This application is the National Stage of PCT/AT2019/060425 filed on Dec. 9, 2019 which claims priority under 35 U.S.C. § 119 of Austrian Application No. A 51113/2018 filed on Dec. 13, 2018, the disclosure of which is incorporated by reference. The international application under PCT article 21(2) was not published in English.
The invention relates to a nacelle for a wind turbine as well as to a wind turbine equipped with a nacelle.
From EP2863076A1, a rotor bearing for a nacelle of a wind turbine is known. The rotor bearing known from EP2863076A1 has only a low energy efficiency.
It was the object of the present invention to overcome the disadvantages of the prior art and to provide a nacelle for a wind turbine with improved energy efficiency.
This object is achieved by means of a nacelle and a wind turbine according to the claims.
According to the invention, a nacelle for a wind turbine is provided. The nacelle comprises:
The nacelle according to the invention has the advantage that, by means of the sealing element, an improved sealing of the nacelle can be achieved, which in particular makes the use of hydrodynamic sliding bearings for the application in the rotor bearing possible.
Moreover, it may be useful if the sealing element is designed as an axial seal, which is arranged between a front side of the nacelle housing and a front side of the rotor hub.
In an alternative, it may be provided that the sealing element is designed as a radial seal, which is arranged between the nacelle housing and the rotor hub and/or between the nacelle housing and the rotor shaft.
In addition to this, it may be provided that the sealing element is designed as a mechanical end-face seal. Particularly by means of a mechanical end-face seal, a good sealing effect for sealing the nacelle can be achieved.
A design according to which it may be provided that the sealing element comprises at least two segments, which can be put over the rotor shaft in the radial direction, is also advantageous. This entails the advantage that the sealing element can be replaced easily without having to remove the rotor shaft. This facilitation of the maintenance of the rotor shaft can be achieved in particular by the sealing element not being closed entirely but rather having a segmented design and thus being able to be opened to allow putting it radially over the shaft.
According to an advancement, it is possible that the sealing element is designed as a labyrinth seal. A labyrinth seal, in particular, can have a long lifespan in the present case of application and have a sufficient sealing effect particularly when the sealing element is not immersed in the lubricating oil sump.
Furthermore, it may be useful if the labyrinth seal has a return line, which leads into the lubricating oil sump. By this measure, an undesired lubricant leakage out of the nacelle can be mostly avoided. The return line may, for example, be realized in the form of a bore, which leads from a dip of the sealing labyrinth in the direction of the lubricating oil sump. However, the return line may also be formed by an inner wall at the labyrinth located closer to the lubricating oil sump being lower than an outer wall at the labyrinth located further away from the lubricating oil sump.
In addition to this, it may be provided that the sealing element is accommodated in the nacelle housing, and the rotor hub is rotatable relative to the sealing element. Particularly a seal formed in such a way and/or an installation situation of the seal formed in such a way leads to the lowest possible wear of the sealing element. Hence, the durability of the sealing element can be increased.
Moreover, it may be provided that the sealing element contacts a sealing surface, which is movable relative to the sealing element, wherein the sealing surface has a sliding lacquer coating. Particularly in such a design of the sealing element, the durability of the wind turbine can be increased.
According to a particular design, it is possible that a sliding sleeve is arranged on the rotor hub or on the rotor shaft, which sliding sleeve cooperates with the sealing element. Particularly when using a sliding sleeve, the durability of the sealing element can be increased.
According to an advantageous advancement, it may be provided that an oil drip element in the form of a plunge-cut groove or of an elevation. By these measures, it can be achieved that the sealing effect of the sealing element can be improved.
In particular, it may be advantageous if two sealing elements are formed so as to be axially spaced apart from each other. Hence, the lubricating oil sump can be sealed on both sides, when viewed in the axial direction of the axis of rotation, in order to prevent a leakage of lubricating oil out of the nacelle on one side, and to bind the lubricating oil in the nacelle housing in the region of the lubricating oil sump on the second side.
Furthermore, it may be provided that a sealing element is formed between the nacelle housing and the rotor hub and/or between the nacelle housing and a rotor shaft.
Preferably, the sealing surface comprises a material that is selected from a group comprising aluminum base alloys, bismuth base alloys, silver base alloys, anti-friction varnishes. Particularly these wear resistant and tribologically particularly effective materials have proven particularly advantageous in wind turbines with a high power density. Surprisingly, anti-friction varnishes in particular can be used well as a sliding layer although they have a Vickers hardness of about 25 HV (0.001) to 60 HV (0.001), meaning they are significantly softer than previously described sliding layers, wherein here, increasing the hardness by adding corresponding hard particles is possible.
Moreover, it is possible that a polymer-based running-in layer is arranged on the sealing surface, in order to thereby achieve a better adaptability of the sealing surface to the sealing element during the running-in of the sealing element.
The materials used as anti-friction varnishes may, for example be polytetrafluoroethylene, resins containing fluorine such as perfluoroalkoxy copolymers, polyfluoroalkoxy-polytetrafluoroethylene copolymers, ethylene tetrafluoroethylene, polychlorotrifluoroethylene, fluorous ethylene-propylene copolymers, polyvinyl fluoride, polyvinylidene fluoride, alternating copolymers, static copolymers such as fluorinated ethylene propylene, polyesterimides, bis-maleimides, polyimide resins such as carborane imides, aromatic polyimide resins, hydrogen-free polyimide resins, polytriazo-pyromellithimides, polyamideimides, in particular aromatic ones, polyaryletherimides, possibly modified with isocyanates, polyetherimides, possible modified with isocyanates, epoxy resins, epoxy resin esters, phenolic resins, polyamide 6, polyamide 66, polyoxymethylene, silicones, polyaryl ethers, polyaryl ketones, polyaryletherketones, polyarylether-etherketones, polyetheretherketones, polyether ketones, polyvinylidene difluorides, polyethylensulfides, allylene sulfides, polytriazo-pyromellithimides, polyesterimides, polyarylsulfides, polyvinylenesulfides, polyphenylene sulfide, polysulfones, polyethersulfones, polyarylsulfones, polyaryloxides, polyarylsufides as well as copolymers thereof.
A pressure-increasing device within the meaning of this document is a device, which is configured to increase the pressure of the lubricating oil by means of external energy input. Such a pressure-increasing device is, for example, a hydraulic pump.
In addition to a nacelle housing, a nacelle within the meaning of this document also comprises a rotor hub and a rotor bearing for bearing the rotor hub.
The inner ring element and/or the outer ring element can each be formed as independent components, which may be coupled with the rotor hub or rotor shaft and/or with the nacelle housing. In the alternative to this, it is also conceivable that the inner ring element is formed as an integral element of the rotor hub and/or the rotor shaft. In the alternative to this, it is also conceivable that the outer ring element is formed as an integral element of the rotor hub and/or the rotor shaft. In the alternative to this, it is also conceivable that the inner ring element is formed as an integral element of the nacelle housing. In the alternative to this, it is also conceivable that the outer ring element is formed as an integral element of the nacelle housing.
For the purpose of better understanding of the invention, it will be elucidated in more detail by means of the figures below.
These show in a respectively very simplified schematic representation:
First of all, it is to be noted that in the different embodiments described, equal parts are provided with equal reference numbers and/or equal component designations, where the disclosures contained in the entire description may be analogously transferred to equal parts with equal reference numbers and/or equal component designations. Moreover, the specifications of location, such as at the top, at the bottom, at the side, chosen in the description refer to the directly described and depicted figure and in case of a change of position, these specifications of location are to be analogously transferred to the new position.
Moreover, a rotor 5 is formed, which has a rotor hub 6 with rotor blades 7 arranged thereon. The rotor hub 6 is considered part of the nacelle 2. The rotor hub 6 is received so as to be rotatable on the nacelle housing 4 by means of a rotor bearing 8.
The rotor bearing 8, which serves for bearing the rotor hub 6 on the nacelle housing 4 of the nacelle 2, is configured for absorbing a radial force 9, an axial force 10 and a tilting torque 11. The axial force 10 is caused by the force of the wind. The radial force 9 is caused by the weight force of the rotor 5 and is effective at the center of gravity of the rotor 5. As the center of gravity of the rotor 5 is outside the rotor bearing 8, the tilting torque 11 is generated in the rotor bearing 8 by the radial force 9. The tilting torque 11 may also be caused by an uneven load of the rotor blades 7.
The rotor bearing 8 according to the invention can have a diameter of 0.5 m to 5 m, for example. Of course, it is also conceivable that the rotor bearing 8 is smaller or larger.
As can be seen from
In a further exemplary embodiment that is not depicted, it may of course also be provided that the inner ring element 12 is received directly on the rotor hub 6.
In yet another exemplary embodiment that is not depicted, it may of course also be provided that the inner ring element 12 is fastened to the nacelle housing 4, and that the rotor hub 6 is coupled with the outer ring element 13.
As can be seen from
As can also be seen from
In an exemplary embodiment that is not depicted, it is of course also conceivable that the inner ring element 12 does not form a groove as shown in the exemplary embodiment of
Both in a design with an inner ring element 12 partible in the axial extension and in a design with an outer ring element 13 partible in the axial extension, it may be provided that the individual parts of the respective partibly designed ring element 12, 13 are formed so as to be axially adjustable relative to one another, in order to be able to compensate for example the wear of the sliding bearing elements 14. In particular, it may be provided that due to the axial adjustability of the individual parts of the ring elements 12, 13 relative to one another, the bearing gap can be adjusted.
As can further be seen from
The sliding bearing elements 14 are designed as hydrodynamic sliding bearings, whereby a lubricating oil film forms on the sliding surface 17 when the rotor hub 6 rotates about a rotor axis 21, which lubricating oil film serves the hydrodynamic bearing of the sliding bearing element 14.
For introducing lubricating oil 19 to the sliding surface 17, it may be provided that lubricating oil bores 22 are formed in the inner ring element 12 and/or in the outer ring element 13, which lubricating oil bores 22, depending on the rotation position of the rotor hub 6, open into the lubricating oil sump 18 at a first longitudinal end and end into an intermediate space between the inner ring element 12 and the outer ring element 13 at their second longitudinal end. By this measure, it can be achieved that sufficient lubricating oil 19 can be introduced to the sliding bearing element 14.
Moreover, it is also possible for lubricating oil bores 23 to be provided which open directly into the sliding surface 17. By means of these lubricating oil bores 23, the sliding surface 17 can be fluidically connected directly to the lubricating oil sump 18, so that sufficient lubricating oil 19 can be introduced to the sliding surface 17. In particular, it may be provided that due to the movement of the sliding bearing element 14 relative to the outer ring element 13, lubricating oil 19 is sucked into the sliding surface 17 via the lubricating oil bore 23 and/or the lubricating oil bore 22 and there, a lubricating oil film for the lubrication and/or bearing of the sliding bearing element 14 is formed. In order to achieve a good lubricating effect of the sliding bearing element 14, it may be provided that, as shown in
Moreover, it may be provided that a sealing element 24 is formed, which serves to seal the rotor hub 6 from the nacelle housing 4. As can be seen from
As can further be seen from
As can be seen from
Moreover, it is provided that a flow channel width 29 is selected such that it is smaller than a width 30 of the sliding bearing element 14. As can be seen from
In a first exemplary embodiment, it may be provided that the flow channel 27 on both sides in the circumferential direction tapers off in the shape of a wedge gap 31.
In a further exemplary embodiment, it may be provided that, viewed in the main direction of rotation 32, the wedge gap 31 is formed only at the end of the flow channel 27.
As can further be seen from
As can be seen from
As can be seen from
Moreover, it may be provided that the sealing elements 24 cooperate with the rotor shaft 15. In particular, it may be provided here that the sliding surface 17 is formed on the rotor shaft 15. In particular, it may be provided that for this purpose, the rotor shaft 15 locally has a particularly formed surface, which is formed for example by a sliding lacquer coating. Such a sliding lacquer coating may particularly be provided when using mechanical seals.
Moreover, it may be provided that an oil drip element 38 is formed on the rotor shaft 15, which oil drip element 38 serves to prevent lubricating oil 19 from reaching the sealing element 24 along the rotor shaft 15 in the axial direction. The oil drip element 38 may for example be designed in the form of a plunge-cut groove. In an alternative embodiment variant, it may also be provided that the oil drip element 38 is designed, for example, in the form of a circumferential elevation on the rotor shaft 15.
In a further exemplary embodiment that is not depicted, it may also be provided that the sliding sleeve 39 is received directly on the rotor hub 6, and the sealing element 24 thus serves to seal the rotor hub 6.
The exemplary embodiments show possible embodiment variants, and it should be noted in this respect that the invention is not restricted to these particular illustrated embodiment variants of it, but that rather also various combinations of the individual embodiment variants are possible and that this possibility of variation owing to the teaching for technical action provided by the present invention lies within the ability of the person skilled in the art in this technical field.
The scope of protection is determined by the claims. However, the description and the drawings are to be adduced for construing the claims. Individual features or feature combinations from the different exemplary embodiments shown and described may represent independent inventive solutions. The object underlying the independent inventive solutions may be gathered from the description.
All indications regarding ranges of values in the present description are to be understood such that these also comprise random and all partial ranges from it, for example, the indication 1 to 10 is to be understood such that it comprises all partial ranges based on the lower limit 1 and the upper limit 10, i.e. all partial ranges start with a lower limit of 1 or larger and end with an upper limit of 10 or less, for example 1 through 1.7, or 3.2 through 8.1, or 5.5 through 10.
Finally, as a matter of form, it should be noted that for ease of understanding of the structure, elements are partially not depicted to scale and/or are enlarged and/or are reduced in size.
Number | Date | Country | Kind |
---|---|---|---|
A 51113/2018 | Dec 2018 | AT | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/AT2019/060425 | 12/9/2019 | WO |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2020/118333 | 6/18/2020 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
3203260 | Pierry et al. | Aug 1965 | A |
6637942 | Dourlens et al. | Oct 2003 | B2 |
6866423 | Faltus et al. | Mar 2005 | B2 |
7255537 | Flamang et al. | Aug 2007 | B2 |
7794151 | Neumann | Sep 2010 | B2 |
7832980 | Demtroder et al. | Nov 2010 | B2 |
8545186 | Loeschner et al. | Oct 2013 | B2 |
8591371 | Dinter et al. | Nov 2013 | B2 |
8840521 | Kari et al. | Sep 2014 | B2 |
8974120 | Pedersen et al. | Mar 2015 | B2 |
9057365 | Han et al. | Jun 2015 | B2 |
9206787 | Winkelmann | Dec 2015 | B2 |
9279413 | Ebbesen et al. | Mar 2016 | B2 |
9297454 | Barthel et al. | Mar 2016 | B2 |
9435376 | Gaertner et al. | Sep 2016 | B2 |
9458880 | Kari et al. | Oct 2016 | B2 |
9657716 | Vervoorn et al. | May 2017 | B2 |
9677606 | Pischel | Jun 2017 | B2 |
9683602 | Hager et al. | Jun 2017 | B2 |
9784245 | Hager et al. | Oct 2017 | B2 |
9845826 | Sutton et al. | Dec 2017 | B2 |
9869349 | Rittmann et al. | Jan 2018 | B2 |
9995283 | Stiesdal | Jun 2018 | B2 |
10072704 | Sato | Sep 2018 | B2 |
10288164 | Hoelzl | May 2019 | B2 |
10436249 | Hoelzl | Oct 2019 | B2 |
10451176 | Hoelzl | Oct 2019 | B2 |
10502259 | Meyer | Dec 2019 | B2 |
10598214 | Hoelzl | Mar 2020 | B2 |
10612586 | Frydendal et al. | Apr 2020 | B2 |
10724624 | Tulokas | Jul 2020 | B2 |
11009077 | Hofmann | May 2021 | B2 |
11280320 | Claramunt Estecha et al. | Mar 2022 | B2 |
11384728 | Elmose | Jul 2022 | B2 |
11988196 | Sasakawa | May 2024 | B2 |
20020114549 | Hokkirigawa et al. | Aug 2002 | A1 |
20030063821 | Dourlens et al. | Apr 2003 | A1 |
20050129341 | Hoppe | Jun 2005 | A1 |
20100111459 | Yasuda | May 2010 | A1 |
20110254281 | Noda et al. | Oct 2011 | A1 |
20130071246 | Kari et al. | Mar 2013 | A1 |
20130172144 | Suzuki et al. | Jul 2013 | A1 |
20140161614 | Vervoorn et al. | Jun 2014 | A1 |
20140169952 | Pedersen et al. | Jun 2014 | A1 |
20140193262 | Pedersen et al. | Jul 2014 | A1 |
20140193264 | Pedersen et al. | Jul 2014 | A1 |
20140377063 | Guerenbourg et al. | Dec 2014 | A1 |
20150017000 | Sato et al. | Jan 2015 | A1 |
20150055899 | Kodama et al. | Feb 2015 | A1 |
20150159693 | Corts | Jun 2015 | A1 |
20150204383 | Ishii et al. | Jul 2015 | A1 |
20150330498 | Carlino et al. | Nov 2015 | A1 |
20150369284 | Hager et al. | Dec 2015 | A1 |
20160076522 | Rohden | Mar 2016 | A1 |
20160327148 | Dinter | Nov 2016 | A1 |
20180187719 | Tulokas | Jul 2018 | A1 |
20200158090 | Hager et al. | May 2020 | A1 |
20200173425 | Schroeder | Jun 2020 | A1 |
20210102528 | Christoffersen | Apr 2021 | A1 |
Number | Date | Country |
---|---|---|
509 625 | Oct 2011 | AT |
516029 | Feb 2016 | AT |
519288 | May 2018 | AT |
15975 | Oct 2018 | AT |
650057 | Mar 1992 | AU |
2008331343 | Feb 2010 | AU |
101438068 | May 2009 | CN |
101965455 | Feb 2011 | CN |
102009663 | Apr 2011 | CN |
202082374 | Dec 2011 | CN |
102345676 | Feb 2012 | CN |
102418833 | Apr 2012 | CN |
102713276 | Oct 2012 | CN |
202811230 | Mar 2013 | CN |
103557124 | Feb 2014 | CN |
103765005 | Apr 2014 | CN |
104234949 | Dec 2014 | CN |
104819209 | Aug 2015 | CN |
104956101 | Sep 2015 | CN |
204627877 | Sep 2015 | CN |
106062391 | Oct 2016 | CN |
106164509 | Nov 2016 | CN |
106884972 | Jun 2017 | CN |
108026975 | May 2018 | CN |
108167442 | Jun 2018 | CN |
108884863 | Nov 2018 | CN |
37 02 008 | Aug 1988 | DE |
3726751 | Feb 1989 | DE |
10064261 | Jul 2002 | DE |
10 2005 001 344 | Jul 2006 | DE |
10 2005 018 836 | Dec 2006 | DE |
60219261 | Jan 2008 | DE |
10 2011 010 204 | Aug 2012 | DE |
10 2011 119 471 | May 2013 | DE |
10 2012 212 792 | Jan 2014 | DE |
10 2013 211 710 | Oct 2014 | DE |
10 2014 205 637 | Oct 2015 | DE |
102015201356 | Jul 2016 | DE |
11 2013 003 034 | Aug 2017 | DE |
201670106 | Sep 2017 | DK |
1 564 406 | Aug 2005 | EP |
1 564 406 | Aug 2005 | EP |
2 003 334 | Dec 2008 | EP |
2 136 093 | Dec 2009 | EP |
2290269 | Mar 2011 | EP |
2 383 480 | Oct 2012 | EP |
2 568 163 | Mar 2013 | EP |
2 597 307 | May 2013 | EP |
2 600 037 | Jun 2013 | EP |
2620643 | Jul 2013 | EP |
2 657 519 | Oct 2013 | EP |
2 679 492 | Jan 2014 | EP |
2 711 568 | Mar 2014 | EP |
2816226 | Dec 2014 | EP |
2 863 076 | Apr 2015 | EP |
2 955 413 | Dec 2015 | EP |
3 012 479 | Apr 2016 | EP |
3 040 553 | Jul 2016 | EP |
3091242 | Nov 2016 | EP |
3 139 034 | Mar 2017 | EP |
3 173 642 | May 2017 | EP |
3 252 306 | Jun 2017 | EP |
3 279 471 | Feb 2018 | EP |
3 343 071 | Jul 2018 | EP |
3 396 187 | Oct 2018 | EP |
1405118 | Sep 1975 | GB |
2 201 200 | Aug 1990 | GB |
S59-54812 | Mar 1984 | JP |
H04-203566 | Jul 1992 | JP |
H07-3248 | Jan 1995 | JP |
H07-293556 | Nov 1995 | JP |
H11-303857 | Nov 1999 | JP |
2002-195261 | Jul 2002 | JP |
2003176822 | Jun 2003 | JP |
2003194071 | Jul 2003 | JP |
2006-118552 | May 2006 | JP |
2010-101263 | May 2010 | JP |
2010151207 | Jul 2010 | JP |
2014-159861 | Sep 2014 | JP |
2015-001279 | Jan 2015 | JP |
2015140768 | Aug 2015 | JP |
2017-048849 | Mar 2017 | JP |
2014-0143620 | Dec 2014 | KR |
2007071239 | Jun 2007 | WO |
2008152083 | Dec 2008 | WO |
2011127509 | Oct 2011 | WO |
2011127510 | Oct 2011 | WO |
2012103913 | Aug 2012 | WO |
2013191163 | Dec 2013 | WO |
2014005587 | Jan 2014 | WO |
WO-2014109043 | Jul 2014 | WO |
2014117196 | Aug 2014 | WO |
2014173808 | Oct 2014 | WO |
2017144058 | Aug 2017 | WO |
2018071941 | Apr 2018 | WO |
Entry |
---|
International Search Report in PCT/AT2019/060420, mailed Mar. 5, 2020. |
International Search Report in PCT/AT2019/060424, mailed Apr. 3, 2020. |
International Search Report in PCT/AT2019/060425, mailed Apr. 14, 2020. |
International Search Report in PCT/AT2019/060421, mailed Apr. 3, 2020. |
International Search Report in PCT/AT2019/060426, mailed Apr. 7, 2020. |
International Search Report in PCT/AT2019/060419, mailed Mar. 26, 2020. |
Li Yunlong, Discussion on Localization of Composite Material Sliding Bearing in Hydropower Projects, Hongshui River, vol. 35, Issue 2, 4 pages, with English Abstract at the end of the document, Apr. 2016. |
Number | Date | Country | |
---|---|---|---|
20220010784 A1 | Jan 2022 | US |