Support structure of wind turbine blade and wind power generation equipment

Abstract

The invention discloses a supporting structure of wind turbine blades and wind power generation equipment, and relates to the technical field of supporting devices of the wind turbine blades, the supporting structure of the wind turbine blades comprises supporting columns and inhaul cables, the supporting columns are distributed between any two adjacent wind turbine blades, and each supporting column comprises a fixing part and a connecting part; the fixing part is arranged on the spindle, and the connecting part extends from the fixing part to the direction away from the spindle in the radial direction of the spindle. The inhaul cable is arranged outside the main shaft in a surrounding mode, and the inhaul cable is movably connected with the connecting part and the multiple connecting areas alternately, so that the inhaul cable forms a supporting ring for connecting the supporting column and the multiple wind turbine blades in series. By arranging a cooperative structure of the supporting columns and the inhaul cables, loads borne by the wind turbine blades can be effectively dispersed, dynamic changes of the wind turbine blades under the action of strong wind loads are adapted, stress concentration is reduced, and therefore the vibration and instability risks of the wind turbine blades are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade support devices, and in particular to a wind turbine blade support structure and a wind power generation device. Background Art

[0002] As the demand for wind turbine power continues to increase, the length of wind turbine blades is also increasing. Although the increase in blade length can effectively expand the swept area and thus improve the efficiency of wind energy capture, it also requires the blades to bear greater loads, especially torsional loads. With the significant increase in torsional loads, the risk of blade instability increases accordingly.

[0003] At present, in order to improve the stiffness of the blades, ribs are usually set inside the blades, frames are added outside the blades, and high-strength composite materials are applied to enhance the structural strength of the blades to improve their stability.

[0004] However, under the action of strong wind loads, the existing blades will still be subjected to huge loads along the wind direction. The blades will vibrate violently and turn frequently under the action of strong wind loads. The airfoil of the blades will suffer significant changes in the wind attack angle, causing the blades to flap and shimmy, resulting in instability and damage, posing a safety hazard. Summary of the invention

[0005] The main purpose of the present invention is to provide a support structure for wind turbine blades and a wind power generation device, aiming to solve the problem in the prior art that wind turbine blades are prone to instability under strong wind loads.

[0006] To achieve the above-mentioned purpose, the present invention provides a support structure for wind turbine blades, wherein a plurality of wind turbine blades are spaced apart along the circumference of the main shaft, and each wind turbine blade is provided with a connection area;

[0007] The support structure of the wind turbine blade comprises:

[0008] A support column, wherein the support column is distributed between any two adjacent wind turbine blades, and the support column comprises a fixing portion and a connecting portion, wherein the fixing portion is arranged on the main shaft and extends in the radial direction of the main shaft, and the connecting portion extends from the fixing portion in the radial direction of the main shaft in a direction away from the main shaft;

[0009] A cable is arranged outside the main shaft, and the cable is alternately and movably connected to the connecting portion and the plurality of connecting areas, so that the cable forms a support ring that connects the support column and the plurality of wind turbine blades in series, and the connection between the support ring and the connecting portion and the connection between the support ring and each of the connecting areas form a corner, and the corner protrudes outward along the radial direction of the main shaft.

[0010] In one embodiment, the outer wall of the wind turbine blade is formed with an annular groove with a notch facing outward, the annular groove forms the connection area, the cable extends from the notch into the annular groove and is wound along the annular groove and arranged on the outer wall of the wind turbine blade, and the cable is slidably matched with the annular groove.

[0011] In one embodiment, the annular sliding groove is spirally wound on the outer wall of the wind turbine blade along the extension direction of the wind turbine blade.

[0012] In one embodiment, a threaded section is provided on the bottom wall of the annular slide groove which is arranged opposite to the notch, and the threaded section forms a spiral guide groove. The cable extends from the notch into the annular slide groove and is wound along the guide groove and arranged on the outer wall of the wind turbine blade, and the cable is slidably matched with the guide groove.

[0013] In one embodiment, the two ends of the wind turbine blade along its extension direction are respectively a free end and a mounting end, the mounting end is mounted on the main shaft and extends radially along the main shaft, and the free end extends from the mounting end along the radial direction of the main shaft toward a direction away from the main shaft; the annular groove is arranged at an intermediate position between the free end and the mounting end; or, the annular groove is arranged close to the free end.

[0014] In one embodiment, the connecting portion is provided with a through hole, the through hole extends in the radial direction of the support column, and the cable is passed through the through hole and slidably cooperates with the through hole.

[0015] In one embodiment, the connecting portion is provided with a pulley, and the cable is wound around the outer wall of the pulley and slidably engaged with the outer wall of the pulley.

[0016] In one embodiment, a plurality of the support columns are disposed between any two adjacent wind turbine blades, and the plurality of the support columns are spaced apart along the circumference of the main shaft.

[0017] In one embodiment, the cable is one of a steel wire rope, a carbon fiber rope and an ultra-high molecular weight polyethylene rope.

[0018] The present invention also provides a wind power generation device, which uses the above-mentioned support structure for wind turbine blades.

[0019] The technical solution of the present invention provides a cooperative structure of a support column and a cable, so that the wind turbine blade can have high rigidity and stability under strong wind load. The support column is fixed to the main shaft and extends radially to provide stable support for the blade, while the cable is alternately and movably connected with the connecting portion and multiple connecting areas, so that the cable forms a support ring that connects the support column and multiple wind turbine blades in series, thereby enhancing the overall structural stability between the multiple wind turbine blades and the support column. The corner of the support ring protrudes outward along the radial direction of the main shaft, which can effectively disperse the load on each wind turbine blade, adapt to the dynamic changes of the wind turbine blade under strong wind load, reduce stress concentration, thereby reducing the vibration and instability risk of the wind turbine blade, significantly improving the rigidity and stability of the wind turbine blade under strong wind load, and improving the performance and operation safety of the wind turbine, and reducing the downtime caused by damage to the wind turbine blade, ensuring the long-term operation of the wind turbine generator set. In addition, the support rod can effectively increase the swept area of ​​the wind turbine blades, thereby improving the efficiency of capturing wind energy and enhancing the overall performance of the wind turbine. Moreover, the support rod and cable structure are lightweight parts, which reduces the overall structural weight and improves the operating efficiency and economic benefits of the wind turbine. The coordinated structure of the support column and the cable enables the wind turbine blades to better adapt to changes in wind speed and direction, improves the environmental adaptability of the wind turbine generator set, and provides a more stable and reliable solution for wind power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of an embodiment of a support structure for a wind turbine blade provided by the present invention;

[0022] Figure 2 A schematic structural diagram of another embodiment of the support structure of a wind turbine blade provided by the present invention;

[0023] Figure 3 A schematic structural diagram of an annular chute according to an embodiment of the present invention;

[0024] Figure 4 A schematic structural diagram of an embodiment of a support rod provided by the present invention;

[0025] Figure 5 A schematic structural diagram of another embodiment of the support rod provided by the present invention.

[0026] Description of Figure Numbers:

[0027] 10. wind turbine blade; 20. main shaft; 11. connection area; 101. annular slide groove; 111. threaded section; 102. guide groove; 12. free end; 13. mounting end;

[0028] 100, support column; 103, through hole; 200, cable; 210, support ring; 211, corner; 110, fixing part; 120, connecting part; 300, pulley.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[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 described embodiments 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 creative work are 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 indication 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. 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 contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] At present, in order to improve the stiffness of the blades, ribs are usually set inside the blades, frames are added outside the blades, and high-strength composite materials are applied to enhance the structural strength of the blades to improve their stability.

[0034] However, under the action of strong wind loads, the existing blades will still be subjected to huge loads along the wind direction. The blades will vibrate violently and turn frequently under the action of strong wind loads. The airfoil of the blades will suffer significant changes in the wind attack angle, causing the blades to flap and shimmy, resulting in instability and damage, posing a safety hazard.

[0035] In order to solve this technical problem, the present invention proposes a supporting structure for wind turbine blades.

[0036] See also Figures 1 to 3 In one embodiment of the present invention, a plurality of wind turbine blades 10 are distributed at intervals along the circumference of a main shaft 20, and each wind turbine blade 10 is provided with a connection area 11; the support structure of the wind turbine blade includes a support column 100 and a cable 200, and a support column 100 is distributed between any two adjacent wind turbine blades 10, and the support column 100 includes a fixing portion 110 and a connection portion 120, the fixing portion 110 is provided on the main shaft 20 and extends in the radial direction of the main shaft 20, and the connection portion 120 is connected from the fixing portion 110 to the main shaft 20. The cable 200 extends in a radial direction away from the main shaft 20; the cable 200 is arranged outside the main shaft 20, and the cable 200 is alternately movably connected to the connecting portion 120 and multiple connecting areas 11, so that the cable 200 forms a support ring 210 that connects the support column 100 and multiple wind turbine blades 10 in series, and the connection between the support ring 210 and the connecting portion 120 and the connection between the support ring 210 and each connecting area 11 are formed with a corner 211, and the corner 211 protrudes outward in the radial direction of the main shaft 20.

[0037] Specifically, the fixing portion 110 of the support column 100 is located on the main shaft 20 and extends in the radial direction of the main shaft 20, so that the support column 100 is fixedly connected to the main shaft 20, so that when the wind turbine blade 10 drives the main shaft 20 to rotate, the support column 100 rotates synchronously with the main shaft 20, and the support column 100 provides support for the wind turbine blade 10 through the cable 200. The connecting portion 120 extends from the fixing portion 110 in the radial direction of the main shaft 20 in a direction away from the main shaft 20, so as to effectively disperse the load caused by the wind force and reduce the risk of instability caused by torsion of the wind turbine blade 10.

[0038] On this basis, the cable 200 is arranged around the main shaft 20, and the cable 200 is alternately and movably connected with the connecting portion 120 and the plurality of connecting areas 11. The support ring 210 formed by the cable 200 can movably connect the support column 100 and the plurality of wind turbine blades 10 as a whole, thereby providing additional stability. The connection between the support ring 210 and the connecting portion 120 and the connection with each connecting area 11 forms a corner 211, which protrudes outward along the radial direction of the main shaft 20. Under the action of wind force, the cable 200 can better adapt to the dynamic changes of the blades, reduce the stress concentration caused by wind load, and thus enhance the overall stability.

[0039] More specifically, the cooperation between the support column 100 and the cable 200 can significantly improve the rigidity and stability of the wind turbine blade 10 under strong wind loads, and reduce the risk of vibration and instability of the wind turbine blade 10. In addition, the support ring 210 with the corner 211 protruding radially outward along the main shaft 20 can evenly distribute the load, improve the overall performance of the wind turbine, and effectively extend the service life of the wind turbine blade 10.

[0040] It should be understood that the active connection between the cable 200, the support column 100 and the connection area 11 enables the cable 200 to form an integral support ring 210, and the support ring 210 sequentially and alternately connects the support column 100 and the plurality of wind turbine blades 10. The support ring 210 can not only effectively connect the plurality of wind turbine blades 10 to form a unified support system, but also evenly distribute the load after the wind turbine blades 10 are subjected to strong wind loads. When the blades are subjected to severe wind loads, the support ring 210 can disperse the load in time, avoiding local damage to the wind turbine blades 10 caused by concentrated stress. It can improve the overall wind resistance of the wind turbine and significantly reduce the risk of blade instability.

[0041] In addition, the connection between the support ring 210 and the connection part 120 and the connection part 11 are formed with a corner 211, and each corner 211 protrudes outward in the radial direction of the main shaft 20. The corner 211 can enhance the connection strength between the cable 200 and the connection part 120 and the connection area 11, so as to effectively guide the transfer of the load, so that the load on the wind turbine blade 10 can be distributed along the support ring 210, avoiding the stress concentration phenomenon caused by the sharp corner. The stability of the wind turbine blade 10 under dynamic load is enhanced.

[0042] The outwardly protruding corner 211 gives the support ring 210 additional anti-twist capability at the connection with the connecting portion 120 and the connecting area 11. It can effectively prevent the support ring 210 from twisting or deforming when subjected to wind load. Compared with the concave corner 211, the outwardly protruding corner 211 can provide stronger support force during load transfer and enhance the stability of the overall structure. When the wind turbine blade 10 vibrates and displaces under the action of strong wind load, the outwardly protruding corner 211 can guide the load to be evenly distributed along the support ring 210, reducing local stress concentration. It ensures that when the support ring 210 is subjected to irregular loads, it can effectively disperse these loads to the entire support structure, thereby reducing the stress risk of a single component and reducing the probability of instability of the wind turbine blade 10.

[0043] In addition, due to the alternating active connection between the cable 200 and the connecting portion 120 and the connecting area 11, the structure of the support ring 210 can flexibly adapt to different wind load conditions. In the case of strong winds or sudden airflows, the support ring 210 can move freely within a certain range. This dynamic adaptability helps to reduce the direct impact of wind loads on the wind turbine blades 10 and reduce the transmission of vibrations, so that the stability and safety of the wind turbine under high load conditions are further improved.

[0044] Moreover, the support structure can effectively reduce the probability of damage caused by instability of the wind turbine blade 10, thereby reducing the frequency of maintenance and overhaul. Long-term stable operation can reduce the time of downtime for repairs, improve the overall operating efficiency of the wind turbine, and thus reduce operating costs. Moreover, the support structure is simple in structure, has little impact on the modification of existing wind power generation equipment, and is easy to be applied to existing wind power generation equipment.

[0045] In the technical solution provided by the present invention, by providing a cooperative structure of a support column 100 and a cable 200, the wind turbine blade 10 can have high rigidity and stability under strong wind loads. The support column 100 is fixed to the main shaft 20 and extends radially to provide stable support for the blade, while the cable 200 is alternately movably connected to the connecting portion 120 and the plurality of connecting areas 11, so that the cable 200 forms a support ring 210 that connects the support column 100 and the plurality of wind turbine blades 10 in series, thereby enhancing the overall structural stability between the plurality of wind turbine blades 10 and the support column 100. The corner 211 of the support ring 210 protrudes outward in the radial direction of the main shaft 20, which can effectively disperse the load on each wind turbine blade 10, adapt to the dynamic changes of the wind turbine blade 10 under strong wind loads, reduce stress concentration, and thus reduce the vibration and instability risks of the wind turbine blade 10, significantly improve the rigidity and stability of the wind turbine blade 10 under strong wind loads, and improve the performance and operational safety of the wind turbine, and reduce the downtime caused by damage to the wind turbine blade 10, thereby ensuring the long-term operation of the wind turbine generator set.

[0046] In addition, the support rod can effectively increase the swept area of ​​the wind turbine blade 10, thereby improving the capture efficiency of wind energy and enhancing the overall performance of the wind turbine. Moreover, the support rod and the cable 200 structure are lightweight parts, which reduces the overall structural weight and improves the operating efficiency and economic benefits of the wind turbine. The coordinated structure of the support column 100 and the cable 200 enables the wind turbine blade 10 to better adapt to changes in different wind speeds and wind directions, improves the environmental adaptability of the wind turbine generator set, and provides a more stable and reliable solution for wind power generation.

[0047] Please continue reading Figure 2As an optional embodiment, multiple support columns 100 are evenly spaced and distributed along the circumference of the main shaft 20. Under strong wind loads, each support column 100 can jointly bear the load borne by the blade, reducing the burden of a single support column 100, thereby enhancing the overall stability between multiple wind turbine blades 10. The cable 200 enables the support ring 210 to connect multiple blades to form a stable support system, so that when the wind turbine is running at extreme wind speeds, the vibration amplitude of the wind turbine blade 10 is significantly reduced, and the safety is improved.

[0048] As another optional embodiment, at the connection between the connecting portion 120 and the cable 200, the cable 200 and the connecting portion 120 are slidably matched, and at the connection between the connecting area 11 and the cable 200, the cable 200 and the connecting area 11 are slidably matched, so that the cable 200 can be dynamically adjusted when subjected to the force of the wind turbine blade 10, so that the support structure of the wind turbine blade can adapt to the ever-changing wind conditions, exhibits better anti-torsion ability compared to traditional static support structures, and the aerodynamic performance of the wind turbine blade 10 is significantly improved.

[0049] Please continue reading Figure 3 In an embodiment of the present invention, the outer wall of the wind turbine blade 10 is formed with an annular groove 101 with a notch facing outward, the annular groove 101 forms a connecting area 11, the cable 200 extends from the notch into the annular groove 101 and is wound along the annular groove 101 and arranged on the outer wall of the wind turbine blade 10, and the cable 200 is slidably matched with the annular groove 101.

[0050] Specifically, the outer wall of the wind turbine blade 10 is formed with an annular slot 101 with a notch facing outward, and the cable 200 extends from the notch into the annular slot 101 and is wound around the outer wall of the wind turbine blade 10 along the annular slot 101. The sliding fit between the cable 200 and the annular slot 101 ensures the freedom of movement of the cable 200 when bearing a load.

[0051] When the wind turbine encounters changing wind speed and direction during operation, the cable 200 can slide within a certain range through the slide groove, effectively reducing the torsional stress caused by wind force changes, thereby reducing the stress concentration phenomenon of the wind turbine blade 10, and further improving the wind resistance of the wind turbine blade 10.

[0052] The cable 200 is wound around the annular slide groove 101 , so that the cable 200 can not only provide additional support to the wind turbine blade 10 , but also reduce the vibration amplitude of the wind turbine blade 10 under strong wind load, thereby reducing the risk of instability.

[0053] Please continue reading Figure 3 In an embodiment of the present invention, the annular slide groove 101 is spirally wound and arranged on the outer wall of the wind turbine blade 10 along the extension direction of the wind turbine blade 10 .

[0054] Specifically, the spiral winding arrangement of the annular chute 101 can adapt to wind loads in different directions during the operation of the wind turbine blade 10. Since the direction and strength of the wind often change, the movement of the cable 200 in such a spiral chute can effectively reduce the torsional stress caused by the change in wind force. The cable 200 can slide and adjust its position accordingly, thereby reducing the stress concentration and local fatigue between the cable 200 and the annular chute 101.

[0055] Through the spiral winding of the annular slide groove 101, the cable 200 can reasonably distribute stress during its movement to form a dynamic support system. Especially under strong wind conditions, the cable 200 can adjust its position within a certain range as the wind turbine blade 10 vibrates, reducing the vibration amplitude of the wind turbine blade 10 and improving the wind resistance of the wind turbine blade 10. The stability of the wind turbine blade 10 under extreme weather conditions is significantly improved, reducing the risk of instability.

[0056] Please continue reading Figure 3 In an embodiment of the present invention, a threaded section 111 is provided on the bottom wall of the annular slide groove 101 which is arranged opposite to the notch, and the threaded section 111 forms a spiral guide groove 102. The cable 200 extends from the notch into the annular slide groove 101 and is wound along the guide groove 102 and arranged on the outer wall of the wind turbine blade 10, and the cable 200 is slidably matched with the guide groove 102.

[0057] It should be noted that the threaded segment 111 is preferably a threaded segment 111 in the form of a positive thread. The positive thread can provide a more uniform and stable connection for the sliding fit between the cable 200 and the annular groove 101, thereby reducing the loosening of the cable 200 due to thread wear and reducing the traction and tensioning capacity of the cable 200 on the wind turbine blade 10.

[0058] Specifically, a threaded segment 111 is provided on the bottom wall of the annular slide groove 101 which is arranged opposite to the notch, and the threaded segment 111 forms a spiral guide groove 102, which is used to guide the sliding path of the cable 200 so that the cable 200 can be wound and slide along the guide groove 102 in the slide groove.

[0059] When the cable 200 extends from the notch into the annular slide groove 101 and winds along the guide groove 102, the sliding track of the cable 200 will be limited to the threaded section 111. The freedom of movement of the cable 200 under wind load is effectively reduced, ensuring its stability and directionality during the force process and avoiding deviation caused by random vibration.

[0060] During operation, especially under strong wind load, the cable 200 can more effectively disperse the load applied to the wind turbine blade 10 through the sliding fit of the guide groove 102, reducing material fatigue and damage caused by stress concentration, which helps to improve the stability of the wind turbine blade 10 in a dynamic environment and reduce the risk of instability.

[0061] In an embodiment of the present invention, the two ends of the wind turbine blade 10 along its extension direction are respectively a free end 12 and a mounting end 13, the mounting end 13 is mounted on the main shaft 20 and extends radially along the main shaft 20, and the free end 12 extends from the mounting end 13 along the radial direction of the main shaft 20 toward a direction away from the main shaft 20; the annular groove 101 is arranged at an intermediate position between the free end 12 and the mounting end 13; or, the annular groove 101 is arranged close to the free end 12.

[0062] Specifically, the setting position of the annular groove 101 helps to balance the force of the cable 200 between the free end 12 and the mounting end 13, and the sliding adaptability of the cable 200 through the annular groove 101 enables the wind turbine blade 10 to effectively disperse the load when subjected to strong wind loads, thereby avoiding local stress concentration.

[0063] More specifically, when the annular slot 101 is located in the middle between the free end 12 and the mounting end 13, the movement of the cable 200 in the slot can evenly distribute the load over the entire length of the wind turbine blade 10. The cable 200 can maintain a good balance during the stretching and contraction process, so that the wind turbine blade 10 can effectively avoid material fatigue or instability caused by local stress concentration when subjected to wind loads, especially when subjected to drastic dynamic loads. This configuration enables the blade to better adapt to various wind speed changes during operation, improve overall stability, and significantly reduce vibration amplitude.

[0064] When the annular groove 101 is arranged close to the free end 12, the winding position of the cable 200 is closer to the force center of the blade. The supporting capacity of the free end 12 is significantly enhanced, so that it exhibits stronger wind resistance under strong wind conditions. Due to the arrangement of the annular groove 101, the cable 200 can more sensitively and flexibly adapt to the dynamic changes of the free end 12, and reduce the vibration amplitude of the free end 12 of the wind turbine blade 10 under strong wind load.

[0065] As a preferred embodiment, the annular groove 101 is arranged near the tip of the wind turbine blade 10, that is, the free end 12, so that the vibration of the wind turbine blade 10 caused by the strong wind load is absorbed or weakened by the cable 200 and the support rod before being transmitted from the free end 12 to the fixed end, thereby further reducing the vibration of the wind turbine blade 10.

[0066] Please continue reading Figures 1 to 3 , and see Figure 4In an embodiment of the present invention, the connecting portion 120 is provided with a through hole 103 , the through hole 103 extends along the radial direction of the support column 100 , and the cable 200 is passed through the through hole 103 and slidably cooperates with the through hole 103 .

[0067] Specifically, the presence of the through hole 103 enables the cable 200 to slide within a certain range relative to the support column 100. The cable 200 can adjust its relative position relative to the support column 100 and the wind turbine blade 10 when subjected to wind load, and avoids the structural stress concentration caused by the fixed connection or jamming of the cable 200 and the support column 100, avoids the support column 100 from being damaged by the stress transmitted by the cable 200, and reduces the maintenance cost. In addition, when the wind speed changes, the sliding ability of the cable 200 ensures that the wind turbine blade 10 can effectively cope with the change of wind load, thereby improving the overall stability and safety. By providing the through hole 103 in the connecting portion 120, the range of movement of the cable 200 is expanded, so that even in the case of large changes in wind force, the cable 200 can adaptively adjust its position relative to the support column 100. The vibration amplitude of the cable 200 itself caused by the change of wind load is significantly reduced, and the risk of damage or instability of the wind turbine blade 10 caused by stress concentration is further avoided.

[0068] Please continue reading Figures 1 to 3 , and see Figure 5 In an embodiment of the present invention, the connection portion 120 is provided with a pulley 300 , and the cable 200 is wound around the outer wall of the pulley 300 and slidingly cooperates with the outer wall of the pulley 300 .

[0069] Specifically, the connection portion 120 is provided with a pulley 300, and an effective dynamic connection is formed between the cable 200 and the pulley 300, so that the cable 200 can slide more smoothly when subjected to wind load and adapt to load changes.

[0070] The pulley 300 reduces the friction and resistance of the cable 200 when it is subjected to force and slides relative to the support column 100, so that the cable 200 can quickly adapt to the position change caused by its own deformation when subjected to external wind load. It can adapt to the deformation process of the cable 200 when the wind load changes, thereby avoiding the jamming phenomenon caused by the fixed connection. Especially under the action of strong wind load, the pulley 300 can effectively reduce the friction resistance between the cable 200 and the support column 100, improve its sliding performance, ensure that the cable 200 can respond to the change of wind force more flexibly, and further reduce the vibration amplitude of the cable 200, the support column 100 and the wind turbine blade 10 caused by dynamic load.

[0071] Please continue reading Figure 2 In the embodiment of the present invention, a plurality of support columns 100 are arranged between any two adjacent wind turbine blades 10 , and the plurality of support columns 100 are distributed at intervals along the circumferential direction of the main shaft 20 .

[0072] It should be noted that multiple support rods can reduce the pressure on a single support rod while dispersing the load of the wind turbine blades 10 and the cable 200, thereby reducing the risk of failure of the overall support structure. On the other hand, increasing the number of support rods can significantly improve the bending resistance of the structure, making it more resistant to bending stress.

[0073] Specifically, the arrangement of multiple support columns 100 can significantly enhance the structural strength of the wind turbine blade 10, so that the wind turbine blade 10 can better withstand the pressure and torsion from the wind load. Multiple support columns 100 are evenly spaced around the blade to ensure the uniform distribution of the supporting force and avoid the occurrence of local stress concentration. The wind turbine blade 10 is more wind-resistant at high wind speeds and the risk of fatigue and damage to the wind turbine blade 10 is reduced.

[0074] More specifically, the plurality of support columns 100 enable each wind turbine blade 10 to obtain a more balanced support force, and can effectively offset the asymmetric load caused by changes in wind direction, especially when subjected to strong wind loads.

[0075] In an embodiment of the present invention, the cable 200 is one of a steel wire rope, a carbon fiber rope and an ultra-high molecular weight polyethylene rope.

[0076] Specifically, different types of cable 200 materials have their own unique properties. Steel wire ropes usually have high tensile strength and can withstand large loads, which are suitable for applications with high strength requirements. Carbon fiber ropes show a good balance between strength and weight. Their excellent lightweight properties can 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.

[0077] The present invention also proposes a wind power generation equipment, which uses a support structure for wind turbine blades as described above. The specific structure of the support structure for the wind turbine blades refers to the above-mentioned embodiment. Since the wind power generation equipment adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0078] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied 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 wind turbine blades (10) are spaced apart and distributed along the circumference of a main shaft (20), characterized in that: Each of the wind turbine blades (10) is provided with a connection area (11); The support structure of the wind turbine blade comprises: A support column (100), wherein the support column (100) is distributed between any two adjacent wind turbine blades (10), and the support column (100) comprises a fixing portion (110) and a connecting portion (120), wherein the fixing portion (110) is arranged on the main shaft (20) and extends in a radial direction of the main shaft (20), and the connecting portion (120) extends from the fixing portion (110) in a direction away from the main shaft (20) in a radial direction of the main shaft (20); A cable (200) is arranged outside the main shaft (20), and the cable (200) is alternately and movably connected to the connecting portion (120) and the plurality of connecting areas (11), so that the cable (200) forms a support ring (210) that connects the support column (100) and the plurality of wind turbine blades (10) in series, and the connection between the support ring (210) and the connecting portion (120) and the connection between the support ring (210) and each of the connecting areas (11) are formed with a corner (211), and the corner (211) protrudes outward along the radial direction of the main shaft (20).

2. The support structure of a wind turbine blade according to claim 1, characterized in that: The outer wall of the wind turbine blade (10) is formed with an annular slide groove (101) with a notch facing outward, and the annular slide groove (101) forms the connection area (11). The cable (200) extends from the notch into the annular slide groove (101) and is wound along the annular slide groove (101) and arranged on the outer wall of the wind turbine blade (10), and the cable (200) is slidably matched with the annular slide groove (101).

3. The support structure of a wind turbine blade according to claim 2, characterized in that: The annular sliding groove (101) is spirally wound and arranged on the outer wall of the wind turbine blade (10) along the extension direction of the wind turbine blade (10).

4. The wind turbine blade support structure according to claim 2, characterized in that: The annular slide groove (101) is provided with a threaded section (111) on the bottom wall thereof which is arranged opposite to the notch, and the threaded section (111) forms a spiral guide groove (102). The cable (200) extends from the notch into the annular slide groove (101) and is wound along the guide groove (102) and arranged on the outer wall of the wind turbine blade (10), and the cable (200) is slidably matched with the guide groove (102).

5. The wind turbine blade support structure according to claim 2, characterized in that: The two ends of the wind turbine blade (10) along its extension direction are respectively a free end (12) and a mounting end (13); the mounting end (13) is mounted on the main shaft (20) and extends radially along the main shaft (20); the free end (12) extends from the mounting end (13) along the radial direction of the main shaft (20) in a direction away from the main shaft (20); the annular groove (101) is arranged at an intermediate position between the free end (12) and the mounting end (13); or, the annular groove (101) is arranged close to the free end (12).

6. The support structure of a wind turbine blade according to any one of claims 1 to 5, characterized in that: The connecting portion (120) is provided with a through hole (103), the through hole (103) extends along the radial direction of the support column (100), and the pull cable (200) is passed through the through hole (103) and slidably cooperates with the through hole (103).

7. The support structure of a wind turbine blade according to any one of claims 1 to 5, characterized in that: The connecting portion (120) is provided with a pulley (300), and the cable (200) is wound around the outer wall of the pulley (300) and is slidably engaged with the outer wall of the pulley (300).

8. The support structure of a wind turbine blade according to any one of claims 1 to 5, characterized in that: A plurality of the support columns (100) are arranged between any two adjacent wind turbine blades (10), and the plurality of the support columns (100) are spaced apart and distributed along the circumference of the main shaft (20).

9. The support structure of a wind turbine blade according to any one of claims 1 to 5, characterized in that: The cable (200) is one of a steel wire rope, a carbon fiber rope and an ultra-high molecular weight polyethylene rope.

10. A wind power generation device, characterized in that: A support structure for a wind turbine blade according to any one of claims 1 to 9 is used.

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