WO2023012385A1 - Transicion de laminados de material compuesto para pala modular - Google Patents
Transicion de laminados de material compuesto para pala modular Download PDFInfo
- Publication number
- WO2023012385A1 WO2023012385A1 PCT/ES2021/070600 ES2021070600W WO2023012385A1 WO 2023012385 A1 WO2023012385 A1 WO 2023012385A1 ES 2021070600 W ES2021070600 W ES 2021070600W WO 2023012385 A1 WO2023012385 A1 WO 2023012385A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transition
- width
- laminate
- cap
- joint
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/721—Fibre-reinforced materials
- B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
-
- 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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
- F03D1/0677—Longitudinally segmented blades; Connectors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/524—Joining profiled elements
- B29C66/5241—Joining profiled elements for forming coaxial connections, i.e. the profiled elements to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/721—Fibre-reinforced materials
- B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
- B29C66/72141—Fibres of continuous length
-
- 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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
- F03D1/0679—Load carrying structures, e.g. beams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0872—Prepregs
- B29K2105/0881—Prepregs unidirectional
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
- B29K2309/08—Glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0082—Flexural strength; Flexion stiffness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
-
- 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
-
- 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
- F05B2280/00—Materials; Properties thereof
- F05B2280/50—Intrinsic material properties or characteristics
- F05B2280/5001—Elasticity
-
- 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
- F05B2280/00—Materials; Properties thereof
- F05B2280/60—Properties or characteristics given to material by treatment or manufacturing
- F05B2280/6003—Composites; e.g. fibre-reinforced
-
- 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
Definitions
- the invention falls within the field of parts used in a modular blade, and more specifically, the improvement of load transfer between laminates with relevant increases in width and thickness of the beam flange (cap) necessary to accommodate metallic elements. of union that in the original cap do not fit.
- the beam caps are narrow and thin (typically 300-600mm wide and 20-50mm thick). Therefore, to accommodate the metallic elements sufficient to give said structural continuity, it is necessary to thicken said cap in width and thickness.
- Structural fibers mainly FC carbon and FV glass in wind blades
- FC carbon and FV glass in wind blades are materials that can be applied in different orientations and in different combinations depending on the load they need to support.
- Different materials are also mixed or reinforced by adding plastics, metals, etc.
- the patent EP1664528 presents a laminate of fiberglass FV and carbon fiber FC in a ratio of 7 to 1 that, to compensate for the lack of conductivity of the fiberglass, adds a receiver glued to a laminate of steel fibers. This leaves 7 laminates of FV 1 laminate of FC and conductive steel fibers, without modifying the reaction of charges along the width of the joint.
- the patent EP2507508 shows the spar used in a modular racket made of composite material reinforced with carbon fibers that gives it rigidity and resistance while being light.
- a reinforcing block is arranged at the end point of the stringer.
- a laminate with several reinforced layers oriented transversely to the longitudinal direction of the stringer.
- One or more layers of fibers are wound around the stack, gradually increasing to form a transition zone, in any case using a variable stiffness hybrid laminate that modifies the response of the section across the width.
- the patent EP176170 shows the thickened joint of a modular upper where the standard FV is reinforced with FC woven or laid throughout, before applying the resin. They spread continuously. It also shows combinations in continuous strips of FC and strips of wood or FV, joined by resin injection or by vacuum infusion, with definitions of continuous laminates in the width of the joint and therefore without rigidity transitions.
- Hybrid laminates are known and vahados. Each combination responds to specific needs such as the case of the transition of laminates with increased width, object of the invention, which achieves by adjusting the rigidity of the laminate along the width of the joint that the section does not behave as a flat section but the level of load reaction can be adjusted along its width.
- transition laminate must be designed to optimize the transmission of loads and not depending on the loads to be supported, which is usual in the state of the art.
- An object of the invention is the design of the hybrid laminate throughout the length and width of the transition, which allows flattening the load distribution reached by the metallic elements of the blade joint in the preform in the laminates with increased width.
- Another object of the invention is to achieve the most optimized design based on the length of the transition between the widths of the laminate, between the zone of the blade cap and the zone of the joint, and the angle at which this transition defines.
- the ratio of elastic modules E 2int /E 2 ext must be established in the range of 60%-80%.
- Figure 1 a shows a blade in plan with the integration of the joint
- figure 1 b is the section of the joint, showing the comparison of widths between the area of the cap and the area of the joint, and 1c the transition of these panel widths.
- Figures 2a, 2b and 2c show a second embodiment with the joint of the blade in a different place, with a much more relevant panel width transition.
- Figure 3a shows the joint area with its laminates sectioned
- Figure 3b shows the load distribution in the joint elements and the corresponding force reaction curve.
- Figures 4a and 4b show the improved bonding zone, its load distribution and its new load distribution curves.
- FIG. 5 represents another alternative.
- the zone where to establish the joint of a modular blade (1) can be selected closer to the root or closer to the tip.
- Each selected place requires an integration between the cap (2) of the blade, generally with the same width along the entire length of the blade, and the increase in the width of the cap (joining area), necessary to house the metallic elements. of the union, and that can be generated by increasing its lamination, or by using a preform (3).
- Figure 1 b shows the width of the cap (W cap ) with little difference compared to the width of the joint (Wj Oint for places close to the tip of the blade and it is the joint called Joint 1 in the previous figure.
- Figure 1 c shows the width transition between the cap (W cap ) and the joint area (Wj 0 ⁇ n t 1) is defined by the angle a, which is defined as the joint design criterion, typically in the range of 5 to 10 e for this type of transitions.
- the cap (2) is made of mainly unidirectional UD composite material.
- the joint area (3) must house the metallic elements necessary to withstand the forces of the joint and therefore has larger dimensions with a transition part (4) and a joint part (5).
- the transition part (4) has a length called ( Ltransition) -
- Figure 2a shows that there are sections in which the difference in width between the cap (2) and the joint area is more pronounced (3), when this is established in intermediate places of the blade (1).
- the widths are detailed in figure 2b.
- the width of the cap (W cap ) remains the same and the joint area (W joint 2 ) is wider, given the greater number of metallic joining elements that it has to accommodate, being in a larger blade area. loads. It is the union named Joint 2 of the previous figure.
- Figure 2c shows the transition of widths from the cap (W cap ) el to the junction area (Wj 0 ⁇ n t 2 ) in this case, keeping the same a by design criteria.
- the transition length ( L transitio n ) is greater than in the previous embodiment, since the increase in width of the junction is significantly greater.
- Wj 0 ⁇ nt is the width of the joints (W joint 1 , W joint 2 ), is the width of the cap, and is the width reduction angle that the laminate has in the transition.
- transition length is equal to one-half the junction width minus the cap width, divided by the tangent to a.
- Figure 3a shows a plan view with the cap (2) sectioned according to AA and the area of the joint (3) sectioned according to BB.
- the cap has a material with an elastic modulus Et and the lamination of the joining zone (3) is made with a material with an elastic modulus E 2 .
- Figure 3b shows how the width of the joint (W joint ) (5) makes the load (Ft) received from the cap laminate tend to go predominantly through the central elements that are aligned with it (2), instead of from the side elements.
- the load is transferred by shear from the center of the laminate to the end elements, so that if there is not enough transition length, it reaches the corners in a lesser way than through the center (F 2 ).
- Figure 4a shows the behavior of the sectioned cap AA and of the union zone when it is laminated with a lamination sequence with inhomogeneity along its width, providing it with variable rigidity along the width, adding in the center a material with a lower modulus than on the sides so that the load transfer is more uniform.
- a laminate with a higher modulus of elasticity E 2ext typically unidirectional carbon or glass fiber
- E 2ext typically unidirectional carbon or glass fiber
- Figure 4b shows the new load distribution according to the hybrid laminate where its rigidity in width has been adjusted.
- the stiffness of the laminate By adjusting the stiffness of the laminate, the theoretical load curve (6) of F 2theor and the real curve (7) of F 2 ' overlap, improving the joint capacity. This is achieved with a ratio of elastic modules E 2int /E 2 ext in the range of 40%-60%.
- the total flattening of the curve (8) would be achieved, called F 2
- the joint section would no longer deform with a flat section (Navier's law), no longer due to an unintended three-dimensional effect caused by the width transition, but rather due to the design effect of the stiffness of the target laminate. from the spade designer.
- Figure 5 shows a natural alternative to achieve a correct load transfer from the cap to the joint area, making a very long transition.
- the angle of the joint, a' In order to ensure that the load is correctly transferred by shear to the laminated side elements of uniform rigidity, the angle of the joint, a', must be greatly reduced (in the order of 2- to 3 e ), and therefore lengthen the length of the joint. the transition.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES21952669T ES3055327T3 (en) | 2021-08-06 | 2021-08-06 | Transition for composite laminates for a modular blade |
| CN202180102060.2A CN117940663A (zh) | 2021-08-06 | 2021-08-06 | 用于模块化叶片的复合层压材料的过渡部分 |
| US18/681,677 US20240336017A1 (en) | 2021-08-06 | 2021-08-06 | Transition for composite laminates for a modular blade |
| EP21952669.6A EP4382742B1 (en) | 2021-08-06 | 2021-08-06 | Transition for composite laminates for a modular blade |
| AU2021458847A AU2021458847A1 (en) | 2021-08-06 | 2021-08-06 | Transition for composite laminates for a modular blade |
| PCT/ES2021/070600 WO2023012385A1 (es) | 2021-08-06 | 2021-08-06 | Transicion de laminados de material compuesto para pala modular |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ES2021/070600 WO2023012385A1 (es) | 2021-08-06 | 2021-08-06 | Transicion de laminados de material compuesto para pala modular |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023012385A1 true WO2023012385A1 (es) | 2023-02-09 |
Family
ID=85154305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ES2021/070600 Ceased WO2023012385A1 (es) | 2021-08-06 | 2021-08-06 | Transicion de laminados de material compuesto para pala modular |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240336017A1 (es) |
| EP (1) | EP4382742B1 (es) |
| CN (1) | CN117940663A (es) |
| AU (1) | AU2021458847A1 (es) |
| ES (1) | ES3055327T3 (es) |
| WO (1) | WO2023012385A1 (es) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115977866B (zh) * | 2023-03-20 | 2023-05-23 | 新创碳谷集团有限公司 | 一种模块化风电叶片及其连接结构 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0176170A1 (en) | 1984-06-04 | 1986-04-02 | Pasteur Merieux Serums Et Vaccins | Herpes simplex virus as a vector |
| EP1664528A1 (en) | 2003-09-15 | 2006-06-07 | Lm Glasfiber A/S | A method of lightning-proofing a blade for a wind-energy plant |
| US20110142662A1 (en) * | 2010-10-28 | 2011-06-16 | General Electric Company | Spar Cap Assembly for a Wind Turbine Rotor Blade |
| EP2507508A2 (en) | 2009-12-02 | 2012-10-10 | Vestas Wind Systems A/S | Sectional wind turbine blade |
| WO2013010979A2 (en) * | 2011-07-20 | 2013-01-24 | Lm Wind Power A/S | Wind turbine blade with transition region |
| US20140271198A1 (en) * | 2013-03-13 | 2014-09-18 | Vestas Wind Systems A/S | Wind turbine blades with layered, multi-component spars, and associated systems and methods |
| EP3093485A1 (en) * | 2015-05-11 | 2016-11-16 | Blade Dynamics Limited | A wind turbine blade |
| US20180245566A1 (en) * | 2015-08-24 | 2018-08-30 | Hitachi, Ltd. | Wind Power Generation Device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180051672A1 (en) * | 2016-08-19 | 2018-02-22 | General Electric Company | Jointed rotor blade for wind turbine |
| EP3653872A1 (de) * | 2018-11-19 | 2020-05-20 | Nordex Energy GmbH | Verfahren zum herstellen zweier rotorblattsegmente, rotorblattsegment sowie geteiltes rotorblatt |
| WO2020119874A1 (en) * | 2018-12-14 | 2020-06-18 | Vestas Wind Systems A/S | Wind turbine blade |
| DK3712424T3 (da) * | 2019-03-21 | 2023-10-09 | Siemens Gamesa Renewable Energy As | Vindmøllevinge og vindmølle |
| EP3808972B1 (de) * | 2019-10-18 | 2026-04-29 | VENSYS Energy AG | Verbindung zwischen längssegmenten eines rotorblattes des rotors einer windenergieanlage |
| GB202016561D0 (en) * | 2020-10-19 | 2020-12-02 | Blade Dynamics Ltd | Wind turbine blade with reinforcing structure |
-
2021
- 2021-08-06 CN CN202180102060.2A patent/CN117940663A/zh active Pending
- 2021-08-06 AU AU2021458847A patent/AU2021458847A1/en active Pending
- 2021-08-06 EP EP21952669.6A patent/EP4382742B1/en active Active
- 2021-08-06 ES ES21952669T patent/ES3055327T3/es active Active
- 2021-08-06 WO PCT/ES2021/070600 patent/WO2023012385A1/es not_active Ceased
- 2021-08-06 US US18/681,677 patent/US20240336017A1/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0176170A1 (en) | 1984-06-04 | 1986-04-02 | Pasteur Merieux Serums Et Vaccins | Herpes simplex virus as a vector |
| EP1664528A1 (en) | 2003-09-15 | 2006-06-07 | Lm Glasfiber A/S | A method of lightning-proofing a blade for a wind-energy plant |
| EP2507508A2 (en) | 2009-12-02 | 2012-10-10 | Vestas Wind Systems A/S | Sectional wind turbine blade |
| US20110142662A1 (en) * | 2010-10-28 | 2011-06-16 | General Electric Company | Spar Cap Assembly for a Wind Turbine Rotor Blade |
| WO2013010979A2 (en) * | 2011-07-20 | 2013-01-24 | Lm Wind Power A/S | Wind turbine blade with transition region |
| US20140271198A1 (en) * | 2013-03-13 | 2014-09-18 | Vestas Wind Systems A/S | Wind turbine blades with layered, multi-component spars, and associated systems and methods |
| EP3093485A1 (en) * | 2015-05-11 | 2016-11-16 | Blade Dynamics Limited | A wind turbine blade |
| US20180245566A1 (en) * | 2015-08-24 | 2018-08-30 | Hitachi, Ltd. | Wind Power Generation Device |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4382742A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2021458847A1 (en) | 2024-02-22 |
| EP4382742C0 (en) | 2025-11-26 |
| EP4382742B1 (en) | 2025-11-26 |
| EP4382742A1 (en) | 2024-06-12 |
| ES3055327T3 (en) | 2026-02-11 |
| US20240336017A1 (en) | 2024-10-10 |
| CN117940663A (zh) | 2024-04-26 |
| EP4382742A4 (en) | 2024-11-27 |
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