Wind turbine blade vibration suppression device and mounting and dismounting method thereof

Abstract

The invention discloses a wind turbine blade vibration suppression device and a mounting and dismounting method thereof.The wind turbine blade vibration suppression device comprises a plurality of vibration suppression units, the multiple vibration suppression units are sequentially spliced in the spanwise direction of a blade and arranged in a vibration sensitive area of the blade, and the circumferential size of each vibration suppression unit is matched with the circumferential size of the corresponding mounting position of the vibration suppression unit on the blade; the top of the vibration suppression unit closest to the blade root is connected with a traction rope, the bottom of the vibration suppression unit closest to the blade tip is connected with a dismantling rope, the traction rope and the dismantling rope are fixed into a hub of the wind turbine, and each vibration suppression unit comprises a front edge vibration suppression assembly, a tail edge vibration suppression assembly, a top braid and a bottom braid. The front edge vibration suppression assembly is arranged on the front edge of the blade, the top of the front edge vibration suppression assembly and the top of the tail edge vibration suppression assembly are connected through a top braid, and the bottom of the front edge vibration suppression assembly and the bottom of the tail edge vibration suppression assembly are connected through a bottom braid. According to the invention, the problem of blade vibration of the wind turbine blade under the shutdown condition after grid connection can be effectively solved.

Description

Technical Field

[0001] This invention relates to the technical field of wind power generation, and in particular to a wind turbine blade vibration suppression device and its installation and dismantling methods. Background Technology

[0002] Wind turbine blades experience significant and large-amplitude wobbling vibrations during transportation, hoisting, pre-grid connection idling, and post-grid connection power outages that prevent yaw, which reduces blade safety. While existing technologies can suppress blade vibration to some extent, most methods only apply to blade vibration before grid connection, requiring the removal of vibration damping accessories before operation. There are no methods applicable to suppressing blade vibration during post-grid connection shutdown. Furthermore, existing vibration damping accessories typically cover the entire blade surface and are of fixed size, resulting in poor compatibility between different blades. Damage to these accessories prevents reuse, significantly increasing operating costs. Summary of the Invention

[0003] The primary objective of this invention is to overcome the shortcomings of the prior art and provide a wind turbine blade vibration suppression device that can effectively solve the problem of wind turbine blade vibration during shutdown after grid connection.

[0004] The second objective of this invention is to provide an installation method for a wind turbine blade vibration suppression device.

[0005] The third objective of this invention is to provide a method for dismantling a wind turbine blade vibration suppression device.

[0006] The first objective of this invention is achieved through the following technical solution: A wind turbine blade vibration suppression device includes multiple vibration suppression units, which are sequentially spliced ​​along the blade span and positioned in the vibration-sensitive area of ​​the blade. The circumferential dimension of each vibration suppression unit matches the circumferential dimension of its corresponding installation position on the blade. A traction rope is connected to the top of the vibration suppression unit closest to the blade root, and a removal rope is connected to the bottom of the vibration suppression unit closest to the blade tip. The traction rope and removal rope are respectively fixed to the hub of the wind turbine. Each vibration suppression unit includes a leading-edge vibration suppression component, a trailing-edge vibration suppression component, a top webbing, and a bottom webbing. The leading-edge vibration suppression... The components are located at the leading edge of the blade to disrupt the blade's aerodynamic shape and reduce the airfoil's lift coefficient, so that the airfoil's lift line slope remains gentle after stall. The trailing edge damping component is located at the trailing edge of the blade to protect the trailing edge and increase drag. The tops of the leading edge damping component and the trailing edge damping component are connected by a top webbing, and the bottoms of the leading edge damping component and the trailing edge damping component are connected by a bottom webbing. The distance between the leading edge damping component and the trailing edge damping component can be adjusted by adjusting the length of the top webbing and the bottom webbing to adapt to the chord length and thickness distribution that varies along the blade's span.

[0007] Furthermore, the leading edge vibration damping assembly includes a leading edge vibration damping body, a leading edge sealing edge, and leading edge rope holes. The leading edge vibration damping body is disposed at the leading edge of the blade, and it starts from 30% to 50% of the chord length of the suction surface of the blade, wraps around the leading edge, and wraps around 30% to 50% of the chord length of the pressure surface of the blade. Leading edge sealing edges are respectively provided at the four edges of the leading edge vibration damping body, and multiple leading edge rope holes are respectively provided on the leading edge sealing edges at the top and bottom. Hooks for connecting adjacent vibration damping units are provided on the leading edge rope holes.

[0008] Furthermore, the leading edge vibration damping body has a mesh structure and is made of sandpaper material.

[0009] Furthermore, the trailing edge vibration damping assembly includes a trailing edge vibration damping body, a trailing edge sealing edge, and trailing edge rope holes. The trailing edge vibration damping body is disposed on the trailing edge of the blade, and it starts from 70% to 80% of the chord length of the suction surface of the blade, wraps around the trailing edge, and wraps around 70% to 80% of the chord length of the pressure surface of the blade. Trailing edge sealing edges are respectively provided on the four edges of the trailing edge vibration damping body, and multiple trailing edge rope holes are respectively provided on the trailing edge sealing edges located at the top and bottom. Hooks for connecting adjacent vibration damping units are provided on the trailing edge rope holes.

[0010] Furthermore, the trailing edge vibration damping body is made of dense mesh, pearl cotton, or foam material.

[0011] Furthermore, the top and bottom webbing are respectively provided with adjustment buckles for adjusting the length of the webbing, and the adjustment buckles are fixed to the leading edge vibration damping component or the trailing edge vibration damping component.

[0012] Furthermore, the top webbing is provided with a top rope hole for connecting the traction rope, and the bottom webbing is provided with a bottom rope hole for connecting the removal rope. One end of the traction rope and the removal rope are respectively connected to the top webbing and the bottom webbing, and the other end is respectively fixed to the hub of the wind turbine.

[0013] Furthermore, the tops of the leading edge damping assembly and the trailing edge damping assembly, which are closest to the blade root, are respectively connected to guide ropes for adjusting the damping unit in the chordal direction of the blade.

[0014] The second objective of this invention is achieved through the following technical solution: A method for installing a wind turbine blade vibration suppression device, comprising the following steps: S1. Determine the spanwise installation length of multiple vibration damping units based on the vibration-sensitive area of ​​the blade, and then splice the multiple vibration damping units sequentially. S2. Based on the circumferential dimensions of the blades, determine the lengths of the top and bottom webbing of each vibration damping unit and adjust them to the target lengths. S3. Control the wind turbine to stop, so that one of the blades is within a vertical downward ±10° range, and lock the blade's impeller; S4. Lower the traction rope and removal rope from the hub, and connect the traction rope to the head of the multiple vibration damping units, that is, the top of the vibration damping unit closest to the blade root, and connect the removal rope to the tail of the multiple vibration damping units, that is, the bottom of the vibration damping unit closest to the blade tip. S5. Connect guide ropes to both sides of the head of multiple vibration damping units, that is, to the top of the leading edge vibration damping assembly and the trailing edge vibration damping assembly closest to the blade root. S6. Pull the traction rope inside the wheel hub and control two guide ropes on the ground respectively. After the tails of multiple vibration damping units are lifted off the ground, pull the removal rope inside the wheel hub. S7. When the heads of multiple vibration damping units are moved close to the blade tip, the position of the vibration damping units in the chord direction of the blade is adjusted by two guide ropes, so that the vibration damping units are wrapped around the preset position of the blade. S8. By tightening the traction rope and removing the rope, multiple vibration damping units are moved along the blade span until the entire damping device is fitted onto the blade, and the vibration damping unit closest to the blade tip is stuck at the blade tip position. Then, the traction rope and removing rope are fixed in the hub respectively, and the guide rope is removed. S9. Loosen the impeller and rotate or idle the other blade to a vertical downward ±10° range. Lock the impeller and repeat steps S4 to S8 until the installation of the suppression device for all blades is completed.

[0015] The third objective of this invention is achieved through the following technical solution: A method for dismantling a wind turbine blade vibration suppression device includes, After the unit maintenance is completed, rotate any blade or idle the blade to vertical downwards, then untie the removal rope inside the hub. After the removal rope naturally falls to the ground, untie the traction rope, and the suppression device will fall off naturally under the action of gravity. If the suppression device does not fall off naturally, the suppression device will be removed by manually dragging the removal rope on the ground. Repeat the above steps to remove the suppression devices from the remaining blades.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The suppression device of the present invention only covers the vibration-sensitive area of ​​the blade, with a small coverage area, and has the advantages of simple structure, convenient installation, low cost, expandability, recyclability and reusability.

[0017] 2. The suppression device of the present invention adopts a modular structure. Compared with the integral structure, when a part is damaged, the damaged and ineffective unit can be replaced separately. It can also expand the overall length of the suppression device as needed to meet the application requirements of blades of different lengths.

[0018] 3. The suppression device of the present invention can be flexibly adjusted in size to adapt to local size changes of the blade, thus improving the conformability of the suppression device. It is not only suitable for vibration suppression of blades after grid connection, but also for vibration suppression of blades before hoisting and grid connection.

[0019] 4. The suppression device of the present invention can effectively reduce the lift of the airfoil, increase the drag, reduce the absolute value of the negative slope of the lift line, and increase the blade damping, thereby achieving a good vibration suppression effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the suppression device of the present invention.

[0021] Figure 2 This is a schematic diagram showing the connection between adjacent vibration damping units in this invention.

[0022] Figure 3 This is a schematic diagram of the coverage area of ​​the suppression device in this invention.

[0023] Figure 4 This is a schematic diagram of the structure of a single vibration damping unit in this invention.

[0024] Figure 5 This is a schematic diagram of the vibration damping unit closest to the blade tip in this invention.

[0025] Figure 6 This is a schematic diagram of the installation of the suppression device of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example 1: like Figure 1As shown, this embodiment provides a wind turbine blade vibration suppression device, including multiple vibration suppression units 1. These multiple vibration suppression units 1 are sequentially spliced ​​along the spanwise direction of the blade 2 and are disposed in the vibration-sensitive area of ​​the blade 2. The vibration suppression units 1 pose no risk of damage to the surface of the blade 2. The number of vibration suppression units 1 can be determined according to the length of the vibration-sensitive area of ​​the blade 2. The circumferential dimension of each vibration suppression unit 1 matches the circumferential dimension of its corresponding installation position on the blade 2. The top of the vibration suppression unit 1 closest to the blade root of the blade 2 is connected to a traction rope 4, and the bottom of the vibration suppression unit 1 closest to the blade tip of the blade 2 is connected to a removal rope 5. The traction rope 4 and the removal rope 5 are respectively fixed to the hub 3 of the wind turbine. The vibration suppression unit 1 includes a leading edge vibration suppression component 101, a trailing edge vibration suppression component 102, a top webbing 103, and a bottom webbing 104. 4. The leading edge damping component 101 is disposed on the leading edge 201 of the blade 2 to disrupt the aerodynamic shape of the blade 2 and reduce the airfoil lift coefficient so that the airfoil lift line slope remains gentle after stall. The trailing edge damping component 102 is disposed on the trailing edge 202 of the blade 2 to protect the trailing edge or trailing edge serrations and increase drag. The tops of the leading edge damping component 101 and the trailing edge damping component 102 are connected by a top webbing 103, and the bottoms of the leading edge damping component 101 and the trailing edge damping component 102 are connected by a bottom webbing 104. The distance between the leading edge damping component 101 and the trailing edge damping component 102 can be adjusted by adjusting the lengths of the top webbing 103 and the bottom webbing 104, so that different damping units 1 have different circumferential sizes to adapt to the chord length and thickness distribution of the blade 2 along the spanwise direction.

[0028] like Figure 2 As shown, the leading edge vibration damping assembly 101 includes a leading edge vibration damping body 1011, a leading edge sealing edge 1012, and a leading edge rope hole 1013. The leading edge vibration damping body 1011 is disposed on the leading edge 201 of the blade 2, and it starts from 30% to 50% of the chord length of the suction surface of the blade 2, wraps around the leading edge, and wraps around the pressure surface of the blade 2 to 30% to 50% of the chord length. Figure 3 As shown, the leading edge damping body 1011 has leading edge sealing edges 1012 at its four edges, and multiple leading edge rope holes 1013 are provided on the leading edge sealing edges 1012 at the top and bottom, with hooks 106 for connecting adjacent damping units 1 on the leading edge rope holes 1013. The leading edge damping body 1011 can be a mesh structure, made of a material with an uneven outer surface such as sandpaper.

[0029] The trailing edge vibration damping assembly 102 includes a trailing edge vibration damping body 1021, a trailing edge sealing edge 1022, and a trailing edge rope hole 1023. The trailing edge vibration damping body 1021 is disposed on the trailing edge 202 of the blade 2, and it starts from 70% to 80% of the chord length of the suction surface of the blade 2, wraps around the trailing edge, and wraps around to 70% to 80% of the chord length of the pressure surface of the blade 2. Figure 3As shown, trailing edge vibration suppression bodies 1021 are respectively provided with trailing edge edge seals 1022 at their four peripheral edges, and a plurality of trailing edge rope holes 1023 are respectively provided on the trailing edge edge seals located at the top and bottom. Hanging buckles 106 for connecting adjacent vibration suppression units 1 are provided on the trailing edge rope holes 1023. The trailing edge vibration suppression body 1021 can be a dense mesh, pearl cotton, foam, etc.

[0030] The webbing can be elastic and inelastic webbing, and the webbing needs to have a certain supporting ability to prevent the leading edge vibration suppression component 101 and the trailing edge vibration suppression component 102 from leaning against each other, which is not conducive to installation. Adjusting buckles 105 for adjusting the length of the webbing are respectively provided on the top webbing 103 and the bottom webbing 104. The adjusting buckles 105 are fixed to the leading edge vibration suppression component 101 or the trailing edge vibration suppression component 102. The adjusting buckles 105 can be "day" shaped buckles or other adjusting buckles 105.

[0031] As Figure 4 、 Figure 5 shown, a top rope hole 1031 for connecting the towing rope 4 is provided on the top webbing 103, and a bottom rope hole 1041 for connecting the removal rope 5 is provided on the bottom webbing 104. One ends of the towing rope 4 and the removal rope 5 are respectively connected to the top webbing 103 and the bottom webbing 104, and the other ends are respectively fixed to the hub 3 of the wind turbine.

[0032] The tops of the leading edge vibration suppression component 101 and the trailing edge vibration suppression component 102 closest to the blade root of the blade 2 are respectively connected with a guiding rope 6 for adjusting the chordwise position of the vibration suppression unit 1. During installation, the vibration suppression unit 1 is aligned with the blade tip through the guiding rope 6, which is convenient for installation.

[0033] Embodiment 2: As Figure 6 shown, this embodiment provides an installation method for the wind turbine blade vibration suppression device described in Embodiment 1. When the wind turbine unit needs to be maintained with the network disconnected and the maintenance cannot be completed within 1 day, the unit will be in a state of power failure, unable to yaw, and unable to monitor the vibration data of the unit and give an early warning. At this time, the suppression device needs to be installed after the unit stops. The installation and removal work of the suppression device is carried out when the wind speed is less than 5 m / s.

[0034] The above installation method includes steps, S1. Determine the spanwise installation length of multiple vibration suppression units according to the vibration sensitive area of the blade 2, and splice the multiple vibration suppression units in sequence; S2. Determine the lengths of the top webbing and the bottom webbing of each vibration suppression unit according to the circumferential dimension of the blade 2, and adjust them to the target length; S3. Control the wind turbine to stop, make one of the blades 2 within the range of ±10° vertically downward, and lock the impeller of the blade 2; S4. In the hub 3, two ropes longer than the preset length L1 are reserved at the root of each blade 2. The preset length L1 = blade 2 length + minimum distance from blade tip to ground + reserved length (5m is taken as an example in this embodiment). One rope is a traction rope 4 and the other is a removal rope 5. The traction rope 4 and the removal rope 5 are lowered from the hub 3. The traction rope 4 is connected to the head of multiple vibration damping units, that is, the top of the vibration damping unit closest to the blade root. The removal rope 5 is connected to the tail of multiple vibration damping units, that is, the bottom of the vibration damping unit closest to the blade tip. S5. Connect guide ropes 6 to the top of the leading edge vibration damping component and the trailing edge vibration damping component closest to the blade root on both sides of the head of the multiple vibration damping units. The length of the guide ropes 6 is greater than the preset length L2. The preset length L2 = the extension of the vibration damping unit + the distance from the blade tip to the vibration damping unit closest to the blade tip + the minimum distance from the blade tip to the ground + the reserved length (5m is taken as an example in this embodiment). S6. One worker pulls the traction rope 4 inside the hub 3, and two workers control the two guide ropes 6 on the ground respectively. After the tails of multiple vibration damping units are off the ground, another worker pulls the removal rope 5 inside the hub 3. S7. When the heads of multiple vibration damping units are moved close to the blade tip, adjust the two guide ropes 6 to align the vibration damping units with the blade tip, and adjust the position of the vibration damping units in the chord direction of the blade 2 so that the vibration damping units are wrapped around the preset position of the blade 2. S8. By tightening the traction rope 4 and the removal rope 5, multiple vibration damping units are moved along the spanwise direction of the blade 2 until the entire damping device is fitted onto the blade 2, and the vibration damping unit closest to the blade tip of the blade 2 is locked at the blade tip position. Then, the traction rope 4 and the removal rope 5 are fixed in the preset buckles of the hub 3 respectively, and the guide rope 6 is removed. S9. Loosen the impeller and rotate or idle the other blade 2 to a vertical downward ±10° range. Lock the impeller and repeat steps S4 to S8 until the installation of the suppression device for all blades is completed.

[0035] Example 3: This embodiment provides a method for dismantling the wind turbine blade vibration suppression device described in Embodiment 1, including: After the unit maintenance is completed, rotate any blade or idle the blade to vertical downwards, then untie the removal rope inside the hub. After the removal rope naturally falls to the ground, untie the traction rope, and the suppression device will fall off naturally under the action of gravity. If the suppression device does not fall off naturally, the suppression device will be removed by manually dragging the removal rope on the ground. Repeat the above steps to remove the suppression devices from the remaining blades.

[0036] The methods for replacing and extending the above-mentioned suppression device are as follows: If the damping device has a total of 16 damping units, with the first damping unit located at the blade root and the sixteenth damping unit located at the blade tip, and during use, the eighth damping unit experiences damage to its leading or trailing edge damping body and needs to be replaced, the following steps can be taken: Loosen all the fasteners between the 8th vibration damping unit and the 7th and 9th vibration damping units; Replace the 8th vibration damping unit with a new one, and connect the new vibration damping unit to the 7th and 9th vibration damping units with hooks to complete the replacement.

[0037] When a blade 2 requires 20 vibration damping units, it can be extended by superimposing 4 vibration damping units on the root side of the original first vibration damping unit. After superposition, the vibration damping units are renumbered, starting from the root side and moving towards the tip side.

[0038] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A wind turbine blade vibration suppression device, characterised in that: The vibration suppression unit comprises a front edge vibration suppression assembly, a trailing edge vibration suppression assembly, a top braid and a bottom braid. The front edge vibration suppression assembly is arranged at the front edge of the blade and is used for destroying the aerodynamic shape of the blade, reducing the airfoil lift coefficient, and making the airfoil lift line slope gentle after stall. The trailing edge vibration suppression assembly is arranged at the trailing edge of the blade and is used for protecting the trailing edge of the blade and increasing the resistance. The top of the front edge vibration suppression assembly and the trailing edge vibration suppression assembly is connected through the top braid, and the bottom of the front edge vibration suppression assembly and the trailing edge vibration suppression assembly is connected through the bottom braid. The length of the top braid and the bottom braid is adjusted to adjust the distance between the front edge vibration suppression assembly and the trailing edge vibration suppression assembly, so as to adapt to the chord length and thickness distribution of the blade along the span direction.

2. A wind turbine blade vibration suppression device according to claim 1, characterised in that: The front edge vibration suppression assembly comprises a front edge vibration suppression body, a front edge sealing edge and a front edge rope hole. The front edge vibration suppression body is arranged at the front edge of the blade and wraps from the 30%-50% chord length of the suction surface of the blade to the 30%-50% chord length of the pressure surface of the blade. The four peripheral edges of the front edge vibration suppression body are respectively provided with the front edge sealing edge. The top and bottom front edge sealing edges are respectively provided with a plurality of front edge rope holes. The front edge rope holes are provided with a clasp for connecting adjacent vibration suppression units.

3. A wind turbine blade vibration suppression device according to claim 2, characterised in that: The front edge vibration suppression body is a mesh structure made of sandpaper.

4. A wind turbine blade vibration suppression device according to claim 1, characterised in that: The trailing edge vibration suppression assembly comprises a trailing edge vibration suppression body, a trailing edge sealing edge and a trailing edge rope hole. The trailing edge vibration suppression body is arranged at the trailing edge of the blade and wraps from the 70%-80% chord length of the suction surface of the blade to the 70%-80% chord length of the pressure surface of the blade. The four peripheral edges of the trailing edge vibration suppression body are respectively provided with the trailing edge sealing edge. The top and bottom trailing edge sealing edges are respectively provided with a plurality of trailing edge rope holes. The trailing edge rope holes are provided with a clasp for connecting adjacent vibration suppression units.

5. A wind turbine blade vibration suppression device according to claim 4, characterised in that: The trailing edge vibration suppression body is made of a dense mesh, pearl wool or foam material.

6. A wind turbine blade vibration suppression device according to claim 1, characterised in that: The top braid and the bottom braid are respectively provided with an adjusting buckle for adjusting the length of the braid. The adjusting buckle is fixed to the front edge vibration suppression assembly or the trailing edge vibration suppression assembly.

7. A wind turbine blade vibration suppression device according to claim 1, characterised in that: The top braid is provided with a top rope hole for connecting the traction rope. The bottom braid is provided with a bottom rope hole for connecting the removal rope. One end of the traction rope and the removal rope is respectively connected to the top braid and the bottom braid, and the other end is respectively fixed to the hub of the wind turbine.

8. A wind turbine blade vibration suppression device according to claim 1, characterised in that: The top of the front edge vibration suppression assembly and the trailing edge vibration suppression assembly closest to the blade root is respectively connected with a guide rope for adjusting the position of the vibration suppression unit in the chord direction of the blade.

9. A method of installing a wind turbine blade vibration suppression device according to any one of claims 1 to 8, characterised in that, The method comprises the steps of: S1, determining the spanwise installation length of the plurality of vibration suppression units according to the vibration sensitive region of the blade, and sequentially splicing the plurality of vibration suppression units; S2, according to the circumferential size of the blade, determine the length of the top and bottom belts of each vibration suppression unit, and adjust to the target length; S3, control the wind turbine to stop, so that one of the blades is located within the range of ±10° vertically downward, and lock the impeller of the blade; S4, lower the traction rope and the removal rope from the hub, and connect the traction rope with the head of the plurality of vibration suppression units, i.e. the top of the vibration suppression unit closest to the blade root, and connect the removal rope with the tail of the plurality of vibration suppression units, i.e. the bottom of the vibration suppression unit closest to the blade tip; S5, connect the guide ropes on both sides of the head of the plurality of vibration suppression units, i.e. the top of the leading edge vibration suppression assembly and the trailing edge vibration suppression assembly closest to the blade root respectively; S6, pull the traction rope inside the hub, and control the two guide ropes on the ground respectively, and pull the removal rope inside the hub after the tail of the plurality of vibration suppression units is separated from the ground; S7, when the head of the plurality of vibration suppression units is moved close to the blade tip, adjust the position of the vibration suppression unit in the chord direction of the blade through the two guide ropes, so that the vibration suppression unit is wrapped around the blade at the preset position; S8, move the plurality of vibration suppression units along the blade span by tightening the traction rope and the removal rope, until the entire suppression device is set on the blade, and the vibration suppression unit closest to the blade tip is clamped at the blade tip position, and then fix the traction rope and the removal rope in the hub respectively, and remove the guide ropes; S9, unlock the impeller, and rotate another blade to the vertical downward ±10° range, lock the impeller, and repeat steps S4-S8 until the installation of the suppression device of all blades is completed.

10. A method of removing a wind turbine blade vibration suppression device according to any of claims 1 to 8, characterised in that, After the unit maintenance is completed, rotate any blade to the vertical downward, unlock the removal rope inside the hub, unlock the traction rope after the removal rope naturally slides to the ground, and the suppression device naturally falls off under the action of gravity; if the suppression device does not naturally fall off, manually pull the removal rope on the ground to remove the suppression device; Repeat the above operation to complete the removal of the suppression device of the remaining blades. ​

Images