Blade locking device based on a wind turbine

Abstract

The application provides a wind turbine blade locking device, which is arranged in a wind turbine and connected with a hub of a blade to lock the hub. The blade locking device comprises a locking mechanism and a connecting mechanism. The locking mechanism comprises a gear ring and a gear rack. The gear ring is fixedly connected with the hub. An inner ring of the gear ring is provided with an inner gear groove. The gear rack is engaged with the inner gear groove. The gear rack is connected with one end of the connecting mechanism. The other end of the connecting mechanism is used for fixedly connecting in the wind turbine. The gear ring and the gear rack are engaged to lock the hub. The locking mechanism and the wind turbine are fixed through the connecting mechanism. The locking structure is simple, the engaged locking mode is stable, the rotation of the hub can be effectively limited during the maintenance of the blade, safe working conditions are provided for the maintenance work, the overall device meets the internal installation requirements of the wind turbine, and the connection relationship is reasonable and can effectively transmit the locking force.

Description

Technical Field

[0001] This application belongs to the field of wind power generation technology, specifically relating to a blade locking device based on a wind turbine. Background Technology

[0002] Wind turbine blades are a crucial component of wind turbines. Their primary function is to capture wind energy and convert it into mechanical energy to drive the turbine's rotor, thereby generating electricity. Blades are typically made of lightweight, high-strength composite materials to improve durability and efficiency. The aerodynamic design of the blades ensures maximum wind energy utilization while minimizing drag and noise. Modern wind turbine blades often feature streamlined, curved surface structures to adapt to varying wind speeds and enhance power generation efficiency. However, during long-term operation, blade maintenance is necessary based on actual conditions; therefore, blade locking devices are essential for wind turbines. Summary of the Invention

[0003] Therefore, the technical problem to be solved by this application is to provide a blade locking device based on a wind turbine, which can lock the blades during maintenance.

[0004] To address the aforementioned issues, this application provides a blade locking device based on a wind turbine, which is installed within the wind turbine and connected to the hub of the blade to lock the hub. The blade locking device includes a locking mechanism and a connecting mechanism. The locking mechanism includes a gear ring and a rack. The gear ring is fixedly connected to the hub. The inner ring of the gear ring is provided with an inner tooth groove. The rack meshes with the inner tooth groove. The rack is connected to one end of the connecting mechanism, and the other end of the connecting mechanism is used for fixed connection within the wind turbine.

[0005] Optionally, the gear ring is coaxially arranged with the wheel hub, and the gear ring is fixedly connected to one side of the outer wall of the wheel hub.

[0006] Optionally, the locking mechanism further includes a connecting plate, one side of the rack meshes with the inner tooth groove, and the other side of the rack is fixedly connected to the connecting mechanism through the connecting plate.

[0007] Optionally, there are multiple racks and multiple connecting plates, and they are arranged in a one-to-one correspondence. The multiple racks and multiple connecting plates are evenly arranged along the circumference of the hub.

[0008] Optionally, the connecting mechanism includes a support frame, with a plurality of connecting plates fixedly connected to a first end of the support frame and arranged sequentially along the circumference of the first end, and a second end of the support frame fixedly connected inside the wind turbine.

[0009] Optionally, the support frame is L-shaped.

[0010] Optionally, the connecting mechanism includes a fixing plate, and the second end of the support frame is fixedly connected to the wall inside the wind turbine unit through the fixing plate.

[0011] Optionally, the hub has a first threaded hole, the connecting plate has a second threaded hole, and the blade locking device includes a first bolt, which is threaded into the first threaded hole and the second threaded hole respectively, so as to fix the connecting plate on the hub.

[0012] Optionally, each of the connecting plates has at least two second threaded holes, and the at least two second threaded holes are arranged along the length direction of the connecting plate.

[0013] Optionally, the fixing plate is provided with a third threaded hole, and the blade locking device includes a second bolt, which is threadedly connected to the third threaded hole. The fixing plate is connected to the wall inside the wind turbine through the second bolt and the third threaded hole.

[0014] The blade locking device based on a wind turbine provided in the embodiments of this application locks the hub by engaging the gear ring and the rack. The locking mechanism is fixed to the wind turbine by a connecting mechanism. The locking structure is simple and the engagement locking method is highly stable. It can effectively restrict the rotation of the hub during blade maintenance, providing safe working conditions for maintenance work. The overall device is adapted to the internal installation requirements of the wind turbine, and the reasonable connection relationship can effectively transmit the locking force. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the blade locking device based on a wind turbine according to an embodiment of this application; Figure 2 This is a schematic diagram of the main structure of the blade locking device based on a wind turbine according to an embodiment of this application; Figure 3 This is an exploded structural diagram of a blade locking device based on a wind turbine according to an embodiment of this application; Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0016] The reference numerals in the attached figures are as follows: 1. Hub; 2. Blade locking device; 201. Gear ring; 202. First threaded hole; 203. Rack; 204. Connecting plate; 205. Second threaded hole; 206. Support frame; 207. First bolt; 208. Fixing plate; 209. Third threaded hole; 210. Second bolt. Detailed Implementation

[0017] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0021] See also Figures 1 to 4 As shown, according to an embodiment of this application, a blade locking device based on a wind turbine is provided, which is installed inside the wind turbine and connected to the hub 1 of the blade to lock the hub 1. The blade locking device 2 includes a locking mechanism and a connecting mechanism. The locking mechanism includes a gear ring 201 and a rack 203. The gear ring 201 is fixedly connected to the hub 1. The inner ring of the gear ring 201 is provided with an inner tooth groove. The rack 203 meshes with the inner tooth groove. The rack 203 is connected to one end of the connecting mechanism. The other end of the connecting mechanism is used to be fixedly connected inside the wind turbine.

[0022] By engaging the gear ring 201 with the rack 203, the hub 1 is locked. The locking mechanism is fixed to the wind turbine through the connecting mechanism. The locking structure is simple and the engagement locking method is highly stable. It can effectively restrict the rotation of the hub 1 during blade maintenance, providing safe working conditions for maintenance work. The overall device is adapted to the internal installation requirements of the wind turbine, and the reasonable connection relationship can effectively transmit the locking force.

[0023] The blade locking device 2 is applied inside the wind turbine unit. The entire blade locking device 2 is connected to the hub 1 of the blade to lock the hub 1. The locking mechanism includes a gear ring 201 and a rack 203. The gear ring 201 is fixedly connected to the hub 1. The inner ring of the gear ring 201 has internal tooth grooves. The rack 203 meshes with the internal tooth grooves of the gear ring 201. The rack 203 is also connected to one end of a connecting mechanism, the other end of which is fixedly connected to the inside of the wind turbine unit. The fixed relationship between the gear ring 201 and the hub 1 allows the gear ring 201 to move synchronously with the hub 1. The meshing of the rack 203 with the internal tooth grooves restricts the rotation of the gear ring 201, thereby restricting the rotation of the hub 1. The connecting mechanism fixes the rack 203 inside the wind turbine unit, providing a reverse supporting force to the rack 203, ensuring the meshing and locking effect, and achieving effective locking of the hub 1.

[0024] The gear ring 201 is coaxially arranged with the hub 1 and is fixedly connected to one side of the outer wall of the hub 1.

[0025] By setting the gear ring 201 coaxially with the hub 1 and fixing it to the outer wall of one side of the hub 1, the rotation synchronization between the gear ring 201 and the hub 1 can be guaranteed, avoiding misalignment of the rack 203 and the inner tooth groove due to installation eccentricity, making the meshing and locking force more uniform. At the same time, this installation method does not occupy the internal space of the hub 1, adapts to the layout characteristics of the wind turbine, and facilitates the fixed installation operation of the gear ring 201 and the hub 1.

[0026] The hub 1 is roughly disc-shaped and vertically positioned. The gear ring 201 is fixedly connected to one side of the outer wall of the hub 1 in the horizontal direction, and the gear ring 201 is also vertically positioned.

[0027] The locking mechanism also includes a connecting plate 204. One side of the rack 203 meshes with the inner tooth groove, and the other side of the rack 203 is fixedly connected to the connecting mechanism through the connecting plate 204.

[0028] By setting the connecting plate 204, a stable connection between the rack 203 and the connecting mechanism is achieved, so that the force on the rack 203 can be transmitted to the connecting mechanism through the connecting plate 204. The connecting plate 204 can support and limit the rack 203, prevent the rack 203 from deviating during meshing, ensure the tightness of the meshing between the rack 203 and the inner tooth groove, and improve the overall stability of the locking mechanism.

[0029] In this design, one side of the rack 203 is engaged with the inner tooth groove of the gear ring 201, while the other side of the rack 203 is fixedly connected to the connecting plate 204. The side of the connecting plate 204 furthest from the rack 203 is then fixedly connected to the connecting mechanism. The connecting plate 204, acting as an intermediate connector between the rack 203 and the connecting mechanism, transmits the locking reaction force from the rack 203 to the connecting mechanism. Simultaneously, the connecting plate 204 provides radial and axial limiting for the rack 203, preventing it from shifting during engagement and ensuring that the rack 203 remains tightly engaged with the inner tooth groove. This prevents locking failure due to rack 203 misalignment and improves the structural stability of the locking mechanism.

[0030] There are multiple racks 203 and multiple connecting plates 204, and they are arranged in a one-to-one correspondence. The multiple racks 203 and multiple connecting plates 204 are evenly arranged along the circumference of the hub 1.

[0031] By arranging multiple racks 203 and connecting plates 204 evenly along the circumference of the hub 1, the hub 1 is subjected to a uniform locking force in the circumferential direction, avoiding excessive local force that could cause deformation of the hub 1 or locking components. The simultaneous action of multiple meshing structures can improve the overall locking strength. Even if a single rack 203 experiences slight wear, it will not affect the overall locking effect, greatly improving the reliability and durability of the blade locking device 2.

[0032] The device comprises multiple racks 203 and connecting plates 204, with each rack 203 and connecting plate 204 forming a one-to-one connection. All racks 203 and connecting plates 204 are evenly arranged along the circumferential direction of the hub 1. These multiple sets of racks 203 and connecting plates 204, evenly arranged along the circumference of the hub 1, simultaneously engage and lock at multiple circumferential points, ensuring a uniform distribution of the locking force on the hub 1 in the circumferential direction. This prevents localized deformation of the hub 1. The multiple engaging structures simultaneously bear the locking reaction force, significantly improving the overall locking strength. Even if individual racks 203 experience minor malfunctions, the remaining racks 203 can still lock, ensuring the device's fault tolerance.

[0033] The connection mechanism includes a support frame 206, and multiple connecting plates 204 are fixedly connected to the first end of the support frame 206 and arranged sequentially along the circumference of the first end. The second end of the support frame 206 is fixedly connected to the wind turbine unit.

[0034] By setting up the support frame 206, multiple connecting plates 204 are centrally fixed, so that the force of each connecting plate 204 can be gathered and transmitted to the support frame 206, and then transmitted to the wind turbine by the support frame 206. The force transmission path is stable, and the connecting plates 204 arranged circumferentially along the first end of the support frame 206 can be adapted to the circumferential structure of the hub 1, ensuring that the force at each locking point is balanced and further improving the locking stability of the device.

[0035] The connecting mechanism includes a support frame 206. All connecting plates 204 are fixedly connected to the first end of the support frame 206, and multiple connecting plates 204 are arranged sequentially along the circumferential direction of the first end of the support frame 206. The second end of the support frame 206 is directly fixedly connected to the interior of the wind turbine. The support frame 206, as a centralized fixing carrier for multiple connecting plates 204, gathers the locking reaction forces transmitted by each connecting plate 204 and uniformly transmits them to the interior of the wind turbine, avoiding the problem of force dispersion caused by the individual forces on multiple connecting plates 204. The connecting plates 204 arranged circumferentially along the first end of the support frame 206 can match the circumferential structure of the hub 1, ensuring that the force at each meshing point can be evenly transmitted to the support frame 206, improving the stability of force transmission, and achieving stable locking of the hub 1.

[0036] The support frame 206 is L-shaped.

[0037] Among them, the L-shaped support frame 206 can change the direction of force transmission, so that the first end of the support frame 206 can fit the circumferential position of the hub 1 and connect with the connecting plate 204, and the second end can be adapted to the wall or other fixed structure inside the wind turbine for fixation, adapting to the complex spatial layout inside the wind turbine.

[0038] Both sections of the L-shaped structure formed by the support frame 206 can be telescopic rods, thereby improving the applicability of the support frame 206 and facilitating the connection of the support frame 206.

[0039] The connection mechanism includes a fixing plate 208, and the second end of the support frame 206 is fixedly connected to the wall inside the wind turbine through the fixing plate 208.

[0040] By setting the fixing plate 208, the contact area between the support frame 206 and the inner wall of the wind turbine is increased, so that the force of the support frame 206 can be evenly distributed to the wall of the wind turbine, avoiding damage to the wall of the wind turbine due to excessive local contact pressure. At the same time, the fixing plate 208 provides a stable fixing foundation for the support frame 206, preventing the support frame 206 from loosening or shifting when under force, and further strengthening the stability of the connection between the connecting mechanism and the wind turbine.

[0041] The second end of the support frame 206 is fixedly connected to the fixing plate 208, which in turn is fixedly connected to the wall inside the wind turbine. The fixing plate 208 increases the contact area between the support frame 206 and the wind turbine wall, distributing the force transmitted by the support frame 206 evenly to the wind turbine wall, preventing excessive local contact pressure from damaging the wall. At the same time, the fixing plate 208 provides a more stable foundation for the support frame 206, restricting the rotation or displacement of the second end of the support frame 206, so that the support frame 206 can continuously provide stable support force for the connecting plate 204 and the rack 203, ensuring that the meshing and locking effect remains unchanged.

[0042] The hub 1 has a first threaded hole 202, the connecting plate 204 has a second threaded hole 205, and the blade locking device 2 includes a first bolt 207. The first bolt 207 is threaded into the first threaded hole 202 and the second threaded hole 205 respectively to fix the connecting plate 204 on the hub 1.

[0043] By setting the first bolt 207, the first threaded hole 202 and the second threaded hole 205, the connecting plate 204 and the hub 1 are detachably fixedly connected. The threaded connection can effectively limit the relative movement between the connecting plate 204 and the hub 1, so that the meshing position of the rack 203 and the inner tooth groove is kept fixed. At the same time, the detachable connection method facilitates the installation, disassembly and subsequent maintenance and replacement of the device, and is suitable for the maintenance needs of wind turbine units.

[0044] The hub 1 has a first threaded hole 202, and the connecting plate 204 has a second threaded hole 205. A first bolt 207 is threadedly connected to both the first threaded hole 202 and the second threaded hole 205, thus fixing the connecting plate 204 to the hub 1. The threaded structure of the first bolt 207 cooperates with the threaded structures of the first threaded hole 202 and the second threaded hole 205, utilizing the self-locking property of the threaded connection to fix the connecting plate 204 to the hub 1, restricting the relative movement between the connecting plate 204 and the hub 1. This keeps the rack 203, which is fixed to the connecting plate 204, in a fixed position, ensuring that the rack 203 and the internal tooth groove are always in a tight meshing state. At the same time, the threaded connection provides sufficient connection strength to withstand the reaction force generated when the rack 203 is engaged, preventing the connecting plate 204 from separating from the hub 1 and causing locking failure.

[0045] Each connecting plate 204 has at least two second threaded holes 205, and the at least two second threaded holes 205 are arranged along the length of the connecting plate 204.

[0046] By arranging at least two second threaded holes 205 along the length direction on each connecting plate 204, multiple first bolts 207 can be used to achieve multi-point fixation between the connecting plate 204 and the hub 1, making the force on the connecting plate 204 more uniform and avoiding the stress concentration problem that occurs with single-point fixation. At the same time, the arrangement along the length direction can adapt to the force characteristics of different positions of the connecting plate 204, further limiting the warping and offset of the connecting plate 204 and ensuring the tightness of the connection between the connecting plate 204 and the hub 1.

[0047] Each connecting plate 204 has at least two second threaded holes 205 machined on it, and these at least two second threaded holes 205 are arranged along the length of the connecting plate 204. The at least two second threaded holes 205 arranged along the length of the connecting plate 204 can cooperate with multiple first bolts 207 to achieve multi-point fixation between the connecting plate 204 and the hub 1, so that all positions of the connecting plate 204 can be tightly connected to the hub 1, avoiding warping or displacement of the connecting plate 204 due to single-point fixation, making the force on the connecting plate 204 more uniform and reducing stress concentration. At the same time, multi-point fixation can further restrict the relative movement between the connecting plate 204 and the hub 1, keeping the meshing clearance between the rack 203 and the internal tooth groove constant, and improving the stability of locking.

[0048] The fixing plate 208 has a third threaded hole 209. The blade locking device 2 includes a second bolt 210, which is threadedly connected to the third threaded hole 209. The fixing plate 208 is connected to the wall inside the wind turbine through the second bolt 210 and the third threaded hole 209.

[0049] By engaging the second bolt 210 with the third threaded hole 209 of the fixing plate 208, a detachable threaded connection between the fixing plate 208 and the wind turbine wall is achieved, providing sufficient connection strength to prevent the fixing plate 208 from sliding relative to the wind turbine wall when under stress, ensuring the overall fixing effect of the connection mechanism. At the same time, the detachable design makes it easy to adjust the installation position of the fixing plate 208 according to the actual situation inside the wind turbine, improving the installation adaptability of the device.

[0050] The fixing plate 208 has a third threaded hole 209 machined on it. The second bolt 210 is threadedly connected to the third threaded hole 209, and the fixing plate 208 is fixed to the wall inside the wind turbine through the connection of the second bolt 210. The thread structure of the second bolt 210 and the thread structure of the third threaded hole 209 cooperate with each other to realize the detachable fixing of the fixing plate 208 to the wall of the wind turbine. The threaded connection can prevent the fixing plate 208 from sliding or separating relative to the wall of the wind turbine when subjected to the force transmitted by the support frame 206. This allows the fixing plate 208 to provide a continuous and stable fixing foundation for the support frame 206, ensuring the overall fixing effect of the connection mechanism, and thus enabling the locking mechanism to always maintain effective locking of the hub 1.

[0051] Example This embodiment provides a blade locking device based on a wind turbine. The blade locking device 2 is installed inside the wind turbine and connected to the hub 1 of the blade to lock the hub 1. The blade locking device 2 includes a locking mechanism and a connecting mechanism. The locking mechanism includes a gear ring 201 and a rack 203. The gear ring 201 is fixedly connected to the hub 1. The inner ring of the gear ring 201 is provided with an inner tooth groove. The rack 203 meshes with the inner tooth groove. The rack 203 is connected to one end of the connecting mechanism, and the other end of the connecting mechanism is used for fixed connection inside the wind turbine.

[0052] The gear ring 201 and the hub 1 can be fixedly connected by bolts or other methods. A first threaded hole 202 is provided on one side of the hub 1, and the internal tooth groove meshes with the rack 203. A connecting plate 204 is fixedly connected to one side of the rack 203. A second threaded hole 205 is provided along the thickness direction of the connecting plate 204. A support frame 206 is fixedly connected to the side of the connecting plate 204 away from the rack 203. A first bolt 207 is threaded into the second threaded hole 205. A fixing plate 208 is connected to the other side of the support frame 206. A third threaded hole 209 is provided on one side of the fixing plate 208. A second bolt 210 is threaded into the third threaded hole 209.

[0053] When maintenance is required, the rack 203 is first engaged with the inner tooth groove, and the connecting plate 204 is fitted into the first threaded hole 202 of the hub 1 through the first bolt 207, thus achieving initial engagement and fixation. This allows the rack 203 and the connecting plate 204 to be reliably fixed on the hub 1, thus completing the initial locking. At the same time, the fixing plate 208 is placed inside the wind turbine and threadedly connected and fixed to the wind turbine through the second bolt 210. At this time, the combined action of the connecting plate 204, the support frame 206 and the fixing plate 208 improves the stability and strength of the overall structure when locking, ensuring the safety of maintenance personnel during maintenance.

[0054] Furthermore, six first threaded holes 202 and six second threaded holes 205 are provided. The positions of the first threaded holes 202 and the second threaded holes 205 are aligned one to one. The first threaded hole 202 is located on one side of the hub 1 and corresponds to the second threaded hole 205. They are connected by first bolts 207, so that the connecting plate 204 and the rack 203 can be firmly fixed on the hub 1, preventing loosening or falling off during use. At the same time, the fixing by multiple first bolts 207 allows the connecting plate 204 and the rack 203 to be evenly stressed, effectively improving the stability and impact resistance of the entire mechanism, making it suitable for high-intensity environments.

[0055] Furthermore, two second threaded holes 205 are provided on the connecting plate 204 and distributed along the length of the connecting plate 204. The second threaded holes 205 penetrate the connecting plate 204 and are aligned with the first threaded holes 202 on the hub 1. They are connected and fixed by the first bolt 207, so that the connecting plate 204 is tightly connected to the hub 1, thereby firmly installing the rack 203 on the hub 1, ensuring the overall stability of the blade locking device 2, and thus improving the rigidity and durability of the entire mechanism.

[0056] Furthermore, three connecting plates 204 are provided, which are evenly distributed circumferentially on the hub 1. One side of the connecting plate 204 is fixedly connected to the rack 203, and the other side is connected to the fixing plate 208 through the support frame 206. The second threaded hole 205 on the connecting plate 204 is aligned with the first threaded hole 202 on the hub 1, and fixed by the first bolt 207, so that the rack 203 can be stably installed on the hub 1, thereby avoiding deformation or damage caused by local stress concentration and improving the durability of the blade locking device 2.

[0057] Furthermore, one side of the first bolt 207 is threaded into the first threaded hole 202, and the rack 203 and the connecting plate 204 are fixed to the hub 1 by the first bolt 207.

[0058] Furthermore, four third threaded holes 209 are provided on the fixing plate 208. The four third threaded holes 209 are symmetrically and equally spaced on the fixing plate 208. The third threaded holes 209 are used to provide the foundation for the threaded connection of the fixing plate 208, which enhances the overall structural stability and improves the convenience of installation and maintenance. The equally spaced arrangement ensures balanced force, so that the other side of the blade locking device 2 can be firmly connected to the wind turbine, thereby ensuring the locking capability.

[0059] Furthermore, the support frame 206 is L-shaped and can be configured in multiple models with different sizes. The support frame 206 ensures the stability of the blades during locking, enhances structural rigidity, improves stress balance, and provides flexible installation adaptability. The L-shaped design not only optimizes overall stability but also improves the durability of the mechanism, enabling it to maintain reliable performance under high-intensity operating conditions.

[0060] Furthermore, there are also three racks 203, which are aligned with the three connecting plates 204 one by one. The main function of the racks 203 is to achieve precise meshing with the inner tooth groove, ensure stable engagement of the hub 1, improve the balance of force, enhance impact resistance, and improve the durability and reliability of the entire mechanism. At the same time, its equidistant distribution design makes the overall structure more stable and suitable for high-intensity, long-term working scenarios.

[0061] Furthermore, four second bolts 210 are provided. The fixing plate 208 is fixed to the wind turbine through the second bolts 210. The four second bolts 210 are respectively aligned with the third threaded holes 209, thereby ensuring that the device can be stably connected to the wind turbine, thereby improving the locking ability of the device, avoiding the situation where the blades rotate due to the loosening of a single bolt, and improving the overall safety.

[0062] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0063] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely implementation methods of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A blade locking device based on a wind turbine generator, characterized in that, Used to be installed inside the wind turbine and connected to the hub (1) of the blade to lock the hub (1); the blade locking device (2) includes a locking mechanism and a connecting mechanism. The locking mechanism includes a gear ring (201) and a rack (203). The gear ring (201) is fixedly connected to the hub (1). The inner ring of the gear ring (201) is provided with an inner tooth groove. The rack (203) meshes with the inner tooth groove. The rack (203) is connected to one end of the connecting mechanism. The other end of the connecting mechanism is used to be fixedly connected inside the wind turbine.

2. The blade locking device based on a wind turbine generator according to claim 1, characterized in that, The gear ring (201) is coaxially arranged with the hub (1), and the gear ring (201) is fixedly connected to one side of the outer wall of the hub (1).

3. The blade locking device based on a wind turbine generator according to claim 1, characterized in that, The locking mechanism further includes a connecting plate (204), one side of the rack (203) meshes with the inner tooth groove, and the other side of the rack (203) is fixedly connected to the connecting mechanism through the connecting plate (204).

4. The blade locking device based on a wind turbine generator according to claim 3, characterized in that, The number of racks (203) and connecting plates (204) are both multiple and are arranged in a one-to-one correspondence. The multiple racks (203) and multiple connecting plates (204) are evenly arranged along the circumference of the hub (1).

5. The blade locking device based on a wind turbine generator according to claim 4, characterized in that, The connecting mechanism includes a support frame (206), and a plurality of connecting plates (204) are fixedly connected to the first end of the support frame (206) and arranged sequentially along the circumference of the first end. The second end of the support frame (206) is fixedly connected inside the wind turbine.

6. The blade locking device based on a wind turbine generator according to claim 5, characterized in that, The support frame (206) is L-shaped.

7. The blade locking device based on a wind turbine generator according to claim 5, characterized in that, The connecting mechanism includes a fixing plate (208), and the second end of the support frame (206) is fixedly connected to the wall inside the wind turbine through the fixing plate (208).

8. The blade locking device based on a wind turbine generator according to claim 3, characterized in that, The hub (1) has a first threaded hole (202), the connecting plate (204) has a second threaded hole (205), and the blade locking device (2) includes a first bolt (207). The first bolt (207) is threaded into the first threaded hole (202) and the second threaded hole (205) respectively to fix the connecting plate (204) on the hub (1).

9. The blade locking device based on a wind turbine generator according to claim 8, characterized in that, Each of the connecting plates (204) has at least two second threaded holes (205), and the at least two second threaded holes (205) are arranged along the length direction of the connecting plate (204).

10. The blade locking device based on a wind turbine generator according to claim 7, characterized in that, The fixing plate (208) has a third threaded hole (209), and the blade locking device (2) includes a second bolt (210). The second bolt (210) is threadedly connected to the third threaded hole (209). The fixing plate (208) is connected to the wall inside the wind turbine through the second bolt (210) and the third threaded hole (209).

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