CN101813057A - Megawatt wind turbine blade with rib - Google Patents
Megawatt wind turbine blade with rib Download PDFInfo
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- CN101813057A CN101813057A CN201010148365A CN201010148365A CN101813057A CN 101813057 A CN101813057 A CN 101813057A CN 201010148365 A CN201010148365 A CN 201010148365A CN 201010148365 A CN201010148365 A CN 201010148365A CN 101813057 A CN101813057 A CN 101813057A
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- cabin rib
- web
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- 239000000463 material Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 229920006351 engineering plastic Polymers 0.000 claims description 3
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- 238000012546 transfer Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 14
- 230000005611 electricity Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UJCHIZDEQZMODR-BYPYZUCNSA-N (2r)-2-acetamido-3-sulfanylpropanamide Chemical class CC(=O)N[C@@H](CS)C(N)=O UJCHIZDEQZMODR-BYPYZUCNSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
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- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000012141 concentrate Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000010008 shearing 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
Abstract
The invention discloses a megawatt wind turbine blade with ribs. The blade consists of a front edge, a rear edge, a main beam, a web plate and ribs, wherein the front edge and the rear edge form a shell of the blade mainly meeting the requirements of aerodynamic performance of the wind turbine blade, and the main beam, the web plate and the ribs form the internal frame of the blade mainly meeting the requirements of structural performance of the wind turbine blade. On the basis of guaranteeing the maximum output power, the megawatt wind turbine blade in the novel bearing structure with the ribs, the web plate and the main beam is capable of converting the transfer mode of loads inside the internal frame of the blade, optimizing the strained condition of the structure, further adjusting the thickness of laying of the main beam and the web plate, reducing self-weight, and finally realizing high strength and light weight of the blade, which improves the efficiency of a wind-driven generator.
Description
Technical field
The present invention relates to a kind of MW class wind blade new structure, be mainly used in the MW class wind blade, belong to structure and material engineering field with the cabin rib.
Background technique
In recent years, world's wind energy power is on average with the speed increment more than 30%, the fast development of whole world wind-powered electricity generation industry has driven the fast development of wind-powered electricity generation unit, wherein blade is one of critical component of wind-powered electricity generation unit, its performance quality directly influences the Wind Power Utilization efficient and the suffered load of unit of wind-powered electricity generation unit, has determined the overall performance of unit and the Economy of wind-powered electricity generation development and use to a great extent.Simultaneously, blade also is the core component of blower fan, and its cost is about 20% of wind-powered electricity generation unit overall cost.Therefore, each big main blower fan of the world is made the commercial city and is paid much attention to the design and the production of blade, and keeps independent design and throughput as far as possible.Blade Design mainly is divided into pneumatic design and structural design.
Pneumatic design is by optimizing blade profile to satisfy year output power maximization and max power constraint output, at present the designing technique of vane foil is normally used for reference the board a plane design method of air-foil of aviation, before the eighties in 20th century, horizontal axis fan blade aerofoil profile is selected the aviation aerofoil profile of NACA series usually, behind the mid-80, wind-powered electricity generation developed country begins the blade special airfoil is studied, and successfully develop wind electricity blade special airfoil series, such as U.S. Seri and NREL series, Denmark RISO-A series, Sweden FFA-W series and Dutch DU series, these aerofoil profiles respectively have superiority.Though existing fan blade special airfoil has become series, also has the significant improvement space.
Structural design then is that the blade that meets pneumatic requirement is carried out the calculating of intensity, rigidity, stability and tired aspect and checks to satisfy mechanical property requirements.The structure of present large-scale blade all is the form of " covering+girder+web ", and covering is mainly strengthened by the twin shaft composite layer, aerodynamic configuration is provided and bears most of shearing load; Girder is mainly the unidirectional composite material layer to be strengthened, and is the main bearing structure of blade; Web comprises meridosternous and two web, is sandwich structure, mainly girder is played a supporting role.
The MW class wind blade that adopts in the current wind energy turbine set of China generally all adopts the structural type of above-mentioned " covering+girder+web ", some problems can occur behind the use certain hour, through experimental test and analog computation, problem can be summarized as follows:
1, during the blade load, in the environs of blade maximum chord length position stress appears the easiliest, strain is excessive, and causes the cracking and the destruction of this place's blade;
2, cross the holocaust except that near stress blade maximum chord length position, also having a kind of mode of failure is to cause the blade integral structural damage at trailing edge because of cripling;
3, single blade deadweight is excessive, causes the load of whole wind machine group bigger, makes that fan efficiency reduces, cost of production increases, and has finally reduced the cost performance of blower fan.
In sum, under the historical background of the low carbonization of current life, energy greenization, design novel wind blade structural type, improve the aeroperformance and the structural behaviour of wind blade, the cost performance that improves wind energy conversion system seems very urgent, also has huge economic benefit.
Summary of the invention
Goal of the invention:
Problem to be solved by this invention is the deficiency at above-mentioned existing blade structure, and a kind of novel MW class blade structure of band cabin rib of high-strength light is provided.
Technological scheme:
The present invention adopts following technological scheme for achieving the above object:
Plant the MW class wind blade of band cabin rib, comprise leading edge, trailing edge, girder, web up and down, wherein leading edge and trailing edge form blade enclosure, girder, web constitute the blade interior framework up and down, also comprise n cabin rib in blade interior, described n cabin rib is transverse to web, is connected with the inboard of blade enclosure, n is a natural number, and n 〉=6.
Further, the MW class wind blade of band of the present invention cabin rib, the cabin rib gathers near blade maximum chord length cross section, be respectively blade maximum chord length section in blade root direction 0.1L scope and blade maximum chord length section in blade tip direction 0.2L scope, the arrangement pitch of cabin rib is between the 1.0-2.0m, and L is the blade total length; The cabin rib of all the other sections of blade is dredged cloth, and arrangement pitch is between the 3.0-5.0m.
Further, the MW class wind blade of band of the present invention cabin rib, the material that the cabin rib adopts is glass fibre reinforced composion or engineering plastics.
Further, the MW class wind blade of band of the present invention cabin rib, the cross section of cabin rib is asymmetric " worker " font.
The blade structure of the present invention's design comprises leading edge, trailing edge, girder, web and cabin rib five parts, wherein leading edge and trailing edge form blade enclosure, mainly satisfy the aeroperformance requirement of wind blade, girder, web and cabin rib constitute the blade interior framework, mainly satisfy the structural behaviour requirement of wind blade.Blade pass is crossed the novel bearing structure of " cabin rib+web+girder ", change the transfer mode of load in the blade interior framework, the stress of optimizing structure, and then the shop layer thickness of adjusting girder and web, reduce deadweight, finally make blade reach the General of high-strength light.
Concrete structure of the present invention is: the inner frame that is used to carry is made of girder, web and cabin rib, cabin rib wherein can improve the stress (especially the blade oscillating direction is stressed) of blade greatly, and the concrete quantity of cabin rib is comprehensively determined by the length of aforementioned arrangement spacing and blade.
The material of middle deck rib of the present invention can adopt glass fibre reinforced composion, be particularly useful for making high-power MW class blade (more than 1.5MW), but be not limited to glass fibre reinforced composion, can adopt engineering plastics or timber and other materials according to the requirement of strength in the design process.
The cross section of middle deck rib of the present invention is asymmetric " worker " font, because of the cabin rib is parts in the inner frame, must be installed within the blade enclosure, its plane geometric shape depends on vane airfoil profile, therefore the cross section totally presents asymmetric " worker " font, and the upper and lower end in rib cross section, cabin is connected with the above and below of blade enclosure respectively.
Beneficial effect:
The present invention is based on traditional wind blade aerofoil profile, the novel bearing structure of design " cabin rib+web+girder ", it has changed the transfer mode of load, optimized the stress of structure, in view of the above, can adjust girder in the distance blade tip 10.0m scope and web shop layer thickness, reach the purpose that reduces leaf weight.
Compare with existing MW class blade structure, the MW class wind blade new structure of the band cabin rib among the present invention can improve the stress of blade greatly, through experimental test and theoretical calculation being evenly distributed of ess-strain after new structure can make the blade load as can be known, rather than concentrate near the maximum chord length position, and maximum stress value only is about 50% in the traditional blades, especially for the operating mode of swaying direction load, the more remarkable effect that ess-strain reduces; Simultaneously, the new structure of band cabin rib has been avoided the cripling breakoff phenomenon substantially.In addition, by optimizing the shop layer thickness of girder and web, blade can reduce the weight about 2%.
Description of drawings
Fig. 1 is the MW class wind blade schematic representation in known danger cross section.
Fig. 2 is the three-dimensional cross-sectional figure of band of the present invention cabin rib MW class wind blade new structure.
Fig. 3 is the three-dimensional section view of band of the present invention cabin rib MW class wind blade new structure.
Fig. 4 is the geometrical shape schematic representation of cabin of the present invention rib.
Fig. 5 is the two-dimensional section figure of cabin of the present invention rib, i.e. 1-1 cross section among Fig. 4.
Embodiment
Below in conjunction with drawings and Examples the blade new structure among the present invention is described in further detail.
(1) wind blade that satisfies aeroperformance, known aerofoil profile is carried out the primary Calculation of structural design, draw the stress of blade, the dangerous section of clear and definite blade, as shown in Figure 1.But after experimental test and the load of theoretical calculation blade, near internal force the maximum chord length position and distortion are all bigger, are specially the maximum chord length section in blade root direction 3.0m scope, in blade tip direction 6.0m scope, belong to dangerous section.
(2) after the distribution of the stress of the clear and definite blade of primary Calculation and dangerouse cross-section, the blade new structure of the band cabin rib among design the present invention is to satisfy aforementioned intensity, rigidity and stability requirement.The blade structure of the present invention's design comprises leading edge, trailing edge, girder, web and cabin rib five parts, as shown in Figure 2, wherein leading edge and trailing edge form blade enclosure, mainly satisfy the aeroperformance requirement of wind blade, girder, web and cabin rib constitute the blade interior framework, mainly satisfy the structural behaviour requirement of wind blade.
(3) inner frame that is used to carry among the present invention is made of girder, web and cabin rib, cabin rib wherein can improve the stress of blade greatly, the position of its layout and quantity depend on the stress of blade and the position of dangerous section, can be defined as according to experimental test and theoretical calculation: the cabin rib mainly is arranged in the dangerous section of aforementioned vane stress, and the cabin rib must gather in this scope, and arrangement pitch is between the 1.0-2.0m; The cabin rib of all the other sections of blade is dredged cloth, and arrangement pitch is between the 3.0-5.0m; The concrete quantity of cabin rib is comprehensively determined by the length of aforementioned arrangement spacing and blade, generally about 10, as shown in Figure 3.
(4) middle deck rib of the present invention is in installation process, because of the cabin rib is parts in the inner frame, must be installed within the blade enclosure, its plane geometric shape depends on vane airfoil profile, as shown in Figure 4, the upper and lower end in rib cross section, cabin is connected with the above and below of blade enclosure respectively, for avoiding the stress concentration phenomenon occurring at cabin rib and blade enclosure joint, the rib cross section, cabin among the present invention is " worker " font, as shown in Figure 5, according to the geometrical shape of cabin rib, its cross section totally presents asymmetric " worker " font.
(5) blade pass is crossed the novel bearing structure of " cabin rib+web+girder " among the present invention, change the transfer mode of load in the blade interior framework, the stress of optimizing structure, next, can under the prerequisite that satisfies intensity, rigidity and stability requirement, regulate the shop layer thickness of girder and web repeatedly, to reduce the deadweight of blade, through measuring and calculating, the weight of blade can reduce about 2%.
Claims (4)
1. MW class wind blade with the cabin rib, comprise leading edge, trailing edge, girder, web up and down, wherein leading edge and trailing edge form blade enclosure, girder, web constitute the blade interior framework up and down, it is characterized in that: also comprise n cabin rib in blade interior, described n cabin rib is transverse to web, is connected with the inboard of blade enclosure, n is a natural number, and n 〉=6.
2. the MW class wind blade of band according to claim 1 cabin rib, it is characterized in that: the cabin rib gathers near blade maximum chord length cross section, be respectively blade maximum chord length section in blade root direction 0.1L scope and blade maximum chord length section in blade tip direction 0.2L scope, the arrangement pitch of cabin rib is between the 1.0-2.0m, and L is the blade total length; The cabin rib of all the other sections of blade is dredged cloth, and arrangement pitch is between the 3.0-5.0m.
3. the MW class wind blade of band according to claim 1 cabin rib is characterized in that: the material that described cabin rib adopts is glass fibre reinforced composion or engineering plastics.
4. the MW class wind blade of band according to claim 1 cabin rib is characterized in that: the cross section of cabin rib is asymmetric " worker " font.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101483650A CN101813057B (en) | 2010-04-16 | 2010-04-16 | Megawatt wind turbine blade with rib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101483650A CN101813057B (en) | 2010-04-16 | 2010-04-16 | Megawatt wind turbine blade with rib |
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| Publication Number | Publication Date |
|---|---|
| CN101813057A true CN101813057A (en) | 2010-08-25 |
| CN101813057B CN101813057B (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101483650A Expired - Fee Related CN101813057B (en) | 2010-04-16 | 2010-04-16 | Megawatt wind turbine blade with rib |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797645A (en) * | 2012-09-04 | 2012-11-28 | 河海大学常州校区 | Wind-driven generator blade with keel structure |
| CN102797625A (en) * | 2011-05-25 | 2012-11-28 | 通用电气公司 | Rotor blade section and method for assembling a rotor blade for a wind turbine |
| CN103174600A (en) * | 2011-12-22 | 2013-06-26 | 华锐风电科技(集团)股份有限公司 | Fan blade |
| CN105299006A (en) * | 2014-08-01 | 2016-02-03 | 中国科学院宁波材料技术与工程研究所 | MW class wind power generation blade web connecting device and blade assembling method |
| CN106704094A (en) * | 2017-03-15 | 2017-05-24 | 湖南工学院 | Palm plant leaf type wind turbine blade and manufacturing method thereof |
| CN115898754A (en) * | 2023-03-13 | 2023-04-04 | 新创碳谷集团有限公司 | Blade module and forming method thereof |
Citations (4)
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| US20070017918A1 (en) * | 2005-07-20 | 2007-01-25 | Kirk J D | Fuel tank venting arrangement |
| WO2008004174A2 (en) * | 2006-07-06 | 2008-01-10 | Koninklijke Philips Electronics N.V. | Establishing a secure authenticated channel |
| CN201159131Y (en) * | 2008-01-25 | 2008-12-03 | 张延胜 | Wind motor blade |
| CN101611225A (en) * | 2007-01-16 | 2009-12-23 | 丹麦技术大学 | The reinforced blade that is used for wind turbine |
-
2010
- 2010-04-16 CN CN2010101483650A patent/CN101813057B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070017918A1 (en) * | 2005-07-20 | 2007-01-25 | Kirk J D | Fuel tank venting arrangement |
| WO2008004174A2 (en) * | 2006-07-06 | 2008-01-10 | Koninklijke Philips Electronics N.V. | Establishing a secure authenticated channel |
| CN101611225A (en) * | 2007-01-16 | 2009-12-23 | 丹麦技术大学 | The reinforced blade that is used for wind turbine |
| CN201159131Y (en) * | 2008-01-25 | 2008-12-03 | 张延胜 | Wind motor blade |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797625A (en) * | 2011-05-25 | 2012-11-28 | 通用电气公司 | Rotor blade section and method for assembling a rotor blade for a wind turbine |
| CN103174600A (en) * | 2011-12-22 | 2013-06-26 | 华锐风电科技(集团)股份有限公司 | Fan blade |
| CN102797645A (en) * | 2012-09-04 | 2012-11-28 | 河海大学常州校区 | Wind-driven generator blade with keel structure |
| CN102797645B (en) * | 2012-09-04 | 2015-04-01 | 河海大学常州校区 | Wind-driven generator blade with keel structure |
| CN105299006A (en) * | 2014-08-01 | 2016-02-03 | 中国科学院宁波材料技术与工程研究所 | MW class wind power generation blade web connecting device and blade assembling method |
| CN105299006B (en) * | 2014-08-01 | 2018-06-29 | 中国科学院宁波材料技术与工程研究所 | MW grade wind driven generators blade web attachment device and blade assembling method |
| CN106704094A (en) * | 2017-03-15 | 2017-05-24 | 湖南工学院 | Palm plant leaf type wind turbine blade and manufacturing method thereof |
| CN106704094B (en) * | 2017-03-15 | 2023-09-29 | 湖南工学院 | Palmaceae plant blade type wind driven generator blade and manufacturing method thereof |
| CN115898754A (en) * | 2023-03-13 | 2023-04-04 | 新创碳谷集团有限公司 | Blade module and forming method thereof |
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| Publication number | Publication date |
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| CN101813057B (en) | 2013-01-16 |
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Granted publication date: 20130116 Termination date: 20190416 |