EP4476812A1 - Nacelle for a wind turbine - Google Patents

Nacelle for a wind turbine

Info

Publication number
EP4476812A1
EP4476812A1 EP23717534.4A EP23717534A EP4476812A1 EP 4476812 A1 EP4476812 A1 EP 4476812A1 EP 23717534 A EP23717534 A EP 23717534A EP 4476812 A1 EP4476812 A1 EP 4476812A1
Authority
EP
European Patent Office
Prior art keywords
bedframe
stator
nacelle
connecting device
electric generator
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP23717534.4A
Other languages
German (de)
French (fr)
Inventor
Simon Vyff Jensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Gamesa Renewable Energy AS
Original Assignee
Siemens Gamesa Renewable Energy AS
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 Siemens Gamesa Renewable Energy AS filed Critical Siemens Gamesa Renewable Energy AS
Publication of EP4476812A1 publication Critical patent/EP4476812A1/en
Pending legal-status Critical Current

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
    • F03D15/00—Transmission of mechanical power
    • F03D15/20—Gearless transmission, i.e. direct-drive
    • 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
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • 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
    • F05B2220/00—Application
    • F05B2220/70—Application in combination with
    • F05B2220/706—Application in combination with 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
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
    • 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 nacelle for a wind turbine and to a wind turbine including such nacelle .
  • a nacelle for a wind turbine typically comprises an electric generator having a rotor which rotates about a stator around a central rotational axis .
  • a permanent magnet electric generator is used, which has the generator rotor directly attached to the wind rotor and which rotates about the stator fixed to the structure of the nacelle by means of a fixed shaft .
  • the fixed shaft is becoming proportionally short compared with its increase in diameter . This is for example due to the ever-growing diameter of the generators . Due to the increasing diameter-length ratio , the fixed shaft is becoming an increasingly expensive component .
  • the obj ective may be changing boundary conditions of parts related to the fixed shaft . For example , one part which are becoming or could become an issue , is the number of bolts which are needed between the bedframe and the fixed shaft .
  • a nacelle for a wind turbine in particular a direct drive wind turbine , including more ef ficient and cost-ef fective constructional features for fixing the stator an electric generator to the nacelle .
  • a nacelle of a wind turbine including an electric generator and a bedframe .
  • the bedframe extends between a first bedframe end and a second bedframe end, the first bedframe end being configured for connecting the bedframe to a tower of the wind turbine , the second bedframe end being configured for connecting the bedframe to a rotor of the electric generator, wherein the bedframe includes at least one connecting device for connecting a stator of the electric generator to the bedframe between the first bedframe end and the second bedframe end .
  • the bedframe is a structural component of the nacelle , to which the stator is fixedly attached and to which the rotor is rotary attached by means of a bearing .
  • the bedframe permits the connection between the nacelle and the tower of the wind turbine .
  • the present invention permits to attach the stator directly to the bedframe between its first bedframe end second bedframe end, i . e . without using any stator shaft . This leads to a more simpli fied and cheaper construction with respect to the prior art .
  • the bedframe includes at least a first connecting device and a second connecting device for respectively connecting a first stator plate and a second stator plate of the stator .
  • the connecting devices may be shaped as flanges .
  • the electric generator comprises a rotational axis .
  • the first connecting device and the second connecting device may be distanced along the rotational axis of the electric generator, so that a first connecting device may be used for fixing a first drive end plate of the stator and a second connecting device may be used for fixing a second non-drive end plate of the stator
  • the first stator plate and/or the second stator plate respectively comprise respective pluralities of first and second circular sectors .
  • each stator module comprising a respective first circular sector and a respective second circular sector .
  • the respective first and second circular sectors of each stator module are distanced along the rotational axis .
  • This modular construction of the stator may result in a further reduction of construction costs , in particular regarding the number of hours needed for assembling the stator on the nacelle .
  • Each stator module may an angular extension about the rotational axis comprised between 20 and 90 degrees .
  • six stator modules may be used each having an angular extension about the rotational axis of 60 degrees .
  • eight stator modules may be used each having an angular extension about the rotational axis of 45 degrees .
  • At least one stator module comprises a cooling fan between the respective first circular sector and second circular sector .
  • At least one of the respective first and second circular sectors may comprise at least one cooling inlet and/or at least one cooling outlet .
  • the cooling fan may be fixed to the respective first circular sector and second circular sector .
  • the above-described nacelle may be implemented in a direct drive wind turbine .
  • Fig . 1 shows a schematic section of a wind turbine including a nacelle having a bedframe and a generator according to the present invention .
  • Fig . 2 shows a longitudinal sectional view of a nacelle according to the present invention .
  • Fig . 3 shows another longitudinal sectional view showing magni fied components of the nacelle in Fig . 2 .
  • Fig . 4 shows a partial axonometric view of a nacelle according to the present invention .
  • Fig . 5 shows another partial axonometric view showing magnified components of the nacelle in Fig . 4 .
  • Figure 1 shows a partial cross-sectional view of a wind turbine 1 .
  • the wind turbine 1 comprises a tower 12 , which is mounted on a foundation .
  • a nacelle 11 is rotatably mounted on top of the tower 11 .
  • the nacelle 11 includes an electric generator 15 .
  • the electric generator 10 may be a permanent magnet electric generator .
  • the wind turbine 1 further comprises at least a wind rotor 5 having a hub and at least one blade 4 ( in the embodiment of Figure 1 , the wind rotor comprises three blades 4 , of which only two blades 4 are visible ) .
  • the wind rotor 5 is rotatable about a longitudinal rotational axis Y .
  • the terms axial , radial and circumferential in the following are to be intended with reference to the rotational axis Y of rotation of the electric generator 15 .
  • the blades 4 extend substantially radially with respect to the rotational axis Y .
  • the wind rotor 5 provides the torque input , which is transmitted to the electric generator 15 .
  • the electric generator 15 includes a stator 20 and a rotor 30 .
  • the rotor 30 is rotatable with respect to the stator 20 about the rotational axis Y .
  • the wind rotor 5 is solidly coupled with the rotor 30 .
  • the wind rotor 5 rotates together with the rotor 30 , so that the power from the wind that impinges the blades 4 is transmitted to the electric generator 15 , for the generation of electric power .
  • the nacelle 11 further includes a bedframe 40 extending between a first bedframe end 41 and a second bedframe end 42 .
  • the first bedframe end 41 is configured for connecting the bedframe 40 to the tower 12 , so that the nacelle 11 can be rotated about a yaw axis .
  • the second bedframe end 42 is configured for connecting the bedframe 40 to the rotor 30 , so that the rotor 30 can rotate about the rotational axis Y .
  • Figures 2 and 3 show an embodiment of the nacelle 11 , illustrating the coupling between the bedframe 40 and the electric generator 15 .
  • the first bedframe end 41 provides an interface for connecting the bedframe 40 to the tower 12 .
  • the first bedframe end 41 is connectable with a rotation mechanism (not shown in the attached figures ) which is active on the bedframe 40 for rotating the nacelle 11 about the yaw axis .
  • a bearing 47 may be mounted for providing a rotatable connection between the bedframe 40 and the rotor 30 .
  • the bearing 47 extends between two axial ends 47a, 47b .
  • the rotor 30 is connected to the bearing 47 by means of two rotor plates 31 , 32 , which are respectively connected to the two axial ends 47a, 47b of the bearing 47 .
  • the bedframe 40 includes at least one connecting device for connecting the stator 20 of to the bedframe 40 between the first bedframe end 41 and the second bedframe end 42 .
  • the bedframe 40 comprises a first connecting device 43 and a second connecting device 44 , the first connecting device 43 and the second connecting device 44 being distanced along the rotational axis Y .
  • the first connecting device 43 is closer to the first bedframe end 41 than the second connecting device 43 .
  • the first connecting device 43 is therefore also closer to the drive end of the electric generator 15 than the second connecting device 43 , the drive end of the electric generator 15 being defined as the axial end of the electric generator 15 , which is closer to the wind rotor 5 .
  • the connecting devices 43 , 44 may be shaped as respective flanges , radially protruding from a main body of the bedframe 40 .
  • the stator 20 may comprise a first stator plate 21 and a second stator plate 22 respectively connected to the first connecting device 43 and the second connecting device 44 .
  • the first stator plate 21 and the second stator plate 22 have an annular shape about the rotational axis Y .
  • the first stator plate 21 and the second stator plate 22 may be planar or cylindrical .
  • the stator plates 21 , 22 may be respectively attached to the connecting devices 43 , 44 by means of respective connections .
  • Such connections may be bolted connections or welded connections .
  • the bedframe 40 provides a structural connection between the tower 12 and the electric generator 15 , through the coupling between the rotor 30 and the bearing 47 at the second bedframe end 42 and the coupling between the stator 20 and the connecting devices 43 , 44 .
  • Figures 4 and 5 show an embodiment of the nacelle 11 , illustrating details of the stator 20 .
  • the first stator plate 21 and the second stator plate 22 comprise respective pluralities of first and second circular sectors 26 , 27 .
  • the stator 20 comprises a plurality of stator modules 25 , each module 25 comprising one respective first circular sector 26 and one respective second circular sector 27 distanced along the rotational axis Y .
  • Each stator module 25 is hollow and includes an inner volume 23 .
  • the stator 20 comprises eight stator modules 25 , each stator module 25 having an angular extension of 45 degrees .
  • each stator module 25 may have an angular extension about the rotational axis Y, which is comprised between 20 and 90 degrees .
  • the stator 20 may comprise six stator modules 25 , each stator module 25 having an angular extension of 60 degrees .
  • At least one stator module 25 may comprise a cooling fan 50 between the respective first circular sector 26 and second circular sector 27 .
  • stator module 25 may comprise a cooling fan 50 between the respective first circular sector 26 and second circular sector 27 .
  • the cooling fan 50 provides air circulation in the inner volume 23 for cooling the stator 20 .
  • at least one of the respective first and second circular sectors 26 , 27 may comprise at least one cooling inlet 28 and/or one cooling outlet 29 , for respectively letting colling air circulate to and from the inner volume 23 .
  • the cooling inlet ( s ) 28 may be connected with an inlet of the cooling fan 50 .
  • the cooling outlet ( s ) 29 may be connected with an outlet of the cooling fan 50 .
  • the cooling fan 50 may be fixed to the respective first circular sector 26 and second circular sector 27 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

It is disclosed a bedframe (40) for a nacelle (11) of a wind turbine (1), the nacelle (11) including an electric generator (15). The bedframe (40) extends between a first bedframe end (41) and a second bedframe end (42), the first bedframe end (41) being configured for connecting the bedframe (40) to a tower (12) of the wind turbine (1), the second bedframe end (42) being configured for connecting the bedframe (40) to a rotor (30) of the electric generator (15). The bedframe (40) includes at least one connecting device (43, 44) for connecting a stator (20) of the electric generator (15) to the bedframe (40) between the first bedframe end (41) and the second bedframe end (42).

Description

DESCRIPTION
Nacelle for a wind turbine
Field of invention
The present invention relates to a nacelle for a wind turbine and to a wind turbine including such nacelle .
Art Background
A nacelle for a wind turbine typically comprises an electric generator having a rotor which rotates about a stator around a central rotational axis . In direct drive wind turbines , a permanent magnet electric generator is used, which has the generator rotor directly attached to the wind rotor and which rotates about the stator fixed to the structure of the nacelle by means of a fixed shaft .
During the development phase of of fshore direct drive turbine of the greatest dimensions it have been identi fied that the fixed shaft is becoming proportionally short compared with its increase in diameter . This is for example due to the ever-growing diameter of the generators . Due to the increasing diameter-length ratio , the fixed shaft is becoming an increasingly expensive component . The obj ective may be changing boundary conditions of parts related to the fixed shaft . For example , one part which are becoming or could become an issue , is the number of bolts which are needed between the bedframe and the fixed shaft .
It is therefore desirable to provide a nacelle for a wind turbine , in particular a direct drive wind turbine , including more ef ficient and cost-ef fective constructional features for fixing the stator an electric generator to the nacelle . Summary of the Invention
This obj ective may be solved according to the independent claims . Advantageous embodiments of the present invention are described by the dependent claims .
According to a first aspect of the present invention, a nacelle of a wind turbine is provided, the nacelle including an electric generator and a bedframe . The bedframe extends between a first bedframe end and a second bedframe end, the first bedframe end being configured for connecting the bedframe to a tower of the wind turbine , the second bedframe end being configured for connecting the bedframe to a rotor of the electric generator, wherein the bedframe includes at least one connecting device for connecting a stator of the electric generator to the bedframe between the first bedframe end and the second bedframe end .
The bedframe is a structural component of the nacelle , to which the stator is fixedly attached and to which the rotor is rotary attached by means of a bearing . The bedframe permits the connection between the nacelle and the tower of the wind turbine .
The present invention permits to attach the stator directly to the bedframe between its first bedframe end second bedframe end, i . e . without using any stator shaft . This leads to a more simpli fied and cheaper construction with respect to the prior art .
According to the present invention, the bedframe includes at least a first connecting device and a second connecting device for respectively connecting a first stator plate and a second stator plate of the stator . The connecting devices may be shaped as flanges . The electric generator comprises a rotational axis . The first connecting device and the second connecting device may be distanced along the rotational axis of the electric generator, so that a first connecting device may be used for fixing a first drive end plate of the stator and a second connecting device may be used for fixing a second non-drive end plate of the stator
According to the present invention, the first stator plate and/or the second stator plate respectively comprise respective pluralities of first and second circular sectors .
By using the pluralities of first and second circular sectors a plurality of stator modules are formed, each stator module comprising a respective first circular sector and a respective second circular sector . The respective first and second circular sectors of each stator module are distanced along the rotational axis . This modular construction of the stator may result in a further reduction of construction costs , in particular regarding the number of hours needed for assembling the stator on the nacelle . Each stator module may an angular extension about the rotational axis comprised between 20 and 90 degrees . According to one embodiment of the present invention, six stator modules may be used each having an angular extension about the rotational axis of 60 degrees . According to another embodiment of the present invention, eight stator modules may be used each having an angular extension about the rotational axis of 45 degrees .
According to the present invention, at least one stator module comprises a cooling fan between the respective first circular sector and second circular sector . At least one of the respective first and second circular sectors may comprise at least one cooling inlet and/or at least one cooling outlet . The cooling fan may be fixed to the respective first circular sector and second circular sector . According to a third aspect of the present invention, the above-described nacelle may be implemented in a direct drive wind turbine .
Brief Description of the Drawings
The above-defined aspects and further aspects of the present invention are apparent from the examples of embodiment to be described hereinafter and are explained with reference to the examples of embodiment . The invention will be described in more detail hereinafter with reference to examples of embodiment but to which the invention is not limited .
Fig . 1 shows a schematic section of a wind turbine including a nacelle having a bedframe and a generator according to the present invention .
Fig . 2 shows a longitudinal sectional view of a nacelle according to the present invention .
Fig . 3 shows another longitudinal sectional view showing magni fied components of the nacelle in Fig . 2 .
Fig . 4 shows a partial axonometric view of a nacelle according to the present invention .
Fig . 5 shows another partial axonometric view showing magnified components of the nacelle in Fig . 4 .
Detailed Description
The illustrations in the drawings are schematically . It is noted that in di f ferent figures , similar or identical elements are provided with the same reference signs . Figure 1 shows a partial cross-sectional view of a wind turbine 1 . The wind turbine 1 comprises a tower 12 , which is mounted on a foundation . A nacelle 11 is rotatably mounted on top of the tower 11 . The nacelle 11 includes an electric generator 15 . The electric generator 10 may be a permanent magnet electric generator . The wind turbine 1 further comprises at least a wind rotor 5 having a hub and at least one blade 4 ( in the embodiment of Figure 1 , the wind rotor comprises three blades 4 , of which only two blades 4 are visible ) . The wind rotor 5 is rotatable about a longitudinal rotational axis Y . The terms axial , radial and circumferential in the following are to be intended with reference to the rotational axis Y of rotation of the electric generator 15 . The blades 4 extend substantially radially with respect to the rotational axis Y . The wind rotor 5 provides the torque input , which is transmitted to the electric generator 15 . The electric generator 15 includes a stator 20 and a rotor 30 . The rotor 30 is rotatable with respect to the stator 20 about the rotational axis Y . The wind rotor 5 is solidly coupled with the rotor 30 . The wind rotor 5 rotates together with the rotor 30 , so that the power from the wind that impinges the blades 4 is transmitted to the electric generator 15 , for the generation of electric power .
The nacelle 11 further includes a bedframe 40 extending between a first bedframe end 41 and a second bedframe end 42 . The first bedframe end 41 is configured for connecting the bedframe 40 to the tower 12 , so that the nacelle 11 can be rotated about a yaw axis . The second bedframe end 42 is configured for connecting the bedframe 40 to the rotor 30 , so that the rotor 30 can rotate about the rotational axis Y .
Figures 2 and 3 show an embodiment of the nacelle 11 , illustrating the coupling between the bedframe 40 and the electric generator 15 . The first bedframe end 41 provides an interface for connecting the bedframe 40 to the tower 12 . The first bedframe end 41 is connectable with a rotation mechanism (not shown in the attached figures ) which is active on the bedframe 40 for rotating the nacelle 11 about the yaw axis . At the second bedframe end 42 a bearing 47 may be mounted for providing a rotatable connection between the bedframe 40 and the rotor 30 . The bearing 47 extends between two axial ends 47a, 47b . The rotor 30 is connected to the bearing 47 by means of two rotor plates 31 , 32 , which are respectively connected to the two axial ends 47a, 47b of the bearing 47 . The bedframe 40 includes at least one connecting device for connecting the stator 20 of to the bedframe 40 between the first bedframe end 41 and the second bedframe end 42 . In the embodiment of figures 2 and 3 , the bedframe 40 comprises a first connecting device 43 and a second connecting device 44 , the first connecting device 43 and the second connecting device 44 being distanced along the rotational axis Y . The first connecting device 43 is closer to the first bedframe end 41 than the second connecting device 43 . The first connecting device 43 is therefore also closer to the drive end of the electric generator 15 than the second connecting device 43 , the drive end of the electric generator 15 being defined as the axial end of the electric generator 15 , which is closer to the wind rotor 5 . The connecting devices 43 , 44 may be shaped as respective flanges , radially protruding from a main body of the bedframe 40 . The stator 20 may comprise a first stator plate 21 and a second stator plate 22 respectively connected to the first connecting device 43 and the second connecting device 44 . The first stator plate 21 and the second stator plate 22 have an annular shape about the rotational axis Y . According to di f ferent embodiment of the invention, the first stator plate 21 and the second stator plate 22 may be planar or cylindrical . The stator plates 21 , 22 may be respectively attached to the connecting devices 43 , 44 by means of respective connections . Such connections may be bolted connections or welded connections .
The bedframe 40 provides a structural connection between the tower 12 and the electric generator 15 , through the coupling between the rotor 30 and the bearing 47 at the second bedframe end 42 and the coupling between the stator 20 and the connecting devices 43 , 44 .
Figures 4 and 5 show an embodiment of the nacelle 11 , illustrating details of the stator 20 . The first stator plate 21 and the second stator plate 22 comprise respective pluralities of first and second circular sectors 26 , 27 .
The stator 20 comprises a plurality of stator modules 25 , each module 25 comprising one respective first circular sector 26 and one respective second circular sector 27 distanced along the rotational axis Y . Each stator module 25 is hollow and includes an inner volume 23 . In the embodiment of the attached figures , the stator 20 comprises eight stator modules 25 , each stator module 25 having an angular extension of 45 degrees . According to other embodiments (not shown) of the present invention, each stator module 25 may have an angular extension about the rotational axis Y, which is comprised between 20 and 90 degrees . For example , the stator 20 may comprise six stator modules 25 , each stator module 25 having an angular extension of 60 degrees . At least one stator module 25 may comprise a cooling fan 50 between the respective first circular sector 26 and second circular sector 27 . According to embodiments of the present invention, stator module 25 may comprise a cooling fan 50 between the respective first circular sector 26 and second circular sector 27 . The cooling fan 50 provides air circulation in the inner volume 23 for cooling the stator 20 . In each stator module 25 , at least one of the respective first and second circular sectors 26 , 27 may comprise at least one cooling inlet 28 and/or one cooling outlet 29 , for respectively letting colling air circulate to and from the inner volume 23 . The cooling inlet ( s ) 28 may be connected with an inlet of the cooling fan 50 . The cooling outlet ( s ) 29 may be connected with an outlet of the cooling fan 50 . The cooling fan 50 may be fixed to the respective first circular sector 26 and second circular sector 27 .

Claims

1. A nacelle (11) of a wind turbine (1) including an electric generator (15) and a bedframe (40) , the bedframe (40) extending between a first bedframe end (41) and a second bedframe end (42) , the first bedframe end (41) being configured for connecting the bedframe (40) to a tower (12) of the wind turbine (1) , the second bedframe end (42) being configured for connecting the bedframe (40) to a rotor (30) of the electric generator (15) , wherein the bedframe (40) includes at least one connecting device (43, 44) for connecting a stator (20) of the electric generator (15) to the bedframe (40) between the first bedframe end (41) and the second bedframe end ( 42 ) , wherein the bedframe (40) includes at least a first connecting device (43) and a second connecting device (43) for respectively connecting a first stator plate (21) and a second stator plate (22) of the stator (20) , wherein the first stator plate (21) and/or the second stator plate (22) comprise respective pluralities of first and second circular sectors (26, 27) , wherein the stator (20) comprises a plurality of stator modules (25) , each module (25) comprising a respective first circular sector (26) and a respective second circular sector (27) , the respective first and second circular sectors (26, 27) being distanced along the rotational axis (Y) , wherein at least one stator module (25) comprises a cooling fan (50) between the respective first circular sector (26) and second circular sector (27) .
2. The nacelle (11) according to claim 1, wherein the at least one connecting device (43, 44) is shaped as a flange.
3. The nacelle (11) according to claim 2, wherein the stator (20) is connected to the at least one connecting device (43, 44) by means of a bolted or a welded connection.
4. The nacelle (11) according to any of claims 1 to 3, wherein the first connecting device (43) and the second connecting device (44) are distanced along a rotational axis (Y) of the electric generator (15) , the first connecting device (43) being closer to the first bedframe end (41) than the second connecting device (44) .
5. The nacelle (11) according to any of claims 1 to 4, wherein at least one of the respective first and second circular sectors (26, 27) comprises at least one cooling inlet
(28) .
6. The nacelle (11) according to any of claims 1 to 5, wherein at least one of the respective first and second circular sectors (26, 27) comprises at least one cooling outlet
(29) .
7. The nacelle (11) according to any of the claims 1 to 6, wherein each stator module (25) has an angular extension about the rotational axis (Y) comprised between 20 and 90 degrees .
8. A wind turbine (1) including the nacelle (11) according to any of the previous claims.
EP23717534.4A 2022-04-12 2023-04-06 Nacelle for a wind turbine Pending EP4476812A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22167748.7A EP4262056A1 (en) 2022-04-12 2022-04-12 Nacelle for a wind turbine
PCT/EP2023/059193 WO2023198610A1 (en) 2022-04-12 2023-04-06 Nacelle for a wind turbine

Publications (1)

Publication Number Publication Date
EP4476812A1 true EP4476812A1 (en) 2024-12-18

Family

ID=81307298

Family Applications (2)

Application Number Title Priority Date Filing Date
EP22167748.7A Withdrawn EP4262056A1 (en) 2022-04-12 2022-04-12 Nacelle for a wind turbine
EP23717534.4A Pending EP4476812A1 (en) 2022-04-12 2023-04-06 Nacelle for a wind turbine

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP22167748.7A Withdrawn EP4262056A1 (en) 2022-04-12 2022-04-12 Nacelle for a wind turbine

Country Status (4)

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EP (2) EP4262056A1 (en)
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EP2492503B1 (en) * 2011-02-25 2018-01-03 Siemens Aktiengesellschaft A wind turbine with a generator
JP5834433B2 (en) * 2011-03-18 2015-12-24 株式会社明電舎 Outer rotor type rotating electrical machine
CN203193407U (en) * 2013-04-02 2013-09-11 中国第一重型机械股份公司 An assembled rotor and stator device for a wind power generator
DE102015212452A1 (en) * 2015-07-02 2017-01-05 Wobben Properties Gmbh Carrier element, in particular stator carrier element and / or rotor carrier element, system of carrier elements, generator carrier, generator, generator support system, nacelle of a wind turbine, wind turbine and method for mounting a generator support system
EP3273578B1 (en) * 2016-07-21 2020-06-03 Siemens Aktiengesellschaft Cooling arrangement of a wind turbine generator
CN110445307B (en) * 2019-08-14 2021-01-29 上海电气风电集团股份有限公司 Stator segment, stator assembly and cooling system of stator assembly

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KR20240001780U (en) 2024-10-29
CN223625645U (en) 2025-12-02
WO2023198610A1 (en) 2023-10-19

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