Clamping device for transporting a motor-generator section, corresponding motor-generator section, motor-generator, wind turbine and method

Abstract

The present invention relates to a clamping device (31) for use as a mechanical interface between an electric generator section (15) and a transport device suitable for transporting the section (15), wherein the clamping device (31) includes a connecting member (24) and two clamping members (26, 30), wherein the connecting member (24) is adapted to be arranged in a through hole (22) of the section (15), wherein the clamping members (26, 30) can be attached to each other by means of the connecting member (24) arranged in the through hole (22), such that portions of the section (15) arranged in the through hole (22) are clamped between the clamping members (26, 30), wherein at least one of the clamping members (26, 30) is connected to or includes a connecting device (34) capable of being connected to a connecting device of the transport device.

Description

Technical Field

[0001] The present invention relates to a clamping device used as a mechanical interface between an electric generator section and a transport device suitable for transporting the section.

[0002] Furthermore, the present invention relates to an electric generator section that forms part of the rotor or stator of an electric generator.

[0003] Additionally, the present invention relates to an electric generator for a wind turbine, comprising a stator and a rotor.

[0004] Furthermore, the present invention relates to a wind turbine.

[0005] Finally, the present invention relates to a method for transporting sections of electric generators. Background Technology

[0006] A wind turbine typically consists of an electric generator and a rotatably mounted hub with several blades. Wind power drives the hub to rotate, which is then transmitted to the rotor of the electric generator. The electric generator is usually housed within a nacelle, which is positioned atop the wind turbine's tower. Modern wind turbines can have total heights ranging from tens to hundreds of meters. The output power of the electric generator can range from several megawatts, particularly between 1 megawatt and 40 megawatts. Therefore, the components of the electric generator (such as the stator or rotor) are typically quite large and heavy, weighing approximately several tons or more. To simplify transportation and installation, the generator's stator and / or rotor are usually composed of several individual pieces or sections, which are easier to handle than a single, complete stator or rotor. Once transported to their designated location, these sections are assembled together and attached to each other.

[0007] DE 10 2010 061 966 A1 discloses a generator having a stator and rotor composed of several sections, and an installation concept for attaching these sections to each other by screws. WO 2022 / 263 070A1, EP 4 156 465A1, and EP 3 918 694 B1 disclose further concepts for generators having stators divided into sections. EP 4068 574 A1 discloses further concepts related to wind turbine generators that form the technical background of this invention.

[0008] Transporting or hoisting a section of a wind turbine to its designated location on a construction site is a challenging task, as it is used to connect to other components of the generator or wind turbine. Typically, a crane is used as the transport device in such cases. The couplings used to connect the section to the transport device are usually heavy and large, and therefore difficult to handle. Another downside is that these couplings are typically connected to the section by screws screwed into threaded holes in the section. Since the actual purpose of these threaded holes is to connect the section to other components of the generator or wind turbine, the mechanical strength of the threads is often insufficient to withstand the large loads that may occur during the section's transport. Consequently, the threads may become damaged, making it unusable later for their intended purpose of connecting components to other parts. Summary of the Invention

[0009] The purpose of this invention is to provide an enhanced concept for a generator for a wind turbine, the generator having a stator and / or rotor consisting of several sections, particularly concerning the transportation process of the sections to be installed at a wind turbine construction site.

[0010] According to the invention, in order to achieve this objective, the clamping device as originally described includes a connecting member and two clamping members, wherein the connecting member is adapted to be arranged in a through hole of a section, wherein the clamping members can be attached to each other by means of the connecting member arranged in the through hole, such that a portion of the section arranged on the through hole is clamped between the clamping members, wherein at least one of the clamping members is connected to or includes a connecting device, the connecting device being connectable to a connecting device of a transport device.

[0011] The clamping device enables a mechanical link between the section and the transport device. Clamping is generated by the clamping device and ensures adequate connection between the components of the clamping device and between the clamping device and the section. Clamping ensures that forces generated during the transport of the section are transferred from the transport device to the section. To withstand these forces, the clamping device or its components are each made of materials that ensure sufficient mechanical stability. The clamping device or its components can be made of metal, particularly steel. The force that holds the clamping components and the connecting components together achieves the clamping force. Therefore, one of the central concepts of the invention is to use a clamping device to realize a clamping mechanism that can be used to connect the transport device and the section. In particular, in contrast to the use of threaded holes in the corresponding sections initially described, the clamping connection achieves the effect of distributing the mechanical load over a larger area of ​​the section when load peaks are generated on the threads, thereby preventing damage.

[0012] Preferably, the clamping portion of the segment between the clamping members completely surrounds the through hole. For example, the clamping portion of the segment has a circular shape. This shape can be annular, with the through hole arranged at the center of the clamping portion. The clamping portion is the part of the segment on which the clamping force acts. The through hole can be provided on a plate-like, particularly flat, section of the segment, such as a wall. In other words, the clamping portion and / or the clamping members can be flat or plate-like, respectively. The clamping portion and the clamping members are preferably arranged in a sandwich configuration, with the clamping portion arranged between the clamping members. In other words, the clamping members can be arranged on both sides of the clamping portion.

[0013] Preferably, the connecting member includes at least one hole with internal threads, wherein at least one of the clamping members is at least one rod with external threads or includes at least one rod with external threads, wherein the clamping members can be attached to each other by a threaded joint, which is achieved by screwing at least one rod into at least one hole. Regarding the arrangement of the connecting members in the through hole, at least one hole or aperture is positioned such that it is accessible from the outside to allow insertion of at least one rod. The clamping force depends on the force or strength used or expressed to screw at least one rod into at least one hole.

[0014] The clamping component, including the rod and the connecting device, can be an eye bolt. Specifically, in this embodiment, the connecting device can be a lug, which can be connected to a hook on the transport device. The rod may include a free end inserted into a hole, with the lug arranged on the other end of the rod.

[0015] The connecting component may be a bushing or may include a bushing. Bushings particularly include sleeve-like structures, or in other words, hollow and cylindrical shapes, wherein the hollow interior of the bushing realizes a hole. The external shape of the bushing, particularly its outer diameter, may correspond to the internal shape of the through hole, particularly its inner diameter. In particular, these shapes may be identical.

[0016] Preferably, the axial length of the through hole exceeds the axial length of the bushing. Therefore, a gap or slit is left between the front end of the bushing and the connecting member including the rod. Apart from the threaded joint, there is no contact between the bushing and the connecting member with the rod. This results in no additional mechanical load being transmitted from the connecting member to the bushing, which leads to a reduction in clamping force.

[0017] The clamping device may include a retaining device to prevent relative rotation between the segment and at least a portion of the clamping device. Specifically, if there is rotational symmetry with respect to at least a portion of the clamping member and the connecting member, screwing at least one bolt into at least one hole may cause relative rotation between the clamping member and the segment, potentially hindering the generation of clamping force. Specifically, the retaining device connects the respective connecting member and the segment, thereby preventing relative rotation between these members. The retaining device may be part of the clamping member or the connecting member, or it may be a separate component. To prevent such rotation, the retaining device of the clamping device may be connected to a retaining device of the segment. For example, the retaining device includes a threaded bolt extending through a through-hole of the respective clamping member and screwed into a hole in the segment.

[0018] Preferably, at least one of the clamping members is a flange or includes a flange, wherein the clamping members can be attached to each other by means of connecting members arranged in through holes, such that portions of the segments arranged in the through holes are clamped between the flange of one clamping member and the flange of another clamping member, particularly another clamping member. In particular, circular flanges include flat and / or plate-like structures that contact the corresponding clamping segments. The geometry of the flanges ensures a large contact area between the corresponding connecting members and the clamping segments, and thus reduces localized mechanical stress.

[0019] According to an optional embodiment of the invention, the flange of the connecting member, which particularly includes at least one rod, is at least one washer. The washer is a circular and plate-shaped component having, preferably, a central hole through which the rod extends. The rod and the flange, and in particular the washer, can be separate components. Preferably, the washers are respectively arranged between the head of the rod and the section or clamping section.

[0020] Preferably, one of the connecting component and the clamping component is formed from a common component. Therefore, the common component includes one of the clamping component and the connecting component. The clamping component and the connecting component are preferably separate parts of the common component. The common component can be implemented as a single piece. The common component may include separate pieces as clamping components and connecting components, which are attached to each other, for example, by welding. According to this embodiment, in particular, the connecting component as a bushing and the clamping component as a flange are implemented through the common component. Specifically, a circular flange can be arranged on one of the end faces of the bushing. On the other end face, an opening of a hole can be arranged.

[0021] Furthermore, according to the invention, this objective is achieved by the electric generator section as described above, wherein the electric generator section includes a connecting member of the clamping device according to the foregoing description, wherein the connecting member is arranged in a through hole in the electric generator section. All features, aspects, and advantages already explained with respect to the clamping device according to the invention can be transferred to the electric generator section according to the invention, and vice versa.

[0022] The generator section can be a stator section of the generator stator or a rotor section of the generator rotor. This section can be a support structure for holding electromagnetic active components, or include a support structure for holding electromagnetic active components, such as laminated stacks and / or windings made of conductive wires and / or permanent magnets. The support structure can include retaining elements, each of which can extend longitudinally along the longitudinal direction of the section or generator. The retaining elements can have a hollow structure, particularly achieved through a hollow metal profile. The profile can have a rectangular shape. The profile can consist of, in particular, four walls. The walls can include at least one access opening, such that at least one of the connecting and clamping components can be arranged in its designated position and / or attached or secured to each other via a tool (particularly a screwdriver), which is fed through the access opening. A plurality of retaining elements can be arranged along the circumferential direction of the section or generator. Preferably, through holes are arranged on a plate-like, particularly flat, section of the generator section. This section can be one of the walls of the retaining elements.

[0023] An electric generator may include an inner stator and an outer rotor, wherein the inner stator is arranged radially inward relative to the rotor. According to this embodiment, with respect to sections suitable for realizing the inner stator, a support structure may be arranged radially inward relative to the electromagnetic active component, and / or with respect to sections suitable for realizing the outer rotor, the support structure may be arranged radially outward relative to the electromagnetic active component. Alternatively, the electric generator may include an inner rotor and an outer stator, wherein the inner rotor is arranged radially inward relative to the stator. According to this embodiment, with respect to sections suitable for realizing the inner rotor, a support structure may be arranged radially inward relative to the electromagnetic active component, and / or with respect to sections suitable for realizing the outer stator, the support structure may be arranged radially outward relative to the electromagnetic active component.

[0024] Preferably, the connecting member is pressed into the through hole. According to this embodiment, the external shape of the connecting member, particularly its outer diameter, may be slightly larger than the internal shape of the through hole, particularly its inner diameter. The press-fit connection prevents the connecting member from being lost. Furthermore, the press-fit connection prevents relative rotation between this section and at least a portion of the clamping device. Therefore, the press-fit connection may be provided additionally or alternatively to the fixing device.

[0025] Additionally, according to the invention, this objective is achieved by an electric generator as described above, wherein at least one segment of the stator and / or at least one segment of the rotor are electric generator segments according to the paragraphs described above. All features, aspects, and advantages already explained with respect to the clamping device according to the invention and / or the electric generator segments according to the invention can be transferred to the electric generator according to the invention, and vice versa.

[0026] An electric generator includes a stator and a rotatably mounted rotor, which can be arranged within the generator housing. Electromagnetic active components, particularly laminated stacks and / or windings and / or permanent magnets, are provided for the stator and rotor, wherein electromagnetic interactions between these active components, while the rotor is rotating, result in the generation of electrical energy using the electric generator.

[0027] The stator or rotor segments can be positioned adjacent to each other in the circumferential direction of the stator or rotor or the generator to form a ring structure. Regarding the cross-section perpendicular to the longitudinal direction of the generator, the segment can include an arc or sector shape. The number of stator or rotor segments can be at least two and at most sixteen.

[0028] Preferably, the generator section and at least one adjacent section are connected to each other by connecting members. According to this embodiment, the clamping device, or more precisely, the connecting member retained within the through-hole, serves on one hand as a means of transporting the respective section, and on the other hand as a connecting device between adjacent sections of the resulting generator. For example, the holes of a pair of adjacent connecting members, particularly bushings, can be aligned, wherein connecting screws can be screwed into or extend through the two holes.

[0029] Furthermore, according to the invention, this objective is achieved by a wind turbine as described above, including an electric generator according to the foregoing description, wherein the wind-induced rotation of the wind turbine hub can be transmitted to the rotor to generate electrical energy. All features, aspects, and advantages already described for the clamping device according to the invention and / or the electric generator section according to the invention and / or the electric generator according to the invention can be transferred to the wind turbine according to the invention, and vice versa.

[0030] The wind turbine according to the invention may include a tower on which a nacelle is disposed. A hub having several, particularly three, blades may be disposed on the front of the nacelle. The hub may be mounted such that it is rotatable about an axis of rotation. The wind-driven rotation of the hub is transmitted to an electric generator preferably located within the nacelle. The rotation of the hub may be transmitted to the electric generator via a main shaft extending along the axis of rotation. The axis of rotation may define the longitudinal direction of the wind turbine and the generator. The wind turbine may be a direct-drive wind turbine, meaning that the hub is directly connected to the rotor, i.e., without gears for switching the rotational frequency between the two. The total height of the wind turbine may be approximately tens of meters or hundreds of meters. The output power of the wind turbine generated by the generator may be in the range of multiple megawatts, particularly between 1 megawatt and 40 megawatts.

[0031] Finally, according to the invention, this objective is achieved by the method described above for transporting an electric generator section using the clamping device according to the above description, wherein an electric generator section with a through hole is provided, wherein connecting members are arranged in or are arranged in the through hole, wherein the clamping members are attached to each other by connecting members such that portions of the section arranged in the through hole are clamped between the clamping members, wherein a connecting device of at least one of the clamping members is connected to a connecting device of a transport device, wherein the electric generator section is transported by the transport device, and the clamping device serves as a mechanical interface between the electric generator section and the transport device. All features, aspects, and advantages already explained with respect to the clamping device according to the invention and / or the electric generator section according to the invention and / or the electric generator according to the invention and / or the wind turbine according to the invention can be transferred to the method according to the invention, and vice versa.

[0032] The first step of this method involves providing an electric generator section with through-holes. Preferably, this section is pre-manufactured and has connecting components already arranged within the through-holes. Alternatively, the connecting components may be arranged in the through-holes in a specific step. The next step involves attaching the clamping components to each other to achieve clamping force. Subsequently, the connecting devices of the clamping device and the connecting devices of the transport device are connected to each other to allow for the transport of the section.

[0033] Preferably, after transporting the generator section, the clamping device is disassembled, and the connecting components arranged in the through-hole are removed from the through-hole. According to this embodiment, the through-hole can be used collaboratively as a device related to the final generator. In particular, the through-hole can serve as a ventilation opening, guiding air for cooling the generator components through the ventilation opening. Additionally or alternatively, the clamping device can be reused in the transport process of other sections. Attached Figure Description

[0034] Other objects and features of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings. However, the drawings are merely schematic diagrams designed for illustrative purposes only and do not limit the invention. The drawings show:

[0035] Figure 1 The diagram shows a view of a wind turbine according to an embodiment of the present invention, including an electric generator according to an embodiment of the present invention, wherein the electric generator according to an embodiment of the present invention includes a rotor and a stator composed of several sections.

[0036] Figure 2 Showing through Figure 1 A cross-section of the electric generator of a wind turbine, wherein the cutting plane is composed of Figure 1 Line II-II in the middle indicates,

[0037] Figure 3 Show Figure 2 A perspective view of the stator section of the generator.

[0038] Figure 4 Showing through Figure 3 A perspective view of the section section, wherein the cutting plane is formed by... Figure 3 The IV-IV line in the middle indicates,

[0039] Figure 5 Showing through Figure 3 A perspective view of the section section, wherein the cutting plane is formed by... Figure 3 The VV indicator in the middle,

[0040] Figure 6 Showing through Figure 3 A two-dimensional section of the segment, wherein the cutting plane is parallel to... Figure 5 The cutting planes are the same, wherein the clamping device according to an embodiment of the invention is installed in this section, and

[0041] Figure 7 Showing with Figure 6 The same Figure 3 A view of a segment where the segment is connected to an adjacent segment. Detailed Implementation

[0042] Figure 1A wind turbine 1 according to an embodiment of the present invention is shown. The wind turbine 1 includes a tower 2, and a nacelle 3 is disposed on the tower 2. A hub 4 having a plurality of blades, particularly three blades 5, is disposed on the front of the nacelle 3. The hub 4 is mounted such that it is rotatable about a rotation axis defining a longitudinal direction 6. According to an embodiment of the present invention, wind-driven rotation of the hub 4 is transmitted to an electric generator 7 located within the nacelle 3. The rotation of the hub 4 is transmitted to the electric generator 7 via a main shaft 8 extending along the rotation axis 6. The electric generator 7 includes a stator 10 and a rotor 11, exemplarily an inner stator 10 and an outer rotor 11. The stator 10 and the rotor 11 are disposed within a housing 9 of the generator 7. When the stator 10 is non-rotatably mounted, the rotor 11 is connected to the main shaft 8 such that the rotation of the hub 4 is directly transmitted to the rotor 11. The wind turbine 1 is a direct-drive wind turbine. Alternatively, the shaft 8 and the rotor 11 may be connected by a gear assembly. A bearing assembly is provided ( Figure 1 (Not shown in the image) to hold shaft 8 in place. Although the total height of wind turbine 1 is approximately tens or hundreds of meters, the output power generated by generator 7 of wind turbine 1 can be in the range of multiple megawatts, particularly between 1 megawatt and 40 megawatts.

[0043] Therefore, the axis of rotation and the longitudinal direction 6 are arranged horizontally, but can also be inclined relative to the horizontal direction. The radial direction 12 is perpendicular to the longitudinal direction 6 and points radially outward away from the axis of rotation. The circumferential direction 13 is given by the direction of the point rotating around the axis of rotation. The longitudinal direction 6 refers not only to the generator 7, but also to the stator 10 and rotor 11, as well as this section 15. The same applies to the other directions 12 and 13.

[0044] Figure 2 A cross-section through generator 7 is shown, with the cross-sectional plane perpendicular to the longitudinal direction 6. The cutting plane is formed by... Figure 1 Line II-II is indicated in the middle. Stator 10 is attached to housing 9 ( Figure 2 (Not shown in the image). A permanent magnet 14 is arranged on the rotor 11 on the side facing the stator 10. The stator 10 includes a plurality of stator sections 15, each stator section 15 including a lamination stack 16. In this example, eight stator sections 15 are provided. An air gap 17 is provided between the stator 10 and the rotor 11. The stator 10 is mounted on a hollow shaft 18 via a stator support structure 19 of the respective stator 10. The rotation of the rotor 11 relative to the stator 10 induces a current in the stator coils formed by the stator windings.

[0045] Next, refer to Figure 3The diagram shows a perspective view of one of the sections 15. The support structure 19 includes retaining elements 20 that serve as hollow metal profiles supporting the stack of laminates 16. Each of the retaining elements 20 extends longitudinally along a longitudinal direction 6. The profiles have a rectangular shape and are made of metal, such as steel. Through holes 22 are provided on each of the two lateral ends of the outer wall 21 of the outermost retaining element 20. Additionally, a plurality of threaded segments 23 are arranged along the longitudinal direction of the retaining element 20 or the wall 21, the threaded segments 23 serving as devices for attaching adjacent elements 15 to each other.

[0046] Next, refer to Figure 4 and Figure 5 Each shows a close-up view of a cross section passing through segment 15 or retaining element 20, wherein the cutting plane is formed by... Figure 3 The lines IV-IV and VV indicate this. Figure 4 The cross-section extends laterally next to the through hole 15. Figure 5 The cross-section extends through the center of the through hole 15. In the following text, it will be specifically referred to by means of... Figure 4 and Figure 5 The process of transporting and installing the stator 10 is described, namely, delivering the section 15 to its designated location and attaching the sections 15 to each other.

[0047] According to the first step, section 15 is provided. A connecting member 24, which is a bushing 25 having an exemplary diameter of approximately 40 mm, is arranged into or is arranged in the through hole 22. An inner clamping member 26, which is a transverse flange 27 having an exemplary diameter of approximately 80 mm, and the connecting member 24 are realized by a common member 28. The bushing 25 is pressed into the through hole 22. The side of the flange 27 pointing towards the connecting member 24 contacts the inside of the wall 21. The axial length of the through hole 22 (i.e., the thickness of the wall 21) is slightly greater than the axial length of the bushing 25, such that a step 29 is formed between the region of the wall 21 surrounding the through hole 22 and the end face of the bushing 25. Exemplarily, the step has a depth of approximately 1 mm.

[0048] Connecting component 24, inner clamping component 26 and outer clamping component 30 (see...) Figure 5 A clamping device 31 according to an embodiment of the invention is implemented, which serves as a mechanical interface between section 15 and a transport device, which is a crane (not shown in the figure). The outer clamping member 30 includes a rod 32 having external threads 35, wherein the rod 32 is screwed into a central hole 33 of a bushing 25 having internal threads 36, particularly standard M24 threads. The outer clamping member 30 implements an eye bolt, including a connecting device 34 with a lug as a connecting device that can be connected to the transport device, i.e., a hook arranged on the lower end of the crane's rope. The eye bolt is an existing commercial product.

[0049] Figure 6 The figure shows a cross-section of the clamping device 31 with the rod 32 screwed into the hole 33 and passing through the corresponding component of section 6. As becomes apparent from this figure, the outer clamping component 30 also includes a flange 27, which is a washer 37 disposed between the outer side of the wall 21 and the head 38 of the rod 32. Due to the step 29, a gap or slot 39 is created between the underside of the washer 37 and the front end surface of the bushing 25. Therefore, by Figure 6 The clamping force generated by the threaded joint shown acts only on the portion of wall 21 that is clamped between washer 37 and flange 27 of inner clamping member 26.

[0050] Although the connecting device 26 is pressed into the through hole 22, there is a risk that the connecting device 26 will rotate when the rod 32 is screwed into the hole 33 of the bushing 25. To overcome this problem, the clamping device 31 includes a retaining device 40 to prevent relative rotation between the segment 15 and at least a portion of the clamping device 31. The retaining device 40 connects the inner connecting member 26 and the segment 15, thereby impeding relative rotation between these components. The retaining device 40 includes a threaded bolt 41 that extends through the through hole 42 of the flange 27 of the inner clamping member 26 and is screwed into the hole 43 of the wall 21.

[0051] After section 15 of stator 10 is transported to its designated position, screws are inserted into the threaded section 23 of the support structure 19 of the adjacent section 15 (see...). Figure 3 In this process, sections 15 are attached to each other. The openings of the threaded sections 23 are interconnected to allow the screws to be screwed into the threaded sections 23. In addition, the outer clamping member 30 is unscrewed from the common member 28.

[0052] According to the first alternative, the common component 28 is removed from the through-hole 22, wherein an access opening 45 in one of the walls 21 of the support structure 19 is configured to allow removal of the common component 28, which can then be used in another transport process of another segment 15. The through-hole 22 can serve as a ventilation opening through which air for cooling the components of the generator 7 is directed during operation of the generator 7.

[0053] According to the second alternative, the common component 28 is retained in the through hole 22, wherein two adjacent sections 15 are connected to each other by their internal connecting component 26. Figure 7 This situation is shown in the figure. Figure 7A cross-section through these connecting parts 26 is shown. As can be seen from this figure, the walls 21 of the two sections 15 are spaced apart from each other because the threaded sections 23 further used to connect these sections 15 include protrusions from the outside of the respective walls 21. Threaded bolts 46 extend through the alignment holes 33 of the common part 28 and are secured by nuts 44.

[0054] For completeness, the aforementioned concept regarding the transport of segment 15 as a segment of stator 10 can also be applied to segment 15 as a segment of rotor 11.

[0055] Although the invention has been described in detail with reference to preferred embodiments, the invention is not limited to the disclosed examples, and those skilled in the art can derive other variations from the examples without departing from the scope of the invention.

[0056] Individuals with male, female or other gender identities are also included in the terminology, independent of the use of grammatical terms.

Claims

1. A clamping device (31) for use as a mechanical interface between an electric generator section (15) and a transport device suitable for transporting said section (15), wherein, The clamping device (31) includes a connecting member (24) and two clamping members (26, 30), wherein the connecting member (24) is adapted to be arranged in a through hole (22) of the section (15), wherein the clamping members (26, 30) can be attached to each other by means of the connecting member (24) arranged in the through hole (22), such that the portion of the section (15) arranged in the through hole (22) is clamped between the clamping members (26, 30), wherein at least one of the clamping members (26, 30) is connected to or includes a connecting device (34) that can be connected to a connecting device of a transport device.

2. The clamping device (31) according to claim 1, characterized in that, The connecting member (24) includes at least one hole (33) with an internal thread (36), wherein at least one of the clamping members (26, 30) is at least one rod (32) with an external thread (35) or includes at least one rod (32) with an external thread (35), wherein the clamping members (26, 30) are capable of attaching to each other by a threaded joint, which is achieved by screwing at least one rod (32) into at least one hole (33).

3. The clamping device (31) according to claim 2, characterized in that, The connecting component (24) is a bushing (25) or includes a bushing (25).

4. The clamping device (31) according to claim 3, characterized in that, The axial length of the through hole (22) exceeds the axial length of the bushing (25).

5. The clamping device (31) according to any one of claims 2 to 4, characterized in that, Fixing device (40), particularly a fixing device that can be connected to the section (15), to prevent relative rotation between the section (15) and at least a portion of the clamping device (31).

6. The clamping device (31) according to any one of the preceding claims, characterized in that, At least one of the clamping members (26, 30) is a flange (27) or includes a flange (27), wherein the clamping members (26, 30) are able to attach to each other by means of a connecting member (24) arranged in the through hole (22), such that a portion of the segment (15) arranged in the through hole (22) is clamped between the flange (27) of one of the clamping members (26, 30) and the flange (27) of the other clamping member (26, 30), particularly the flange (27) of the other clamping member (26, 30).

7. The clamping device (31) according to claim 6, characterized in that, Specifically, the flange (27) of the connecting member (24) including at least one rod (32) is at least one washer (37).

8. The clamping device (31) according to any one of the preceding claims, characterized in that, One of the connecting member (24) and the clamping member (26, 30) is formed by a common member (28), and in particular the connecting member (24) is the bushing or liner, and the clamping member is the flange (27).

9. An electric generator section (15) forming part of a rotor (11) or stator (10) of an electric generator (7), comprising a connecting member (24) of a clamping device (31) according to any one of the preceding claims, the connecting member (24) being arranged in a through hole (22) of the electric generator section (5).

10. The electric generator section (15) according to claim 9, characterized in that, The connecting component (24) is pressed into the through hole (22).

11. An electric generator (7) for a wind turbine (1), comprising a stator (10) and a rotor (11), wherein, At least one section (15) of the stator (10) and / or at least one section (15) of the rotor (11) is an electric generator section (15) according to claim 9 or 10.

12. The electric generator (7) according to claim 11, characterized in that, The electric generator section (15) and at least one adjacent section (15) are connected to each other by a connecting member (24).

13. A wind turbine (1), particularly a direct-drive wind turbine, comprising an electric generator (7) according to claim 11 or 12, wherein, The wind-induced rotation of the hub (4) of the wind turbine (1) can be transmitted to the rotor (11) to generate electrical energy.

14. A method for transporting an electric generator section (15) using a clamping device (31) according to any one of claims 1 to 8, wherein, An electric generator section (15) with a through hole (22) is provided, wherein a connecting member (24) is arranged in or is arranged in the through hole (23), wherein clamping members (26, 30) are attached to each other by the connecting member (24) such that portions of the section (15) arranged in the through hole (22) are clamped between the clamping members (26, 30), wherein a connecting device (34) of at least one of the clamping members (26, 30) is connected to a connecting device of a transport device, wherein the electric generator section (15) is transported by the transport device, and the clamping device (31) serves as a mechanical interface between the electric generator section (15) and the transport device.

15. The method according to claim 14, characterized in that, After transporting the electric generator section (15), the clamping device (31) is disassembled and the connecting part (24) arranged in the through hole (22) is removed from the through hole (22).

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