Anti-vibration device for fan blade
By installing netting and turbulence-inducing components on the wind turbine blades, the airflow direction is changed, solving the problem of blade vibration during transportation and achieving the effect of reducing vibration and material damage.
Patent Information
- Application Number
- CN202423307812.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-31
AI Technical Summary
During transportation, wind turbine blades vibrate due to airflow fluctuations, causing material fatigue, wear, structural cracking, and noise, which affects safety and service life.
The fan blades are covered with a netting assembly, which is combined with a turbulence-disrupting assembly and a fixing assembly. The turbulence-disrupting assembly changes the airflow direction, disrupts the laminar flow, reduces resistance, and minimizes vibration.
It effectively reduces vibration during wind turbine blade transportation, minimizes material damage, improves safety and service life, and reduces noise impact.
Smart Images
Figure CN223881294U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fan equipment transportation technical field especially a fan blade anti -shaking device. BACKGROUND
[0002] The fan is the mechanical device that will wind energy is converted into electric energy, has sustainable development, green and pollution-free, can provide electric energy for remote and no power grid coverage area and so on.
[0003] With the continuous development of wind power technology, the single machine capacity of fan gradually expands, which also leads to the length of the blade longer and longer, because the regular airflow fluctuation will be generated on the surface of the fan blade during the transportation process, resulting in the fan blade shaking. At the same time, the negative effects of blade shaking are also more obvious, for example, during the transportation process, long-term blade shaking will cause material fatigue, accelerate wear and tear, and even may cause structural rupture or failure, affecting the safety and service life of the fan; It may also produce additional noise, which may affect the judgment of the operator on abnormal conditions, and there is a certain safety risk; It may also cause more widespread vibration transmission due to blade shaking, which will also have a negative impact on the stability of the transportation support structure of the fan blade. SUMMARY
[0004] The technical problem to be solved by the utility model is to provide a fan blade anti-shaking device for the above-mentioned problems.
[0005] The technical scheme adopted by the utility model is: a fan blade anti-shaking device, comprising:
[0006] The net bag assembly is arranged on the surface of the fan blade, and the net bag assembly is used to wrap and cover the fan blade.
[0007] The spoiler assembly is arranged on the outer surface of the net bag assembly, the spoiler assembly is arranged along the axial direction of the fan blade, and the spoiler assembly can change the airflow direction on the surface of the fan blade to disrupt the laminar flow state of the airflow on the surface of the fan blade.
[0008] The fixing assembly is arranged on the surface of the fan blade, and the fixing assembly is used to tighten the net bag assembly to be fixed on the fan blade.
[0009] Through the above technical means, the net bag assembly is fixed on the fan blade by the fixing assembly, so that the net bag assembly wraps and covers the fan blade, the net bag assembly can provide a mounting platform for the spoiler assembly, the spoiler assembly is mounted on the net bag assembly, the spoiler assembly is arranged along the axial direction of the fan blade, and the airflow direction on the surface of the fan blade during the transportation process is changed by the spoiler assembly, so as to promote the mixing of the airflow and reduce the resistance, thereby reducing the shaking of the fan blade.
[0010] In some embodiments, the turbulence assembly comprises a plurality of turbulence blocks and a connecting belt, the turbulence blocks are fixed to the net assembly by the connecting belt, the plurality of turbulence blocks are arranged on the upper surface and the lower surface of the fan blade in the transportation state, and the plurality of turbulence blocks are arranged in an eight-shaped arrangement along the axial direction of the fan blade.
[0011] In some embodiments, the turbulence block is in the shape of a triangular prism, the turbulence block is arranged at an angle of 45°±15°, and the turbulence block is close to the leading edge of the fan blade.
[0012] In some embodiments, the net assembly comprises a net and a closing rope, the net wraps the main body area of the fan blade, and the end of the net is provided with a closing rope for tightening and binding the net port.
[0013] In some embodiments, the net is tightened along the axial and chordal directions of the fan blade, the tightening of the net is achieved by using a binding tape, the gap between the binding tapes is 1000 mm, and the chordal tightening standard of the net is that, in the natural state of the net, the gap between the lowest point of the sag and the lower surface of the fan blade is 250±50 mm.
[0014] In some embodiments, the fixing assembly comprises a fixing rope, the rainproof ring of the fan blade is provided with a pair of fixing holes, a pair of fixing ropes are arranged on the upper and lower surfaces of the fan blade, respectively, pass through the fixing holes along the axial direction of the fan blade, and wrap the blade root joint circle to fix the net assembly, and the redundant part of the fixing rope is fixed on the rope ring of the blade root joint circle by a binding tape.
[0015] In some embodiments, the circumferential position of the first fixing hole in the pair of fixing holes is set to be 300±10 mm away from the mold joint arc on the upper surface of the fan blade in the transportation state, the circumferential position of the second fixing hole is set to be away from the mold joint arc on the upper surface of the fan blade in the transportation state, the second fixing hole is 250±10 mm away from the first fixing hole, and the radial position of the two fixing holes is 50±5 mm vertically upward from the bonding surface of the rainproof ring.
[0016] In some embodiments, the fixing rope is a circular rubber elastic rope, and the circular rubber elastic rope takes the position of the net assembly located on the upper surface and the chordal center of the lower surface of the fan blade as a connection point.
[0017] In some embodiments, the bottom position of the fan blade is also provided with a support for auxiliary support and fixation, the support is provided with a plurality of buffer members abutting against the fan blade, and the fixing assembly passes through the inside of the support to fix the net assembly.
[0018] In some embodiments, the top of the support is provided with a flexible pad plate, and the buffer member comprises a buffer air bag.
[0019] The utility model discloses the beneficial effect is:
[0020] 1, through fixed assembly and tighten the net bag assembly and fix on the fan blade surface, and the net bag assembly can cover the main tremor area of fan blade, utilizes the net bag assembly as the installation platform, installs the spoiler assembly on the net bag assembly, and the spoiler assembly is arranged on the upper and lower surfaces of fan blade under the transportation state, and the spoiler assembly is spaced distribution along the fan blade, utilizes the spoiler assembly to change the aerodynamic direction of fan blade surface, makes the airflow more uniform distribution, breaks the laminar state of airflow, promotes the mixing between airflow, effectively reduces the vortex phenomenon in flow, reduces the resistance, thereby reduces the situation that the fan blade shakes, reduces the risk that the fan blade is damaged due to the shaking of airflow in the transportation process. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the structure schematic diagram of fan blade in the application.
[0022] Figure 2 It is the partial structure schematic diagram of net bag assembly in the application.
[0023] Figure 3 It is the cut structure schematic diagram of the application.
[0024] Figure 4 It is the local structure schematic diagram of rain shield ring in the application.
[0025] Figure 5 It is the overhead arrangement structure schematic diagram of spoiler assembly in the application.
[0026] BRIEF DESCRIPTION OF DRAWINGS
[0027] 1, fan blade;2, net bag;3, spoiler block;4, fixed rope;5, tie;6, rain shield ring;7, fixed hole.
[0028] This specification includes reference "one embodiment" or "embodiment". The appearance phrase "in one embodiment" or "in the embodiment" does not necessarily mean the same embodiment. The specific features, structures or characteristics can be combined in any suitable way consistent with the present disclosure.
[0029] "Include", this term is open. As used in the appended claims, this term does not exclude additional structures or steps. DETAILED DESCRIPTION
[0030] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme of the utility model is further explained below in combination with specific embodiments.
[0031] Embodiment one:
[0032] CombineFigures 1 to 3 As shown, the embodiment is a fan blade anti-shaking device, which comprises a net bag assembly, a spoiler assembly and a fixing assembly. The surface of the fan blade 1 is provided with the net bag assembly and the fixing assembly. The fixing assembly is used to tighten the net bag assembly to be fixed on the fan blade 1, so that the net bag assembly can wrap and cover the fan blade 1. The outer surface of the net bag assembly is provided with the spoiler assembly. The spoiler assembly is arranged along the axial direction of the fan blade 1. The spoiler assembly can change the airflow direction of the surface of the fan blade 1 to disrupt the laminar flow state of the airflow on the surface of the fan blade 1.
[0033] In some embodiments, the bottom position of the fan blade 1 is also provided with a support for auxiliary support and fixation. The support is provided with a plurality of buffer members abutting the fan blade 1. The fixing assembly penetrates the inside of the support to fix the net bag assembly.
[0034] Further, the top of the support is provided with a flexible pad. In the embodiment, the buffer member comprises a buffer air bag.
[0035] In some embodiments, the net bag assembly comprises a net bag 2 and a closing rope. The net bag 2 wraps the main body area of the fan blade 1. The end of the net bag 2 is provided with a closing rope for tightening and binding the port of the net bag 2. Specifically, in the embodiment, the net bag 2 is constructed similarly to a fishing net. The material is ordinary 2mm hemp rope. The size of the rhombus on the net bag 2 is 120mm. In the embodiment, the wrapping area of the net bag 2 is 2m to 27m from the tip of the fan blade 1. The wrapping starts from a position of about 2m. The main consideration is to facilitate construction, facilitate binding of the net bag 2, and avoid the relatively weak part of the tip. The net bag 2 is located at a position of about 27m. The length is 2 / 3 of the distance between the support position and the tip of the fan blade 1 during transportation. The position is sufficient to ensure the area with a larger blade shaking amplitude.
[0036] Further, the net bag 2 is arranged and tightened along the axial and chordal directions of the fan blade 1. The net bag 2 is first tightened along the axial direction to ensure that the arrangement area of the net bag 2 is distributed at a position of 2m to 27m. Then the net bag 2 is tightened along the chordal direction. The tightening of the net bag 2 uses a cable tie 5 for binding. The binding gap is 1000mm. Considering the later removal of the net bag 2, to prevent the net bag 2 from hanging on the blade when it naturally falls and failing to fall, the chordal tightening standard of the net bag 2 is that after the chordal tightening of the net bag 2, the gap between the lowest point of the net bag 2 in a natural state and the lower surface of the fan blade 1 is 250±50mm.
[0037] Further, after the net bag 2 is arranged and tightened, if it is found that the end position of the fan blade 1 is too tight with the net bag 2, 1-2m can be cut from the leading edge and trailing edge areas of the blade end position along the length of the blade to facilitate the later removal.
[0038] In some implementations, the turbulence-disrupting component includes multiple turbulence-disrupting blocks 3 and a connecting belt. The turbulence-disrupting blocks 3 are fixed to the net bag 2 via the connecting belt. The multiple turbulence-disrupting blocks 3 are arranged correspondingly on the upper and lower surfaces of the fan blade 1 in the transport state. The multiple turbulence-disrupting blocks 3 are arranged at intervals along the axial direction of the fan blade 1, and adjacent turbulence-disrupting blocks 3 are arranged in a figure-eight pattern.
[0039] Furthermore, the spoiler block 3 is triangular prism-shaped, with a side length of 300mm and a length of 800mm for the equilateral triangle of the spoiler block 3. Starting from the blade tip net 2, the spoiler blocks 3 are arranged in a figure-eight pattern along the windward and leeward sides of the net 2. The spoiler blocks 3 are arranged at 45°±15°, with the chordal position close to both sides of the leading edge of the fan blade 1, and arranged axially along the fan blade 1 at a distance of 2m, until the end of the net 2. The connecting straps of the spoiler block 3 are fixed to the net 2, passing through at least 3 strands of the net 2 rope, and must be tied with 2 knots.
[0040] In some embodiments, the fixing component includes a fixing rope 4. The rainproof ring 6 of the wind turbine blade 1 is provided with a pair of fixing holes 7. The pair of fixing ropes 4 are respectively arranged on the upper and lower surfaces and the lower surface of the wind turbine blade 1, pass through the fixing holes 7 along the axial direction of the wind turbine blade 1, and wrap around the blade root pitch circle of the wind turbine blade 1 to fix the net bag assembly. The redundant part of the fixing rope 4 is tied and fixed to the rope loop of the blade root pitch circle by a cable tie 5.
[0041] Furthermore, in this embodiment, a pair of fixing holes 7 are formed by drilling with a hand drill on the upper surface (PS) of the wind turbine blade 1 in the transport state and in the mold joint (TE) area at the trailing edge of the blade. Two holes are drilled, with a diameter of φ12~14mm. Considering the convenience of the construction location and to avoid affecting the strength of the mold joint, the specific drilling positions of the two fixing holes 7 are as follows: the circumferential position of the first fixing hole 7 is set on the upper surface of the wind turbine blade 1 in the transport state and 300±10mm away from the arc length of the mold joint; the circumferential position of the second fixing hole 7 is set on the upper surface of the wind turbine blade 1 in the transport state and away from the side of the mold joint; the second fixing hole 7 is 250±10mm away from the first fixing hole 7; and the radial position of the two fixing holes 7 is 50±5mm vertically upward from the bonding surface of the rain guard ring 6.
[0042] Furthermore, the fixing rope 4 is a circular rubber elastic rope with a specification of φ10mm. The circular rubber elastic rope is connected to the net assembly at the chordally centered position on the upper and lower surfaces of the wind turbine blade 1.
[0043] The implementation principle of the anti-vibration device for wind turbine blades in this embodiment is as follows:
[0044] The two surfaces of the blade in the transportation state are evenly installed with the spoiler 3, so that the spoiler 3 can effectively change the aerodynamic direction, make the airflow more evenly distributed, break the laminar state of the airflow, promote the mixing between the airflows, effectively reduce the vortex phenomenon in the flow, reduce the resistance, and thus avoid the phenomenon that the blade tip shakes and damages the blade.
[0045] By adopting the circular rubber elastic rope, the fixed rope 4 can be effectively prevented from damaging the blade when the fixed rope 4 swings due to wind blowing and contacts the surface of the blade.
[0046] Meanwhile, the device has simple structure and strong applicability, and can not only be applied to the transportation process of the fan blade 1, but also be applied to the situation that the blade shakes due to airflow in the hoisting process of the fan blade 1, so as to provide effective protection for the fan blade 1.
[0047] Embodiment Two
[0048] The embodiment is a use method of the fan blade anti-shaking device, and includes the following steps.
[0049] S1, drilling holes on the rain shield ring:
[0050] The position of the hole drilled on the rain shield ring 6 is based on the posture of the blade in the transportation state, and the hole is drilled on the upper surface (PS) of the fan blade 1 and the interval between the fan blade 1 and the trailing edge (TE) in the transportation state by using a pistol drill. The number of holes is two, and the hole diameter is Φ12-14 mm.
[0051] S2, installing the net bag:
[0052] The net bag 2 is unfolded, and is sleeved into the fan blade 1 from the blade tip to the blade root direction. The net bag 2 covers the blade tip 2 m to 27 m. The net bag 2 is installed at the position of about 2 m, mainly considering the convenience of construction, the convenience of net bag 2 binding, and the avoidance of the relatively weak part of the blade tip. The net bag 2 stops at the position of about 27 m. The length is 2 / 3 of the distance between the rear support position in the transportation process of the blade and the blade tip. The position is sufficient to ensure the area with large blade shaking amplitude.
[0053] S3, tightening the net bag:
[0054] The net bag 2 is tightened along the axial and chordal directions of the blade. The net bag 2 is first tightened along the axial direction to ensure that the arrangement area of the net bag 2 is distributed at the position of 2m-27m. The net bag 2 is tightened along the chordal direction. The tightening of the net bag 2 is performed by binding with the binding tape 5, and the binding interval is 1000mm. Considering the removal of the net bag 2 in the later stage, the chordal net bag 2 is tightened according to the following standard: after the chordal net bag 2 is tightened, the clearance between the lowest point of the sagging amount of the net bag 2 in the natural state and the lower surface of the blade is 250±50mm. After the net bag 2 is arranged, if it is found that the end position of the blade is too tight with the net bag 2, 1-2m can be cut off from the leading edge and trailing edge areas of the blade at the end position of the blade along the length direction of the blade, so as to facilitate the removal in the later stage.
[0055] S4, install the spoiler block:
[0056] The spoiler block 3 is arranged and fixed in a figure-eight shape along the net bag 2 from the net bag 2 at the blade tip to the windward surface and the leeward surface. The spoiler block 3 is arranged at 45°±15°, and the chordal position is close to the leading edge on both sides. The spoiler block 3 is arranged along the axial direction of the blade at a distance of 2m until the end of the net bag 2. The connecting belt of the spoiler block 3 is fixed with the net bag 2, and at least passes through more than 3 strands of net ropes of the net bag 2, and 2 dead knots are formed to ensure reliable connection.
[0057] S5, install the fixed rope:
[0058] The fixed rope 4 is a Φ10mm circular rubber elastic rope. First, one end of the two fixed ropes 4 is fixed with the middle position of the chordal thick rope on the upper and lower surfaces of the blade at the end of the net bag 2. The connection between the fixed rope 4 and the net bag 2 needs to pass through at least 5 strands of net ropes and form a dead knot with the chordal thick rope. The two fixed ropes 4 need to pass through the inside of the blade root support. The fixed rope 4 is arranged from the end position of the net bag 2 to the blade root along the upper surface of the blade, then passes through the holes of the rain blocking ring 6 of the blade root, and is placed on the upper surface of the blade in a slightly loose state.
[0059] S6, fix the blade root with the fixed rope:
[0060] After the two fixed ropes 4 pass through the holes of the rain blocking ring 6, the excess length of the ropes is arranged from the rain blocking ring 6 to the blade root position. The two fixed ropes 4 at the hole of the rain blocking ring 6 are bound and tightened with the binding tape 5. After the two rope heads are wound around the first circle of the rope, they are pulled tight. The intersection position is tightened with the binding tape 5. The two ropes are synchronously wound around the blade root circle. The number of winding turns is not less than 2. When the last turn is reached, the rope needs to be ensured at the opening of the rain blocking ring 6. The redundant rope needs to be orderly wound and fixed to the rope circle of the blade root circle with the binding tape 5. It is ensured that the winding rope on the surface of the blade root is attached to the surface of the blade. The non-redundant rope is sagged.
[0061] S7, remove the net bag:
[0062] The net bag 2 on the fan blade 1 is removed, and the removal process is as follows: all the ties 5 on the fixed rope 4 inside the rain cover ring 6 are intermittently removed with diagonal pliers, the end of the nylon rope is tied to the fixed rope (to prevent the fixed rope from hanging on the aviation lamp), the fixed rope 4 is loosened from the blade root circle and slowly released from the hole of the rain cover ring 6, after the fixed rope 4 falls to the ground, the construction personnel make the device fall as a whole by pulling the fixed rope 4. The end of the nylon rope is tied to the fixed rope (to prevent the fixed rope from hanging on the aviation lamp), the fixed rope 4 is loosened from the blade root circle and slowly released from the hole of the rain cover ring 6, after the fixed rope 4 falls to the ground, the construction personnel make the device fall as a whole by pulling the fixed rope 4.
[0063] Further, in step S5, the requirements for the fixed rope 4 are as follows:
[0064] (1) The chordwise central position of the net bag 2 at the installation end position on the upper and lower surfaces of the blade is taken as the connection point of the fixed rope 4 and the net bag 2, and the fixed rope 4 needs to pass through at least 5 net ropes and be fixed with the chordwise thick rope by a dead knot.
[0065] (2) The two fixed ropes 4 need to pass through the inside of the blade root support to avoid interference during the later disassembly of the blade root support.
[0066] (3) The fixed rope 4 is stretched along the direction of the blade to the blade root, the fixed rope 4 on the lower surface of the blade should be slowly stretched from the leading edge of the blade (because the leading edge is a circular arc, it can better avoid the fixed rope 4 scratching the surface paint of the blade) to the upper surface of the blade, the fixed rope 4 is arranged smoothly from the end position of the net bag 2 along the upper surface of the blade to the blade root, and then the two fixed ropes 4 pass through the holes of the rain cover ring 6 of the blade root respectively.
[0067] Further, in step S7, if the device is applied to the hoisting process of the fan, the removal process of the net bag 2 is as follows:
[0068] (1) After the three blades of the fan are hoisted, first rotate the hub using the fan turning tool to make one of the blades vertical to the ground, stop turning, lock the hub with a hydraulic lock, then lock the hub with a mechanical pin, place a "hub under construction" sign at the locking device, and then the construction personnel enter the hub.
[0069] (2) The construction personnel intermittently remove all the ties 5 on the fixed rope 4 inside the rain cover ring 6 with diagonal pliers.
[0070] (3) Loosen the fixed rope 4 from the blade root circle, and pay attention to avoid knotting the rope.
[0071] (4) Slowly release the disassembled fixed rope 4 from the hole of the rain cover ring 6, and let it naturally and slowly fall to the ground.
[0072] (5) After the fixed rope 4 falls to the ground, the ground construction personnel stand on the wind port of the blade and pull the fixed rope 4 to make the device fall as a whole.
[0073] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. A wind turbine blade anti-shake device, characterized in that, The utility model relates to a wind turbine blade fixing device, including: A net bag assembly is arranged on the surface of the wind turbine blade (1), and the net bag assembly is used for wrapping and covering the wind turbine blade (1); A spoiler assembly is arranged on the outer surface of the net bag assembly, and the spoiler assembly is arranged at intervals along the axial direction of the wind turbine blade (1), and the spoiler assembly can change the airflow direction of the surface of the wind turbine blade (1) to disrupt the laminar flow state of the airflow on the surface of the wind turbine blade (1); A fixing assembly is arranged on the surface of the wind turbine blade (1), and the fixing assembly is used for tightening the net bag assembly to fix it on the wind turbine blade (1); The spoiler assembly includes a plurality of spoiler blocks (3) and a connecting belt, the spoiler blocks (3) are fixed to the net bag assembly through the connecting belt, a plurality of spoiler blocks (3) are arranged on the upper surface and the lower surface of the wind turbine blade (1) in the transportation state, and the plurality of spoiler blocks (3) are arranged at intervals along the axial direction of the wind turbine blade (1), and adjacent spoiler blocks (3) are arranged in a splayed manner.
2. A device for preventing buffeting of a wind turbine blade according to claim 1, wherein: The spoiler block (3) is in the shape of a triangular prism, the spoiler block (3) is arranged at an angle of 45°±15°, and the spoiler block (3) is close to the leading edge end of the wind turbine blade (1).
3. A device for preventing buffeting of a fan blade according to claim 1, wherein: The net bag assembly includes a net bag (2) and a closing rope, the net bag (2) wraps the main body area of the wind turbine blade (1), and the end of the net bag (2) is provided with a closing rope for tightening and binding the port of the net bag (2).
4. A device for preventing buffeting of a wind turbine blade according to claim 3, characterised in that: The net bag (2) is arranged and tightened along the axial direction and the chordal direction of the wind turbine blade (1), the tightening of the net bag (2) is cooperated with the binding of the binding belt (5), the binding gap is 1000mm, and the chordal tightening standard of the net bag (2) is that, in the natural state of the net bag (2), the gap between the lowest point of the sag and the lower surface of the wind turbine blade (1) is 250±50mm.
5. A device for preventing buffeting of a fan blade according to claim 1, wherein: The fixing assembly includes a fixing rope (4), a pair of fixing holes (7) are arranged on the rain shield ring (6) of the wind turbine blade (1), and a pair of fixing ropes (4) are arranged on the upper surface and the lower surface of the wind turbine blade (1) along the axial direction of the wind turbine blade (1), pass through the fixing holes (7), and are wound around the root circle of the wind turbine blade (1) to fix the net bag assembly, and the redundant part of the fixing rope (4) is bound and fixed on the rope ring of the root circle through the binding belt (5).
6. A device for preventing buffeting of a wind turbine blade according to claim 5, wherein: The circumferential position of the first fixing hole (7) in the pair of fixing holes (7) is set to be 300±10mm away from the mold joint arc on the upper surface of the wind turbine blade (1) in the transportation state, the circumferential position of the second fixing hole (7) is set to be away from the side of the mold joint on the upper surface of the wind turbine blade (1) in the transportation state, the second fixing hole (7) is 250±10mm away from the first fixing hole (7), and the radial position of the two fixing holes (7) is 50±5mm vertically upward from the bonding surface of the rain shield ring (6).
7. A device for preventing buffeting of a fan blade according to claim 5, wherein: The fixing rope (4) is a circular rubber elastic rope, and the circular rubber elastic rope takes the position of the net bag assembly on the upper surface and the lower surface of the wind turbine blade (1) as the connecting point.
8. A device for preventing buffeting of a fan blade according to claim 1, wherein: A support is further arranged at the bottom position of the wind turbine blade (1) for auxiliary support and fixation, a plurality of buffer members abutting against the wind turbine blade (1) are arranged on the support, and the fixing assembly passes through the inside of the support to fix the net bag assembly.
9. A device for preventing buffeting of a wind turbine blade according to claim 8, characterised in that: The support top is provided with a flexible cushion plate, and the buffer member comprises a buffer air bag.