DE102014115928A1 - Vertical wind turbine with joint in rotor shaft - Google Patents

Abstract

In a wind turbine with a vertical axis of rotation, a flexible joint 10, preferably a claw coupling with rubber buffer or an elastomer coupling, is provided on the rotor shaft 17 between the generator 1 and the rotor blades 5 carrying the upper rotor section 15, the deflection of the rotor shaft 17 in the upper rotor section 15th relative to the vertical by a predetermined angular range permits. This allows for a less massive design of the rotor attachment because the upper rotor section 15 and the associated areas 13 of the entire turbine no longer have to rigidly withstand the wind forces acting laterally, but these forces in part through the flexible hinge 10 and the lateral deflection of the upper rotor section 15 can be recorded.

Description

Wind turbines with vertical, that is substantially transverse to a horizontal wind direction axis of rotation are preferably operated as a single small systems in the range of 0.5 to 5 kW and above. They include a stator with stator blades and a rotor with rotor blades, rotor and stator together also referred to as a turbine. The rotor drives a generator to generate electrical energy. The search is generally for solutions that enable a cost-effective, lightweight yet robust design of the wind turbine.

The still unpublished utility model application DE 20 2013 105 475.5 already shows a comparatively lightweight and inexpensive to produce construction of the stator by specially shaped stator blade holder. These are essentially produced from a piece of sheet metal and have a trapezoidal in the side view basic shape. However, in this conventional approach, it is still believed that the stator and rotor together form a self-supporting and stable turbine design to then drive a generator disposed separately therefrom. As will be seen below, there is room for improvement in this point.

In the publication GB 2 116 640 A discloses a vertical wind turbine in which the rotor blades or vanes are pivotally mounted to withstand laterally acting on the wind turbine forces in strong winds. In addition, it is generally known to equip the rotor bearings with rubber buffers to dampen transverse to the axis of rotation wind forces to some extent. It is also known to dampen the suspension of a generator on a support mast by suitable buffers to reduce transmission of vibrations of the generator to the mast and the mast-carrying building part (for example, a house roof). In the prior art, however, the rotor shaft and the rotor parts attached thereto or the stator elements rotatably mounted therefor are generally understood to be of a consistently rigid construction. As will be seen below, there is also room for improvement in this area.

The object of the present invention is to provide a wind turbine, which is lightweight and inexpensive to produce and their construction is still robust enough to withstand strong winds. The object is achieved by the wind power plant specified in the appended claim 1. The subclaims relate to preferred embodiments.

According to a first aspect of the present invention, the generator is no longer considered independent of the structure of the rest of the wind turbine, but used as a supporting structural element of the turbine. More specifically, at least one stator blade holder is attached directly to the housing of the generator. Because the generator is a relatively heavy and thus sustainable component due to the copper coils and permanent magnets therein, the mass of the generator can be usefully used to stabilize the Statorgrundgerüsts in this way. The stator can thus be made slimmer overall, without losing stability.

According to a second basic idea of the present invention, which can be realized in combination with the first basic idea, but also completely independent thereof, the rotor shaft is no longer designed as a consistently rigid structure, but above the generator a flexible joint introduced therein, which is an articulated Connects between an upper rotor portion and a generator driving the lower rotor section manufactures. The joint allows tilting of the rotor axis over a predetermined angular range while full torque transmission to the lower rotor section and thus to the generator. Due to the tilting of the rotor shaft, a part of the excess force acting on the side of the wind turbine is absorbed in strong winds, so that the support structure for the turbine as a whole does not have to be so strongly dimensioned.

The invention will be explained in more detail below with reference to an embodiment with reference to the accompanying drawings. It shows:

1 a schematic cross-sectional view of a bottom portion of the wind turbine according to the invention from the side;

2a a perspective view of a first stator blade according to the invention obliquely from above;

2 B a perspective view of the first stator blade holder obliquely from below;

2c a perspective view of a second stator blade according to the invention obliquely from above;

2d a perspective view of the second stator blade holder obliquely from below;

3 a perspective side view of the bottom portion of the wind turbine according to the invention;

4a a schematic cross-sectional view of the wind turbine according to the invention from the side; and

4b a schematic representation of the mobility of the wind turbine in a side view.

1 shows a fixable in the ground or on a building or the like mast 6 whose vertical end portion 3 has the shape of a flange. On this flange 3 lies the bottom plate 12 of the generator housing, which by means of screws 9 or other suitable fasteners flanged thereto. The generator 1 becomes centered on the axis of rotation 7 penetrated by the rotor shaft 17 rotates or is rotatably mounted. At the rotor shaft 17 are rotor arms 18 attached to the rotor blades 5 wear. Air flowing sideways onto the wind turbine is taken from the stator blades 4 , often referred to as baffles, so deflected that the rotor blades 5 regardless of the wind direction, a torque in one direction (here in the plan view clockwise) experience.

The stator blades 4 , which may be straight or curved (as shown), each resting on a stator blade holder 2 more precisely on its essentially horizontal base plate 21 , In addition, each stator blade holder has 2 at least one side wall 23 up, pointing to the axis of rotation 7 widens and thereby ensures a good transfer of the force vectors from the outer circumference of the stator to the arranged in the middle of the generator housing. Towards the middle, the side wall ends 23 in the end edge 26 , which rests against the side wall of the generator housing, and in a the ceiling plate 11 the generator housing overlapping projection 25 ,

Through boreholes 32a . 32b (please refer 2a -D) in the projection 25 and the ceiling tile 11 can be appropriate fasteners, such as screws 8th , bring in. A corresponding hole 34a (please refer 2a -D) is in a fold 24 the side wall 23 and serves for attachment to the bottom plate 12 by means of suitable fastening means, for example screws 9 , The attachment of the stator blade holder 2 on the generator housing is thus carried out essentially by screwing the projection 25 on the ceiling plate 11 , supporting the end edge 26 against the generator side wall and screwing on the fold 24 at the bottom plate 12 , This not only allows a particularly strong and sustainable connection between stator blade holder 2 and generator 1 , but also allows the derivation of the on the stator blade holder 2 acting forces on the much massive generator housing.

Above the generator 1 but below the rotor arms 18 has the rotor shaft 17 of the embodiment shown, the flexible joint 10 on. This preferably designed as a claw coupling with rubber buffer or elastomer coupling joint allows flexible tilting of the rotor shaft 17 with respect to the vertically oriented axis of rotation 7 , Details will be given later on the basis of 4a and 4b explained.

The 2a to 2d show details of the preferably used two kinds of stator blade holders 2 of the present invention. The 2a and 2 B show a first type of stator blade holder 2 and the 2c and 2d their second type. Preferably, the two types can be arranged alternately in the circumferential direction. The basic idea of the present invention can also be achieved with stator blade holders 2 which are all of the same type. This can be one of the two types used in the 2a to 2d can be seen, or a different design, as long as they have a reliable connection to the generator housing 1 or directly in connection with this housing stationary components. In the embodiment shown in the 3 You can see only stator blade holders 2 the first type used. But you could just as well use those of the second type.

The stator blade holder 2 is a total of one piece by multiple folding and cutting or drilling and punching made of a piece of sheet metal. The sheet is folded so that it is a substantially rectangular base plate 21a has, from the side edges U-shaped a short side wall 22a and a long sidewall 23a extend. On the base plate 21a are several mounting holes 31a for fixing the perpendicular to the base plate 21a oriented stator blades 4 available. In addition - as already mentioned above - are located at the radially inner end of the base plate 21a mounting holes 32a for fastening the projection 25a on the ceiling plate 11 by means of the fastening means 8th , At the radially outer end of the base plate 21a is also a mounting hole 33a present, for attaching a peripheral ring 19 serves, later on the basis of 3 is explained in more detail.

The first side wall 22a is substantially rectangular and provides only a short fold of the first side edge of the base plate 21a It mainly serves to stiffen the stator blade holder 2 against bending. The second side wall 23a is longer and has already in the 1 illustrated basic form of an isosceles trapezium. It serves to derive the carrying forces of the base plate 21a lying load in the direction of the axis of rotation 7 on the generator housing. The second Side wall 23a is at its lower end folded inwards again and here forms the substantially rectangular fold 24a , At the radially inner end of the fold 24a is - as already mentioned above - again a borehole 34a attached by which the fasteners 9 the stator blade holder 2 at the bottom plate 12 and the mast flange 3 can fix.

The in the 2c and 2d illustrated second type of stator blade holder 2 differs from the first type only in so far as the base plate 21b is not rectangular, but has essentially the basic shape of an isosceles trapezium. As a result, the two radially inner mounting holes lie 32b closer together than the corresponding mounting holes 32a , and the linear array of mounting holes 31b on the base plate 21b runs at a more acute angle to the radius of the overall structure of the wind turbine than the baying of the corresponding holes 31a the base plate 21a , All other elements of the stator blade holder 2 The second type correspond in shape and function to the corresponding elements in the first type, in particular the side walls 22b . 23b , the fold 24b and the holes 33b and 34b , The stator blade holder 2 can be arranged in its second type denser in the circumferential direction around the generator housing without the radially outer surface lying useful for attaching the stator blades 4 at the mounting holes 31b would be much smaller.

The function of the projections 25a and 25b as well as the end edge 26a and 26b consists, as already referring to 1 explains, in it, the generator housing with the projection 25 to overlap and with the radially inner end edge 26 the stator blade holder 2 to support against the cylindrical side wall of the generator housing. A similar support function takes over (although to a lesser extent) the radially inner end edge of the short side wall 22a . 22b , Overall, this creates a load-bearing and carrying forces well dissipating connection between the stator blade holder 2 and the generator 1 , The stator blade holder 2 so can hold the entire load of the stator and divert to the generator housing, although the stator blade holder 2 are formed from a simple piece of sheet metal and therefore can be easily and inexpensively manufactured.

The 3 again shows the overall structure in a perspective side view. Good to see are the stator blade holders 2 first type, which are arranged in a star shape around the substantially disc-shaped generator housing. According to a likewise preferred, but not shown, modification of the invention, the stator blade holders of the first and second types can be arranged alternately around the generator housing.

On the forefront two stator blade holders 2 are the base plates 21a without the stator blades attached to it 4 presented to allow a better insight into the interior of the wind turbine. On the base plates 21a but are the fasteners 20 (preferably screws) for attaching the stator blades 4 shown, so you can better imagine their attachment. In addition, in the circumferential direction around the radially outer ends of the stator blades 2 a ring 19 to be seen in the form of a hollow profile. This will be over the mounting holes 33a with the stator sheet holders 2 connected and ensures a reliable connection of the radially outer ends of the stator blade holder 2 , As a result, the entire construction is additionally stiffened.

In the 4a and 4b becomes the principle of the invention of the flexible joint 10 explained in more detail. The 4a agrees in its lower part with the one already described 1 but also shows the further course of the rotor shaft 17 , From this first extends another rotor arm 18 at which the rotor blade 5 is attached. The rotor shaft 17 finally ends with its axial end portion on the radial bearing 41 , At this is the rotor shaft 17 rotatably mounted with respect to the stator. Star-shaped from the radial bearing 41 outward struts 42 represent the upper end of the wind turbine. At the radially outer end of the struts 42 is in each case the upper end portion of the stator blades 4 attached.

The rotor shaft 17 runs from the radial bearing 41 up to her inside the generator 1 lying end, at which the torque to the internal rotor of the generator 1 is transmitted. The flexible joint 10 divides the rotor shaft in a relative to the vertical pivotable upper rotor portion 15 and a non-pivotable lower rotor section 16 , The deflection of the upper rotor section 17 with respect to the vertical results due to the connection of the rotor shaft 17 with the rotor blades 5 over the rotor arms 18 and the connection with the stator blades 4 over the radial bearing 41 and the ledges 42 also to a corresponding flexible tilting of a large area 13 the entire wind turbine. Like in the 4b better to see, only the area remains 14 the wind turbine rigidly fixed to the upper end portion of the mast 6 connected, so the generator 1 and the lower rotor section 16 , The rest of the area 13 is fundamentally flexible and can thus absorb peak loads due to sideways incoming strong winds. The rigid area 14 This can also be interpreted less massive, because he does not have to derive as strong counter forces, as in a rigid upper rotor section. It also makes the transmission of vibrations of the turbine to the mast 6 reduced.

The linkage of the stator has proved to be sufficiently flexible so far that a deflection of the rotor shaft 17 by a corresponding connection of the last 42 and stator blades 2 composite stator framework is also transmitted to the stator. This is in the 4b by the superposition of multiple stator positions in the flexible area 13 shown. In particular, the stator blades 4 are so elastic in themselves that they are a deflection of the upper rotor section 15 allow, without the attachment of the stator (especially the attachment of the stator blade holder 2 on the generator housing). In addition, but would also be considered, at the location of the fasteners 8th . 9 provide flexible fasteners, which provides even better flexibility of the flexible area 13 in relation to the rigid area 14 enable.

In summary, in a wind turbine with a vertical axis of rotation, the turbine composed of stator and rotor is fastened directly to the generator housing. This is preferably achieved in that the stator blades 4 carrying stator blade holder 2 directly on the housing of the generator 1 be attached. Thus, the mass of the relatively heavy generator construction can usefully be used to stabilize the stator. At the same time or alternatively, at the rotor shaft 17 between the generator 1 and the rotor blades 5 carrying upper rotor section 15 a flexible joint 10 , Preferably a jaw clutch with rubber buffer or an elastomer coupling, provided, which is a deflection of the rotor shaft 17 in the upper rotor section 15 relative to the vertical by a predetermined angular range permits. This allows a less massive design of the rotor attachment, because the upper rotor section 15 and the related areas 13 The entire turbine no longer has to withstand the side acting wind forces rigidly, but these forces partly through the flexible joint 10 and the lateral deflection of the upper rotor section 15 can be included.

• [1] Windkraftanlage mit einem Rotor, der drehbar um eine vertikale Drehachse (7) gelagert ist und mehrere Rotorflügel (5) aufweist, einem Stator mit mehreren feststehenden oder beweglichen Statorblättern (4), die auf wenigstens einem Statorblatthalter (2) angebracht und dazu ausgelegt sind, seitlich auf die Windkraftanlage einströmende Luft in Richtung der Rotorflügel (5) zu lenken, und einem Generator (1) zur Gewinnung elektrischer Energie aus der Drehung des Rotors um die Drehachse (7), wobei der Statorblatthalter (2) direkt am Gehäuse des Generators (1) befestigt ist.
• [2] Windkraftanlage nach [1], wobei der Generator (1) vom Innenläufer-Typ ist und vorzugsweise vollständig innerhalb des Stators und konzentrisch zu Rotor und Stator bezüglich der Drehachse (7) angeordnet ist.
• [3] Windkraftanlage nach [1] oder [2], wobei der Statorblatthalter (2) durch Befestigungsmittel (8, 9), insbesondere Schrauben, an einer Decken- und/oder Bodenplatte (11, 12) des Generatorgehäuses befestigt ist.
• [4] Windkraftanlage nach einem der Aspekte [1] bis [3], wobei der Statorblatthalter (2) durch mehrfache Abkant- und/oder Stanzvorgänge aus einem einzigen Stück Blech hergestellt ist.
• [5] Windkraftanlage nach einem der Aspekte [1] bis [4], wobei der Statorblatthalter (2) eine im wesentlichen horizontal verlaufende Grundplatte (21, 21a, 21b) und wenigstens eine im wesentlichen vertikal verlaufende Seitenwand (23, 23a, 23b) aufweist, die vorzugsweise die Grundform eines rechtwinkligen Trapezes hat.
• [6] Windkraftanlage nach [5], wobei die Grundplatte (21, 21a, 21b) in horizontaler Richtung zur Drehachse (7) hin um einen Vorsprung (25, 25a, 25b) länger ist als die Seitenwand (23, 23a, 23b), so dass der Vorsprung (25, 25a, 25b) die Deckenplatte (11) des Generatorgehäuses überlappt, während die radial innen liegende Endkante (26, 26a, 26b) der Seitenwand (23, 23a, 23b) vorzugsweise gegen eine Seitenwand des Generatorgehäuses abgestützt ist.
• [7] Windkraftanlage nach [5] oder [6], wobei erste Befestigungsmittel (8) vertikal durch die Grundplatte (21, 21a, 21b) des Statorblatthalters (2) und die Deckenplatte (11) des Generatorgehäuses verlaufen, und/oder die wenigstens eine Seitenwand (23, 23a, 23b) nochmals horizontal abgekantet ist, so dass zweite Befestigungsmittel (9) vertikal durch die Abkantung (24, 24a, 24b) der Seitenwand (23, 23a, 23b) und die Bodenplatte (12) des Generatorgehäuses verlaufen können.
• [8] Windkraftanlage nach einem der Aspekte [5] bis [7], wobei der Statorblatthalter (2) zwei der im wesentlichen vertikal orientierten Seitenwände (22a, 22b, 23, 23a, 23b) aufweist, die die Schenkel eines Profils bilden, das zusammen mit der horizontalen Grundplatte (21, 21a, 21b) im Querschnitt im wesentlichen U-förmig ist, wobei insbesondere eine der Seitenwände (23, 23a, 23b) die Grundform eines Trapezes und die andere (22a, 22b) die Grundform eines Rechtecks hat.
• [9] System aus einer Windkraftanlage nach einem der Aspekte [1] bis [8] und einem im Erdboden und/oder einem Gebäudeteil verankerbaren Mast (6), an dessen vertikalem Endabschnitt (3) die Windkraftanlage befestigt ist.
• [10] System nach [9], wobei der vorzugsweise einen Flansch umfassende Endabschnitt (3) des Mastes (6) mit einer Bodenplatte (12) des Generatorgehäuses verbunden ist, und zwar vorzugsweise mit den zweiten Befestigungsmitteln (9), mit denen auch die Abkantung (24, 24a, 24b) der Seitenwand (23, 23a, 23b) mit der Bodenplatte (12) des Generatorgehäuses verbunden ist.

Hereinafter, aspects [1] to [10] according to the first aspect of the present invention will be enumerated. These aspects or individual elements thereof may preferably be realized in combination with the subject matter defined in the appended claims, but also independently of these as independent inventive ideas:

• [1] Wind turbine with a rotor that is rotatable about a vertical axis of rotation ( 7 ) is mounted and several rotor blades ( 5 ), a stator having a plurality of fixed or movable stator blades ( 4 ) mounted on at least one stator blade holder ( 2 ) are mounted and adapted to the side of the wind turbine air flowing in the direction of the rotor blades ( 5 ) and a generator ( 1 ) for obtaining electrical energy from the rotation of the rotor about the axis of rotation ( 7 ), wherein the stator blade holder ( 2 ) directly on the housing of the generator ( 1 ) is attached.
• [2] wind turbine according to [1], wherein the generator ( 1 is of the internal rotor type and preferably completely within the stator and concentric with the rotor and stator with respect to the axis of rotation ( 7 ) is arranged.
• [3] Wind turbine according to [1] or [2], wherein the stator blade holder ( 2 ) by fastening means ( 8th . 9 ), in particular screws, on a ceiling and / or base plate ( 11 . 12 ) of the generator housing is attached.
• [4] Wind turbine according to any one of aspects [1] to [3], wherein the stator blade holder ( 2 ) is made by multiple Abkant- and / or punching operations from a single piece of sheet metal.
• [5] Wind turbine according to one of the aspects [1] to [4], wherein the stator blade holder ( 2 ) a substantially horizontally extending base plate ( 21 . 21a . 21b ) and at least one substantially vertically extending side wall ( 23 . 23a . 23b ), which preferably has the basic shape of a rectangular trapezium.
• [6] wind turbine according to [5], wherein the base plate ( 21 . 21a . 21b ) in the horizontal direction to the axis of rotation ( 7 ) to get a lead ( 25 . 25a . 25b ) is longer than the side wall ( 23 . 23a . 23b ), so the lead ( 25 . 25a . 25b ) the ceiling plate ( 11 ) of the generator housing overlaps, while the radially inner end edge ( 26 . 26a . 26b ) of the side wall ( 23 . 23a . 23b ) is preferably supported against a side wall of the generator housing.
• [7] wind turbine according to [5] or [6], wherein first fastening means ( 8th ) vertically through the base plate ( 21 . 21a . 21b ) of the stator blade holder ( 2 ) and the ceiling plate ( 11 ) of the generator housing, and / or the at least one side wall ( 23 . 23a . 23b ) is again folded horizontally, so that second fastening means ( 9 ) vertically through the fold ( 24 . 24a . 24b ) of the side wall ( 23 . 23a . 23b ) and the bottom plate ( 12 ) of the generator housing can run.
• [8] Wind turbine according to one of the aspects [5] to [7], wherein the stator blade holder ( 2 ) two of the substantially vertically oriented side walls ( 22a . 22b . 23 . 23a . 23b ), which form the legs of a profile, which together with the horizontal base plate ( 21 . 21a . 21b ) in cross-section is substantially U-shaped, in particular one of the side walls ( 23 . 23a . 23b ) the basic form of a trapezoid and the other ( 22a . 22b ) has the basic shape of a rectangle.
• [9] System of a wind turbine according to one of the aspects [1] to [8] and a mast anchorable in the ground and / or a building part ( 6 ), at its vertical end portion ( 3 ) the wind turbine is attached.
• [10] System according to [9], wherein the end section (preferably comprising a flange) ( 3 ) of the mast ( 6 ) with a bottom plate ( 12 ) of the generator housing, preferably with the second fastening means ( 9 ), with which the fold ( 24 . 24a . 24b ) of the side wall ( 23 . 23a . 23b ) with the bottom plate ( 12 ) of the generator housing is connected.

LIST OF REFERENCE NUMBERS

1

 generator

2

 Statorblatthalter

3

 Mast-end portion / flange

4

 stator blade

5

 rotor blades

6

 mast

7

 axis of rotation

8, 9

 Fastening means / screw

10

 flexible joint

11

 Ceiling plate of the generator housing

12

 Base plate of the generator housing

13

 flexible area

14

 rigid area

15

 Upper rotor section

16

 lower rotor section

17

 rotor shaft

18

 rotor arm

19

 peripheral ring

20

 Fastening means / screw

21, 21a, 21b

 baseplate

22a, 22b

 Side wall

23, 23a, 23b

 Side wall

24a, 24b

 fold

25, 25a, 25b

 head Start

26, 26a, 26b

 end edge

31a-b, 32a-b, 33a-b, 34a-b

 mounting holes

41

 Upper radial bearing

42

 strip

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202013105475 U [0002]
• GB 2116640 A [0003]

Claims (10)

Wind turbine with a rotor which is rotatable about a vertical axis of rotation ( 7 ) is mounted and several rotor blades ( 5 ), a stator with a plurality of stator blades ( 4 ), which are adapted to the side of the wind turbine air flowing in the direction of the rotor blades ( 5 ) and a generator ( 1 ) for obtaining electrical energy from the rotation of the rotor about a rotor shaft ( 17 ), characterized by a flexible joint ( 10 ), which is above the generator ( 1 ) on the rotor shaft ( 17 ) is arranged and an articulated connection between an upper rotor section ( 15 ) and one the generator ( 1 ) driving lower rotor section ( 16 ). Wind turbine according to claim 1, wherein the joint ( 10 ) between the generator ( 1 ) and the attachment of the rotor blades ( 5 ) is arranged and the lower rotor section ( 16 ) hinged with a the rotor blades ( 5 ) supporting upper rotor section ( 15 ) connects. Wind turbine according to claim 1 or 2, wherein the joint ( 10 ) in a flexible manner and over a certain angular range tilting of the rotor shaft ( 17 ) in the region of the upper rotor section ( 15 ) in the radial direction transverse to the axis of rotation ( 7 ) but not deflections in the axial direction along the axis of rotation ( 7 ). Wind turbine according to claim 3, wherein the joint ( 10 ) is adapted to tilt the rotor shaft ( 17 ) in the region of the upper rotor section ( 15 ) relative to the orientation of a non-tilted axis of rotation ( 7 ) in the region of the lower rotor section ( 16 ) over an angular range of 0 ° to 20 °, preferably allow 0 ° to 15 °. Wind turbine according to one of the preceding claims, wherein the joint ( 10 ) is adapted to a torque of the upper rotor section ( 15 ) about the axis of rotation ( 7 ) positively and / or positively in a corresponding torque of the lower rotor section ( 16 ) about the axis of rotation ( 7 ) implement. Wind turbine according to one of the preceding claims, wherein the joint ( 10 ) has a jaw clutch with rubber buffer or an elastomer coupling. Wind turbine according to one of the preceding claims, further comprising a radial bearing ( 41 ), on which the upper rotor section ( 15 ) is rotatably mounted on an upper end portion of the stator, wherein the lower rotor portion ( 16 ) is rotatably mounted on a lower end portion of the stator, preferably via the rotary bearing of the generator ( 1 ), by the lower end portion of the stator is connected directly to the generator housing. Wind turbine according to claim 7, further comprising at least one stator blade holder ( 2 ), on which the stator blades ( 4 ), wherein the rotatable mounting of the lower rotor section ( 16 ) at the lower Statorendabschnitt characterized in that the stator blade holder ( 2 ) on the housing of the generator ( 1 ) and the lower rotor section ( 16 ) rotatable in the generator ( 1 ) is stored. Wind turbine according to claim 7 or 8, wherein the attachment of the lower Statorendabschnitts to the housing of the generator ( 1 ) is performed by an elastic connecting element. System of a wind turbine according to one of the preceding claims and a moor anchored in the ground and / or a building part ( 6 ), at its vertical end portion ( 3 ) the lower rotor section ( 16 ) attaches the wind turbine, wherein the vertical end portion ( 3 ) of the mast ( 6 ) preferably fixed to the housing of the generator ( 1 ) connected is.

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