Dismounting and mounting method for anti-tremor suite of wind power blade

Abstract

The invention discloses a disassembly and assembly method for a wind power blade anti-vibration kit. The method comprises the installation steps that S1, a blade is wrapped with an anti-vibration net cover; s2, a fixing rope is used for locking the anti-vibration net sleeve in the blade tip area, and the fixing rope penetrates through the anti-vibration net sleeve in the blade rear edge area in a penetrating mode; s3, the main rope penetrates through the air hole buckles in the front edge areas of the blades in a slipknot buckle mode, and the shockproof net cover is locked; s4, the turbulent flow blocks are locked on the anti-vibration net sleeves of the pressure surfaces and the suction surfaces of the blades correspondingly; s5, the front edge protection block is locked on the surface of the blade through the wire harness belt, and the main rope with the slipknot buckle locked is locked on the hook-and-loop fastener of the wire harness belt; s6, wiring harness belts and front edge protection blocks are arranged in front of the maximum chord length of the blade, at the position 1 / 3 away from the blade root and at the end position, at the blade root, of the shockproof net sleeve; and S7, the fixing rope and the main rope penetrate through the blade root rivet hole, and the redundant rope is wound around the blade root. The method has the characteristics of simple principle, convenience in disassembly and assembly, high reliability and the like, and is an effective means for preventing the blade from tremor.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a method for disassembling and assembling a wind turbine blade anti-vibration kit. Background Technology

[0002] Currently, the main methods commonly used by OEMs and blade manufacturers to prevent vortex-induced vibration / flutter in blades are as follows: (1) A vibration damping component is formed by covering the turbulence block with a double mesh cover to ensure that the turbulence block fits the blade surface and provides a flow around the blade. However, no solution for removing the component in the air is provided, and it is not applicable to blades with serrated edges.

[0003] (2) A vibration damping assembly is formed by a flexible cylinder, a base, and an elastic converging net. The flexible cylinder is bound to the blade surface by the elastic converging net to achieve a vortex shedding mechanism that disrupts the airflow. However, this solution is not suitable for serrated blades and cannot be disassembled in the air.

[0004] (3) An anti-vortex-induced vibration device is formed by an air bladder located on the suction surface of the blade, which is connected to the internal air pump and pressure vessel of the blade, to prevent vortex-induced vibration of the blade during hoisting and power outage shutdown. However, this solution is too complex and requires an additional power supply device.

[0005] (4) An anti-vortex device is formed by a protective block, a turbulence block, and a connecting strip. The connecting strip is used to fix the protective block and the turbulence block. However, this method is too complicated to install and is difficult to install and disassemble.

[0006] (5) An anti-vortex-induced vibration device is formed by a carrier component and a turbulence-inducing component. The carrier component is arranged around the reference axis, and the turbulence-inducing component is a flexible strip-shaped body connected to the carrier component and located on the side of the carrier component away from the accommodating space. The turbulence-inducing component suppresses the generation of periodic shedding vortices by interfering with or preventing the interaction between the airflow entrainment layers, thereby reducing the vortex-induced vibration phenomenon of the blades. However, the anti-vortex-induced vibration device is difficult to disassemble after launch. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to address the issue of vortex-induced vibration that easily occurs when existing wind turbine blades are stored in underground storage yards and before being connected to the grid in the air. The invention provides a method for disassembling and assembling a wind turbine blade anti-vibration kit that is compact in structure, easy to disassemble and assemble, has a wide range of applications, and is conducive to improving the anti-vibration effect of the blade.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A method for disassembling and assembling a wind turbine blade anti-vibration kit includes the following installation steps: Step S1: Wrap the blades from the trailing edge to the leading edge using a shock-absorbing mesh sleeve; Step S2: Secure the anti-vibration mesh in the blade tip area with a fixing rope, and the fixing rope passes through the anti-vibration mesh in the trailing edge area of ​​the blade. Step S3: Pass the main rope through the multiple air holes in the leading edge area of ​​the blade using a slip knot to lock the shockproof netting to the blade surface. Step S4: Use cable ties to secure the turbulence block to the anti-vibration mesh sleeves on the pressure and suction surfaces of the blades via the built-in connecting ears; Step S5: Use the harness tape to lock the leading edge protection block to the blade surface, and simultaneously lock the main rope with the slip knot fastened to the Velcro of the harness tape. Step S6: Arrange the wire harness and leading edge protection block at the maximum chord length of the blade, 1 / 3 of the distance from the blade root, and at the end of the shockproof mesh at the blade root. Step S7: Pass the fixing rope and main rope through the leaf root hole at the root of the blade, and then wrap the excess rope around the leaf root; this completes the installation of the anti-vibration kit.

[0009] As a further improvement of the present invention, in step S4, multiple turbulence blocks are locked onto the anti-vibration mesh sleeves on the pressure surface and suction surface of the blades in a staggered figure-eight shape.

[0010] As a further improvement of the present invention, in step S5, the Velcro of the harness tape has a felt side and a hook side; the main rope passes through the felt side and is pressed tightly against the hook side.

[0011] As a further improvement to the present invention, the following disassembly steps are also included: Step Y1: Adjust the blade orientation so that the leading edge of the blade faces upward and the trailing edge faces downward; Step Y2: Climb into the hub of the wind turbine, untangle the fixing rope and main rope wrapped around the blade root, and lower the excess rope to the ground through the blade root hole; Step Y3: First pull the main rope, open the harness, and also untie the shockproof mesh from the leading edge of the blade; Step Y4: After the anti-vibration mesh sleeve is untied from the leading edge area of ​​the blade, pull the fixing rope to completely detach the anti-vibration kit from the blade. Step Y5: Seal the leaf root holes tightly with sealant.

[0012] Compared with the prior art, the advantages of the present invention are as follows: The wind turbine blade anti-vibration kit assembly and disassembly method of this invention connects the anti-vibration mesh sleeve to the blade's rain cover via a main rope and a fixing rope. The anti-vibration mesh sleeve secures the turbulence block to the blade surface. Furthermore, the anti-vibration mesh sleeve is sewn together at the trailing edge of the blade using a slip knot and bound to the blade surface with a wiring harness. This achieves anti-vibration protection after the blade is in flight and facilitates removal of the anti-vibration kit on the ground. Simultaneously, a protective block is added to the leading edge area of ​​the blade to prevent damage to the leading edge paint and to increase the friction between the wiring harness and the blade surface, thus improving the anti-vibration effect. This invention has a simple structure, is easy to install, and has low cost. It effectively prevents vortex-induced vibration of blades during ground and aerial storage, and is an effective means of achieving blade anti-vibration, significantly improving the safety and reliability of the turbine unit. Attached Figure Description

[0013] Figure 1 This is a schematic diagram illustrating the installation process of the anti-vibration kit in a specific embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the disassembly process of the anti-vibration kit in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the assembly of the anti-vibration kit in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the installation of the main rope locking shockproof net sleeve in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the structural principle of the turbulence block in a specific embodiment of the present invention; wherein, Figure (a) is a cross-sectional view and Figure (b) is a perspective view; Figure 6 This is a schematic diagram of the installation of the wire harness tape and the leading edge protection block in a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the Velcro in a specific embodiment of the present invention.

[0014] Legend: 1. Blade; 2. Shockproof mesh; 3. Turbine block; 4. Fixing rope; 5. Main rope; 6. Locking rope; 7. Cable harness; 8. Leading edge protection block; 9. Blade root hole; 31. Connecting ear; 71. Felt surface; 72. Hook surface; 81. Ear plate. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0016] In the description of this invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more unless otherwise explicitly specified.

[0018] Example like Figure 1 As shown, the method for disassembling and assembling the wind turbine blade anti-vibration kit of the present invention includes the following installation steps: Step S1: Use the shockproof mesh 2 to wrap the blade 1 from the rear edge to the front edge.

[0019] Step S2: Use the fixing rope 4 to lock the shockproof netting 2 in the blade tip area, and the fixing rope 4 passes through the shockproof netting 2 in the trailing edge area of ​​the blade 1.

[0020] Step S3: Pass the main rope 5 through the multiple eyelets on the leading edge area of ​​blade 1 using a slip knot, and lock the shockproof mesh 2 to the surface of blade 1. The leading edge area of ​​the shockproof mesh 2 is connected with slip knots. During disassembly, pull the main rope 5 from the ground to completely open the shockproof mesh 2 on the leading edge area of ​​the blade, and then pull the fixing rope 4. Even if the trailing edge of blade 1 has serrations, the shockproof mesh 2 can be easily detached from the blade surface. The slip knots are used to lock and open the shockproof mesh 2, which solves the problems of installing and disassembling the serrated blade anti-vibration component after launch. It is understood that the specific form of the slip knot can refer to the conventional settings in fields such as woven bag sealing and clothing sewing, and will not be described in detail here.

[0021] Step S4: Use cable ties to secure the turbulence block 3 to the shock-absorbing mesh sleeve 2 on the pressure and suction surfaces of the blade 1 via its built-in connecting lugs 31. For example... Figure 4 and Figure 5As shown, multiple turbulence blocks 3 are locked onto the anti-vibration mesh sleeve 2 on the pressure and suction surfaces of the blade 1 in a staggered "V" shape. The staggered "V" arrangement of the turbulence blocks 3 disrupts the airflow over the surface of the blade 1, suppressing the periodic vortex shedding, thereby achieving the purpose of suppressing vortex-induced vibration of the blade 1.

[0022] Step S5, as follows Figure 6 As shown, the harness strap 7 is passed through the ear plate 81 to lock the leading edge protection block 8 onto the surface of the blade 1, and simultaneously the main rope 5, after the slipknot is locked, is locked onto the Velcro of the harness strap 7. Figure 7 As shown, the Velcro strap of the harness 7 has a felt surface 71 and a hook surface 72; the main rope 5 passes through the felt surface 71 and is pressed tightly against the hook surface 72. To achieve a slip knot in the air and to open the slip knot on the ground, the harness 7 with the felt surface 71 and hook surface 72 is used to hold down any excess slip knot. This prevents the harness 7 from shifting longitudinally during pulling, thus hindering the opening of the felt surface 71 and hook surface 72, and also protects the leading edge area of ​​the blade 1 from being scratched by the harness 7. Connecting the harness 7 to the leading edge protection block 8 also increases the friction between the harness 7 and the surface of the blade 1.

[0023] Step S6: Arrange the cable harness 7 and the leading edge protection block 8 at the maximum chord length of blade 1, one-third of the distance from the blade root, and at the end position of the shockproof mesh sleeve 2 at the blade root. Except for the end position of the shockproof mesh sleeve 2, the main rope 5 and the fixing rope 4 at the other two locations are directly connected to the cable harness 7 with cable ties. In this embodiment, to prevent the main rope 5 and the fixing rope 4 from hitting the blade 1 in the air, two additional sets of cable harness 7 are added at the blade root to tie the suspended main rope 5 and the fixing rope 4 to the surface of the blade 1.

[0024] Step S7: Pass the fixing rope 4 and the main rope 5 through the leaf root hole 9 at the root of the blade 1, and then wrap the excess rope around the leaf root. This completes the installation of the anti-vibration kit. Figure 3 As shown.

[0025] In this embodiment, the anti-vibration mesh 2 with the flow block 3 is installed on the surface of the blade 1. When the blade 1 is in the air, regardless of whether the trailing edge of the blade 1 has serrations, the anti-vibration kit can be successfully removed from the ground.

[0026] like Figure 2 As shown, the disassembly of the anti-vibration kit in this embodiment includes the following steps: Step Y1: Adjust blade 1 to form an angle of about 20° with the vertical direction, with the leading edge of blade 1 facing up and the trailing edge facing down.

[0027] Step Y2: The operator climbs into the hub of the wind turbine and lowers the main rope 5 and the fixing rope 4, which are tied to the blade root, through the blade root hole 9 of the rain cover to the ground. The ground personnel then pull the main rope 5 to untie the front edge of the anti-vibration net 2, and then pull the fixing rope 4 to remove the entire anti-vibration kit from the blade surface in the air.

[0028] Untie the fixing rope 4 and the main rope 5 wrapped around the root of leaf 1, and lower the excess rope to the ground through the hole on the root of the leaf.

[0029] Step Y3: First pull the main rope 5, open the wire harness 7, and also untie the shockproof net sleeve 2 from the leading edge of the blade 1; Step Y4: After the shock-absorbing mesh sleeve 2 is untied from the leading edge area of ​​the blade 1, pull the fixing rope 4 to completely detach the shock-absorbing kit from the blade 1. Step Y5: Seal the leaf root hole 9 tightly with sealant.

[0030] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for disassembling and assembling a wind turbine blade anti-vibration kit, characterized in that, The installation process includes the following steps: Step S1: Use the shockproof mesh (2) to wrap the blade (1) from the rear edge to the front edge; Step S2: Use the fixing rope (4) to lock the shockproof netting (2) in the blade tip area, and the fixing rope (4) passes through the shockproof netting (2) in the trailing edge area of ​​the blade (1). Step S3: Pass the main rope (5) through multiple air holes in the leading edge area of ​​the blade (1) using a slip knot, and lock the shockproof net (2) onto the blade surface. Step S4: Use cable ties to lock the turbulence block (3) to the shockproof mesh sleeve (2) on the pressure surface and suction surface of the blade (1) respectively through the connecting ear (31); Step S5: Use the harness tape (7) to lock the leading edge protection block (8) onto the surface of the blade (1), and simultaneously lock the main rope (5) with the slipknot fastener onto the Velcro of the harness tape (7); Step S6: Arrange the wire harness (7) and the leading edge protection block (8) at the maximum chord length of the blade (1), 1 / 3 of the distance from the blade root, and at the end position of the shockproof mesh (2) at the blade root. Step S7: Pass the fixing rope (4) and the main rope (5) through the leaf root hole (9) at the root of the blade (1), and then wrap the excess rope around the leaf root; thus, the installation of the anti-vibration kit is completed.

2. The method for disassembling and assembling the wind turbine blade anti-vibration kit according to claim 1, characterized in that, In step S4, multiple turbulence blocks (3) are locked onto the anti-vibration mesh (2) of the pressure surface and suction surface of the blade (1) in a staggered figure-eight shape.

3. The method for disassembling and assembling the wind turbine blade anti-vibration kit according to claim 1, characterized in that, In step S5, the Velcro of the harness (7) has a felt side (71) and a hook side (72); the main rope (5) passes through the felt side (71) and is pressed against the hook side (72).

4. The method for disassembling and assembling the wind turbine blade anti-vibration kit according to any one of claims 1 to 3, characterized in that, The following disassembly steps are also included: Step Y1: Adjust the posture of the blade (1) so that the leading edge of the blade (1) faces upward and the trailing edge faces downward; Step Y2: Climb into the hub of the wind turbine, untangle the fixing rope (4) and main rope (5) wrapped around the root of the blade (1), and lower the excess rope to the ground through the blade root hole (9); Step Y3: First pull the main rope (5), open the wire harness (7), and also untie the shockproof net sleeve (2) from the front edge of the blade (1); Step Y4: After the shock-absorbing mesh sleeve (2) is untied from the leading edge area of ​​the blade (1), pull the fixing rope (4) to completely detach the shock-absorbing kit from the blade (1); Step Y5: Seal the leaf root hole (9) tightly with sealant.

5. The method for disassembling and assembling the wind turbine blade anti-vibration kit according to claim 4, characterized in that, In step Y1, the blade (1) is adjusted to form an angle of 10° to 30° with the vertical direction.

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