US20120315143A1 - Rotor blade for a wind turbine - Google Patents

Rotor blade for a wind turbine Download PDF

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Publication number
US20120315143A1
US20120315143A1 US13/490,655 US201213490655A US2012315143A1 US 20120315143 A1 US20120315143 A1 US 20120315143A1 US 201213490655 A US201213490655 A US 201213490655A US 2012315143 A1 US2012315143 A1 US 2012315143A1
Authority
US
United States
Prior art keywords
rotor blade
connecting elements
blade according
wind turbine
connecting element
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.)
Abandoned
Application number
US13/490,655
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English (en)
Inventor
Erik Grove-Nielsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=44644905&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20120315143(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Assigned to SIEMENS WIND POWER A/S reassignment SIEMENS WIND POWER A/S ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GROVE-NIELSEN, ERIK
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS WIND POWER A/S
Publication of US20120315143A1 publication Critical patent/US20120315143A1/en
Priority to US14/816,542 priority Critical patent/US9410529B2/en
Abandoned 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
    • 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
    • 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
    • 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
    • F03D1/0691—Rotors characterised by their construction elements of the hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/40—Use of a multiplicity of similar components
    • 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
    • F05B2240/80—Platforms for stationary or moving 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
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • 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
    • 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
    • Y02E10/728—Onshore wind turbines

Definitions

  • a rotor blade for a wind turbine having an elongate blade base body with a number of connecting elements each comprising at least one axially extending connecting portion adapted to be connected with corresponding connecting portions of a rotor hub of a wind turbine is provided
  • Rotor blades for wind turbine are usually built as fibre-reinforced hollow composite structures. Hence, they are usually fabricated by impregnating respective aligned and orientated fibres or fibre clutches with a casting or resin material respectively. Thereby, removing of the cast rotor blade is oftentimes problematic since particularly in the region of the ring-like shaped root of the blade ovalisation may occur due to the self-weight of the rotor blade. Respective ovally shaped or deformed rotor blades are difficult to machine and particularly difficult to mount on a respective rotor hub of a wind turbine.
  • a rotor blade having a constructively simple design with enhanced mechanical properties in the region of the blade root.
  • a rotor blade is described, wherein the connecting elements are connected in circumferential direction so as to build a closed ring-shape.
  • the present technique is based on the idea to provide the blade root with respective circumferentially disposed and circumferentially connected or interconnected connecting elements which connecting elements build a closed ring or ring-like shape when connected.
  • the respective ring built of the respective, particularly ring-segment-shaped, connecting elements is disposed in the region of the blade root.
  • the respective ring built of the respective connecting elements provides the blade root with mechanical stability so that ovalisation effects originating from the self-weight of the rotor blade may be avoided or at least reduced.
  • the connecting elements which may be deemed as studs or the like, are easily attached in the mould for manufacturing the rotor blade. There is no need to insert respective axial spacer bars or the like between the connecting elements. Hence, the manufacturing process of respective rotor blades is easier.
  • the number of the respective connecting elements is at least two, so that each of the connecting elements extends about an angle of 180° in this case.
  • each connecting element depends about an angle of 360°/n, whereby n is the number of the respective connecting elements.
  • the connecting elements are not uniformly shaped, so that first connecting elements extend about a first angle and second connecting elements extend about a second angle, whereby all respective first and second connecting elements build a ring when connected.
  • Each connecting element may comprise at least one circumferentially extending connecting means for interconnecting the respective connecting elements with a corresponding circumferentially extending connecting means of at least one adjacently disposed connecting element.
  • the circumferentially extending connecting means provides a mechanically stable connection regarding the joint of respective circumferentially adjacently disposed connecting elements.
  • the connection may be non-detachable or detachable, whereby the latter case eases maintenance and handling of the respective connecting elements.
  • each connecting element comprises at least one radially extending connecting means for connecting a respective connecting element with a corresponding radially extending connecting means of at least one ring number having a radially outer and/or inner position with respect to the connecting elements.
  • the at least one ring member provides the arrangement of the circumferentially aligned connection members with mechanical stability since each of the connecting members is firmly connected to the respective ring member by at least one radially extending connecting means.
  • the respective ring members may be radially adjacently disposed to the respective connecting elements so that the ring members are directly contacted with the radial outer and/or inner diameter of the respective connecting elements.
  • the connecting elements are both connected to a radially outer ring member and a radially inner ring member, i.e. the connecting members are disposed in between the radially outer ring member and the radially inner ring member, a sandwich construction is given.
  • the ring members serve as stiff outer layers and the connecting elements serve as a respective intermediate layer disposed in between the outer layers.
  • Respective sandwich structures provide high bending stiffness, so that the blade root may be provided with additional mechanical stability.
  • the circumferentially extending and/or radially extending connecting means may be built as a form closure element.
  • Form closure elements allow both non-detachable and detachable connections of respective joining partners in dependence of the constructive design of the respective connecting means.
  • the form closure elements provide mechanical stable connections of respective joining partners, i.e. the connecting elements among each other and/or the connecting elements and the respective ring members.
  • the form closure elements may be built as a protrusion or a corresponding recess in the most general embodiment. Specific geometries of the form closure elements such as dove tail-like protrusions or dove tail-like recesses are merely of exemplary nature. It is understood that other shapes of protrusions and corresponding recesses, allowing respective snap-fit connections for instance, are applicable as well.
  • the circumferentially extending connecting means is adjacently disposed to the radially outer or inner boarder of a respective connecting element with respect to the centre axis of the rotor blade.
  • the concrete radial location of the circumferentially extending connecting means may lead to differences in the mechanical stability of the circumferentially connection of the respective connecting elements.
  • Concerning a single connecting element, radially outer positions of the circumferentially arranged connecting means provide higher bending stiffness.
  • a respective connecting element may have a symmetrical or an asymmetrical shape with respect to its circumferentially aligned longitudinal axis.
  • the circumferentially aligned longitudinal axis is defined as the mean line circumferentially extending through the respectively connected connecting elements.
  • respective connecting elements are three-dimensional components extending in axial, circumferentially and radial direction, whereby the outer contour of the connecting element is mainly defined by the respective outer contour of the rotor blade.
  • the connecting elements may be differently shaped as long as they build an at least essentially ring-like shape when connected in order to provide the blade root with additional mechanical stability.
  • the present invention relates to a wind turbine, particularly a direct drive wind turbine, comprising a rotor hub having at least one rotor blade attached thereto.
  • the rotor blade is of the type as has been described before.
  • FIG. 1 shows a principle view of a rotor blade according to an exemplary embodiment of the invention
  • FIG. 2 shows a principle view of a face side of the rotor blade of FIG. 1 ;
  • FIG. 3 shows a perspective view of a connecting element according to an exemplary embodiment of the invention
  • FIG. 4-7 show cross-sectional views of further connecting elements according to exemplary embodiments of the invention.
  • FIG. 8 shows a partial cut-view of a face side of a rotor blade according to an exemplary embodiment of the invention.
  • FIG. 9 shows a perspective view of the connecting element of FIG. 8 .
  • FIG. 1 shows a principle view of a rotor blade 1 according to an exemplary embodiment of the invention.
  • the rotor blade 1 comprises an elongate base body 2 which axially ends in a respective blade root 3 having a respective circular root face side 4 (cf. FIG. 2 ).
  • the rotor blade 1 is a hollow component made of a fibre-reinforced resin or cast material.
  • the rotor blade 1 is attachable to a rotor hub of a wind turbine, particularly a direct drive wind turbine (not shown).
  • the face side 4 of the blade root 3 has a ring-like shape, whereby respective connecting elements 5 (cf. FIG. 3 ) are connected in circumferential direction so as to build a circumferentially closed ring-shape.
  • a respective connecting element 5 comprises an axially extending base body 6 having an axially extending connecting portion 7 in the shape of a threaded hole.
  • the axially extending connecting portion 7 is adapted to be connected with corresponding connecting portions of a rotor hub of a wind turbine (not shown).
  • the axially extending connecting portion is built as bore having an inner thread, the corresponding connecting portion of the rotor hub is a threaded bolt.
  • the base body 6 is provided with circumferentially extending connecting means in the shape of form closure elements, ie a protrusions 8 and corresponding recesses 9 .
  • the respective connecting elements 5 may be circumferentially connected so as to build the closed ring as is shown in FIG. 2 .
  • both the protrusion 8 and the recess 9 are shaped as corresponding dove tails. It is understood that the circumferentially connecting means of the respective connecting elements 5 may be shaped differently shaped corresponding form closure elements as well.
  • FIGS. 4 to 7 show cross-sectional views of connecting elements 5 according to exemplary embodiments of the invention.
  • the embodiment shown in FIG. 4 shows c a respective connecting element 5 having a comparatively narrow single dove tail as a protrusion 8 and corresponding recess 9 .
  • the connecting element 5 is highly symmetrical with respect to its circumferentially aligned longitudinal axis ( 10 ).
  • FIG. 5 shows a like embodiment of a respective connecting element 5 , whereby the protrusion 8 and the recess 9 are enlarged.
  • the connecting element 5 is highly symmetrical with respect to its circumferentially aligned longitudinal axis ( 10 ).
  • FIG. 6 shows that a connecting element 5 may comprise more than two respective protrusions 8 and accordingly recesses 9 on the respective circumferentially sides.
  • the connecting element 5 is provided with respective protrusions 8 and recesses 9 in radially outer and radially inner positions, i.e. the respective protrusions 8 and recesses 9 are disposed at the radially inner and outer boarders of the connecting elements 5 .
  • the connecting element 5 of FIG. 6 is also symmetrical
  • FIG. 7 shows an embodiment of the respective connecting element 5 having an asymmetrical shape with respect to its circumferentially aligned longitudinal axis 10 .
  • the radially inner diameter of the connecting element 5 is provided with a radially inwardly extending curved shape of jut.
  • FIG. 8 shows a partial cut-view of a face side 4 of a rotor blade 1 according to an exemplary embodiment of the invention.
  • the connecting element 5 is disposed between an inner ring member 11 and an outer ring member 12 , so that the entire construction of the blade root 3 of the rotor blade 1 may be deemed as a sandwich construction.
  • the respective ring members 11 , 12 serve as outer layers
  • the connecting element 5 serves as an intermediate layer in between the outer layers.
  • This embodiment provides high bending stiffness, since the respective rings 11 , 12 are made of a highly stiff material such as steel or the like.
  • the connection between the ring members 11 , 12 and the connecting element 5 is provided by radially extending connecting means, i.e. respective radially extending protrusions 8 in the shape of knobs extending in respective radially extending recesses 9 within the ring members 11 , 12 . In such a manner, shear forces between the ring members 11 , 12 and the connecting element 5 may be encountered.
  • FIG. 9 shows a respective perspective view of the connecting element 5 of FIG. 8 clearly indicating the respective protrusions 8 in the shape of knobs radially extending off the outer diameter of the connecting element 5 .
  • the inner diameter of the connecting element 5 is likewise provided with respective protrusions 8 .
  • the inventive principle allows mechanical strengthening of the root blade 3 of a respective rotor blade 1 so that the occurrence of ovalisation effects due to the self-weight of the rotor blade 1 after its manufacturing process may be reduced or inhibited.
  • the attachment of respective rotor blades 1 to a rotor hub of a wind turbine is facilitated since the circular shape of the blade root 3 of the rotor blade 1 may be kept in its original state, ie geometric deviations may be avoided.

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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)
  • Wind Motors (AREA)
US13/490,655 2011-06-10 2012-06-07 Rotor blade for a wind turbine Abandoned US20120315143A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/816,542 US9410529B2 (en) 2011-06-10 2015-08-03 Rotor blade for a wind turbine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11169517.7A EP2532880B1 (fr) 2011-06-10 2011-06-10 Pale de rotor pour éolienne
EPEP11169517 2011-06-10

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/816,542 Continuation US9410529B2 (en) 2011-06-10 2015-08-03 Rotor blade for a wind turbine

Publications (1)

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US20120315143A1 true US20120315143A1 (en) 2012-12-13

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ID=44644905

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Application Number Title Priority Date Filing Date
US13/490,655 Abandoned US20120315143A1 (en) 2011-06-10 2012-06-07 Rotor blade for a wind turbine
US14/816,542 Active US9410529B2 (en) 2011-06-10 2015-08-03 Rotor blade for a wind turbine

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/816,542 Active US9410529B2 (en) 2011-06-10 2015-08-03 Rotor blade for a wind turbine

Country Status (4)

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US (2) US20120315143A1 (fr)
EP (1) EP2532880B1 (fr)
CN (1) CN102817792B (fr)
DK (1) DK2532880T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2952734A1 (fr) * 2014-06-05 2015-12-09 Siemens Aktiengesellschaft Chemise de protection pour une emplanture d'aube de rotor de turbine éolienne, pied de pale, pale de rotor de turbine éolienne et éolienne
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
US11339761B2 (en) 2016-12-29 2022-05-24 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. Bolt sleeve connector, blade and manufacturing method thereof and wind turbine generator system
EP3853444A4 (fr) * 2018-09-21 2022-06-08 TPI Composites, Inc. Système de fixation de pied de pale d'éolienne et procédé de fabrication

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Publication number Priority date Publication date Assignee Title
EP2963282B1 (fr) * 2014-07-04 2018-10-24 Siemens Aktiengesellschaft Dispositif à anneau de montage pour une éolienne
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
JP6475767B2 (ja) * 2017-02-09 2019-02-27 三菱重工業株式会社 風車翼、及び風車翼の補強方法
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
EP3730779A1 (fr) * 2019-04-25 2020-10-28 Siemens Gamesa Renewable Energy A/S Système de tuyauterie de transmission de fluide pour pale de rotor d'éolienne
US20220282699A1 (en) * 2019-07-08 2022-09-08 General Electric Company A segmented rotor blade for a wind turbine and methods for joining the same

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US20120045343A1 (en) * 2009-02-16 2012-02-23 Vestas Wind Systems A/S Rotor blade for a wind turbine and a method for making the same

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ES2285123T3 (es) * 2002-01-11 2007-11-16 Fiberline A/S Procedimiento para la produccion de un elemento estructural reforzado con fibra.
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EP2182201B1 (fr) * 2008-11-03 2016-01-13 Siemens Aktiengesellschaft Fondation particulièrement pour une éolienne et éolienne
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Publication number Priority date Publication date Assignee Title
US4915590A (en) * 1987-08-24 1990-04-10 Fayette Manufacturing Corporation Wind turbine blade attachment methods
WO2009132612A1 (fr) * 2008-04-29 2009-11-05 Repower Systems Ag Procédé de fabrication d'un raccord de pale de rotor, raccord de pale et élément de fixation pour un raccord de pale
US20110044817A1 (en) * 2008-04-29 2011-02-24 Urs Bendel Method for Establishing A Blade Connection of a Rotor Blade, A Blade Connection and a Securing Element for a Blade Connection
US20120045343A1 (en) * 2009-02-16 2012-02-23 Vestas Wind Systems A/S Rotor blade for a wind turbine and a method for making the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2952734A1 (fr) * 2014-06-05 2015-12-09 Siemens Aktiengesellschaft Chemise de protection pour une emplanture d'aube de rotor de turbine éolienne, pied de pale, pale de rotor de turbine éolienne et éolienne
US9957953B2 (en) 2014-06-05 2018-05-01 Siemens Aktiengesellschaft Root bushing for a blade root of a wind turbine rotor blade, a blade root, a wind turbine rotor blade and a wind turbine
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
US11339761B2 (en) 2016-12-29 2022-05-24 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. Bolt sleeve connector, blade and manufacturing method thereof and wind turbine generator system
EP3853444A4 (fr) * 2018-09-21 2022-06-08 TPI Composites, Inc. Système de fixation de pied de pale d'éolienne et procédé de fabrication
US11555476B2 (en) 2018-09-21 2023-01-17 Tpi Composites, Inc. Wind turbine blade root attachment system and method of manufacture

Also Published As

Publication number Publication date
EP2532880A2 (fr) 2012-12-12
DK2532880T3 (en) 2014-03-17
US20150337797A1 (en) 2015-11-26
EP2532880A3 (fr) 2013-02-13
EP2532880B1 (fr) 2014-03-05
US9410529B2 (en) 2016-08-09
CN102817792B (zh) 2017-03-01
CN102817792A (zh) 2012-12-12

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Legal Events

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AS Assignment

Owner name: SIEMENS WIND POWER A/S, DENMARK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GROVE-NIELSEN, ERIK;REEL/FRAME:028334/0577

Effective date: 20120508

AS Assignment

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