WO2000034650A1 - Eolienne amelioree - Google Patents

Eolienne amelioree Download PDF

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Publication number
WO2000034650A1
WO2000034650A1 PCT/IB1998/001953 IB9801953W WO0034650A1 WO 2000034650 A1 WO2000034650 A1 WO 2000034650A1 IB 9801953 W IB9801953 W IB 9801953W WO 0034650 A1 WO0034650 A1 WO 0034650A1
Authority
WO
WIPO (PCT)
Prior art keywords
axle
rods
cradle
wind turbine
rotor
Prior art date
Application number
PCT/IB1998/001953
Other languages
English (en)
Inventor
Nils Erik Gislason
Original Assignee
Nils Erik Gislason
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 Nils Erik Gislason filed Critical Nils Erik Gislason
Priority to AU12556/99A priority Critical patent/AU1255699A/en
Priority to PCT/IB1998/001953 priority patent/WO2000034650A1/fr
Publication of WO2000034650A1 publication Critical patent/WO2000034650A1/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
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • 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
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • 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
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1869—Linear generators; sectional generators
    • 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
    • F05B2240/21—Rotors for wind turbines
    • F05B2240/221—Rotors for wind turbines with horizontal axis
    • F05B2240/2211—Rotors for wind turbines with horizontal axis of the multibladed, low speed, e.g. "American farm" type
    • 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
    • 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
    • Y02E10/728—Onshore wind turbines

Definitions

  • the present invention relates to wind power devices, and particularly to a wind turbine having a rotor mounted on a horizontal axis in which the rotor of the turbine combines with a stator to generate electric power .
  • Windmills have been used for centuries for irrigation, for pumping water, and for turning grindstones in mills. With the development of electric power in the nineteenth century, efforts have been made to generate electrical power from the wind. Wind turbines represent an important alternative in regions without rivers as a source of hydroelectric power, and which lack an economic source of fossil fuels .
  • Wind turbines may have the rotor mounted on either a horizontal or a vertical axis.
  • the rotor is mounted to a horizontal shaft which rotates and is directly coupled to the shaft of an electric generator, e.g., U.S. Patent No. 5,474,425, issued December 12, 1995 to S.P. Lawlor; those in which the rotor has a rim circumferentially connecting the ends of the rotor blades, the rim frictionally engaging a wheel attached to the shaft of an electric generator, e.g., U.S. Patent No. 4,319,865, issued March 16, 1982 to J.G.
  • Devices in the latter category have the problem of maintaining a relatively constant air gap between the rim of the rotor and the stator under a varying wind load.
  • One problem is related to wind shear, or the different velocities of the wind at different heights, which can cause "teetering" or rocking of the rotor about its axis of rotation.
  • a second problem is related to wind direction. It is generally advantageous to provide some means for allowing the rotor to pivot or yaw in response to changes in wind direction in order to allow the rotor to continue rotate and generate power despite changes in wind direction.
  • the problem is to preserve the constant air gap between the rim of the rotor and the stator while allowing for teeter and yaw.
  • the Heyroth patent describes a multi-pole rotor and stator, but does not address the problem of maintaining a constant gap between rotor and stator. From the drawings it appears the stator is mounted to a rotating vertical shaft by a single support arm, and that the wind wheel has a vane for adjusting for yaw.
  • U.S. Patent No. 1,944,239, issued January 23, 1934 to H. Honeff teaches "dynamo" members attached to two wheels rotating in opposite directions, or alternatively, a rotating armature on the rotor and magnets mounted on a fixed bracket, but does not discuss adjustments due to teeter or yaw.
  • 1,231,251 published May 15, 1986, involves a wind wheel in which a friction wheel driven by the rim of the wheel is coupled to the shaft of an electric generator.
  • the device places the generator on a base or platform, which is connected with a motionless horizontal axle by flexible traction members and resilient springs, as well as including additional rollers in contact with the lateral surfaces of the rim.
  • the base is mounted on a rotatable shaft equipped with a drive motor in order to rotate the wheel to a stopping position in stormy weather. It appears, however, that this system may not be adaptable to a rotor and stator type wind turbine, as the rotor is necessarily in contact with the friction wheel.
  • the improved wind turbine has a wind rotor mounted on a motionless horizontal axle.
  • the axle is mounted in an axle housing which freely rotates on a bearing supported by a tower.
  • the rotor has a central hub, a rim concentric with the hub, and a plurality of blades disposed between the hub and the rim.
  • the turbine includes a plurality of magnets disposed on the rim and a stator in which an electrical impulse is induced by motion of the rotor.
  • the improvement is a platform on which the stator is mounted, the platform being supported by a cradle depending from the axle .
  • the cradle leans on an annular, rotatable yaw ring disposed about the tower, transferring the bending moment caused by the rotor and stator to the tower.
  • This disposition permits the rotor to yaw around the tower on the bearing freely in response to changes in wind direction, while maintaining a constant air gap between the rotor and the stator.
  • Still another object of the invention is to provide an improved wind turbine generating electrical power from movement of permanent magnets on the rim of a wind wheel relative to a stator which is more efficient in responding to changes in wind direction by providing a stator support which rotates in tandem with the rotor without the necessity of rotating the entire tower or supporting framework of the wind turbine .
  • Fig. 1 is a side elevational view of an improved wind turbine according to the present invention.
  • Fig. 2 is a front elevational view of an improved wind turbine according to the present invention.
  • Fig. 3 is a perspective view of an improved wind turbine according to the present invention with the rotor in shadow to show the details of the cradle. Similar reference characters denote corresponding features consistently throughout the attached drawings .
  • the present invention relates to wind turbines, and particularly to wind turbines which generate electrical power by means of permanent magnets attached to the rotor of the turbine moving with respect to a stator in a fixed position relative to the rotor.
  • the wind turbine 10 includes a rotor 20, also referred to as a wind wheel, having a circular hub 22, a circular rim 24 concentric with the hub 22, and a plurality of blades 26 disposed between the hub 22 and the rim 24, each blade 26 comprising a vane 26a mounted on a spoke 26b.
  • the blades 26 may have variable pitch in order to respond to changes in wind speed.
  • the hub 22 is mounted on a motionless, horizontal axle 28 by a plurality of roller bearings (not shown) so that the rotor 20 is freely rotatable on the axle 28.
  • the axle 28 is fixedly attached to an end support 30
  • the yaw bearing 32 permits the entire rotor 20 assembly and end support 30 to freely rotate or yaw in response to changes in the direction of the wind.
  • the tower 34 is shown as a basic tripod with supporting struts and braces omitted for clarity. It will be understood that the present invention may be used with any wind rotor support conventional in the industry, such as a conventional tube type tower.
  • the rim 24 of the rotor 20 has a plurality of magnets 36 fixedly attached thereto. As the rotor 20 rotates, the magnets 36 move in close approximation to a stator 38, as best seen in Fig. 1. The moving magnetic field induces an electrical voltage and current in the coils or loops of the stator 38, which are conducted through other wiring (not shown) for the storage and transmission of electrical power.
  • the purpose of the present invention is to provide a means for keeping the air gap between the stator 38 and the magnets 36 fixedly attached to the rim 24 of the rotor 20 substantially constant in spite of rotation of the rotor 20 assembly about the yaw bearing 32.
  • the present invention relates to means for supporting the stator 38, and includes a cradle 40 which has a platform 42 on which the stator 38 is mounted.
  • the cradle 40 is made from a plurality of rods or tubular members.
  • the rods 41a and 41b, together with axle 28, define a first triangle 41, rods 41a and 41b intersecting to form one vertex of triangle 41, the other ends of rods 41a and 41b being attached to axle 28 on opposite sides of rotor 20.
  • the rods 43a and 43b, together with axle 28, define a second triangle 43, rods 43a and 43b intersecting to form one vertex of triangle 43, the other ends of rods 43a and 43b being attached to axle 28 on opposite sides of rotor 20.
  • the triangles 41 and 43 lie in two planes forming a dihedral angle having its edge along the axis of axle 28.
  • Rod 44 joins the vertices of triangles 41 and 43 to complete the cradle 40. It will be understood that although only two triangles 41, 43 are shown in the drawings, the cradle 40 may include more than two triangles.
  • the rods 41a, 41b, 43a, and 43b are fixedly attached to the axle 28 on opposite sides of the rotor 20 so that the cradle 40 depends vertically from the axle 28.
  • the rods 41a, 41b, 43a, and 43b may be attached to the axle 28 by any conventional means, such as welding directly to the axle 28 or bolting to a collar 46 disposed about the axle 28, provided that the rods 41a, 41b, 43a, and 43b are fixedly attached so that the cradle 40 does not rotate about the axle 28.
  • the rods 41a, 41b, 43a, 43b and 44 may be any shape (cylindrical, square, flat bars, etc.), hollow or solid, aerodynamically streamlined or wing shaped, and made from aluminum, steel, or other alloy metal, provided that the length of the rods 41a, 41b, 43a, 43b, and 44 is substantially rigid and inelastic.
  • the platform 42 consists of four rods defining a quadrilateral shape with the four vertices fixedly attached to rods 41a, 41b, 43a, and 43b respectively.
  • the stator 38 is mounted on the platform 42 by a plurality of flexible mounting members 45.
  • the mounting members 45 are dimensioned and configured to flex in directions parallel to the axle 28 while being rigid enough to maintain the stator 38 a fixed distance radially from the longitudinal axis of the axle 28, thus partially adjusting for any "teeter” caused by wind shear.
  • the pull of the magnets 36 along the rim 24 of the rotor 20 maintains the stator 38 in alignment with the rotor 20 laterally.
  • the electrical power generated in the stator 38 may be conveyed by wiring (not shown) through or along the rods 41a, 41b, 43a, or 43b and end support 30 and slip rings in the yaw bearing 32 to a central mast (not shown) for storage or transmission.
  • a central mast not shown
  • the rotor 20 is mounted on the horizontal axle 28 in cantilever fashion.
  • the additional weight added by the stator 38 and cradle 40 increases the bending moment on the axle 28, felt most strongly at the junction of the axle 28 with the end support 30.
  • the present invention provides a pair of lateral support arms 50 fixedly attached to the platform 42 which "lean" on an annular yaw ring 52 disposed about the tower 34.
  • the support arms 50 may be extensions of the sides of the platform 42.
  • the yaw ring 52 is a circular track 54 which engages a plurality of rotatable roller wheels 55 disposed around the circumference of the tower 34.
  • the axles of the wheels 55 are attached to metal straps 57 which are fixedly attached to the top edges of a triangular support frame 59.
  • the corners of the support frame 59 are welded to the legs of the tower 34.
  • the yaw ring 52 is rotatably disposed about the tower 34 in a horizontal plane at substantially the same height as the platform 42 of the cradle 40.
  • the yaw ring 52 has been described with the roller wheels 55 attached to the tower 34 and the track 54 to the yaw ring 52, it will be obvious to those skilled in the art that the track 54 may be fixed to the tower 34 and the roller wheels 55 may be fixed to the yaw ring 52.
  • the lateral support arms 50 "lean" on the yaw ring 52 i.e., the lateral support arm 50 are fixedly attached to the circumference of the track 54 of the yaw ring 52, as by welding, preferably at diametrically opposite sides of the yaw ring 52.
  • a pair of support rods 51 extend from the ends of rod 44 to the circumference of the track 54 of the yaw ring 52 at approximately the same points as support arms 50 are attached to the track 54.
  • a rigid triangle formed by one of the support arms 50, one of the support rods 51, and a portion of rod 41a, 41b, 43a, or 43b, joins the cradle 40 to the yaw ring 52 on diametrically opposite sides of the yaw ring 52, preventing the cradle 40 from bending towards the tower 34 as a result of wind shear.
  • the cradle 40 and the lateral support arms 50 will rotate about the longitudinal axis of the tower 34 as the rotor 20 assembly yaws in the wind. Since the yaw ring 52 is rotatably disposed about the tower 34, the yaw ring 52 will rotate in synchronization with the rotor 20 assembly through the fixed attachment between the lateral support arms 50 and the track 54 of the yaw ring 52. In this manner the bending moment at the axle 28 is cancelled and the stress translated to the tower 34.
  • the advantage of constructing the platform 42 from rods instead of a planar member is that the cradle 40 and platform 42 present as low a profile to the wind as possible.
  • the disposition of the support arms 50 and support rods 51 is advantageous in that they maintain the cradle 40 at a fixed distance from the tower 34 during rotation around the yaw bearing 32.
  • the improvements of the present invention provides an efficient means for maintaining a stator in fixed relation to a rotating magnetic field on the rim of a horizontal axis wind turbine without increasing stress on the axle and permitting the rotor to yaw freely in response to changes in the direction of the wind.

Landscapes

  • 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)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne une éolienne améliorée (10) équipée d'un rotor d'éolienne (20), lequel est monté sur un axe horizontal immobile (28). L'axe (28) est monté sur un support d'extrémité (30), lui-même en rotation libre sur un palier (32), soutenu par une tour (34). Le rotor (20) a un moyeu central (22), une jante (24) concentrique par rapport au moyeu (22), et plusieurs pales (26) placées entre le moyeu (22) et la jante (24). La turbine (10) comprend plusieurs aimants (36) placés sur la jante (24) et un stator (38) dans lequel une impulsion électrique est induite par le mouvement du rotor (20). L'amélioration consiste en une plate-forme (42) sur laquelle le stator (38) est monté, la plate-forme (42) étant soutenue par un berceau (40) qui dépend de l'axe (28). Le berceau (40) est incliné sur un anneau d'orientation rotatif (52) placé autour de la tour (34), qui transfère le moment de flexion provenant du rotor (20) et du stator (38) à la tour (34).
PCT/IB1998/001953 1998-12-09 1998-12-09 Eolienne amelioree WO2000034650A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU12556/99A AU1255699A (en) 1998-12-09 1998-12-09 Improved wind turbine
PCT/IB1998/001953 WO2000034650A1 (fr) 1998-12-09 1998-12-09 Eolienne amelioree

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB1998/001953 WO2000034650A1 (fr) 1998-12-09 1998-12-09 Eolienne amelioree

Publications (1)

Publication Number Publication Date
WO2000034650A1 true WO2000034650A1 (fr) 2000-06-15

Family

ID=11004786

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1998/001953 WO2000034650A1 (fr) 1998-12-09 1998-12-09 Eolienne amelioree

Country Status (2)

Country Link
AU (1) AU1255699A (fr)
WO (1) WO2000034650A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002016768A1 (fr) * 2000-08-10 2002-02-28 Wilfried Arand Turbine eolienne en porte-a-faux
EP1703124A1 (fr) * 2005-03-12 2006-09-20 Ernst Vogel Éolienne compacte
US7482720B2 (en) 2001-06-06 2009-01-27 Evolving Generation Limited Rotor and electrical generator
WO2009118138A2 (fr) * 2008-03-27 2009-10-01 Herbert Radermacher Éolienne pour la production d'électricité
WO2010021737A2 (fr) * 2008-08-22 2010-02-25 Natural Power Concepts, Inc. Turbine à couronne
EP2171267A1 (fr) * 2007-06-15 2010-04-07 E-Net Système générateur d'énergie par turbine
EP2432990A2 (fr) * 2009-05-20 2012-03-28 E-net, Llc Eolienne
CN110425082A (zh) * 2019-08-06 2019-11-08 国电联合动力技术有限公司 一种发电机组偏航系统和方法及偏航驱动方法
US10968893B2 (en) 2016-06-27 2021-04-06 Vestas Wind Systems A/S Wind turbine comprising a parking structure for carrying the rotor during removal of the nacelle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233232A (en) * 1916-02-09 1917-07-10 Albert Herman Heyroth Wind-wheel electric generator.
JPS5762973A (en) * 1980-10-05 1982-04-16 Takanobu Fukuoka Wind activated power plant having lift mechanism
SU1170187A1 (ru) * 1983-04-11 1985-07-30 Московский Ордена Ленина И Ордена Октябрьской Революции Энергетический Институт Безредукторный ветроагрегат
SU1250696A1 (ru) * 1985-03-12 1986-08-15 Комсомольский-на-Амуре политехнический институт Безредукторный ветроагрегат
WO1997013979A1 (fr) * 1995-10-13 1997-04-17 Nils Erik Gislason Eolienne a axe horizontal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233232A (en) * 1916-02-09 1917-07-10 Albert Herman Heyroth Wind-wheel electric generator.
JPS5762973A (en) * 1980-10-05 1982-04-16 Takanobu Fukuoka Wind activated power plant having lift mechanism
SU1170187A1 (ru) * 1983-04-11 1985-07-30 Московский Ордена Ленина И Ордена Октябрьской Революции Энергетический Институт Безредукторный ветроагрегат
SU1250696A1 (ru) * 1985-03-12 1986-08-15 Комсомольский-на-Амуре политехнический институт Безредукторный ветроагрегат
WO1997013979A1 (fr) * 1995-10-13 1997-04-17 Nils Erik Gislason Eolienne a axe horizontal

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 198608, Derwent World Patents Index; AN 1986-53699/08 *
DATABASE WPI Week 198714, Derwent World Patents Index; AN 1987-100148/14 *
PATENT ABSTRACTS OF JAPAN vol. 6, no. 142 (M - 146) *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002016768A1 (fr) * 2000-08-10 2002-02-28 Wilfried Arand Turbine eolienne en porte-a-faux
US7482720B2 (en) 2001-06-06 2009-01-27 Evolving Generation Limited Rotor and electrical generator
EP1703124A1 (fr) * 2005-03-12 2006-09-20 Ernst Vogel Éolienne compacte
EP2171267A4 (fr) * 2007-06-15 2013-11-27 E Net Llc Système générateur d'énergie par turbine
EP2171267A1 (fr) * 2007-06-15 2010-04-07 E-Net Système générateur d'énergie par turbine
WO2009118138A2 (fr) * 2008-03-27 2009-10-01 Herbert Radermacher Éolienne pour la production d'électricité
WO2009118138A3 (fr) * 2008-03-27 2010-05-14 Herbert Radermacher Éolienne pour la production d'électricité
GB2475020A (en) * 2008-08-22 2011-05-04 Natural Power Concepts Inc Rimmed turbine
WO2010021737A3 (fr) * 2008-08-22 2010-07-22 Natural Power Concepts, Inc. Turbine à couronne
KR20110063477A (ko) * 2008-08-22 2011-06-10 내츄럴 파워 컨셉 인코포레이티드 림드 터빈
WO2010021737A2 (fr) * 2008-08-22 2010-02-25 Natural Power Concepts, Inc. Turbine à couronne
US8598731B2 (en) 2008-08-22 2013-12-03 Natural Power Concepts, Inc. Rimmed turbine
KR101651303B1 (ko) 2008-08-22 2016-08-25 내츄럴 파워 컨셉 인코포레이티드 림드 터빈
EP2432990A2 (fr) * 2009-05-20 2012-03-28 E-net, Llc Eolienne
EP2432990A4 (fr) * 2009-05-20 2014-09-24 E Net Llc Eolienne
US10968893B2 (en) 2016-06-27 2021-04-06 Vestas Wind Systems A/S Wind turbine comprising a parking structure for carrying the rotor during removal of the nacelle
CN110425082A (zh) * 2019-08-06 2019-11-08 国电联合动力技术有限公司 一种发电机组偏航系统和方法及偏航驱动方法

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