ES2613493T3 - Mejoras en o con relación a estructuras compuestas - Google Patents

Mejoras en o con relación a estructuras compuestas Download PDF

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Publication number
ES2613493T3
ES2613493T3 ES10720809.2T ES10720809T ES2613493T3 ES 2613493 T3 ES2613493 T3 ES 2613493T3 ES 10720809 T ES10720809 T ES 10720809T ES 2613493 T3 ES2613493 T3 ES 2613493T3
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core
layer
thickness
ram
functional
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Steve Appleton
Knud Stenbæk NIELSEN
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Qinetiq Ltd
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Qinetiq Ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/025—Electric or magnetic properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/067—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/212—Electromagnetic interference shielding
    • 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
    • F05B2260/00—Function
    • F05B2260/99—Radar absorption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/60—Properties or characteristics given to material by treatment or manufacturing
    • F05B2280/6003—Composites; e.g. fibre-reinforced
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/04—Composite, e.g. fibre-reinforced
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24298—Noncircular aperture [e.g., slit, diamond, rectangular, etc.]
    • Y10T428/24314—Slit or elongated
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Wind Motors (AREA)
  • Laminated Bodies (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Una estructura compuesta que comprende una capa funcional y un núcleo, el núcleo que comprende: una primera capa de núcleo; una segunda capa de núcleo; y una capa intermedia funcional dispuesta entre la primera y segunda capas del núcleo; en donde la primera capa de núcleo se dispone entre la capa funcional y la capa intermedia funcional; el grosor de la primera capa de núcleo es sustancialmente uniforme a través de la estructura compuesta; y la distancia entre la capa funcional y la capa intermedia funcional es sustancialmente constante a través de la estructura compuesta, y en donde además el grosor de la segunda capa de núcleo varía a través de la estructura compuesta para variar el grosor general del núcleo; y la capa funcional comprende una capa absorbente de RAM y la capa intermedia funcional comprende una capa reflectora de RAM.

Description

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primera capa de núcleo 22, que separa estas dos capas en la estructura compuesta 30. Para un diseño dado de la capa absorbente de RAM 28, se logra un desempeño del RAM consistente al garantizar que la primera capa de núcleo 22 sea de grosor sustancialmente uniforme a través de la estructura compuesta 30.
Se observará de que el núcleo dividido 20 está cubierto en la Figura 2b. Las hendiduras 32a, 32b se proporcionan en la primera y segunda capas del núcleo 22, 24 para promover el recubrimiento en una manera que se describe más adelante con referencia a las Figuras 6a y 6b.
Ignorando el grosor generalmente mínimo de la capa reflectora de RAM 26, el grosor total (T') del núcleo dividido 20 es la suma del grosor de la primera capa de núcleo 22 (t 1') y el grosor de la segunda capa de núcleo 24 (t2'); es decir T' = t1' + t2'.
Con referencia ahora a la Figura 3a, se muestra un núcleo dividido 40 de construcción unitaria y que comprende una primera capa de núcleo 42, una segunda capa de núcleo 44 y una capa intermedia funcional 46 en forma de una capa reflectora de RAM dispuesta entre las primera y segunda capas del núcleo 42, 44. El grosor de la primera capa de núcleo 42 (t1") es idéntico al grosor de la primera capa de núcleo 22 (t1') del núcleo dividido 20 de la Figura 2. Sin embargo, el grosor de la segunda capa de núcleo 44 (t2") es mayor que el grosor de la segunda capa de núcleo 24 (t2') del núcleo dividido 20 de la Figura 2. Por lo tanto, el grosor total (T") del núcleo dividido 40 de la Figura 3 es mayor que el grosor total (T') del núcleo dividido 20 de la Figura 2.
Una comparación de las Figuras 2 y 3 muestra que el grosor total T de los núcleos divididos 20, 40 puede variarse al variar solamente el grosor t2 de la segunda capa de núcleo 24, 44; el grosor t1 de la primera capa de núcleo 22, 42 puede permanecer igual independientemente del grosor total del núcleo T. El diseño de núcleo dividido por lo tanto permite que el grosor total del núcleo T varíe sin afectar la separación entre la capa reflectora de RAM 26, 46 y la capa absorbente de RAM 28, 48, que se determina por el grosor t1 de la primera capa de núcleo 24, 44. Por consiguiente, el diseño de una solución de RAM uniforme se simplifica independientemente del grosor total T. Esto contrasta con la técnica anterior mostrada en la Figura 1b, que requiere un diseño del absorbente de RAM diferente para cada grosor del núcleo. El núcleo dividido 20, 40 de la presente invención reduce la complejidad de la disposición, facilita el control de existencias y elimina el riesgo de uso de una tela de RAM incorrecta en una región dada de la estructura compuesta.
Un álabe de turbina eólica 50 de construcción de panel tipo sándwich que comprende un núcleo dividido 52 sustancialmente como se describió anteriormente se muestra esquemáticamente en la Figura 4a. El álabe 50 se extiende desde un extremo de la raíz 54 conectado a un buje del rotor 56, a un extremo de la punta 58. Como se muestra en las Figuras 4b y 4c, el núcleo dividido 52 tiene una primera capa de núcleo 60, una segunda capa de núcleo 62 y una capa intermedia de reflexión del radar 64 dispuesta entre las primera y segunda capas del núcleo 62, 64. Una capa absorbente de radar 66 se dispone cerca de la superficie exterior 68 del álabe 50.
Existe una necesidad de mayor resistencia estructural en el extremo de la raíz 54 que en el extremo de la punta 58. Por consiguiente, el núcleo 52 es más grueso en el extremo de la raíz 54 (Figura 4b) que en el extremo de la punta 58 (Figura 4c). Con referencia a las Figuras 4b y 4c, la segunda capa de núcleo 62 es relativamente gruesa (por ejemplo aproximadamente 30 mm) en una región cerca del extremo de la raíz 54 (Figura 4b) y relativamente delgada (por ejemplo aproximadamente 5 mm) en una región cerca del extremo de la punta 58 (Figura 4c). Sin embargo, la primera capa de núcleo 60 tiene el mismo grosor (por ejemplo aproximadamente 10 mm) en ambas regiones (Figura 4b y Figura 4c). Por lo tanto, la separación entre la capa absorbente de RAM 66 y la capa reflectora de RAM 64 es la misma en ambas regiones del álabe 50. Esto facilita las propiedades uniformes de RAM a través de ambas regiones. De hecho, se simplifica el diseño de un absorbente de RAM para usar en las diferentes regiones del álabe 50 de diferentes grosores del núcleo totales, siempre que el grosor de la primera capa de núcleo 60 en estas regiones sea el mismo. Ampliando esta idea, se puede usar un único diseño de tela de RAM a través de todo el álabe 50, siempre que la primera capa de núcleo 60 sea de un grosor sustancialmente uniforme a través del álabe 50.
También se observará que hay un recubrimiento relativamente alto hacia el extremo de la raíz 54 del álabe de turbina eólica 50, y un recubrimiento relativamente bajo hacia el extremo de la punta 58. Para adecuar estas características, las hendiduras en la segunda capa de núcleo 62 difieren de una localización a la siguiente, mientras que la configuración de la hendidura de la primera capa de núcleo 60 permanece igual. Específicamente, donde la segunda capa de núcleo 62 es relativamente gruesa en la región de recubrimiento alta cerca del extremo de la raíz 54, las hendiduras son relativamente anchas y se separan aún más que en la segunda capa de núcleo relativamente delgada 62 cerca del extremo de la punta 58. La relación preferida entre el grosor de la capa de núcleo, ancho de la hendidura y separación de la hendidura se describe en más detalle más abajo con referencia a las Figuras 6a y 6b.
Un beneficio adicional del diseño de núcleo dividido es que la capa reflectora de RAM incorporada 26, 46, 64 se protege en ambos lados por las primera y segunda capas del núcleo respectivamente. En los ejemplos adicionales de la invención, que no se muestran en las figuras, pueden incorporarse otros materiales en el núcleo 20, 40, 52. Por ejemplo, pueden incluirse fibras ópticas en la región entre las primera y segunda capas del núcleo (también denominada en la presente invención como la "región de capa intermedia"). En el contexto de álabes de turbinas eólicas, las fibras ópticas pueden utilizarse para medir las cargas experimentadas en varias localizaciones en los álabes. Ventajosamente, las fibras ópticas estarían protegidas por la construcción de núcleo dividido.
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Claims (1)

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ES10720809.2T 2009-04-23 2010-04-23 Mejoras en o con relación a estructuras compuestas Active ES2613493T3 (es)

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GB0907010 2009-04-23
GB0907010A GB0907010D0 (en) 2009-04-23 2009-04-23 Improvements in or relating to composite structures
PCT/GB2010/050668 WO2010122352A2 (en) 2009-04-23 2010-04-23 Improvements in or relating to composite structures

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ES2613493T3 true ES2613493T3 (es) 2017-05-24

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EP (1) EP2421700B1 (es)
KR (1) KR101310055B1 (es)
CN (1) CN102458823B (es)
BR (1) BRPI1006696A2 (es)
CA (1) CA2759300C (es)
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ES (1) ES2613493T3 (es)
GB (1) GB0907010D0 (es)
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DK2421700T3 (en) 2017-01-30
CN102458823A (zh) 2012-05-16
CA2759300A1 (en) 2010-10-28
WO2010122352A2 (en) 2010-10-28
EP2421700A2 (en) 2012-02-29
EP2421700B1 (en) 2016-12-21
GB0907010D0 (en) 2009-06-03
KR101310055B1 (ko) 2013-09-24
WO2010122352A3 (en) 2011-06-16
US9234499B2 (en) 2016-01-12
BRPI1006696A2 (pt) 2018-01-16
CA2759300C (en) 2018-09-25
US20120107553A1 (en) 2012-05-03
KR20120003949A (ko) 2012-01-11
CN102458823B (zh) 2015-07-29

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