WO2003082551A1 - Blade connection for the rotor blades of a wind-energy turbine and a method for the production thereof - Google Patents

Blade connection for the rotor blades of a wind-energy turbine and a method for the production thereof Download PDF

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Publication number
WO2003082551A1
WO2003082551A1 PCT/DE2003/001023 DE0301023W WO03082551A1 WO 2003082551 A1 WO2003082551 A1 WO 2003082551A1 DE 0301023 W DE0301023 W DE 0301023W WO 03082551 A1 WO03082551 A1 WO 03082551A1
Authority
WO
WIPO (PCT)
Prior art keywords
insert
hub
blade
characterized
half
Prior art date
Application number
PCT/DE2003/001023
Other languages
German (de)
French (fr)
Inventor
Richard Schmidt
Christian Weimer
Hubert Stadtfeld
Original Assignee
Aerodyn Engineering Gmbh
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
Priority to DE10214340A priority Critical patent/DE10214340C1/en
Priority to DE10214340.4 priority
Application filed by Aerodyn Engineering Gmbh filed Critical Aerodyn Engineering Gmbh
Publication of WO2003082551A1 publication Critical patent/WO2003082551A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • F03D1/065Rotors characterised by their construction, i.e. structural design details
    • F03D1/0658Fixing wind-engaging parts to rotor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06Fibrous reinforcements only
    • B29C70/10Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/24Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least three directions forming a three dimensional structure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/42Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/443Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/86Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/08Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • Y02E10/721Blades or rotors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/52Manufacturing of products or systems for producing renewable energy
    • Y02P70/523Wind turbines

Abstract

The invention relates to a blade connection between the rotor blades and the hub of a wind-energy turbine. In said connection, the rotor blades and/or the hub are provided with at least one insert consisting of a strong material, which is introduced into the root of the rotor blade and into the flange of the hub of the rotor blade, the latter consisting of several laminate layers that have been bonded together, and which is connected to the hub and the rotor blade of the wind-energy turbine by bolts that are screwed into threaded bores in said inserts. According to the invention: the insert or inserts is/are configured with a conical cross-section; the peripheral surface of the insert or inserts is provided with a plurality of elevations and/or recesses: the laminate layers extending parallel to the insert are configured in the vicinity of the insert with a profile that complements the profile of the insert(s); and the cluster of fibres in the vicinity of the insert is sewn together perpendicular to their extension. The invention also relates to a method for producing said connection.

Description


   <Desc / Clms Page number 1>
 



   Blade connection for the rotor blades of a wind turbine and
The invention relates to a blade connection for the rotor blades of a wind power installation, in which the rotor blades or the hub are provided with at least one insert made of a solid material, which is made of several onto one another into the root of the fiber composite material the laminate layers of the manufactured rotor blade or the hub is inserted and which is connected to the hub or the rotor blade of the wind power installation via bolts screwed into threaded bores in the inserts.



  The energy generated by a wind turbine is based on the conversion of the translational air movement energy into rotary energy, which takes place via rotor blades.



  The rotor blades of the wind turbine are connected to a rotor hub at their root end, either directly or via a blade bearing arranged between the rotor blade and the rotor hub. The rotor hub and rotor blades together form the rotor.



  With this conversion of translational air kinetic energy into rotational energy, large static and dynamic bending moments arise at the connection between the rotor blade and the rotor hub, the so-called blade connection, and the associated tensile and compressive forces must be transmitted from the blade connection.



  It is already known to insert inserts into the laminate structure of the leaf root, which are made of a metal or another solid material. The problem arises that in the case of inserts glued in in this way, the forces are only transmitted via the gluing surface, and the surface of the inserts must therefore be large.



  The invention has for its object to provide a blade connection that allows transmission of high tensile and compressive forces.



  According to the invention, this object is achieved in that the at least one insert is conical in cross section, the peripheral surface of the at least one insert with a

 <Desc / Clms Page number 2>

 A plurality of elevations and / or recesses is provided, the laminate layers extending parallel to the insert are formed in the area of the insert with a profile complementary to the profile of the at least one insert and the laminate layers are sewn together in the area of the insert perpendicular to their extension.



  The insert can be designed in the form of a full ring, but it is also possible to provide two half-ring-shaped inserts or a plurality of ring segment-shaped inserts in the form of a ring part with radial side walls.The method according to the invention for producing the blade connection of a wind energy installation according to one of the preceding claims is characterized by sewing the still impregnated, superimposed fiber fabrics in the area of the at least one insert perpendicular to their extension, inserting the at least one insert into the space left free by the sewn fiber fabrics and infusing or injecting a resin into the fiber fabric to form the laminate layers.



  The invention is explained below with reference to a drawing. It shows:
Fig. 1 shows an insert in cross section, this on one side the (not shown on the other side) structure of the sewn
Reproduces laminate layers,
Fig. 2 shows a first detailed view from Fig. 1 and
3 shows a second detailed illustration from FIG. 1.



  The - preferably metallic - insert 1 is conical in its basic structure. Its peripheral surface is provided with a plurality of elevations and recesses 2. The insert 1 is in an F; Isoplastic composite laminated structure 3 embedded. This laminate structure is provided with different seams in the area of the insert 1, namely with an assembly and positioning seam 4, which allows improved force guidance into the laminate structure 3. An ILS seam increases the interlaminar shear strength of the laminate layers. A final assembly seam 6 serves to protect against

 <Desc / Clms Page number 3>

 Delaminations of the fiber plastic composite in the area of the internal thread 7, which is inserted in the center of the insert 1.



  An additionally introduced fiber reinforcement material 8 forms the positive connection with the elevations and recesses 2 in the laminate structure.



  The insert 1 can be designed as a full ring with an inwardly tapering cross-section, but it is also possible to make it semi-ring-shaped or to provide a plurality of ring segment-shaped inserts.



  It is possible, without the invention being restricted to this, to first produce an as yet impregnated preform with suitable stitching of the fiber fabrics, to insert the insert and then to infuse or inject the resin, thereby producing the positive fit between the laminate layers and the profile of the insert becomes.



  However, it is also possible, in a manner known per se, to produce the halves of the rotor blade in a half-shell, to design the laminate layers of the blade root with a profile that complements this in the area of the insert, then to insert the half-ring-shaped insert and then to connect the two halves of the rotor blade to one another to lay.



  A third possibility is to provide a large number of individual inserts which are inserted into the preformed profile of the preform of the rotor blade or the hub and then produce the positive connection by injecting or infusing the resin.



  The conical design of the inserts on the one hand makes it easier to insert them into the non-impregnated but already sewn fiber fabrics, and on the other hand it prevents force jumps between the insert and the laminate.

Claims

 Claims 1. Blade connection between the rotor blades and the hub of a wind turbine, in which the rotor blades and / or the hub are provided with at least one insert made of a solid material which is in the root of the rotor blade or in the flanges of the hub of the rotor blade made of a fiber composite material and consisting of several superimposed laminate layers or
 The hub is inserted and is connected to the hub or the rotor blade of the wind energy installation via bolts screwed into threaded bores in the inserts, characterized in that - the at least one insert is conical in cross section, - the peripheral surface of the at least one insert with a plurality is provided with elevations and / or recesses, - the laminate layers extending parallel to the insert in the region of the insert are designed with a profile complementary to the profile of the at least one insert, and - the laminate layers in the region of the insert are sewn together perpendicular to their extension ,
2. Blade connector according to claim 1, characterized in that a fully ring-shaped insert is provided.
3. Blade connection according to claim 1, characterized in that two half-ring-shaped inserts are provided.
4. Blade connection according to claim 1, characterized in that a plurality of ring-segment-shaped inserts are provided.  <Desc / Clms Page number 5>  
5. A method for producing the blade connection of a wind energy installation according to one of the preceding claims, characterized by - sewing the still impregnated, laid-up fiber layers in the area of the at least one insert perpendicular to their extension, - inserting the at least one insert into the stitched through the Fiber fabrics leave space and - infuse or inject a resin into the fiber fabrics to form the laminate layers.
6. A method for producing a blade connection according to claim 3, characterized by - inserting the half-ring-shaped insert into one half of the rotor blade shaped in a half shell and - placing the second half of the rotor blade shaped in a second half shell onto the first half, including the insert.
7. A method for producing the blade connection of a wind energy plant according to one of the preceding claims, characterized by - sewing the pre-impregnated, superimposed fiber fabrics (pre-pregs) in the area of the at least one insert perpendicular to their extension, - inserting the at least one insert into the the sewn pre-pregs leave space and - activate the pre-preg to form the laminate layers.
PCT/DE2003/001023 2002-03-28 2003-03-27 Blade connection for the rotor blades of a wind-energy turbine and a method for the production thereof WO2003082551A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10214340A DE10214340C1 (en) 2002-03-28 2002-03-28 Blade connection for the rotor blades of a wind turbine and method for its production
DE10214340.4 2002-03-28

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20320626U DE20320626U1 (en) 2002-03-28 2003-03-27 Blade connection for the rotor blades of a wind energy plant
AU2003229497A AU2003229497A1 (en) 2002-03-28 2003-03-27 Blade connection for the rotor blades of a wind-energy turbine and a method for the production thereof

Publications (1)

Publication Number Publication Date
WO2003082551A1 true WO2003082551A1 (en) 2003-10-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/001023 WO2003082551A1 (en) 2002-03-28 2003-03-27 Blade connection for the rotor blades of a wind-energy turbine and a method for the production thereof

Country Status (3)

Country Link
AU (1) AU2003229497A1 (en)
DE (2) DE10214340C1 (en)
WO (1) WO2003082551A1 (en)

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FR2863318A1 (en) * 2003-12-09 2005-06-10 Ocea Sa Wind generator for power plant, has offset unit offsetting leading edge such that main axis extended between center of root base of blades and opposite ends of blades does not pass through rotational axis of hub
FR2863321A1 (en) * 2003-12-09 2005-06-10 Ocea Sa Wind generator`s blade for producing electricity, has at one of its ends cylindrical root to be fixed with hub of wind generator by screwing units cooperating with threaded bores carried by root
WO2006070171A1 (en) * 2004-12-29 2006-07-06 Vestas Wind Systems A/S Method of manufacturing a wind turbine blade shell member with a fastening member and a wind turbine blade with a fastening member
EP2078851A1 (en) 2008-01-14 2009-07-15 Lm Glasfiber A/S Wind turbine blade and hub assembly
GB2465167A (en) * 2008-11-07 2010-05-12 Vestas Wind Sys As A turbine blade having mounting inserts of different lengths
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US8133029B2 (en) 2006-05-11 2012-03-13 Repower Systems Ag Rotor blade attachment
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CN103552256A (en) * 2013-10-25 2014-02-05 中航复合材料有限责任公司 Autoclave integrated-forming method for composite double-surface-ribbed wallboard
DE102012111219A1 (en) 2012-11-21 2014-05-22 Spitzner Engineers GmbH wind turbine component
WO2015130162A1 (en) 2014-02-25 2015-09-03 Viventus Holding B.V. Bushing intended for connecting a blade root of a wind turbine blade directly or indirectly to a hub of a turbine
US9464622B2 (en) 2013-05-31 2016-10-11 General Electric Company Rotor blade assembly having a stiffening root insert
US9745956B2 (en) 2014-12-10 2017-08-29 General Electric Company Spar cap for a wind turbine rotor blade
RU2641927C2 (en) * 2012-12-05 2018-01-23 Снекма Method for production of turbomachnine blade tang made of composite and blade root made by method
US9897065B2 (en) 2015-06-29 2018-02-20 General Electric Company Modular wind turbine rotor blades and methods of assembling same
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
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US10422316B2 (en) 2016-08-30 2019-09-24 General Electric Company Pre-cured rotor blade components having areas of variable stiffness

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Cited By (34)

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Publication number Priority date Publication date Assignee Title
FR2863321A1 (en) * 2003-12-09 2005-06-10 Ocea Sa Wind generator`s blade for producing electricity, has at one of its ends cylindrical root to be fixed with hub of wind generator by screwing units cooperating with threaded bores carried by root
FR2863318A1 (en) * 2003-12-09 2005-06-10 Ocea Sa Wind generator for power plant, has offset unit offsetting leading edge such that main axis extended between center of root base of blades and opposite ends of blades does not pass through rotational axis of hub
US8172538B2 (en) 2004-12-29 2012-05-08 Vestas Wind Systems A/S Method of manufacturing a wind turbine blade shell member with a fastening member and a wind turbine blade with a fastening member
WO2006070171A1 (en) * 2004-12-29 2006-07-06 Vestas Wind Systems A/S Method of manufacturing a wind turbine blade shell member with a fastening member and a wind turbine blade with a fastening member
AU2004326123B2 (en) * 2004-12-29 2009-04-23 Vestas Wind Systems A/S Method of manufacturing a wind turbine blade shell member with a fastening member and a wind turbine blade with a fastening member
US8133029B2 (en) 2006-05-11 2012-03-13 Repower Systems Ag Rotor blade attachment
US8408875B2 (en) 2006-05-11 2013-04-02 Repower Systems Se Rotor blade attachment
WO2009089833A2 (en) 2008-01-14 2009-07-23 Lm Glasfiber A/S Wind turbine blade and hub assembly
EP2078851A1 (en) 2008-01-14 2009-07-15 Lm Glasfiber A/S Wind turbine blade and hub assembly
WO2010052487A2 (en) * 2008-11-07 2010-05-14 Vestas Wind Systems A/C Wind turbine rotor blade
WO2010052487A3 (en) * 2008-11-07 2010-10-21 Vestas Wind Systems A/C Wind turbine rotor blade
US8105040B2 (en) 2008-11-07 2012-01-31 Vestas Wind Systems A/S Wind turbine rotor blade
GB2465167A (en) * 2008-11-07 2010-05-12 Vestas Wind Sys As A turbine blade having mounting inserts of different lengths
US8066490B2 (en) 2009-12-21 2011-11-29 General Electric Company Wind turbine rotor blade
US20130285284A1 (en) * 2011-01-21 2013-10-31 Hexcel Corporation Module for holding at least one bushing
US9370905B2 (en) * 2011-01-21 2016-06-21 Hexcel Holding Gmbh Module for holding at least one bushing
DE102012111219A1 (en) 2012-11-21 2014-05-22 Spitzner Engineers GmbH wind turbine component
DE102012111219B4 (en) * 2012-11-21 2016-06-16 Spitzner Engineers GmbH Wind turbine component
EP2735732A2 (en) 2012-11-21 2014-05-28 Spitzner Engineers GmbH Wind energy plant component
RU2641927C2 (en) * 2012-12-05 2018-01-23 Снекма Method for production of turbomachnine blade tang made of composite and blade root made by method
US9464622B2 (en) 2013-05-31 2016-10-11 General Electric Company Rotor blade assembly having a stiffening root insert
CN103552256A (en) * 2013-10-25 2014-02-05 中航复合材料有限责任公司 Autoclave integrated-forming method for composite double-surface-ribbed wallboard
WO2015130162A1 (en) 2014-02-25 2015-09-03 Viventus Holding B.V. Bushing intended for connecting a blade root of a wind turbine blade directly or indirectly to a hub of a turbine
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
US9745956B2 (en) 2014-12-10 2017-08-29 General Electric Company Spar cap for a wind turbine rotor blade
US9897065B2 (en) 2015-06-29 2018-02-20 General Electric Company Modular wind turbine rotor blades and methods of assembling same
US10337490B2 (en) 2015-06-29 2019-07-02 General Electric Company Structural component for a modular rotor blade
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