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WO2012161741A2 - Semelles de longeron pour pale d'éolienne - Google Patents

Semelles de longeron pour pale d'éolienne Download PDF

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Publication number
WO2012161741A2
WO2012161741A2 PCT/US2012/000252 US2012000252W WO2012161741A2 WO 2012161741 A2 WO2012161741 A2 WO 2012161741A2 US 2012000252 W US2012000252 W US 2012000252W WO 2012161741 A2 WO2012161741 A2 WO 2012161741A2
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WO
WIPO (PCT)
Prior art keywords
rods
spar
spar cap
mold
instant invention
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
Application number
PCT/US2012/000252
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English (en)
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WO2012161741A3 (fr
Inventor
Christopher M. Edwards
Robert H. MONROE
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Publication of WO2012161741A2 publication Critical patent/WO2012161741A2/fr
Publication of WO2012161741A3 publication Critical patent/WO2012161741A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • 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

Definitions

  • the instant invention relates to spars or beams and methods for making spars or beams. More specifically, the instant invention relates to spar caps and especially wind blade spar caps comprising pultruded components and methods for making spar caps and especially wind blade spar caps comprising pultruded components.
  • US Patent 5,324,563 is art related to the instant invention.
  • US Patent 5,324,563 discloses a carbon fiber pultruded rod composite structure for reinforcing a substrate wherein the rods are bonded together into a preform for subsequent lay-up on the substrate with cross plied tape or fabric to form a wing or fuselage structure wherein the rods become longerons or stringers carrying axial load while the cross plied skins carry shear.
  • the structure disclosed in US Patent 5,324,563 provided improved compressive strength
  • the structure disclosed in US Patent 5,324,563 is not amenable to forming shapes having compound curvature because the rods are bonded together before lay-up on the substrate.
  • US Patent 5,324,563 did not disclose improved fatigue resistance for its structure.
  • US Patent 7,625, 185 is art related to the instant invention.
  • US Patent 7,625, 185 discloses a composite structure wherein fiber rovings are formed into preformed fiexurally stiff strips which strips are then bonded together to form the final structure.
  • the structure disclosed in US Patent 7,625,185 reduced fiber undulation and reduced problems of heat management during resin curing
  • the structure disclosed in US Patent 7,625,185 uses conventional resin impregnation of the fiber rovings which results in uneven fiber-resin distribution which results in reduced physical properties for the final structure.
  • the imperative for alternative energy is clear throughout the world. Of the many alternative energy options large scale wind turbines are among the most viable both because they are able to produce electricity on a large scale and because they are one of the most cost effective alternatives. However significant further improvement is possible and each improvement in aerodynamic efficiency, structural efficiency and manufacturing cost increases their viability.
  • Wind turbine design requires multiple compromises between aerodynamics, structure, manufacturing cost and operating life. Thin blade sections are more efficient aerodynamically, while thicker blades are more efficient structurally. Thinner blades require more material (or more exotic material) in order to achieve adequate structure.
  • the instant invention is a substantial improvement in the art and specifically upon the art of US Patents 5,324,563 and 7,625,185.
  • the instant invention overcomes many of the most significant structural and manufacturing issues facing large blade producers today namely; near perfect placement, spacing and collimation of fibers, elimination of weal- spots resulting from resin rich or resin poor areas, ability to incorporate tapered sections and reinforcement levels and the ability to produce smooth curves for curved spar caps all while maintaining excellent short term & fatigue properties.
  • the multiple rod technique of the instant invention has been demonstrated to significantly improve compression fatigue of a wind blade spar cap. Additionaly the multiple rod technique of the instant invention has been shown to yield higher modulus and higher strength.
  • the instant invention in one embodiment is a spar cap comprising a plurality of separate composite rods bonded together in a mold to form the spar cap.
  • the instant invention is a process for manufacturing a spar cap by bonding together separate composite rods in a mold, with a bonding agent to form the spar cap.
  • Applications for the spar cap of the instant invention include wind blades, aircraft wings, aircraft rotors, marine spars, marine masts, and civil engineering applications such as bridge beams.
  • the instant invention is a system for generating electricity, the system comprising a wind turbine installation configured to generate electricity, the wind turbine including at least one wind blade, the wind blade comprising a spar comprising spar caps, each spar cap comprising a plurality of plutruded composite rods bonded together in a mold to form each spar cap.
  • Fig. 1 shows data points for a reference material and materials of the instant invention in terms of compressive strength v. fiber volume fraction
  • Fig. 2 shows data points for a reference material and materials of the instant invention in terms of compressive modulus v. fiber volume fraction
  • Fig. 3 shows data points for a reference material and materials of the instant invention in terms of compressive modulus v. compressive strength
  • Fig. 4 shows compression fatigue data curves for a reference material and materials of the instant invention in terms of stress v. cycles
  • Fig. 5 shows a compression fatigue data curve for a material of the instant invention in terms of stress v. cycles
  • Fig. 6a depicts a section of woven fabric composed of strands of fibers
  • Fig. 6b depicts an enlargement of the strands of fibers shown in Fig. 6a as well as a resin surrounding the fibers;
  • Fig. 6c depicts an enlargement of the strands of fibers shown in Fig. 6b as well as a resin surrounding the fibers;
  • Fig. 7 depicts a cross sectional view of a pultruded composite rod showing fibers surrounded by a resin
  • Fig. 8 depicts a number of pultruded rods laid in a curved mold
  • Fig. 9 depicts a wind blade spar cap produced by flowing a bonding agent around the rods shown in Fig. 8 followed by curing the bonding agent to finish the spar cap;
  • Fig. 10 depicts a wind blade spar cap that tapers in both directions from one end to the other end and which is curved in both directions from one end to the other end;
  • Fig. 11 depicts a joint between a stud and a bundle of pultruded rods at one end of a wind blade spar cap of the instant invention
  • Fig. 12 shows a cross sectional view of the stud of Fig. 11;
  • Fig. 13 shows a cross sectional view of the joint of Fig. 11 at a location where the rods surround the stud;
  • Fig. 14 shows a cross sectional view of the joint of Fig. 11 at a location before the rods surround the stud;
  • Fig. 15 is a simplified cross sectional view of a wind blade showing its spar caps, spar web and aerodynamic skin.
  • the advantages of using pre-manufactured pultruded rods, which rods are then bonded together to produce a final spar cap are significant.
  • the pultruded rods are currently readily producible by a multitude of commercial pultruders globally.
  • a particular advantage of pultrusion over resin infusion or pre-pregs is that the fibers have a more even distribution and more complete wet-out and are nearly perfectly straight and aligned.
  • the inherent desire of the rods to remain straight ensures that as multiple rods are placed in a mold the near perfect fiber alignment is continued in the final spar cap.
  • the diameter of the pultruded rods of the instant invention is not critical as long as the final spar cap comprises a plurality of rods. As a starting point, rods having a diameter in the range of from 1.5mm to 12.5mm are suggested.
  • the proposed method is capable of substantially increasing manufacturing throughput due to faster reinforcement placement and increased infusion speed which allows faster curing resins to be utilized.
  • Pre-manufactured pultruded rods can be bonded together to produce a final spar cap with mechanical properties superior to current products.
  • the structure of the instant invention is in effect a composite within a composite.
  • the first composite is the pultruded rod consisting of multiple highly aligned fibers nearly equally spaced within a matrix resin which is cured during the pultrusion process (the above-referenced US Patent 5,324,563 disclosed the benefits of fiber straightness in a pultruded rod structure but does not disclose the benefits of equally spaced fibers in a such a structure).
  • the second composite consists of multiple rods bonded together by an infused resin matrix. This dual scale structure has been named C-Squared (meaning a composite within a composite). We refer to the fibers and resin in the rod as the primary
  • Samples of the instant invention are manufactured using 2 to 6mm diameter pultruded rods.
  • the samples are manufactured by grouping together multiple rods to form a larger hexagonal or rectangular sections. These bundles of pultrusions are held in shape within a vacuum bag and infused with epoxy resin.
  • the rods infuse easily although some voids are observed. The voids are not considered serious enough to prevent testing and their prevention was deferred to later in the project.
  • the rods are cut into short sections and mounted for compression testing. The purpose of the mounting is to mimic as closely as possible the end restraints used in ASTM D6641 and D695 testing to ensure true
  • the short term compressive strength and modulus are measured using this restraint (described as Pultruded Rods 1 or 2) and are shown in Figs 1-3, plotted along with reference data for prior art materials (the NREL/Sandia data from Sandia National Laboratories Report SAND 97-3002). Although the data sampling is relatively small, a number of key points are immediately apparent.
  • the material modulus for the samples of the instant invention and the conventional samples varies linearly and consistently with fiber content. This is to be expected, the data follows a consistent 'rule of mixtures'. However for strength the Sandia data for conventional materials shows a maximum around 50% fiber loading. Above this value, while modulus continues to rise, strength drops off.
  • Short term data is measured on specimens with cross sections between 2.3 and 3.2cm .
  • Long term data is measured on specimens with a maximum cross sectional area of 1. lcm .
  • a total of four sets of fatigue samples were produced (Series 1, 2, 3 and 4). Each set consists of a single infusion of a bundle of rods about 60cm long. Ten samples are cut from each infused specimen and mounted for testing. Initial infusions show the same void problem that appeared in the short term specimens. Significant effort is expended to understand the cause of the voids. Test series 1 through 4 show progressive improvements in void content.
  • the resulting samples are squared off, mounted and end polished for testing.
  • FIG. 6b depicts an enlargement of the fiber strands showing individual fibers 12 surrounded by resin 13.
  • Fig. 6c depicts a further enlargement of the individual fibers 12 surrounded by resin 13.
  • Fig. 7 depicts the arrangement of fibers 14 and resin 15 in a pultruded rod structure, wherein the fiber spacing is much more even and although exaggerated in Fig. 7, there is a thin layer of resin 15 between the fibers 14 even at their closest points.
  • pre-pultruded rods of the instant invention eliminates all of these defects.
  • the rods, once pultruded, are rigid and can be stacked in a mold in perfect (or near perfect) alignment, completely eliminating any marcelling from the weave or stitching.
  • the pultrusion process inherently creates almost perfect fiber alignment and spacing with the rod.
  • the fibers are continuously in tension as the resin is applied and cured which helps to create near perfect axial alignment and unlike resin infusion there is never any sideways force on the fiber to cause bunching. Rather the process by which resin and fibers are pulled into the die in the pultrusion process automatically causes the fibers to space equally through the cross section of the rod. This is especially true for small diameter rods.
  • the combination of these two factors results in reinforcement fibers which are near perfectly axially aligned and near perfectly spaced from each other which are both very desirable attributes in reaching the maximum possible longitudinal properties.
  • the near perfect alignment and near perfect spacing is beneficial in fatigue where failures are almost always the result of a crack propagating from some minor defect.
  • pultrusions of the instant invention are their inherent consistency.
  • the process is highly automated and extremely consistent.
  • the degree of variability in pultrusions is extremely small compared to resin infusion.
  • Inherent variations in the strength of uni-axial pultruded rods are generally accepted to be +/- 3% while vacuum infused structures of the prior art have significantly higher variation.
  • the pultrusions of the instant invention are much easier to test for guaranteed properties, either batch-wise offline or even using online stress rating techniques.
  • a further advantage of the proposed multiple rod composite of the instant invention is that it makes the production of curved and or tapered spar caps less problematic.
  • Curved blades are increasingly considered as a means to increase blade performance while shedding loads from destructively high wind gusts.
  • the 'STAR' (Sweep Twist Adaptive Rotor) proposed by Zuteck et al is one such example.
  • any degree of curvature increases the likelihood of kinks or creases in the reinforcing fabric of prior art structures as the fabric is laid into a mold.
  • the STAR blade partly overcame this difficulty by laying down 'ropes' of wet impregnated fibers, however even those involved with the development suggest that this is a highly impractical (and messy) process that they would not repeat.
  • Fig. 8 depicts pultruded rods 16 laid in a mold to have a curved shape.
  • Fig. 9 depicts a curved spar cap 19 according to the instant invention, wherein a resin 18 has been flowed around the pultruded rods 16, which resin 18 has then been cured to finish the curved spar cap 19.
  • a sample of the instant invention is produced with approximately 12mm of curve over a one meter length.
  • the flexibility of the rods allowed them to easily take the curvature of the mold and be locked into this curvature by the secondary matrix resin. This level of curvature is extreme compared with that required on a full size blade but is not even close to the degree of curvature that is possible using this technique.
  • All large wind blades are tapered both in blade profile for aerodynamic reasons and in construction to reduce outboard weight and match strength and stiffness to applied loads.
  • the creation of this taper is problematic with prior art construction because the relatively thick layers of reinforcement fabric used result in step changes each time a ply is dropped to reduce thickness. This not only causes a stress concentration due to the step change in thickness and reinforcement level but also causes a resin rich area immediately after the ply drop which itself causes structural problems.
  • the use of small discrete rods of the instant invention helps reduce ply drop issues in two ways. First it is possible to spread the drop over a significant length by dropping one rod at a time rather than having to eliminate a complete layer and secondly the end of each rod can easily be tapered to further reduce the stress concentration.
  • Fig. 10 shows a curved and tapered (in both directions at the tip 23) spar cap 20 incorporating the above-mentioned construction wherein some of the rods 22 are shortened or tapered before the resin 21 is flowed around the rods 22 and then cured to finish the spar 20.
  • the main limiting factor is generally considered to be cost; carbon fibers, depending on grade typically cost 8-10 times more than E-glass.
  • blade sizes continue to increase, the weight and performance improvements make higher performance fibers increasingly viable.
  • carbon fibers also have other limitations. In particular although they have roughly twice the tensile strength of glass, they have barely the same compressive strength. Also their compressive fatigue performance is
  • the instant invention comprises pultruded rods comprising carbon fibers.
  • carbon fibers especially uni-axial, have lower diffusivity than glass and are significantly harder to infuse.
  • pre-preg which further increases cost and necessitates the use of heated molds.
  • Vacuum infusion is certainly the most used though pre-preg is gaining ground because of improved properties and consistency as well as the difficulty of using infusion with carbon.
  • Vacuum infusion typically involves laying up multiple layers of dry glass fabrics into a mold with peel ply, breather and flow media laid on top followed by a vacuum bag sealed all the way around the edges of the mold. Multiple feed ports are punctured through the vacuum bag at successive stations along its length. Infusion begins at one end and continues until the resin has been 'sucked' through the fabrics as far as it will go at which point the next vacuum port is opened and a further length infused, repeating until the complete part is filled. Vacuum infusion has many drawbacks and sources of
  • Pre-preg layup is often preferred for spars because the improved consistency and higher axial fiber loadings.
  • the pre-impregnated sheets of mainly uni-axial fibers are laid into the mold, already containing the optimum (or slight excess) of resin.
  • the laminate stack has a peel ply, perforated release film and breather applied over it and is vacuum bagged. Heat and pressure/vacuum is then applied to cure and consolidate the structure.
  • vacuum infusion is more commonly used in the prior art to produce the more geometrically complex, but less structurally critical blade shells while pre-preg is gaining ground for the manufacture of spar caps.
  • a number of manufacturing methods are viable in the instant invention. Although manual handling and placement of rods is possible (and in many ways easier than manual placement of fabrics) automatically or semi-automatically placing the rods is preferred. When the rods are positioned then they need to have the secondary matrix introduced, consolidated and cured. There are several possible options to do this. All three of the following techniques are believed to be feasible: (a) vacuum infusion; (b) B-stage coating of rods; and (c) rod laying machine with fast cure adhesive applied between layers.
  • the resin In prior art infusion, the resin must flow in the very small channels available between the reinforcement fibers. Since the fibers are of the order of 20 micrometers diameter and are forced together under vacuum this means that the individual flow paths for the resin are of a similar scale. A surface flow media is required to carry resin along the surface of the reinforcement for easier flow, and is then sucked down vertically/diagonally into the reinforcement. Even with this technique it is still necessary to have multiple vacuum feeds along the length of a spar, typically every 3 to 6 meters. The flow media and the multiple vacuum feeds both contribute to waste and possibility for inconsistency in the final part. The flow media and multiple vacuum lines and ports along the component are consumables, extra cost that is scrap once the part has been produced. The resin remaining in the flow media and lines is an additional expense.
  • the resin system is designed around the time required for infusion.
  • Ability to infuse faster can allow a faster reacting system to be utilized saving time on both the infusion step and the curing phase.
  • the presence of the pre-cured pultruded rods has the potential to act as a temperature stabilization mechanism.
  • When epoxy is processed in thick sections (such as blade roots) where the volume to surface area ratio is high there is always the danger of a runaway exotherm which can cause overheating and degradation of the matrix.
  • the presence of the pre-pultruded rods can help to prevent this as the rods minimize the concentrated volume of epoxy and act is internal heat sinks in the system.
  • a second option would be to use rectangular pultruded rods with a minimum coating of B-stage resin. This would allow closer packing of the rods and even higher properties.
  • the option of using rectangular rods is probably not so readily applicable if vacuum infusion is used as there is too great a risk of ending up with dry spots in the infusion where the rods push together.
  • the B-stage coating can easily be applied to the rods on site. This would eliminate the current shelf life / refrigeration issues that exist with current systems.
  • the application of the B stage resin to rods can be considerably simpler than preparation of conventional pre-preg. Once the desired shape and thickness of resin has been determined it can be applied in a process analogous to wire coating or over-extrusion coating. A line to apply a pre-coat of epoxy onto the rods can be easily established with a wire coating die and tube mandrel to ensure even coating thickness around the rod.
  • Vacuum infusion and B-stage coating are the first choices discussed above primarily because they are essentially modifications to prior art techniques already well known within the wind-blade industry and therefore can probably be implemented most readily. While vacuum infusion and B-stage coating methods according to the instant invention
  • the typical spars will utilize considerable lengths of the proposed small diameter rods.
  • a typical 1.5MW blade would use over half a million feet of rod in a full spar set.
  • a typical production time for a blade is around one day.
  • the following two options are suggested to achieve the required material: (a) conventional pultrusion with multiple exit stacked dies; and (b) to utilize u/v curing pultrusion which can operate significantly faster with line speeds up to 150 meters per minute or more.
  • the root joint is a critical component of the blade structure as it transfers all of the loads from the blade to the turbine. Root joints may be made as a separate component and subsequently joined to the spar and blade or may be produced integrally. Separate manufacturing is simpler and reduces the risk of defects but adds a critical bonding step.
  • a typical approach is to bond studs or 'T' bolts into holes drilled into the thick section of the root allowing the blade to be bolted onto the hub.
  • the root section is typically very thick, 10cm or more, and uses multiple bi-axial layers of reinforcement to match the complex stress states that are present in the hub. Since the applied loads are so high, it is important to maximize fiber continuity and minimize section changes which would cause stress concentrations.
  • Figs 11-14 depict the above-mentioned construction.
  • Fig. 11 is a side view showing the stud 24 and the rods 25.
  • Fig. 12 is a cross sectional view of the stud 24.
  • Fig. 13 is a cross sectional view of the construction at a location where the rods 25 surround the stud 24.
  • Fig. 14 is a cross sectional view of the construction at a location before the rods 25 surround the stud 24.
  • FIG. 15 shows a simplified cross sectional view of a wind blade 26 having an "I" section spar comprised of an upper spar cap 29, a lower spar cap 28, a spar web 30 and an airfoil skin 27.
  • chord-wise bending is less of an issue due to the large chord dimension, however as blades become larger and higher in aspect ratio chord-wise bending can become an issue.
  • the instant invention can be a relatively simple means to incorporate 'mini-spars' in the leading and trailing edges if necessary to improve chord-wise properties.
  • Such components could include rods incorporating strain sensors, hollow tubes to allow for in situ sensors such as accelerometers within the blade or conductive elements for lightening protection. These elements can be incorporated either by substituting them for an individual rod or by incorporating them directly into the pultrusion.
  • the instant invention is any spar or beam comprising a plurality of separate composite rods bonded together in a mold to form the spar or beam including but not limited to aircraft wings, aircraft rotors, marine spars, marine masts, and civil engineering applications such as bridge beams.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulding By Coating Moulds (AREA)
  • Wind Motors (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne une semelle de longeron composée d'une pluralité de tiges composites distinctes collées ensemble dans un moule pour former la semelle de longeron. L'invention concerne également un procédé de fabrication d'une semelle de longeron qui consiste à coller ensemble des tiges composites distinctes dans un moule, au moyen d'un agent de collage, pour former la semelle de longeron. De plus, l'invention concerne un système de production d'électricité qui comprend une installation d'éolienne conçue pour générer de l'électricité, l'éolienne comportant une pale, la pale présentant un longeron pourvu de semelles, et chaque semelle de longeron comprenant une pluralité de tiges composites pultrudées collées ensemble dans un moule pour former une semelle de longeron.
PCT/US2012/000252 2011-05-24 2012-05-23 Semelles de longeron pour pale d'éolienne Ceased WO2012161741A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161519520P 2011-05-24 2011-05-24
US61/519,520 2011-05-24

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WO2012161741A2 true WO2012161741A2 (fr) 2012-11-29
WO2012161741A3 WO2012161741A3 (fr) 2013-03-14

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Cited By (17)

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Publication number Priority date Publication date Assignee Title
WO2015058775A1 (fr) * 2013-10-25 2015-04-30 Vestas Wind Systems A/S Pales d'éolienne
WO2015142904A1 (fr) * 2014-03-19 2015-09-24 Korecarbon Llc Pale de turbine
US20160040651A1 (en) * 2014-08-07 2016-02-11 General Electric Company Methods of manufacturing rotor blades of a wind turbine
US9822761B2 (en) 2014-08-13 2017-11-21 General Electric Company Structural components and methods of manufacturing
DE102016009640A1 (de) * 2016-08-10 2018-02-15 Senvion Gmbh Gurt aus vorgefertigten Elementen mit Gelege und ein Verfahren zu seiner Fertigung
US9897065B2 (en) 2015-06-29 2018-02-20 General Electric Company Modular wind turbine rotor blades and methods of assembling same
DE102016013064A1 (de) * 2016-11-03 2018-05-03 Senvion Gmbh Rotorblatt mit gekrümmten Pultrudaten
FR3059935A1 (fr) * 2016-12-13 2018-06-15 Epsilon Composite Profile avec une bande d'arrachage
US10337490B2 (en) 2015-06-29 2019-07-02 General Electric Company Structural component for a modular rotor blade
US10527023B2 (en) 2017-02-09 2020-01-07 General Electric Company Methods for manufacturing spar caps for wind turbine rotor blades
US10677216B2 (en) 2017-10-24 2020-06-09 General Electric Company Wind turbine rotor blade components formed using pultruded rods
US10738759B2 (en) 2017-02-09 2020-08-11 General Electric Company Methods for manufacturing spar caps for wind turbine rotor blades
US11738530B2 (en) 2018-03-22 2023-08-29 General Electric Company Methods for manufacturing wind turbine rotor blade components
US20240068437A1 (en) * 2020-12-30 2024-02-29 Lm Wind Power A/S Hybrid pultrusion plates for a conductive spar cap of a wind turbine blade
US12365120B2 (en) 2019-07-16 2025-07-22 Ge Infrastructure Technology Llc System and method for manufacturing panels for use in wind turbine rotor blade components
US12377617B2 (en) 2019-07-16 2025-08-05 Ge Vernova Infrastructure Technology Llc System and method for manufacturing panels for use in wind turbine rotor blade components
EP4667738A1 (fr) * 2024-06-18 2025-12-24 LM Wind Power A/S Coque de pale d'éolienne à répartition de charge améliorée

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10336461A1 (de) * 2003-08-05 2005-03-03 Aloys Wobben Verfahren zur Herstellung eines Rotorblattes einer Windenergieanlage
US20050186081A1 (en) * 2004-02-24 2005-08-25 Mohamed Mansour H. Wind blade spar cap and method of making
US7758313B2 (en) * 2006-02-13 2010-07-20 General Electric Company Carbon-glass-hybrid spar for wind turbine rotorblades
US7976282B2 (en) * 2007-01-26 2011-07-12 General Electric Company Preform spar cap for a wind turbine rotor blade

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015058775A1 (fr) * 2013-10-25 2015-04-30 Vestas Wind Systems A/S Pales d'éolienne
US10688738B2 (en) 2013-10-25 2020-06-23 Vestas Wind Systems A/S Wind turbine blades
WO2015142904A1 (fr) * 2014-03-19 2015-09-24 Korecarbon Llc Pale de turbine
CN106103984A (zh) * 2014-03-19 2016-11-09 科尔卡伯恩有限责任公司 涡轮机叶片
US10533535B2 (en) 2014-03-19 2020-01-14 Korecarbon Llc Turbine blade
US20160040651A1 (en) * 2014-08-07 2016-02-11 General Electric Company Methods of manufacturing rotor blades of a wind turbine
US9822761B2 (en) 2014-08-13 2017-11-21 General Electric Company Structural components and methods of manufacturing
DK179320B1 (en) * 2014-08-13 2018-04-30 Gen Electric PROCEDURES FOR MANUFACTURING A STRUCTURAL COMPONENT
US10337490B2 (en) 2015-06-29 2019-07-02 General Electric Company Structural component for a modular rotor blade
US9897065B2 (en) 2015-06-29 2018-02-20 General Electric Company Modular wind turbine rotor blades and methods of assembling same
DE102016009640A1 (de) * 2016-08-10 2018-02-15 Senvion Gmbh Gurt aus vorgefertigten Elementen mit Gelege und ein Verfahren zu seiner Fertigung
DE102016013064A1 (de) * 2016-11-03 2018-05-03 Senvion Gmbh Rotorblatt mit gekrümmten Pultrudaten
WO2018109297A1 (fr) * 2016-12-13 2018-06-21 Epsilon Composite Profile avec une bande d'arrachage
FR3059935A1 (fr) * 2016-12-13 2018-06-15 Epsilon Composite Profile avec une bande d'arrachage
US10527023B2 (en) 2017-02-09 2020-01-07 General Electric Company Methods for manufacturing spar caps for wind turbine rotor blades
US10738759B2 (en) 2017-02-09 2020-08-11 General Electric Company Methods for manufacturing spar caps for wind turbine rotor blades
US10677216B2 (en) 2017-10-24 2020-06-09 General Electric Company Wind turbine rotor blade components formed using pultruded rods
US11738530B2 (en) 2018-03-22 2023-08-29 General Electric Company Methods for manufacturing wind turbine rotor blade components
US12365120B2 (en) 2019-07-16 2025-07-22 Ge Infrastructure Technology Llc System and method for manufacturing panels for use in wind turbine rotor blade components
US12377617B2 (en) 2019-07-16 2025-08-05 Ge Vernova Infrastructure Technology Llc System and method for manufacturing panels for use in wind turbine rotor blade components
US20240068437A1 (en) * 2020-12-30 2024-02-29 Lm Wind Power A/S Hybrid pultrusion plates for a conductive spar cap of a wind turbine blade
EP4667738A1 (fr) * 2024-06-18 2025-12-24 LM Wind Power A/S Coque de pale d'éolienne à répartition de charge améliorée
WO2025262051A1 (fr) * 2024-06-18 2025-12-26 Lm Wind Power A/S Coque de pale d'éolienne à répartition de charge améliorée

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