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
Links
- 230000007704 transition Effects 0.000 title claims abstract description 41
- 239000002131 composite material Substances 0.000 title claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000003365 glass fiber Substances 0.000 claims description 8
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 238000005304 joining Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009755 vacuum infusion Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
-
- 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.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 WO2023012385A1 (es) | 2021-08-06 | 2021-08-06 | Transicion de laminados de material compuesto para pala modular |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2021458847A1 (es) |
WO (1) | WO2023012385A1 (es) |
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 |
-
2021
- 2021-08-06 WO PCT/ES2021/070600 patent/WO2023012385A1/es active Application Filing
- 2021-08-06 AU AU2021458847A patent/AU2021458847A1/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 |
Also Published As
Publication number | Publication date |
---|---|
AU2021458847A1 (en) | 2024-02-22 |
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