MAIN SHAFT DESIGNED FOR A WIND TURBINE TURBINE AND A WIND TURBINE TURBINE

Abstract

The present application relates to the technical field of wind turbines. Provided are a main shaft for a wind turbine, and a wind turbine. The main shaft comprises a main shaft body and an assembly bracket configured to fix a cable, wherein the main shaft body is axially provided with a first flange and a second flange opposite each other, the first flange being located on the inner side of the main shaft body, and the second flange being located on the outer side of the main shaft body; and the assembly bracket is arranged inside the main shaft body, two ends of the assembly bracket being connected to the first flange and the second flange respectively, and the assembly bracket being fixedly connected to the inner wall of the main shaft body. The main shaft has an optimized structural form, thereby improving machining efficiency and shortening the production cycle.

Description

Main shaft for wind turbines and wind turbines

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024117058592, filed on November 26, 2024, entitled “Main Shaft for Wind Turbine and Wind Turbine,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of wind turbine technology, and more specifically, to a main shaft for a wind turbine and a wind turbine. Background Technology

[0004] With the increasing size of wind turbines, the wall thickness of large castings such as hubs and main shafts required for wind turbines is getting thicker and thicker, and the difficulty of casting and processing is also increasing sharply. This makes it impossible to deliver casting products on time, affecting the overall production cycle of the turbine.

[0005] As one of the four major casting components of a fan, the main shaft is the main rotating part of the transmission chain. The stress level of the main shaft is high, making it impossible to directly drill holes for wiring on the wall surface. Therefore, its internal wiring structure is generally to set multiple cast bosses on the inner wall of the main shaft, and fix the wiring board to the multiple cast bosses with bolts. In this wiring structure, the presence of cast bosses makes it impossible to form the inner side of the main shaft in one cut, making the main shaft difficult to process and the process cumbersome. Furthermore, due to the limitation of the inner wall size, the surface treatment of the bosses and the hole positioning cannot be completed by machining, but can only be achieved by fitter. The machining accuracy is poor, the operation time is long, and it seriously affects the production progress.

[0006] Application content

[0007] The purpose of this application includes, for example, providing a spindle for a wind turbine that optimizes the structural form, thereby improving processing efficiency and shortening the production cycle.

[0008] The purpose of this application also includes providing a wind turbine generator that optimizes the structure of the main shaft, thereby improving processing efficiency and shortening the production cycle.

[0009] The embodiments of this application can be implemented as follows:

[0010] An embodiment of this application provides a main shaft for a wind turbine, which includes a main shaft body and an assembly bracket configured to fix cables. The main shaft body is provided with a first flange and a second flange opposite to each other along its own axial direction. The first flange is located inside the main shaft body, and the second flange is located outside the main shaft body. The assembly bracket is disposed inside the main shaft body, and its two ends are respectively connected to the first flange and the second flange, and the assembly bracket is fixedly connected to the inner wall of the main shaft body.

[0011] Optionally, the mounting bracket is magnetically connected or bonded to the inner wall of the spindle body.

[0012] Optionally, the mounting bracket includes a first mounting bracket and a second mounting bracket, which are arranged along the axial direction of the spindle body. The end of the first mounting bracket away from the second mounting bracket is connected to the first flange, and the end of the second mounting bracket away from the first mounting bracket is connected to the second flange. The ends of the first mounting bracket and the second mounting bracket near the first mounting bracket are both fixedly connected to the inner wall of the spindle body.

[0013] Optionally, both the first and second assembly brackets include a bent component and a plate connected together. A magnetic block is provided at the end of the bent component away from the plate. The magnetic block is magnetically connected to the inner wall of the spindle body. Both the first and second assembly brackets include a first fastener. The plate in the first assembly bracket is connected to the first flange, and the plate in the second assembly bracket is connected to the second flange through the first fastener.

[0014] Optionally, a fixing piece is provided at the end of the bending member away from the magnetic block, and an oblong hole is provided on the plate, the oblong hole extending radially along the main shaft body;

[0015] Both the first assembly bracket and the second assembly bracket include a second fastener, which passes through both the fixing plate and the waist-shaped hole to fix the fixing plate and the plate relative to each other.

[0016] Optionally, the bending member includes multiple continuous bending sections, with adjacent bending sections bent relative to each other. The plate is connected to the bending section at one end, and the magnetic block is provided on the bending section at the other end.

[0017] Optionally, the included angle between any two adjacent bending sections in the first assembly bracket is smaller than the included angle between any two adjacent bending sections in the second assembly bracket.

[0018] The bent portion in the first assembly bracket is tubular, and the bent portion in the second assembly bracket includes a sheet and folded edges disposed opposite to both sides of the sheet.

[0019] Optionally, in the first assembly bracket, a connecting piece is provided at the end of the bent portion away from the plate, and the magnetic block is provided on the surface of the connecting piece facing the inner wall of the spindle body;

[0020] In the second assembly bracket, the magnetic block is disposed on the inner wall of the sheet body facing the spindle body, away from the plate.

[0021] Optionally, both the first and second assembly brackets include a third fastener. The third fastener in the first assembly bracket passes through both the magnetic block and the connecting piece to fix the magnetic block and the connecting piece relatively. The third fastener in the second assembly bracket passes through both the magnetic block and the piece to fix the magnetic block and the piece relatively.

[0022] Optionally, the bent portion in the first assembly bracket and the folded edge in the second assembly bracket are provided with through holes configured for threading cable ties.

[0023] This application also provides a wind turbine generator set, including the main shaft for the wind turbine generator set.

[0024] The beneficial effects of the wind turbine main shaft and wind turbine provided in this application embodiment include, for example: to optimize the structure of the main shaft, improve processing efficiency, and shorten the production cycle, a main shaft for a wind turbine is designed. This main shaft includes a main shaft body and an assembly bracket configured to fix cables. The main shaft body has a first flange and a second flange arranged opposite each other along its axial direction. The first flange is located inside the main shaft body, and the second flange is located outside the main shaft body. The assembly bracket is disposed inside the main shaft body, with both ends connected to the first flange and the second flange respectively, and the assembly bracket is fixedly connected to the inner wall of the main shaft body. During cable routing, connecting both ends of the assembly bracket to the first flange and the second flange respectively, and fixing the assembly bracket to the inner wall of the main shaft body, secures the assembly bracket. During cable routing, the cables are simply fixed to the assembly bracket. Because this main shaft eliminates the casting boss structure on its inner wall and directly fixes the assembly bracket to the inner wall of the main shaft body, the structure of the main shaft is optimized, processing efficiency is improved, and the production cycle is shortened. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the structure of the spindle in the prior art;

[0027] Figure 2 is a schematic diagram of the main shaft in an embodiment of this application;

[0028] Figure 3 is a cross-sectional view of the internal structure of the spindle in an embodiment of this application;

[0029] Figure 4 is a schematic diagram of the structure of the first assembly bracket in an embodiment of this application;

[0030] Figure 5 is a partial exploded view of the first assembly bracket in an embodiment of this application;

[0031] Figure 6 is a schematic diagram of the structure of the second assembly bracket in the embodiment of this application.

[0032] Icons: 100 - Spindle body; 110 - First flange; 120 - Second flange; 200 - First mounting bracket; 210 - Connecting piece; 300 - Second mounting bracket; 400 - Bending part; 410 - Magnetic block; 420 - Fixing piece; 430 - Bending part; 431 - Plate body; 432 - Folded edge; 440 - Through hole; 500 - Plate; 510 - Waist-shaped hole; 600 - First fastener; 700 - Second fastener; 800 - Third fastener; 900 - Cable. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0038] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0039] The inventors of this application discovered that the stress level of the main shaft in a wind turbine is high, making it impossible to directly drill holes for wiring on the shaft wall, as shown in Figure 1. Existing wiring structures for the main shaft 1 typically involve setting multiple cast bosses 2 on the inner wall of the main shaft 1, and fixing the wiring plate 3 to the cast bosses 2 with bolts. In this wiring structure, the presence of the cast bosses 2 prevents the inner side of the main shaft 1 from being formed in one cut, making the machining of the main shaft 1 difficult and cumbersome. Furthermore, due to the limitations of the inner wall dimensions of the main shaft 1, the surface treatment and hole positioning of the bosses 2 cannot be completed by machining and must be achieved by fitter work, resulting in poor machining accuracy, long operation time, and severely impacting production progress. The embodiments of this application provide a main shaft for a wind turbine, at least to solve the above-mentioned technical problems.

[0040] Please refer to Figures 2 and 3. The main shaft for a wind turbine provided in the embodiment of this application includes a main shaft body 100 and an assembly bracket configured to fix a cable 900. The main shaft body 100 is provided with a first flange 110 and a second flange 120 opposite to each other along its own axial direction. The first flange 110 is located inside the main shaft body 100, and the second flange 120 is located outside the main shaft body 100. The assembly bracket is disposed inside the main shaft body 100. The two ends of the assembly bracket are respectively connected to the first flange 110 and the second flange 120, and the assembly bracket is fixedly connected to the inner wall of the main shaft body 100.

[0041] The spindle body 100 is hollow inside. The first flange 110 and the second flange 120 are both integrally formed with the spindle body 100. The inner diameter of the first flange 110 is smaller than the inner diameter of the spindle body 100, and the outer diameter of the second flange 120 is larger than the outer diameter of the spindle body 100. One end of the mounting bracket is connected to the surface of the first flange 110 facing the second flange 120, and the other end of the mounting bracket is connected to the surface of the second flange 120 away from the first flange 110. The part of the mounting bracket near the middle of the spindle body 100 is magnetically connected to the inner wall of the spindle body 100. The cable 900 extends from the first flange 110 into the spindle body 100, runs along the extension direction of the mounting bracket and is fixed to the mounting bracket, and finally extends out of the spindle body 100 from the second flange 120. The two ends of the cable 900 are respectively connected to other external components.

[0042] During the wiring process, the two ends of the mounting bracket are connected to the first flange 110 and the second flange 120 respectively, and the mounting bracket is fixedly connected to the inner wall of the spindle body 100, thus fixing the mounting bracket. During wiring, the cable 900 is arranged along the extension direction of the mounting bracket and fixed on the mounting bracket. Since the spindle eliminates the cast boss structure on its inner wall and directly fixes the mounting bracket to the inner wall of the spindle body 100, the structure of the spindle is optimized, the processing efficiency is improved, and the production cycle is shortened.

[0043] In some alternative embodiments, the mounting bracket is magnetically connected or bonded to the inner wall of the spindle body 100, wherein the bonding can be achieved by a highly adhesive adhesive; or, the spindle body 100 is provided with an inner liner ring, the inner liner ring is aligned with the axis of the spindle body 100, the diameter of the inner liner ring is smaller than the inner diameter of the spindle body 100, and the inner liner ring presses and fixes the mounting bracket to the inner wall of the spindle body 100.

[0044] In this embodiment, the assembly bracket includes a first assembly bracket 200 and a second assembly bracket 300. The first assembly bracket 200 and the second assembly bracket 300 are arranged along the axial direction of the spindle body 100. The end of the first assembly bracket 200 away from the second assembly bracket 300 is connected to the first flange 110, and the end of the second assembly bracket 300 away from the first assembly bracket 200 is connected to the second flange 120. The ends of the first assembly bracket 200 and the second assembly bracket 300 near the first assembly bracket 200 are both fixedly connected to the inner wall of the spindle body 100.

[0045] By setting up independent first assembly bracket 200 and second assembly bracket 300, when installing the first assembly bracket 200, the end of the first assembly bracket 200 away from the second assembly bracket 300 is connected to the first flange 110, and the end of the first assembly bracket 200 close to the second assembly bracket 300 is fixedly connected to the inner wall of the spindle body 100; when installing the second assembly bracket 300, the end of the second assembly bracket 300 away from the first assembly bracket 200 is connected to the second flange 120, and the end of the second assembly bracket 300 close to the first assembly bracket 200 is fixedly connected to the inner wall of the spindle body 100. By installing the first assembly bracket 200 and the second assembly bracket 300 respectively, the installation difficulty is reduced.

[0046] Please refer to Figures 4-6. In this embodiment, taking the magnetic connection between the assembly bracket and the inner wall of the spindle body 100 as an example, both the first assembly bracket 200 and the second assembly bracket 300 include a bent part 400 and a plate 500 connected to each other. A magnetic block 410 is provided at the end of the bent part 400 away from the plate 500. The magnetic block 410 is magnetically connected to the inner wall of the spindle body 100. Both the first assembly bracket 200 and the second assembly bracket 300 include a first fastener 600. The plate 500 in the first assembly bracket 200 and the first flange 110, as well as the plate 500 in the second assembly bracket 300 and the second flange 120, are connected by the first fastener 600.

[0047] The plate 500 is connected to one end of the bending part 400. The magnetic block 410 has a strong magnetic attraction and a friction coefficient greater than 0.6. The magnetic block 410 is magnetically connected to the inner wall of the spindle body 100, which can play a role in preventing slippage. The number of magnetic blocks 410 can be one or more, and there is no limitation on this.

[0048] The first fastener 600 may include bolts and self-locking washers. The plate 500 in the first mounting bracket 200 is connected to the first flange 110 through the first fastener 600, and the plate 500 in the second mounting bracket 300 is also connected to the second flange 120 through the first fastener 600, which can effectively prevent the plate 500 from loosening or falling off.

[0049] It is understood that in other embodiments, the first fastener 600 may also be a snap fastener or other fastener, as long as it can fix the plate 500 in the first mounting bracket 200 to the first flange 110 and the plate 500 in the second mounting bracket 300 to the second flange 120, and there is no limitation thereto.

[0050] The magnetic block 410 can be selected based on the required attraction force and lateral sliding force through finite element analysis to meet the installation requirements of the wiring bracket inside the main shaft of different wind turbine units, and to ensure the strength and fatigue life of the overall structure of the assembly bracket.

[0051] In this embodiment, a fixing plate 420 is provided at the end of the bent part 400 away from the magnetic block 410, and a waist-shaped hole 510 is provided on the plate 500, which extends radially along the main shaft body 100; the first mounting bracket 200 and the second mounting bracket 300 both include a second fastener 700, and the second fastener 700 passes through both the fixing plate 420 and the waist-shaped hole 510 to fix the fixing plate 420 and the plate 500 relative to each other.

[0052] The opening direction of the waist-shaped hole 510 is perpendicular to the plate 500. There are two or more waist-shaped holes 510 on the plate 500. The number of second fasteners 700 included in the first mounting bracket 200 and the second mounting bracket 300 matches the number of waist-shaped holes 510. The second fasteners 700 include bolts, washers and nuts. Washers can be provided on both sides of the plate 500.

[0053] By opening a waist-shaped hole 510 on the plate 500, the bending part 400 can be adjusted in position relative to the plate 500 along the radial direction of the spindle body 100 to compensate for the design error caused by the wall thickness tolerance of the spindle body 100.

[0054] For example, four oblong holes 510 are provided on the plate 500. All four oblong holes 510 extend radially along the spindle body 100. The first mounting bracket 200 and the second mounting bracket 300 each include four second fasteners 700. The bolt in each second fastener 700 passes through the fixing plate 420 and the corresponding oblong hole 510. The nut cooperates with the bolt to fix the fixing plate 420 and the plate 500 relative to each other.

[0055] Understandably, the number of waist-shaped holes 510 can be determined according to actual needs. For example, the number of waist-shaped holes 510 can be two, three or more, and there is no limitation on this.

[0056] In this embodiment, the bending member 400 includes a series of bending sections 430, with adjacent bending sections 430 bending relative to each other. The plate 500 is connected to the bending section 430 at one end, and a magnetic block 410 is provided on the bending section 430 at the other end.

[0057] As the main load-bearing component, the bending component 400 needs to overcome the centrifugal force and deformation during the rotation of the main shaft. Therefore, the bending component 400 is designed to include multiple continuous bending sections 430, which can reduce deformation to a certain extent during the rotation of the main shaft, ensure the rotational rigidity of the mounting bracket, and prevent the cable 900 from breaking due to excessive deformation.

[0058] For example, the bending member 400 includes three consecutive bending sections 430, with the middle bending section 430 being inclined and the other two bending sections 430 extending in opposite directions, and the two adjacent bending sections 430 transitioning smoothly.

[0059] Understandably, the number of bends 430 can be determined according to actual needs. For example, the number of bends 430 can be more than four, and there is no limitation on this.

[0060] In this embodiment, the included angle between any two adjacent bending portions 430 in the first assembly bracket 200 is smaller than the included angle between any two adjacent bending portions 430 in the second assembly bracket 300; the bending portion 430 in the first assembly bracket 200 is tubular, and the bending portion 430 in the second assembly bracket 300 includes a sheet 431 and folded edges 432 disposed opposite to each other on both sides of the sheet 431.

[0061] It should be noted that the included angle between any two adjacent bending sections 430 in the first assembly bracket 200 is basically equal, and the included angle between any two adjacent bending sections 430 in the second assembly bracket 300 is basically equal. The plate 500 in the first assembly bracket 200 is connected to the inner side of the first flange 110, so the bending degree between adjacent bending sections 430 is larger and the included angle between adjacent bending sections 430 is smaller. The plate 500 in the second assembly bracket 300 is connected to the inner side of the second flange 120, so the bending degree between adjacent bending sections 430 is smaller and the included angle between adjacent bending sections 430 is larger. That is, the included angle between any two adjacent bending sections 430 in the first assembly bracket 200 is smaller than the included angle between any two adjacent bending sections 430 in the second assembly bracket 300.

[0062] Since the included angle between two adjacent bending sections 430 in the second assembly bracket 300 is small, the bending section 430 in the second assembly bracket 300 is designed to include a sheet 431 and a folded edge 432 perpendicular to the sheet 431. This can ensure the stiffness requirements in different directions during the rotation of the spindle and reduce deformation to a certain extent. Since the bending degree between two adjacent bending sections 430 in the first assembly bracket 200 is large, the bending section 430 is designed to be tubular. For example, a steel pipe with good circumferential stiffness can be used to make the bending part 400 to further strengthen the resistance to deformation that may occur during the rotation of the spindle.

[0063] In the first assembly bracket 200, a connecting piece 210 is provided at the end of the bent portion 430 away from the plate 500, and a magnetic block 410 is provided on the surface of the connecting piece 210 facing the inner wall of the spindle body 100. A fixing piece 420 is provided at the end of the bent portion 430 near the plate 500. In the second assembly bracket 300, the magnetic block 410 is provided on the surface of the plate body 431 away from the plate 500 facing the inner wall of the spindle body 100, and a fixing piece 420 is provided on the plate body 431 near the plate 500. The fixing piece 420 can be integrally formed with the plate body 431 and is formed by bending relative to the plate body 431.

[0064] The side of the connecting piece 210 facing the inner wall of the spindle body 100 and the side of the piece 431 away from the plate 500 facing the inner wall of the spindle body 100 are the adsorption sides. The side of the connecting piece 210 away from the inner wall of the spindle body 100 and the side of the piece 431 away from the plate 500 are the shielding sides. The connecting piece 210 and the piece 431 away from the plate 500 are respectively adsorbed and fixed to the inner wall of the spindle body 100 by the magnetic block 410 on the adsorption side. The shielding sides of the connecting piece 210 and the piece 431 away from the plate 500 have no attraction force and do not interfere with the signal of the cable 900.

[0065] In this embodiment, both the first assembly bracket 200 and the second assembly bracket 300 include a third fastener 800. The third fastener 800 in the first assembly bracket 200 is provided with both a magnetic block 410 and a connecting piece 210 to fix the magnetic block 410 and the connecting piece 210 relative to each other. The third fastener 800 in the second assembly bracket 300 is provided with both a magnetic block 410 and a piece 431 to fix the magnetic block 410 and the piece 431 relative to each other.

[0066] The third fastener 800 may include a stud, a nut, and a washer. The stud in the first mounting bracket 200 passes through the connecting piece 210 and connects to the magnetic block 410. The nut cooperates with the stud to fix the magnetic block 410 and the connecting piece 210 relatively. The stud in the second mounting bracket 300 passes through the plate 431 and connects to the magnetic block 410. The nut cooperates with the stud to fix the magnetic block 410 and the plate 431 relatively.

[0067] In this embodiment, both the bent portion 430 in the first assembly bracket 200 and the folded edge 432 in the second assembly bracket 300 are provided with through holes 440 configured for threading cable ties.

[0068] In the first assembly bracket 200, multiple through holes 440 are spaced apart along the side of the multiple bends 430. Each through hole 440 is configured to accommodate a cable tie, which passes through the through hole 440 and fixes the cable 900 to the bend 430. In the second assembly bracket 300, multiple through holes 440 are spaced apart along the extension direction of the folded edges 432 on both sides of the sheet 431. Two through holes 440 at corresponding positions on the two folded edges 432 are configured to accommodate the same cable tie, which passes through the through hole 440 and fixes the cable 900 to the sheet 431.

[0069] The technical advantages of the main shaft for wind turbine units provided in this application embodiment include at least the following: the main shaft requires less additional machining, has low manufacturing cost, and is suitable for mass production; the main shaft is applicable to various types and different megawatt levels of wind turbine units, such as doubly-fed and semi-direct-drive models; the main shaft eliminates internal wiring bosses, reducing machining requirements and significantly improving production efficiency, thereby greatly shortening the production cycle of a single main shaft; the main body of the mounting bracket adopts the form of a bent part 400, which can effectively overcome the slippage and deformation of the mounting bracket during the rotation of the main shaft, ensuring the stability and safety of the mounting bracket and cable 900; the oblong hole 510 on the plate 500 can effectively adjust the relative height of the bent part 400, thereby offsetting the design error caused by the wall thickness tolerance of the main shaft.

[0070] The embodiments of this application also provide a wind turbine generator set, including the main shaft for the wind turbine generator set described above. The technical effects of this wind turbine generator set are roughly the same as those of the main shaft for the wind turbine generator set, and will not be described again here.

[0071] In summary, the embodiments of this application provide a main shaft for a wind turbine and a wind turbine. During the wiring process, the end of the first mounting bracket 200 away from the second mounting bracket 300 is connected to the first flange 110, and the end of the first mounting bracket 200 close to the second mounting bracket 300 is directly fixedly connected to the inner wall of the main shaft body 100. The end of the second mounting bracket 300 away from the first mounting bracket 200 is connected to the second flange 120, and the end of the second mounting bracket 300 close to the first mounting bracket 200 is directly fixedly connected to the inner wall of the main shaft body 100. The cable 900 is arranged along the arrangement direction of the first mounting bracket 200 and the second mounting bracket 300 and fixed to the first mounting bracket 200 and the second mounting bracket 300. This main shaft, by eliminating the cast boss structure, optimizes the structural form of the main shaft, improves processing efficiency, and shortens the production cycle.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A main shaft intended for a wind power plant, characterized in that it comprises a main portion (100) of the main shaft and a mounting support for placing and securing a wire (900); in the axial direction of the main portion (100) of the main shaft itself, a first flange (110) and a second flange (120) are arranged opposite to each other, wherein the first flange (110) is arranged on the inner side of the main portion (100) of the main shaft, and the second flange (120) is arranged on the outer side of the main portion (100) of the main shaft; the mounting support is installed in the inner part of the main portion (100) of the main shaft; the mounting support is connected at both ends respectively to the first flange (110) and the second flange (120), and the mounting support is fixedly connected to the inner wall of the main portion (100) of the main shaft.

2. The main shaft intended for a wind turbine installation according to claim 1, characterized in that the mounting support is connected to the inner wall of the main part (100) of the main shaft by means of magnetic attraction or adhesion.

3. The main shaft for a wind power plant according to claim 1, characterized in that the mounting support comprises a first mounting support (200) and a second mounting support (300); the first mounting support (200) and the second mounting support (300) are located in the axial direction of the main portion (100) of the main shaft; the first mounting support (200) is connected with one end, remote from the second mounting support (300), to the first flange (110); the second mounting support (300) is connected with one end, remote from the first mounting support (200), to the second flange (120); the first mounting support (200) with one end, located closer to the second mounting support (300), and the second mounting support (300) with one end, located closer to the first mounting support (200), are fixedly connected to the inner wall of the main portion (100) of the main shaft.

4. The main shaft for a wind power plant according to claim 3, wherein the first mounting support (200) and the second mounting support (300) comprise a curved member (400) and a plate-shaped member (500) connected to each other; the curved member (400) is provided with a magnetic element (410) at one end remote from the plate-shaped member (500); the magnetic element (410) is connected to the inner wall of the main part (100) of the main shaft by magnetic attraction; the first mounting support (200) and the second mounting support (300) comprise first fastening elements (600); by means of the first fastening elements (600), the element (500) in the form of a plate of the first mounting support (200) is connected to the first flange (110), and the element (500) in the form of a plate of the second mounting support (300) is connected to the second flange (120).

5. A main shaft for a wind power plant according to claim 4, characterized in that the curved element (400) is provided with a fastening plate (420) at one end remote from the magnetic element (410); the element (500) in the form of a plate is provided with oblong holes (510); the oblong holes (510) extend in the radial direction of the main part (100) of the main shaft; the first mounting support (200) and the second mounting support (300) comprise second fastening elements (700); the second fastening elements (700) are passed through both the fastening plate (420) and the oblong holes (510) to ensure fixed fixation between the fastening plate (420) and the plate-shaped element (500).

6. The main shaft for a wind power plant according to claim 4, characterized in that the curved element (400) comprises several parts (430) of the curved element arranged in series, wherein two adjacent parts (430) of the curved element are made with a bend relative to each other; the element (500) in the form of a plate is connected to the part (430) of the curved element located at one end, wherein a magnetic element (410) is placed on the part (430) of the curved element located at the other end.

7. The main shaft for a wind power plant according to claim 6, characterized in that the angle between any two adjacent parts (430) of the curved element of the first mounting support (200) is less than the angle between any two adjacent parts (430) of the curved element of the second mounting support (300); the part (430) of the curved element of the first mounting support (200) is made tubular; the part (430) of the curved element of the second mounting support (300) comprises a flat section (431) and bent edges (432) located opposite each other on both sides of the flat section (431).

8. The main shaft for a wind power plant according to claim 7, characterized in that in the first mounting support (200) the end portion of the part (430) of the curved element, remote from the element (500) in the form of a plate, is provided with a connecting plate (210); the magnetic element (410) is located on the surface of the connecting plate (210), facing the inner wall of the main part (100) of the main shaft; in the second mounting support (300) the magnetic element (410) is located on the surface facing the inner wall of the main part (100) of the main shaft, a flat section (431) remote from the element (500) in the form of a plate.

9. The main shaft for a wind power plant according to claim 8, wherein the first mounting support (200) and the second mounting support (300) comprise third fastening elements (800); the third fastening elements (800) of the first mounting support (200) are passed through both the magnetic element (410) and the connecting plate (210) to ensure fixed fixation between the magnetic element (410) and the connecting plate (210); the third fastening elements (800) of the second mounting support (300) are passed through both the magnetic element (410) and the flat section (431) to ensure fixed fixation between the magnetic element (410) and the flat section (431).

10. The main shaft, intended for a wind power plant, according to claim 7, characterized in that the parts (430) of the curved element of the first mounting support (200) and the bent edges (432) of the second mounting support (300) are provided with through holes (440) made with the possibility of passing ties.

11. A wind power plant, characterized in that it contains a main shaft intended for a wind power plant, according to any of paragraphs 1-10.