Support structure of wind turbine blade and wind power generation equipment

Abstract

The utility model discloses a supporting structure of wind turbine blades and wind power generation equipment, and relates to the technical field of supporting devices of wind turbine blades, a plurality of wind turbine blades are distributed at intervals in the circumferential direction of a main shaft, and each wind turbine blade is provided with a connecting area; the supporting structure of the wind turbine blades comprises a flexible connecting piece and a plurality of pulley assemblies, the number of the pulley assemblies is consistent with that of the wind turbine blades, the pulley assemblies and the wind turbine blades are arranged in a one-to-one correspondence mode, and all the pulley assemblies are installed in connecting areas of the corresponding wind turbine blades; the flexible connecting piece is arranged outside the main shaft in a surrounding mode, and the flexible connecting piece is movably connected with the multiple wind turbine blades through the multiple pulley assemblies so that the flexible connecting piece can form a supporting ring connected with the multiple wind turbine blades in series. Through the cooperation of the flexible connecting piece and the pulley assembly, the stress distribution of the wind turbine blade can be optimized, the burden of the root of the blade can be reduced, the overall performance and reliability of a wind driven generator can be improved, and the service life of the wind turbine blade can be prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine blade support devices, and in particular to a wind turbine blade support structure and wind power generation equipment. Background Technology

[0002] With the continuous development of wind power technology, wind power has received increasing attention as a clean and renewable energy source.

[0003] In the development of wind power generation technology, the performance of wind turbine blades directly affects the power generation efficiency and reliability of wind turbines. Improving the efficiency and service life of wind turbine blades has become a focus of industry attention.

[0004] Currently, during operation, traditional wind turbine blades are subjected to a large bending moment at the blade root due to the force of the wind, and the burden on the blade root cannot be effectively reduced, which makes the wind turbine blades prone to fatigue damage, thus affecting the overall performance of the wind turbine. Utility Model Content

[0005] The main purpose of this invention is to propose a support structure for wind turbine blades and a wind power generation device, which aims to optimize the stress distribution of wind turbine blades and improve the overall performance and reliability of wind turbine generators.

[0006] To achieve the above objectives, the present invention proposes a wind turbine blade support structure in which multiple wind turbine blades are distributed circumferentially along the main shaft, and each wind turbine blade is provided with a connection area.

[0007] The support structure for the wind turbine blades includes:

[0008] Multiple pulley assemblies, the number of which is the same as the number of wind turbine blades and is arranged in a one-to-one correspondence, and each pulley assembly is installed in the connection area of ​​the corresponding wind turbine blade;

[0009] A flexible connector is provided around the main shaft and is movably connected to multiple wind turbine blades via multiple pulley assemblies, so that the flexible connector forms a support ring connecting multiple wind turbine blades in series.

[0010] In one embodiment, the pulley assembly includes at least one pulley body, the pulley body being mounted on the connection area of ​​the wind turbine blade, and the flexible connector being wound around the outer wall of the pulley body and slidingly engaging with the outer wall of the pulley body.

[0011] In one embodiment, at least two of the pulley bodies are spaced apart along the length of the wind turbine blade.

[0012] In one embodiment, the pulley body includes a wheel body and an axle body, the axle body extends along the thickness direction of the wind turbine blade, the wheel body is rotatably sleeved on the axle body, and the flexible connector is wrapped around the outer wall of the wheel body and slides in cooperation with the outer wall of the wheel body.

[0013] In one embodiment, the wind turbine blade extends along its length with a blade tip and a connecting shaft end, respectively. The connecting shaft end is mounted on the main shaft and extends radially along the main shaft. The blade tip extends radially from the connecting shaft end in a direction away from the main shaft. The connecting area is located at the middle position between the blade tip and the connecting shaft end.

[0014] In one embodiment, the support structure of the wind turbine blade further includes a plurality of blade tip support components. The number of blade tip support components is the same as the number of wind turbine blades and is arranged in a one-to-one correspondence. The blade tip support components extend along the length direction of the wind turbine blade, and each blade tip support component is tensioned between the blade tip and the connecting area of ​​the corresponding wind turbine blade.

[0015] In one embodiment, one end of each blade tip support assembly is connected to the corresponding blade tip, and the other end of each blade tip support assembly is wrapped around the outer wall of the corresponding pulley assembly and slides in cooperation with the outer wall of the pulley assembly.

[0016] In one embodiment, the blade tip support assembly includes at least one blade tip cable, one end of which is connected to the blade tip and the other end of which is connected to the connection area.

[0017] In one embodiment, at least two of the blade tip cables are spaced apart along the width direction of the wind turbine blade, the distance between the at least two blade tip cables gradually decreases from the connection area toward the blade tip, and the at least two blade tip cables intersect at the blade tip.

[0018] This utility model also proposes a wind power generation device that uses the support structure for wind turbine blades as described above.

[0019] The technical solution of this utility model involves wrapping a flexible connector around the outside of the main shaft and movably connecting it to the wind turbine blades via a pulley assembly with the same number of blades, forming a support ring that connects multiple wind turbine blades in series. When the wind turbine blades are subjected to wind force, the resulting bending moment can be transmitted to adjacent blades through the flexible connector, allowing the blades to support each other, share the force, effectively reduce the burden on the root of individual blades, optimize the force distribution of the blades, improve the fatigue resistance of the blades, and extend their service life. Furthermore, the pulley assembly reduces the friction between the flexible connector and the blades, improves the transmission efficiency of the flexible connector, and reduces energy loss. Simultaneously, the pulley assembly can adjust the tension of the flexible connector according to the movement of the blades, ensuring that the support ring can continuously and stably provide support. Through the cooperation of the flexible connector and the pulley assembly, the force distribution of the wind turbine blades can be optimized, the burden on the blade roots can be reduced, the overall performance and reliability of the wind turbine generator can be improved, and the service life of the wind turbine blades can be extended. Attached Figure Description

[0020] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of an embodiment of the support structure for wind turbine blades provided by this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of an embodiment of the pulley assembly provided by this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of an embodiment of the pulley body provided by this utility model;

[0024] Figure 4 A schematic diagram of the structure of an embodiment of the blade tip support assembly provided by this utility model;

[0025] Figure 5 A schematic diagram of another embodiment of the blade tip support assembly provided by this utility model.

[0026] Explanation of icon numbers:

[0027] 10. Wind turbine blade; 20. Main shaft; 11. Blade tip; 12. Shaft end; 101. Connection area;

[0028] 100. Pulley assembly; 110. Pulley body; 111. Wheel body; 112. Shaft body; 200. Flexible connector; 210. Support ring; 300. Blade tip support assembly; 310. Blade tip cable.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] In the development of wind power generation technology, the performance of wind turbine blades directly affects the power generation efficiency and reliability of wind turbines. Improving the efficiency and service life of wind turbine blades has become a focus of industry attention.

[0034] Currently, during operation, traditional wind turbine blades are subjected to a large bending moment at the blade root due to the force of the wind, and the burden on the blade root cannot be effectively reduced, which makes the wind turbine blades prone to fatigue damage, thus affecting the overall performance of the wind turbine.

[0035] To solve this technical problem, this utility model proposes a support structure for wind turbine blades and a wind power generation device.

[0036] Please see Figures 1 to 3 In one embodiment of this utility model, multiple wind turbine blades 10 are distributed circumferentially along the main shaft 20, and each wind turbine blade 10 is provided with a connection area 101. The support structure of the wind turbine blade includes a flexible connector 200 and multiple pulley assemblies 100. The number of pulley assemblies 100 is consistent with the number of wind turbine blades 10 and is arranged in a one-to-one correspondence. Each pulley assembly 100 is installed in the connection area 101 of the corresponding wind turbine blade 10. The flexible connector 200 is arranged around the main shaft 20 and is movably connected to the multiple wind turbine blades 10 through multiple pulley assemblies 100, so that the flexible connector 200 forms a support ring 210 that connects multiple wind turbine blades 10 in series.

[0037] Specifically, the wind turbine blades 10 are evenly distributed along the circumference of the main shaft 20, that is, the wind turbine blades 10 are arranged in a ring array around the main shaft 20. Each wind turbine blade 10 is provided with a connection area 101 for installing a pulley assembly 100. The connection area 101 can be a reserved installation space on the wind turbine blade 10 or an auxiliary installation structure. The number of pulley assemblies 100 is equal to the number of wind turbine blades 10, and each pulley assembly 100 is installed one-to-one on the connection area 101 of each wind turbine blade 10.

[0038] The flexible connector 200 can be made of flexible materials in the form of cables, ropes, belts, etc., possessing a certain degree of flexibility and strength. The flexible connector 200 surrounds the outside of the main shaft 20, forming a closed ring structure. The flexible connector 200 is movably connected to the wind turbine blades 10 via pulley assemblies 100, meaning the flexible connector 200 passes sequentially through each pulley assembly 100, allowing relative movement between the flexible connector 200 and the wind turbine blades 10. Simultaneously, through the support and guidance of the pulley assemblies 100, the flexible connector 200 can transmit tension between the wind turbine blades 10, forming a support ring 210 connecting multiple wind turbine blades 10 in series.

[0039] More specifically, when a wind turbine blade 10 is subjected to wind force, the bending moment generated can be transferred to adjacent wind turbine blades 10 through the flexible connector 200, allowing the wind turbine blades 10 to support each other and share the force. This effectively reduces the load on the root of a single wind turbine blade 10, optimizes the force distribution of the wind turbine blade 10, thereby improving the fatigue resistance of the wind turbine blade 10 and extending its service life.

[0040] Furthermore, the pulley assembly 100 reduces the friction between the flexible connector 200 and the wind turbine blade 10, improving the transmission efficiency of the flexible connector 200 and reducing energy loss. Simultaneously, the pulley assembly 100 can adjust the tension of the flexible connector 200 according to the motion state of the wind turbine blade 10, ensuring that the support ring 210 can continuously and stably perform its supporting function.

[0041] In the technical solution provided by this utility model, a flexible connector 200 is wrapped around the outside of the main shaft 20 and is movably connected to the wind turbine blades 10 through a pulley assembly 100, the number of which is the same as the number of wind turbine blades 10, forming a support ring 210 that connects multiple wind turbine blades 10 in series. When the wind turbine blades 10 are subjected to wind force, the resulting bending moment can be transmitted to adjacent wind turbine blades 10 through the flexible connector 200, so that the wind turbine blades 10 can support each other, share the force, effectively reduce the burden on the root of a single wind turbine blade 10, optimize the force distribution of the wind turbine blades 10, improve the fatigue resistance of the wind turbine blades 10, and extend their service life. In addition, the pulley assembly 100 can reduce the friction between the flexible connector 200 and the wind turbine blades 10, improve the transmission efficiency of the flexible connector 200, and reduce energy loss. Meanwhile, the pulley assembly 100 can adjust the tension of the flexible connector 200 according to the motion state of the wind turbine blade 10, ensuring that the support ring 210 can continuously and stably perform its supporting function. Through the cooperation of the flexible connector 200 and the pulley assembly 100, the stress distribution of the wind turbine blade 10 can be optimized, the burden on the blade root can be reduced, the overall performance and reliability of the wind turbine generator can be improved, and the service life of the wind turbine blade 10 can be extended.

[0042] As an optional implementation, the pulley assembly 100 includes a mounting frame, a movable pulley, and a fixed pulley. The mounting frame is fixed to the connection area 101 of the wind turbine blade 10 and provides mounting support for the movable and fixed pulleys. Both the movable and fixed pulleys are rotatably mounted on the mounting frame, and their rotation axes are parallel. The movable pulley cooperates with a flexible connector 200, which is wound around the groove of the movable pulley, allowing the movable pulley to rotate under the drive of the flexible connector 200, while simultaneously applying tension to the flexible connector 200. The movable pulley can employ a bearing structure to reduce rotational friction and improve transmission efficiency. The fixed pulley is fixed to the mounting frame and cannot rotate; its function is to provide support and guidance for the flexible connector 200. The flexible connector 200 passes through the movable pulley, around the fixed pulley, and then extends to the pulley assembly 100 on the next wind turbine blade 10. The fixed pulley can employ a sliding bearing or a fixed shaft structure to reduce manufacturing costs. In this embodiment, the cooperation between the movable and fixed pulleys enables automatic adjustment of the tension and transmission direction of the flexible connector 200 during the movement of the wind turbine blades 10. When a wind turbine blade 10 is subjected to a large wind force, its corresponding movable pulley will rotate under the action of the wind force, pulling the flexible connector 200, thereby pulling the movable pulleys on adjacent wind turbine blades 10, so that adjacent wind turbine blades 10 are also subjected to tension, achieving a mutual support effect. At the same time, the presence of the fixed pulleys ensures that the transmission path of the flexible connector 200 between the wind turbine blades 10 remains stable, preventing the flexible connector 200 from becoming entangled or falling off.

[0043] As an alternative implementation, to further improve the transmission efficiency and reliability of the pulley assembly 100, multiple movable and fixed pulleys can be installed on the mounting frame to form a pulley group. The movable and fixed pulleys in the pulley group are arranged alternately, and the flexible connector 200 is sequentially wound around each movable and fixed pulley, forming a serpentine transmission path and a multi-stage transmission structure. This effectively reduces the force on individual movable and fixed pulleys, extending their service life. Simultaneously, the multi-stage transmission method also increases the contact angle between the flexible connector 200 and the pulley assembly 100, improving friction and preventing slippage of the flexible connector 200.

[0044] As another alternative implementation, the number of wind turbine blades 10 is three, and the flexible connector 200 connects the three wind turbine blades 10 in series to form a support ring 210 with a triangular structure. During the operation of the wind turbine blades 10, the flexible connector 200 can provide additional tension to further distribute the load of the wind turbine blades 10.

[0045] As another alternative implementation, the flexible connector 200 is one of steel wire rope, carbon fiber rope and ultra-high molecular weight polyethylene rope.

[0046] Specifically, different types of flexible connectors 200 possess their own unique properties. Steel wire ropes typically have high tensile strength, enabling them to withstand large loads and making them suitable for applications requiring high strength. Carbon fiber ropes exhibit a good balance between strength and weight; their excellent lightweight characteristics effectively reduce the overall structural burden and enhance the energy efficiency of wind turbines. Ultra-high molecular weight polyethylene ropes, with their extremely high tensile strength and corrosion resistance, are suitable for use in harsh environments, ensuring long-term operational stability.

[0047] Please continue reading. Figure 2 and Figure 3 In an embodiment of the present invention, the pulley assembly 100 includes at least one pulley body 110, the pulley body 110 is installed in the connection area 101 of the wind turbine blade 10, and the flexible connector 200 is wrapped around the outer wall of the pulley body 110 and slides in cooperation with the outer wall of the pulley body 110.

[0048] Specifically, the pulley body 110 can be cylindrical, spherical, or other shapes suitable for winding the flexible connector 200, with a smooth outer surface to reduce friction with the flexible connector 200. The pulley body 110 is mounted on the connection area 101 of the wind turbine blade 10 via bearings or other rotary connections, allowing the pulley body 110 to rotate freely under the traction of the flexible connector 200.

[0049] The flexible connector 200 is wound around the outer wall of the pulley body 110 and slides in contact with the outer wall of the pulley body 110. When the wind turbine blade 10 is subjected to wind force, the flexible connector 200 will generate tension under the action of wind force, and through the sliding contact with the pulley body 110, the tension will be transmitted to the adjacent wind turbine blade 10, so that the wind turbine blades 10 can support each other and share the force.

[0050] During the movement of the wind turbine blade 10, the flexible connector 200 continuously slides on the outer wall of the pulley body 110, changing the winding position and angle. The sliding contact between the pulley body 110 and the flexible connector 200 effectively reduces friction, lowers energy loss, and improves transmission efficiency. Furthermore, because the flexible connector 200 and the pulley body 110 are slidably connected rather than fixedly connected, they can adapt to the rotation and vibration of the wind turbine blade 10, preventing relative displacement between the flexible connector 200 and the pulley body 110 during the movement of the wind turbine blade 10, thereby improving the stability and reliability of the support structure.

[0051] Furthermore, by adjusting the size and shape of the pulley body 110, the contact area and winding angle between the flexible connector 200 and the pulley body 110 can be optimized, further improving the transmission efficiency and support strength of the support structure. For example, increasing the diameter of the pulley body 110 can increase the contact area between the flexible connector 200 and the pulley body 110, improve friction, and prevent the flexible connector 200 from slipping; while using a spherical or conical pulley body 110 can ensure that the flexible connector 200 maintains good contact with the pulley body 110 at different angles, improving transmission efficiency.

[0052] It should be noted that multiple pulley bodies 110 can be provided in the pulley assembly 100 to further optimize the transmission path and support strength of the flexible connector 200. For example, two or more pulley bodies 110 can be installed on the connection area 101 of each wind turbine blade 10, so that the flexible connector 200 is wound around each pulley body 110 in sequence to form a multi-stage transmission structure, thereby improving the transmission efficiency and stability of the support structure.

[0053] Please continue reading. Figure 2 In an embodiment of this utility model, at least two pulley bodies 110 are spaced apart along the length of the wind turbine blade 10.

[0054] Specifically, by arranging multiple pulley bodies 110 at intervals along the length of the wind turbine blade 10, the wind force can be distributed more evenly, thereby reducing stress concentration caused by local overload and improving the bending resistance and overall durability of the wind turbine blade 10.

[0055] Furthermore, the use of multiple pulley bodies 110 not only helps to distribute the load but also reduces the wear of individual pulley bodies 110, thereby extending the service life of the pulley assembly 100. During the operation of the wind turbine blade 10, due to the continuous changes in wind force, a single pulley body 110 may bear uneven loads, leading to excessive wear or damage. When multiple pulley bodies 110 are used, the load is more widely distributed across each pulley, thereby reducing the wear rate of each pulley.

[0056] Please continue reading. Figure 3 In an embodiment of this utility model, the pulley body 110 includes a wheel body 111 and a shaft body 112. The shaft body 112 extends along the thickness direction of the wind turbine blade 10. The wheel body 111 is rotatably sleeved on the shaft body 112. The flexible connector 200 is wrapped around the outer wall of the wheel body 111 and slides in cooperation with the outer wall of the wheel body 111.

[0057] Specifically, the shaft 112 provides support for the wheel 111. The wheel 111 rotates around the shaft 112, which reduces the frictional resistance between the flexible connector 200 and the contact surface of the wheel 111, thereby improving operating efficiency.

[0058] The flexible connector 200 surrounds the outer wall of the wheel body 111, which can more evenly distribute the impact of wind pressure and enhance its adaptability to different wind directions. This not only improves the smoothness of the flexible connector 200 during movement, but also effectively extends its service life.

[0059] Please continue reading. Figures 1 to 3 In an embodiment of this utility model, the two ends of the wind turbine blade 10 extending along its length direction are the blade tip 11 and the shaft connection end 12, respectively. The shaft connection end 12 is installed on the main shaft 20 and extends radially along the main shaft 20. The blade tip 11 extends from the shaft connection end 12 radially away from the main shaft 20. The connecting area 101 is located at the middle position between the blade tip 11 and the shaft connection end 12.

[0060] It should be noted that, with Figure 3 Taking the perspective of [the wind turbine blade 10] as an example, the length direction of the wind turbine blade 10 refers to [the direction of the blade's length]. Figure 3 The left and right directions in the middle, the width direction of the wind turbine blade 10 refers to Figure 3 The vertical direction in the image refers to the thickness direction of the wind turbine blade 10 when viewed from above. Figure 3 The direction of the line of sight.

[0061] Specifically, the length direction of the blade is from the shaft end 12 to the blade tip 11. The shaft end 12 is the part connected to the main shaft 20, enabling the wind turbine blade 10 to rotate with the rotation of the main shaft 20. The blade tip 11 is the free end of the wind turbine blade 10 furthest from the main shaft 20. It extends along the radial direction of the main shaft 20 and is in the opposite direction to the main shaft 20.

[0062] The connecting area 101, serving as the mounting location for the pulley assembly 100, is positioned midway between the blade tip 11 and the shaft connector end 12. Since wind speed and pressure are uneven along the blade's length, placing the connecting area 101 in the middle helps to distribute wind loads more evenly to the flexible connector 200 and other wind turbine blades 10, thereby reducing the risk of localized stress concentration and better balancing the wind load distribution experienced by the wind turbine blades 10 during operation. Secondly, it also helps optimize the aerodynamic performance of the wind turbine blades 10. The blade tip 11 of the wind turbine blade 10 has the highest speed and contributes the most to the power output of the wind turbine generator, while the speed near the shaft connector end 12 is lower and has a relatively smaller impact on power output. Placing the connecting area 101 in the middle position minimizes interference with the blade's aerodynamic performance while ensuring structural strength and stability, thus improving wind energy utilization efficiency.

[0063] Please continue reading. Figures 1 to 3 And see Figure 4 and Figure 5In an embodiment of this utility model, the support structure of the wind turbine blade also includes a plurality of blade tip support components 300. The number of blade tip support components 300 is consistent with the number of wind turbine blades 10 and is set in a one-to-one correspondence. The blade tip support components 300 extend along the length direction of the wind turbine blade 10, and each blade tip support component 300 is tensioned between the blade tip 11 and the connecting area 101 of the corresponding wind turbine blade 10.

[0064] Specifically, during wind turbine operation, the blade tip 11 is often the area of ​​most intense vibration due to its high-speed motion and long-distance centrifugal force. This vibration not only affects the operating efficiency of the wind turbine but also leads to structural damage and increased maintenance costs in the long run. The blade tip support assembly 300 effectively disperses the direct impact of wind force and significantly reduces the natural vibration frequency of the blade itself by increasing the structural stiffness of the blade at the blade tip 11.

[0065] More specifically, the blade tip support assembly 300 is tensioned between the connection area 101 and the blade tip 11, providing additional tension to the wind turbine blade 10. This evenly distributes the load from the wind and provides additional structural stability under extreme weather conditions, such as strong winds or sudden changes in wind direction, effectively preventing the wind turbine blade 10 from swiping against the tower. Tower swiping refers to the situation where the wind turbine blade 10 swings excessively due to strong winds, or even collides with the tower. This can cause serious damage to the wind turbine and increase safety risks.

[0066] Please continue reading. Figure 5 In the embodiments of this utility model, one end of each blade tip support component 300 is connected to the corresponding blade tip 11, and the other end of each blade tip support component 300 is wrapped around the outer wall of the corresponding pulley assembly 100 and slides in cooperation with the outer wall of the pulley assembly 100.

[0067] It should be noted that the blade tip support assembly 300 can be connected to the blade tip 11 and the connection area 101 by means of bolt connection, welding connection, hinge connection, etc.

[0068] Specifically, by directly connecting one end of the blade tip support assembly 300 to the blade tip 11, it can be ensured that the support force acts directly on the area of ​​the blade with the greatest vibration, thereby suppressing the vibration of the blade tip 11 to the maximum extent.

[0069] The other end of the blade tip support assembly 300 engages with the outer wall of the pulley assembly 100, forming a movable connection structure. During the movement of the wind turbine blade 10, the blade tip support assembly 300 can slide along with the bending and twisting of the blade, adjusting its stress state and thus avoiding stress concentration caused by the deformation of the wind turbine blade 10. Simultaneously, it also reduces the impact of the blade tip support assembly 300 on the aerodynamic performance of the blade, ensuring that the wind turbine blade 10 maintains good aerodynamic efficiency even at high speeds.

[0070] Furthermore, by integrating the blade tip support assembly 300 with the pulley assembly 100, the number of individual components can be reduced, lowering manufacturing and assembly costs. This also facilitates later maintenance and replacement, improving the maintainability and availability of the wind turbine.

[0071] Please continue reading. Figures 1 to 4 In an embodiment of this utility model, the blade tip support assembly 300 includes at least one blade tip cable 310, one end of which is connected to the blade tip 11, and the other end of which is connected to the connection area 101.

[0072] It should be noted that the leaf tip cable 310 is one of the following: steel wire rope, carbon fiber rope, and ultra-high molecular weight polyethylene rope.

[0073] Specifically, one end of the blade tip cable 310 is connected to the blade tip 11, and the other end is connected to the connection area 101. This effectively transmits the vibration force of the blade tip 11 to the connection area 101, and ultimately distributes it to the entire wind turbine blade 10, thereby achieving vibration reduction and blade stabilization. Simultaneously, because the blade tip cable 310 is in a tensioned state, it also provides a certain amount of prestress, further improving the overall stiffness and stability of the wind turbine blade 10.

[0074] Please continue reading. Figure 4 and Figure 5 In the embodiments of this utility model, at least two blade tip cables 310 are spaced apart along the width direction of the wind turbine blade 10, the distance between the at least two blade tip cables 310 gradually decreases from the connection area 101 to the blade tip 11, and the at least two blade tip cables 310 converge at the blade tip 11.

[0075] It should be understood that increasing the number of tip cables 310 will improve the load-bearing capacity, enhance the overall rigidity of the wind turbine blade 10, and reduce the bending and twisting of the wind turbine blade 10 during operation.

[0076] Specifically, by arranging multiple tip cables 310 at intervals along the width direction on the wind turbine blade 10, and making these cables wider near the blade root in the connection area 101 and gradually converging towards the blade tip 11, a support structure converging towards the blade tip is formed. Because the convergence of all the tip cables 310 at the blade tip 11 creates a mechanically strong point, it provides concentrated support force and enhances the structural rigidity of the wind turbine blade 10 at the blade tip. By enhancing the rigidity of the blade tip, vibrations caused by wind speed changes or different operating conditions can be effectively reduced, thereby improving the operational stability and efficiency of the wind turbine.

[0077] Furthermore, the spacing of multiple tip cables 310 in the width direction can provide a uniform tension distribution, reducing torsion or fatigue damage to the wind turbine blade 10 caused by uneven loads. This improves the structural integrity of the wind turbine blade 10 when facing lateral or irregular wind pressure.

[0078] This utility model also proposes a wind power generation device that uses the wind turbine blade support structure described above. It should be understood that the specific structure of the wind turbine blade support structure refers to the above embodiments. Since this wind power generation device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0079] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A support structure for wind turbine blades, wherein a plurality of said wind turbine blades (10) are circumferentially spaced along a main axis (20), characterized in that, Each of the wind turbine blades (10) is provided with a connection area (101); The support structure for the wind turbine blades includes: Multiple pulley assemblies (100) are provided, the number of which is consistent with the number of wind turbine blades (10) and are arranged in a one-to-one correspondence. Each pulley assembly (100) is installed in the connection area (101) of the corresponding wind turbine blade (10). A flexible connector (200) is disposed outside the main shaft (20). The flexible connector (200) is movably connected to a plurality of wind turbine blades (10) through a plurality of pulley assemblies (100) so that the flexible connector (200) forms a support ring (210) that connects a plurality of wind turbine blades (10) in series.

2. The support structure for wind turbine blades as described in claim 1, characterized in that, The pulley assembly (100) includes at least one pulley body (110), which is mounted on the connection area (101) of the wind turbine blade (10), and the flexible connector (200) is wrapped around the outer wall of the pulley body (110) and slides in cooperation with the outer wall of the pulley body (110).

3. The support structure for wind turbine blades as described in claim 2, characterized in that, At least two of the pulley bodies (110) are spaced apart along the length of the wind turbine blade (10).

4. The support structure for wind turbine blades as described in claim 2, characterized in that, The pulley body (110) includes a wheel body (111) and a shaft body (112). The shaft body (112) extends along the thickness direction of the wind turbine blade (10). The wheel body (111) is rotatably sleeved on the shaft body (112). The flexible connector (200) is wrapped around the outer wall of the wheel body (111) and slides in cooperation with the outer wall of the wheel body (111).

5. The support structure for wind turbine blades as described in any one of claims 1 to 4, characterized in that, The wind turbine blade (10) has a blade tip (11) and a shaft connector (12) extending along its length. The shaft connector (12) is mounted on the main shaft (20) and extends radially along the main shaft (20). The blade tip (11) extends radially from the shaft connector (12) away from the main shaft (20). The connecting area (101) is located at the middle position between the blade tip (11) and the shaft connector (12).

6. The support structure for wind turbine blades as described in claim 5, characterized in that, The support structure of the wind turbine blade also includes multiple blade tip support components (300). The number of blade tip support components (300) is the same as the number of wind turbine blades (10) and they are arranged in a one-to-one correspondence. The blade tip support components (300) extend along the length direction of the wind turbine blade (10). Each blade tip support component (300) is tensioned between the blade tip (11) and the connecting area (101) of the corresponding wind turbine blade (10).

7. The support structure for wind turbine blades as described in claim 6, characterized in that, One end of each blade tip support assembly (300) is connected to the corresponding blade tip (11), and the other end of each blade tip support assembly (300) is wrapped around the outer wall of the corresponding pulley assembly (100) and slides in cooperation with the outer wall of the pulley assembly (100).

8. The support structure for wind turbine blades as described in claim 6, characterized in that, The blade tip support assembly (300) includes at least one blade tip cable (310), one end of which is connected to the blade tip (11) and the other end of which is connected to the connection area (101).

9. The support structure for wind turbine blades as described in claim 8, characterized in that, At least two of the blade tip cables (310) are spaced apart along the width direction of the wind turbine blade (10), the distance between the at least two blade tip cables (310) gradually decreases from the connection area (101) toward the blade tip (11), and the at least two blade tip cables (310) converge at the blade tip (11).

10. A wind power generation device, characterized in that, The support structure for wind turbine blades as described in any one of claims 1 to 9 is applied.

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