WO2003098034A1 - Wind turbine rotor construction - Google Patents
Wind turbine rotor construction Download PDFInfo
- Publication number
- WO2003098034A1 WO2003098034A1 PCT/DK2002/000327 DK0200327W WO03098034A1 WO 2003098034 A1 WO2003098034 A1 WO 2003098034A1 DK 0200327 W DK0200327 W DK 0200327W WO 03098034 A1 WO03098034 A1 WO 03098034A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- wind turbine
- turbine rotor
- accordance
- hub
- Prior art date
Links
- 238000010276 construction Methods 0.000 title claims abstract description 39
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 4
- 239000012530 fluid Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
- F05B2240/313—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape with adjustable flow intercepting area
-
- 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
Definitions
- the present invention relates to a wind turbine construction of the kind set forth in the preamble of claim 1.
- wind turbine rotor constructions of this kind it is known to provide the wind turbine rotor with a number of blades connected to a hub for rotation on a mainly horizontal rotation axis, and providing a pitch control of the blade by a suitable bearing construction positioned at the connection between the blades and the hub.
- a wind turbine rotor construction of this kind is known from US-5,660,527.
- Figure 2 schematically shows the increase in power generation as a function of the radial dimension r of the hub extension
- Figure 3 is a curve indicating the reduction in torque load on the bearing for the pitch control of the blade as a function of the radial position of said bearing.
- the wind turbine rotor construction shown in Figure 1 comprises a number of blades 1 (only one shown) connected to a hub 2 for rotation on a mainly horizontal rotation axis 3.
- a hub extension 5 is provided between the hub 2 and the blade 1 , thereby increasing the radial dimension R of the rotor construction and thus the area swept by the blade 1. This will increase the generated power approximately proportional to the increased swept area.
- a bearing construction 4 is positioned between the blade 1 and the hub 2 in order to be able to control the pitch of the blade 1 , said pitch control being used for controlling the turbine load by controlling the power output and the rotational speed of the wind turbine rotor.
- the position of the bearing 4 is differing from the traditional positioning inside the hub 2, said bearing 4 being positioned at a distance r from the rotational axis 3, and this extra distance is provided by means of a hub extension 5 being fixedly connected to the hub 2 and supporting the bearing construction 4 for mounting the blade 1.
- the hub extension 5 is an aerodynamically inactive part, i.e. the hub extension 5 does not contribute significantly to the power generation of the wind turbine rotor, but may be formed in an aerodynamically suitable way in order to reduce the windbreaking function of the hub extension 5.
- the curve shown in Figure 2 indicates the increase in power production as a function of the radial dimension r of the hub extension for a construction in which the radial dimension L of the blade is kept constant and the hub extension is varied.
- the curve is calculated for a radial dimension L of the blade 1 equal to 45 metres.
- the curve shown in Figure 3 indicates how the torque load on the bearing construction 4 is reduced, when the radial distance r is increased from being equal to the radius r 0 of the hub 2, and shows that a reduction of approximately 50% can be achieved with a radius r equal to approximately 5 metres for the construction for which these calculations have been made in this graphical illustration, namely a rotor radius R equal to 45 metres.
- the construction in accordance with Figure 1 comprises a pitch mechanism 6, 7 in the form of a hydraulic piston 6 driven by a hydraulic drive unit 7 mounted in the hub extension 5.
- the pitch control can be performed by means of other types of mechanical drive means, such as electrical drive, pneumatic drive, etc.
- the hub extension 5 is provided as a separate unit connected to the hub 2 by means of suitable connecting means 8 and connected to the blade 1 and the corresponding pitch bearing 4 by means of suitable connecting means 9.
- the hub extension 5 shown in Figure 1 contains the necessary pitch mechanism 6, 7 for controlling the pitch of the blade 1.
- the blade 1 for connecting to the hub extension 5 is preferably dimensioned in its aerodynamic profile in accordance with the increased radial position of the blade 1.
- the provision of the hub extension 5 and the blade 1 as separate elements makes the transport of these separate elements from the production site to the erection site easier due to the relative smaller dimensions r, L compared to the total dimension R of the rotor blade with similar radial dimension.
- the adapted aerodynamic profile of the blade 1 is slimmer than would be the case if the blade 1 extended all the way in direction of the hub 2.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002316786A AU2002316786A1 (en) | 2002-05-17 | 2002-05-17 | Wind turbine rotor construction |
PCT/DK2002/000327 WO2003098034A1 (en) | 2002-05-17 | 2002-05-17 | Wind turbine rotor construction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DK2002/000327 WO2003098034A1 (en) | 2002-05-17 | 2002-05-17 | Wind turbine rotor construction |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003098034A1 true WO2003098034A1 (en) | 2003-11-27 |
Family
ID=29433044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK2002/000327 WO2003098034A1 (en) | 2002-05-17 | 2002-05-17 | Wind turbine rotor construction |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2002316786A1 (en) |
WO (1) | WO2003098034A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010040829A2 (en) | 2008-10-10 | 2010-04-15 | Sway As | Wind turbine rotor and wind turbine |
EP2253837A1 (en) * | 2009-05-18 | 2010-11-24 | Lm Glasfiber A/S | Method of manufacturing a wind turbine blade having predesigned segment |
WO2011124707A2 (en) | 2010-04-09 | 2011-10-13 | Sway Turbine As | Wind turbine rotor and wind turbine |
DE202011103091U1 (en) | 2010-07-14 | 2011-11-24 | Envision Energy (Denmark) A.P.S. | hub extension |
WO2012113399A2 (en) | 2011-02-23 | 2012-08-30 | Envision Energy (Denmark) Aps | A wind turbine blade |
WO2013092852A1 (en) * | 2011-12-22 | 2013-06-27 | Lm Wind Power A/S | Wind turbine blade assembled from inboard and outboard blade parts |
US8888453B2 (en) | 2009-05-18 | 2014-11-18 | Lm Glasfiber A/S | Wind turbine blade provided with flow altering devices |
US8894374B2 (en) | 2009-05-18 | 2014-11-25 | Lm Glasfiber A/S | Wind turbine blade |
US8899922B2 (en) | 2009-05-18 | 2014-12-02 | Lm Glasfiber A/S | Wind turbine blade with base part having inherent non-ideal twist |
GB2517935A (en) * | 2013-09-05 | 2015-03-11 | Mainstream Renewable Power Ltd | Wind turbine blade extender |
US9057359B2 (en) | 2009-05-18 | 2015-06-16 | Lm Glasfiber A/S | Wind turbine blade with base part having non-positive camber |
GB2539237A (en) * | 2015-06-10 | 2016-12-14 | Statoil Asa | Rotor blade shaped to enhance wake diffusion |
WO2018007403A1 (en) * | 2016-07-05 | 2018-01-11 | Peter Lutz | Rotor blade and rotor for megawatt wind turbines |
US10502194B2 (en) | 2016-05-27 | 2019-12-10 | General Electric Company | Wind turbine bearings |
US10598159B2 (en) | 2016-05-06 | 2020-03-24 | General Electric Company | Wind turbine bearings |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2913407A1 (en) * | 1979-04-04 | 1980-10-16 | Goslich Hans Dietrich | Wind turbine with rotor blades of reduced length - has resilient couplings between all elements subjected to wind force |
NL8204927A (en) * | 1982-12-21 | 1984-07-16 | Holland Windturbine B V | Post-mounted wind turbine - drives electric generator via gearbox and flexible U-shaped bar |
DE4428731A1 (en) * | 1994-08-15 | 1996-02-22 | Infan Gmbh Ingenieurgesellscha | Variable length rotor blade for wind power systems |
US5876181A (en) * | 1994-06-27 | 1999-03-02 | Shin; Chan | Multi-unit rotor blade system integrated wind turbine |
WO2001055590A1 (en) * | 2000-01-26 | 2001-08-02 | Aloys Wobben | Wind power installation with two rotors in tandem |
-
2002
- 2002-05-17 AU AU2002316786A patent/AU2002316786A1/en not_active Abandoned
- 2002-05-17 WO PCT/DK2002/000327 patent/WO2003098034A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2913407A1 (en) * | 1979-04-04 | 1980-10-16 | Goslich Hans Dietrich | Wind turbine with rotor blades of reduced length - has resilient couplings between all elements subjected to wind force |
NL8204927A (en) * | 1982-12-21 | 1984-07-16 | Holland Windturbine B V | Post-mounted wind turbine - drives electric generator via gearbox and flexible U-shaped bar |
US5876181A (en) * | 1994-06-27 | 1999-03-02 | Shin; Chan | Multi-unit rotor blade system integrated wind turbine |
DE4428731A1 (en) * | 1994-08-15 | 1996-02-22 | Infan Gmbh Ingenieurgesellscha | Variable length rotor blade for wind power systems |
WO2001055590A1 (en) * | 2000-01-26 | 2001-08-02 | Aloys Wobben | Wind power installation with two rotors in tandem |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010040829A2 (en) | 2008-10-10 | 2010-04-15 | Sway As | Wind turbine rotor and wind turbine |
US8729721B2 (en) | 2008-10-10 | 2014-05-20 | Sway Turbine As | Wind turbine rotor and wind turbine |
US8899922B2 (en) | 2009-05-18 | 2014-12-02 | Lm Glasfiber A/S | Wind turbine blade with base part having inherent non-ideal twist |
EP2253837A1 (en) * | 2009-05-18 | 2010-11-24 | Lm Glasfiber A/S | Method of manufacturing a wind turbine blade having predesigned segment |
WO2010133587A1 (en) * | 2009-05-18 | 2010-11-25 | Lm Glasfiber A/S | Method of manufacturing a wind turbine blade having predesigned segment |
CN102459879A (en) * | 2009-05-18 | 2012-05-16 | Lm玻璃纤维制品有限公司 | Method of manufacturing a wind turbine blade having predesigned segment |
US9057359B2 (en) | 2009-05-18 | 2015-06-16 | Lm Glasfiber A/S | Wind turbine blade with base part having non-positive camber |
US9033659B2 (en) | 2009-05-18 | 2015-05-19 | Lm Glasfiber A/S | Method of manufacturing a wind turbine blade having predesigned segment |
US8888453B2 (en) | 2009-05-18 | 2014-11-18 | Lm Glasfiber A/S | Wind turbine blade provided with flow altering devices |
US8894374B2 (en) | 2009-05-18 | 2014-11-25 | Lm Glasfiber A/S | Wind turbine blade |
WO2011124707A2 (en) | 2010-04-09 | 2011-10-13 | Sway Turbine As | Wind turbine rotor and wind turbine |
DE202011103091U1 (en) | 2010-07-14 | 2011-11-24 | Envision Energy (Denmark) A.P.S. | hub extension |
WO2012113399A2 (en) | 2011-02-23 | 2012-08-30 | Envision Energy (Denmark) Aps | A wind turbine blade |
WO2012113399A3 (en) * | 2011-02-23 | 2013-02-07 | Envision Energy (Denmark) Aps | A wind turbine blade |
WO2013092852A1 (en) * | 2011-12-22 | 2013-06-27 | Lm Wind Power A/S | Wind turbine blade assembled from inboard and outboard blade parts |
GB2517935A (en) * | 2013-09-05 | 2015-03-11 | Mainstream Renewable Power Ltd | Wind turbine blade extender |
GB2539237A (en) * | 2015-06-10 | 2016-12-14 | Statoil Asa | Rotor blade shaped to enhance wake diffusion |
WO2016200277A1 (en) | 2015-06-10 | 2016-12-15 | Statoil Asa | Rotor blade shaped to enhance wake diffusion |
EP3308014A4 (en) * | 2015-06-10 | 2019-02-13 | Equinor ASA | Rotor blade shaped to enhance wake diffusion |
GB2539237B (en) * | 2015-06-10 | 2020-12-09 | Equinor Asa | Rotor blade shaped to enhance wake diffusion |
US10975837B2 (en) | 2015-06-10 | 2021-04-13 | Equinor Asa | Rotor blade shaped to enhance wake diffusion |
US10598159B2 (en) | 2016-05-06 | 2020-03-24 | General Electric Company | Wind turbine bearings |
US10502194B2 (en) | 2016-05-27 | 2019-12-10 | General Electric Company | Wind turbine bearings |
WO2018007403A1 (en) * | 2016-07-05 | 2018-01-11 | Peter Lutz | Rotor blade and rotor for megawatt wind turbines |
Also Published As
Publication number | Publication date |
---|---|
AU2002316786A1 (en) | 2003-12-02 |
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