DK180536B1 - Sealing system for an offshore wind turbine and a wind turbine with such a sealing system - Google Patents

Sealing system for an offshore wind turbine and a wind turbine with such a sealing system Download PDF

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Publication number
DK180536B1
DK180536B1 DKPA201970784A DKPA201970784A DK180536B1 DK 180536 B1 DK180536 B1 DK 180536B1 DK PA201970784 A DKPA201970784 A DK PA201970784A DK PA201970784 A DKPA201970784 A DK PA201970784A DK 180536 B1 DK180536 B1 DK 180536B1
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DK
Denmark
Prior art keywords
support structure
sealing system
sealing
wind turbine
lower section
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DKPA201970784A
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Danish (da)
Inventor
Fog Gjersøe Nils
Frej Henningsen Jesper
Leth Mads
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Vattenfall Ab
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Priority to DKPA201970784A priority Critical patent/DK180536B1/en
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Publication of DK201970784A1 publication Critical patent/DK201970784A1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/027—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto steel structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • 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
    • E04H12/085—Details of flanges for tubular masts
    • 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

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wind Motors (AREA)

Abstract

A sealing system (1) is disclosed for arranging inside a support structure (3) of an off-shore wind turbine for sealing the inside of a lower section (2) of the support structure (3) off from an upper section (4) of the support structure (3), said sealing system (1) comprising - a closing structure (7) extending in a radial direction (RD) and configured to be arranged substantially horizontally inside the support structure (3); - a supporting arrangement (8, 10, 11) configured for supporting the closing structure (7) on the inside of the support structure (3); - a sealing element (12) being sealingly connected to the closing structure (7) along a first closed path; and - expansion means (13, 14) configured for moving a contact part of the sealing element (12) in the radial direction (RD) from a contracted position to an extended position for abutting an inner wall (15) of the support structure (3) along a second closed path, so that the sealing element (12) and the closing structure (7) form a substantially moisture-tight sealing across the support structure (3).

Description

DK 180536 B1 1 A SEALING SYSTEM FOR AN OFF-SHORE WIND TURBINE AND A WIND
TURBINE HAVING SUCH SEALING SYSTEM Field of the invention The present invention relates to a sealing system for an off-shore wind turbine for providing a substantially moisture-tight sealing across a lower section of the support structure as well as to a wind turbine comprising such sealing system. Background Arrangements in off-shore wind turbines for preventing moisture from the inside of e.g. a monopile to raise to the internal space of upper parts of the support structure of a wind turbine, such as into the transition piece are known in the art, e.g. from the disclosure of US 2019/040844 A1 in which a support edge is provided on the inside of the monopile so that an airtight seal can be formed by —a floor resting on the support edge. International patent application WO 2018/070868 A1 discloses a slip joint seal- ing system for being arranged between an inside surface of an upper part of a support structure of an off-shore wind turbine generator and an outside surface of a lower part of the support structure to form a water tight and gas tight seal- ing between the two. It is an object of the present invention to provide an alternative system for providing a substantially moisture-tight sealing across a lower section of the support structure of an off-shore wind turbine, which is cost optimized. Brief description of the invention The present invention provides a sealing system for arranging inside a support structure of an off-shore wind turbine for sealing the inside of a lower section of the support structure off from an upper section of the support structure, said sealing system comprising a closing structure extending in a radial direction and configured to be arranged substantially horizontally inside the support structure; a supporting arrangement configured for supporting the closing struc- ture on the inside of the support structure; a sealing element being sealingly
DK 180536 B1 2 connected to the closing structure along a first closed path; and expansion means configured for moving a contact part of the sealing element in the radial direction from a contracted position to an extended position for abutting an in- ner wall of the support structure along a second closed path, so that the sealing element and the closing structure form a substantially moisture-tight sealing across the support structure. Hereby, a support edge or any similar structure need not be provided on the in- ner wall of the support structure in order to provide a moisture-tight sealing, and the time-consuming and thereby costly process of fastening the support edge or the like to the inner wall by e.g. welding can be spared. Furthermore, the welding in itself may weaken the support structure or alter its mechanical prop- erties in an unwanted manner, which can be avoided with the present inven- tion.
It is preferred that the closing structure has a substantially circular extent in the radial direction with a first outer diameter, which is in correspondence with the usual circular inner cross-section of most support structures of off-shore wind turbines.
For the same reason, the sealing element is preferably formed as an annular element. The sealing element is in a preferred embodiment a membrane, in particular formed as a conical element. In alternative embodiments, the sealing element may be form as or comprise one or more inflatable member, such as an annu- lar tube. The preferred material for the sealing element is a synthetic rubber such as polychloroprene, which is also known by the trade name of neoprene. The sealing system is preferably formed to be suitable for use inside a support structure having a substantially circular inner cross-sectional opening in a hori- zontal plane.
DK 180536 B1 3 The expansion means are in preferred embodiments of the invention config- ured to move the contact part of the sealing element at least 20 cm, preferably at least 30 cm, such as in the range of 20 to 70 cm, preferably in the range of 30 to 50 cm in the radial direction between the contracted position and the ex- tended position thereof. The expansion means are preferably configured to move the contact part of the sealing element to extend at least 20 cm, preferably at least 30 cm, such as in the range of 20 to 60 cm, preferably in the range of 30 to 50 cm beyond an outermost rim of the closing structure.
In a preferred embodiment, the supporting system comprises a number of an- choring brackets fastened to the closing structure and extending upwards from the closing structure. The anchoring brackets may be equipped with connecting means for connecting to an inner flange part of the lower section for connecting the lower section and the upper section of the support structure above the level of the closing structure.
Also, the anchoring brackets may include an extension mechanism having a plurality of extension element being configured to be moved between an ex- tended position and a contracted position thereof, and wherein the sealing ele- ment is connected to the extension elements of the extension mechanism.
The present invention also relates to an off-shore wind turbine foundation com- prising a support structure having a lower section and an upper section, and a sealing system as described herein, wherein the sealing system is arranged to form a substantially moisture-tight sealing across an inner opening of the lower section of the support structure.
The lower section of the support structure of the off-shore wind turbine may be provided with an inner flange for connecting the lower section to the upper sec- tion of the support structure, in which case it is preferred that the outer circum- ference of the closing structure and the sealing element of the sealing system
DK 180536 B1 4 when the sealing element is in the contracted position is of a size allowing the sealing system to pass through said inner flange of the lower section during mounting of the sealing system.
Furthermore, the upper section of the support structure may also be equipped with an inner flange, in which case it is preferred that the outer circumference of the closing structure and the sealing element of the sealing system when the sealing element is in the contracted position is of a size allowing the sealing system to pass through said inner flange of the upper section during mounting of the sealing system. Also, the closing structure is preferably supported from such an inner flange of the upper section of the support structure for connecting the upper section to the lower section of the support structure, in one embodiment the closing struc- ture is supported on an upper surface of the inner flange of the upper section. The lower section of the support structure is preferably a monopile, and the up- per section of the support structure is preferably a so-called transition piece. Brief description of the drawings An embodiment of the present invention is illustrated in the enclosed drawings, of which Fig. 1 is a cross-sectional side view of support structure of an off-shore wind turbine and a sealing system prior to installation of the latter, Fig. 2 is a side view of the sealing system of Fig. 1 during installation, Fig. 3 is a side view of the sealing system of Figs. 1 and 2 when installed, Fig. 4 is a perspective, detailed view of the sealing system of Figs. 1 to 3 in the expanded state, where the sealing element and the closing structure are omit- ted for illustrative reasons, Fig. 5 is a second, perspective view similar to Fig. 4, Fig. 6 is another perspective, detailed view of the sealing system of Figs. 1 to 4 in the pre-expanded state, where the sealing element and the closing structure are omitted for illustrative reasons,
DK 180536 B1
Fig. 7 is a second, perspective view similar to Fig. 6, Fig. 8 is yet another perspective, detailed view of the sealing system of Figs. 1 to 5 in the expanded state, where the sealing element is shown, and Fig. 9 is a second, perspective view similar to Fig. 8. 5 . Alternatives to the shown embodiment can be envisioned by the skilled person and some alternatives are discussed herein.
Detailed description Figs. 1 to 3 illustrates the process for installing a sealing system 1 according to the present invention for sealing off a lower part 2 of a support structure 3 for an off-shore wind turbine from an upper part 4 of the support structure 3. Ac- cording to one embodiment, the lower part 2 is a monopile that has been driven into the seabed, but the lower part 2 could also be a part of another type of an off-shore foundation for a wind turbine, such as e.g. a tripod, a jacket, a gravity- based foundation or a floating foundation structure.
The common feature of these foundations is that there is a need to seal off the lower part 2 from the up- per part 4 of the support structure in a substantially moisture-tight manner in or- der to protect sensitive parts, such as control systems, electric switchgears and other electric installations in the upper part 4 of the support structure 3. The up- per part 4 will often be a so-called transition piece arranged to support the wind turbine tower on the foundation and may comprise boat-landing and access ladder, switchgear, crane and/or other equipment and means for enabling ser- vice access to the off-shore wind turbine.
In the example shown, the upper part 4 is provided at its lower end with an in- ner flange 5 for cooperating with an inner flange 6 of the lower part 2 for con- necting the upper part 4 and the lower part 2. The connection is made by means of a plurality of bolts (not shown) extending vertically through both flanges 5, 6. The sealing system 1 comprises a closing structure 7 in the form of a circular steel plate which extends in a radial direction RD of the closing structure 7 with
DK 180536 B1 6 a diameter DC smaller than the smallest diameter DF of the annular shaped in- ner flange 6 of the lower part 2 so that the closing structure 7 can pass the in- ner flange 6 when the sealing system 1 is installed in the support structure 3. The closing structure 7 may be provided with inspection openings and the like, which during normal operation are sealed off.
The closing structure 7 is equipped with a plurality of anchoring brackets 8 equidistantly distributed along the periphery of the closing structure 7 for sup- porting the sealing system from the inner flange 5 of the upper part 4 of the support structure 3 as shown in Figs. 2 and 3. The anchoring brackets 8 each comprises an upright part 10 connected at the lower end to the closing struc- ture 7 and a support part 11 connected to the upper end of the upright part 10, where the support part is intended to support the sealing system from the inner flange 5. In an alternative embodiment, the support part 11 is designed to be supported on an upper surface 9 of the inner flange 5 of the upper part 4. Furthermore, the sealing system 1 comprises a sealing element 12 in the form of a flexible, annular membrane made from neoprene, a synthetic rubber also known as polychloroprene.
The membrane 12 is at an inner part sealed to the closing structure 7 along a closed path and is connected at an outer part to ex- pansion braces 13, which are discussed further below with reference to Figs. 4 and 5. The expansion braces 13 may be moved in the radial direction RD by means of expansion rods 14 connected to the support part 11 of the anchoring brackets 8 in a manner that allows the expansion rods 14 to moved vertically and be fixed to the support part 11 in the displaced position.
The membrane 12 shown in the example is of a conical shape, but could in an alternative embodiment be of a flat shape, where either the inner wall 15 of the lower part 2 of the support structure 3 or the expansion braces 13 are equipped with a sealing rim, such as an O-ring to ensure that the sealing system when in the extended position as shown in Fig. 3 provides a substantially moisture-tight
DK 180536 B1 7 sealing across the support structure 3. In yet another embodiment of the pre- sent invention (not shown), the sealing element 12 comprises or consists of an inflatable annular tube.
The sealing system 1 is installed by introducing it into the upper part 4 of the support structure 3 and fixing the support parts 11 of the anchoring brackets 8 to the flange 5 thereof as shown in Fig. 1, where the sealing system 1 is shown pre-mounted in the upper part 4 in its contracted position, where the sealing el- ement 12 is of a size allowing it to pass the inner flange 6 of the lower part 2 of the support structure 3. The upper part 4 together with the sealing system 1 is then lowered onto the lower part 2 as shown in Fig. 2, where the closing struc- ture 7 and the sealing member 12 in the form of the membrane 12 extends be- low the inner flange 6 of the lower part 2 of the support structure 3.
In the next step of the installation of the sealing system 1, the expansion rods 14 are moved outwardly in the radial direction RD so as to move the outer part of the membrane 12 into abutting contact with the inner wall 15 of the lower part 2 of the support structure 3 by moving the expansion braces 13 connected to the membrane 12. The sealing system 1 is shown in Fig. 3 where the mem- brane 12 is in its extended position and that a substantially moisture-tight seal- ing is provided across the lower part 2 of the support structure 3.
The sealing system 1 is shown in the extended position in Figs. 4 and 5, where the membrane 12 and the closing structure 7 are omitted for providing a clearer view of the arrangement of the expansion braces 13. The expansion braces 13 are positioned in an extension of each other to form an annulus as opposed to the staggered arrangement in the contracted position shown in Figs. 6 and 7. The sealing system 1 is shown in the contracted position in Figs. 6 and 7, where the membrane 12 and the closing structure 7 are omitted for providing a clearer view of the arrangement of the expansion braces 13. The braces 13 are connected on one side to the outer ends of the expansion rods 14, which are connected to the anchoring brackets 8. The braces 13 are on their outer side curved with a radius of curvature corresponding to the curvature of the inner
DK 180536 B1 8 wall 15 of the lower part 2 of the support structure 3, i.e. as segments of an an- nular structure.
The length and arrangement of the individual expansion braces 13 and their connection to the membrane 8 allows the expansion braces 13 to be placed in an overlapping manner when the sealing system 1 is in the con-
tracted position as shown in Figs 6 and 7, whereby a cross-section of the mem- brane 8 is smaller than the smallest diameter DF of the inner flanges 5, 6, thus allowing the closing structure 7 and the membrane 12 in its contracted position to be installed in the upper part 4 from the top thereof and to be lowered down through the flange 6 from the upper part 4 to the lower part 2 of the support structure 3 during installation of the sealing system 1. The expansion braces 13 are forced outwardly in the radial direction RD by means of the expansion rods 14 and press the outer rim of the membrane 12 into abutting contact with the inner wall 15 of the lower part 2 of the support structure when the sealing system is installed as shown in Fig. 3. The sealing system 1 is shown in its entirety in Fig. 8 and 9 with the membrane 12 in the extended position.
DK 180536 B1 9 Reference numerals Sealing system 1 Lower part of a support structure 2 Support structure for an off-shore wind turbine 3 Upper part of the support structure 4 Inner flange of the upper part 5 Inner flange of the lower part 6 Closing structure 7 Anchoring brackets 8 Upper surface of inner flange of upper part 9 Upright part of brackets 10 Support part of brackets 11 Membrane, sealing element 12 Expansion braces 13 Expansion rods 14 Inner wall of lower part of support structure 15 Radial direction of closing structure RD Diameter of closing structure DC Smallest diameter of inner flanges DF

Claims (18)

DK 180536 B1 1 PatentkravDK 180536 B1 1 Patentkrav 1. Tætningssystem (1) til anbringelse inde i en støttestruktur (3) af en off- shore-vindturbine til tætning af den indvendige side af en nedre sektion (2) af støttestrukturen (3) mod en øvre sektion (4) af støttestrukturen (3), hvilket tæt- ningssystem (1) omfatter - en lukkestruktur (7), der strækker sig i en radial retning (RD) og er indrettet til at blive anbragt i det væsentlige horisontalt inde i støttestrukturen (3); - kendetegnet ved et støttesystem (8, 10, 11), der er indrettet til at støtte lukkestrukturen (7) på den indvendige side af støttestrukturen (3); - et tætningselement (12), som er tætningsmæssigt forbundet med lukkestrukturen (7) langs en første lukket vej; og - ekspansionsmidler (13, 14), som er indrettet til at bevæge en kon- taktdel af tætningselementet (12) i den radiale retning (RD) fra en tilbagetruk- ken position til en udstrakt position for at støde op til en indvendig væg (15) af støttestrukturen (3) langs en anden lukket vej, således at tætningselementet (12) og lukkestrukturen (7) danner en i det væsentlige fugttæt tætning over støttestrukturen (3).Sealing system (1) for placing inside a support structure (3) of an offshore wind turbine for sealing the inside of a lower section (2) of the support structure (3) against an upper section (4) of the support structure ( 3), which sealing system (1) comprises - a closing structure (7) extending in a radial direction (RD) and arranged to be arranged substantially horizontally inside the support structure (3); - characterized by a support system (8, 10, 11) arranged to support the closing structure (7) on the inside of the support structure (3); - a sealing element (12) which is sealingly connected to the closing structure (7) along a first closed path; and - expansion means (13, 14) adapted to move a contact portion of the sealing member (12) in the radial direction (RD) from a retracted position to an extended position to abut an inner wall ( 15) of the support structure (3) along a second closed path so that the sealing element (12) and the closing structure (7) form a substantially moisture-tight seal over the support structure (3). 2. Tætningssystem (1) ifølge krav 1, hvor lukkestrukturen (7) har en i det væ- sentlige cirkulær udstrækning i den radiale retning (RD) med en første udven- dig diameter (DC).Sealing system (1) according to claim 1, wherein the closing structure (7) has a substantially circular extent in the radial direction (RD) with a first outer diameter (DC). 3. Tætningssystem (1) ifølge et hvilket som helst af de foregående krav, hvor tætningselementet (12) er udformet som et ringformet element.Sealing system (1) according to any one of the preceding claims, wherein the sealing element (12) is designed as an annular element. 4. Tætningssystem (1) ifølge krav 3, hvor tætningselementet (12) er en mem- bran.Sealing system (1) according to claim 3, wherein the sealing element (12) is a membrane. DK 180536 B1 2DK 180536 B1 2 5. Tætningssystem (1) ifølge krav 4, hvor tætningselementet (12) er udformet som et konisk element.Sealing system (1) according to claim 4, wherein the sealing element (12) is designed as a conical element. 6. Tætningssystem (1) ifølge et hvilket som helst af de foregående krav, hvor tætningselementet (12) er fremstillet af syntetisk gummi såsom polychlorpren.A sealing system (1) according to any one of the preceding claims, wherein the sealing element (12) is made of synthetic rubber such as polychloroprene. 7. Tætningssystem (1) ifølge et hvilket som helst af de foregående krav, der er egnet til anvendelse inde i en støttestruktur (3), som har en i det væsentlige cirkulær indvendig tværsnitsåbning i et horisontalt plan.Sealing system (1) according to any one of the preceding claims, suitable for use inside a support structure (3) having a substantially circular inner cross-sectional opening in a horizontal plane. 8. Tætningssystem (1) ifølge et hvilket som helst af de foregående krav, hvor ekspansionsmidlerne (13, 14) er indrettet til at bevæge kontaktdelen af tæt- ningselementet (12) mindst 20 cm, fortrinsvis mindst 30 cm, såsom i området fra 20 til 70 cm, fortrinsvis i området fra 30 til 50 cm i den radiale retning (RD) mellem den tilbagetrukne position og den udstrakte position deraf.Sealing system (1) according to any one of the preceding claims, wherein the expansion means (13, 14) are arranged to move the contact part of the sealing element (12) at least 20 cm, preferably at least 30 cm, such as in the range from 20 to 70 cm, preferably in the range from 30 to 50 cm in the radial direction (RD) between the retracted position and the extended position thereof. 9. Tætningssystem (1) ifølge et hvilket som helst af de foregående krav, hvor ekspansionsmidlerne (13, 14) er indrettet til at bevæge kontaktdelen af tæt- ningselementet (12) med henblik på at forlænges mindst 20 cm, fortrinsvis mindst 30 cm, såsom i området fra 20 til 60 cm, fortrinsvis i området fra 30 til 50 cm ud over en yderste kant af lukkestrukturen (7).Sealing system (1) according to any one of the preceding claims, wherein the expansion means (13, 14) are arranged to move the contact part of the sealing element (12) in order to extend at least 20 cm, preferably at least 30 cm, such as in the range from 20 to 60 cm, preferably in the range from 30 to 50 cm beyond an outer edge of the closure structure (7). 10. Tætningssystem (1) ifølge et hvilket som helst af de foregående krav, hvor støttesystemet (8, 10, 11) omfatter et antal af forankringsholdere (8), der er fastgjort til lukkestrukturen (7) og strækker sig opad fra lukkestrukturen (7).Sealing system (1) according to any one of the preceding claims, wherein the support system (8, 10, 11) comprises a number of anchoring holders (8) attached to the closing structure (7) and extending upwards from the closing structure (7). ). 11. Tætningssystem ifølge krav 10, hvor forankringsholderne (8) er udstyret med forbindelsesmidler (11) til at forbindes med en indvendig flangedel (6) af den nedre sektion (2) for at forbinde den nedre sektion (2) og den øvre sektion (4) af støttestrukturen (3) over niveauet af lukkestrukturen (7).Sealing system according to claim 10, wherein the anchoring holders (8) are provided with connecting means (11) for connecting to an inner flange part (6) of the lower section (2) for connecting the lower section (2) and the upper section ( Of the support structure (3) above the level of the closure structure (7). 12. Tætningssystem ifølge krav 10 eller 11, hvor forankringsholderne (8) om- fatter en forlængelsesmekanisme (13, 14), som har en flerhed af forlængelse- selementer (13), der er indrettet til at bevæges mellem en udstrakt position ogA sealing system according to claim 10 or 11, wherein the anchoring holders (8) comprise an extension mechanism (13, 14) having a plurality of extension elements (13) adapted to move between an extended position and DK 180536 B1 3 en tilbagetrukken position deraf, og hvor tætningselementet (12) er forbundet med forlængelseselementerne (13) af forlængelsesmekanismen (13, 14).DK 180536 B1 3 a retracted position thereof, and wherein the sealing element (12) is connected to the extension elements (13) by the extension mechanism (13, 14). 13. Off-shore-vindturbinefundament, der omfatter en støttestruktur (3), som har en nedre sektion (2) og en øvre sektion (4), og et tætningssystem (1) ifølge et hvilket som helst af kravene 1 til 12, hvor tætningssystemet (1) er anbragt således, at det danner en i det væsentlige fugttæt tætning over en indvendig åbning af den nedre sektion (2) af støttestrukturen (3).An offshore wind turbine foundation comprising a support structure (3) having a lower section (2) and an upper section (4), and a sealing system (1) according to any one of claims 1 to 12, wherein the sealing system (1) is arranged so as to form a substantially moisture-tight seal over an inner opening of the lower section (2) of the support structure (3). 14. Off-shore-vindturbinefundament ifølge krav 13, hvor den nedre sektion (2) af støttestrukturen (3) er forsynet med en indvendig flange (6) til at forbinde den nedre sektion (2) med den øvre sektion (4) af støttestrukturen (3).An offshore wind turbine foundation according to claim 13, wherein the lower section (2) of the support structure (3) is provided with an inner flange (6) for connecting the lower section (2) to the upper section (4) of the support structure. (3). 15. Off-shore-vindturbinefundament ifølge krav 14, hvor den ydre omkreds af lukkestrukturen (7) og tætningselementet (12) af tætningssystemet (1), når tætningselementet (12) befinder sig i den tilbagetrukne position, har en stør- relse, som gør det muligt for tætningssystemet at passere gennem den ind- vendige flange (6) af den nedre sektion (2) under monteringen af tætningssy- stemet (1).The offshore wind turbine foundation according to claim 14, wherein the outer circumference of the closing structure (7) and the sealing element (12) of the sealing system (1), when the sealing element (12) is in the retracted position, have a size which allows the sealing system to pass through the inner flange (6) of the lower section (2) during the mounting of the sealing system (1). 16. Off-shore-vindturbinefundament ifølge krav 14 eller 15, hvor lukkestruktu- ren understøttes ved hjælp af en indvendig flange (5) af den øvre sektion (4) af støttestrukturen (3) for at forbinde den øvre sektion (4) med den nedre sek- tion (2) af støttestrukturen (3).An offshore wind turbine foundation according to claim 14 or 15, wherein the closure structure is supported by an inner flange (5) of the upper section (4) of the support structure (3) to connect the upper section (4) to the lower section (2) of the support structure (3). 17. Off-shore-vindturbinefundament ifølge et hvilket som helst af kravene 13 til 16, hvor den nedre sektion (2) af støttestrukturen (3) er en monopæl.An offshore wind turbine foundation according to any one of claims 13 to 16, wherein the lower section (2) of the support structure (3) is a monopile. 18. Off-shore-vindturbinefundament ifølge et hvilket som helst af kravene 13 til 17, hvor den øvre sektion (4) af støttestrukturen (3) er et overgangsstykke.An offshore wind turbine foundation according to any one of claims 13 to 17, wherein the upper section (4) of the support structure (3) is a transition piece.
DKPA201970784A 2019-12-18 2019-12-18 Sealing system for an offshore wind turbine and a wind turbine with such a sealing system DK180536B1 (en)

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