Transmission structure of wind turbine generator

Abstract

The embodiment of the utility model provides a transmission structure of a wind turbine generator, and relates to the technical field of wind power generation. The transmission structure comprises a shaft body which is of a hollow cylindrical structure, and the shaft body is connected with a transmission connector of a wind wheel and a transmission connector of a gear box. The reinforcing rib sets are used for being fixed to the inner circumferential wall of the shaft body, and every two reinforcing rib sets are arranged in the length direction of the shaft body at intervals. According to the transmission structure of the wind turbine generator set, the hollow cylindrical structure of the shaft body and the reinforcing rib sets arranged at intervals in the axial direction form a composite anti-torsion structure, the reliability of the wind turbine generator set under the extreme wind condition is improved, the service life of the wind turbine generator set under the extreme wind condition is prolonged, the maintenance requirement is reduced, and the overall performance of the wind turbine generator set is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation, in particular to a transmission structure of a wind turbine. BACKGROUND

[0002] A wind turbine is a device that converts the kinetic energy of wind into electrical energy, and has the advantages of being clean, renewable and economical.

[0003] The existing wind turbine includes a gearbox, a transmission shaft and a wind wheel. The wind wheel rotates under the wind and transmits to the gearbox through the transmission shaft. However, in some situations, the aerodynamic force on the wind wheel will increase sharply, causing the transmission shaft to bear a large torsional force, which is easy to cause plastic deformation of the transmission shaft, and even cause bending. CONTENT OF THE INVENTION

[0004] The embodiment of the present application provides a transmission structure of a wind turbine, which forms a composite torsion-resistant structure through the hollow cylindrical structure of the shaft body and the reinforcing rib groups arranged along the axial direction, improves the reliability and service life of the wind turbine under extreme wind conditions, reduces the maintenance requirement, and improves the overall performance of the wind turbine.

[0005] The embodiment of the present application provides a transmission structure of a wind turbine, which includes: a shaft body in a hollow cylindrical structure, the shaft body is connected to the transmission interfaces of the wind wheel and the gearbox respectively; a plurality of reinforcing rib groups are used to be fixed to the inner peripheral wall of the shaft body, and the plurality of reinforcing rib groups are arranged in pairs along the length direction of the shaft body.

[0006] In a possible implementation, the reinforcing rib group includes:

[0007] A first reinforcing rib, two ends of the first reinforcing rib are connected to the inner peripheral wall of the shaft body.

[0008] In a possible implementation, the first reinforcing rib of each reinforcing rib group can be provided with a plurality of,

[0009] Two arbitrary first reinforcing ribs are staggered connected; or,

[0010] There is a spacing between two arbitrary first reinforcing ribs.

[0011] In a possible implementation, the transmission structure of the wind turbine further includes a first reinforcing connecting piece, the first reinforcing connecting piece is used to connect the inner wall of the shaft body,

[0012] The end of the first reinforcing rib is connected to the first reinforcing connecting piece.

[0013] In a possible implementation, the first reinforcing connector comprises a main body, the main body is annular, and the main body is provided with a plurality of connecting positions for connecting the first reinforcing ribs,

[0014] The thickness of the connecting position is greater than the thickness of the main body.

[0015] In a possible implementation, in a first reference plane, the radial cross-sectional dimension of the end of the first reinforcing rib is greater than the radial cross-sectional dimension of the center thereof, and the first reference plane is perpendicular to the first reinforcing rib.

[0016] In a possible implementation, the distance between any two adjacent reinforcing rib groups is equal.

[0017] In a possible implementation, the transmission structure of the wind turbine generator further comprises a second reinforcing rib, and the end of the second reinforcing rib is arranged to be fixed on the inner circumferential wall of the shaft body,

[0018] In a second reference plane, the second reinforcing rib is at a preset angle with respect to the axis of the shaft body, and the second reference plane is parallel to the axis of the shaft body.

[0019] In a possible implementation, the second reinforcing rib is connected to any first reinforcing rib of at least one reinforcing rib group.

[0020] In a possible implementation, a plurality of second reinforcing ribs can be provided, and the plurality of second reinforcing ribs are staggered at the middle part of the shaft body.

[0021] The transmission structure of the wind turbine generator provided by the embodiments of the present application forms a composite torsion-resistant structure through the hollow cylindrical structure of the shaft body and the reinforcing rib groups arranged at intervals along the axial direction. The design of the hollow cylindrical structure of the shaft body can reduce the self-weight while maintaining sufficient strength. The reinforcing rib groups are fixed on the inner circumferential wall of the shaft body to enhance the torsional stiffness of the shaft body. The plurality of reinforcing rib groups are distributed at intervals along the length direction of the shaft body to form a gradient stress conduction path, effectively dispersing and transmitting the torsional stress and avoiding stress concentration. In this way, the structure design enables the transmission shaft to maintain stability when bearing a large torsional force, thereby preventing plastic deformation or bending and improving the reliability and service life of the wind turbine generator under extreme wind conditions, reducing the maintenance requirement, and improving the overall performance of the wind turbine generator. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the specification.

[0023] Figure 1 The structure diagram of the reinforcing rib group in the first embodiment of the transmission structure of the wind turbine generator provided by the present application is shown in the figure.

[0024] Figure 2 A schematic diagram of the reinforcing rib group in the second embodiment of the transmission structure of the wind turbine provided in this application;

[0025] Figure 3 A schematic diagram of the reinforcing rib group in the third embodiment of the transmission structure of the wind turbine provided in this application;

[0026] Figure 4 Schematic diagram of the arrangement of the reinforcing ribs and the second reinforcing ribs in the transmission structure of the wind turbine provided in this application Figure 1 ;

[0027] Figure 5 Schematic diagram of the arrangement of the reinforcing ribs and the second reinforcing ribs in the transmission structure of the wind turbine provided in this application Figure 2 ;

[0028] Figure 6 Schematic diagram of the arrangement of the reinforcing ribs and the second reinforcing ribs in the transmission structure of the wind turbine provided in this application Figure 3 ;

[0029] Figure 7 Schematic diagram of the arrangement of the reinforcing ribs and the second reinforcing ribs in the transmission structure of the wind turbine provided in this application Figure 4 ;

[0030] Figure 8 Schematic diagram of the arrangement of the reinforcing ribs and the second reinforcing ribs in the transmission structure of the wind turbine provided in this application Figure 5 ;

[0031] Figure 9 Schematic diagram of the arrangement of the reinforcing ribs and the second reinforcing ribs in the transmission structure of the wind turbine provided in this application Figure 6 .

[0032] Explanation of reference numerals in the attached figures:

[0033] 100-shaft body;

[0034] 200 - Reinforcing rib group; 210 - First reinforcing rib; 220 - First reinforcing connector; 221 - Main body; 222 - Connection position;

[0035] 300 - Second reinforcing rib.

[0036] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0038] A wind turbine generator set (or simply wind turbine) is a device that converts the kinetic energy of wind into electrical energy, offering advantages such as cleanliness, renewability, and high economic efficiency. Existing wind turbine generator sets consist of a gearbox, a drive shaft, and a rotor. The rotor rotates under wind pressure and transmits the energy to the gearbox via the drive shaft.

[0039] However, in some situations, such as turbulence or extreme wind conditions, the aerodynamic forces on the wind turbine will increase sharply, causing the transmission bearing to be subjected to large torsional forces, which can easily lead to plastic deformation of the transmission shaft or even bending.

[0040] To address the aforementioned issues, this application provides a transmission structure for a wind turbine. This structure utilizes a hollow cylindrical shaft and axially spaced reinforcing ribs to form a composite anti-torsional structure. The hollow cylindrical shaft design reduces weight while maintaining sufficient strength. The reinforcing ribs are fixed to the inner circumferential wall of the shaft, enhancing its torsional stiffness. Multiple reinforcing ribs, spaced along the shaft's length, create a gradient stress transmission path, effectively dispersing and transferring torsional stress and preventing stress concentration. This structural design allows the transmission shaft to maintain stability even under significant torsional forces, preventing plastic deformation or bending. This improves the reliability and service life of the wind turbine under extreme wind conditions, reduces maintenance requirements, and enhances the overall performance of the wind turbine.

[0041] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0042] The following will combine Figures 1 to 9 The embodiments of this application will be described below.

[0043] Reference Figures 4 to 9 As shown in the embodiment of this application, a transmission structure for a wind turbine includes a shaft 100 and multiple reinforcing rib groups 200. The shaft 100 has a hollow cylindrical structure and is connected to the transmission interfaces of the wind turbine and the gearbox. The reinforcing rib groups 200 are fixed to the inner circumferential wall of the shaft 100, and the multiple reinforcing rib groups 200 are arranged at intervals along the length of the shaft 100.

[0044] Optionally, the shaft 100 can be made of alloy steel, carbon fiber composite material, etc. It is understood that the hollow cylindrical structure can reduce weight while ensuring the strength of the shaft 100 and improving torsional resistance.

[0045] Among them, the reinforcing rib group 200 is a reinforcing structure fixed to the inner peripheral wall of the shaft 100. Specifically, it can be fixed by welding or bolt connection. Multiple reinforcing rib groups 200 are arranged in pairs along the length of the shaft 100 to form distributed support, thereby improving the overall rigidity of the shaft 100 by dispersing torsional stress.

[0046] Optionally, the distance between each pair of stiffener groups 200 can be equal or unevenly distributed. In actual design, the spacing between stiffener groups 200 can be determined based on the length of the shaft 100 and the maximum torque expected to be borne. In some examples, such as at stress concentration points on the shaft 100, the stiffener groups 200 can be arranged more densely.

[0047] Thus, the hollow cylindrical structure of the shaft 100 and the axially spaced reinforcing ribs 200 form a composite anti-torsional structure. The hollow cylindrical shaft 100 design reduces its weight while maintaining sufficient strength. The reinforcing ribs 200 are fixed to the inner circumferential wall of the shaft 100, enhancing its torsional stiffness. Multiple reinforcing ribs 200 are spaced apart along the length of the shaft 100, forming a gradient stress transmission path that effectively disperses and transmits torsional stress, preventing stress concentration. This structural design allows the drive shaft to maintain stability even under large torsional forces, preventing plastic deformation or bending, improving the reliability and service life of the wind turbine under extreme wind conditions, reducing maintenance requirements, and enhancing the overall performance of the wind turbine.

[0048] In some embodiments, combined with Figures 1 to 3 The reinforcing rib group 200 includes a first reinforcing rib 210, the two ends of which are respectively connected to the inner peripheral wall of the shaft 100.

[0049] The first reinforcing rib 210 can be a straight rod-shaped metal structure, with its length direction forming an angle with the axis of the shaft 100. Optionally, the two ends of the first reinforcing rib 210 can be fixed to a predetermined position on the inner peripheral wall by welding or bolting.

[0050] Optionally, the first reinforcing rib 210 can be made of a metallic material, such as steel or aluminum alloy. Among them, titanium alloy can provide 30% higher yield strength than ordinary steel at the same weight, increasing the load-bearing capacity of the shaft by 100 units of mass.

[0051] Optionally, the first stiffener 210 can be designed as an I-shaped section. The I-shaped section design can make the stiffener maintain section stability when subjected to axial pressure and avoid local buckling.

[0052] Specifically, the fixation of the two ends of the first reinforcing rib 210 to the inner peripheral wall of the shaft 100 forms a closed-loop force transmission path. When the wind turbine transmits torsional torque, the shear force of the inner wall of the shaft 100 is dispersed and transmitted through the end connection point of the first reinforcing rib 210.

[0053] Thus, the first reinforcing rib 210 connects to the inner peripheral wall of the shaft 100, forming a stable support structure that can disperse and transfer the stress acting on the shaft 100, making the shaft 100 more resistant to deformation when subjected to torsional and bending forces. This reduces the risk of plastic deformation or bending of the drive shaft. In addition, it can improve the rigidity of the shaft 100, reduce vibration and noise, and thus improve the overall performance and service life of the wind turbine.

[0054] In some embodiments, combined with Figures 1 to 3 Each reinforcing rib group 200 may have multiple first reinforcing ribs 210, with two arbitrary first reinforcing ribs 210 being staggered; or, there may be a gap between two arbitrary first reinforcing ribs 210.

[0055] The multiple first reinforcing ribs 210, which are interlaced, form a cross-network layout. The extension directions of adjacent reinforcing ribs are not parallel in space. Optionally, the cross angle can be set from 30° to 150°, for example, an orthogonal 90° cross. The multiple first reinforcing ribs 210, which are spaced apart, can be distributed at intervals on the radial section of the shaft 100.

[0056] In some examples, staggered connections and spacing can be combined, meaning that the same stiffener group 200 may have both intersecting and axially spaced first stiffeners 210. For example, four first stiffeners 210 can be provided on the inner peripheral wall of the shaft 100, with two first stiffeners 210 intersecting in an "X" shape, and the other two first stiffeners 210 arranged parallel to each other and maintaining a certain distance between them. This design can enhance the torsional and bending resistance of the shaft 100. Specific designs can be selected according to actual usage requirements and are not limited here.

[0057] In this way, the staggered reinforcing ribs form a grid structure, improving the overall rigidity of the shaft 100; the spaced reinforcing ribs disperse stress and reduce stress concentration. This structural design allows the drive shaft to maintain stability even when subjected to large torsional forces, effectively preventing plastic deformation and bending.

[0058] In some embodiments, combined with Figures 1 to 3 The transmission structure of the wind turbine also includes a first reinforcing connector 220, which is used to connect to the inner wall of the shaft 100, and the end of the first reinforcing rib 210 is connected to the first reinforcing connector 220.

[0059] Optionally, the first reinforcing connector 220 may be fixed to the shaft 100 by bolts or welding.

[0060] The main body 221 of the first reinforcing connector 220 can be annular or plate-shaped. The first reinforcing connector 220 is used to fit against the inner peripheral wall surface of the shaft 100. The main body 221 of the first reinforcing connector 220 can be provided with a connecting position 222 for connecting the first reinforcing rib 210. Optionally, the thickness of the connecting position 222 is increased by 30%-50% compared to the main body 221.

[0061] Optionally, the end of the first reinforcing rib 210 can be fixed to the connection position 222 by bolts or welding.

[0062] Optionally, the material of the first reinforcing connector 220 may be the same as that of the first reinforcing rib 210, such as metal materials, such as steel or aluminum alloy.

[0063] Thus, the first reinforcing connector 220 strengthens the connection between the first reinforcing rib 210 and the shaft 100, improving the stability of the entire transmission structure. Through the above technical solution, this application enhances the connection strength between the first reinforcing rib 210 and the shaft 100 by connecting the inner wall of the shaft 100 and the end of the first reinforcing rib 210 with the first reinforcing connector 220. This design disperses stress during transmission, reduces stress concentration, and improves the overall strength and stability of the transmission structure.

[0064] In addition, the first reinforcing connector 220 facilitates the installation and disassembly of the first reinforcing rib 210, improving the maintainability of the transmission structure.

[0065] In some embodiments, combined with Figures 1 to 3 The first reinforcing connector 220 includes a main body 221, which is annular. The main body 221 is provided with a plurality of connection positions 222 for connecting the first reinforcing rib 210. The thickness of the connection position 222 is greater than the thickness of the main body 221.

[0066] Optionally, the thickness of the connecting part 222 is increased by 30%-50% compared to the body 221.

[0067] The main body 221 has a ring structure, and multiple connecting positions 222 are distributed along the circumference of the main body 221. The thickness of the connecting positions 222 can be formed by local thickening. The radial cross-sectional dimension of the connecting position 222 is larger than the radial cross-sectional dimension of the main body 221, which increases the thickness of the end contact area between the connecting position 222 and the first reinforcing rib 210.

[0068] Specifically, the annular structure of the main body 221 is fixed to the inner peripheral wall of the shaft 100, and the connection position 222 is locally thickened to form a protruding structure. The end of the first reinforcing rib 210 is fixed to the protruding area of ​​the connection position 222. The increased thickness increases the contact area between the connection position 222 and the first reinforcing rib 210, thereby enhancing the stress dispersion capability. When the shaft 100 is subjected to torsional force, the thickened area of ​​the connection position 222 can withstand greater shear force, preventing the connection from breaking due to stress concentration.

[0069] The above design enhances the connection strength between the first reinforcing connector 220 and the first reinforcing rib 210, improving the overall rigidity of the transmission structure. The thickened design of the connection position 222 reduces stress concentration and extends the service life of the transmission structure.

[0070] In some embodiments, combined with Figures 1 to 3 Within the first reference plane, the radial cross-sectional dimension of the end of the first reinforcing rib 210 is larger than the radial cross-sectional dimension of its center, and the first reference plane is perpendicular to the first reinforcing rib 210.

[0071] The first reference plane is a plane perpendicular to the extension direction of the first reinforcing rib 210, and the radial cross-sectional dimension is defined as the width or thickness of the cross-section along the radial direction of the shaft 100. The radial cross-sectional dimension at the end can be achieved by local thickening or setting a trapezoidal structure, for example, the width at the end gradually increases from the center to both ends.

[0072] Specifically, because the cross-sectional dimension at the end of the first stiffener 210 is larger than that in the central region, the stress distribution at the connection is more uniform, reducing the risk of local deformation caused by stress concentration. For example, the end of the first stiffener 210 adopts a tapered structure, which increases the bending section modulus of the end region when transmitting torque, further suppressing the generation of cracks.

[0073] Optionally, in some examples, the first stiffener 210 may adopt a variable cross-section design, with a larger end cross-section and a smaller center cross-section. For example, the end of the first stiffener 210 may be designed as a rectangular cross-section, and the center portion may be designed as a circular or elliptical cross-section.

[0074] In some embodiments, combined with Figures 4 to 8 The distance between any two adjacent reinforcing bar groups 200 is equal.

[0075] Thus, the stiffener groups 200 are evenly distributed at fixed intervals along the length of the shaft 100. The restraining effect of each stiffener group 200 on the inner wall of the shaft 100 covers the same length of the shaft segment, so that the torsional stress is evenly distributed throughout the entire length of the shaft 100. When subjected to sudden loads, each stiffener group 200 synchronously shares the impact energy, avoiding bending in unsupported areas due to excessively large local spacing.

[0076] By uniformly arranging multiple reinforcing rib groups 200 inside the shaft 100, the overall structural strength of the shaft 100 is effectively enhanced, enabling the shaft 100 to better resist the torsional force transmitted by the wind turbine and reducing the risk of plastic deformation. In addition, the equidistant arrangement between adjacent reinforcing rib groups 200 ensures that the stress on all parts of the shaft 100 is uniform, avoiding local stress concentration and improving the reliability and service life of the transmission structure.

[0077] In some embodiments, combined with Figure 9 The distance between each pair of multiple reinforcing rib groups 200 near the middle of the shaft 100 is smaller than the distance between each pair of multiple reinforcing rib groups 200 near the end of the shaft 100.

[0078] Multiple reinforcing ribs 200 are concentrated in the middle of the shaft 100 to reinforce the maximum bending moment area of ​​the drive shaft, further improving the structural stability of the shaft 100 when subjected to torsional force and avoiding local plastic deformation caused by stress concentration.

[0079] In some embodiments, combined with Figures 4 to 9 The transmission structure of the wind turbine also includes a second reinforcing rib 300. The end of the second reinforcing rib 300 is fixed on the inner peripheral wall of the shaft 100. In the second reference plane, that is, in the reference plane parallel to the axis of the shaft 100, the second reinforcing rib 300 forms a preset angle with the axis of the shaft 100.

[0080] Optionally, the connection between the second reinforcing rib 300 and the shaft 100 can be welding, bolting, etc.

[0081] Optionally, the preset angle between the second reinforcing rib 300 and the peripheral wall of the shaft 100 can be 30°-60°.

[0082] Optionally, the second reinforcing rib 300 is connected to at least one first reinforcing rib 210. In some examples, the second reinforcing rib 300 may be connected to the first reinforcing rib 210 of a certain reinforcing rib group 200; in some examples, the second reinforcing rib 300 may also be connected to the first reinforcing ribs 210 of multiple reinforcing rib groups 200 simultaneously. Optionally, the connection method between the second reinforcing rib 300 and the first reinforcing rib 210 may be welding, integral molding, etc.

[0083] Specifically, the second reinforcing rib 300 extends along the inclined direction and forms an angle with the axis of the shaft 100. When the shaft 100 is subjected to torsional force, the inclined structure of the second reinforcing rib 300 decomposes the torsional force into axial and radial components, reducing stress concentration in one direction.

[0084] When multiple second stiffeners 300 are arranged symmetrically at an angle, a spatial truss structure is formed, which improves the torsional stiffness of the structure. The interlaced mesh of second stiffeners 300 in the middle of the shaft 100 can cover the area of ​​maximum bending moment of the shaft 100. The extension direction of the inclined stiffeners and the first stiffeners 210 form multi-directional support, which avoids plastic deformation of the local structure due to stress concentration.

[0085] Thus, by setting an inclined second reinforcing rib 300 structure inside the drive shaft, when the shaft 100 is subjected to torsional force, the stress is dispersed to the cross-shaped reinforcing ribs, thereby reducing the risk of plastic deformation in local areas of the shaft 100; furthermore, the angle structure formed by the second reinforcing rib 300 and the axis of the shaft 100 can generate an axial component force, thereby offsetting part of the torsional torque and preventing the drive shaft from bending and failing under extreme wind loads.

[0086] In some embodiments, combined with Figures 4 to 9 The second reinforcing rib 300 connects to any of the first reinforcing ribs 210 of at least one reinforcing rib group 200.

[0087] In some examples, the second reinforcing rib 300 may be connected to the first reinforcing rib 210 of a certain reinforcing rib group 200; in some examples, the second reinforcing rib 300 may also be connected to the first reinforcing ribs 210 of multiple reinforcing rib groups 200 simultaneously. Optionally, the connection method between the second reinforcing rib 300 and the first reinforcing rib 210 may be welding, integral molding, bolt connection, etc.

[0088] Specifically, the second reinforcing rib 300 and the first reinforcing rib 210 form a cross-support structure in the radial plane of the shaft 100, and multiple second reinforcing ribs 300 can form an interlaced grid-like frame in the middle region of the shaft 100.

[0089] When the wind turbine transmits torsional load, the second reinforcing rib 300 decomposes part of the torsional stress into axial and tangential components through the tilt angle. The axial component is transmitted to the end of the shaft 100 through the first reinforcing rib 210, and the tangential component is balanced by a couple formed by adjacent second reinforcing ribs 300.

[0090] The cross connection between the second stiffener 300 and the first stiffener 210 expands the load transfer path from a single radial direction to a three-dimensional mesh, forming multiple triangular stabilizing units in the middle of the shaft 100. This reduces the risk of structural deformation or fracture due to excessive local stress. The staggered connection in the middle region further optimizes the torsional performance of the shaft 100 under complex loads.

[0091] In some embodiments, combined with Figures 5 to 8 The second reinforcing rib 300 can be fixed to any adjacent second reinforcing rib 300. In this way, the torsional resistance of the shaft 100 is further enhanced.

[0092] In some embodiments, combined with Figure 8 Multiple second reinforcing ribs 300 are provided on the inner peripheral wall of the shaft body 100, and the multiple second reinforcing ribs 300 are staggered in the middle of the shaft body 100.

[0093] Optionally, the staggered form of the multiple second reinforcing ribs 300 includes X-shaped intersections, mesh intersections, etc., and the staggered angle can be 30 degrees to 60 degrees.

[0094] Multiple second reinforcing ribs 300 are staggered in the middle of the shaft 100 to form a mesh frame. This frame works together with the first reinforcing ribs 210 group 200 to convert the torsional moment into multi-directional tensile and compressive forces. The staggered angles allow the load to be distributed and transmitted in different directions, avoiding stress concentration at a single point.

[0095] In addition, the structure of multiple second reinforcing ribs 300 intersecting in the middle of the shaft 100 strengthens the maximum bending moment area of ​​the drive shaft, further improving the structural stability of the shaft 100 when subjected to torsional force and avoiding local plastic deformation caused by stress concentration.

[0096] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A drive train of a wind turbine generator, characterized in that, The application relates to a shaft body (100) connected with the transmission interface of a wind wheel and a gear box, and a plurality of reinforcing rib groups (200) fixed on the inner wall of the shaft body (100). The reinforcing rib groups (200) comprise first reinforcing ribs (210) connected with the inner wall of the shaft body (100). Each first reinforcing rib (210) of the reinforcing rib groups (200) can be provided with a plurality of, 2. The drive train of a wind turbine generator according to claim 1, wherein, Any two first reinforcing ribs (210) are staggered; or, Any two first reinforcing ribs (210) are spaced apart.

3. The drive train of a wind turbine generator according to claim 2, wherein, The first reinforcing connector (220) is used for connecting the inner wall of the shaft body (100), The end of the first reinforcing rib (210) is connected with the first reinforcing connector (220). The first reinforcing connector (220) comprises a main body (221) in the shape of a ring, and the main body (221) is provided with a plurality of connecting positions (222) for connecting the first reinforcing ribs (210), 4. The drive train of a wind turbine generator according to claim 2, wherein The thickness of the connecting position (222) is greater than the thickness of the main body (221). In a first reference plane perpendicular to the first reinforcing rib (210), the radial cross-sectional dimension of the end of the first reinforcing rib (210) is greater than the radial cross-sectional dimension of the center of the first reinforcing rib (210).

5. The drive train of a wind turbine generator as set forth in claim 4, wherein The distance between any two adjacent reinforcing rib groups (200) is equal. The second reinforcing rib (300) is used for fixing the end of the second reinforcing rib (300) on the inner wall of the shaft body (100), 6. The drive train of a wind turbine generator as set forth in claim 4, wherein In a second reference plane parallel to the axis of the shaft body (100), the second reinforcing rib (300) is at a preset angle with the axis of the shaft body (100).

7. A drive train arrangement for a wind turbine generator according to any of claims 1-6, characterized in that The second reinforcing rib (300) is connected with any first reinforcing rib (210) of at least one reinforcing rib group (200).

8. A drive train arrangement for a wind turbine generator according to any of claims 2-6, characterized in that The second reinforcing rib (300) can be provided with a plurality of second reinforcing ribs (300) staggered in the middle part of the shaft body (100). ​ 9. The drive train of a wind turbine generator as set forth in claim 8, wherein, ​ 10. The drive train of a wind turbine generator as set forth in claim 8, wherein, ​

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