WO2010048959A2 - Aérogénérateur comprenant un support de pale étendu - Google Patents

Aérogénérateur comprenant un support de pale étendu Download PDF

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Publication number
WO2010048959A2
WO2010048959A2 PCT/DK2009/050280 DK2009050280W WO2010048959A2 WO 2010048959 A2 WO2010048959 A2 WO 2010048959A2 DK 2009050280 W DK2009050280 W DK 2009050280W WO 2010048959 A2 WO2010048959 A2 WO 2010048959A2
Authority
WO
WIPO (PCT)
Prior art keywords
support
radially extending
hub
rotor blade
peripheral
Prior art date
Application number
PCT/DK2009/050280
Other languages
English (en)
Other versions
WO2010048959A3 (fr
Inventor
Erik Sloth
Original Assignee
Vestas Wind Systems A/S
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 Vestas Wind Systems A/S filed Critical Vestas Wind Systems A/S
Publication of WO2010048959A2 publication Critical patent/WO2010048959A2/fr
Publication of WO2010048959A3 publication Critical patent/WO2010048959A3/fr

Links

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
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
    • 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
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/79—Bearing, support or actuation arrangements therefor
    • 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 wind turbine generator with a hub structure that provides extended rotor blades support.
  • the invention also relates to the hub structure, and to a corresponding method for operating a wind turbine generator.
  • a wind turbine generator (WTG) or wind turbine has one or more rotor blades which are rotatable around a horizontal axis mounted in a nacelle.
  • the nacelle is pivotable around a vertical axis in order to turn the rotor blade to a position which is aligned with the wind direction.
  • the one or more rotor blades is rotated at a speed which is depending on the wind and the aerodynamics of the rotor blades in order to drive a generator for converting wind energy into electric energy.
  • the typically three rotor blades are connected with a hub, which is in turn mechanically connected with a rotating shaft.
  • the hub is accordingly a critical mechanical part of a modern wind turbine generator.
  • the hub should be able to withstand a large mechanical load arising from the rotor blades, and on the other hand the hub, as a rotating part, should have a relatively low weight in order not to give rise to losses in the wind turbine generator. Moreover, the hub should preferably have a beneficial aero dynamical design in order not to increase air resistance and/or create noise upon rotation.
  • US patent application 2006/0104820 discloses the hub for the rotor of a wind energy turbine which comprises a hollow body rotatable around a rotation axis and provided with at least one flange for mounting to the hollow body, a bearing for a rotor blade and two or more stiffening webs.
  • the webs are integrally formed with the hollow body and radially extending within a flange area of the hollow body surrounded by the flange to the center of the flange area, wherein at least two openings are provided within the flange area of the hollow body.
  • This reinforced hub has a relatively low weight and is also sufficiently stiff to withstand forces acting on the rotor blades and forces resulting from the loads.
  • This hub also has a relatively complicated design which may significantly increase manufacturing time and/or cost. Furthermore, transportation of hubs of this size can be a problem. With the increasing size of rotor blades in wind turbine generators, and the corresponding loads from and on the rotor blades, rotor blade resonances, both in-plane and out-of-plane, can further severely impact life time and durability of the wind turbine generator.
  • an improved wind turbine generator would be advantageous, and in particular a more efficient and/or reliable wind turbine generator would be advantageous.
  • a wind turbine generator comprising: a plurality of rotor blades, a rotation shaft, and - a hub for connecting the plurality of rotor blades with the rotation shaft, wherein the hub further comprises
  • each support structure comprising at least a first blade support point for receiving and supporting a rotor blade
  • each inclined support beam for each rotor blade, the first end portion of each inclined support beam being connected to the corresponding radially extending support structure, the second end portion of each inclined support beam of the plurality of inclined support beams being collected in a common, connecting point in an exterior position on the hub, and/or - at least a first peripheral support rod positioned in an exterior position on the hub, said first peripheral support rod connecting two of said radially extending support structures.
  • inclined support beams, and/or the first peripheral support rod have an airfoil shape providing aerodynamic lift upon wind engagement.
  • the invention is particularly, but not exclusively, advantageous for obtaining a wind turbine generator where the resonances of the rotor blades are controlled, i.e. shifted and/or reduced, by designing and dimensioning the plurality of inclined support beams and/or the first peripheral support rod accordingly.
  • the volume of the hub is utilized for increasing the aerodynamic lift while still facilitating a relatively strong structure of the hub.
  • the connecting hub due to its pyramid-like structure, may be transported in smaller parts, e.g. the radially extending structure, the support beams, and/or the peripheral support rods may be transported and assembled on or near the site of the wind turbine generator.
  • This may also facilitate even larger wind turbine generators to be manufactured, transported and assembled because currently wind turbine generators have reached a size where limitations imposed by the transportation, both in terms of cost and physical limitations (e.g. width of roads and/or trucks), have reached a relatively high level.
  • the mechanical properties of the present invention may be very attractive, even though the assembly of the hub near or on the site of the wind turbine generator may slightly complicate the final stage of the wind turbine generator assembly. It is however also envisioned that all, or alternatively, most of the various parts of the hub of the present invention may be assembled already during manufacturing.
  • an airfoil shape (or aerofoil shape) locally defines a structure which, upon wind engagement, provides a significant lift.
  • the cross-sectional shape may be symmetric or anti-symmetric, but preferably an anti-symmetric cross-sectional shape may be chosen.
  • the aspect ratio of the cross-sectional shape i.e., the chord length to maximum thickness, is preferably in the interval from 2 to 10, more preferably in the interval from 4 to 8.
  • the minimum aspect ratio is at least 2, 3, 4, 5, 6, 7, 8, 9, or 10.
  • the lift coefficient (C L ) may be at least 0.5, at least 0.7, at least 0.9, or at least 1.1 of any of the airfoil shaped hub parts according to the present invention.
  • the inclined support beams and/or peripheral support rods may in principle have any appropriate shape (longitudinal and cross-sectional) suitable for fulfilling their purpose of supporting the rotor blade and providing aerodynamic lift upon wind engagement.
  • the support beam need not be limited to having a substantially straight shape in the longitudinal direction, but could have various curved or bent shapes.
  • the peripheral support rods could in particular have a curved shape in the longitudinal direction.
  • the shape of the two intermediate peripheral support rods could be half-arcs connecting each rotor blade.
  • the generator may be a variable-speed wind turbine generator that provides several known advantages.
  • the airfoil shape of the inclined support beams, and/or the first peripheral support rod may cover at least 4%, preferably at least 8%, or more preferably at least 12%, of the projected circular area covered by the hub as defined by an outer end part of the plurality of radially extending support structures.
  • the generator may further comprise a shaft having a substantially central position in the hub, the shaft extending substantially along the rotation shaft for supporting the plurality of inclined support beams in the common, connecting point. This may advantageously support the common connection point for the inclined beams.
  • the generator may preferably comprise a second peripheral support rod positioned in an exterior position on the hub, said second support rod connecting two of said radially extending support structures similarly to the first support rod.
  • the generator may preferably comprise a second peripheral support rod positioned in an exterior position on the hub, said second support rod connecting two of said radially extending support structures similarly to the first support rod.
  • all rotor blades are inter-connected with support rods, but it could be sufficient for some wind turbines to just have two support rods to obtain e.g. blade edge vibration frequency shifting.
  • each peripheral support rod directly connects two radially extending support structures, whereby the said support rod together with the two connected radially extending support structures have a substantially triangular shape.
  • each radially extending support structure may comprise a first and a second rotor blade support point for receiving and supporting a rotor blade, said first and second rotor blade support points being located at radially different positions relative to the rotation shaft.
  • the said first and the said second rotor blade support points may be located opposite each other in separate radial half parts of the radially extending support structure.
  • the said first and the said second rotor blade support points may be located with a radial distance being at least 5%, 10% or 15% of the total rotor blade length as measured from the rotational shaft.
  • each radially extending support structure may have a radial extension of at least 10%, preferably at least 15%, or more preferably at least 20%, of the total rotor blade length as measured from the rotational shaft.
  • the longer radial support structure the less amplitude there will be on the edge and/or the flap vibration of the blades.
  • each radially extending support structure may comprise a hollow portion for receiving a corresponding end portion of the rotor blade.
  • the rotor blades may be pitchably mounted, for example in the first and the second support point in a type of pitch bearing.
  • the radially extending support structures may also have an airfoil shape providing aerodynamic lift upon wind engagement. Even further, these structures may be arranged in order for these shapes to be pitchable, though sufficient support should also be provided to the rotor blades.
  • the airfoil shape of the inclined support beams, and/or the first and/or the second peripheral support rod(s) may be pitchably mounted in order to optimize the wind lift by changing the angle of attack for each element.
  • each rotor blade in the plurality of rotor blades may be adapted to be temporally fixated to the corresponding radially extending support structure in a manner different from the normal mounting, for instance to allow for exchange of the first and/or the second rotor blade support point in the radially extending support structure, thereby enabling repair of bearings to be performed while the blade is for example clamped to the hub without use of the bearings used during normal operation.
  • the present invention relates to a hub for use in a wind turbine generator comprising a plurality of rotor blades and a rotation shaft, the hub being arranged for connecting the plurality of rotor blades with the rotation shaft, wherein the hub comprises:
  • each support structure comprising at least a first blade support point for receiving and supporting a rotor blade, and a plurality of inclined support beams, one inclined support beam for each rotor blade, the first end portion of each inclined support beam being connected to the corresponding radially extending support structure, the second end portion of each inclined support beam of the plurality of inclined support beams being collected in a common, connecting point in an exterior position on the hub, and/or at least a first peripheral support rod positioned in an exterior position on the hub, said first peripheral support rod connecting two of said radially extending support structures, wherein the inclined support beams, and/or the first peripheral support rod have an airfoil shape providing aerodynamic lift upon wind engagement.
  • the invention further relates to a method being adapted to enable operation of a wind turbine generator according to a first aspect of the invention.
  • the method comprises: - providing a plurality of rotor blades, providing a rotation shaft, and providing a hub for connecting the plurality of rotor blades with the rotation shaft, wherein the hub further comprises - a plurality of radially extending support structures, one radially extending support structure for each rotor blade, each support structure comprising at least a first blade support point for receiving and supporting a rotor blade, and a plurality of inclined support beams, one inclined support beam for each rotor blade, the first end portion of each inclined support beam being connected to the corresponding radially extending support structure, the second end portion of each inclined support beam of the plurality of inclined support beams being collected in a common, connecting point in an exterior position on the hub, and/or at least a first peripheral support rod positioned in an exterior position on the hub, said first peripheral support rod connecting two of said radially
  • This aspect of the invention is particularly, but not exclusively, advantageous in that the method according to the present invention may be implemented near or on the site of assembly of the wind turbine generator providing easier transportation of at least the hub of the wind turbine generator.
  • the first, second and third aspect of the present invention may each be combined with any of the other aspects.
  • Figure 1 is a perspective drawing of a wind turbine generator according to the present invention
  • Figure 2 is a side view drawing of a wind turbine generator according to the present invention
  • Figure 3 is schematic drawing of selected part of a hub for a wind turbine generator according to the present invention
  • Figure 4 is a schematic drawing of a peripheral support rod configuration according to the present invention.
  • Figures 5 and 6 are schematic perspective drawings of three connected radially extending support structures according to the present invention.
  • Figure 7 is a schematic plan view of three connected radially extending support structures with radial support points according to the present invention.
  • Figure 8 is a schematic perspective drawing of three connected radially extending support structures with airfoil shape according to the present invention.
  • Figure 9 is a schematic plan view of three connected radially extending support structures with temporary fixation points according to the present invention.
  • FIG 1 is a perspective drawing of a wind turbine generator 1 according to the present invention, the tower being omitted for clarity.
  • the wind turbine generator 1 comprises a plurality of rotor blades 2, i.e. three blades in this embodiment.
  • the blades 2 are mechanically connected to a rotation shaft 3 by the hub 4.
  • the hub 4 comprises three radially extending support structures 5, one radially extending support structure 5 for each rotor blade 2.
  • Each support structure comprises at least a first blade support point for receiving and supporting a rotor blade 2 (not shown in this Figure).
  • the hub 4 has three inclined support beams 6, one inclined support beam for each rotor blade 2. The first end portion of each inclined support beam 6 is connected to the corresponding radially extending support structure 5, and the second end portion of each inclined support beam 6 is collected in a common, connecting point 7 in an exterior position on the hub 4, which is in the front part of the hub 4.
  • peripheral support rods 8 are positioned in an exterior position on the hub 4, each of the three peripheral support rods 8 are connecting two of the radially extending support structures 5.
  • the inclined support beams 6 and the three peripheral support rods 8 have an airfoil shape providing aerodynamic lift upon wind engagement. This is shown in the exploded cross-sectional view named X6 of one beam 5. Similarly, this is also indicated by the exploded cross-sectional view named X8 of one rod 8.
  • the wind turbine generator 1 further comprises a shaft 9 having a substantially central position in the hub 4. This shaft 9 is extending substantially along the rotating shaft 3 for supporting the plurality of inclined support beams in the common, connecting point 7.
  • the airfoil shape of the three inclined support beams or stays 6 and the airfoil shape of the three peripheral support rods 8 are indicated as one airfoil shape, but it is also contemplated that separate, and possibly independently pitchable, parts could form part of the airfoil shape for each rod 8 or beam 6. It is to be understood that the beams 6 are inclined relative to a rotational plane of the radially extending structures 5.
  • auxiliary inclined beams may be provided in the hub 4.
  • the auxiliary beams may be fixed to the common point 7 in one end and fixed or mounted on a peripheral support rod 8 at the other end.
  • a hub By having airfoil shape even more wind could be advantageously applied or “harvested” by a hub according to the present invention.
  • the root of each rotor blade 2 is adapted for mounting on a corresponding radially extending support structure 5 so that the rotor blade 2 is pitchable, i.e. it may rotate around its longitudinal axis.
  • the lower part of the lift contributing part of the rotor blade must accordingly be dimensioned for such a rotation, i.e. it must not collide with the hub structure 4.
  • the hub structure 4 is considered to comprise inter alia the radially extending support structures 5 that may have an airfoil shape (cf. Figure 8). However, in other contexts it may be understood that the airfoil shaped radially extending support structures 5 are considered as an inner part of a blade structure of a wind turbine generator.
  • Figure 2 is a side view drawing of a wind turbine generator similar to Figure 1, where the pyramid-like open hub structure positioned in front of the nacelle 20 is apparent.
  • the tower 21 is also indicated.
  • the rotation shaft is lifted with a small angle relative to horizontal.
  • FIG 3 is a schematic drawing of a selected part of a hub in a wind turbine generator according to the present invention.
  • the each of three peripheral support rods 8 connects two radially extending support structures 5 directly.
  • one support rod 8 together with the two connected radially extending support structures 5 have a substantially triangular shape.
  • FIG 4 is a schematic drawing of a peripheral support rod configuration according to the present invention, where a peripheral support rod 8 connects two radially extending support structures 5' and 5" at two different radial positions relative to the rotating shaft.
  • the inclined support beams are omitted in this Figure.
  • rod 8 is connected to structure 5' at a larger radial distance, as seen from the rotation centre of the rotor blades 2, than the radial position where the rod 8 is connected or joined with the other structure 5". This has advantages both with respect to shifting the frequencies of edge vibrations of the rotor blades 2, and with respect to obtained beneficial aero dynamical benefit of the airfoil shape of the support rod 8.
  • FIG. 5 is a schematic perspective drawing of three connected radially extending support structures 5 comprised in the hub 4 according to the present invention.
  • the inclined support beams and the peripheral support rods are omitted in this Figure.
  • each radially extending support structure 5 comprises a hollow portion 5a for receiving a corresponding end portion of the rotor blade 2, which is positioned under the wing and therefore not visible in this Figure.
  • the rotor blades 2 are pitchably mounted in a first and a second support point (not visible in this Figure) within the structure 5, e.g. in a pitch bearing.
  • FIG 6 is a similar schematic perspective drawing of three connected radially extending support structures 5 comprised in the hub 4 according to the present invention.
  • each radially extending support structure 5 comprises a shaft extension 5b for entering a corresponding hollow portion (not shown in this view) of the rotor blade 2 for assembly.
  • the rotor blades 2 are pitchably mounted in a first and a second support point (not visible in this Figure) within the rotor blade 2, e.g. in a pitch bearing.
  • the shaft extension 5b can be made as one solid entity with the radially extending structure 5, or the shaft extension or stub shaft 5b may be mounted on the radially extending structure 5.
  • Figure 7 is a schematic plan view of three connected radially extending support structures 5 with two radial support points 60a and 60b according to the present invention, the support points 60a and 60b may be bearings or similar means for receiving the corresponding end part of a rotor blade 2.
  • the inclined support beams and the peripheral support rods are also omitted in this Figure.
  • the first 60a and a second 60b rotor blade support points are located at radially different positions relative to the rotating shaft 3 connected to the hub 4.
  • the said first and the said second rotor blade support points 60a and 60a may be located opposite each other in separate radial half parts of the radially extending support structure 5.
  • support points 60a are located in the outer half part of the radial length RS of the radially extending support structure 5, whereas support points 60b are located in the inner half part of the radial length RS of the radially extending support structure 5.
  • first 60a and the second 60b rotor blade support points are located with a radial distance r being at least 5%, 10% or 15% of the total rotor blade length R as measured from the rotational shaft 4.
  • the radially extending support structure 5 may have a radial extension RS of at least 10%, preferably at least 15%, or more preferably at least 20%, of the total rotor blade length R as measured from the rotational shaft 3.
  • a radial extension RS of at least 10%, preferably at least 15%, or more preferably at least 20%, of the total rotor blade length R as measured from the rotational shaft 3.
  • the longer the radially extending support structure 5 is the less amplitude there will be on the edge and flap vibration of the rotor blades 2.
  • improved control vibration frequencies of rotor blades will be obtained.
  • Figure 8 is a schematic perspective drawing similar to Figure 6 of three connected radially extending support structures 5 with airfoil shape according to the present invention.
  • the radially extending support structures have an airfoil shape providing aerodynamic lift upon wind engagement.
  • the structures 5 define a shape which, upon wind engagement, provides a significant lift.
  • the cross- sectional shape may be symmetric or anti-symmetric, but preferably an anti- symmetric cross-sectional shape may be chosen.
  • the aspect ratio of the cross- sectional shape i.e. the chord length to maximum thickness, is preferably in the interval from 2 to 10, more preferably in the interval from 4 to 8. Alternatively, the minimum aspect ratio is at least 2, 3, 4, 5, 6, 7, 8, 9, or 10.
  • the airfoil shape of the inclined support beams 6 and the peripheral support rods 8 can be pitchably mounted in order to provide a controllable lift, where the angle of attack can be changed.
  • the lift coefficient (C L ) can be at least 0.5, 0.7, 0.9, or at least 1.1 of any of the airfoil shaped hub parts according to the present invention.
  • Figure 9 is a schematic plan view of three connected radially extending support structures with temporary fixation means 80a and 80b according to the present invention.
  • the fixation means 80 has the functionality that the rotor blade 2 is adapted to be temporally fixated to the corresponding radially extending support structure 5 to allow for exchange of the first and the second rotor blade support 60a and 60b point within the radially extending support structure 5.
  • the fixation means 80a and 80b can be various mechanical fixation means, such as hydraulic jacks, screw jacks, etc.
  • the rotor blade 2 can have a receiving part 81a and 81b corresponding to the fixation means 80a and 80b, as indicated in Figure 8.
  • the fixation means 80 could for instance have a protruding part shaped to fit in a corresponding hollow part in the rotor blade 2.
  • the receiving part 81a and 81b and the fixation means 80a and 80b may, upon engagement, have a locking cooperation so as to firmly secure the rotor blade 2 during maintenance and service of the first and the second rotor blade support 60a and 60b points.

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  • Engineering & Computer Science (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

La présente invention concerne un aérogénérateur comprenant un moyeu qui comporte une pluralité de structures de support s'étendant radialement, qui sont chacune destinées à une pale de rotor respective et une pluralité de pièces de support inclinées, qui sont chacune destinées à une pale de rotor respective et/ou une première barre de support périphérique positionnée dans une position externe sur le moyeu, ladite première barre de support périphérique reliant deux desdites structures de support s'étendant radialement. Les pièces de support inclinées et/ou la première barre de support périphérique ont une forme aérodynamique pour produire la portance aérodynamique lors du contact. Ceci est avantageux pour obtenir une éolienne dans laquelle les résonances des pales de rotor sont régulées par une conception et un dimensionnement appropriés des multiples pièces de support inclinées et de la première barre de support périphérique. Parallèlement, le volume du moyeu est utilisé pour augmenter la portance aérodynamique tout en continuant d'assurer une structure relativement solide du moyeu.
PCT/DK2009/050280 2008-10-30 2009-10-27 Aérogénérateur comprenant un support de pale étendu WO2010048959A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US19802508P 2008-10-30 2008-10-30
DKPA200801500 2008-10-30
US61/198,025 2008-10-30
DKPA200801500 2008-10-30

Publications (2)

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WO2010048959A2 true WO2010048959A2 (fr) 2010-05-06
WO2010048959A3 WO2010048959A3 (fr) 2010-12-23

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479380B (en) * 2010-04-07 2015-07-08 Blade Dynamics Ltd A turbine rotor
EP3023634A1 (fr) * 2014-11-24 2016-05-25 Blade Dynamics Limited Moyeu pour une éolienne
US10507902B2 (en) 2015-04-21 2019-12-17 General Electric Company Wind turbine dome and method of assembly
US11480151B2 (en) 2018-09-13 2022-10-25 Vestas Wind Systems A/S Wind turbine with a blade carrying structure having aerodynamic properties

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH222864A (de) * 1941-09-19 1942-08-15 Forsch U Verwertungsgesellscha Windkraftmaschine.
WO1986002701A1 (fr) * 1984-11-01 1986-05-09 Christian Riisager Rotor de moulin a vent avec pales a pas ajustable; moulins a vent utilisant ce rotor
WO2008111841A2 (fr) * 2007-03-14 2008-09-18 Holmoey Vidar Rotor de turbine éolienne

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH222864A (de) * 1941-09-19 1942-08-15 Forsch U Verwertungsgesellscha Windkraftmaschine.
WO1986002701A1 (fr) * 1984-11-01 1986-05-09 Christian Riisager Rotor de moulin a vent avec pales a pas ajustable; moulins a vent utilisant ce rotor
WO2008111841A2 (fr) * 2007-03-14 2008-09-18 Holmoey Vidar Rotor de turbine éolienne

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479380B (en) * 2010-04-07 2015-07-08 Blade Dynamics Ltd A turbine rotor
EP3023634A1 (fr) * 2014-11-24 2016-05-25 Blade Dynamics Limited Moyeu pour une éolienne
US10507902B2 (en) 2015-04-21 2019-12-17 General Electric Company Wind turbine dome and method of assembly
US11480151B2 (en) 2018-09-13 2022-10-25 Vestas Wind Systems A/S Wind turbine with a blade carrying structure having aerodynamic properties

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