Wind turbine generator hub main shaft connecting structure and wind turbine generator

Abstract

The utility model provides a hub spindle connecting structure of a wind generating set and the wind generating set, and relates to the technical field of wind power generation. The hub and spindle connecting structure of the wind turbine generator comprises a hub, a transition connecting shaft, a spindle and a wheel disk, the hub comprises a shell and a center cavity defined by the shell, the first end, in the axial direction, of the transition connecting shaft penetrates into the center cavity, and the second end, in the axial direction, of the transition connecting shaft is integrally connected with one end of the spindle; the shell and the transition connecting shaft are integrally formed and connected; the radial plate is located in the center cavity, the first end of the radial plate is connected to the first end of the transition connecting shaft, and the second end of the radial plate is connected to the inner wall of the shell. The utility model provides a hub spindle connecting structure of a wind generating set and the wind generating set, which can reduce the cost and improve the overall rigidity.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a wind turbine hub main shaft connection structure and a wind turbine generator set. Background Technology

[0002] In the field of wind power generation, the hub of a wind turbine is a key component, playing an important role in connecting the blades and transmitting power. The hub and main shaft of traditional wind turbines are mostly separate, resulting in a complex transmission system and numerous connection links. This not only increases manufacturing costs, but also makes the hub and main shaft with such complex connection structure prone to structural damage due to insufficient overall rigidity when bearing wind loads. Utility Model Content

[0003] To address at least one of the problems mentioned in the background art, this utility model provides a wind turbine hub main shaft connection structure and a wind turbine generator set, which can reduce costs and improve overall rigidity.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] In a first aspect, this utility model provides a wind turbine hub main shaft connection structure, including a hub, a transition connecting shaft, a main shaft and spokes. The hub includes a shell and a central cavity enclosed by the shell. The first end of the transition connecting shaft along the axial direction passes into the central cavity. The second end of the transition connecting shaft along the axial direction is integrally formed and connected to one end of the main shaft. The shell and the transition connecting shaft are integrally formed and connected.

[0006] The spokes are located in the central cavity. The first end of the spokes is connected to the first end of the transition connecting shaft, and the second end of the spokes is connected to the inner wall of the outer shell.

[0007] As an optional implementation, the second end of the transition connecting shaft is a frustum-shaped or stepped cylindrical structure, and the outer diameter of the second end of the transition connecting shaft decreases from the hub towards the main shaft.

[0008] As an alternative implementation, the spindle has a stepped shaft structure, and the outer diameter of the spindle decreases in a stepped manner along the direction from the hub to the spindle.

[0009] As an optional implementation, it also includes a bearing. The spindle includes a first shaft segment and a second shaft segment along the axial direction. The first shaft segment and the transition connecting shaft are integrally formed. The outer diameter of the first shaft segment is larger than the outer diameter of the second shaft segment to form a step at the junction of the first shaft segment and the second shaft segment. The bearing is mounted on the second shaft segment, and the inner ring of the bearing abuts against the step along the axial direction.

[0010] As an alternative implementation, the outer wall of the second end of the transition connecting shaft has a plurality of reinforcing ribs spaced apart in the circumferential direction, the reinforcing ribs extending along the axial direction of the transition connecting shaft.

[0011] As an alternative implementation, the outer casing has multiple connection ports for connecting to the blades of the wind turbine, and the second end of the spoke is connected to the connection port.

[0012] As an optional implementation, there are multiple spokes, with the first ends of the multiple spokes evenly distributed circumferentially along the transition connecting shaft, and the second ends of the multiple spokes connected to the connecting ports one by one.

[0013] As an optional implementation, it also includes a flange, which is connected to the connection port, and a blade is connected to the flange.

[0014] As an alternative implementation, the transition connecting shaft has an axially extending inner cavity that extends to a first end of the transition connecting shaft.

[0015] Secondly, this utility model also provides a wind turbine generator set, including the wind turbine generator set hub main shaft connection structure in the first aspect.

[0016] The wind turbine hub main shaft connection structure provided by this utility model includes a hub, a transition connecting shaft, a main shaft, and spokes. The hub includes a shell and a central cavity enclosed by the shell. The first end of the transition connecting shaft along the axial direction passes into the central cavity, and the second end of the transition connecting shaft along the axial direction is integrally formed and connected to one end of the main shaft. The shell and the transition connecting shaft are integrally formed and connected. The spokes are located in the central cavity, the first end of the spokes is connected to the first end of the transition connecting shaft, and the second end of the spokes is connected to the inner wall of the shell.

[0017] The wind turbine hub-main shaft connection structure provided by this utility model integrates the wind turbine hub and main shaft into a single structure, eliminating numerous connecting components and processes found in traditional split designs. This reduces connection points, significantly shortening the manufacturing process and lowering the costs of component procurement, processing, and assembly. Furthermore, it fundamentally reduces the risk of malfunctions caused by loose connections or wear. Specifically, the hub consists of a central cavity formed by two outer shells. A transition connecting shaft runs axially, with its first end penetrating the central cavity and its second end seamlessly integrated with one end of the main shaft. Simultaneously, the outer shell and the transition connecting shaft are also integrally formed. This greatly simplifies the complex transmission system and numerous connecting points of traditional split structures, significantly reducing manufacturing costs. In addition, the spokes located in the central cavity are connected at one end to the first end of the transition connecting shaft and at the second end to the inner wall of the outer shell. This design allows the overall structure to work together with the integrated hub, transition connecting shaft and main shaft to exert force when bearing wind loads, thanks to the connection and reinforcement effect of the spokes. This effectively makes up for the shortcomings of traditional structures that are prone to structural damage due to insufficient overall rigidity, and comprehensively improves the stability and reliability of wind turbine operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the hub shaft connection structure of the wind turbine provided in this embodiment of the present utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100 - Wind turbine hub main shaft connection structure;

[0022] 110 - Wheel hub;

[0023] 111 - Outer shell;

[0024] 1111 - Connection port;

[0025] 112 - Central cavity;

[0026] 120 - Transition connecting shaft;

[0027] 121-Reinforcing rib;

[0028] 122-Inner cavity;

[0029] 130 - Spindle;

[0030] 131 - First axle segment;

[0031] 132 - Second axle segment;

[0032] 140-spoke;

[0033] 150-Bearing;

[0034] 200-blade. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] In this application, the terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0037] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0038] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0039] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0040] Traditional wind turbines typically have separate hubs and main shafts, resulting in complex transmission systems and numerous connection points. This not only increases manufacturing costs, but also makes the hubs and main shafts, with their complex connection structures, prone to structural damage due to insufficient overall rigidity when bearing wind loads.

[0041] In view of this, the present invention provides a wind turbine hub main shaft connection structure, including a hub, a transition connecting shaft, a main shaft, and spokes. The hub includes a shell and a central cavity enclosed by the shell. The first end of the transition connecting shaft along the axial direction enters the central cavity, and the second end of the transition connecting shaft along the axial direction is integrally formed and connected to one end of the main shaft. The shell and the transition connecting shaft are also integrally formed and connected. The spokes are located in the central cavity, with the first end of the spokes connected to the first end of the transition connecting shaft, and the second end of the spokes connected to the inner wall of the shell. The hub is composed of the shell and the central cavity enclosed by the shell. The transition connecting shaft, along the axial direction, has its first end entering the central cavity, and its second end seamlessly integrally formed and connected to one end of the main shaft. Simultaneously, the shell and the transition connecting shaft are also integrally formed. This greatly simplifies the complex transmission system and numerous connection links of the traditional split structure, significantly reducing manufacturing costs. In addition, the spokes located in the central cavity are connected at one end to the first end of the transition connecting shaft and at the second end to the inner wall of the outer shell. This design allows the overall structure to work together with the integrated hub, transition connecting shaft and main shaft to exert force when bearing wind loads, thanks to the connection and reinforcement effect of the spokes. This effectively makes up for the shortcomings of traditional structures that are prone to structural damage due to insufficient overall rigidity, and comprehensively improves the stability and reliability of wind turbine operation.

[0042] Figure 1 This is a schematic diagram of the wind turbine hub main shaft connection structure 100 provided in an embodiment of this utility model. (See reference...) Figure 1 This utility model provides a wind turbine hub main shaft connection structure 100, including a hub 110, a transition connecting shaft 120, a main shaft 130, and spokes 140. The hub 110 includes a shell 111 and a central cavity 112 formed by the shell 111. The first end of the transition connecting shaft 120 along the axial direction passes through the central cavity 112, and the second end of the transition connecting shaft 120 along the axial direction is integrally formed and connected to one end of the main shaft 130. The shell 111 and the transition connecting shaft 120 are integrally formed and connected. The spokes 140 are located in the central cavity 112. The first end of the spokes 140 is connected to the first end of the transition connecting shaft 120, and the second end of the spokes 140 is connected to the inner wall of the shell 111.

[0043] The wind turbine hub main shaft connection structure 100 provided in this embodiment of the utility model integrates the wind turbine hub 110 and the main shaft 130 into a single structure, eliminating many connecting components and processes in the traditional split design. This reduces connection links, significantly shortens the manufacturing process, and lowers the costs of component procurement, processing, and assembly. Furthermore, it reduces the risk of malfunctions caused by loose connections or wear. Specifically, the hub 110 consists of a shell 111 and a central cavity 112 formed by the shell 111. A transition connecting shaft 120 extends axially, with its first end penetrating the central cavity 112 and its second end seamlessly integrated with one end of the main shaft 130. Simultaneously, the shell 111 is also integrally formed with the transition connecting shaft 120. This greatly simplifies the complex transmission system and numerous connection links of the traditional split structure, significantly reducing manufacturing costs and improving overall rigidity. In addition, the spokes 140 located in the central cavity 112 have their first end connected to the first end of the transition connecting shaft 120 and their second end tightly connected to the inner wall of the outer shell 111. This design allows the overall structure to work together with the integrated hub 110, transition connecting shaft 120 and main shaft 130 to further improve the overall rigidity when bearing wind loads, thanks to the connection and reinforcement effect of the spokes 140. This avoids structural damage due to insufficient overall rigidity and comprehensively improves the stability and reliability of the wind turbine operation.

[0044] In the above embodiments, the second end of the transition connecting shaft 120 can be a frustum-shaped or stepped cylindrical structure, and the outer diameter of the second end of the transition connecting shaft 120 decreases from the hub 110 towards the main shaft 130. When the wind turbine is running, the blades 200 capture wind energy and convert it into rotational power, which is then transmitted to the transition connecting shaft 120 via the hub 110. The frustum-shaped or stepped cylindrical design with a gradually decreasing outer diameter allows the force to converge and be transmitted more smoothly along the structure to the main shaft 130, avoiding stress concentration and ensuring efficient and stable power transmission. In addition, this structural design facilitates the integral molding of the transition connecting shaft 120 and the main shaft 130 during the manufacturing process, ensuring the quality and strength of the connection, reducing potential weak points, thereby improving the reliability of key components of the entire wind turbine and the overall performance of the unit, and extending its service life.

[0045] In the above embodiments, the main shaft 130 can be a stepped shaft structure, and the outer diameter of the main shaft 130 decreases in a stepped manner along the direction from the hub 110 to the main shaft 130. This allows for a reasonable distribution of load-bearing capacity across different parts of the main shaft 130 based on their location and stress requirements. The portion near the hub 110 that bears a larger load has a larger outer diameter, ensuring structural strength and enabling it to reliably withstand the strong torque and bending moment transmitted from the hub 110. Towards the end, the load decreases relatively, and the outer diameter decreases accordingly in a stepped manner, avoiding material redundancy and waste. This optimized structural form achieves a balanced distribution of force, ensuring the entire transmission chain remains stable and reliable under high-intensity operation. Furthermore, the stepped shaft structure provides a clear process route for manufacturing. In machining processes such as turning and grinding, efficient and precise operations can be performed according to the dimensional requirements of different stepped sections, reducing processing difficulty and cost. In the subsequent operation and maintenance phase, if a certain section experiences wear, fatigue damage or other issues, the distinct stepped boundaries make fault diagnosis and location faster. Maintenance personnel can easily carry out repair or component replacement operations on specific sections, greatly reducing downtime for maintenance, improving the availability of wind turbine units, and comprehensively ensuring the long-term stable and efficient operation of wind turbine units.

[0046] In the above embodiments, a bearing 150 may also be included. The main shaft 130 includes a first shaft segment 131 and a second shaft segment 132 along the axial direction. The first shaft segment 131 and the transition connecting shaft 120 are integrally formed. The outer diameter of the first shaft segment 131 is larger than the outer diameter of the second shaft segment 132, so as to form a step at the junction of the first shaft segment 131 and the second shaft segment 132. The bearing 150 is installed on the second shaft segment 132, and the inner ring of the bearing 150 abuts against the step along the axial direction. The bearing 150 is installed on the second shaft segment 132, and its inner ring abuts against the step along the axial direction. This design makes the installation position of the bearing 150 more stable and reliable. When the wind turbine is running, the complex load transmitted by the hub 110 and blades 200 is transferred to the bearing 150 on the second shaft section 132 through the transition connecting shaft 120 and the first shaft section 131. The step effectively restricts the axial displacement of the inner ring of the bearing 150, preventing the bearing 150 from moving under high load, ensuring that the bearing 150 stably performs its supporting and rotating functions, thereby enabling the main shaft 130 to rotate smoothly and ensuring the smooth power transmission of the entire wind turbine. At the same time, the bearing 150 supports the main shaft 130, ensuring more stable transmission of the main shaft 130.

[0047] In the above embodiment, the outer wall of the second end of the transition connecting shaft 120 may have multiple reinforcing ribs 121 spaced apart circumferentially, with the reinforcing ribs 121 extending axially along the transition connecting shaft 120. It is understood that wind turbines bear enormous wind loads and various complex alternating stresses during operation. The presence of the reinforcing ribs 121 significantly enhances the structural strength and rigidity of the transition connecting shaft 120, effectively resisting deformation and bending caused by wind, reducing the possibility of fatigue cracks and damage to the shaft, thereby improving the reliability and service life of the entire wind turbine. Simultaneously, the reinforcing ribs 121 also help to more evenly transmit the force borne by the hub 110 to the main shaft 130. When wind force is transmitted from the blades 200 to the hub 110, and then from the hub 110 to the transition connecting shaft 120, the reinforcing ribs 121 can guide the force transmission path, avoiding stress concentration and allowing the force to be transmitted more smoothly along the transition connecting shaft 120 to the main shaft 130, ensuring efficient and stable power transmission. Furthermore, the design of the reinforcing rib 121 can improve the manufacturability of the transition connecting shaft 120 to some extent. During casting or forging, the reinforcing rib 121 can serve as a process rib, helping to improve metal flow, reduce casting defects, and improve forming quality.

[0048] In the above embodiment, the outer casing 111 may have multiple connection ports 1111 that connect to the blades 200 of the wind turbine, and the second end of the spoke 140 is connected to the connection port 1111. It is understood that the blade 200, as a key component of the wind turbine for capturing wind energy, generates strong torque and impact force during operation, which is transmitted to the outer casing 111 through the connection port 1111. The connection of the second end of the spoke 140 to the connection port 1111 can disperse the force transmitted from the blade 200 throughout the entire structure of the hub 110. This connection method can enhance the structural strength of the connection between the hub 110 and the blade 200, effectively avoiding problems such as deformation and cracking of the connection port 1111 due to excessive local stress, and ensuring the stability and reliability of the wind turbine under high-load operation.

[0049] When the blade 200 rotates under wind power, force can be transmitted from the blade 200 through the connector 1111 to the outer casing 111, and then further transmitted through the spokes 140 to the transition connecting shaft 120 and the main shaft 130. This orderly force transmission process makes the power transmission of the entire wind turbine smoother and more efficient. The connection between the spokes 140 and the connector 1111 ensures accurate force transmission, reduces energy loss, and improves the power generation efficiency of the wind turbine. In addition, the design of the connector 1111 facilitates the installation and removal of the blade 200, making it easier for staff to replace and maintain the blade 200. At the same time, the connection method between the spokes 140 and the connector 1111 also facilitates the inspection of key parts during maintenance, allowing for the timely detection and repair of potential problems, reducing the maintenance cost and downtime of the wind turbine, and improving the economic benefits of the wind farm.

[0050] In the above embodiments, there may be multiple spokes 140. The first ends of the multiple spokes 140 are evenly distributed along the circumference of the transition connecting shaft 120, and the second ends of the multiple spokes 140 are connected to the connecting ports 1111 one by one. When the wind turbine is running, the blades 200 capture wind energy and convert it into mechanical force, which is transmitted to the connecting ports 1111 of the hub 110. The multiple spokes 140 can distribute these forces more evenly, avoid local stress concentration, further reduce the risk of fatigue damage and deformation of the structure, and ensure the long-term stable operation of the wind turbine.

[0051] In the above embodiments, a flange may also be included, connected to the connection port 1111, and the blade 200 is connected to the flange. The flange acts as a transition component, increasing the connection area and making the connection between the blade 200 and the hub 110 more robust, while also effectively distributing various loads transmitted from the blade 200. During wind turbine operation, the wind force on the blade 200 generates complex forces and moments. Through the connection and transmission of the flange, these forces can be more evenly distributed on the spoke 140 and hub 110 structures, reducing the stress on individual connection points, improving the fatigue resistance and stability of the entire structure, and effectively reducing the risk of failure due to loose or damaged connections. The wind energy captured by the blade 200 is converted into mechanical force and transmitted to the spoke 140, which then conducts it to the transition connection shaft 120 and the main shaft 130. This orderly force transmission process reduces energy loss and improves the energy conversion efficiency of the wind turbine. The spokes 140 guide the direction of force transmission, enabling the force to be transmitted more accurately along the designed path, avoiding chaotic force transmission and unnecessary energy loss, and helping to improve the power generation performance of the wind turbine. It should be noted that the flange can be mounted on the connection port 1111 via a bearing, and the blade 200 is fixedly connected to the flange, allowing the blade 200 to rotate around its own axis to adapt to different wind directions and improve power generation efficiency.

[0052] In the above embodiments, the transition connecting shaft 120 may have an axially extending inner cavity 122 extending to the first end of the transition connecting shaft 120. The design of the inner cavity 122 of the transition connecting shaft 120 can optimize the manufacturing process to a certain extent. Specifically, reserving the inner cavity 122 during casting or forging of the transition connecting shaft 120 can reduce material usage and lower manufacturing costs. Simultaneously, this design also facilitates subsequent processing and assembly. For example, when installing internal wiring, workers can directly operate through the inner cavity 122 without additional complex installation steps, improving production efficiency. Moreover, the presence of the inner cavity 122 reduces the weight of the transition connecting shaft 120, helping to reduce the inertia of the rotating parts of the wind turbine and improve the unit's response speed and operating efficiency.

[0053] Furthermore, this utility model embodiment also provides a wind turbine generator set, including the wind turbine generator set hub main shaft connection structure 100 in the above embodiment. The wind turbine generator set hub main shaft connection structure 100 includes a hub 110, a transition connecting shaft 120, a main shaft 130, and a spoke 140. The hub 110 includes a shell 111 and a central cavity 112 formed by the shell 111. The first end of the transition connecting shaft 120 along the axial direction passes through the central cavity 112, and the second end of the transition connecting shaft 120 along the axial direction is integrally formed and connected to one end of the main shaft 130. The shell 111 and the transition connecting shaft 120 are integrally formed and connected. The spoke 140 is located in the central cavity 112. The first end of the spoke 140 is connected to the first end of the transition connecting shaft 120, and the second end of the spoke 140 is connected to the inner wall of the shell 111. The hub 110 is composed of a central cavity 112 formed by a shell 111 and the shell 111. The transition connecting shaft 120 runs axially, with its first end inserted into the central cavity 112 and its second end seamlessly integrated with one end of the main shaft 130. Simultaneously, the shell 111 is also integrally formed with the transition connecting shaft 120. This significantly simplifies the complex transmission system and numerous connection links of traditional split structures, greatly reducing manufacturing costs. Furthermore, the spokes 140 located within the central cavity 112 have their first end connected to the first end of the transition connecting shaft 120 and their second end tightly connected to the inner wall of the shell 111. This design allows the overall structure to work synergistically with the integrated hub 110, transition connecting shaft 120, and main shaft 130 when bearing wind loads, thanks to the reinforcing effect of the spokes 140. This effectively compensates for the shortcomings of traditional structures, which are prone to structural damage due to insufficient overall rigidity, and comprehensively improves the stability and reliability of the wind turbine operation.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wind turbine generator hub main shaft connection structure, characterized by, The hub comprises a shell and a central cavity surrounded by the shell, the transition connecting shaft penetrates into the central cavity at a first end along an axial direction, a second end of the transition connecting shaft and an end of the main shaft are integrally connected, and the shell and the transition connecting shaft are integrally connected; The spoke is located in the central cavity, a first end of the spoke is connected to the first end of the transition connecting shaft, and a second end of the spoke is connected to an inner wall of the shell.

2. The wind turbine hub spindle connection structure according to claim 1, wherein, The second end of the transition connecting shaft is in a structure of a conical frustum or a stepped cylinder, and an outer diameter of the second end of the transition connecting shaft decreases from the hub to the main shaft.

3. The wind turbine main shaft connection structure of claim 2, wherein, The main shaft is in a stepped shaft structure, and an outer diameter of the main shaft decreases in a stepped manner from the hub to the main shaft.

4. The wind turbine hub-shaft connection of claim 3, wherein, The main shaft comprises a first shaft section and a second shaft section along an axial direction, the first shaft section and the transition connecting shaft are integrally connected, an outer diameter of the first shaft section is greater than an outer diameter of the second shaft section, a step is formed at a joint of the first shaft section and the second shaft section, a bearing is installed on the second shaft section, and an inner ring of the bearing abuts against the step along the axial direction.

5. The wind turbine main shaft connection structure of claim 4, wherein, An outer wall of the second end of the transition connecting shaft has a plurality of reinforcing ribs distributed in a circumferential direction, and the reinforcing ribs extend along an axial direction of the transition connecting shaft.

6. The wind turbine main shaft connection structure of claim 5, wherein, The shell has a plurality of connecting ports connected to blades of the wind turbine generator, and the second end of the spoke is connected to the connecting ports.

7. The wind turbine main shaft connection structure of claim 6, wherein, The spoke has a plurality of first ends uniformly distributed in a circumferential direction of the transition connecting shaft, and a plurality of second ends of the spoke are connected to the connecting ports one by one.

8. The wind turbine main shaft connection structure of claim 7, wherein, A flange is further included, the flange is connected to the connecting ports, and the blades are connected to the flange.

9. The wind turbine main shaft connection structure of claim 8, wherein, The transition connecting shaft has an inner cavity extending along an axial direction, and the inner cavity extends to the first end of the transition connecting shaft.

10. A wind power unit, characterized in that The wind turbine generator hub main shaft connecting structure is provided. The wind turbine generator hub main shaft connecting structure is provided.

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