WO2012119778A1 - Construction de pale d'éolienne - Google Patents

Construction de pale d'éolienne Download PDF

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Publication number
WO2012119778A1
WO2012119778A1 PCT/EP2012/001043 EP2012001043W WO2012119778A1 WO 2012119778 A1 WO2012119778 A1 WO 2012119778A1 EP 2012001043 W EP2012001043 W EP 2012001043W WO 2012119778 A1 WO2012119778 A1 WO 2012119778A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
blade
core material
layer
wind turbine
Prior art date
Application number
PCT/EP2012/001043
Other languages
English (en)
Inventor
Flemming MORTENSEN
Esther Peterslund
Lennart Kuehlmeier
Original Assignee
Suzlon Blade Technology B.V.
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
Application filed by Suzlon Blade Technology B.V. filed Critical Suzlon Blade Technology B.V.
Publication of WO2012119778A1 publication Critical patent/WO2012119778A1/fr

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/546—Measures for feeding or distributing the matrix material in the reinforcing structure
    • B29C70/547—Measures for feeding or distributing the matrix material in the reinforcing structure using channels or porous distribution layers incorporated in or associated with the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping 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
    • B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • B29C70/865—Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/082—Blades, e.g. for helicopters
    • B29L2031/085—Wind turbine 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
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • 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 present invention relates to a blade for a wind turbine, more particularly, a blade comprising a sandwich panel with a core and with external skin layers, and a method of manufacture thereof.
  • a cross-section of a section of a known sandwich- core blade for a wind turbine is indicated at 10.
  • the blade 10 comprises an inner core 12 of a low-density material, e.g. polyvinyl chloride (PVC), styrene- acrylonitrile (SAN), and an outer laminate skin 14 of a suitable skin material, e.g. glass fibre, aluminium.
  • a low-density material e.g. polyvinyl chloride (PVC), styrene- acrylonitrile (SAN), and an outer laminate skin 14 of a suitable skin material, e.g. glass fibre, aluminium.
  • a planar body of material for the inner core 12 having a given grade or density, e.g. 60 kg/m 3 PVC or SAN.
  • a planar body of material for the inner core 12 having a given grade or density, e.g. 60 kg/m 3 PVC or SAN.
  • the material is scored wherein a series of lateral and longitudinal channels or grooves 16 are cut into the planar body of the core material 12, the grooves 16 generally having a triangular cross-section. Any particular arrangement of grooves may be used, with a simple regular grid arrangement normally preferred.
  • the core material 12 is then positioned in an injection mould, which causes the core to take the shape of a blade profile. Glass fibre layers (or any other suit- able skin material) are applied to the surfaces of the core material 12, and appropriate resin is then injected into the mould. Once the resin has cured, the laminate skin 14 has hardened forming a suitable part of a wind turbine blade ready for use.
  • a composite blade for a wind turbine comprising a sandwich panel having:
  • inter layer comprising a second core material, wherein said inter layer is located between said external skin layer and said core.
  • first and second core materials are not any fibre layer type materials, rather are relatively light-weight, high rigidity materials suitable for use in the core of a blade sandwich panel, e.g. balsa, or any suitable monomer- or polymer-based sub- stance, e.g. polyvinyl chloride (PVC), urethane, polyethylene terephthalate (PET), styrene-acrylonitrile (SAN), polystyrene, polymethacrylimide (PMI), etc.
  • PVC polyvinyl chloride
  • PET polyethylene terephthalate
  • SAN styrene-acrylonitrile
  • PMI polymethacrylimide
  • said second core material has a greater structural strength relative to said first core material.
  • said second core material has a greater density relative to said first core material.
  • said first core material has a density of between 40-80 kg/m 3 and said second core material has a density of between 80-300 kg/m 3 .
  • the panel comprises a second inter layer of the second core material (or of a third core material), wherein said first inter layer and said second inter layer are provided at opposite sides of said internal core.
  • said at least one inter layer is of a reduced thickness relative to said internal core.
  • the thickness of said at least one inter layer is between 5%-15% of the thickness of the internal core.
  • said second core material has a greater structural strength relative to said first core material.
  • said second inter layer is formed of a third core material, preferably said third core material has a greater structural strength relative to said first core material, and wherein said third core material has a greater or lower structural strength relative to said second core material.
  • said resin bridge extends through at least a portion of said core and at least one inter layer.
  • a composite blade for a wind turbine comprising a sandwich panel with:
  • said core comprises a layer of first core material and at least one layer of second core material, said layer of second core material provided adjacent said external skin layer, wherein said second core material has a greater structural strength relative to said first core material, and wherein said resin bridge extends through at least a portion of said first core material layer and said second core material layer.
  • the term resin bridge refers to a joint of cured resin which is found in the core section of certain types of composite panels for wind turbine blades, caused due to the features of the manufacturing process used to produce the blades/panels.
  • the resin bridge may extend into a portion of the core, or may extend through the entire core, the ends provided in for example a thin mesh provided at either side of the core material.
  • the second core material is of a higher grade than the first core material, e.g. it is of a stronger type of material, or a material with greater density, this improves the structural rigidity of the blade core and reduces the likelihood of cracks forming in the core.
  • said second core material has a greater density relative to said first core material.
  • said first core material has a density of between 40-80 kg/m 3 and said second core material has a density of between 80-300 kg/m 3 .
  • said at least one layer of said second core material is of a reduced thickness relative to said layer of said first core material.
  • the weight and cost of the total blade is minimised.
  • the thickness of said at least one layer of said second core material is between 5%-15% of the thickness of the internal core. Further preferably, between 6%-10%.
  • said at least one resin bridge comprises a tapered cross-section having a narrow end and a wide end, and wherein the narrow end of said at least one resin bridge is provided proximate said at least one layer of second core material.
  • the narrow end of the resin bridge is provided adjacent to or surrounded by the stronger second core material, this improves the resistance of the blade/panel to any cracks that would normally form in the region of the narrow end (or tip) of a resin bridge.
  • 'proximate' it is meant that the narrow end of the resin bridge is provided in, at or adjacent to the at least one layer of second core material.
  • the narrow end of the resin bridge is provided in the at least one layer of second core material, but due to the manufacturing process used, the resin bridge may extend through the at least one layer of second core material, but end close to the layer.
  • said internal core comprises a first layer and a second layer of said second core material, said first and second layers provided at opposite sides of said layer of said first core material, adjacent said external skin layer.
  • the sandwich arrangement of stronger, higher grade, second core material around the lighter first core material in the centre provides for a stronger overall blade construction, while keeping the weight of the core section of the blade/panel to a minimum.
  • said narrow end of said at least one resin bridge is provided proximate a first layer of said second core material and said wide end of said at least one resin bridge is provided proximate a second layer of said second core material.
  • first core material and said second core material are formed of the same material, wherein said second core material has a relatively higher grade than said first core material.
  • said first and said second core material may be of any suitable monomer or polymer substance.
  • said first core material and said second core material are selected from the following: polyvinyl chloride (PVC), styrene-acrylonitrile (SAN), polystyrene, polymethacrylimide (PMI).
  • said external skin layer may be any suitable fibre or fibre- composite material.
  • said external skin layer is formed from one or more of the following: glass fibre, aluminium, carbon, basalt.
  • a wind turbine comprising a wind turbine tower, a nacelle provided on said tower, and a rotor provided at said nacelle, said rotor having at least one rotor blade, wherein the wind turbine comprises at least one blade as described.
  • Said step of forming at least one groove in said core may be accomplished by any suitable method of making grooves in the core material, e.g. cutting. Furthermore, said step of performing a resin moulding operation on said core may include any suitable moulding process, e.g. infusion, pre-preg vacuum bagging, etc.
  • said step of laminating comprises laminating at least a portion of said first surface of said planar body and at least a portion of a second sur- face of said planar body opposite said first surface.
  • said step of laminating is configured such that said layer of said second core material is of a reduced thickness relative to said planar body of said first core material.
  • Fig. 1 shows a cross-section of a portion of a prior art composite blade/panel for a wind turbine
  • Fig. 2 shows a cross-section of a portion of a composite blade/panel for a wind turbine according to a first embodiment of the invention
  • Fig. 3 shows a cross-section of a portion of a composite blade/panel for a wind turbine according to a second embodiment of the invention
  • Fig. 4 shows a perspective view of a three-bladed wind turbine according to the invention.
  • a first embodiment of a composite-core blade/panel 20 for a wind turbine 100 is indicated generally at 20, having an upper face 20a and a lower face 20b.
  • the blade/panel 20 comprises an internal core section 22 and an external skin section 24.
  • the external skin section 24 may be formed from any suitable material known for use as an external skin for a wind turbine blade, e.g. a fibre or fibre-composite material. This may include, but is not limited to, composite skins formed from glass fibres, carbon fibres, basalt fibres, alumin- ium fibre or sheet materials, etc.
  • the internal core section 22 comprises a first, central, layer of core material of a first type 26, and an upper and a lower layer of a second core material 28, 30.
  • the thin layers 28, 30 of second core material are provided at either side of the layer of first core material 26, between the first core material 26 and the external skin section 24.
  • the first and second core materials are preferably formed from any suitable low-weight, high rigidity material, e.g. balsa, or any suitable monomer- or polymer-based substance, e.g. polyvinyl chloride (PVC), urethane, polyethylene terephthalate (PET), styrene-acrylonitrile (SAN), polystyrene, polymethacrylimide (PMI), etc.
  • PVC polyvinyl chloride
  • PET polyethylene terephthalate
  • SAN styrene-acrylonitrile
  • PMI polymethacrylimide
  • the second core material 28,30 does not include any type of fibre layer material, e.g. a fibre glass layer.
  • the first core material 26 and the second core material 28, 30 differ in that the second core material 28,30 is of a higher strength than the first core material 26.
  • This may be in the form of the first and second materials being the same base core material, but the second core material being of a higher grade (e.g. denser, stronger, etc.), or the second core material being an alternative core material to the first with higher overall strength, stiffness, and fracture toughness relative to the first core material.
  • said first and second core materials 26, 28, 30 may be formed as integral parts of a single core body 22, e.g. localised layers of higher density core material formed at the upper and lower sides of the overall sandwich panel core.
  • a plurality of resin bridges 32 are provided in the internal core section 22.
  • the resin bridges 32 shown in Fig. 2 have a tapered, substantially triangular cross-section, and extend from a first wide end 32a abutting the external skin section 24 at the upper face 20a of the blade/panel 20, to a second tip end 32b proximate to the external skin section 24 at the lower face 20b of the blade/panel 20.
  • the wide ends 32a of the resin bridges 32 are contained within the upper layer of the second core material 28, while the tip ends 32b of the resin bridges 32 are contained within the lower layer of the second core material 30.
  • the ends 32a, 32b of the resin bridges 32 are contained within the relatively stronger higher grade second core material 28,30, alleviates the stress concentration within the blade/panel core section 22, and reduces the crack propagation of any initiated damage in the region of the ends 32a,32b of the resin bridges 32.
  • the method of manufacture of such a composite-core blade/panel 20 is as follows. Firstly, a portion of a first core material is provided in the general dimensions required for a blade for a wind turbine or for a composite sandwich panel. Then, first and second layers of a second core material are adhered to the upper and lower surfaces of the first core material to form a core, wherein the second core material is of a higher grade than the first core material. A plan outline of a blade/panel is cut from this portion of core, and a series of channels or grooves are scored in the core, to allow the moulding or shaping of the core into the desired shape and profile for the wind turbine blade or sandwich panel. The channels or grooves are cut so that the lower end of each channel (e.g.
  • the relatively narrow "tip end" of a triangular-cross- sectional channel is provided in one of the layers of second core material.
  • the channels may be cut such that the channels extend through the core, in which case the opening at the lower end of the channel is provid- ed at one of the layers of second core material.
  • any suitable method of forming channels or grooves in the core may be used.
  • a mat of fibres are laid in a mould, to form the lower layer of the outer skin of a part for a blade.
  • the scored composite core is placed into the mould on top of the lower layer of fibres, the channels or grooves of the composite core allowing for the core to be shaped into the desired blade profile.
  • a second mat of fibres is then laid on top of the exposed upper surface of the composite blade core, this second mat being used to form the upper layer of the outer skin of a blade.
  • the mould is then sealed, and resin infused or injected into the mould.
  • the resin acts to fuse the fibres, and also fills up in the channels formed in the composite core. (In filling up the channels formed in the core, it will be understood that due to the moulding/shaping of the core, some of the channels may be relatively more open, while some may be relatively more closed.)
  • the resin is then cured to harden the fibre layers about the composite core, forming the wind turbine blade.
  • the mould can then be opened and the completed blade/panel removed. It will be understood that any suitable alternative methods of moulding may be utilised, e.g. pre-preg vacuum bagging.
  • the channels are cut so that the lower ends of the channels are provided in a layer of second core material, this ensures that the lower end of the cured resin contained in the channels (the resin bridges) will also be provided in the layer of second core material.
  • the higher grade second core material provides for increased strength in this region, and reduces the impact of stress fractures occurring in the region of the lower ends of the resin bridges.
  • a grid-like arrangement of cut channels in the body of the core section are provided to allow for the flexion of the core about the longitudinal and lateral axes of the blade, so that the core section can be formed into an appropriate blade profile prior to the application and curing of the external skin.
  • the channels are provided such that the longitudinal channels are cut into, say, the upper face of the core, while the lateral channels are cut into the lower face of the core.
  • Such a configuration is particularly suited to the blade/panel 20 described above, as the tip ends of resin bridges formed in such channels will be found at both the upper and lower faces of the core, and as such will be contained within the upper and lower layers of second core material.
  • the tip ends of the resultant resin bridges will all be provided proximate to the opposite side of the core section, i.e. proximate to the lower face of the core.
  • the weight and cost of the final blade can be minimised further by having only a single layer of second core material in the core section, provided at the lower face of the core section, such that the tip ends of the resin bridges are contained in the relatively stronger second core material.
  • the core material may then be adhered to a thin mesh to form the shape of the internal core.
  • pockets of second core material at those locations of the core section where it is predicted that the tip ends of the resin bridges will eventually be formed.
  • Such pockets provide the benefit of the stronger, more fault-resistant second core material at the point of likely failure (i.e. the tip ends of the resin bridges), but reduces the amount of second core material required (and consequently the total weight and/or cost of the finished blade/panel) to a minimum.
  • the thickness of the high-grade, second core material layers can be related to the thickness of the low-grade first core material layer.
  • Table 1 provides an example outline of the thickness relationship for an example composite blade (grade dimensions are provided in kg/m 3 ).
  • the thickness of the low-grade material layer can be chosen to be between 5%-15% of the thickness of the total composite blade/panel core. In particular, between 6%-10%. It will be understood that other enhancements of this configuration may be employed, e.g. further layers of different types of core material may be provided at different locations in the core, for example the layers may be configured such that the grade of the material used in the core decreases with increasing distance from the external skin layer.
  • a second embodiment of a composite-core blade/panel for a wind turbine is indicated generally at 40, having an upper side 40a and a lower side 40b.
  • the blade/panel 40 comprises a first core section 42. Similar to the embodiment described above, a series of slits 44 are cut or formed into the first core section 42, substantially extending from the upper side 40a of the first core section 42 towards the lower side 40b.
  • the first core section 42 is placed within a blade mould for forming a composite core sandwich panel blade, the slits 44 allowing for the first core section 42 to be shaped into the desired blade profile in the mould.
  • a second core section 46 is provided on the upper side 40a of the first core section 42, with a fibre layer 48 positioned between the first core section 42 and the second core section 46.
  • the fibre layer 48 may comprise a low-weight pre-impregnated fibre fabric or fibre mat.
  • the fibre layer 48 may be inserted as a separate layer between the first core section 42 and the second core section 46 during the manufacturing process, or the fibre layer 48 may be provided as pre-attached to the lower surface of the second core section 46.
  • the resin carried in the fibre layer 48 will spread into the slits 44 of the first core section 42, such that when the assembly is cured, resin bridges 50 are formed in the slits 44.
  • the blade/panel 40 may be laminated with at least one external skin layer 24, as described in relation to the above embodiment.
  • the particular construction of this embodiment provides for greater structural strength of the blade/panel 40, and reduces the impact of any failure at likely resin bridge points.
  • Another advantage provided is that the step of laminating the upper and lower sides 40a,40b of the blade/panel 40 is avoided until after laying up in the blade mould.
  • the use of a pre-impregnated fibre or mat en- sures adhesion between the first core section 42 and the second core section 46 during lay-up.
  • said fibre layer 48 may be perforated, or may have apertures defined thereon, to facilitate the pas- sage of resin through said fibre layer 48.
  • the fibre or mat 48 may be pre- impregnated using any suitable pre-preg resins, hot-melt resins, hand lay-up resins, etc.
  • a further layer of second core material 46 may be provided at the lower side 40b of the first core material 42, to further reinforce the blade/panel 40 structure.
  • This further layer of second core material 46 may be provided with or without an intervening fibre fabric or fibre mat layer.
  • the second core section 46 of Fig. 3 is shown as without slits formed in the material, it will be understood that slits may be formed in the body of the material as required, in order to facilitate bending of the second core section 46. However, if the second core section 46 is sufficiently thin, it may be possible to provide the second core section 46 without slits.
  • the second core section 46 is formed from a core material having a higher strength than the material of said first core section. It will be understood that the same basic core material type may be used in the first and second sections, but said second core section should be of a higher grade or density of core material.
  • the core material used may be different from said second core material 46, and may comprise a third core material.
  • said third core material has a higher strength/density than said first core material, to further provide for reinforcement of said panel 40.
  • said second and third core materials do not include fibre layer material types, e.g. glass fibre layers.
  • the advantages of the composite-core blade/panel of the invention include: 1 ) A more robust sandwich for configurations where there is a risk of cracks initiating at resin bridges or other surface stress concentration effects;
  • a wind turbine is indicated generally at 100.
  • the wind turbine 100 comprises a wind turbine tower 102, a nacelle 104 provided at the top of said tower 102, and a rotor hub 106 having a plurality of rotor blades 108 provided at said nacelle 104.
  • said rotor blades 108 may be formed from any of the composite-core blades/panels as dis- cussed.
  • the invention is not limited to use in a three-bladed wind turbine rotor blades, and that any number of rotor blades may be employed.
  • REFERENCE NUMBERS panel 20 upper face 20a; 40a lower face 20b; 40b internal core section 22; 42 external skin section 24; 44 first core material 26; 42 second core material 28,30; 46 resin bridges 32; 50 first wide end 32a second tip end 32b fibre layer 48

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Composite Materials (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne une structure composite de pale pour une pale d'éolienne et un procédé de fabrication de celle-ci. L'âme de la pale est constituée d'une première matière d'âme légère et d'une seconde matière d'âme de qualité et/ou de résistance structurelle supérieures. La seconde matière est disposée en une couche relativement mince sur l'extérieur de la première matière d'âme, de sorte que les extrémités de pointe de tout pont de résine dans l'âme peuvent être contenues à l'intérieur de la seconde matière d'âme. Comme la seconde matière d'âme est d'une qualité supérieure à la première, cela augmente la résistance de l'âme de pale aux fissures ou autres défauts naissant au bout du pont de résine. Comme on n'utilise qu'une quantité relativement faible de seconde matière d'âme par rapport à la première matière d'âme, cela se traduit par une réduction de coût et une diminution maximale de poids de l'ensemble de la pale.
PCT/EP2012/001043 2011-03-08 2012-03-08 Construction de pale d'éolienne WO2012119778A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201100155 2011-03-08
DKPA201100155A DK177291B1 (en) 2011-03-08 2011-03-08 A wind turbine blade

Publications (1)

Publication Number Publication Date
WO2012119778A1 true WO2012119778A1 (fr) 2012-09-13

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PCT/EP2012/001043 WO2012119778A1 (fr) 2011-03-08 2012-03-08 Construction de pale d'éolienne

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DK (1) DK177291B1 (fr)
WO (1) WO2012119778A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN114673627A (zh) * 2022-03-22 2022-06-28 远景能源有限公司 一种芯材结构及风机叶片

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GB2448468A (en) * 2007-10-08 2008-10-22 Gurit Composite laminated articles having foam core
WO2009003476A1 (fr) * 2007-06-29 2009-01-08 Lm Glasfiber A/S Procédé d'utilisation d'un bloc d'âme apte au formage dans le cadre d'un processus d'imprégnation de résine
US20110031759A1 (en) * 2009-08-05 2011-02-10 Nitto Denko Corporation Foam filling material for wind power generator blades, foam filling member for wind power generator blades, wind power generator blade, wind power generator, and method for producing the wind power generator blade

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US20020025423A1 (en) * 2000-07-21 2002-02-28 Dreher Michael A. Method of fabricating a composite part including a resin impregnated fiber shell and an expandable syntactic foam core
WO2009003476A1 (fr) * 2007-06-29 2009-01-08 Lm Glasfiber A/S Procédé d'utilisation d'un bloc d'âme apte au formage dans le cadre d'un processus d'imprégnation de résine
GB2448468A (en) * 2007-10-08 2008-10-22 Gurit Composite laminated articles having foam core
US20110031759A1 (en) * 2009-08-05 2011-02-10 Nitto Denko Corporation Foam filling material for wind power generator blades, foam filling member for wind power generator blades, wind power generator blade, wind power generator, and method for producing the wind power generator blade

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CN114673627A (zh) * 2022-03-22 2022-06-28 远景能源有限公司 一种芯材结构及风机叶片
CN114673627B (zh) * 2022-03-22 2023-09-22 远景能源有限公司 一种芯材结构及风机叶片
WO2023179485A1 (fr) * 2022-03-22 2023-09-28 远景能源有限公司 Structure de matériau de noyau et pale d'éolienne

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