CN107676232B - Modularized wind turbine blade structure and assembly method thereof - Google Patents
Modularized wind turbine blade structure and assembly method thereof Download PDFInfo
- Publication number
- CN107676232B CN107676232B CN201710951822.1A CN201710951822A CN107676232B CN 107676232 B CN107676232 B CN 107676232B CN 201710951822 A CN201710951822 A CN 201710951822A CN 107676232 B CN107676232 B CN 107676232B
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- blade
- pneumatic
- aerodynamic profile
- section
- wind turbine
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- 238000000034 method Methods 0.000 title claims description 12
- 239000002131 composite material Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 230000011218 segmentation Effects 0.000 abstract 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/302—Segmented or sectional blades
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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
A modular wind turbine blade structure and method of making the same is disclosed, the blade comprising at least a blade tip section and a She Genduan, the optimal segmented position of which is located near the maximum chord of the blade near the blade tip side. She Genduan the hollow columnar load-carrying structure and a plurality of aerodynamic profile plates are formed, and hollow columnar load-carrying structure and profile plates are independently manufactured, have middle hollow and bearing structure, be convenient for bond with the cylinder and lighten blade weight, and the apex section exists the cylinder structure of being connected with the blade root section, and apex section adopts bolted connection with the blade root section, and the bolt distributes at the segmentation face and constitutes complete circular. After the bolt connection of the blade tip and the blade root section is completed, the pneumatic outline plate is glued according to the sectional position. The modularized wind wheel blade can realize sectional design, manufacture and transportation of long blades and has the characteristics of small manufacturing difficulty and high structural strength.
Description
Technical Field
The invention relates to a wind driven generator blade, in particular to a modularized wind turbine blade structure and an assembly method thereof, and belongs to the field of wind power blade manufacturing.
Background
The utilization of a large amount of fossil energy increases the burden of the global ecological environment while promoting the technical development, the atmospheric pollution threatens the life and health of human beings, renewable energy gradually becomes the energy resource of preferential selection, more important place will be occupied in the energy structure of each country, and wind energy is taken as a renewable energy form, and has the advantages of lower development cost, mature technology, wide distribution and the like, and becomes the key direction of the development of renewable energy in recent years. In order to fully utilize wind energy resources, the wind turbine is gradually enlarged, the length of the blades is also continuously increased, regions rich in wind resources are often remote mountain areas, desert areas rarely reached by people are poor in traffic conditions, long blades are difficult to transport, and the transportation is forbidden after the blades reach a certain length. As can be seen, the size of the wind turbine is limited by transportation conditions.
At present, the wind power blade is generally manufactured by adopting a fiber reinforced polymer-based composite material, and the production process of the composite material blade has severe requirements on environment and process, and many wind power sites have severe wind sand or high humidity and salinity. Under the environment, the production quality of the wind power blade is difficult to effectively guarantee, and the carbon fiber used in the ultra-long blade is more difficult to control because the carbon fiber is more sensitive to the production condition. The construction of a blade production base near a wind farm also has regional limitations, has a limited radiation range, and can greatly increase the comprehensive cost of the blade. Therefore, when the length of the blade reaches a certain limit, a plurality of limiting factors which are difficult to overcome exist in the production, transportation and installation processes of the traditional integral blade, and the sectional type blade is adopted for production in the existing factory, and the sectional transportation and field assembly are effective methods for solving the problem of large-scale wind turbine generators.
Before hoisting, the sectional blade needs to assemble all the parts to form a whole with continuous pneumatic appearance, complete structure and complete functions. Most of the existing segmented blades are designed in a remodelling mode on the basis of the existing non-segmented blades, the bolts are distributed on the contour line of the blade skin, particularly the vicinity of the maximum thickness of the wing profile, the blade root section still adopts the conventional design of the non-segmented blades, the structure has the defect of the fatigue strength of the bolts, and the structure and the pneumatic designability of the blade root section are poor. Accordingly, there is a need for improvements in the construction of existing segmented blades for wind turbines and methods of assembling the same.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks and disadvantages of the prior art, the present invention provides a modular wind turbine blade structure with stable connection, small aerodynamic loss and simple assembly connection operation, and an assembly connection method thereof.
According to one aspect of the invention, the technical scheme adopted by the invention for solving the technical problems is as follows:
a modularized wind turbine blade structure comprises at least one blade tip section and at least one blade root section distributed along a spanwise direction, wherein a plurality of bolt groups are sequentially connected between the blade tip section and the blade root section to form a whole blade, and the modularized wind turbine blade structure is characterized in that,
the blade root section comprises a hollow columnar load-carrying structure which is independently manufactured and extends along the expanding direction, and a plurality of pneumatic contour plates which are attached and fixed on the periphery of the hollow columnar load-carrying structure, wherein a plurality of supporting structures are arranged in the cavities of the pneumatic contour plates,
the blade tip section comprises a blade tip portion at its main body portion and a connection portion at its root portion, said connection portion having a spanwise width and being located substantially at the maximum chord of the blade, comprising a bolted cylindrical attachment for load bearing and an aerodynamic profile skin,
the end part of the hollow columnar force-bearing structure is connected to the bolt-connecting cylindrical accessory for bearing through a bolt, and the aerodynamic profile skin is fixed to the end part of the hollow columnar force-bearing structure, so that the aerodynamic profile plate of She Genduan, the aerodynamic profile skin of the connecting part and the aerodynamic profile skin of the blade tip part form a complete and continuous aerodynamic profile of the wind turbine blade, and the wind turbine blade has good aerodynamic characteristics after the blade sections are connected.
Preferably, the blade tip portion is fabricated from a composite material including an aerodynamic profile skin, a load bearing spar cap, and a shear web.
Preferably, the hollow cylindrical load-carrying structure is made of a composite material, preferably by a winding forming process.
Preferably, the aerodynamic profile plate of the blade root section is composed of multiple sections along the spanwise direction, and a leading edge and a trailing edge supporting structure are arranged on the inner side of the aerodynamic profile plate.
Preferably, the aerodynamic profile plates of each blade root section are respectively connected to the outer side of the hollow columnar force bearing structure in an adhering manner to form an integral aerodynamic profile and force bearing structure.
Preferably, the leading edge and the trailing edge between the pressure surface and the suction surface of the pneumatic appearance skin of the connecting part are mechanically connected, so that the pneumatic appearance skin is convenient to detach and maintain.
Preferably, each bolt centerline coincides with the nearby layering neutral layer, preferably the bolt upper and lower surfaces are symmetrically layered.
According to another aspect of the present invention, the present invention provides a method for manufacturing a modular wind turbine blade, for solving the technical problems thereof, comprising the steps of:
(1) Separately manufacturing each columnar bearing structure and aerodynamic profile plate of the blade tip section and the blade root section;
(2) Sleeving the profile plates of each blade root section into a columnar bearing structure in an adhesive manner;
(3) Adopting bolts to connect the columnar bearing structure of the blade root section and the bolt connecting accessory of the blade tip section;
(4) The pressure surface and suction surface airfoil profile plates at the sections are connected together in a mechanical connection mode, so that the airfoil profile plates are fixed on the columnar load-carrying structure.
Compared with the prior art, the modularized wind turbine blade structure and the preparation method thereof have the following remarkable technical effects:
1. the modularized wind turbine blade can realize sectional manufacturing, sectional transportation and on-site assembly of the wind turbine blade, and greatly reduces transportation and manufacturing cost.
2. The blade root section of the wind turbine blade is formed by combining a hollow columnar load-carrying structure and a pneumatic profile plate which are sealed in the circumferential direction, and the outer surface of the blade root section has a consistent aerodynamic profile, so that the whole wind turbine blade has good aerodynamic characteristics after the blade sections are connected.
3. The wind turbine blade connecting section adopts the bolt connection bearing columnar structure, so that the fatigue strength of the bolt connection is effectively improved.
Drawings
FIG. 1 is a schematic view of a modular wind turbine blade connection overall of the present invention;
FIG. 2 is a cross-sectional view of a blade root segment (A-A);
FIG. 3 is a cross-sectional view of a blade attachment section (B-B);
FIG. 4 shows a spanwise cross-section of the blade attachment section (C-C).
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
As shown in FIG. 1, the modularized wind turbine blade comprises at least one blade tip section ii and at least one blade root section i which are distributed along the spanwise direction, wherein the connecting parts of the blade sections are positioned at the positions (B-B sections) of the maximum chord length of the blade and close to the blade tip direction, and the blade sections are sequentially connected into a whole through connecting bolts on a hollow columnar load-bearing structure. The tip section ii comprises a tip portion at its main body portion, which is made of a composite material comprising a aerodynamic profile skin, a load-bearing spar cap and a shear web, and a connecting portion at its root portion, which has a spanwise width and is located substantially at the maximum chord of the blade, comprising a bolted attachment for load bearing and the aerodynamic profile skin.
As shown in fig. 2, the blade root section i is composed of blade root contour plates 1, 2, support ribs 3, hollow cylindrical connecting structures 4 extending in the spanwise direction. Wherein each blade root aerodynamic profile board 1, 2 adopts the bonding mode to connect to the outside of column load-carrying structure 4 in proper order respectively, and the blade root profile board 1, 2 inboard sets up preceding, trailing edge supporting rib 3 to form good aerodynamic profile and whole load-carrying structure. The hollow cylindrical load-carrying structure 4 is manufactured from a composite material, preferably by a winding forming process.
As shown in fig. 3, the bolting attachment of the blade tip section for bearing force forms a closed curve, the end of the hollow bearing force columnar structure 4 is connected to the bolting attachment for bearing force by bolts 6, the aerodynamic profile skin is fixed on the end of the hollow columnar bearing force structure, and mechanical connection 8 and 9 are adopted between the pressure surface of the aerodynamic profile skin and the leading edge and the trailing edge of the suction surface, so that the aerodynamic profile board of She Genduan, the aerodynamic profile skin of the connecting part and the aerodynamic profile skin of the blade tip part form a complete and continuous aerodynamic profile of the wind turbine blade after connection is completed, thereby ensuring that the whole wind turbine blade has good aerodynamic characteristics.
As shown in FIG. 4, the spanwise connecting bolts 10 of each blade segment of the wind turbine blade form a convex aerodynamic profile 11 with the bolt centerline coincident with the nearby layup neutral. Preferably, the upper and lower surfaces of the bolts are symmetrically layered.
When the multi-section blade is assembled on site, the method comprises the following steps:
(1) Separately manufacturing each columnar bearing structure and aerodynamic profile plate of the blade tip section and the blade root section;
(2) Sleeving the profile plates of each blade root section into a columnar bearing structure in an adhesive manner;
(3) Adopting bolts to connect the columnar bearing structure of the blade root section and the bolt connecting accessory of the blade tip section;
(4) The pressure surface and suction surface airfoil profile plates at the sections are connected together in a mechanical connection mode, so that the airfoil profile plates are fixed on the columnar load-carrying structure.
The above specific embodiments are used for further detailed description of the objects, technical solutions and advantageous effects of the present invention. It should be understood that the foregoing description is only of specific embodiments of the present invention and is not intended to limit the invention, but rather should be construed to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention.
Claims (2)
1. A modularized wind turbine blade structure comprises at least one blade tip section and at least one blade root section distributed along a spanwise direction, wherein a plurality of bolt groups are sequentially connected between the blade tip section and the blade root section to form a whole blade, and the modularized wind turbine blade structure is characterized in that,
the blade root section comprises a hollow columnar load-carrying structure which is independently manufactured and extends along a spanwise direction and a plurality of pneumatic outline plates which are attached and fixed on the periphery of the hollow columnar load-carrying structure, a plurality of supporting structures are arranged in a cavity of each pneumatic outline plate, each pneumatic outline plate consists of a plurality of sections along the spanwise direction, each section of pneumatic outline plate is connected to the outer side of the hollow columnar load-carrying structure in an adhesive manner to form an integral pneumatic outline and load-carrying structure, and a front edge supporting structure and a tail edge supporting structure are arranged on the inner side of each pneumatic outline plate;
the blade tip section comprises a blade tip portion at a main body portion thereof and a connecting portion at a root portion thereof, the blade tip portion being made of a composite material and comprising a aerodynamic profile skin, a load-bearing spar cap, and a shear web, the connecting portion having a spanwise width and being located substantially at a maximum chord of the blade, and the connecting portion comprising a bolted cylindrical attachment for load bearing and an aerodynamic profile skin, wherein,
the end part of the hollow columnar force bearing structure of She Genduan is connected with the force bearing cylindrical accessory through bolts,
the aerodynamic profile skin of the connection portion is secured to the end of the hollow columnar load bearing structure of She Genduan such that the aerodynamic profile plate of the blade root section, the aerodynamic profile skin of the connection portion, and the aerodynamic profile skin of the blade tip portion form a complete and continuous aerodynamic profile of the wind turbine blade,
and the leading edge and the trailing edge between the pressure surface and the suction surface of the pneumatic appearance skin of the connecting part are mechanically connected, so that the pneumatic appearance skin is convenient to detach and maintain.
2. The modular wind turbine blade structure of claim 1, wherein the hollow cylindrical force bearing structure is fabricated from a composite material and is formed using a winding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710951822.1A CN107676232B (en) | 2017-10-13 | 2017-10-13 | Modularized wind turbine blade structure and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710951822.1A CN107676232B (en) | 2017-10-13 | 2017-10-13 | Modularized wind turbine blade structure and assembly method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107676232A CN107676232A (en) | 2018-02-09 |
| CN107676232B true CN107676232B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710951822.1A Active CN107676232B (en) | 2017-10-13 | 2017-10-13 | Modularized wind turbine blade structure and assembly method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139549B (en) * | 2018-08-08 | 2021-05-25 | 合肥通用机械研究院有限公司 | Wear-resistant and corrosion-resistant carbon fiber axial flow fan blade device |
| CN110374796A (en) * | 2019-07-29 | 2019-10-25 | 明阳智慧能源集团股份公司 | A kind of wind-driven generator inflatable blade construction |
| CN110439743B (en) * | 2019-09-10 | 2021-01-19 | 上海电气风电集团股份有限公司 | Sectional blade of wind turbine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734084A (en) * | 2012-06-26 | 2012-10-17 | 昆明理工峰潮科技有限公司 | Sectional blade of wind driven generator |
| 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 |
| CN104653411A (en) * | 2014-12-24 | 2015-05-27 | 中国科学院工程热物理研究所 | Wind turbine blade with tail edge reinforced prefabricated member |
| CN207393392U (en) * | 2017-10-13 | 2018-05-22 | 中国科学院工程热物理研究所 | A kind of modularization wind turbine blade structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011088025A1 (en) * | 2011-12-08 | 2013-06-13 | Wobben Properties Gmbh | Rotor blade for horizontal axle wind turbine, has anchoring element anchored in blade outer part, counter element anchored in blade inner part, and connecting bolts reaching through counter element and fastened in anchoring element |
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- 2017-10-13 CN CN201710951822.1A patent/CN107676232B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734084A (en) * | 2012-06-26 | 2012-10-17 | 昆明理工峰潮科技有限公司 | Sectional blade of wind driven generator |
| 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 |
| CN104653411A (en) * | 2014-12-24 | 2015-05-27 | 中国科学院工程热物理研究所 | Wind turbine blade with tail edge reinforced prefabricated member |
| CN207393392U (en) * | 2017-10-13 | 2018-05-22 | 中国科学院工程热物理研究所 | A kind of modularization wind turbine blade structure |
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