US20110318186A1 - Root-End of a Wind Turbine Blade - Google Patents

Root-End of a Wind Turbine Blade Download PDF

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Publication number
US20110318186A1
US20110318186A1 US13/114,530 US201113114530A US2011318186A1 US 20110318186 A1 US20110318186 A1 US 20110318186A1 US 201113114530 A US201113114530 A US 201113114530A US 2011318186 A1 US2011318186 A1 US 2011318186A1
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Prior art keywords
root
segments
blade
segment
end according
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US13/114,530
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Jens Jørgen Østergaard Kristensen
Michael Noerlem
Henrik Stiesdal
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Siemens AG
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Siemens AG
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Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRISTENSEN, JENS JOERGEN OESTERGAARD, NOERLEM, MICHAEL, STIESDAL, HENRIK
Publication of US20110318186A1 publication Critical patent/US20110318186A1/en
Abandoned legal-status Critical Current

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    • 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
    • F05B2230/00—Manufacture
    • F05B2230/50—Building or constructing in particular ways
    • 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 invention relates to a root-end of a blade of a wind turbine and to a wind-turbine blade, which contains this root end.
  • a preferred method to manufacture a blade of a wind turbine is disclosed by document EP 1 310 351 A1.
  • the blade is manufactured by help of a closed-mould system.
  • the blade is built up like a sandwich as described below.
  • a first mould is used to support a number of stacked layers.
  • the layers are put on top of the first mould and on top of each other to build up the three-dimensional shape of the blade.
  • a cavity within the blade may be prepared by the usage of a balloon, which is filled with air for example.
  • the balloon is embraced by the layers and thus contributes to the three-dimensional shape of the blade.
  • a second mould is connected with the first mould, thus a closed-mould-system is achieved.
  • the closed-mould system embraces the whole blade-structure.
  • Air is evacuated out of the closed-mould-system, while resin is injected into the closed-mould-system. The resin cures out and the blade is nearly completed.
  • the balloons used may be removed out from the blade, thus a corresponding cavity remains inside the blade.
  • This blade-production procedure is also known as “Vacuum Assisted Resin Transfer Moulding, VARTM”-process.
  • wrinkles may occur between and within the blade components. They may occur typically if fiber-mats are arranged on top of each other or if fiber mats are located adjacent to rigid blade-components.
  • root-end section of a blade which is connected with the hub of the wind turbine directly or via components of a pitch-system, needs to be very strong to cope with all forces acting on the blade.
  • the root-end also has to be designed as a rigid interface of the blade to the hub.
  • the root-end of the blade needs to be thick and massive, thus a lot of layers and composite material needs to be arranged there.
  • the root-end of the blade is typically circular-shaped with a diameter of one meter up to five meters.
  • the thick and massive structure of the root-end will contain a huge and large concentration of resin. Thus the root-end will become very hot while the resin cures out. This may result to a weak structure in this critical blade-area.
  • a root-end of the blade is provided, while the root-end contains at least two segments.
  • the segments are preferably produced separately and are connected later, when the blade is manufactured.
  • the segments are designed, arranged and connected in a way that they are shaped as an appropriate root-end portion.
  • This root-end portion is able to cope with all forces, which might act on a blade, which contains the segmented root-end.
  • the root-end segment is a pre-casted component preferably. It is preferably manufactured by a VARTM-process, which uses a closed-mould system.
  • each root-end segment is shaped like an arc of a circle.
  • the root-end is divided into six segments.
  • Adjacent segments are preferably fixed to each other to build up the completed root-end.
  • the fixation may contain a screw coupling or a dowel connection or the like.
  • a number of holes, which are allocated to surfaces of the adjacent segments, may be used for the connection used.
  • each single root-end segment show a number of integrated resin channels. These channels are used to distribute a dedicated amount of resin to connect the root-end segment with the other blade components used. Thus a smaller amount of resin is needed and placed within the root-end in view to the prior art described above.
  • each root-end segment contains a first segment section, which is designed and developed for a connection with the other blade components used.
  • this first segment is formed like a wedge.
  • blade components like fiber mats
  • each root-end segment contains a second segment section, which is designed and developed for a connection of the completed root-end with the hub or for a connection of the completed root-end with pitch-components being located asides the hub.
  • the segments of the root-end are positioned on a mould as described in the introduction of this application.
  • Fiber reinforced material is placed around the root-end segments during the lay-up work, thus the root-end segments are an integrated part of the blade, which needs to be manufactured.
  • segments of the root-end become a fully integrated part of the blade, especially when the well-known VARTM-process is applied to the closed-mould system to finish the blade.
  • the invention allows to lay-up two half-parts of a blade separately and in parallel.
  • Each half-part comprises at least one pre-casted root-end segment.
  • the two half-parts of the blade are built-up in parallel, resulting in a reduced amount of working-time needed.
  • FIG. 1 shows a preferred root-end segment according to the invention
  • FIG. 2 shows a first mould-configuration to produce a root-end segment invented
  • FIG. 3 shows a second mould-configuration to produce another root-end segment invented.
  • FIG. 1 shows a preferred root-end segment S according to the invention.
  • This segment S is shaped and prepared to build up a circular shaped root-end segment with five other segments.
  • the segment S shows a number of resin channels RC.
  • the resin channels RC allow the defined distribution of resin within the segment S and along its surface.
  • These resin channels RC are used to distribute a dedicated amount of resin to connect the root-end segment S with other blade components used. Thus a smaller amount of resin is needed and placed within the root-end in view to the prior art described above.
  • the resin channels enable an easy control of the resin-infusion when the blade is manufactured by help of a VARTM-process for example.
  • the blade is manufactured by a VARTM-process thus the segment S is placed together with fiber mats and other blade components onto a mould (not shown here).
  • the fiber mats are placed to overlap at least a part of the segment S, thus the fiber mats are used connect the segment S with other blade components.
  • the segment S shows a first segment section SSB, which is designed and developed for a connection of the segment S with the other blade components—like the fiber mats used.
  • this first segment section SSB is formed like a wedge.
  • a smooth connection or transition of the fiber mats with the root-end segment S is achieved. Wrinkles are avoided within the blade-structure due to this smooth transition.
  • This wedge-shape provides a gradually transition zone from the root-end portion to the rest of the blade structure.
  • segment S contains a second segment section SSH.
  • This section SSH is designed and developed for a connection of the completed blade via its root-end with a wind-turbine hub or for a connection of the completed blade via its root-end with pitch-components, which are located asides the hub for example.
  • This interface SSH to the hub comprises a number of circumferential connection holes, which are prepared for a connection with the flange of the hub for example or with the flange of a dedicated pitch-component.
  • a number of holes H are prepared within a surface of the segment S.
  • the holes are part of a bolted connection or of a dowel connection or the like.
  • the segment S shown in FIG. 1 covers a 60° segment of a circle of a completed root-end-portion, thus six segments S are needed to build up the whole root-end.
  • FIG. 2 shows a first mould-configuration MS 180 to produce a root-end segment as invented.
  • the mould-configuration MS 180 is designed and used to produce or manufacture a root-end segment as a pre-casted component.
  • This pre-casted component will cover a 180° segment of a circle of a completed root-end-portion, thus two segments are needed to build up a completed root-end.
  • the mould-configuration MS 180 is preferably used within a VARTM-process to manufacture the segment. Thus a number of fiber mates FML is put as layers on top of the mould-configuration MS 180 . Thus the mould-configuration MS 180 is used as lower first mould, which supports all needed, segment components (as fiber mats for example).
  • FIG. 3 shows a second mould-configuration MS 60 to produce another root-end segment invented.
  • the mould-configuration MS 60 is designed and used to produce or manufacture a root-end segment as a pre-casted component.
  • This pre-casted component will cover a 60° segment of a circle of a completed root-end-portion, thus six segments are needed to build up a completed root-end.
  • the mould-configuration MS 60 is preferably used within a VARTM-process to manufacture the segment. Thus a number of fiber mates FML is put as layers on top of the mould-configuration MS 60 . Thus the mould-configuration MS 60 is used as lower first mould, which supports all needed segment components (as fiber mats for example).
  • the lay-out-work in the mould MS 60 is less tedious than in the MS 180 .
  • a one-piece root-end may be produced like this: a fiber is spun around a cylinder or around another shaped surface. The root-end portion is casted to get a stable root-end-portion. The root end is cut now into a number of root-end segments (for example into a number of two, four or six segments). Thus production time is reduced considerably, while wrinkles are eliminated by this method.

Abstract

The root-end of a blade of a wind turbine contains at least two segments. The segments contain a connection mechanism for their connection to build up the root-end. The segments contain a first segment section, which is prepared for a connection with fiber reinforced components of the blade. The segments contain a second segment section, which is prepared for a connection with a hub of a wind turbine or which is prepared for a connection with pitch-components of a wind turbine.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • This application claims priority of European Patent Office application No. 10167326.7 EP filed Jun. 25, 2010, which is incorporated by reference herein in its entirety.
    • FIELD OF INVENTION
  • The invention relates to a root-end of a blade of a wind turbine and to a wind-turbine blade, which contains this root end.
    • BACKGROUND OF INVENTION
  • There are a number of different methods, which are used to manufacture blades of a wind turbine.
  • It is known to wind roving tapes or roving bundles around a core or mandrel to build up a blade of a wind turbine.
  • It is also known to produce a blade by two pre-produced half-shells, which are connected. The half-shells are bonded (glued) together along their respective leading and trailing edges. The half-shells are shaped in a way that a common cavity is built up by them within the manufactured blade. This cavity inside may be used to support a beam or the like. The beam may be U-shaped or I-shaped and is used to connect the half-shells by dedicated contact surfaces. This blade-production-method results in a heavy blade due to the needed glue.
  • A preferred method to manufacture a blade of a wind turbine is disclosed by document EP 1 310 351 A1. The blade is manufactured by help of a closed-mould system. The blade is built up like a sandwich as described below.
  • A first mould is used to support a number of stacked layers. The layers are put on top of the first mould and on top of each other to build up the three-dimensional shape of the blade.
  • A cavity within the blade may be prepared by the usage of a balloon, which is filled with air for example. The balloon is embraced by the layers and thus contributes to the three-dimensional shape of the blade.
  • It is even possible to locate pre-fabricated components within the blade structure, for example along the leading and/or the trailing edge for reinforcement-purposes.
  • A second mould is connected with the first mould, thus a closed-mould-system is achieved. The closed-mould system embraces the whole blade-structure.
  • Air is evacuated out of the closed-mould-system, while resin is injected into the closed-mould-system. The resin cures out and the blade is nearly completed.
  • Now the balloons used may be removed out from the blade, thus a corresponding cavity remains inside the blade.
  • This blade-production procedure is also known as “Vacuum Assisted Resin Transfer Moulding, VARTM”-process.
  • Due to the stacked layers wrinkles may occur between and within the blade components. They may occur typically if fiber-mats are arranged on top of each other or if fiber mats are located adjacent to rigid blade-components.
  • Document EP 1 109 657 A1 describes a method to produce closed composite structures. Fiber reinforced material is placed around a molding core and within a mould-system. The molding core is filled with a material for its shaping. After a curing process the filling material is removed out of the core and the whole molding core is even removed out from a mould-system.
  • It is known that the root-end section of a blade, which is connected with the hub of the wind turbine directly or via components of a pitch-system, needs to be very strong to cope with all forces acting on the blade. The root-end also has to be designed as a rigid interface of the blade to the hub.
  • The root-end of the blade needs to be thick and massive, thus a lot of layers and composite material needs to be arranged there.
  • The root-end of the blade is typically circular-shaped with a diameter of one meter up to five meters.
  • Due to this dimensions it is very difficult to manufacture the root-end with a uniform thickness and without wrinkles.
  • Additionally it is very difficult to control and handle the casting process of the root-end. Due to its thickness and due to the used huge number of layers there the infusion and the distribution of resin within the root-end are very difficult.
  • The thick and massive structure of the root-end will contain a huge and large concentration of resin. Thus the root-end will become very hot while the resin cures out. This may result to a weak structure in this critical blade-area.
    • SUMMARY OF INVENTION
  • It is therefore the aim of the invention to provide an improved root-end of the blade and to provide an improved blade in view to the problems, which are addressed above.
  • This aim is achieved by the features the independent claims.
  • Preferred embodiments of the invention are object of the dependent claims.
  • According to the invention a root-end of the blade is provided, while the root-end contains at least two segments.
  • The segments are preferably produced separately and are connected later, when the blade is manufactured.
  • The segments are designed, arranged and connected in a way that they are shaped as an appropriate root-end portion. This root-end portion is able to cope with all forces, which might act on a blade, which contains the segmented root-end.
  • The root-end segment is a pre-casted component preferably. It is preferably manufactured by a VARTM-process, which uses a closed-mould system.
  • Preferably the completed root-end shows a circular-shaped diameter, thus each root-end segment is shaped like an arc of a circle.
  • Preferably the root-end is divided into six segments.
  • Adjacent segments are preferably fixed to each other to build up the completed root-end.
  • The fixation may contain a screw coupling or a dowel connection or the like. A number of holes, which are allocated to surfaces of the adjacent segments, may be used for the connection used.
  • Preferably each single root-end segment show a number of integrated resin channels. These channels are used to distribute a dedicated amount of resin to connect the root-end segment with the other blade components used. Thus a smaller amount of resin is needed and placed within the root-end in view to the prior art described above.
  • Preferably each root-end segment contains a first segment section, which is designed and developed for a connection with the other blade components used.
  • Preferably this first segment is formed like a wedge. Thus a smooth connection or transition of blade components (like fiber mats) with the root-end segment is achieved while wrinkles are avoided within the blade-structure.
  • Preferably each root-end segment contains a second segment section, which is designed and developed for a connection of the completed root-end with the hub or for a connection of the completed root-end with pitch-components being located asides the hub.
  • Preferably the segments of the root-end are positioned on a mould as described in the introduction of this application.
  • Fiber reinforced material is placed around the root-end segments during the lay-up work, thus the root-end segments are an integrated part of the blade, which needs to be manufactured.
  • Thus the segments of the root-end become a fully integrated part of the blade, especially when the well-known VARTM-process is applied to the closed-mould system to finish the blade.
  • Due to the invention it is very easy to align and to orientate the segments within the blade-production process used.
  • If a VARTM-process is used tolerances of the closed mould system might be adjusted and balanced very easily.
  • The invention allows to lay-up two half-parts of a blade separately and in parallel. Each half-part comprises at least one pre-casted root-end segment. Thus the two half-parts of the blade are built-up in parallel, resulting in a reduced amount of working-time needed.
  • These two half-parts might be brought together and onto a first mould as described above, while fixation means and/or transportation means may be used for the positioning of the two half-parts of the blade. A second mould is used to get the closed-mould-system, which embraces or incorporates the whole blade. Finally the VARTM-process may be applied to the connected half-parts of the blade to finalize it in the well known “single shot” casting process.
  • It is also possible to manufacture two half parts of the blades by the VARTM-process, using at least one pre-casted root-end segment in each of the half parts. Finally the two half-parts of the blade might be connected by help of glue or the like. Thus the production process is accelerated in view to the prior art.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention is shown in more detail by the help of the attached figures.
  • The figures show preferred configurations only and thus do not limit the scope of the invention.
  • FIG. 1 shows a preferred root-end segment according to the invention,
  • FIG. 2 shows a first mould-configuration to produce a root-end segment invented, and
  • FIG. 3 shows a second mould-configuration to produce another root-end segment invented.
    •  DETAILED DESCRIPTION OF INVENTION
  • FIG. 1 shows a preferred root-end segment S according to the invention.
  • This segment S is shaped and prepared to build up a circular shaped root-end segment with five other segments.
  • If all six root-end segments S are connected the circular root-end is finalized.
  • The segment S shows a number of resin channels RC. The resin channels RC allow the defined distribution of resin within the segment S and along its surface.
  • These resin channels RC are used to distribute a dedicated amount of resin to connect the root-end segment S with other blade components used. Thus a smaller amount of resin is needed and placed within the root-end in view to the prior art described above.
  • The resin channels enable an easy control of the resin-infusion when the blade is manufactured by help of a VARTM-process for example.
  • Due to the reduced amount of resin needed the curing temperature is even asides the root-end, while the blade is manufactured.
  • Preferably the blade is manufactured by a VARTM-process thus the segment S is placed together with fiber mats and other blade components onto a mould (not shown here). The fiber mats are placed to overlap at least a part of the segment S, thus the fiber mats are used connect the segment S with other blade components.
  • The segment S shows a first segment section SSB, which is designed and developed for a connection of the segment S with the other blade components—like the fiber mats used.
  • Preferably this first segment section SSB is formed like a wedge. Thus a smooth connection or transition of the fiber mats with the root-end segment S is achieved. Wrinkles are avoided within the blade-structure due to this smooth transition.
  • This wedge-shape provides a gradually transition zone from the root-end portion to the rest of the blade structure.
  • Preferably the segment S contains a second segment section SSH. This section SSH is designed and developed for a connection of the completed blade via its root-end with a wind-turbine hub or for a connection of the completed blade via its root-end with pitch-components, which are located asides the hub for example.
  • This interface SSH to the hub comprises a number of circumferential connection holes, which are prepared for a connection with the flange of the hub for example or with the flange of a dedicated pitch-component.
  • For the fixation of the segment S with other adjacent segments a number of holes H are prepared within a surface of the segment S. The holes are part of a bolted connection or of a dowel connection or the like.
  • The segment S shown in FIG. 1 covers a 60° segment of a circle of a completed root-end-portion, thus six segments S are needed to build up the whole root-end.
  • FIG. 2 shows a first mould-configuration MS180 to produce a root-end segment as invented.
  • The mould-configuration MS180 is designed and used to produce or manufacture a root-end segment as a pre-casted component.
  • This pre-casted component will cover a 180° segment of a circle of a completed root-end-portion, thus two segments are needed to build up a completed root-end.
  • The mould-configuration MS180 is preferably used within a VARTM-process to manufacture the segment. Thus a number of fiber mates FML is put as layers on top of the mould-configuration MS180. Thus the mould-configuration MS180 is used as lower first mould, which supports all needed, segment components (as fiber mats for example).
  • Another appropriate mould is used later to achieve the closed-mould system for the VARTM-process as described in the introduction of this application.
  • FIG. 3 shows a second mould-configuration MS60 to produce another root-end segment invented.
  • The mould-configuration MS60 is designed and used to produce or manufacture a root-end segment as a pre-casted component.
  • This pre-casted component will cover a 60° segment of a circle of a completed root-end-portion, thus six segments are needed to build up a completed root-end.
  • The mould-configuration MS60 is preferably used within a VARTM-process to manufacture the segment. Thus a number of fiber mates FML is put as layers on top of the mould-configuration MS60. Thus the mould-configuration MS60 is used as lower first mould, which supports all needed segment components (as fiber mats for example).
  • Another appropriate mould is used later to achieve the closed-mould system for the VARTM-process as described in the introduction of this application.
  • It is very easy to lay up the fiber mats FML in this mould MS60 compared with the mould MS180.
  • The lay-out-work in the mould MS60 is less tedious than in the MS180.
  • Within the MS180 it is more difficult to obtain a uniform thickness and to avoid wrinkles, as the fiber mats FML tend to hang like curtains. They might not follow exactly the shape of the inner-mould MS180, thus pockets and resin rich areas in the casted component may be the result.
  • Thus the quality of the segments, which are manufactured by help of the mould MS60, is improved in view to the segments, which are manufactured by help of the mould MS180.
  • It has to be noted that there is at least one another way to manufacture segments for the root-end-portion of the blade (not shown here).
  • For example a one-piece root-end may be produced like this: a fiber is spun around a cylinder or around another shaped surface. The root-end portion is casted to get a stable root-end-portion. The root end is cut now into a number of root-end segments (for example into a number of two, four or six segments). Thus production time is reduced considerably, while wrinkles are eliminated by this method.

Claims (15)

1.-11. (canceled)
12. A root-end of a blade of a wind-turbine, comprising:
a plurality of segments,
each of the plurality of segments comprise
a connection mechanism to connect to an adjacent segment of the plurality of segments in order to form the root-end,
a first segment section, which is prepared for a connection with fiber reinforced components of the blade,
a second segment section, which is prepared for a connection with a hub of a wind turbine or which is prepared for a connection with pitch-components of a wind turbine.
13. The root-end according to claim 12, wherein each of the plurality of segments is a pre-casted component.
14. The root-end according to claim 12, wherein the connected segments of segments root-end form a circular-shaped diameter.
15. The root-end according to claim 12, wherein the root-end comprises six segments.
16. The root-end according to claim 12, wherein the root-end comprises four segments.
17. The root-end according to claim 12, wherein the root-end comprises two segments.
18. The root-end according to claim 12, wherein the adjacent segments are connected by a screw connection.
19. The root-end according to claim 12, wherein the adjacent segments are connected by a dowel connection.
20. The root-end according to claim 12, wherein each of the plurality of segments includes a hole used for the connection of the adjacent segments.
21. The root-end according to claim 12, wherein each of the plurality of segments contain a plurality of resin channels as an integral part.
22. The root-end according to claim 12, wherein the first segment section is shaped like a wedge to achieve a smooth transition zone between the fiber reinforced components of the blade and the segment.
23. The root-end according to claim 12, wherein the plurality of segments of the root-end are positioned on a mould, which is used to support the segments and other blade components for an applied VARTM-process to manufacture a wind turbine blade.
24. Root-end according to claim 23, wherein a fiber reinforced material is arranged and/or placed around the plurality of segments, thereby making the plurality of segments an integral part of the blade.
25. A blade of a wind-turbine, comprising:
a segmented root-end according claim 12.
US13/114,530 2010-06-25 2011-05-24 Root-End of a Wind Turbine Blade Abandoned US20110318186A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10167326A EP2400147A1 (en) 2010-06-25 2010-06-25 Root of the blade of a wind turbine
EP10167326.7EP 2010-06-25

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US20110318186A1 true US20110318186A1 (en) 2011-12-29

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EP (1) EP2400147A1 (en)
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US20120007269A1 (en) * 2010-07-09 2012-01-12 Lm Glasfiber A/S Method of manufacturing pre-bent wind turbine blades
US20140234109A1 (en) * 2011-10-25 2014-08-21 Blade Dynamics Limited Method of making a root end joint of a wind turbine blade and a root segment for such a joint
US9897065B2 (en) 2015-06-29 2018-02-20 General Electric Company Modular wind turbine rotor blades and methods of assembling same
US9970412B2 (en) 2012-09-26 2018-05-15 Blade Dynamics Limited Wind turbine blade
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
US10179425B2 (en) * 2013-04-08 2019-01-15 Vestas Wind Systems A/S Fibre preform for laying on a curved surface of a mould
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
US10704531B2 (en) 2014-03-20 2020-07-07 Wobben Properties Gmbh Wind turbine rotor blade with a rotor blade connection and method for producing same
US20210148329A1 (en) * 2019-11-14 2021-05-20 Siemens Gamesa Renewable Energy A/S Method for manufacturing root segment sections for a root segment of a turbine blade, method for manufacturing the root segment and method for manufacturing the turbine blade
US11092132B2 (en) * 2013-07-12 2021-08-17 Lm Wp Patent Holding A/S Method of manufacturing a wind turbine blade

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK2532880T3 (en) 2011-06-10 2014-03-17 Siemens Ag A rotor blade for a wind turbine
GB201215004D0 (en) 2012-08-23 2012-10-10 Blade Dynamics Ltd Wind turbine tower
GB201217210D0 (en) 2012-09-26 2012-11-07 Blade Dynamics Ltd A metod of forming a structural connection between a spar cap fairing for a wind turbine blade
WO2016156184A1 (en) * 2015-03-31 2016-10-06 Siemens Aktiengesellschaft A fiber lay-up, a blade root for a wind turbine rotor blade, a wind turbine rotor blade and a method for producing a wind turbine rotor blade
CN113043624B (en) * 2021-04-29 2023-05-30 中复连众（哈密）复合材料有限公司 Method for solving root wrinkles of embedded bolt blades of megawatt wind driven generator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2182812A (en) * 1938-02-10 1939-12-12 Lougheed Victor Air propeller blade
US2347282A (en) * 1942-01-08 1944-04-25 Horace H Roby Propeller hub assembly
US7163378B2 (en) * 2002-01-11 2007-01-16 Lm Glasfiber A/S Embedding element to be embedded in the end part of a windmill blade, a method producing such an embedding element as well as embedding of such embedding elements in a windmill blade
US20070290118A1 (en) * 2004-11-24 2007-12-20 Henrik Stiesdal Method And Connecting Piece For Assembling An Arm, Preferably A Windmill Arm, In Sections
US20080206062A1 (en) * 2007-02-28 2008-08-28 Gamesa Innovation & Technology, Sl. Wind turbine multi-panel blade
WO2009003476A1 (en) * 2007-06-29 2009-01-08 Lm Glasfiber A/S Method of using a formable core block for a resin impregnation process
US8186960B2 (en) * 2008-04-15 2012-05-29 Frontier Pro Services, Llc Repair of rotor blade roots

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000001520A1 (en) 1998-07-03 2000-01-13 Bonus Energy A/S Method for producing closed composite structures and moulding apparatus to be used by the method
EP3219981B1 (en) * 2001-07-19 2021-09-01 Vestas Wind Systems A/S Wind turbine blade
DK176335B1 (en) 2001-11-13 2007-08-20 Siemens Wind Power As Process for manufacturing wind turbine blades
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
US7517198B2 (en) * 2006-03-20 2009-04-14 Modular Wind Energy, Inc. Lightweight composite truss wind turbine blade
ES2364258B1 (en) * 2008-03-05 2012-06-01 Manuel Torres Martinez AEROGENERATOR BLADES SECTION UNION SYSTEM
US20090273111A1 (en) * 2008-04-30 2009-11-05 Bha Group, Inc. Method of making a wind turbine rotor blade
ES2341074B1 (en) * 2008-10-28 2011-05-20 GAMESA INNOVATION & TECHNOLOGY, S.L A MULTI-PANEL AEROGENERATOR SHOVEL WITH INTEGRATED ROOT.
US7891947B2 (en) * 2008-12-12 2011-02-22 General Electric Company Turbine blade and method of fabricating the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2182812A (en) * 1938-02-10 1939-12-12 Lougheed Victor Air propeller blade
US2347282A (en) * 1942-01-08 1944-04-25 Horace H Roby Propeller hub assembly
US7163378B2 (en) * 2002-01-11 2007-01-16 Lm Glasfiber A/S Embedding element to be embedded in the end part of a windmill blade, a method producing such an embedding element as well as embedding of such embedding elements in a windmill blade
US20070290118A1 (en) * 2004-11-24 2007-12-20 Henrik Stiesdal Method And Connecting Piece For Assembling An Arm, Preferably A Windmill Arm, In Sections
US20080206062A1 (en) * 2007-02-28 2008-08-28 Gamesa Innovation & Technology, Sl. Wind turbine multi-panel blade
WO2009003476A1 (en) * 2007-06-29 2009-01-08 Lm Glasfiber A/S Method of using a formable core block for a resin impregnation process
US8186960B2 (en) * 2008-04-15 2012-05-29 Frontier Pro Services, Llc Repair of rotor blade roots

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Mechanical Design of Machine Elements and Machines" by Jack A. Collins et al., second edition published by John Wiley and Sons, 10/19/2009. Pertinent page 486. *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8216500B2 (en) * 2010-07-09 2012-07-10 Lm Glasfiber A/S Method of manufacturing pre-bent wind turbine blades
US20120007269A1 (en) * 2010-07-09 2012-01-12 Lm Glasfiber A/S Method of manufacturing pre-bent wind turbine blades
US20140234109A1 (en) * 2011-10-25 2014-08-21 Blade Dynamics Limited Method of making a root end joint of a wind turbine blade and a root segment for such a joint
US9897066B2 (en) * 2011-10-25 2018-02-20 Blade Dynamics Limited Method of making a root end joint of a wind turbine blade and a root segment for such a joint
US9970412B2 (en) 2012-09-26 2018-05-15 Blade Dynamics Limited Wind turbine blade
US10179425B2 (en) * 2013-04-08 2019-01-15 Vestas Wind Systems A/S Fibre preform for laying on a curved surface of a mould
US11092132B2 (en) * 2013-07-12 2021-08-17 Lm Wp Patent Holding A/S Method of manufacturing a wind turbine blade
US10704531B2 (en) 2014-03-20 2020-07-07 Wobben Properties Gmbh Wind turbine rotor blade with a rotor blade connection and method for producing same
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
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
US10422316B2 (en) 2016-08-30 2019-09-24 General Electric Company Pre-cured rotor blade components having areas of variable stiffness
US20210148329A1 (en) * 2019-11-14 2021-05-20 Siemens Gamesa Renewable Energy A/S Method for manufacturing root segment sections for a root segment of a turbine blade, method for manufacturing the root segment and method for manufacturing the turbine blade

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