DE102011051172A1 - Laminated rotor blade for wind turbine, has several pultrusion portions that are arranged at surface of insert portion, and are coated with fiber or woven fabric tube that is longer than that of insert portion - Google Patents
Laminated rotor blade for wind turbine, has several pultrusion portions that are arranged at surface of insert portion, and are coated with fiber or woven fabric tube that is longer than that of insert portion Download PDFInfo
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- DE102011051172A1 DE102011051172A1 DE102011051172A DE102011051172A DE102011051172A1 DE 102011051172 A1 DE102011051172 A1 DE 102011051172A1 DE 102011051172 A DE102011051172 A DE 102011051172A DE 102011051172 A DE102011051172 A DE 102011051172A DE 102011051172 A1 DE102011051172 A1 DE 102011051172A1
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- rotor blade
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- connection element
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- 239000000835 fiber Substances 0.000 title claims abstract description 62
- 239000002759 woven fabric Substances 0.000 title abstract 2
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- 238000005259 measurement Methods 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 8
- 239000011151 fibre-reinforced plastic Substances 0.000 description 8
- 238000003475 lamination Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 3
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- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
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- 235000020004 porter Nutrition 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 102000012498 secondary active transmembrane transporter activity proteins Human genes 0.000 description 1
- 108040003878 secondary active transmembrane transporter activity proteins Proteins 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
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
- F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
-
- 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
- F05B2250/00—Geometry
- F05B2250/60—Structure; Surface texture
-
- 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
- F05B2280/6001—Fabrics
-
- 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
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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)
Abstract
Description
Die Erfindung betrifft ein neuartiges laminiertes Rotorblatt für Windenergieanlagen mit einem Befestigungssystem für Rotorblätter an der Rotornabe mittels eingearbeiteten Inserts im Rotorblattfuß oder in Rotorblattteilen.The invention relates to a novel laminated rotor blade for wind energy plants with a fastening system for rotor blades on the rotor hub by means of incorporated inserts in the rotor blade root or in rotor blade parts.
Zum derzeitigen Stand der Technik zählen Windenergieanlagen zur Energieerzeugung mit vorrangig horizontaler Drehachse bei der an einer Nabe in der Regel 3 Rotorblätter befestigt sind. Die Weiterentwicklung von Windenergieanlagen ist durch eine ständige Effizienzsteigerung, insbesondere durch eine erhebliche Vergrößerung der erzeugten elektrischen Leistung gekennzeichnet. Die mögliche Leistung einer Windenergieanlage ist hierbei direkt von Durchmesser des Rotors und somit direkt von der Größe der an der Nabe befestigten Rotorblätter abhängig. Da zunehmend Windkraftanlagen auch in Offshore Windparks auf hoher See aufgestellt werden und diese Rotorblätter durchaus vermehrt orkanartigen Stürmen ausgesetzt sein können, sind sowohl die Rotorblätter als auch die Verbindung zwischen Rotorblatt und Nabe erhöhten wechselnden Belastungen ausgesetzt. Bei den, im Laufe der ständigen Weiterentwicklung immer größer werdenden Rotorblättern, welche in der Regel aus faserverstärkten Kunststoff gefertigt sind, treten an der Befestigungsstelle des Rotorblattes mit der zur Nabe sehr große Kräfte auf. Diese Kräfte sind im wesentlichen auf die auftretenden Biegemomente infolge des aerodynamisch erzeugten Auftriebs, auf den Staudruck des anliegenden Windes und auf das Eigengewicht der Rotorblätter zurückzuführen. Die als Rotorblattanschluss bezeichnete Befestigungsstelle von Rotorblatt und Nabe hat nun die Aufgabe diese ständig wechselnden Scher-, Biege- und Torsionsbelastungen sicher und langdauernd aufzunehmen. Der Dauerfestigkeit an dieser Stelle kommt daher eine herausragende Bedeutung zu. Auf der einen Seite besteht hier die Forderung immer leichter zu bauen und auf der anderen Seite die Bruchfestigkeit weiter zu erhöhen. So darf es keinesfalls passieren, das Rotorblätter brechen und diese oder Teile davon, vor allem bei Aufstellungsorten in der Nähe von Besiedelungen, durch Stürme durch die Luft transportiert werden können. The current state of the art includes wind turbines for power generation with priority horizontal axis of rotation are attached to a hub usually three rotor blades. The further development of wind turbines is characterized by a constant increase in efficiency, in particular by a significant increase in the electrical power generated. The possible power of a wind turbine here depends directly on the diameter of the rotor and thus directly on the size of the rotor blades attached to the hub. As wind turbines are increasingly being installed in offshore wind farms on the high seas and these rotor blades can be increasingly exposed to hurricane-like storms, both the rotor blades and the connection between the rotor blade and the hub are subject to increased alternating loads. When, in the course of continuous development ever-increasing rotor blades, which are usually made of fiber-reinforced plastic, occur at the attachment point of the rotor blade with the hub to the very large forces. These forces are mainly due to the bending moments occurring due to the aerodynamically generated buoyancy, the dynamic pressure of the adjacent wind and the weight of the rotor blades. The designated as rotor blade attachment point of rotor blade and hub now has the task of these constantly changing shear, bending and torsional loads safely and long lasting record. The fatigue strength at this point is therefore of paramount importance. On the one hand, the demand is always easier to build and on the other hand to further increase the breaking strength. So it must not happen, the rotor blades break and these or parts of them, especially at sites near colonization, can be transported by storms through the air.
Zur Ausbildung des Rotorblattanschlusses sind aus dem Stand der Technik eine Reihe verschiedener Lösungsansätze bekannt. Allen gebräuchlichen Lösungen ist gemeinsam, dass im zumeist kreisrunden oder gegebenenfalls auch elliptischen, flanschartigen Ende des Rotorblatts in axialer Richtung kreisringartig mit einer Serie von mehr oder minder groß dimensionierten Gewindebolzen im Rotorblatt angeordnet und verankert werden. Durch diese Gewindebolzen kann dann das Rotorblatt mit der Nabe bzw. mit dem Blattlager mechanisch fest verbunden werden. Die bisherigen technischen Lösungen unterscheiden sich hierbei im wesentlichen in der Art und Weise der Befestigung der einzelnen Gewindebolzen im Rotorblatt.To form the rotor blade connection, a number of different approaches are known from the prior art. All common solutions have in common that are arranged and anchored in the axial direction annularly with a series of more or less large-sized threaded bolt in the rotor blade in the mostly circular or possibly elliptical, flange-like end of the rotor blade. By means of these threaded bolts, the rotor blade can then be mechanically firmly connected to the hub or to the blade bearing. The previous technical solutions differ essentially in the manner of attachment of the individual threaded bolt in the rotor blade.
So besteht, wie beispielsweise in
Eine weitere verbreitete Möglichkeit in der Ausgestaltung von Rotorblattanschlüssen besteht in der Verwendung von metallischen kreisringartig angeordneten Inserts, welche in das Laminat des Rotorblattes selbst eingebettet sind. In die, in axialer Richtung zum Rotorblatt ausgerichteten Inserts werden die Gewindebolzen zur späteren Montage mit der Nabe geschraubt. Die Einbettung der Inserts in das Laminat des Rotorblattes erfolgt, je nach Lösung durch Einkleben oder Einlaminieren. Eine solche Lösung wird in
Dies ist von erheblichem Nachteil da kein direkter Formschluss zwischen metallischem Insert und faserverstärkten Kunststoff besteht. Hierdurch ist es möglich, dass die Verklebung infolge ständig wechselnder dynamischer Belastung oder Alterung plötzlich versagt. Es wird in dieser technischen Lösung zwar auf eine mögliche Gestaltung der Außenfläche des Inserts mit Widerhaken oder zusätzlichen radialen Flaschen hingewiesen, jedoch wird eine glatte Außenfläche eindeutig bevorzugt. Dies hat den Grund, dass sich das Laminat des Rotorblattes nur schwer an Formschlusselemente des Inserts anschmiegt und mit herkömmlichen Methoden es kaum möglich ist eine Vielzahl von geeigneten Formschlusselementen effizient und kostengünstig herzustellen.This is a considerable disadvantage since there is no direct positive connection between the metallic insert and the fiber-reinforced plastic. This makes it possible that the bond suddenly fails due to constantly changing dynamic load or aging. Although it is pointed out in this technical solution on a possible design of the outer surface of the insert with barbs or additional radial bottles, but a smooth outer surface is clearly preferred. This has the reason that the laminate of the rotor blade is difficult to conform to form-fitting elements of the insert and with conventional methods, it is hardly possible to produce a variety of suitable form-locking elements efficiently and inexpensively.
Eine weitere ähnliche Lösung wird in
Im
Im
Eine weitere Möglichkeit der Rotorblattbefestigung besteht in der Verwendung eines ringförmigen Flansches oder Inserts, welcher ungefähr den Durchmesser des Rotorblattfußes besitzt und im Ganzen durch Laminieren oder Verkleben mit dem Rotorblattkörper verbunden wird. In dem metallischen Flansch befinden sich dann die axialen Bohrungen zur Aufnahme einer Reihe von Gewindebolzen. Diese Methode ist für die immer größer werdenden Rotorblätter nicht mehr praktikabel einsetzbar, da der metallische Flansch dann einen Durchmesser von mehreren Metern haben muss und dadurch sehr schwer und teuer wird. Ein Beispiel hierzu zeigt
Der Erfindung liegt die Aufgabe zu Grunde ein neuartiges laminiertes Rotorblatt für Windenergieanlagen zu schaffen, dass eine konstruktiv einfachere Befestigung von Rotorblättern an der Nabe bzw. auch eine Teilung von Rotorblättern in zwei oder mehrere Rotorblattteile ermöglicht, wobei die Befestigung eines Rotorblattes an der Nabe einer Windenergieanlage mit weniger Materialeinsatz als bisher erfolgen kann, der Befestigung alle Sicherheitsvorschriften erfüllt eine höhere Lebensdauer der Verbindung als bisher gewährleistet, kürzere Montagezeiten ermöglicht und dass Rotorblatt bzw. die Rotorblattteile kostengünstiger herstellbar sind.The invention is based on the object to provide a novel laminated rotor blade for wind turbines, that allows a structurally simpler attachment of rotor blades on the hub or a division of rotor blades into two or more rotor blade parts, wherein the attachment of a rotor blade to the hub of a wind turbine can be done with less use of materials than before, the attachment meets all safety requirements a longer life of the connection than previously guaranteed, allows shorter installation times and that rotor blade or the rotor blade parts are cheaper to produce.
Die Aufgabe wird erfindungsgemäß durch die Merkmale des ersten Patentanspruches gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Unteransprüchen beschrieben. Das neuartige laminierte Rotorblatt
Das Blattanschlusselement
Bevorzugt bestehen das bzw. die Inserts
Am kostengünstigsten ist es, wenn das gesamte Insert
Bevorzugt ist der Querschnitt des Inserts
Die erfindungsgemäße Ausführung des Blattanschlusselement
Wahlweise kann das Blattanschlusselement
Von Vorteil ist es, wenn beim erfindungsgemäßen Blattanschlusselement
Es ist auch möglich, dass das Rotorblatt
In einer bestimmten Variante des Blattanschlusselementes
Von besonderem Vorteil ist es, wenn beim Blattanschlusselement
Die erfindungsgemäße Struktur der Erhebungen oder Noppen
Die Größe, Form und die Zwischenräume der Erhebungen oder Noppen
Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen mit Bezugnahme auf die zugehörigen Zeichnungen. Further details, features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings.
In
In
In
In
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Blattanschlusselement Blade attachment element
- 22
- Insert insert
- 33
- Innere Befestigungsmöglichkeit Inner mounting option
- 44
- Insertkörper insert body
- 55
- Insertkopf insert head
- 66
- Verbindungsbereich connecting area
- 77
- Pultrusionsprofil pultrusion
- 88th
- Erhebungen oder Noppen Elevations or pimples
- 99
- Faser- oder Gewebeschlauch Fiber or fabric hose
- 1010
- Bohrung drilling
- 1111
- Innengewinde inner thread
- 1212
- Schubstege load webs
- 1313
- Kreisringanordnung Annular arrangement
- 1414
- Rotorblatt rotor blade
- 1515
- Rotorblattfuß Rotorblattfuß
- 1616
- Rotorblattteil Rotor blade part
- 1717
- Lastträger porters
- 1818
- Obergurt upper chord
- 1919
- Untergurt lower chord
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- WO 01/42647 A3 [0004] WO 01/42647 A3 [0004]
- DE 1973372 A1 [0004] DE 1973372 A1 [0004]
- DE 602004008070 T2 [0005] DE 602004008070 T2 [0005]
- DE 102008021498 A1 [0007] DE 102008021498 A1 [0007]
- US 4420354 [0008] US 4420354 [0008]
- US 4915590 [0009] US 4915590 [0009]
- DE 10214340 A1 [0010] DE 10214340 A1 [0010]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102011051172A DE102011051172A1 (en) | 2011-06-17 | 2011-06-17 | Laminated rotor blade for wind turbine, has several pultrusion portions that are arranged at surface of insert portion, and are coated with fiber or woven fabric tube that is longer than that of insert portion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011051172A DE102011051172A1 (en) | 2011-06-17 | 2011-06-17 | Laminated rotor blade for wind turbine, has several pultrusion portions that are arranged at surface of insert portion, and are coated with fiber or woven fabric tube that is longer than that of insert portion |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102011051172A1 true DE102011051172A1 (en) | 2012-12-20 |
Family
ID=47228185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011051172A Withdrawn DE102011051172A1 (en) | 2011-06-17 | 2011-06-17 | Laminated rotor blade for wind turbine, has several pultrusion portions that are arranged at surface of insert portion, and are coated with fiber or woven fabric tube that is longer than that of insert portion |
Country Status (1)
Country | Link |
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DE (1) | DE102011051172A1 (en) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014108591A1 (en) * | 2013-01-10 | 2014-07-17 | Ingenieria Prosix, S. L. | Fixation for a wind turbine blade to the hub |
WO2015124568A1 (en) * | 2014-02-18 | 2015-08-27 | Lm Wp Patent Holding A/S | Wind turbine blade bushing system |
DE102014215390B3 (en) * | 2014-08-05 | 2015-11-05 | Bayerische Motoren Werke Aktiengesellschaft | Arrangement with a metallic connection element and a fiber composite material |
DE102014008558A1 (en) | 2014-05-28 | 2015-12-03 | Windnovation Engineering Solutions Gmbh | Rotor blade connection |
EP2952735A1 (en) * | 2014-06-05 | 2015-12-09 | Siemens Aktiengesellschaft | A root bushing for a wind turbine rotor blade, a wind turbine rotor blade, a wind turbine and a method for manufacturing a wind turbine rotor blade for a wind turbine |
DE102016214366A1 (en) | 2016-08-03 | 2018-02-08 | Bayerische Motoren Werke Aktiengesellschaft | A method of making an assembly having a fiber composite structure and a load introduction member |
US9897065B2 (en) | 2015-06-29 | 2018-02-20 | General Electric Company | Modular wind turbine rotor blades and methods of assembling same |
US9970304B2 (en) | 2015-07-22 | 2018-05-15 | General Electric Company | Rotor blade root assembly for a wind turbine |
US10060411B2 (en) | 2015-07-22 | 2018-08-28 | General Electric Company | Rotor blade root assembly for a wind turbine |
US10072632B2 (en) | 2015-06-30 | 2018-09-11 | General Electric Company | Spar cap for a wind turbine rotor blade formed from pre-cured laminate plates of varying thicknesses |
US10077758B2 (en) | 2015-06-30 | 2018-09-18 | General Electric Company | Corrugated pre-cured laminate plates for use within wind turbine rotor blades |
US10107257B2 (en) | 2015-09-23 | 2018-10-23 | General Electric Company | Wind turbine rotor blade components formed from pultruded hybrid-resin fiber-reinforced composites |
US10113532B2 (en) | 2015-10-23 | 2018-10-30 | General Electric Company | Pre-cured composites for rotor blade components |
US20180372062A1 (en) * | 2017-06-27 | 2018-12-27 | General Electric Company | Root insert and a wind turbine having wind turbine blades with root inserts |
US10337490B2 (en) | 2015-06-29 | 2019-07-02 | General Electric Company | Structural component for a modular rotor blade |
US10422316B2 (en) | 2016-08-30 | 2019-09-24 | General Electric Company | Pre-cured rotor blade components having areas of variable stiffness |
EP3557041A1 (en) * | 2018-04-16 | 2019-10-23 | Nordex Energy GmbH | Sleeve for a wind energy assembly rotor blade, flange inserter, wind energy assembly rotor blade and wind turbine |
US10626847B2 (en) | 2017-01-05 | 2020-04-21 | General Electric Company | Method for manufacturing a wind turbine rotor blade root section with pultruded rods and associated wind turbine blade |
US10677216B2 (en) | 2017-10-24 | 2020-06-09 | General Electric Company | Wind turbine rotor blade components formed using pultruded rods |
EP4092261A1 (en) | 2021-05-21 | 2022-11-23 | Nordex Energy SE & Co. KG | A wind turbine rotor blade element with connection assemblies |
CN115898753A (en) * | 2022-12-01 | 2023-04-04 | 中材科技风电叶片股份有限公司 | Blade, impeller and wind power generation device |
US11738530B2 (en) | 2018-03-22 | 2023-08-29 | General Electric Company | Methods for manufacturing wind turbine rotor blade components |
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DE102008021498A1 (en) | 2008-04-29 | 2009-11-05 | Repower Systems Ag | Method for manufacturing a blade connection of a rotor blade, a blade connection and a fastening element for a blade connection |
-
2011
- 2011-06-17 DE DE102011051172A patent/DE102011051172A1/en not_active Withdrawn
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US4420354A (en) | 1982-06-14 | 1983-12-13 | Gougeon Brothers, Inc. | Process for securing projecting studs in the ends of wood resin composite bodies and the like and the structure formed thereby |
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Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
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