WO2011063815A1 - Method of mounting a hydraulic pitch control system in a wind turbine hub - Google Patents

Method of mounting a hydraulic pitch control system in a wind turbine hub Download PDF

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Publication number
WO2011063815A1
WO2011063815A1 PCT/DK2010/050318 DK2010050318W WO2011063815A1 WO 2011063815 A1 WO2011063815 A1 WO 2011063815A1 DK 2010050318 W DK2010050318 W DK 2010050318W WO 2011063815 A1 WO2011063815 A1 WO 2011063815A1
Authority
WO
WIPO (PCT)
Prior art keywords
wtg
pitch control
control system
hydraulic
hub
Prior art date
Application number
PCT/DK2010/050318
Other languages
French (fr)
Inventor
Ole Fosgrau Rasmussen
Original Assignee
Avn Energy 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 Avn Energy A/S filed Critical Avn Energy A/S
Priority to EP10832677.8A priority Critical patent/EP2516851A4/en
Publication of WO2011063815A1 publication Critical patent/WO2011063815A1/en

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
    • F03D1/0691—Rotors characterised by their construction elements of the hub
    • 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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0224—Adjusting blade pitch
    • 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
    • F05B2230/00—Manufacture
    • F05B2230/60—Assembly methods
    • 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
    • F05B2250/00—Geometry
    • F05B2250/10—Geometry two-dimensional
    • F05B2250/11—Geometry two-dimensional triangular
    • 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
    • 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
    • F05B2270/00—Control
    • F05B2270/60—Control system actuates through
    • F05B2270/604—Control system actuates through hydraulic actuators
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a pitch control system for wind turbine generators (WTG) of the type mentioned in the preamble to claim 1.
  • WTG wind turbine generators
  • known pitch control systems using either an electric or a hydraulic pitch control solution. Both systems have advantages and only a few disadvantages. More specific the present invention relates to a hydraulic pitch control system which has many advantages and only a few disadvantages compared with an electric pitch control solution.
  • known hydraulic pitch control systems is rather complicated apparatuses requiring a lot of assembling work including complicated functionality testing before the mountings in situ and which normally also requires intensive security test after the mountings work in situ of such complicated pitch control systems.
  • the present invention has for its purpose to provide a new and improved hydraulic pitch control system, by means of which may be obtained a minimum of in situ mounting works and where in situ testing of the pith control system may even be superfluous.
  • the hydraulic pitch control system according to the invention is characterized in that said hydraulic pitch control system is in the form of a prefabricated, assembled and tested one piece hydraulic pitch control system unit ready for in situ mounting inside said WTG hub with a minimum of mounting work.
  • said minimum mounting work may consists in connecting a predominantly triangular front frame structure of a carrying frame system for said hydraulic pitch control unit to a inside of a hub connection flange of said WTG hub opposite to an external connection flange for a main generator shaft of the WTG, by means of three sets of each two - four bolts and by connecting three sets of each two hydraulic tubes of the pitch control system to each of three hydraulic actuators for the WTG blades.
  • the pitch control system according to the invention comprising energy re- serves in the form of a number of hydraulic pressure accumulators in the form of hydraulic cylinders which at one side of a piston are filled with hydraulic fluid while at the opposite side of the piston a pressure medium such as compressed nitrogen is present.
  • the pitch control system according to the invention is furthermore such provided, that said carrying frame system comprise three inclined carrying arm members extending from said triangular front frame structure to a central carrying frame structure at the opposite end of the pitch control system, where active parts of three uniform partial hydraulic pitch control systems are situated.
  • the pitch control system according to the invention is such provided, that said cylindrical hydraulic pressure accumulators are arranged in three groups so as to form a mutually balanced isosceles triangle, which groups of hydraulic pressure accumulators at one end are connected to said triangular front frame structure and at the opposite end are mutual interconnected at adjacent corners.
  • each of said three groups consists of four cylindrical hydraulic pressure accumulators which at external side is provided with a plate shaped cover also having function as standing platform when entering the WTG hub for maintenance service of the pitch control unit.
  • hydraulic pith control system fulfils as a one piece hydraulic pitch control system the following important features: • Assembled outside the WTG hub
  • Fig. 1 shows a perspective view of an embodiment of a prefabricated hydraulic pitch control system according to the invention
  • Fig. 2 shows a perspective view illustrating how the hydraulic pitch control system as a prefabricated unit is mounted inside a WTG hub opposite to the generator main shaft,
  • Fig. 3 shows the size of the WTG hub and the hydraulic pitch control system by showing a grown up person inside the WTG hub as well
  • Fig. 4 shows the hydraulic pitch control system as seen from the rear end of The WTG hub or the position of the generator main shaft
  • Fig. 5 shows the hydraulic pitch control system as seen from the opposite open front end of the WTG hub.
  • Fig. 1 shows an embodiment of a prefabricated one piece hydraulic pitch control system unit 2 according to the invention comprising three uniform hydraulic pitch control systems 4 each of which in principle is similar to the hydraulic pitch control system shown in Fig. 6 and where the three hydraulic pitch control systems 4 are arranged in a triangle extending cantilever from a triangular front frame structure 6 of a carrying frame system 8 adapted inside a WTG hub 10 (Figs. 2-5) to be connected to an inside of a hub connection flange 12 opposite to an external connection flange for a main generator shaft.
  • Said carrying frame system 6 comprise three inclined carrying arm members 14 extending from said triangular front frame structure 6 to a central carrying frame structure at the opposite end of the hydraulic pitch control system unit 2, where active parts of three uniform partial hydraulic pitch control systems 4 are situated.
  • Each of the three hydraulic pitch control systems 4 comprise a group of four hydraulic pressure accumulators 16 in the form of hydraulic cylinders 18, which at one side of a piston is filled with hydraulic fluid, while at the opposite side of said piston a pressure medium such as nitrogen is present.
  • Each of the four groups of hydraulic pressure ac- cumulators are provided with a plate shaped cover 20 also having function as standing platform when persons entering the WTG hub 10 for maintenance service of the pitch control systems 4.
  • the one piece hydraulic pitch control system unit 2 is as already mentioned mounted extending cantilever from the triangular carrying frame system 6 inside the WTG hub 10 by means of only a few bolts at the respective outside corners of the carrying frame system 6. Afterwards the in situ mounting is completed by connecting two hydraulic tubes between each hydraulic pitch control systems 4 and the hydraulic actuator of each WTG blades.
  • hydraulic pith control system fulfils as a one piece hydraulic pitch control system unit 2 the following important features: ⁇ Assembled outside the WTG hub
  • the pitch control system is adapted to be assembled at the main axle interface in the hub, and without any stiffeners in order to avoid loads to the pith control system originating from the structural flexing of the WTG hub.
  • the pitch control system shows a very compact design and construction that enables the pitch control system as a complete assembly to enter the WTG hub either from the main axle side or from the front side of the WTG hub.
  • the entire pitch control system unit 2 according to the invention is maintenance service friendly.

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

Abstract

A pitch control system for wind turbine generator (WTG), in particular a hydraulic pitch control system, of the type being adapted to be mounted inside a WTG hub (10) for controlling the pitch of the WTG blades in relation to the direction of the wind so as to optimize the power outcome of the WTG and to secure neutral pitch of the WTG blades during braking down the WTG as well, where said hydraulic pitch control system is in the form of a prefabricated, assembled and tested one piece hydraulic pitch control system unit (2) ready for in situ mounting inside said WTG hub (10) with a minimum of mounting work. Hereby is obtained that hitherto rather difficult in situ mounting work - inside the WTG hub - may be reduced to a minimum and that in situ testing of the pith control system may even be superfluous. Furthermore is obtained a considerably reduction of the time consumption in connection with the in situ mounting work by the installation of the pitch control system inside the WTG hub.

Description

Method of mounting a hydraulic pitch control system in a wind turbine hub Field of the Invention
The present invention relates to a pitch control system for wind turbine generators (WTG) of the type mentioned in the preamble to claim 1.
Background of the Invention
Known pitch control systems using either an electric or a hydraulic pitch control solution. Both systems have advantages and only a few disadvantages. More specific the present invention relates to a hydraulic pitch control system which has many advantages and only a few disadvantages compared with an electric pitch control solution. However, known hydraulic pitch control systems is rather complicated apparatuses requiring a lot of assembling work including complicated functionality testing before the mountings in situ and which normally also requires intensive security test after the mountings work in situ of such complicated pitch control systems.
Object of the Invention
The present invention has for its purpose to provide a new and improved hydraulic pitch control system, by means of which may be obtained a minimum of in situ mounting works and where in situ testing of the pith control system may even be superfluous.
Description of the Invention
The hydraulic pitch control system according to the invention is characterized in that said hydraulic pitch control system is in the form of a prefabricated, assembled and tested one piece hydraulic pitch control system unit ready for in situ mounting inside said WTG hub with a minimum of mounting work.
Hereby is obtained that hitherto rather difficult in situ mounting work - inside the WTG hub - may be reduced to a minimum and that in situ testing of the pith control system may even be superfluous. Furthermore is obtained a considerably reduction of the time consumption in connection with the in situ mounting work by the installation of the pitch control system inside the WTG hub. In order obtain a cantilever mounting of said hydraulic pitch control system said minimum mounting work may consists in connecting a predominantly triangular front frame structure of a carrying frame system for said hydraulic pitch control unit to a inside of a hub connection flange of said WTG hub opposite to an external connection flange for a main generator shaft of the WTG, by means of three sets of each two - four bolts and by connecting three sets of each two hydraulic tubes of the pitch control system to each of three hydraulic actuators for the WTG blades.
Preferably, the pitch control system according to the invention comprising energy re- serves in the form of a number of hydraulic pressure accumulators in the form of hydraulic cylinders which at one side of a piston are filled with hydraulic fluid while at the opposite side of the piston a pressure medium such as compressed nitrogen is present.
The pitch control system according to the invention is furthermore such provided, that said carrying frame system comprise three inclined carrying arm members extending from said triangular front frame structure to a central carrying frame structure at the opposite end of the pitch control system, where active parts of three uniform partial hydraulic pitch control systems are situated. Preferably, the pitch control system according to the invention is such provided, that said cylindrical hydraulic pressure accumulators are arranged in three groups so as to form a mutually balanced isosceles triangle, which groups of hydraulic pressure accumulators at one end are connected to said triangular front frame structure and at the opposite end are mutual interconnected at adjacent corners.
And in order to make it more easy to get access to the service work of the pitch control system according to the invention it may advantageously be such provided, that each of said three groups consists of four cylindrical hydraulic pressure accumulators which at external side is provided with a plate shaped cover also having function as standing platform when entering the WTG hub for maintenance service of the pitch control unit.
In other words the hydraulic pith control system according to the present invention fulfils as a one piece hydraulic pitch control system the following important features: • Assembled outside the WTG hub
• Complete control system including the required energy reserves to perform emergency stop of the WTG (by full pitch)
• Flushed to required cleanliness level outside before assembling to The WTG hub
• Functionality tested outside before assembly to the WTG hub
• Pressure and leakage tested outside before assembly to the WTG hub
• Service friendliness must be maintained after assembly
Description of the Drawing
The invention is described in more details with reference to the accompanying drawing in which:
Fig. 1 shows a perspective view of an embodiment of a prefabricated hydraulic pitch control system according to the invention,
Fig. 2 shows a perspective view illustrating how the hydraulic pitch control system as a prefabricated unit is mounted inside a WTG hub opposite to the generator main shaft,
Fig. 3 shows the size of the WTG hub and the hydraulic pitch control system by showing a grown up person inside the WTG hub as well,
Fig. 4 shows the hydraulic pitch control system as seen from the rear end of The WTG hub or the position of the generator main shaft, and
Fig. 5 shows the hydraulic pitch control system as seen from the opposite open front end of the WTG hub.
Detailed Description of the Invention
Fig. 1 shows an embodiment of a prefabricated one piece hydraulic pitch control system unit 2 according to the invention comprising three uniform hydraulic pitch control systems 4 each of which in principle is similar to the hydraulic pitch control system shown in Fig. 6 and where the three hydraulic pitch control systems 4 are arranged in a triangle extending cantilever from a triangular front frame structure 6 of a carrying frame system 8 adapted inside a WTG hub 10 (Figs. 2-5) to be connected to an inside of a hub connection flange 12 opposite to an external connection flange for a main generator shaft.
Said carrying frame system 6 comprise three inclined carrying arm members 14 extending from said triangular front frame structure 6 to a central carrying frame structure at the opposite end of the hydraulic pitch control system unit 2, where active parts of three uniform partial hydraulic pitch control systems 4 are situated.
Each of the three hydraulic pitch control systems 4 comprise a group of four hydraulic pressure accumulators 16 in the form of hydraulic cylinders 18, which at one side of a piston is filled with hydraulic fluid, while at the opposite side of said piston a pressure medium such as nitrogen is present. Each of the four groups of hydraulic pressure ac- cumulators are provided with a plate shaped cover 20 also having function as standing platform when persons entering the WTG hub 10 for maintenance service of the pitch control systems 4.
As shown in Fig. 2 the one piece hydraulic pitch control system unit 2 is as already mentioned mounted extending cantilever from the triangular carrying frame system 6 inside the WTG hub 10 by means of only a few bolts at the respective outside corners of the carrying frame system 6. Afterwards the in situ mounting is completed by connecting two hydraulic tubes between each hydraulic pitch control systems 4 and the hydraulic actuator of each WTG blades.
As mentioned above the hydraulic pith control system according to the present invention fulfils as a one piece hydraulic pitch control system unit 2 the following important features: · Assembled outside the WTG hub
• Complete control system including the required energy reserves to perform emergency stop of the WTG (by full pitch)
• Flushed to required cleanliness level outside before assembling to The WTG hub • Functionality tested outside before assembly to the WTG hub
• Pressure and leakage tested outside before assembly to the WTG hub
• Service friendliness must be maintained after assembly It is easy to understand that the prefabrication and assembling of the pitch control system according to the invention as a one piece hydraulic pitch control system unit 2 ready for mounting inside the WTG hub 10 with a minimum of in situ mounting work has great importance also regarding the necessary certification of the pitch control system.
According to the invention the pitch control system is adapted to be assembled at the main axle interface in the hub, and without any stiffeners in order to avoid loads to the pith control system originating from the structural flexing of the WTG hub. The pitch control system shows a very compact design and construction that enables the pitch control system as a complete assembly to enter the WTG hub either from the main axle side or from the front side of the WTG hub.
And furthermore, it is of great importance that the entire pitch control system unit 2 according to the invention is maintenance service friendly.

Claims

1. A pitch control system for wind turbine generator (WTG), in particular a hydraulic pitch control system, of the type being adapted to be mounted inside a WTG hub (10) for controlling the pitch of the WTG blades in relation to the direction of the wind so as to optimize the power outcome of the WTG and to secure neutral pitch of the WTG blades during braking down the WTG as well, characterized in, that said hydraulic pitch control system is in the form of a prefabricated, assembled and tested one piece hydraulic pitch control system unit (2) ready for in situ mounting inside said WTG hub (10) with a minimum of mounting work.
2. A pitch control system according to claim 1, characterized in, that said minimum mounting work consists in connecting a predominantly triangular front frame structure of a carrying frame system (6) for said hydraulic pitch control unit to a inside of a hub connection flange (12) of said WTG hub opposite to an external connection flange for a main generator shaft of the WTG, by means of three sets of each two - four bolts and by connecting three sets of each two hydraulic tubes of the pitch control system to each of three hydraulic actuators for the WTG blades.
3. A pitch control system according to claim 1, characterized in, comprising energy reserves in the form of a number of hydraulic pressure accumulators (16) in the form of hydraulic cylinders (18) which at one side of a piston are filled with hydraulic fluid while at the opposite side of the piston a pressure medium such as compressed nitrogen is present.
4. A pitch control system according to claims 1 and 2, characterized in, that said carrying frame system comprise three inclined carrying arm members (14) extending from said triangular front frame structure (6) to a central carrying frame structure at the opposite end of the pitch control system, where active parts of three uniform partial hy- draulic pitch control systems (4) are situated.
5. A pitch control system according to claims 1-3, characterized in, that said cylindrical hydraulic pressure accumulators (16) are arranged in three groups so as to form a mutually balanced isosceles triangle, which groups of hydraulic pressure accumulators at one end are connected to said triangular front frame structure (6) and at the opposite end are mutual interconnected at adjacent corners.
6. A pitch control system according to claim 5, characterized in, that each of said three groups consists of four cylindrical hydraulic pressure accumulators (16) which at external side is provided with a plate shaped cover (20) also having function as standing platform when entering the WTG hub (10) for maintenance service of the pitch control unit (2).
PCT/DK2010/050318 2009-11-25 2010-11-24 Method of mounting a hydraulic pitch control system in a wind turbine hub WO2011063815A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10832677.8A EP2516851A4 (en) 2009-11-25 2010-11-24 Method of mounting a hydraulic pitch control system in a wind turbine hub

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200970229 2009-11-25
DKPA200970229 2009-11-25

Publications (1)

Publication Number Publication Date
WO2011063815A1 true WO2011063815A1 (en) 2011-06-03

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Application Number Title Priority Date Filing Date
PCT/DK2010/050318 WO2011063815A1 (en) 2009-11-25 2010-11-24 Method of mounting a hydraulic pitch control system in a wind turbine hub

Country Status (2)

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EP (1) EP2516851A4 (en)
WO (1) WO2011063815A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2653716A1 (en) * 2012-04-16 2013-10-23 Siemens Aktiengesellschaft Installation/dismounting of a hub to/from a nacelle of a wind turbine by using a blade pitch angle adjustment device of the hub for orientating the hub
US20140064963A1 (en) * 2012-09-06 2014-03-06 Hitachi, Ltd. Wind Turbine System, an Assembling Method of a Wind Turbine System, an Inspecting Method of a Wind Turbine System, and an Operation Method of a Wind Turbine System
CN109356793A (en) * 2018-08-31 2019-02-19 北京金风科创风电设备有限公司 Mounting rack, energy storage unit, variable pitch system, wind generating set and method

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Publication number Priority date Publication date Assignee Title
WO2013176723A1 (en) 2012-05-22 2013-11-28 United Technologies Corporation Wind turbine load mitigation

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GB2071779A (en) * 1980-03-17 1981-09-23 United Technologies Corp Wind turbine blade pitch adjustment system
EP1241350A1 (en) * 2001-01-22 2002-09-18 Fundacion Fatronik Individual pitch adjustment system for rotor blades
EP1497562A1 (en) * 2002-04-24 2005-01-19 Vestas Wind Systems A/S Wind turbine, hydraulic system, air bleed system and method of controlling at least two wind turbine blades
JP2005113823A (en) * 2003-10-09 2005-04-28 Yanmar Co Ltd Wind power generating set

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GB2071779A (en) * 1980-03-17 1981-09-23 United Technologies Corp Wind turbine blade pitch adjustment system
EP1241350A1 (en) * 2001-01-22 2002-09-18 Fundacion Fatronik Individual pitch adjustment system for rotor blades
EP1497562A1 (en) * 2002-04-24 2005-01-19 Vestas Wind Systems A/S Wind turbine, hydraulic system, air bleed system and method of controlling at least two wind turbine blades
JP2005113823A (en) * 2003-10-09 2005-04-28 Yanmar Co Ltd Wind power generating set

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2653716A1 (en) * 2012-04-16 2013-10-23 Siemens Aktiengesellschaft Installation/dismounting of a hub to/from a nacelle of a wind turbine by using a blade pitch angle adjustment device of the hub for orientating the hub
CN103375361A (en) * 2012-04-16 2013-10-30 西门子公司 Installation/dismounting of a hub to/from a nacelle of a wind turbine by using a blade pitch angle adjustment device of the hub for orientating the hub
US9303620B2 (en) 2012-04-16 2016-04-05 Siemens Aktiengesellschaft Installation/dismounting of a hub to/from a nacelle of a wind turbine by using a blade pitch angle adjustment device of the hub for orientating the hub
US20140064963A1 (en) * 2012-09-06 2014-03-06 Hitachi, Ltd. Wind Turbine System, an Assembling Method of a Wind Turbine System, an Inspecting Method of a Wind Turbine System, and an Operation Method of a Wind Turbine System
US9429137B2 (en) * 2012-09-06 2016-08-30 Hitachi, Ltd. Wind turbine system, an assembling method of a wind turbine system, an inspecting method of a wind turbine system, and an operation method of a wind turbine system
EP2706226A3 (en) * 2012-09-06 2018-04-04 Hitachi, Ltd. A wind turbine system, an assembling method of a wind turbine system, an inspecting method of a wind turbine system, and an operation method of a wind turbine system
CN109356793A (en) * 2018-08-31 2019-02-19 北京金风科创风电设备有限公司 Mounting rack, energy storage unit, variable pitch system, wind generating set and method
WO2020042633A1 (en) * 2018-08-31 2020-03-05 北京金风科创风电设备有限公司 Mounting frame, energy storage unit, variable pitch system, wind turbine generator and method
EP3680480A4 (en) * 2018-08-31 2020-10-21 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. Mounting frame, energy storage unit, variable pitch system, wind turbine generator and method
AU2019330577B2 (en) * 2018-08-31 2021-08-05 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. Mounting frame, energy storage unit, variable pitch system, wind turbine generator and method
US11493028B2 (en) 2018-08-31 2022-11-08 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. Mounting frame, energy storage unit, pitch system, wind turbine and method

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Publication number Publication date
EP2516851A1 (en) 2012-10-31
EP2516851A4 (en) 2014-06-18

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