WO2015128426A1 - Agencement d'articulation de pas pour générateur à turbine éolienne - Google Patents

Agencement d'articulation de pas pour générateur à turbine éolienne Download PDF

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Publication number
WO2015128426A1
WO2015128426A1 PCT/EP2015/054050 EP2015054050W WO2015128426A1 WO 2015128426 A1 WO2015128426 A1 WO 2015128426A1 EP 2015054050 W EP2015054050 W EP 2015054050W WO 2015128426 A1 WO2015128426 A1 WO 2015128426A1
Authority
WO
WIPO (PCT)
Prior art keywords
pitch shaft
pitchable
pitch
rotor
drive mechanism
Prior art date
Application number
PCT/EP2015/054050
Other languages
English (en)
Inventor
Rolf Rohden
Original Assignee
youWINenergy GmbH
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 youWINenergy GmbH filed Critical youWINenergy GmbH
Publication of WO2015128426A1 publication Critical patent/WO2015128426A1/fr

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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
    • 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
    • F03D7/0228—Adjusting blade pitch of the blade tips only
    • 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
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • 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 a wind turbine rotor comprising a blade pitch system, a drive mechanism for a blade pitch system as well as to a wind turbine installation comprising such a wind turbine rotor.
  • Present-day wind turbines include an electric generator for producing electricity.
  • the electric generator typically comprises a rotating part and a stationary part also referred to as rotor and stator, respectively.
  • the rotor generally includes permanent or excited magnets and the stator generally includes electrical windings or coils.
  • the rotor rotates with respect to the stator causing the generation of an electric current due to the cooperation of the magnets and the windings or coils.
  • the rotor can typically be directly connected to a rotor hub of the wind turbine. On the rotor hub, one or more blades are provided.
  • an incoming wind stream impinging on the rotor blades exerts thrust/lift on the rotor blades. The force generated in this way depends on the profile of the rotor blades.
  • One of the contributing factors includes the angle of attack of the incoming wind. That is, for a certain angle of attack, the aerodynamic lift force at the blade caused by the wind will vary depending on the wind speed. Consequently, for different wind speeds, it is possible to determine an optimum angle of attack producing a maximum aerodynamic lift force for different wind speeds.
  • the angle of attack can be changed by rotating the blade about its longitudinal axis until the angle of attack is most suitable for the corresponding wind speed.
  • the process of rotating the blade about its longitudinal axis is also referred to as pitching.
  • the rotational angle of the blade is referred to as pitch angle.
  • the wind turbine may be provided with a corresponding monitoring device.
  • This monitoring device can output a signal corresponding to a change of the wind speed to a pitching mechanism which can change the angle of attack by pitching the blade about a pitch angle.
  • the pitch mechanism is not used. Pitching starts shortly before rated power in order to limit the power output to rated power with increasing winds.
  • the pitching mechanism decreases the angle of attack in case the wind speed is high. It is also possible to rotate the rotor blades to a so called feathered position, where the rotor blades experience no thrust in case of extremely high wind conditions.
  • the pitching mechanism effecting the pitching of the rotor blades includes a drive mechanism operatively connected to the rotor blade.
  • the rotor blades are rotatably coupled to the rotor hub through a bearing arrangement.
  • the bearing arrangement also handles static and the dynamic loads experienced at the rotor hub.
  • the static loads typically arise due to the mass of the rotor blades whereas the dynamic loads arise during the rotation of the rotor blades.
  • the basic concept of the present subject matter relates to a wind turbine rotor comprising a rotor hub, one or more blades mounted on said rotor hub and a blade pitch system with a pitch bearing arrangement.
  • Each blade comprises a non-pitchable portion and a pitchable portion.
  • the pitch bearing arrangement has a pitch shaft and two or more bearings provided on said pitch shaft. The two or more bearings are spaced from each other in the axial direction of the pitch shaft.
  • the pitchable portion is connected to a first end of the pitch shaft so as to be integrally rotatable therewith.
  • each blade comprises a non-pitchable portion and a pitchable portion.
  • the pitchable portion is pitchable with respect to the non-pitchable portion.
  • the pitchable portion can form a major part of the blade.
  • the non-pitchable portion only forms a small part of the blade.
  • the non- pitchable portion can be provided directly on the rotor hub. That is, the non-pitchable portion can be mounted on the rotor hub or can be integrally formed therewith.
  • the non-pitchable portion and the pitchable portion are preferably constructed such that a transition from the outer surface of the non-pitchable portion to the outer surface of the pitchable portion is smooth and does not comprise a significant change in the outer contour.
  • Such an arrangement provides enhanced aerodynamic characteristics. Consequently, the wind can smoothly flow around the blade at the transition from the non- pitchable portion to the pitchable portion.
  • the non-pitchable portion can be formed as a protrusion protruding from the rotor hub. Furthermore, the non-pitchable portion is suitably shaped so as to accommodate the pitch bearing arrangement of the blade pitch system. As already described above, the pitch bearing arrangement has a pitch shaft and two or more bearings provided on the pitch shaft. By supporting the bearings against the non-pitchable portion, the pitch shaft is rotatably supported on the non-pitchable portion. Accordingly, the non-pitchable portion can provide a suitable support structure for the two or more bearings.
  • the blade comprises the non-pitchable portion and the non-pitchable portion can be adapted to accommodate the pitch shaft.
  • accommodating the pitch shaft shall mean that at least a part of the pitch shaft is accommodated in the non-pitchable portion. It is not necessary, that the non-pitchable portion accommodates the whole pitch shaft. Consequently, arrangements are possible in which a portion of the pitch shaft protrudes into the rotor hub, for instance. Accordingly, the non-pitchable portion can enlarge an installation space for the pitch shaft. Since the installation space in the rotor hub is restricted, the use of such a non- pitchable portion as described above can provide for the advantage that a longer pitch shaft as well as additional bearings can be accommodated so that a more reliable bearing arrangement is achieved.
  • the pitch shaft is preferably hollow.
  • the pitch shaft may have a tubular shape.
  • the two or more bearings are spaced from each other in the axial direction of the pitch shaft.
  • a substantial axial distance between at least two of the two or more bearings is provided.
  • the axial distance between at least two of the two or more bearings can be multiple times, preferably more than four times, the width of one of the bearings.
  • Such an access hole provides an easy access to a space between the outer periphery of the pitch shaft and an inner periphery of the non-pitchable portion for technicians for the purpose of maintenance. Accordingly, the bearings are spaced such that further beneficial features, such as an access hole, can be realized axially between the bearings.
  • the pitchable portion is connected to the first end of the pitch shaft so as to be integrally rotatable therewith.
  • a connection can be provided for example by a nut and bolt connection or can also be a welded connection.
  • the first end of the pitch shaft can be specifically formed in order to facilitate the connection with the pitchable portion of the blade.
  • the first end of the pitch shaft can comprise a flange, welded thereon or integrally formed therewith for instance, on which the pitchable portion can be mounted. This flange preferably comprises a shape following the outer contour of the pitchable portion of the blade.
  • the wind turbine rotor further comprises a drive mechanism arranged for applying a rotational force on said pitch shaft at a second end of said pitch shaft opposite to said first end of said pitch shaft, wherein said drive mechanism is a direct drive mechanism comprising a stator and a rotor, wherein said rotor of said direct drive mechanism is coupled to said second end of said pitch shaft so as to integrally rotate therewith.
  • said drive mechanism is a direct drive mechanism comprising a stator and a rotor, wherein said rotor of said direct drive mechanism is coupled to said second end of said pitch shaft so as to integrally rotate therewith.
  • the drive mechanism is arranged in such a manner that the rotational force is applied on the pitch shaft at the second end of the pitch shaft. Therefore, a force application on the pitch shaft is effected at the second end.
  • the rotor can be coupled to the pitch shaft at the axial end of the pitch shaft.
  • the rotor of the direct drive mechanism can also be arranged about the pitch shaft at the second end of the pitch shaft.
  • the drive rotor can be arranged coaxially to the pitch shaft on the outer circumference of the pitch shaft.
  • the direct drive rotor comprises a magnet arrangement.
  • the magnet arrangement can be mounted directly on the outer surface of the pitch shaft. Furthermore, an arrangement is possible in which the magnet arrangement is mounted on the outer circumference of the pitch shaft between two of the two or more bearings. Accordingly, a driving force generated in the magnet arrangement is directly transferred to the pitch shaft. Therefore, additional elements for applying the force on the pitch shaft are not necessary so that the overall number of parts is reduced.
  • the one or more bearings of said two or more bearings are a fixed bearing and another one of said two or more bearings is a loose bearing.
  • a certain movement of the pitch shaft in the axial direction is possible at a position, where the pitch shaft is supported by a loose bearing.
  • the pitch shaft is axially movably supported by the loose bearing and is axially non-movably supported by the fixed bearing. Consequently, the loose bearing allows for a movement of the pitch shaft with respect to a non-rotatable portion, at which the loose bearing is supported, the non-pitchable portion for instance.
  • the one or more loose bearings are provided at the first end of the pitch shaft and the one or more fixed bearings are provided on a second end of the pitch shaft opposite to the first end.
  • the one or more fixed bearings are provided at the end of the pitch shaft at which the pitch shaft is not connected to the pitchable portion of the blade.
  • it is preferable that these bearings are arranged without a substantial axial distance between them, preferably as close to each other as possible.
  • the pitch shaft is supported in such a manner, that an axial movement of the first end of the pitch shaft with respect to the non-rotating part, the non-pitchable portion for instance, is possible whereas the second end of the pitch shaft opposite to the first end of the pitch shaft is supported in such a way that a movement of the second end of the pitch shaft in the axial direction of the pitch shaft relative to the non-pitchable portion is not possible.
  • the drive mechanism and the one or more fixed bearings are both provided at the second end of the pitch shaft, preferably in close proximity to each other. Thus, the distance between the drive mechanism and the one or more fixed bearings is small.
  • the pitch shaft Preferably, only one fixed bearing and one loose bearing are provided.
  • the drive mechanism is preferably provided closer to the fixed bearing than to the loose bearing. In other words, the distance between the drive mechanism and the fixed bearing is preferably smaller than the distance between the drive mechanism and the loose bearing.
  • the fixed bearings are provided on the same side of and in close proximity to the direct drive in case that two or more fixed bearings are provided.
  • all fixed bearings are provided on the same side of and near the magnet arrangement which is preferably positioned at the second end of the pitch shaft. Consequently, a movement of the pitch shaft in the direction of the direct drive can only take place over a very small or substantially no distance.
  • the magnet arrangement comprises a plurality of magnets arranged around the pitch shaft. This configuration has the following advantage. Since heat is generated in the direct drive mechanism so that the pitch shaft is heated, the pitch shaft is subjected to thermal expansion.
  • This configuration allows for a thermal expansion of the pitch shaft in directions facing away from the fixed bearing.
  • the pitch shaft is able to expand and to move relative to the loose bearing or bearings.
  • the bearing arrangement is relieved from loads acting on the bearings in the axial direction of the pitch shaft due to thermal expansion so that the functionality and reliability of the bearing is enhanced.
  • the fixed bearing is advantageously arranged in close proximity to the direct drive mechanism in so that only a small or substantially no portion of the pitch shaft is present between the fixed bearing and the drive mechanism.
  • a very small or substantially no thermal expansion of the pitch shaft will occur between the fixed bearing and the loose bearing so that the air gap remains approximately constant during operation thereby ensuring that the efficiency of the direct drive mechanisms remains optimal. Consequently, the generation of the driving force is maintained and a change of the gap which could result in less power generation is prevented.
  • the magnet arrangement comprises a plurality of magnets arranged about the pitch shaft. Consequently, it is possible to generate the rotating force directly on the pitch shaft.
  • the direct drive mechanism is a step motor.
  • the pitching of the pitchable portion of the blade can be effected reliably and vary accurate. Consequently, the pitchable portion can be positioned very accurately so that an optimum amount of lift force can be generated on the blade by accurately pitching the blade to establish an optimum angle of attack. Consequently, the efficiency of the wind turbine rotor is enhanced.
  • a drive mechanism for a blade pitch system comprising a drive rotor operatively connectable with a pitchable blade portion of a rotor blade of a wind turbine rotor and a drive stator fixedly mountable with respect to a rotor hub of said wind turbine is provided, wherein said drive mechanism is a direct drive mechanism.
  • the drive rotor is preferably coupled to a pitch shaft of the blade pitch system when the drive mechanism is mounted in a blade pitch system.
  • the drive mechanism further comprises a pitch shaft connectable to said pitchable blade portion at a first end and connectable to said drive rotor at a second end opposite to said first end, and two or more bearings provided on said pitch shaft for rotatably supporting said pitch shaft with respect to a non-pitchable blade portion, wherein said two or more bearings are spaced from each other in the axial direction of the pitch shaft. Consequently, forces generated due to generation of a bending moment on the rotor by the pitchable portion are received by the two or more bearings leading to a better load distribution and a reduction of a transfer of bending moments through the bearings. Consequently, the durability of the drive mechanism is enhanced.
  • the drive mechanism comprises a magnet arrangement provided on said drive rotor.
  • the magnet arrangement can comprise a plurality of magnets arranged about said drive rotor.
  • the direct drive mechanism can be constructed as a step motor. Consequently, the same beneficial effects as described above with respect to the wind turbine rotor comprising such a direct drive mechanism are achieved.
  • At least one of said two or more bearings of the drive mechanism for the blade pitch system is a fixed bearing and another one of said two or more bearings is a loose bearing.
  • at least one loose bearing it is possible to provide a certain axial movability of the pitch shaft at the bearing position where the loose bearing is provided. For example, in case the pitch shaft is enlarged due to thermal expansion, an axial movement of the pitch shaft is possible at the position where the loose bearing is provided. Accordingly, internal stresses due to a thermal expansion of the pitch shaft can be reduced or eliminated.
  • the at least one fixed bearing is provided at the second end of the pitch shaft which is opposite to the first end of the pitch shaft.
  • the first end of the pitch shaft is the end to which the pitchable portion of a blade is connectable. Consequently, a construction is achieved in which the fixed bearing, which does not allow for an axial movement of the pitch shaft, is provided at the second end of the pitch shaft thereby fixing the axial position of the pitch shaft. Consequently, in case a thermal expansion of the pitch shaft occurs, the portion of the pitch shaft at which the fixed bearing is provided remains non-movable in the axial direction. In other words, a thermal expansion of the pitch shaft does not result in a movement of the pitch shaft at the fixed bearing. Therefore, in case a pitchable portion of a blade is mounted to the first end, the pitchable blade portion is mounted in such a way, such that a thermal expansion of the pitch shaft leads to a small axial movement of the pitchable portion of the blade.
  • the drive mechanism is transmissionless, thereby allowing the rotational force generated in the drive mechanism to be directly applied on the pitch shaft at which the pitchable blade portion can be mounted. Since a further transmission is not necessary, the overall number of parts of the drive mechanism can be reduced.
  • the rotor In order to directly apply the rotational force on pitch shaft, the rotor can be connected to an axial end of the pitch shaft or can be arranged so as to extend about said pitch shaft.
  • a wind turbine rotor comprising a rotor hub, one or more blades mounted on the rotor hub, and a blade pitch system with a drive mechanism as described before. Furthermore, each blade comprises a non-pitchable portion and a pitchable portion and the drive stator is accommodated in the non-pitchable portion. The pitchable portion is operatively connected to the drive rotor so as to be rotatable with respect to the non-pitchable portion.
  • the drive mechanism of the wind turbine rotor is transmissionless. Consequently, the overall number of parts is reduced and the force can be directly generated at the pitch shaft. Therefore, the force is generated more efficiently.
  • a relative rotary movement between the drive rotor and the drive stator effects a change of a pitch of the pitchable blade portion with respect to the non-pitchable blade portion.
  • a wind turbine installation comprising a tower, a nacelle mounted on the tower and a wind turbine rotor as described before which is rotatably connected to a generator accommodated in the nacelle.
  • Figure 1 shows a partially cut out side view of a wind turbine comprising a wind turbine rotor and a drive mechanism for a blade pitch system according to an embodiment of the present subject matter.
  • Figure 2 illustrates a perspective view of a pitch shaft according to the embodiment of the present subject matter.
  • Figure 3 shows the pitch shaft of Figure 2 mounted on the rotor hub.
  • FIG. 1 shows a wind turbine 100 according to an embodiment of the present subject matter.
  • the wind turbine 100 comprises a rotor hub 104 on which multiple blades 102 are mounted.
  • the rotor hub 104 is rotatably supported on a nacelle 108.
  • the nacelle 108 is mounted on a tower (not shown).
  • the rotor hub 104 is operatively connected to a generator for generating electric energy.
  • the generator comprises a generator stator protruding from the nacelle and a generator rotor.
  • the generator rotor according to the embodiment is formed by an end portion of the rotor hub 104 which accommodates the generator stator therein.
  • the end portion of the rotor hub 104 is arranged around the generator stator and is coaxially mounted with respect to the generator stator so as to be rotatable about the same axis.
  • permanent magnets or actively excited coils are provided on the inner circumference of the generator rotor and generator coils are provided on the outer circumferential surface of the generator stator.
  • the generator rotor is rotatably supported with respect to the generator stator by means of a suitable bearing arrangement in order to maintain an air gap between the generator magnets and the generator coils.
  • each rotor blade 102 comprises a non- pitchable portion 102a and a pitchable portion 102b which is pitchable with respect to the non-pitchable portion 102a.
  • the non-pitchable portion 102a is fixedly attached to the rotor hub 104. Any suitable connection between the non-pitchable portion 102a and the rotor hub 104 may be used in order to provide a fixed attachment to the rotor hub 104.
  • the non- pitchable portion 102a can be coupled to the rotor hub 104 by use of a nut and bolt connection. It is, however, also possible to form the non-pitchable portion 102a integrally with the rotor hub 104.
  • the pitchable portion 102b is rotatably coupled to the non-pitchable portion
  • the pitch shaft 106 is fixedly connected to the pitchable portion 102b and is partially accommodated in the non-pitchable portion 102a.
  • the pitch shaft 106 is shown in Figure 2 in greater detail. As is shown in
  • the pitch shaft 106 comprises a cylindrical and tubular shape.
  • a flange 208 is integrally formed on one end of the pitch shaft 106, also referred to as the first end.
  • the outer circumference of the flange 208 is formed such that it follows the outer contour of the pitchable portion 102b of the blade 102.
  • the pitch shaft 106 has a cylindrical and tubular shape. Therefore, the remaining portion of the pitch shaft 106 besides the flange 208 is also referred to as cylindrical portion 202.
  • threaded holes are provided for connecting the pitch shaft 106 with a direct drive.
  • two bearings 204, 206 are provided on the outer circumferential surface of the cylindrical portion 202 of the pitch shaft 106 in order to rotatably support the pitch shaft.
  • the two bearings 204, 206 are spaced from each other in the axial direction of the pitch shaft 106. More precisely, one of the two bearings is provided at the end of the cylindrical portion 202 of the pitch shaft 106 where said flange 208 is formed, i.e. the first end of the pitch shaft 106.
  • This bearing 204 will also be referred to as first bearing 204 in the following.
  • the other one of the two bearings is provided on the cylindrical portion 202 at the opposite end of the cylindrical portion 202 of the pitch shaft 106, also referred to as second end of the pitch shaft 106.
  • This bearing 206 will also be referred to as second bearing 206 in the following.
  • an access hole 210 is provided in the pitch shaft 106.
  • the access hole 210 provides an easy access for technicians for the purpose of maintenance.
  • the access hole 210 also provides a weight reduction for the pitch shaft 106.
  • the pitch shaft 106 is connected to a drive mechanism 110. More precisely, the second end of the pitch shaft 106 is coupled to the drive mechanism 110.
  • the pitch shaft 106 is connected to the pitchable portion 102b of the blade 102 via the flange 208.
  • the cylindrical portion 202 of the pitch shaft 106 is almost completely accommodated in the non-pi tchable portion 102a so that the non- pitchable portion 102a acts as a housing for the pitch shaft 106. In other words, only a small gap is formed between the flange 208 and the non-pi tchable portion 102a.
  • the first bearing 204 and the second bearing 206 provided on the cylindrical portion 202 of the pitch shaft 106 are mounted on the inner circumference of the non-pi tchable portion 102a so that the pitchable portion 102a is rotatably supported on the non-pitchable portion 102a.
  • the drive mechanism 110 is arranged for applying a rotary force on the pitch shaft 106.
  • the drive mechanism 110 is formed as direct drive and comprises a rotor and a stator.
  • a plurality of magnets (not shown) is provided in the rotor and coils are provided in the stator.
  • the magnets can be permanent magnets or excited magnets.
  • the stator is non- rotatably fixed at the non-pitchable portion 102b.
  • the rotor is connected to the second end of the pitch shaft 106 so that upon rotation of the rotor, the pitch shaft 106 integrally rotates therewith.
  • the air gap between drive rotor and drive stator has to be maintained constant. In other words, any changes in the air gap or a deformation in the shape of the direct drive mechanism would affect its functioning. Therefore, the direct drive mechanism is in close proximity to the second bearing 206 so that the air gap is reliably maintained.
  • the temperature of the direct drive mechanism tends to rise. This is due to the fact that the direct drive mechanism generates heat and is in continuous operation. As a result, the pitch shaft 106 is heated and expands.
  • the second bearing 206 and the first bearing 204 are arranged such that the pitch shaft 106 is not fixed axially between the two bearing points but is only fixed at one of the bearings. More precisely, according to the embodiment, the second bearing 206 is fixedly attached to the pitch shaft 106 and the non-pi tchable portion thereby axially fixing the pitch shaft 106.
  • the first bearing 204 is provided as a loose bearing allowing for a motion of the pitch shaft 106 in the axial direction.
  • a loose bearing can be realized in different ways.
  • the bearing can be loosely mounted on the inner circumference of the non-pitchable portion and fixedly mounted on the pitch shaft 106.
  • the bearing is movably supported on the non-pitchable portion.
  • the combination of a fixed bearing and a loose bearing results in a bearing which allows for an axial expansion of the pitch shaft 106. Consequently, the pitch shaft 106 is not susceptible to any stresses that might build up due to the expansion of the pitch shaft 106. Consequently, the system comprises an enhanced durability. Futhermore, since the second bearing 206 is provided at the second end of the pitch shaft 106, only a small portion of the pitch shaft 106 is located between the second bearing 206 and the direct drive mechanism 110. Consequently, the direct drive mechanism 110 is positioned close to the second bearing 206, i.e. the fixed bearing according to the embodiment, so that a thermal expansion of the pitch shaft between the second bearing 206 and the direct drive is very small or does substantially not occur.
  • the one or more loose bearings are provided at the first end of the pitch shaft and the one or more fixed bearings are provided on the second end of the pitch shaft. Furthermore, an axial bearing is provided at the second end of the pitch shaft 106. It is, however, also possible to use one or more fixed bearings as radial bearings constructed so as to be able to receive the axial loads thereby eliminating the need for an additional axial bearing at the second end of the pitch shaft.
  • the pitch shaft in such a manner that the pitch shaft 106 is axially supported with respect to the non-pitchable portion at the first end.
  • an axial bearing could be mounted on the flange 208 thereby rotatably supporting the same. Consequently, in case a thermal expansion of the pitch shaft 106 occurs, the second end of the pitch shaft would be axially displaced and a gap between the flange 208 and the non-pitchable portion would be maintained.
  • the drive mechanism 110 is provided on a side of the second bearing 206 opposite to the side on which the first bearing 204 is located.
  • the drive mechanism 110 is arranged adjacent the pitch shaft 106 in the axial direction of the pitch shaft.
  • the drive rotor on the outer circumference of the cylindrical portion 202 of the pitch shaft 106 and to provide coils on the inner circumferential surface of the non-pitchable portion 102a.
  • the magnets can be provided on the outer circumference of the cylindrical portion 202 to form a direct drive rotor. Consequently, the direct drive mechanism 110 can also be realized as a drive means in which the pitch shaft 106 forms the output element of the drive mechanism as long as the drive rotor is provided in close proximity to the second bearing 206.

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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)
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  • Wind Motors (AREA)

Abstract

La présente invention concerne un rotor de turbine éolienne qui comprend un moyeu de rotor, une ou plusieurs pales montées sur le moyeu de rotor, chaque pale comprenant une partie à pas non variable et une partie à pas variable, ainsi qu'un système de pas de pale possédant un agencement d'articulation de pas. L'agencement d'articulation de pas possède un arbre de pas et deux articulations ou plus sur ledit arbre de pas. Les deux articulations ou plus sont espacées les unes des autres dans le sens axial de l'arbre de pas. La partie à pas variable est raccordée à une première extrémité de l'arbre de pas de façon à pouvoir tourner solidairement avec celui-ci.
PCT/EP2015/054050 2014-02-26 2015-02-26 Agencement d'articulation de pas pour générateur à turbine éolienne WO2015128426A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014203508.2 2014-02-26
DE102014203508.2A DE102014203508B9 (de) 2014-02-26 2014-02-26 Rotorblattlageranordnung für eine Windenergieanlage

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Publication Number Publication Date
WO2015128426A1 true WO2015128426A1 (fr) 2015-09-03

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EP3267032A1 (fr) * 2016-07-07 2018-01-10 Siemens Aktiengesellschaft Éolienne
US20180149139A1 (en) * 2016-11-29 2018-05-31 Siemens Aktiengesellschaft Wind turbine
CN109072869A (zh) * 2016-05-10 2018-12-21 乌本产权有限公司 风能设施转子叶片和具有风能设施转子叶片的风能设施
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
WO2023040417A1 (fr) * 2021-09-18 2023-03-23 西安热工研究院有限公司 Nouveau procédé de modélisation d'aube mobile pour la transformation écoénergétique d'un ventilateur à flux axial muni d'aubes mobiles réglables d'une centrale électrique

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DE102016119958A1 (de) 2016-10-20 2018-04-26 Wobben Properties Gmbh Verstelleinrichtung für ein Rotorblatt einer Windenergieanlage sowie eine Windenergieanlage damit und Verfahren dafür
DE102017004056A1 (de) * 2017-04-27 2018-10-31 Senvion Gmbh Blattadapter für Windenergieanlagen
EP3557045A1 (fr) * 2018-04-20 2019-10-23 youWINenergy GmbH Segment racine segmenté pour une pale de rotor d'une installation de turbine éolienne et pale d'un rotor segmenté avec le segment racine
DE102019112945A1 (de) 2019-05-16 2020-11-19 Wobben Properties Gmbh Windenergieanlage und Windenergieanlagen-Rotorblatt

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005019642A1 (fr) * 2003-08-21 2005-03-03 General Electric Company Changement de pas des pales d'une eolienne a l'aide d'un moteur pas a pas electrique
EP1900939A1 (fr) * 2005-06-13 2008-03-19 Gamesa Innovation And Technology, S.L. Turbine eolienne
US20100086409A1 (en) * 2008-10-08 2010-04-08 David Anthony Whiley Wind turbine rotor
US20110266806A1 (en) * 2010-04-28 2011-11-03 Mitsubishi Heavy Industries, Ltd. Direct-drive wind turbine generator and bearing structure
WO2013104779A1 (fr) * 2012-01-13 2013-07-18 youWINenergy GmbH Rotor d'éolienne

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10140793A1 (de) 2001-08-20 2003-03-06 Gen Electric Einrichtung zum Verstellen des Rotorblattes eines Rotors einer Windkraftanlage
DE102004046260B4 (de) 2004-09-23 2007-05-16 Nordex Energy Gmbh Verfahren zum Betreiben einer Vorrichtung zum Verstellen eines Blatteinstellwinkels sowie eine Verstellvorrichtung
DE102009017028B4 (de) 2009-04-14 2014-08-21 Siemens Aktiengesellschaft Windenergieanlage und Antriebseinrichtung zur Verstellung eines Rotorblatts
DE102009018361B4 (de) 2009-04-23 2013-03-14 Sew-Eurodrive Gmbh & Co. Kg Anordnung zur Pitchwinkel-Verstellung mindestens eines Rotorblatts und Maschine, insbesondere Windkraftanlage
DE102010005538A1 (de) 2010-01-23 2011-07-28 Schaeffler Technologies GmbH & Co. KG, 91074 Windenergieanlage mit einem oder mehreren Rotorblättern

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005019642A1 (fr) * 2003-08-21 2005-03-03 General Electric Company Changement de pas des pales d'une eolienne a l'aide d'un moteur pas a pas electrique
EP1900939A1 (fr) * 2005-06-13 2008-03-19 Gamesa Innovation And Technology, S.L. Turbine eolienne
US20100086409A1 (en) * 2008-10-08 2010-04-08 David Anthony Whiley Wind turbine rotor
US20110266806A1 (en) * 2010-04-28 2011-11-03 Mitsubishi Heavy Industries, Ltd. Direct-drive wind turbine generator and bearing structure
WO2013104779A1 (fr) * 2012-01-13 2013-07-18 youWINenergy GmbH Rotor d'éolienne

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10598159B2 (en) 2016-05-06 2020-03-24 General Electric Company Wind turbine bearings
CN109072869A (zh) * 2016-05-10 2018-12-21 乌本产权有限公司 风能设施转子叶片和具有风能设施转子叶片的风能设施
US10954923B2 (en) 2016-05-10 2021-03-23 Wobben Properties Gmbh Wind-turbine rotor blade, and wind turbine having same
US10502194B2 (en) 2016-05-27 2019-12-10 General Electric Company Wind turbine bearings
EP3267032A1 (fr) * 2016-07-07 2018-01-10 Siemens Aktiengesellschaft Éolienne
CN107587972A (zh) * 2016-07-07 2018-01-16 西门子公司 风力涡轮机
CN107587972B (zh) * 2016-07-07 2020-09-25 西门子歌美飒可再生能源公司 风力涡轮机
US20180149139A1 (en) * 2016-11-29 2018-05-31 Siemens Aktiengesellschaft Wind turbine
WO2023040417A1 (fr) * 2021-09-18 2023-03-23 西安热工研究院有限公司 Nouveau procédé de modélisation d'aube mobile pour la transformation écoénergétique d'un ventilateur à flux axial muni d'aubes mobiles réglables d'une centrale électrique

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