SEGMENTED GENERATOR, ROTOR SEGMENT, GENERATOR SEGMENT AND WIND TURBINE

Abstract

A rotor segment of a segmented generator, in particular of a permanently excited segmented rotary generator, of a wind turbine, comprises a magnet carrier segment with a rotor circumferential face, in particular a rotor external circumferential face, which in a circumferential direction extends between a first and second separation interface by way of a segment length; the rotor circumferential face having a first separation interface portion having a first length proceeding from the first separation interface in the circumferential direction toward the second separation interface; and a second separation interface portion having a second length proceeding from the second separation interface in the circumferential direction toward the first separation interface; and a connection portion having a third length extending between the first and second separation interface; wherein in each case a reinforcement device for reinforcing the magnet carrier segment is disposed on the rotor circumferential face in the region of the first and second separation interface portion.

Claims

1. A rotor segment of a segmented generator of a wind turbine, comprising: a magnet carrier segment with a rotor circumferential face, which in a circumferential direction extends between a first and a second separation interface by way of a segment length; wherein the rotor circumferential face having has: a first separation interface portion having a first length proceeding from the first separation interface in the circumferential direction toward the second separation interface; a second separation interface portion having a second length proceeding from the second separation interface in the circumferential direction toward the first separation interface; and a connection portion having a third length extending between the first and second separation interface; wherein wherein, in each case a reinforcement device for reinforcing the magnet carrier segment is disposed on the rotor circumferential face in the region of the first and second separation interface portion.

2. The rotor segment as claimed in claim 1, wherein the reinforcement device in the region of the first and/or second separation interface portion locally reinforces the magnet carrier segment in relation to the region of the magnet carrier segment in the connection portion.

3. The rotor segment as claimed in claim 1, wherein the magnet carrier segment with the reinforcement device in the region of the first separation interface portion has a first stiffness, the magnet carrier segment with the reinforcement device in region of the second separation interface portion has a second stiffness, and the connection portion has a third stiffness, wherein: the third stiffness of the connection portion is less than the first and/or second stiffness of the first and/or second separation interface portion, and/or the third stiffness of the connection portion corresponds to the first and/or second stiffness of the first and/or second separation interface portion, and/or the third stiffness of the connection portion is greater than the first and/or second stiffness of the first and/or second separation interface portion.

4. The rotor segment as claimed in claim 1, wherein the first separation interface portion and the second separation interface portion are of substantially identical configuration.

5. The rotor segment as claimed in claim 1, wherein the magnet carrier segment and the reinforcement device in the first and/or second separation interface portion form a cross section with a cross-sectional area and/or a cross-sectional shape that is different from a cross-sectional area and/or a cross-sectional shape of a cross section of the magnet carrier segment in the connection portion.

6. The rotor segment as claimed in claim 1, wherein the reinforcement device is composed of or comprises a material which has a Young's modulus greater than a Young's modulus of a material which the magnet carrier segment comprises or of which the magnet carrier segment is composed.

7. The rotor segment as claimed in claim 1, wherein: the first and/or second length of the first and/or second separation interface portion corresponds to at least 10%, and at most 50%, of the segment length; and/or the magnet carrier segment along a rotation axis has a segment width and the reinforcement device has a width which corresponds to at least 30%, and at most 80%, of the segment width.

8. The rotor segment as claimed in claim 1, wherein the reinforcement device has: a planar reinforcement element; one or a plurality of axial webs, which have a main extent along the rotation axis; one or a plurality of circumferential webs, which have a main extent in the circumferential direction orthogonal to the rotation axis; and/or one or a plurality of diagonal webs, which have a main extent diagonal to the circumferential direction and the rotation axis.

9. The rotor segment as claimed in claim 1, wherein: a plurality of axial webs are disposed equidistantly from one another in the circumferential direction; a plurality of circumferential webs are disposed equidistantly from one another in the axial direction; and/or the planar reinforcement element is disposed spaced parallel to the rotor circumferential face.

10. The rotor segment as claimed in claim 1, wherein the reinforcement device is welded and/or screwed to the rotor circumferential face.

11. The rotor segment as claimed in claim 1, further comprising a reinforcement ring segment, which has a substantial main direction of extent in the circumferential direction and/or a radial direction, for reinforcing the rotor segment.

12. A generator segment of a segmented generator for a wind turbine, comprising a rotor segment as claimed in claim 1.

13. The generator segment as claimed in claim 12, comprising a stator segment.

14. A segmented generator for a wind turbine, comprising two or a plurality of generator segments as claimed in claim 12, wherein the two or plurality of generator segments are disposed in an annular manner.

15. A wind turbine comprising a segmented generator as claimed in claim 14.

16. The rotor segment as claimed in claim 1, wherein the rotor segment is a rotor segment of a permanently excited segmented rotary generator.

17. The rotor segment as claimed in claim 1, wherein the rotor circumferential face is a rotor external circumferential face.

18. The rotor segment as claimed in claim 5, wherein: the cross-sectional area of the first and/or second separation interface portion is larger than the cross-sectional area of the connection portion; and/or the cross section of the first and/or second separation interface portion has a moment of inertia of area and/or a torsional moment of inertia which is greater than a moment of inertia of area and/or a torsional moment of inertia of the cross section of the connection portion.

19. The rotor segment as claimed in claim 1, wherein: the first and/or second length of the first and/or second separation interface portion corresponds to at least 20%, and at most 40%, of the segment length; and/or the magnet carrier segment along a rotation axis has a segment width and the reinforcement device has a width which corresponds to at least 50%, and at most 100%, of the segment width.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0076] Embodiments will be explained by way of example with the aid of the appended figures.

[0077] FIG. 1 shows a schematic, three-dimensional view of an exemplary embodiment of a wind turbine in an operating state.

[0078] FIG. 2 shows a schematic, three-dimensional view of an exemplary embodiment of a generator segment with a preferred embodiment of a reinforcement device.

[0079] FIG. 3 shows a schematic, three-dimensional view of an exemplary embodiment of a segmented generator with a further preferred embodiment of a reinforcement device.

[0080] FIG. 4 shows a schematic, two-dimensional view of a further exemplary embodiment of a generator segment.

[0081] FIGS. 5a, 5b, and 5c show a two-dimensional frontal, lateral and plan view from above of a connection portion of the generator segment illustrated in FIG. 4.

[0082] FIGS. 6a, 6b, and 6c show a two-dimensional frontal, lateral and plan view from above of a first and second separation interface portion of the generator segment illustrated in FIG. 4.

[0083] FIG. 7 shows a schematic, three-dimensional view of a further exemplary embodiment of a generator segment.

[0084] In the figures, identical or substantially functionally identical or similar elements are denoted by the same reference designations. If general reference is made to a generator, rotor or stator in the present description of the figures, this in principle includes a segmented generator, segmented rotor or segmented stator, unless this is expressly described otherwise.

DETAILED DESCRIPTION

[0085] FIG. 1 shows a schematic, three-dimensional view of an exemplary embodiment of a wind turbine. FIG. 1 shows in particular a wind turbine 100 with a tower 102 and a nacelle 104. A rotor 106 having three rotor blades 108 and having a spinner 110 is disposed on the nacelle 104. During operation, the rotor 106 is set in rotation by the wind and thereby drives a generator in the nacelle 104. The tower 102 has, in particular, wind turbine steel tower ring segments with flange segments. As a result, the tower 102 is constructed using components that are easy to transport and that can also be connected with great precision and with little effort.

[0086] A schematic, three-dimensional view of a preferred embodiment of a generator segment 10 of a segmented generator 1 is shown in FIG. 2. Shown in FIG. 3 is a schematic, three-dimensional view of a preferred embodiment of a segmented generator 1 assembled from two generator segments 10. The generator segments 10 have a rotor segment 200 and a stator segment 300. The generator segments 10 shown in FIGS. 2 and 3 are configured for a segmented generator configured as an external rotor. In this respect, the stator segment 300 is disposed within the rotor segment 200.

[0087] The generator segments 10 or the rotor segments 200 and stator segments 300 extend in a circumferential direction U between a first separation interface T1 and a second separation interface T2. The first and second separation interface T1, T2 define a first and second separation interface plane, within which the rotation axis D extends.

[0088] The first and second separation interface T1, T2 of the generator segment 10 have a connection device which is configured to connect adjacent generator segments 10, which are disposed to form a segmented generator 1, to one another. In the preferred embodiment, the connection device of the first and second separation interface T1, T2 is configured to mechanically connect adjacent generator segments 10, i.e., adjacent rotor segments 200 and adjacent stator segments 300. For this purpose, the first and second separation interface T1, T2 have a flange connection and a threaded connection as a connection device. Derived from the generator segment 10 illustrated schematically in FIG. 2 is a connection device configured with flange connections at the first and second separation interface T1, T2. In the segmented generator 1 illustrated schematically in FIG. 3, the two generator segments 10 at the respective separation interfaces T1, T2 are connected to one another in the circumferential direction via the corresponding flange connections with threaded connections.

[0089] The rotor segments 200 illustrated in FIGS. 2 and 3 have a magnet carrier segment 210 with a rotor circumferential face 212. A reinforcement device 400 is disposed on the rotor circumferential face 212, in particular the rotor external circumferential face, in the region of the first and second separation interface portion A1, A2. The reinforcement devices 400 in FIG. 2 as well as in FIG. 3 extend in the first and second separation interface portion A1, A2 by way of a first and second length L1, L2. In particular, the reinforcement devices 400 extend by way of the same length in the first and second separation interface portion A1, A2. In particular, the reinforcement devices 400 disposed in the region of the first and second separation interface portion A1, A2 are of identical configuration. In the preferred embodiments of the generator segments 10 illustrated in FIGS. 2 and 3, the first and second length L1, L2 of the first and second separation interface portion A1, A2 corresponds to one sixth of the segment length of the rotor segment 200. The third length L3 of the connection portions A3 of these preferred embodiments of the generator segments 10 corresponds to four sixths of the segment length of the rotor segment 200.

[0090] The preferred embodiment of the reinforcement device 400 illustrated in FIG. 2 has three circumferential webs which are disposed parallel to one another and spaced apart in the axial direction A and which are fastened to the magnet carrier segment 210 by way of threaded connections. FIG. 3 shows the reinforcement device 400 in a further preferred embodiment as a reinforcement element which extends in a planar manner and is connected to the magnet carrier segment 210 by means of a welded connection. It can be seen both in FIG. 2 and in FIG. 3 that the reinforcement device 400 disposed in the region of the first separation interface portion A1 has a length in the circumferential direction U and a width in the axial direction A that corresponds to the first length and first width of the first separation interface portion A1.

[0091] FIG. 4 shows a schematic, two-dimensional view of a further exemplary embodiment of a generator segment 10. In this preferred embodiment, the rotor segment 200 has a first and second separation interface portion A1, A2 between which a connection portion A3 extends. The first and second separation interface portion A1, A2, proceeding from a first and second separation interface T1, T2, extend in the direction of the connection portion A3. In this preferred embodiment, the first and second length L1, L2 of the first and second separation interface portion A1, A2 and the third length L3 of the connection portion A3 each correspond to one third of the segment length of the rotor segment 200. In this preferred embodiment, in the circumferential direction, the first and second separation interface portion A1, A2 and the connection portion A3 extend with the same length. Furthermore, the reinforcement devices 400 disposed in the region of the first and second separation interface portion A1, A2 extend by way of the first or second length of the respective separation interface portion A1, A2.

[0092] A schematic two-dimensional frontal, lateral and plan view from above of the connection portion of the generator segments 10 illustrated in FIG. 3 is shown in FIGS. 5a, 5b, and 5c. A schematic two-dimensional frontal, lateral and plan view from above of the first and second separation interface portion A1, A2 of the generator segments 10 illustrated in FIG. 3 is shown in FIGS. 6a, 6b, and 6c.

[0093] Circumferential webs which extend in the circumferential direction U, and axial webs which extend in the axial direction A along the rotation axis D, are disposed on the rotor external circumferential face 212 of the magnet carrier segment 210. These are disposed both in the region of the connection portion A3 and in the region of the first and second separation interface portion A1, A2. This can be derived, for example, from the two generator segments 10 shown in FIG. 3. Corresponding axial webs and circumferential webs are disposed in the region of the connection portion A3, in the upper generator segment 10 in the view of FIG. 3. These are obscured by the reinforcement device 400 in the first separation interface portion A1. In the lower generator segment 10 shown in FIG. 3, the reinforcement device for the second separation interface portion A2 is not shown, so that the arrangement of the axial webs and circumferential webs is shown here. The axial and circumferential webs, which extend uniformly in the circumferential direction between the first and second separation interface T1, T2, are disposed on the rotor circumferential face 212 and on which a reinforcement element which extends in a planar manner is disposed as reinforcement device 400, can also be derived schematically from FIGS. 6a and 6b.

[0094] It is to be understood in particular that no reinforcement device 400 in the context of the disclosure can be seen in these axial webs and circumferential webs that are disposed both in the region of the connection portion A3 and in the region of the first and second separation interface portion T1, T2. Rather, the reinforcement device 400 according to the disclosure is to be understood as an additional reinforcement which, in particular locally, strengthens or reinforces the first and/or second separation interface portion A1, A2 in relation to the connection portion A3.

[0095] Shown in FIG. 7 is a schematic, three-dimensional view of a further exemplary embodiment of a segmented generator 1, or of two generator segments 10. In this preferred embodiment, it is provided that the two generator segments 10 extend through 180? in the circumferential direction. The two generator segments 10 have a connection device at the first and second separation interfaces T1, T2, via which the two generator segments 10 disposed adjacently in the circumferential direction are connected to one another. Proceeding from the first and second separation interface T1, T2, both generator segments 10 have two circumferential webs as reinforcement device 400 which have a main direction of extent in the circumferential direction U. In the upper generator segment 10 and in portions also in the lower generator segment, it can be clearly seen that the two circumferential webs are disposed between three webs which run in the circumferential direction and extend from the first to the second separation interface on the rotor external circumferential face 212 of the magnet carrier segment 210. This means that both the two separation interface portions A1, A2 and the connection portion A3, which extends between the two separation interface portions A1, A2, have the three webs encircling in the circumferential direction on the rotor external circumferential face 212 of the magnet carrier segment 210. The reinforcement device 400 according to the disclosure cannot be seen in these three webs which extend from the first to the second separation interface T1, T2. Rather, the reinforcement device according to the disclosure can only be seen in the two circumferential webs, which are disposed exclusively in the first and second separation interface portion A1, A2, said reinforcement device reinforcing, in particular locally reinforcing, the first and second separation interface portion A1, A2 of the generator segment 10 in relation to the connection portion A3.

LIST OF REFERENCE SIGNS

[0096] 1 Segmented generator [0097] 10 Generator segment [0098] 100 wind turbine [0099] 102 Tower [0100] 104 Nacelle [0101] 106 Rotor [0102] 108 Rotor blades [0103] 109 Stator [0104] 110 Spinner [0105] 200 Rotor segment [0106] 210 Magnet carrier [0107] 212 Rotor circumferential face [0108] 300 Stator segment [0109] 400 Reinforcement device [0110] A Axial direction [0111] A1 First separation interface portion [0112] A2 Second separation interface portion [0113] A3 Connection portion [0114] D Rotation axis [0115] L1 First length [0116] L2 Second length [0117] L3 Third length [0118] R Radial direction [0119] T1 First separation interface [0120] T2 Second separation interface [0121] U Circumferential direction