• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    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).
    公开号:ES2751717A1
    申请号:ES201990090
    申请日:2017-08-29
    公开日:2020-04-01
    发明作者:Pascual Eneko Sanz；Costa Hely Ricardo Savii；De La Rua Ion Arocena；Saiz Emilio Rodriguez；Noel Andre Tamagnini
    申请人:Nabrawind Technologies SL；
    IPC主号:
    专利说明:

    [0001]
    [0002]
    [0003]
    [0004] Field of the Invention
    [0005] The present invention is included within the field of wind turbine towers, and more specifically in the connection or transition piece between the hybrid towers of the upper part in the tubular segment and the lower part in the lattice segment or “jacket”.
    [0006]
    [0007] Background
    [0008] The existing solutions presented in offshore tower technology 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 oil and gas platforms and is currently also used in offshore wind).
    [0009] This is demonstrated by the numerous state-of-the-art patent documents. WO2014095252 describes a transition body towards a multicolumn "jacket" structure, where said transition is designed as a mechanically-welded structure that achieves flexural rigidity 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 the patent application WO2015039852 where the transition piece is formed by a plurality of combined segments, the ones corresponding to the union with the jacket structure and the intermediate ones being rounded. The segments can be welded on site after transport.
    [0010] Another manufacturer of wind turbines also has transition pieces made up of different plates that are later welded together. This is shown in EP2072685 and EP2333163, where in the latter, rather than welding the transition piece, it welds through pairs of plates, the pieces that receive the “jacket” structure inside.
    [0011] Finally, EP2597227 describes a transition piece formed by the welding of four identical curved modules and four also identical triangular pieces, which when combined together make up a cone trunk.
    [0012] From all this it should be noted that the welds of the “jacket” structures are critical, since they are the source of possible failures and cracks, and are also very sensitive to the manual welding and inspection process. On the other hand, offshore structures are not transportable by land transport, they are manufactured alongside ports and are transported by ship.
    [0013] Description
    [0014] The design of the current invention is oriented towards both onshore and offshore wind turbines, replacing the mechanically welded parts known today and making the new transition parts transportable in conventional trucks.
    [0015] It is an object of the invention a lattice tubular tower connection, where the connection joins 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 that connect said cylindrical section with each of the lattice columns. The extensions are made in one piece through a ductile ferritic nodular cast process, and are bolted to the lattice columns and center section.
    [0016] Another object of the invention is a connection or transition piece for wind towers, both for the onshore and offshore sectors, with a hybrid mixture between tubular and lattice, in which said transition allows adapting a circumscribed lattice in a substantially larger diameter. that the diameter of the tubular tower and that has 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 connect said cylindrical section with each of the columns of lattice formed by the legs of the tower.
    [0017] It is another object of the invention that each one of the extensions is manufactured in a single piece through a ductile ferritic nodular casting process, which maintains a hollow interior, has flanges at its wide end to secure its fixation with the central section cylindrical and has a circular projection at its narrow end for fixing with the lattice columns. Furthermore, it comprises a cross section that progressively decreases from the cylindrical central section.
    [0018] It is another object of the invention that the fixing between pieces is carried out with threaded bolts that cross the mentioned end tabs. 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 threaded bolts are also used. This union can be by means of a bolt and its corresponding nut or by means of a bolt that goes through one of the parts to be joined and is threaded onto the second part to be joined (which is previously machined with an internal thread).
    [0019] It is another object of the invention that the central section is also made in one piece through a ductile ferritic nodular casting process.
    [0020] 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.
    [0021] The advantages of this system are:
    [0022] The components can be transported by road, expanding the productive capacity to all available manufacturing facilities and allowing the use of these structures for onshore and offshore wind turbines.
    [0023] The casting process is seamless, which improves the reliability of the product. It also allows reaching (with reasonable costs) large thicknesses in critical areas and very complex geometries, which allows increasing the resistance of the part at its most loaded points and reducing weight.
    [0024] Lastly, the material and casting process costs are lower than those of the mechanosoldered steel.
    [0025]
    [0026] Brief description of the drawings
    [0027] In the following, a series of drawings that help to better understand the invention and that expressly relate to an embodiment of said invention that is presented as a non-limiting example of it, is briefly described.
    [0028] Figure 1 is a general view of the wind turbine.
    [0029] Figure 2 shows the transition and, in a broken line, part of the two towers that it joins: a) in a front view and b) in a plan view.
    [0030] Figure 3 shows in detail the transition piece: a) view of its assembly and b) view of an exploded exploded view.
    [0031] Figure 4 shows the connecting elements according to two practical embodiments.
    [0032]
    [0033] Detailed description
    [0034] As shown in figure 1, the transition piece (1) is responsible for joining a tubular tower (2) that incorporates in its upper part a nacelle (3) and a complete rotor (4), with the tower lattice (5) resting on a foundation (6).
    [0035] In figure 2, the lattice tower (5) is a straight structure of columns (7) and crossbars (8) that make up 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. Therefore, the transition piece (1) adapts a geometry formed by a cylindrical central section (9) where the upper tubular tower (2) is installed and at least three extensions (10) that join said cylindrical section (9) 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) have 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 equidistributed way. Said extensions (10) are manufactured in a single piece through a ductile ferritic nodular casting process, which maintains a hollow interior, has flanges (11) at its wide end to secure its fixation with the cylindrical central section (9) and it has a circular projection (12) at its narrow end for fixing with the lattice columns (7). The dimensions of the central part (9) and extensions (10) are such that they can be transported in conventional trucks with the following restrictions and requirements:
    [0036] - Maximum height: 2.5-4 m.
    [0037] - Maximum width: 3.5-4.5 m.
    [0038] - Maximum length: 12 m.
    [0039] The cylindrical section (9) can also be manufactured in one piece by a ductile ferritic nodular casting process.
    [0040] 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 manufactured in one piece.
    [0041] Figure 4 shows the two types of possible joints. The fixing between the pieces that make up the transition piece (1) is carried out with threaded bolts that go through the flanges (11) of the ends of the extensions (10). Similarly, 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 unions can be by means of a bolt (13) and its corresponding nut (14) or by means of a bolt (15) that passes through one of the parts to be joined and is threaded on the second part to be joined, which is previously machined with a thread internal.
    [0042] The figure schematically represents the connection between the tubular part (2) with a cylindrical central section (9) and the connection between the cylindrical central section (9) and extensions (10), as the hexagonal head bolt (15) that passes through the part is used. to be joined (left figure) or the hex head bolt (13) with its nut and washer (14) (right figure).
    [0043] The invention also relates to a wind turbine comprising a tubular tower (2), a latticework (3) and the connection (1) that joins both elements.
    权利要求:
    Claims (1)
    [0001]
    1- Tubular tower connection (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 in that
    - it comprises a cylindrical central section (9) that joins with or forms part of the tubular tower (2), and a plurality of hollow extensions (10) that join 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
    - the extensions (10) being screwed to the columns (7) of the latticework (5) and to the central section (9).
    2- Tubular tower connection (2) with latticework (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- Tubular tower connection (2) with latticework (5) according to claim 2, wherein the diameter (d2) of the circumference in which the extensions (10) are circumscribed is at least double the diameter (d1) of the central section (9).
    4- Tubular tower connection (2) with latticework (5) according to any of the previous claims, where the extensions (10) are screwed to the central section (9) through flanges (11) arranged at one end of said extensions (10).
    5- Tubular tower connection (2) with lattice (5) according to any of the preceding claims, wherein the extensions (10) comprise a cross section that progressively decreases from the end attached to the central section (9).
    6- Tubular tower connection (2) with lattice (5) according to any of the preceding claims, comprising three equally distributed extensions (10).
    7- Tubular tower connection (2) with lattice (5) according to any of the preceding claims, wherein the central section (9) is also manufactured in one part through a ductile ferritic nodular casting process.
    8- Tubular tower connection (2) with latticework (5) according to any of the previous claims, where the screw connections are made by means of bolts with hexagonal head (13) and nut with washer (14).
    9- Tubular tower connection (2) with latticework (5) according to any of claims 1 to 7, where the screw connections are made by means of hexagonal head bolts (15) that are screwed directly on the threaded surface of the second element to link.
    10- Tubular tower connection (2) with latticework (5) according to any of the previous claims, wherein all the parts that compose it are transportable by road according to the restrictions and requirements of conventional transport.
    11- Wind turbine comprising a tubular tower (2) and a lattice (5), characterized in that it comprises a connection (1) according to any of the previous claims to join the tubular tower (2) and the lattice (5).
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    同族专利:
    公开号 | 公开日
    ES2751717B2|2020-11-20|
    WO2019043272A1|2019-03-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2006024244A1|2004-08-31|2006-03-09|Bard Engineering Gmbh|Foundation for an offshore-wind farm|
    NO330373B1|2009-08-31|2011-04-04|Aker Jacket Technology As|Download The transfer device|
    NO332791B1|2011-05-27|2013-01-14|Owec Tower As|Transition element for attaching a twine to a jacket|
    GB201117888D0|2011-10-17|2011-11-30|Windsea As|Transition piece for an offshore structure|DE112019007295T5|2019-10-31|2022-01-27|Nabrawind Technologies, S.L|TRANSITION PIECE FOR A WIND TURBINE TOWER|
    法律状态:
    2020-04-01| BA2A| Patent application published|Ref document number: 2751717 Country of ref document: ES Kind code of ref document: A1 Effective date: 20200401 |
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    优先权:
    申请号 | 申请日 | 专利标题
    PCT/ES2017/070589|WO2019043272A1|2017-08-29|2017-08-29|Connection for connecting a tubular tower to lattice work|
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