Vortex-induced-resistant device of fan blade and mounting method of vortex-induced-resistant device

Abstract

The invention provides an anti-vortex-induced device of a fan blade and a mounting method, and relates to the technical field of wind power equipment. A plurality of second binding band assemblies are arranged, the second binding band assemblies are arranged in the target area at intervals in the extending direction of the fan blade, the target area is the area between the blade tip area and the blade root of the fan blade, and finally at least one first connecting piece is arranged; and all the first binding belt assemblies and all the second binding belt assemblies are connected through first connecting pieces, and one ends of the first connecting pieces are connected to the blade roots of the fan blades. According to the technical scheme, the multiple second binding band assemblies are additionally arranged, the multiple second binding band assemblies are connected through the first connecting pieces, equivalently, the first connecting pieces located in the target area are fixed to the fan blade through the second binding band assemblies, it can be avoided that when the fan blade runs, the first connecting pieces located in the target area collide with the fan blade, and the fan blade cannot be damaged. And abnormal sound is generated.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power equipment, and in particular to an anti-vortex excitation device for a wind turbine blade and an installation method thereof. Background Art

[0002] The blades of wind turbines will vibrate periodically at certain wind speeds due to fluid dynamics. This vibration is usually caused by the formation of vortices in the flowing air. When the frequency of vortex shedding is close to the natural frequency of the blades, resonance will occur, causing the blades to vibrate greatly. In order to suppress this vibration, anti-vortex devices are generally installed on the blades of wind turbine generators. The stability of the installation of the anti-vortex device directly affects the anti-vortex effect. In addition, it will also affect the stability of the blade operation. Therefore, it is urgent to design an installation method that can stably install the anti-vortex device. Summary of the invention

[0003] One object of the present invention is to provide a method for installing an anti-vortex excitation device for fan blades, so as to solve the technical problem in the prior art that the anti-vortex excitation device is unstable in installation, affecting the anti-vortex excitation effect and affecting the operating stability of the blades.

[0004] A further object of the present invention is to improve the anti-vortex effect.

[0005] Another object of the present invention is to provide an anti-vortex excitation device to improve the anti-vortex excitation effect.

[0006] In particular, the present invention provides a method for installing a fan blade anti-vortex excitation device, comprising the following steps:

[0007] Providing a plurality of first binding strap assemblies, and sequentially arranging the plurality of first binding strap assemblies in the tip region of the fan blade along the extension direction of the fan blade;

[0008] Arrange a plurality of first spoilers, and install the first spoiler on each of the first strap assemblies;

[0009] A plurality of second binding strap assemblies are provided, and the plurality of second binding strap assemblies are arranged at intervals in a target area along the extension direction of the fan blade, wherein the target area is an area between the blade tip area and the blade root of the fan blade;

[0010] At least one first connecting member is provided, and all the first binding strap assemblies and all the second binding strap assemblies are connected by the first connecting member, and one end of the first connecting member is connected to the blade root of the wind turbine blade.

[0011] Optionally, multiple first spoiler blocks are provided, and in the step of installing the first spoiler blocks on each first strap assembly, multiple first spoiler blocks are installed on each first strap assembly, and the multiple first spoiler blocks are respectively arranged at the leading edge and the trailing edge of the fan blade.

[0012] Optionally, a plurality of first binding strap assemblies are provided, and the plurality of first binding strap assemblies are sequentially arranged in the tip region of the fan blade along the extension direction of the fan blade, followed by the following steps:

[0013] Provide a plurality of connecting straps, and connect two adjacent first strap assemblies via at least one connecting strap;

[0014] A plurality of second spoiler blocks are provided, and at least one second spoiler block is installed on each of the connecting strips.

[0015] Optionally, a plurality of connecting straps are provided, and in the step of connecting two adjacent first strap assemblies through at least one connecting strap, two adjacent first strap assemblies are connected through a plurality of the connecting straps, at least one of the connecting straps is arranged at the leading edge of the fan blade, and at least one of the connecting straps is arranged at the trailing edge of the fan blade.

[0016] Optionally, after the step of providing a plurality of second binding strap assemblies and arranging the plurality of second binding strap assemblies at intervals in the target area along the extension direction of the wind turbine blade, the method further includes:

[0017] A second connecting member is provided and all the second binding strap assemblies are connected by the second connecting member, one end of the second connecting member is connected to the first binding strap assembly at the tail of the blade tip area, and the other end is connected to the blade root of the wind turbine blade.

[0018] Optionally, at least one first connecting member is provided, and all the first strap assemblies and all the second strap assemblies are connected by the first connecting member, and in the step of connecting one end of the first connecting member to the root of the wind turbine blade, one end of the first connecting member is connected to a rain shield ring at the root of the blade, a first anti-wear member is installed on the rain shield ring, and the position where the first connecting member passes through the first anti-wear member is covered with a second anti-wear member.

[0019] Optionally, the first strap assembly and the second strap assembly each include a front edge protection block, a rear edge protection block and at least one first strap, and the front edge protection block and the rear edge protection block are both mounted on the first strap.

[0020] In particular, the present invention further provides an anti-vortex device for a fan blade, which is applied according to the above-mentioned installation method and includes at least one inclined spoiler block group, each of which includes:

[0021] A first strap assembly, comprising at least one first strap and a leading edge protection block and a trailing edge protection block mounted on the first strap, wherein the first strap is sleeved on a fan blade, the leading edge protection block is located at a leading edge of the fan blade, and the trailing edge protection block is located at a trailing edge of the fan blade;

[0022] A plurality of first spoilers are mounted on the first binding strap, and the plurality of first spoilers are respectively arranged at the leading edge and the trailing edge of the fan blade, and extend out of the leading edge and the trailing edge of the fan blade correspondingly.

[0023] Optionally, all of the first spoilers are arranged obliquely toward the tip direction of the fan blade or are arranged obliquely toward the root direction of the fan blade.

[0024] Optionally, the inclination angle between the first spoiler and the fan blade is any value in the range of 10° to 80°.

[0025] The present invention arranges a plurality of first strap assemblies in the tip area of ​​the fan blade, installs a first spoiler on each first strap assembly, and then arranges a plurality of second strap assemblies, and arranges the plurality of second strap assemblies in the target area along the extension direction of the fan blade at intervals, the target area being the area between the tip area and the root of the fan blade, and finally arranges at least one first connector, connects all the first strap assemblies and all the second strap assemblies by the first connector, and connects one end of the first connector to the root of the fan blade. The above technical solution is equivalent to fixing the first connector located in the target area to the fan blade through the second strap assembly by adding a plurality of second strap assemblies and connecting the plurality of second strap assemblies by the first connector. On the one hand, it can prevent the first connector located in the target area from hitting the fan blade and generating abnormal noise when the fan blade is running; on the other hand, the first connector is fixed by the second strap assembly, and since the first connector connects the plurality of first strap assemblies, the stability of the connection of the first strap assembly can be improved, thereby improving the stability of the installation of the first spoiler and ensuring the anti-vortex excitation effect.

[0026] Furthermore, the present invention also provides a plurality of connecting straps, and connects two adjacent first strap assemblies through at least one connecting strap, and then provides a plurality of second spoilers, and installs at least one second spoiler on each connecting strap. The above technical solution can improve the stability of the installation of the first strap assembly by providing a plurality of connecting straps, and is also conducive to the installation of the second spoiler. The second spoiler causes the outer dimensions of the fan blade to be continuously disturbed, destroying the continuous energy injection along the blade span, thereby further improving the anti-vortex excitation effect.

[0027] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0029] Figure 1 is a schematic structural diagram of an anti-vortex excitation device according to an embodiment of the present invention installed at an angle on a fan blade;

[0030] Figure 2 yes Figure 1 A schematic enlarged view of part A;

[0031] Figure 3 is a schematic structural diagram of another angle in which an anti-vortex excitation device according to an embodiment of the present invention is installed on a fan blade;

[0032] Figure 4 is a schematic structural diagram of a first binding belt assembly according to an embodiment of the present invention;

[0033] Figure 5 is a schematic structural diagram of a first binding band according to an embodiment of the present invention;

[0034] Figure 6 is a schematic structural diagram of a trailing edge protection block according to an embodiment of the present invention;

[0035] Figure 7 is a schematic structural diagram of a leading edge protection block according to an embodiment of the present invention;

[0036] Figure 8 is a schematic structural diagram of a first spoiler block according to an embodiment of the present invention;

[0037] Fig. 9 is a schematic flow chart of a method for installing an anti-vortex excitation device for fan blades according to an embodiment of the present invention;

[0038] Fig.10 is a schematic flow chart of a method for installing an anti-vortex excitation device for fan blades according to another embodiment of the present invention;

[0039] Fig.11 It is a schematic flow chart of a method for installing an anti-vortex excitation device for fan blades according to yet another embodiment of the present invention.

[0040] Reference numerals:

[0041] 100-anti-vortex device, 200-fan blade, 10-first strap assembly, 20-first spoiler, 30-second strap assembly, 40-second connecting piece, 50-first connecting piece, 60-connecting strap, 70-second spoiler, 11-first strap, 12-trailing edge protection block, 13-leading edge protection block, 111-first rope threading hole, 121-first part, 122 second part, 123-second rope threading hole, 124-limiting groove, 131-third rope threading hole, 21-spoiler block body, 22-second strap. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0044] Unless otherwise clearly defined and limited, the terms "connection", "installation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person skilled in the art should be able to understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0045] Unless otherwise defined, all terms (including technical terms and scientific terms) used in the description of this embodiment have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0046] Figure 1 1 is a schematic structural diagram of an anti-vortex excitation device 100 installed at an angle on a fan blade 200 according to an embodiment of the present invention. Figure 2 yes Figure 1 A schematic enlarged view of part A in the figure. Figure 3 is a schematic structural diagram showing an anti-vortex excitation device 100 according to an embodiment of the present invention installed on a fan blade 200 from another angle. Figure 4 FIG. 1 is a schematic structural diagram of a first strap assembly 10 according to an embodiment of the present invention. Figures 1 to 4 As shown, in a specific embodiment, the anti-vortex excitation device 100 of the fan blade 200 includes at least one inclined spoiler block group, each inclined spoiler block group includes a first strap assembly 10 and a plurality of first spoiler blocks 20, the first strap assembly 10 includes at least one first strap 11 and a leading edge protection block 13 and a trailing edge protection block 12 mounted on the first strap 11, and the first strap 11 is sleeved on the fan blade 200. The leading edge protection block 13 is located at the leading edge of the fan blade 200. The trailing edge protection block 12 is located at the trailing edge of the fan blade 200. The plurality of first spoiler blocks 20 are mounted on the first strap 11, and the plurality of first spoiler blocks 20 are respectively arranged at the leading edge and the trailing edge of the fan blade 200, and extend out of the leading edge and the trailing edge of the fan blade 200 accordingly.

[0047] This embodiment provides a first spoiler block 20, and configures the first spoiler block 20 to extend out of the leading edge and the trailing edge of the fan blade 200, which can affect the width of the airflow spoiler in disguise, which is equivalent to changing the chord length of the fan blade 200, thereby changing the vortex shedding frequency of the cross section of the fan blade 200, affecting the injection of vortex vibration energy, and improving the anti-vortex excitation effect.

[0048] Furthermore, the first spoiler 20 being higher than the surface of the fan blade 200 will also improve the anti-vortex effect.

[0049] In some embodiments, there are multiple inclined spoiler groups, and the multiple inclined spoiler groups are arranged at intervals in the tip region of the fan blade 200 .

[0050] In some embodiments, the first spoiler 20 arranged at the leading edge of the fan blade 200 is located on the pressure side of the fan blade 200, and the first spoiler 20 arranged at the trailing edge of the fan blade 200 is located on the suction side of the fan blade 200. Alternatively, the first spoiler 20 arranged at the leading edge of the fan blade 200 is located on the suction side of the fan blade 200, and the first spoiler 20 arranged at the trailing edge of the fan blade 200 is located on the pressure side of the fan blade 200. The spiral arrangement of this embodiment can avoid the fan blade 200 from generating vortex excitation forces in the same phase and avoid vibration excitation.

[0051] Figure 5 FIG. 1 is a schematic structural diagram of a first binding band according to an embodiment of the present invention. Figure 5As shown, the first strap 11 is elastic and has a Velcro, and the first strap 11 can be fixed by the Velcro, so that the first strap 11 is sleeved on the fan blade 200. In addition, at least one first rope threading hole 111 is provided on the first strap 11. In this embodiment, the first strap 11 has three first rope threading holes 111. In another embodiment, the number of the first rope threading holes 111 can also be designed according to specific design requirements.

[0052] In some embodiments, the first binding strap assembly 10 includes two first binding straps 11. In other embodiments, the number of the first binding straps 11 can also be determined according to specific design requirements.

[0053] Figure 6 FIG. 1 is a schematic structural diagram of a trailing edge protection block 12 according to an embodiment of the present invention. Figure 6 As shown, in some embodiments, the trailing edge protection block 12 is T-shaped and includes a first portion 121 and a second portion 122, wherein the first portion 121 extends along the chord length direction of the wind turbine blade 200, and the second portion 122 is perpendicular to the first portion 121. At least one second rope threading hole 123 is respectively provided on the first portion 121 and the second portion 122, and the second rope threading hole 123 is used to thread the first binding strap 11. Here, the number of the second rope threading holes 123 can be determined according to the number of the first binding straps 11, and the more the number of the first binding straps 11, the more the number of the second rope threading holes 123. If the number of the first binding straps 11 is two, then two second rope threading holes 123 are also provided on the first portion 121, and the two second rope threading holes 123 are arranged side by side. The second rope threading hole 123 on the second portion 122 is aligned with the second rope threading hole 123 on the first portion 121.

[0054] In a preferred embodiment, in order to improve the installation stability of the rear edge protection block 12, the second part 122 is provided with at least one second rope threading hole 123 on both sides of the first part 121, and the first strap 11 first passes through the second rope threading hole 123 on one side of the second part 122, then passes through the second rope threading hole 123 on the first part 121, and finally passes through the second rope threading hole 123 on the other side of the second part 122, thereby installing the rear edge protection block 12 on the first strap 11.

[0055] In some embodiments, the second portion 122 of the trailing edge protection block 12 is further provided with a limiting groove 124, which is engaged with the trailing edge of the wind turbine blade 200, thereby completing the limiting of the trailing edge protection block 12 to prevent the trailing edge protection block 12 from moving.

[0056] In some embodiments, both the leading edge protection block 13 and the trailing edge protection block 12 are made of foam material.

[0057] Figure 7FIG. 1 is a schematic structural diagram of a leading edge protection block 13 according to an embodiment of the present invention. Figure 7 As shown, the front edge protection block 13 is plate-shaped. The front edge protection block 13 has at least one third rope threading hole 131, and the third rope threading hole 131 is used to thread the first binding strap 11. The number of the third rope threading holes 131 is consistent with the number of the second rope threading holes 123 on the second part 122 of the rear edge protection block 12.

[0058] Figure 8 FIG. 2 is a schematic structural diagram of a first spoiler block 20 according to an embodiment of the present invention. Figure 8 As shown, in some embodiments, the first spoiler 20 adopts a triangular prism structure, a rectangular parallelepiped structure or a cylindrical structure, and the first spoiler 20 includes a spoiler body 21 and at least one second strap 22, and the second strap 22 is connected to the spoiler body 21. The second strap 22 has Velcro, which is used to install the entire first spoiler 20 to the first strap 11 of the first strap assembly 10. In this embodiment, the first spoiler 20 has three second straps 22, and the three second straps 22 are arranged at intervals along the extension direction of the spoiler body 21. In other embodiments, the number of the second straps 22 can be set according to the extension length of the spoiler body 21. The longer the length of the spoiler body 21, the more the number of the second straps 22, so as to improve the stability of the connection of the spoiler body 21.

[0059] In some embodiments, all first spoilers 20 are arranged obliquely toward the tip of the fan blade 200 or toward the root of the fan blade 200. In other embodiments, the first spoiler 20 may also be arranged perpendicular to the fan blade 200, which may be selected according to design requirements.

[0060] In this embodiment, the first spoiler 20 is arranged obliquely to facilitate removal, thereby saving the disassembly time of the anti-vortex excitation device 100.

[0061] In some embodiments, the inclination angle between the first spoiler 20 and the fan blade 200 is any value in the range of 10° to 80°, for example, 10°, 20°, 30°, 40°, 50°, 60°, 70° or 80°.

[0062] In some embodiments, the anti-vortex device 100 also includes at least one first connecting member 50, which is used to connect the first strap assemblies 10 of all inclined spoiler block groups. One end of the first connecting member 50 is connected to the root of the fan blade 200, thereby fixing all inclined spoiler block groups.

[0063] In some embodiments, the first connecting member 50 is a rope, and the rope can pass through the first rope threading hole 111 on the first strap 11 of the first strap assembly 10, so as to connect multiple first strap assemblies 10 in series.

[0064] See also Figure 1 In some embodiments, the anti-vortex excitation device 100 further includes a plurality of second binding strap assemblies 30, which are arranged at intervals in a target area along the extension direction of the fan blade 200, and the target area is an area between the blade tip area and the blade root of the fan blade 200. The first connecting member 50 is also used to connect the plurality of second binding strap assemblies 30, so as to fix the plurality of first binding strap assemblies 10 and the plurality of second binding strap assemblies 30 together at the blade root of the fan blade 200.

[0065] In this embodiment, a plurality of second strap assemblies 30 are additionally provided between the blade tip area and the blade root. The number of the second strap assemblies 30 can be determined according to the length of the wind turbine blade 200, and can play a role in suppressing excessive disturbance of the first connecting member 50 in the air.

[0066] In some embodiments, the structure of the second strap assembly 30 is consistent with that of the first strap assembly 10. That is, both the first strap assembly 10 and the second strap assembly 30 include a leading edge protection block 13, a trailing edge protection block 12 and at least one first strap 11, and both the leading edge protection block 13 and the trailing edge protection block 12 are mounted on the first strap 11. The first connector 50 first connects the plurality of first strap assemblies 10 in sequence, and then the first connector 50 connects the first rope threading holes 111 on the first strap 11 of the second strap assembly 30 in sequence, thereby connecting the plurality of first strap assemblies 10 and the plurality of second strap assemblies 30 in series. Here, the end of the first connector 50 is connected to the first strap 11 of the first first strap assembly 10 located in the blade tip area. The tail of the first connector 50 is connected to the blade root of the wind turbine blade 200, thereby fixing the plurality of first strap assemblies 10 and the plurality of second strap assemblies 30.

[0067] In some embodiments, one end of the first connector 50 is connected to the rain shield ring of the blade root, a first anti-wear member is installed on the rain shield ring, and a second anti-wear member is covered at the position where the first connector 50 passes through the first anti-wear member. Here, the first anti-wear member can be an eyelet, and the second anti-wear member can be an anti-wear tape. Wrapping the second anti-wear tape on the first connector 50 located at the rain shield ring can play a protective role and prevent the first connector 50 from breaking after wear, causing the entire anti-vortex device 100 to fail.

[0068] In some embodiments, the anti-vortex excitation device 100 further includes a plurality of connecting straps 60 , and the connecting straps 60 are used to connect two adjacent first binding strap assemblies 10 , thereby improving the installation stability of the first binding strap assemblies 10 .

[0069] In some embodiments, the anti-vortex excitation device 100 further includes a plurality of second spoiler blocks 70 , and at least one second spoiler block 70 is installed on each connecting strip 60 .

[0070] In a preferred embodiment, the second spoiler block 70 is arranged along the extension direction of the fan blade 200. In other embodiments, the installation direction of the second spoiler block 70 can also be determined according to specific design requirements.

[0071] This embodiment provides a plurality of connecting straps 60, which can improve the stability of the installation of the first binding strap assembly 10 on the one hand, and facilitate the installation of the second spoiler block 70 on the other hand. The second spoiler block 70 causes the outer dimensions of the wind turbine blade 200 to be continuously disturbed, thereby destroying the continuous energy injection along the span of the blade, thereby further improving the anti-vortex excitation effect.

[0072] In a preferred embodiment, two adjacent first binding band assemblies 10 are connected by at least two connecting bands 60, at least one connecting band 60 is arranged at the leading edge of the fan blade 200, and at least one connecting band 60 is arranged at the trailing edge of the fan blade 200. At least one second spoiler 70 is installed on each connecting band 60. The second spoiler 70 arranged at the leading edge of the fan blade 200 and the second spoiler 70 arranged at the trailing edge of the fan blade 200 are located on the suction side and the pressure side of the fan blade 200, respectively.

[0073] In some embodiments, the connecting belt 60 may be an elastic binding belt, and the connecting belt 60 is arranged along the extension direction of the fan blade 200. In some embodiments, between two adjacent first binding belt assemblies 10, the same number of second spoiler blocks 70 are arranged at the leading edge and the trailing edge of the fan blade 200. For example, two second spoiler blocks 70 are arranged at the leading edge of the fan blade 200, and then two second spoiler blocks 70 are arranged at the trailing edge of the fan blade 200. The second spoiler block 70 has the same structure as the first spoiler block 20, but the arrangement direction is different. The first spoiler block 20 is arranged obliquely, while the second spoiler block 70 is arranged along the extension direction of the fan blade 200. In other embodiments, the arrangement direction of the second spoiler block 70 and the first spoiler block 20 can also be set to be the same, which is specifically determined according to design requirements.

[0074] In a preferred embodiment, the second spoiler block 70 arranged at the leading edge of the fan blade 200 in phase is located on the pressure side of the fan blade 200, and the second spoiler block 70 arranged at the trailing edge of the fan blade 200 is located on the suction side of the fan blade 200. Alternatively, the second spoiler block 70 arranged at the leading edge of the fan blade 200 in phase is located on the suction side of the fan blade 200, and the second spoiler block 70 arranged at the trailing edge of the fan blade 200 is located on the pressure side of the fan blade 200. This embodiment not only adopts a spiral arrangement for the first spoiler block 20, but also adopts a spiral arrangement for the second spoiler block 70, which can avoid the fan blade 200 from generating vortex excitation forces in phase and avoid vibration excitation.

[0075] In this embodiment, the first spoiler block 20 and the second spoiler block 70 are both installed on the fan blade 200. By changing the chord length of the fan blade 200, the vortex shedding frequency of the cross section of the fan blade 200 can be changed, thereby affecting the injection of vortex vibration energy and improving the anti-vortex excitation effect.

[0076] In some embodiments, the anti-vortex excitation device 100 further includes a second connector 40, which connects all the second strap assemblies 30, one end of which is connected to the first strap assembly 10 at the tail of the blade tip region, and the other end is connected to the blade root of the fan blade 200. The second connector 40 is connected to the last first strap assembly 10 in the blade tip region, that is, the end position of the first strap assembly 10 in the blade tip region, which can play a role in preventing falling.

[0077] In some embodiments, the second connecting member 40 is also a rope, which plays a fixing role. One end of the second connecting member 40 is connected to the rain shield ring at the root of the blade, and the first anti-wear member is installed on the rain shield ring. The position where the second connecting member 40 passes through the first anti-wear member is covered with the second anti-wear member. The first connecting member 50 can be regarded as a main rope, and the second connecting member 40 can be regarded as a fixing rope. The second connecting member 40 is connected to the last first strap assembly 10 in the blade tip area, that is, the end position of the first strap assembly 10 in the blade tip area, which can play a role in preventing falling. The main rope runs through each strap assembly and is used to disassemble the entire anti-vortex device 100.

[0078] Fig. 9 FIG. 1 is a schematic flow chart of a method for installing an anti-vortex excitation device 100 for a fan blade 200 according to an embodiment of the present invention. Fig. 9 As shown, in a specific embodiment, the installation method of the anti-vortex device 100 of the fan blade 200 includes the following steps:

[0079] Step S100, providing a plurality of first binding strap assemblies 10, and sequentially arranging the plurality of first binding strap assemblies 10 in the tip region of the fan blade 200 along the extension direction of the fan blade 200;

[0080] Step S200, providing a plurality of first spoiler blocks 20, and installing the first spoiler block 20 on each first strap assembly 10;

[0081] Step S300, providing a plurality of second binding strap assemblies 30, and arranging the plurality of second binding strap assemblies 30 at intervals in a target area along the extension direction of the wind turbine blade 200, wherein the target area is an area between a blade tip area and a blade root of the wind turbine blade 200;

[0082] Step S400 , providing at least one first connecting member 50 , connecting all first binding strap assemblies 10 and all second binding strap assemblies 30 using the first connecting member 50 , and connecting one end of the first connecting member 50 to the blade root of the wind turbine blade 200 .

[0083] This embodiment adds multiple second strap assemblies 30 and uses the first connecting member 50 to connect the multiple second strap assemblies 30, which is equivalent to fixing the first connecting member 50 located in the target area on the fan blade 200 through the second strap assembly 30. On the one hand, it can prevent the first connecting member 50 in the target area from colliding with the fan blade 200 and generating abnormal noise when the fan blade 200 is running; on the other hand, the first connecting member 50 is fixed by the second strap assembly 30. Since the first connecting member 50 connects multiple first strap assemblies 10, the stability of the connection of the first strap assembly 10 can be improved, thereby improving the stability of the installation of the first spoiler 20 and ensuring the anti-vortex excitation effect.

[0084] In step S100, after a plurality of first binding strap assemblies 10 are set, the plurality of first binding strap assemblies 10 are numbered, and then arranged in sequence in the blade tip region of the wind turbine blade 200 according to the numbers of the plurality of first binding strap assemblies 10. Here, because the chord length of the blade tip region is variable, and the first binding strap assemblies 10 are wound around the blade, the length of the corresponding first binding strap assemblies 10 can be set according to the chord length of the blade tip region, and then the first binding strap assemblies 10 of different lengths are numbered and arranged in sequence in the corresponding positions of the blade tip region according to the numbers, so that the first binding strap assemblies 10 of appropriate lengths can be installed at different positions of the blade tip region, thereby improving the stability of the installation of the first binding strap assemblies 10.

[0085] In some embodiments, the first strap assembly 10 includes a leading edge protection block 13, a trailing edge protection block 12, and at least one first strap 11, and the leading edge protection block 13 and the trailing edge protection block 12 are both mounted on the first strap 11. The leading edge protection block 13 is mounted on the leading edge of the wind blade 200, and the trailing edge protection block 12 is mounted on the trailing edge of the wind blade 200.

[0086] In step S200, a plurality of first spoiler blocks 20 are installed on each first strap assembly 10, and the plurality of first spoiler blocks 20 are respectively arranged at the leading edge and the trailing edge of the fan blade 200. The first spoiler block 20 is installed on the first strap 11 of the first strap assembly 10 through its own strap. The first spoiler blocks 20 are respectively installed at the leading edge and the trailing edge of the fan blade 200, and the first spoiler blocks 20 extend out of the leading edge and the trailing edge of the fan blade 200 accordingly. In a preferred embodiment, the plurality of first spoiler blocks 20 are respectively arranged obliquely at the leading edge and the trailing edge of the fan blade 200. That is, the angle between the first spoiler block 20 and the fan blade 200 is an acute angle. In other embodiments, the first spoiler block 20 may also be arranged perpendicular to the fan blade 200, or may be arranged parallel to the fan blade 200, which is specifically determined according to design requirements.

[0087] In a preferred embodiment, a plurality of first spoilers 20 are evenly arranged on the leading edge and the trailing edge of the fan blade 200 .

[0088] In some embodiments, two first spoilers 20 are installed on each first strap assembly 10, wherein one first spoiler 20 is installed obliquely at the leading edge of the fan blade 200 and extends out of the fan blade 200, and the other first spoiler 20 is installed obliquely at the trailing edge of the fan blade 200 and extends out of the fan blade 200. Preferably, the first spoilers 20 at the leading edge and the trailing edge of the fan blade 200 are symmetrically arranged along the longitudinal axis of the fan blade 200, and have the same angle with the fan blade 200.

[0089] In some embodiments, the inclination angle between the first spoiler 20 and the fan blade 200 is any value in the range of 10° to 80°. For example, it can be 10°, 20°, 30°, 40°, 50°, 60°, 70° or 80°. The first spoiler 20 located at the leading edge of the fan blade 200 and the first spoiler 20 located at the trailing edge of the fan blade 200 have the same inclination direction, that is, they are both inclined toward the tip direction of the fan blade 200 or toward the root direction of the fan blade 200.

[0090] In step S300, when installing the second strap assembly 30, the length of the corresponding second strap assembly 30 can be set according to the chord length of the target area, and then the second strap assemblies 30 of different lengths are numbered and arranged in sequence at the corresponding positions of the target area according to the numbers, and the second strap assemblies 30 of appropriate lengths can be installed at different positions of the target area to improve the installation stability of the second strap assembly 30. The first spoiler 20 needs to be installed on the first strap assembly 10, and the spoiler does not need to be installed on the second strap assembly 30, and its purpose is to fix the first connector 50.

[0091] In this embodiment, a plurality of second strap assemblies 30 are additionally provided between the blade tip area and the blade root. The number of the second strap assemblies 30 can be determined according to the length of the wind turbine blade 200, and can play a role in suppressing excessive disturbance of the first connecting member 50 in the air.

[0092] In step S400, the first connecting member 50 is a rope, which can pass through the first rope threading hole 111 on the first strap 11 of the first strap assembly 10, thereby connecting multiple first strap assemblies 10 in series. Then the rope passes through the first rope threading hole 111 on the first strap 11 of the second strap assembly 30 in sequence, thereby connecting multiple first strap assemblies 10 and multiple second strap assemblies 30 in series. Here, the end of the first connecting member 50 is connected to the first strap 11 of the first first strap assembly 10 located in the blade tip area. The tail of the first connecting member 50 is connected to the blade root of the wind turbine blade 200, thereby fixing multiple first strap assemblies 10 and multiple second strap assemblies 30.

[0093] In step S400, one end of the first connector 50 is connected to the rain shield ring of the blade root, the rain shield ring is installed with a first anti-wear member, and the position where the first connector 50 passes through the first anti-wear member is covered with a second anti-wear member. Here, the first anti-wear member can be an eyelet, and the second anti-wear member can be an anti-wear tape. Wrapping the anti-wear tape on the first connector 50 located at the rain shield ring can play a protective role and prevent the first connector 50 from breaking after wear, causing the entire anti-vortex device 100 to fail.

[0094] In a preferred embodiment, on the same first strap assembly 10, the first spoiler 20 arranged at the leading edge of the fan blade 200 is located on the pressure side of the fan blade 200, and the first spoiler 20 arranged at the trailing edge of the fan blade 200 is located on the suction side of the fan blade 200. Alternatively, on the same first strap assembly 10, the first spoiler 20 arranged at the leading edge of the fan blade 200 is located on the suction side of the fan blade 200, and the first spoiler 20 arranged at the trailing edge of the fan blade 200 is located on the pressure side of the fan blade 200. The spiral arrangement adopted in this embodiment can avoid the fan blade 200 from generating vortex excitation forces in the same phase and avoid vibration excitation. Here, the first spoiler 20 on the same first strap assembly 10 is located in the same phase.

[0095] Fig.10 FIG. 1 is a schematic flow chart of a method for installing an anti-vortex excitation device 100 for a fan blade 200 according to another embodiment of the present invention. Fig.10 As shown, after step S100, the following steps are also included:

[0096] Step S500, providing a plurality of connecting straps 60, and connecting two adjacent first binding strap assemblies 10 via at least one connecting strap 60;

[0097] Step S600, multiple second spoiler blocks 70 are provided, and at least one second spoiler block 70 is installed on each connecting strip 60. Here, it should be noted that there is no order relationship between step S500 and step S200, that is, the connecting strip 60 can be installed first, or the first spoiler block 20 can be installed first.

[0098] This embodiment provides a plurality of connecting straps 60, which can improve the stability of the installation of the first binding strap assembly 10 on the one hand, and facilitate the installation of the second spoiler block 70 on the other hand. The second spoiler block 70 causes the outer dimensions of the wind turbine blade 200 to be continuously disturbed, thereby destroying the continuous energy injection along the span of the blade, thereby further improving the anti-vortex excitation effect.

[0099] In a preferred embodiment, the second spoiler 70 is arranged along the extension direction of the fan blade 200 .

[0100] Fig.11 FIG. 1 is a schematic flow chart of a method for installing an anti-vortex excitation device 100 for a fan blade 200 according to another embodiment of the present invention. Fig.11 As shown, after step S300, the following steps are also included:

[0101] In step S700, the second connector 40 is provided, and all the second strap assemblies 30 are connected by the second connector 40, one end of the second connector 40 is connected to the first strap assembly 10 at the tail of the blade tip region, and the other end is connected to the blade root of the wind turbine blade 200. It should be noted that step S700 has no order relationship with step S400, and the first connector 50 can be installed first, or the second connector 40 can be installed first.

[0102] After the wind turbine blade 200 is hoisted, the above installation method can ensure the reliability of the long-term fixation of the entire anti-vortex device 100 on the wind turbine blade 200, and can ensure the integrity of the anti-vortex device 100 in extreme outdoor harsh environments, so that it will not be blown off or scraped away. The above installation method can be used in multiple scenarios such as storage, transportation, and hoisting of wind turbine blades 200 before grid connection.

[0103] When disassembling the anti-vortex device 100, the fan blade 200 to be disassembled is turned to the specified disassembly position, and the serrated trailing edge blade needs to adjust the serrations to the specified disassembly angle. A person is required to loosen the first connector 50 and the second connector 40 from the rainproof ring in turn, and release the first connector 50 and the second connector 40 respectively. The first connector 50 will fall to the ground, and the ground personnel stand according to the detachable angle requirements, pull the first connector 50 on the ground, apply external force to pull, and drive the Velcro of each first strap 11 to separate, so that the first strap assembly 10 and the second strap assembly 30 are separated from the fan blade 200, and then the entire anti-vortex device 100 can be disassembled by only applying force to the first connector 50, and the disassembly is relatively convenient.

[0104] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A method for installing a fan blade anti-vortex device, characterized in that: The following steps are involved: Providing a plurality of first binding strap assemblies, and sequentially arranging the plurality of first binding strap assemblies in the tip region of the fan blade along the extension direction of the fan blade; Arrange a plurality of first spoilers, and install the first spoiler on each of the first strap assemblies; A plurality of second binding strap assemblies are provided, and the plurality of second binding strap assemblies are arranged at intervals in a target area along the extension direction of the fan blade, wherein the target area is an area between the blade tip area and the blade root of the fan blade; At least one first connecting member is provided, and all the first binding strap assemblies and all the second binding strap assemblies are connected by the first connecting member, and one end of the first connecting member is connected to the blade root of the wind turbine blade.

2. The installation method according to claim 1, characterized in that: In the step of providing a plurality of first spoilers and installing the first spoilers on each of the first strap assemblies, a plurality of the first spoilers are installed on each of the first strap assemblies, and the plurality of first spoilers are respectively arranged at the leading edge and the trailing edge of the fan blade.

3. The installation method according to claim 1, characterized in that: The step of providing a plurality of first binding strap assemblies, and sequentially arranging the plurality of first binding strap assemblies in the tip region of the fan blade along the extension direction of the fan blade, further comprising the following steps: Provide a plurality of connecting straps, and connect two adjacent first strap assemblies via at least one connecting strap; A plurality of second spoiler blocks are provided, and at least one second spoiler block is installed on each of the connecting strips.

4. The installation method according to claim 3, characterized in that: In the step of setting a plurality of connecting straps and connecting two adjacent first strap assemblies through at least one connecting strap, two adjacent first strap assemblies are connected through a plurality of the connecting straps, at least one of the connecting straps is arranged at the leading edge of the fan blade, and at least one of the connecting straps is arranged at the trailing edge of the fan blade.

5. The installation method according to claim 1, characterized in that: The step of providing a plurality of second binding strap assemblies and arranging the plurality of second binding strap assemblies at intervals in the target area along the extension direction of the fan blades further includes: A second connecting member is provided and all the second binding strap assemblies are connected by the second connecting member, one end of the second connecting member is connected to the first binding strap assembly at the tail of the blade tip area, and the other end is connected to the blade root of the wind turbine blade.

6. The installation method according to claim 1, characterized in that: At least one first connecting member is provided, all the first strap assemblies and all the second strap assemblies are connected by the first connecting member, and one end of the first connecting member is connected to the root of the wind turbine blade. In the step, one end of the first connecting member is connected to a rain shield ring at the root of the blade, a first anti-wear member is installed on the rain shield ring, and the position where the first connecting member passes through the first anti-wear member is covered with a second anti-wear member.

7. The installation method according to claim 5, characterized in that: The first strap assembly and the second strap assembly each include a front edge protection block, a rear edge protection block and at least one first strap, and the front edge protection block and the rear edge protection block are both mounted on the first strap.

8. An anti-vortex device for a fan blade, using the installation method according to any one of claims 1 to 7, characterized in that: It comprises at least one inclined spoiler block group, each of which comprises: A first strap assembly, comprising at least one first strap and a leading edge protection block and a trailing edge protection block mounted on the first strap, wherein the first strap is sleeved on a fan blade, the leading edge protection block is located at a leading edge of the fan blade, and the trailing edge protection block is located at a trailing edge of the fan blade; A plurality of first spoilers are mounted on the first binding strap, and the plurality of first spoilers are respectively arranged at the leading edge and the trailing edge of the fan blade, and extend out of the leading edge and the trailing edge of the fan blade correspondingly.

9. The anti-vortex excitation device according to claim 8, characterized in that: All of the first spoilers are arranged obliquely toward the tip direction of the fan blade or are arranged obliquely toward the root direction of the fan blade.

10. The anti-vortex excitation device according to claim 8, characterized in that: The inclination angle between the first spoiler and the fan blade is any value in the range of 10° to 80°.

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