind power generation of claim 4 station blade.
6, according to the described megawatt level wind power generation of claim 5 station blade, it is characterized in that resin base fiber and metal composite crossbeam by the cross section, the outside is the resin base layer of fibers, and the inboard is the composite structure of metal.
7, according to claim 1,2 or 3 described megawatt level wind power generation station blades, it is characterized in that the composite structure crossbeam stretch into length of blade be stretch into this section blade mean chord 2-3 doubly.
8, according to claim 5 or 6 described megawatt level wind power generation station blades, it is characterized in that the composite structure crossbeam stretch into length of blade be stretch into this section blade mean chord 2-3 doubly.
9,, it is characterized in that composite structure crossbeam outer end has flanged and/or socket cap connects shank according to the described megawatt level wind power generation of claim 1 station blade.
10,, it is characterized in that composite structure crossbeam outer end has flanged and/or socket cap connects shank according to the described megawatt level wind power generation of claim 7 station blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100245629A CN101555872A (en) | 2009-02-20 | 2009-02-20 | Blade of MW class wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100245629A CN101555872A (en) | 2009-02-20 | 2009-02-20 | Blade of MW class wind turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101555872A true CN101555872A (en) | 2009-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100245629A Pending CN101555872A (en) | 2009-02-20 | 2009-02-20 | Blade of MW class wind turbine |
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| CN (1) | CN101555872A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103026058A (en) * | 2010-07-08 | 2013-04-03 | Lm玻璃纤维制品有限公司 | Notch-reduced composite joint |
| CN103097722A (en) * | 2010-07-16 | 2013-05-08 | Lm玻璃纤维制品有限公司 | Wind turbine blade with narrow shoulder and relatively thick airfoil profiles |
| CN103629044A (en) * | 2013-12-18 | 2014-03-12 | 中国科学院工程热物理研究所 | Blade root structure of horizontal-axis wind turbine blade |
| CN103982463A (en) * | 2014-05-28 | 2014-08-13 | 航天材料及工艺研究所 | Composite material blade for wind tunnel |
| CN114576087A (en) * | 2022-03-18 | 2022-06-03 | 中国华能集团清洁能源技术研究院有限公司 | Front blade, wind wheel component and double-wind-wheel power generation device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2080994U (en) * | 1990-10-13 | 1991-07-17 | 内蒙古动力机厂 | Blade of 200w wind-driven generator |
| US20070217918A1 (en) * | 2006-03-20 | 2007-09-20 | Baker Myles L | Lightweight composite truss wind turbine blade |
| CN101059119A (en) * | 2007-06-05 | 2007-10-24 | 江苏新誉风力发电设备有限公司 | Wind rotor blade of mw-grade wind driven generator |
| CN201050442Y (en) * | 2007-06-05 | 2008-04-23 | 江苏新誉风力发电设备有限公司 | Megawatt grade wind mill vane |
| CN201351582Y (en) * | 2009-02-20 | 2009-11-25 | 宜兴市华泰国际集团工业有限公司 | Megawatt-stage wind power generator leaf blade |
-
2009
- 2009-02-20 CN CNA2009100245629A patent/CN101555872A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2080994U (en) * | 1990-10-13 | 1991-07-17 | 内蒙古动力机厂 | Blade of 200w wind-driven generator |
| US20070217918A1 (en) * | 2006-03-20 | 2007-09-20 | Baker Myles L | Lightweight composite truss wind turbine blade |
| CN101059119A (en) * | 2007-06-05 | 2007-10-24 | 江苏新誉风力发电设备有限公司 | Wind rotor blade of mw-grade wind driven generator |
| CN201050442Y (en) * | 2007-06-05 | 2008-04-23 | 江苏新誉风力发电设备有限公司 | Megawatt grade wind mill vane |
| CN201351582Y (en) * | 2009-02-20 | 2009-11-25 | 宜兴市华泰国际集团工业有限公司 | Megawatt-stage wind power generator leaf blade |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103026058A (en) * | 2010-07-08 | 2013-04-03 | Lm玻璃纤维制品有限公司 | Notch-reduced composite joint |
| CN103026058B (en) * | 2010-07-08 | 2016-05-04 | Lm玻璃纤维制品有限公司 | The composite junction surface that recess reduces |
| CN103097722A (en) * | 2010-07-16 | 2013-05-08 | Lm玻璃纤维制品有限公司 | Wind turbine blade with narrow shoulder and relatively thick airfoil profiles |
| CN103097722B (en) * | 2010-07-16 | 2016-04-20 | Lm玻璃纤维制品有限公司 | There is the wind turbine blade of narrow shoulder and relative thick aerofoil profile profile |
| CN103629044A (en) * | 2013-12-18 | 2014-03-12 | 中国科学院工程热物理研究所 | Blade root structure of horizontal-axis wind turbine blade |
| CN103629044B (en) * | 2013-12-18 | 2016-08-31 | 中国科学院工程热物理研究所 | A kind of leaf and root structure of Blades For Horizontal Axis Wind |
| CN103982463A (en) * | 2014-05-28 | 2014-08-13 | 航天材料及工艺研究所 | Composite material blade for wind tunnel |
| CN114576087A (en) * | 2022-03-18 | 2022-06-03 | 中国华能集团清洁能源技术研究院有限公司 | Front blade, wind wheel component and double-wind-wheel power generation device |
| CN114576087B (en) * | 2022-03-18 | 2023-05-02 | 中国华能集团清洁能源技术研究院有限公司 | Front blade, wind wheel assembly and double wind wheel power generation device |
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Application publication date: 20091014 |