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WO2019043272A1 - Connection for connecting a tubular tower to lattice work - Google Patents

Connection for connecting a tubular tower to lattice work Download PDF

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Publication number
WO2019043272A1
WO2019043272A1 PCT/ES2017/070589 ES2017070589W WO2019043272A1 WO 2019043272 A1 WO2019043272 A1 WO 2019043272A1 ES 2017070589 W ES2017070589 W ES 2017070589W WO 2019043272 A1 WO2019043272 A1 WO 2019043272A1
Authority
WO
WIPO (PCT)
Prior art keywords
lattice
tubular tower
connection
extensions
central section
Prior art date
Application number
PCT/ES2017/070589
Other languages
Spanish (es)
French (fr)
Inventor
Eneko Sanz Pascual
Hely Ricardo SAVII COSTA
Ion Arocena De La Rua
Emilio Rodriguez Saiz
Andre TAMAGNINI NOEL
Original Assignee
Nabrawind Technologies, Sl
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 Nabrawind Technologies, Sl filed Critical Nabrawind Technologies, Sl
Priority to ES201990090A priority Critical patent/ES2751717B2/en
Priority to PCT/ES2017/070589 priority patent/WO2019043272A1/en
Publication of WO2019043272A1 publication Critical patent/WO2019043272A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/08—Structures made of specified materials of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/08—Structures made of specified materials of metal
    • E04H12/10—Truss-like structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines
    • 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 is encompassed within the field of wind turbine towers, and more specifically in the connection or transition piece between the hybrid towers of upper part in tubular segment and lower part in lattice segment or "jacket". Background
  • WO2014095252 describes a transition body towards a multi-column "jacket" structure, where said transition is designed as a welded structure that achieves flexural stiffness with a design of radial walls, to which its thickness can be changed, welded to the Central core.
  • patent application WO2015039852 where the transition piece is formed by a plurality of combined segments, being rounded those corresponding to the union with the structure "jacket” and planes the intermediates. The segments can be welded in situ after transport.
  • transition pieces formed by different plates that are subsequently welded together. This is shown in EP2072685 and EP2333163, where in the latter, rather than welding the transition piece, welds through pairs of plates, the pieces that receive the "jacket" structure inside.
  • EP2597227 describes a transition piece formed by the welding of four identical modules with curvature and four triangular pieces also identical, which when combined together form a truncated cone.
  • the design of the current invention is geared towards both onshore and offshore wind turbines, replacing the mechanically welded parts known today and making the new parts of the transition transportable in conventional trucks.
  • An object of the invention is a tubular tower with lattice connection, wherein the connection connects a tubular tower of an onshore or offshore wind turbine with a lattice comprising a plurality of columns.
  • the connection comprises a cylindrical central section that joins with or forms part of the tubular tower and a plurality of hollow extensions joining said cylindrical section with each of the columns of the lattice.
  • the extensions are manufactured in one piece through a process of ductile ferritic nodular cast iron, and are bolted to the lattice columns and the central section.
  • Another object of the invention is a connection or transition piece for wind towers, both for the onshore sector and for offshore, with a hybrid mixture between tubular and lattice, in which said transition allows to adapt a circumscribed lattice in a substantially larger diameter that the diameter of the tubular tower and having a geometry formed by: a cylindrical central section where the upper monotubular tower is installed or that is part of it and a plurality of extensions that join said cylindrical section with each of the columns of lattice that form the legs of the tower.
  • each of the extensions is manufactured in one piece through a ductile ferritic nodular casting process, which keeps its interior hollow, has tabs at its wide end to secure its fixation with the central section cylindrical and has a projection in a circular shape at its narrow end for its attachment to the lattice columns.
  • it comprises a cross section that progressively decreases from the cylindrical central section.
  • the fixing between pieces is done with threaded bolts that pass through the mentioned end flanges.
  • threaded bolts that pass through the mentioned end flanges.
  • This connection can be by means of a bolt and its corresponding nut or by means of a bolt passing through one of the parts to be joined and threaded on the second part to be joined (which is previously machined with internal thread).
  • the central section is also manufactured in one piece through a ductile ferritic nodular casting process.
  • the central section is an integral part of the tubular tower, both tower segments being manufactured in one piece.
  • the components can be transported by road, expanding the production capacity to all available manufacturing facilities and allowing the use of these structures for onshore and offshore wind turbines.
  • the casting process has no welding, which improves the reliability of the product. It also allows to reach (with reasonable costs) large thicknesses in critical areas and very complex geometries, which increases the strength of the piece is its most loaded and reduce weight.
  • Figure 1 is a general view of the wind turbine.
  • Figure 2 shows the transition and, in broken line, part of the two towers that joins: a) in a frontal view and b) in a plan view.
  • Figure 3 shows in detail the transition piece: a) view of its assembly and b) view of an exploded exploded view.
  • Figure 4 shows the joining elements according to two practical embodiments.
  • the transition piece (1) is responsible for joining a tubular tower (2) that incorporates a nacelle (3) and a complete rotor (4), with the tower in its upper part. of latticework (5) resting on a foundation (6).
  • the lattice tower (5) is a straight structure of columns (7) and crosspieces (8) that compose modular and transportable sections of height between 10 and 14 m.
  • the diameter of the tubular tower (2) ranges between 4 and 5 m and the distance between the columns (7) of the lattice tower (5) reaches between 14 and 18 m.
  • the transition piece (1) adapts a geometry formed by a cylindrical central section (9) where the upper tubular tower (2) and at least three extensions (10) that join said cylindrical section (9) are installed with each one of the lattice columns (7) that form the legs of the lattice tower (5).
  • the extensions (10) are circumscribed in a circumference with a diameter (d2) substantially greater than the diameter (d1) of the central section (9).
  • each of the extensions (10) has a length greater than twice the diameter of the tubular tower (2).
  • the cylindrical section (9) is arranged in the center and the extensions (10) are distributed radially in an equidistant manner.
  • Said extensions (10) are manufactured in a single piece through a ductile ferritic nodular casting process, which keeps its interior hollow, has tabs (11) at its wide end to secure its fixation with the cylindrical central section (9) and has a projection in a circular form (12) at its narrow end for its attachment to the lattice columns (7).
  • the dimensions of the central piece (9) and the extensions (10) are such that they can be transported in conventional trucks with the following restrictions and requirements:
  • the cylindrical section (9) can also be manufactured in one piece by a ductile ferritic nodular casting process.
  • the figure schematically represents the union between tubular piece (2) with cylindrical central section (9) and the union between cylindrical central section (9) and extensions (10), depending on the use of the hexagonal head bolt (15) that goes through the piece to be joined (left figure) or the hexagonal head bolt (13) with its nut and washer (14) (right figure).
  • the invention also relates to a wind turbine comprising a tubular tower (2), a lattice (3) and the connection (1) connecting both elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

The invention relates to a connection for connecting a tubular tower to lattice work, the connection joining a tubular tower of an onshore or offshore wind turbine to lattice work that comprises a plurality of columns. The connection comprises a cylindrical central section (9) that is joined to or forms part of the tubular tower, and a plurality of hollow extensions (10) that join said cylindrical section (9) to each column of the lattice work. The extensions (10) are made in a single piece by means of a process of ductile iron casting and are screwed to the columns of the lattice work and to the central section (9).

Description

CONEXIÓN DE TORRE TUBULAR CON CELOSIA  CONNECTION OF TUBULAR TOWER WITH CELOSIA
DESCRIPCIÓN Campo de la invención DESCRIPTION Field of the invention
La presente invención se engloba dentro del campo de las torres de aerogeneradores, y más en concreto en la conexión o pieza de transición entre las torres híbridas de parte superior en segmento tubular y parte inferior en segmento de celosía o "jacket". Antecedentes  The present invention is encompassed within the field of wind turbine towers, and more specifically in the connection or transition piece between the hybrid towers of upper part in tubular segment and lower part in lattice segment or "jacket". Background
Las soluciones existentes que se presentan en la tecnología de torres offshore son grandes piezas de transición fabricadas por un proceso de mecano-soldado y dispuestas sobre una estructura de celosía definida como "jacket" (este término se utiliza para definir a la estructura metálica que soporta plataformas de gas y petróleo y actualmente también se utiliza en la eólica offshore).  The existing solutions that are presented in the technology of offshore towers are large transition pieces manufactured by a mechano-welded process and arranged on a lattice structure defined as "jacket" (this term is used to define the metal structure that supports gas and oil platforms and is currently also used in offshore wind).
Así lo demuestran los numerosos documentos de patente del estado de la técnica. WO2014095252 describe un cuerpo de transición hacia una estructura "jacket" multi- columna, donde la citada transición está diseñada como una estructura mecano-soldada que logra rigidez a flexión con un diseño de paredes radiales, a las que puede cambiarse su espesor, soldadas al núcleo central. En la misma línea y perteneciente al mismo solicitante está la solicitud de patente WO2015039852 donde la pieza de transición está formada por una pluralidad de segmentos combinados, siendo redondeados los correspondientes a la unión con la estructura "jacket" y planos los intermedios. Los segmentos pueden soldarse in situ tras su transporte.  This is demonstrated by the numerous patent documents of the state of the art. WO2014095252 describes a transition body towards a multi-column "jacket" structure, where said transition is designed as a welded structure that achieves flexural stiffness with a design of radial walls, to which its thickness can be changed, welded to the Central core. In the same line and belonging to the same applicant is patent application WO2015039852 where the transition piece is formed by a plurality of combined segments, being rounded those corresponding to the union with the structure "jacket" and planes the intermediates. The segments can be welded in situ after transport.
Otro fabricante de aerogeneradores también tiene piezas de transición formadas por distintas placas que posteriormente se sueldan entre sí. Así lo muestra en EP2072685 y EP2333163, donde en esta última, más que soldar la pieza de transición, suelda a través de parejas de placas, las piezas que reciben en su interior la estructura "jacket". Another manufacturer of wind turbines also has transition pieces formed by different plates that are subsequently welded together. This is shown in EP2072685 and EP2333163, where in the latter, rather than welding the transition piece, welds through pairs of plates, the pieces that receive the "jacket" structure inside.
Por último, EP2597227 describe una pieza de transición formada por la soldadura de cuatro módulos idénticos con curvatura y cuatro piezas triangulares también idénticas, que al combinarse entre sí componen un tronco de cono. Finally, EP2597227 describes a transition piece formed by the welding of four identical modules with curvature and four triangular pieces also identical, which when combined together form a truncated cone.
De todo ello se debe resaltar que las soldaduras de las estructuras "jacket" son críticas, ya que es origen de posibles fallos y grietas, siendo además muy sensibles al proceso manual de soldeo e inspección. Por otra parte, las estructuras offshore no son transportables en transportes terrestres, se fabrican junto a los puertos y se transportan en barco. Descripción From all this it should be noted that the welds of the "jacket" structures are critical, since it is the origin of possible failures and cracks, being also very sensitive to the manual process of welding and inspection. On the other hand, offshore structures are not transportable in land transport, they are manufactured next to ports and transported by ship. Description
El diseño de la actual invención está orientado hacia los aerogeneradores tanto onshore como offshore, sustituyendo las piezas mecano-soldadas conocidas en la actualidad y logrando que las nuevas piezas de la transición sean transportables en camiones convencionales.  The design of the current invention is geared towards both onshore and offshore wind turbines, replacing the mechanically welded parts known today and making the new parts of the transition transportable in conventional trucks.
Es un objeto de la invención una conexión de torre tubular con celosía, en donde la conexión une una torre tubular de un aerogenerador onshore u offshore con una celosía que comprende una pluralidad de columnas. La conexión comprende una sección central cilindrica que se une con o forma parte de la torre tubular y una pluralidad de extensiones huecas que unen dicha sección cilindrica con cada una de las columnas de la celosía. Las extensiones están fabricadas en una sola pieza a través de un proceso de fundición nodular ferrítica dúctil, y están atornilladas a las columnas de la celosía y a la sección central.  An object of the invention is a tubular tower with lattice connection, wherein the connection connects a tubular tower of an onshore or offshore wind turbine with a lattice comprising a plurality of columns. The connection comprises a cylindrical central section that joins with or forms part of the tubular tower and a plurality of hollow extensions joining said cylindrical section with each of the columns of the lattice. The extensions are manufactured in one piece through a process of ductile ferritic nodular cast iron, and are bolted to the lattice columns and the central section.
Es otro objeto de la invención una conexión o pieza de transición para torres eólicas, tanto para el sector onshore como para el offshore, con una mezcla híbrida entre tubular y celosía, en las que dicha transición permite adaptar una celosía circunscrita en un diámetro sustancialmente mayor que el diámetro de la torre tubular y que tiene una geometría formada por: una sección central cilindrica donde se instala la torre monotubular superior o que forma parte de la misma y una pluralidad de extensiones que unen dicha sección cilindrica con cada una de las columnas de celosía que forman las patas de la torre. Another object of the invention is a connection or transition piece for wind towers, both for the onshore sector and for offshore, with a hybrid mixture between tubular and lattice, in which said transition allows to adapt a circumscribed lattice in a substantially larger diameter that the diameter of the tubular tower and having a geometry formed by: a cylindrical central section where the upper monotubular tower is installed or that is part of it and a plurality of extensions that join said cylindrical section with each of the columns of lattice that form the legs of the tower.
Es otro objeto de la invención que cada una de las extensiones se fabrica en una sola pieza a través de un proceso de fundición nodular ferrítica dúctil, que mantiene hueco su interior, dispone de pestañas en su extremo ancho para afianzar su fijación con la sección central cilindrica y tiene un resalte en forma circular en su extremo estrecho para su fijación con las columnas de celosía. Además, comprende una sección transversal que disminuye progresivamente desde la sección central cilindrica. It is another object of the invention that each of the extensions is manufactured in one piece through a ductile ferritic nodular casting process, which keeps its interior hollow, has tabs at its wide end to secure its fixation with the central section cylindrical and has a projection in a circular shape at its narrow end for its attachment to the lattice columns. In addition, it comprises a cross section that progressively decreases from the cylindrical central section.
Es otro objeto de la invención que la fijación entre piezas se realiza con pernos roscados que atraviesan las mencionadas pestañas de los extremos. Así como en la unión entre la sección central cilindrica y la torre monotubular y en la unión entre las extensiones y las columnas de la torre de celosía, donde también se utilizan pernos roscados. Esta unión puede ser mediante un perno y su correspondiente tuerca o bien mediante un perno que atraviesa una de las partes a unir y se rosca sobre la segunda parte a unir (la cual está previamente mecanizada con rosca interna).  It is another object of the invention that the fixing between pieces is done with threaded bolts that pass through the mentioned end flanges. As well as in the union between the cylindrical central section and the monotubular tower and in the union between the extensions and the columns of the lattice tower, where also threaded bolts are used. This connection can be by means of a bolt and its corresponding nut or by means of a bolt passing through one of the parts to be joined and threaded on the second part to be joined (which is previously machined with internal thread).
Es otro objeto de la invención que la sección central también está fabricada en una sola pieza a través de un proceso de fundición nodular ferrítica dúctil.  It is another object of the invention that the central section is also manufactured in one piece through a ductile ferritic nodular casting process.
Por último, es otro objeto de la invención que la sección central es parte integrante de la torre tubular, fabricándose en una pieza ambos segmentos de torre. Las ventajas que aporta este sistema son: Finally, it is another object of the invention that the central section is an integral part of the tubular tower, both tower segments being manufactured in one piece. The advantages that this system provides are:
Los componentes pueden ser transportables por carretera, ampliando la capacidad productiva a todas las instalaciones de fabricación disponibles y permitiendo el empleo de estas estructuras para aerogeneradores onshore y offshore.  The components can be transported by road, expanding the production capacity to all available manufacturing facilities and allowing the use of these structures for onshore and offshore wind turbines.
El proceso de fundición no tiene soldaduras, lo que mejora la fiabilidad del producto. También permite llegar (con costes razonables) a grandes espesores en zonas críticas y a geometrías muy complejas, lo que permite aumentar la resistencia de la pieza es sus puntos más cargados y reducir el peso. The casting process has no welding, which improves the reliability of the product. It also allows to reach (with reasonable costs) large thicknesses in critical areas and very complex geometries, which increases the strength of the piece is its most loaded and reduce weight.
Por último, los costes de material y proceso de fundición son menores a los del mecano- soldado de acero.  Lastly, the costs of the casting material and process are lower than those of the steel welded.
Breve descripción de los dibujos BRIEF DESCRIPTION OF THE DRAWINGS
A continuación, se pasa a describir de manera muy breve una serie de dibujos que ayudan a comprender mejor la invención y que se relacionan expresamente con una realización de dicha invención que se presenta como un ejemplo no limitativo de ésta.  Next, a series of drawings that help to better understand the invention and that are expressly related to an embodiment of said invention that is presented as a non-limiting example thereof, is briefly described.
La Figura 1 es una vista general del aerogenerador. Figure 1 is a general view of the wind turbine.
La Figura 2 muestra la transición y, en línea discontinua, parte de las dos torres que une: a) en una vista frontal y b) en una vista en planta.  Figure 2 shows the transition and, in broken line, part of the two towers that joins: a) in a frontal view and b) in a plan view.
La Figura 3 muestra en detalle la pieza de transición: a) vista de su conjunto y b) vista de un despiece explosionado.  Figure 3 shows in detail the transition piece: a) view of its assembly and b) view of an exploded exploded view.
La Figura 4 muestra los elementos de unión según dos realizaciones prácticas.  Figure 4 shows the joining elements according to two practical embodiments.
Descripción detallada Detailed description
Tal y como se muestra en la figura 1 , la pieza de transición (1) es la responsable de unir una torre tubular (2) que incorpora en su parte superior una nacelle (3) y un rotor completo (4), con la torre de celosía (5) que descansa sobre una cimentación (6).  As shown in Figure 1, the transition piece (1) is responsible for joining a tubular tower (2) that incorporates a nacelle (3) and a complete rotor (4), with the tower in its upper part. of latticework (5) resting on a foundation (6).
En la figura 2, la torre de celosía (5) es una estructura recta de columnas (7) y travesaños (8) que componen tramos modulares y transportables de altura entre 10 y 14 m. El diámetro de la torre tubular (2) oscila entre los 4 y 5 m y la distancia entre las columnas (7) de la torre de celosía (5) alcanza entre 14 y 18 m. Por ello, la pieza de transición (1) adapta una geometría formada por una sección central cilindrica (9) donde se instala la torre tubular superior (2) y al menos tres extensiones (10) que unen dicha sección cilindrica (9) con cada una de las columnas de celosía (7) que forman las patas de la torre de celosía (5). Las extensiones (10) quedan circunscritas en una circunferencia con un diámetro (d2) sustancialmente mayor que el diámetro (d1) de la sección central (9). Así, cada una de las extensiones (10) tiene una longitud mayor de dos veces el diámetro de la torre tubular (2). Tal y como se muestra en las figuras 3a y 3b, la sección cilindrica (9) se dispone en el centro y las extensiones (10) se distribuyen radialmente de forma equidistribuida. Dichas extensiones (10) se fabrican en una sola pieza a través de un proceso de fundición nodular ferrítica dúctil, que mantiene hueco su interior, dispone de pestañas (11) en su extremo ancho para afianzar su fijación con la sección central cilindrica (9) y tiene un resalte en forma circular (12) en su extremo estrecho para su fijación con las columnas de celosía (7). Las dimensiones de la pieza central (9) y de las extensiones (10) son tales que pueden transportarse en camiones convencionales con las siguientes restricciones y requerimientos: In figure 2, the lattice tower (5) is a straight structure of columns (7) and crosspieces (8) that compose modular and transportable sections of height between 10 and 14 m. The diameter of the tubular tower (2) ranges between 4 and 5 m and the distance between the columns (7) of the lattice tower (5) reaches between 14 and 18 m. For this reason, the transition piece (1) adapts a geometry formed by a cylindrical central section (9) where the upper tubular tower (2) and at least three extensions (10) that join said cylindrical section (9) are installed with each one of the lattice columns (7) that form the legs of the lattice tower (5). The extensions (10) are circumscribed in a circumference with a diameter (d2) substantially greater than the diameter (d1) of the central section (9). Thus, each of the extensions (10) has a length greater than twice the diameter of the tubular tower (2). As shown in Figures 3a and 3b, the cylindrical section (9) is arranged in the center and the extensions (10) are distributed radially in an equidistant manner. Said extensions (10) are manufactured in a single piece through a ductile ferritic nodular casting process, which keeps its interior hollow, has tabs (11) at its wide end to secure its fixation with the cylindrical central section (9) and has a projection in a circular form (12) at its narrow end for its attachment to the lattice columns (7). The dimensions of the central piece (9) and the extensions (10) are such that they can be transported in conventional trucks with the following restrictions and requirements:
- Altura máxima: 2,5-4 m.  - Maximum height: 2.5-4 m.
- Anchura máxima: 3,5-4,5 m.  - Maximum width: 3.5-4.5 m.
Longitud máxima: 12 m.  Maximum length: 12 m
La sección cilindrica (9) se puede fabricar también en una sola pieza mediante un proceso de fundición nodular ferrítica dúctil. The cylindrical section (9) can also be manufactured in one piece by a ductile ferritic nodular casting process.
También existe otra realización práctica en que la sección central (9) es parte integrante de la torre tubular (2), fabricándose en una pieza ambas secciones de torre.  There is also another practical embodiment in which the central section (9) is an integral part of the tubular tower (2), both tower sections being made in one piece.
En la figura 4 se muestran los dos tipos de uniones posibles. La fijación entre las piezas que componen la pieza de transición (1) se realiza con pernos roscados que atraviesan las pestañas (11) de los extremos de las extensiones (10). Del mismo modo, en la unión entre la sección central cilindrica (9) y la torre tubular (2) y en la unión entre las extensiones (10) y las columnas (7) de la torre de celosía (5), también se utilizan pernos roscados. Estas uniones pueden ser mediante un perno (13) y su correspondiente tuerca (14) o bien mediante un perno (15) que atraviesa una de las partes a unir y se rosca sobre la segunda parte a unir, la cual está previamente mecanizada con rosca interna.  In Figure 4 the two types of possible joints are shown. The fixing between the pieces that make up the transition piece (1) is done with threaded bolts that go through the flanges (11) of the ends of the extensions (10). In the same way, at the junction between the cylindrical central section (9) and the tubular tower (2) and at the junction between the extensions (10) and the columns (7) of the lattice tower (5), they are also used threaded bolts. These connections can be by means of a bolt (13) and its corresponding nut (14) or by means of a bolt (15) that goes through one of the parts to be joined and is threaded on the second part to be joined, which is previously machined with thread internal
La figura representa esquemáticamente la unión entre pieza tubular (2) con sección central cilindrica (9) y la unión entre sección central cilindrica (9) y extensiones (10), según se utilice el perno con cabeza hexagonal (15) que atraviesa la pieza a unir (figura izquierda) o el perno de cabeza hexagonal (13) con su tuerca y su arandela (14) (figura derecha). The figure schematically represents the union between tubular piece (2) with cylindrical central section (9) and the union between cylindrical central section (9) and extensions (10), depending on the use of the hexagonal head bolt (15) that goes through the piece to be joined (left figure) or the hexagonal head bolt (13) with its nut and washer (14) (right figure).
La invención también se refiere a un aerogenerador que comprende una torre tubular (2), una celosías (3) y la conexión (1) que une ambos elementos. The invention also relates to a wind turbine comprising a tubular tower (2), a lattice (3) and the connection (1) connecting both elements.

Claims

REIVINDICACIONES
1- Conexión de torre tubular (2) con celosía (5), en donde la conexión (1) une una torre tubular (2) de un aerogenerador onshore u offshore con una celosía (5) que comprende una pluralidad de columnas (7), caracterizada porque 1- Connection of tubular tower (2) with lattice (5), where the connection (1) joins a tubular tower (2) of an onshore or offshore wind turbine with a lattice (5) comprising a plurality of columns (7) , characterized because
comprende una sección central (9) cilindrica que se une con o forma parte de la torre tubular (2), y una pluralidad de extensiones (10) huecas que unen dicha sección cilindrica (9) con cada una de las columnas (7) de la celosía (5), estando las extensiones (10) fabricadas en una sola pieza a través de un proceso de fundición nodular ferrítica dúctil, y  It comprises a central section (9) cylindrical which joins with or forms part of the tubular tower (2), and a plurality of hollow extensions (10) joining said cylindrical section (9) with each of the columns (7) of the lattice (5), the extensions (10) being made in one piece through a ductile ferritic nodular casting process, and
estando las extensiones (10) atornilladas a las columnas (7) de la celosía (5) y a la sección central (9).  the extensions (10) being screwed to the columns (7) of the lattice (5) and to the central section (9).
2- Conexión de torre tubular (2) con celosía (5) según la reivindicación 1 , en donde las extensiones (10) quedan circunscritas en una circunferencia con un diámetro (d2) sustancialmente mayor que el diámetro (d1) de la sección central (9). 2- Connection of tubular tower (2) with lattice (5) according to claim 1, wherein the extensions (10) are circumscribed in a circumference with a diameter (d2) substantially greater than the diameter (d1) of the central section ( 9).
3- Conexión de torre tubular (2) con celosía (5) según la reivindicación 2, en donde el diámetro (d2) de la circunferencia en la que quedan circunscritas las extensiones (10) es al menos el doble que el diámetro (d1) de la sección central (9). 3- Connection of tubular tower (2) with lattice (5) according to claim 2, wherein the diameter (d2) of the circumference in which the extensions (10) are circumscribed is at least twice the diameter (d1) of the central section (9).
4- Conexión de torre tubular (2) con celosía (5) según cualquiera de las reivindicaciones anteriores, en donde las extensiones (10) se atornillan a la sección central (9) a través de pestañas (11) dispuestas en un extremo de dichas extensiones (10). 4- Connection tubular tower (2) with lattice (5) according to any of the preceding claims, wherein the extensions (10) are screwed to the central section (9) through tabs (11) arranged at one end of said extensions (10).
5- Conexión de torre tubular (2) con celosía (5) según cualquiera de las reivindicaciones anteriores, en donde las extensiones (10) comprenden una sección transversal que va disminuyendo progresivamente desde el extremo unido a la sección central (9). 5- Tubular tower connection (2) with lattice (5) according to any of the preceding claims, wherein the extensions (10) comprise a cross section that decreases progressively from the end attached to the central section (9).
6- Conexión de torre tubular (2) con celosía (5) según cualquiera de las reivindicaciones anteriores, que comprende tres extensiones (10) equidistribuidas. 6- Connection tubular tower (2) with lattice (5) according to any of the preceding claims, comprising three extensions (10) equidistribuidas.
7- Conexión de torre tubular (2) con celosía (5) según cualquiera de las reivindicaciones anteriores, en donde la sección central (9) se fabrica también en una sola pieza a través de un proceso de fundición nodular ferrítica dúctil. 8- Conexión de torre tubular (2) con celosía (5) según cualquiera de las reivindicaciones anteriores, en donde las uniones atornilladas se realizan mediante pernos con cabeza hexagonal (13) y tuerca con arandela (14). 7- Connection of tubular tower (2) with lattice (5) according to any of the previous claims, wherein the central section (9) is also manufactured in one piece through a ductile ferritic nodular casting process. 8- Connecting tubular tower (2) with lattice (5) according to any of the preceding claims, wherein the bolted connections are made by bolts with hexagonal head (13) and nut with washer (14).
9- Conexión de torre tubular (2) con celosía (5) según cualquiera de las reivindicaciones 1 a 7, en donde las uniones atornilladas se realizan mediante pernos con cabeza hexagonal (15) que se atornillan directamente sobre la superficie roscada del segundo elemento a unir. 9- Connection tubular tower (2) with lattice (5) according to any of claims 1 to 7, wherein the screwed connections are made by bolts with hexagonal head (15) that are screwed directly on the threaded surface of the second element a link.
10- Conexión de torre tubular (2) con celosía (5) según cualquiera de las reivindicaciones anteriores, en donde todas las piezas que lo componen son transportables por carretera según las restricciones y los requerimientos de un transporte convencional. 1 1- Aerogenerador que comprende una torre tubular (2) y una celosía (5), caracterizado porque comprende una conexión (1) según cualquiera de las reivindicaciones anteriores para unir la torre tubular (2) y la celosía (5). 10- Connecting tubular tower (2) with lattice (5) according to any of the preceding claims, wherein all the parts that compose it are transportable by road according to the restrictions and requirements of a conventional transport. 1- Wind turbine comprising a tubular tower (2) and a lattice (5), characterized in that it comprises a connection (1) according to any of the preceding claims for joining the tubular tower (2) and the lattice (5).
PCT/ES2017/070589 2017-08-29 2017-08-29 Connection for connecting a tubular tower to lattice work WO2019043272A1 (en)

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ES201990090A ES2751717B2 (en) 2017-08-29 2017-08-29 TUBULAR TOWER CONNECTION WITH CELOSIA
PCT/ES2017/070589 WO2019043272A1 (en) 2017-08-29 2017-08-29 Connection for connecting a tubular tower to lattice work

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112019007295T5 (en) 2019-10-31 2022-01-27 Nabrawind Technologies, S.L TRANSITION PIECE FOR A WIND TURBINE TOWER

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Publication number Priority date Publication date Assignee Title
WO2006024244A1 (en) * 2004-08-31 2006-03-09 Bard Engineering Gmbh Foundation for an offshore-wind farm
EP2290237A2 (en) * 2009-08-31 2011-03-02 Aker Jacket Technology AS A load transferring device in a wind turbine support structure
GB2495830A (en) * 2011-10-17 2013-04-24 Windsea As Transition piece for an offshore wind turbine with attached walkway on the leeward side.
US20140075864A1 (en) * 2011-05-27 2014-03-20 Owec Tower As Transition element for connecting a tower to a jacket

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006024244A1 (en) * 2004-08-31 2006-03-09 Bard Engineering Gmbh Foundation for an offshore-wind farm
EP2290237A2 (en) * 2009-08-31 2011-03-02 Aker Jacket Technology AS A load transferring device in a wind turbine support structure
US20140075864A1 (en) * 2011-05-27 2014-03-20 Owec Tower As Transition element for connecting a tower to a jacket
GB2495830A (en) * 2011-10-17 2013-04-24 Windsea As Transition piece for an offshore wind turbine with attached walkway on the leeward side.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112019007295T5 (en) 2019-10-31 2022-01-27 Nabrawind Technologies, S.L TRANSITION PIECE FOR A WIND TURBINE TOWER
US11767682B2 (en) 2019-10-31 2023-09-26 Nabrawind Technologies, S.L Transition piece for wind turbine tower
DE112019007295B4 (en) 2019-10-31 2024-07-04 Nabrawind Technologies, S.L TRANSITION PIECE FOR A WIND TURBINE TOWER

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ES2751717A1 (en) 2020-04-01

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