Vibration suppression device, blade, wind turbine generator set and vibration suppression method

Abstract

The embodiments of the present application provide a vibration suppression device, a blade, a wind turbine generator set, and a vibration suppression method. The vibration suppression method for the blade includes: stopping the blade at a preset position; setting an annular member on the blade body, the annular member including a main body portion, the main body portion being arranged around the blade body, and a buffer member being arranged on the side of the main body portion facing away from the surface of the blade body to reduce the eddy current energy attached to the blade surface. In the vibration suppression method for the blade provided in the embodiments of the present application, an annular member is arranged on the blade body, and a buffer member is arranged on the annular member, and the annular member is used to be sleeved on the outside of the blade body. The buffer member is arranged on the main body portion, and the multiple buffer members are distributed at intervals to destroy the aerodynamic shape of the blade, reduce the eddy current energy attached to the blade surface, further reduce the flutter phenomenon of the blade, and increase the service life of the blade.

Description

Technical Field

[0001] The present application relates to the technical field of wind power equipment, and in particular to a vibration suppression device, a blade, a wind turbine generator set, and a vibration suppression method. Background Art

[0002] With the continuous development of technology, people have higher requirements for the safety and lifespan of wind turbines. Whether it is a wind turbine on a seamount or onshore, after the blades are hoisted to the tower, due to the uneven chord length of the blades from root to tip and the twist angles in each cross section of the blades, when the wind turbine is shut down, the blades will experience flutter under the action of wind. Flutter can cause blade fatigue damage, seriously shortening the blade lifespan. Summary of the Invention

[0003] The embodiments of the present application provide a vibration suppression device, a blade, a wind turbine generator set, and a vibration suppression method, which are intended to suppress the flutter problem of the blades under the action of wind when the wind turbine generator set is shut down.

[0004] An embodiment of a first aspect of the present application provides a blade vibration suppression method, wherein the blade includes a blade body, and the method includes:

[0005] Make the blade stop at a preset position;

[0006] The annular member is arranged on the blade body. The annular member includes a main body portion, which is arranged around the blade body. A buffer member is arranged on the side of the main body portion away from the surface of the blade body to reduce the eddy current energy attached to the blade surface.

[0007] According to an embodiment of the first aspect of the present application, in the step of arranging the annular member on the blade body: a plurality of annular members are arranged at intervals in the vibration suppression area along the length direction of the blade body.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, in the step of arranging the annular member on the blade body: a plurality of the annular members are arranged on the blade body at intervals along the length direction of the blade, and a bridging member is connected between two adjacent annular members.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the blade body includes a maximum chord length position, and the chord length of the maximum chord length position is greater than the chord length of other parts of the blade body;

[0010] In the step of arranging the annular member on the blade body:

[0011] One of the rings is arranged on the side with the maximum chord length in the length direction;

[0012] Disposing another annular member on the other side of the position with the maximum chord length in the longitudinal direction;

[0013] A bridge member is used to connect two adjacent annular members located on both sides of the maximum chord length in the length direction.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the main body has a first end and a second end that are detachably connected to each other. In the step of arranging the annular member on the blade body:

[0015] The annular member is disposed around the blade body so that the first end and the second end are adjacent to each other, and the annular member is disposed on the blade body by connecting the first end and the second end using a connecting portion.

[0016] An embodiment of the second aspect of the present application provides a vibration suppression device for suppressing the flutter of the blades of a wind turbine generator set. The vibration suppression device includes: an annular member having a main body and a hollow space formed by the main body for accommodating part of the blades; a buffer member arranged on the side of the main body away from the hollow space, and multiple buffer members are distributed at intervals on the annular member.

[0017] According to the implementation of the second aspect of the present application, the main body has a first end and a second end that are detachably connected to each other; the vibration suppression device also includes a connecting portion, which is used to connect the first end and the second end to form a ring-shaped main body.

[0018] According to any of the aforementioned embodiments of the second aspect of the present application, the number of the annular members is more than two, and the more than two annular members are used to be distributed side by side on the blade along the length direction of the blade.

[0019] According to any of the aforementioned embodiments of the second aspect of the present application, it also includes: a bridging member for connecting two adjacent annular members in the length direction of the blade.

[0020] According to any of the aforementioned embodiments of the second aspect of the present application, there are more than two bridging members, and the more than two bridging members are used to be spaced apart and distributed along the chord direction of the blade.

[0021] According to any of the aforementioned embodiments of the second aspect of the present application, a plurality of buffer members are distributed in rows and columns on the surface of the annular member, and the distance between two adjacent rows and / or two adjacent columns of buffer members is 15 cm to 25 cm.

[0022] An embodiment of the third aspect of the present application further provides a blade, comprising: a blade body having a vibration suppression area; a vibration suppression device according to any of the above-mentioned second aspect embodiments, wherein the annular member of the vibration suppression device is arranged around the blade body in the vibration suppression area.

[0023] According to the implementation of the third aspect of the present application, the blade body includes blades and blade roots spaced apart along its length direction, the vibration suppression area is arranged close to the blade tip, and the extension dimension of the vibration suppression area in the blade length direction is 1 / 3 to 1 / 2 of the blade length.

[0024] According to any of the aforementioned embodiments of the third aspect of the present application, the annular member is bonded to the surface of the blade body;

[0025] Alternatively, the vibration suppression device further includes a clamping member, the main body portion has a first end and a second end detachably connected to each other, the first end and the second end being connected to each other via the clamping member so that the main body portion surrounds the blade body;

[0026] Alternatively, a fixing portion is protruding from the surface of the blade body, and the annular member is fixedly connected to the blade body via the fixing portion.

[0027] According to any of the aforementioned embodiments of the third aspect of the present application, the number of the annular members is more than two, and the more than two annular members are arranged side by side along the length direction of the blade body.

[0028] According to any of the aforementioned embodiments of the third aspect of the present application, the blade body has a maximum chord length position, the chord length of the maximum chord length position is greater than the chord length of other parts of the blade body, at least two annular members are spaced apart on both sides of the maximum chord length position, and the annular members located on both sides of the maximum chord length position are connected to each other by a bridging member extending along the length direction.

[0029] An embodiment of the fourth aspect of the present application further provides a wind turbine generator set, comprising blades of any of the above-mentioned embodiments of the third aspect.

[0030] In the blade vibration suppression method provided in the embodiments of this application, an annular member is provided on the blade body, and a buffer member is provided on the annular member. The annular member is designed to be mounted on the exterior of the blade body. The buffer members are provided on the body portion, and the multiple buffer members are spaced apart to disrupt the aerodynamic shape of the blade, reducing the eddy current energy attached to the blade surface, further reducing blade flutter and extending the blade's service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features.

[0032] Figure 1 This is a flow chart of a blade vibration suppression method provided in an embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of the usage status of a blade vibration suppression method provided in an embodiment of the present application.

[0034] Figure 3 This is a flow chart of a blade vibration suppression method provided in another embodiment of the present application.

[0035] Figure 4This is a schematic diagram of the state structure of a ring member in a blade vibration suppression method provided in an embodiment of the present application;

[0036] Figure 5 This is a structural diagram of a wind turbine generator set provided in an embodiment of the present application;

[0037] Figure 6 This is a schematic diagram of the structure of a blade provided in an embodiment of the present application.

[0038] Figure 7 This is a partially enlarged three-dimensional structural schematic diagram of a blade provided in an embodiment of the present application.

[0039] Figure 8 1 is a schematic structural diagram of a vibration suppression device provided in an embodiment of the present application;

[0040] Figure 9 is a structural schematic diagram of a vibration suppression device provided in another embodiment of the present application in another state;

[0041] Figure 10 is a structural schematic diagram of a vibration suppression device provided in another embodiment of the present application;

[0042] Figure 11 This is a schematic structural diagram of a vibration suppression device in use according to an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 100. Vibration suppression device;

[0045] 110, annular member; 111, main body; 111a, first end; 111b, second end; 112, hollow space;

[0046] 120, buffer parts;

[0047] 130, bridging piece;

[0048] 200, leaves;

[0049] 210, blade body; 211, vibration suppression area; 212, blade root; 213, blade tip; 214, maximum chord length position;

[0050] 300, tower;

[0051] 400. Cabin. DETAILED DESCRIPTION

[0052] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are set forth in order to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessary ambiguity in the present application; and, for clarity, the sizes of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0053] In the description of this application, it should be noted that, unless otherwise specified, "plurality" means more than two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are merely for the purpose of facilitating the description of this application and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0055] With the continuous development of wind turbines, wind turbines can be installed both at sea and on land. Whether it is a wind turbine at sea or on land, the problem of blade flutter is very likely to occur after the blades of the wind turbine are installed and before they are used. When the blades are in a flutter pile for a long time, the blades are prone to fatigue damage, which seriously affects the service life of the blades. In addition, since the blades are distributed with unequal chord lengths from the root to the tip, and there is a torsion angle in each section, when the angle between the aerodynamic and chord lengths on the blade surface is large, the frequency of the vortex shedding at the leading and trailing edges of each section is different, resulting in a wide spectrum of the overall vortex shedding of the blade, which is very easy to resonate with the natural frequency of the blade body.

[0056] The inventors discovered that blade flutter can be reduced or alleviated by attaching external vibration dampers to the blade surface. For example, net bags or irregular blocks can be attached to the blade surface to disrupt the blade's original aerodynamic shape, thereby suppressing blade flutter.

[0057] In order to better understand this application, Figures 1 to 9 The vibration suppression device, blade, wind turbine generator set and blade vibration suppression method of the embodiments of the present application are described in detail.

[0058] See also Figure 1 and Figure 2 , Figure 1 1 is a flow chart of a vibration suppression method for a blade 200 provided in an embodiment of the present application. Figure 2 FIG2 is a schematic diagram of a method for suppressing vibration of a blade 200 provided in an embodiment of the present application. The blade 200 is used in a wind turbine generator set.

[0059] like Figure 1 and Figure 2 As shown, the blade 200 includes a blade body 210. The vibration suppression method of the blade 200 includes:

[0060] Step S01: Stop the blade 200 at a preset position.

[0061] In step S01, for example, when the wind turbine generator set is in a shutdown state, the blade 200 is stopped at a preset position. The preset position may be the position of the blade 200 when the wind turbine generator set is in a shutdown state.

[0062] Step S02: The annular member 110 is set on the blade body 210. The annular member 110 includes a main body 111. The main body 111 is set around the blade body 210. A buffer member 120 is set on the side of the main body 111 away from the surface of the blade body 210 to reduce the eddy current energy attached to the surface of the blade 200.

[0063] In the vibration suppression method for blade 200 provided in the embodiment of the present application, an annular member 110 is provided on blade body 210. The main body 111 of annular member 110 can change the vortex flow state on the surface of blade 200, thereby improving the flutter phenomenon of blade 200. Buffer members 120 are provided on main body 111. Multiple buffer members 120 are distributed at intervals to disrupt the aerodynamic shape of blade 200, reduce the vortex energy attached to the surface of blade 200, further reduce the flutter phenomenon of blade 200, and extend the service life of blade 200.

[0064] Optionally, the blade body 210 includes a vibration suppression area 211 , and in step S02 , the annular member 110 may also be disposed in the vibration suppression area 211 .

[0065] Optionally, in step S02, a plurality of annular members 110 are spaced apart on the blade body 210 along the length direction of the blade body 210. The provision of a plurality of annular members 110 can further reduce the flutter phenomenon of the blade 200 and increase the service life of the blade 200.

[0066] Please continue reading Figure 2 Optionally, in step S02, a plurality of the annular members 110 are spaced apart on the blade body 210 along the length direction of the blade 200, and a bridge member 130 is connected between two adjacent annular members 110. The provision of the bridge member 130 can ensure the stability of the relative position between adjacent annular members 110, thereby ensuring the stability of the relative position between the annular member 110 and the blade body 210.

[0067] See also Figure 2 and Figure 3 , Figure 3 2 is a flow chart of a vibration suppression method for a blade 200 provided in another embodiment of the present application.

[0068] like Figure 2 As shown, the blade body 210 includes a maximum chord length position 214, and the chord length of the maximum chord length position 214 is greater than the chord length of other parts of the blade body 210. Figure 3 As shown, step S02 may include:

[0069] Step S021: disposing one of the members in a circular shape on one side of the maximum chord length position 214 in the length direction.

[0070] Step S022 : disposing another annular member 110 on the other side of the maximum chord length position 214 in the length direction.

[0071] Step S023 : using the bridge member 130 to connect two adjacent annular members 110 located on both sides of the maximum chord length position 214 in the longitudinal direction.

[0072] In these optional embodiments, the bridge member 130 can further improve the aerodynamic shape of the blade 200, and through the limitation of the bridge member 130 and the maximum chord length position 214, the stability of the relative position of the annular member 110 and the blade 200 can be ensured, and the structure of the vibration suppression device 100 will not be damaged, so that the vibration suppression device 100 can be reused and the installation and disassembly of the vibration suppression device 100 can be simple, convenient and quick.

[0073] See also Figure 4 , Figure 4 Schematic diagram of the structure of the annular member in a blade vibration suppression method provided in an embodiment of the present application. Figure 4As shown, the main body 111 has a first end 111a and a second end 111b that are detachably connected to each other. Then in step S02: the annular member 110 is arranged around the blade body 210 so that the first end 111a and the second end 111b are adjacent to each other, and the first end 111a and the second end 111b are connected using a connecting portion to set the annular member 110 on the blade body 210.

[0074] In these optional embodiments, the annular member 110 is in a strip shape before installation and has a first end 111a and a second end 111b relative to each other. The first end 111a and the second end 111b are connected by a connecting portion to surround the annular member 110 on the circumferential side of the blade body 210, which can simplify the installation method of the annular member 110 and facilitate the installation of the annular member 110.

[0075] See also Figure 5 , Figure 5 A schematic structural diagram of a wind turbine provided in an embodiment of the present application.

[0076] like Figure 5 As shown, the wind turbine generator set provided in the embodiment of the present application includes a tower 300 and a nacelle 400 arranged on the top of the tower 300, and three blades 200 are rotatably arranged relative to the nacelle 400.

[0077] See also Figure 6 and Figure 7 , Figure 6 FIG2 is a schematic structural diagram of a blade 200 provided in an embodiment of the present application. The blade 200 may be the blade 200 in the wind turbine generator set in the above embodiment. Figure 7 It is a partially enlarged three-dimensional structural schematic diagram of a blade 200 provided in an embodiment of the present application.

[0078] like Figure 6 and Figure 7 As shown, the blade 200 includes a blade body 210 having a vibration suppression region 211; and a vibration suppression device 100, wherein the annular member 110 of the vibration suppression device 100 is disposed around the blade body 210 in the vibration suppression region 211. By disposing the vibration suppression device 100 in the vibration suppression region 211 of the blade body 210, the aerodynamic shape of the blade 200 is changed, thereby significantly improving the flutter problem of the blade 200.

[0079] The vibration suppression region 211 is the region where the vibration suppression device 100 is located. The vibration suppression region 211 can be arranged in various ways. The blade body 210 includes a blade tip 213 and a blade root 212 spaced apart along its length. The vibration suppression region 211 can be arranged, for example, near the blade root 212 or blade tip 213 of the blade 200.

[0080] In other embodiments, the blade body 210 includes a blade tip 213 and a blade root 212 spaced apart along its length. The vibration suppression region 211 is disposed proximate to the blade tip 213, and the vibration suppression region 211 extends along the length of the blade 200 from 1 / 3 to 1 / 2 of the length of the blade 200. The vibration suppression region 211 being disposed proximate to the blade tip 213 means that the minimum spacing between the vibration suppression region 211 and the blade tip 213 is smaller than the minimum spacing between the vibration suppression region 211 and the blade root 212.

[0081] Because blade root 212 is typically fixed to the hub of a wind turbine, flutter is less likely to occur there. The opposite is true for the area near blade tip 213, which is rotatable relative to tower 300 and typically smaller in size. Therefore, flutter is more likely to occur near blade tip 213 under external forces such as wind. In the embodiment of the present application, the vibration suppression region 211 is positioned near blade tip 213, significantly reducing the flutter problem of blade 200.

[0082] In addition, when the vibration suppression area 211 is within the above range, it can avoid the problem that the vibration suppression area 211 is too small, resulting in insufficient vibration suppression effect and failure to effectively improve the flutter problem of the blade 200; it can also improve the problem that the vibration suppression area 211 is too large, resulting in the vibration suppression device 100 being too large to be installed on the blade 200, and the vibration suppression device 100 itself being too heavy, causing the blade 200 to bend.

[0083] See also Figure 7 and Figure 8 , Figure 8 FIG1 is a schematic structural diagram of a vibration suppression device 100 provided in an embodiment of the present application. The vibration suppression device 100 can be used for the blade 200 described above.

[0084] like Figure 7 and Figure 8 As shown, the vibration suppression device 100 is used to suppress the flutter of the blades 200 of the wind turbine generator set. The vibration suppression device 100 includes: an annular member 110, having a main body 111 and a hollow space 112 formed by the main body 111 to accommodate part of the blades 200; a buffer member 120, which is arranged on the side of the main body 111 away from the hollow space 112, and a plurality of buffer members 120 are distributed at intervals on the annular member 110.

[0085] In the vibration suppression device 100 provided in the embodiment of the present application, the vibration suppression device 100 includes an annular member 110 and a buffer member 120. The annular member 110 is configured to be mounted on the exterior of the blade 200 through a hollow space 112. The mesh-shaped main body 111 of the annular member 110 can alter the vortex flow state on the surface of the blade 200, thereby improving the flutter phenomenon of the blade 200. The buffer members 120 are provided on the main body 111. The multiple buffer members 120 are distributed at intervals to disrupt the aerodynamic shape of the blade 200, reduce the vortex energy attached to the surface of the blade 200, further reduce the flutter phenomenon of the blade 200, and increase the service life of the blade 200.

[0086] The ring member 110 can be made of a variety of materials, such as nylon, canvas, cotton, elastic rubber, or elastic bands. This allows the ring member 110 to be soft and prevent scratching the outer surface of the blade 200. Further configuring the ring member 110 in a mesh or hollow shape can further alter the eddy flow on the surface of the blade 200, reducing flutter and reducing the weight of the ring member to prevent bending stress on the blade.

[0087] There are many ways to set up the buffer 120. The buffer 120 can include soft and lightweight materials such as brushes, cloth strips, sponges, and foams, so that the buffer 120 can change the aerodynamic shape of the blade 200 surface without causing the risk of the blade 200 bending due to being too heavy. The cloth strips can be rough, the sponges can be porous, and the foam can be porous, so that the buffer 120 has an irregular shape, which can better improve the aerodynamic shape of the blade 200 and reduce the eddy current energy on the surface of the blade 200. The buffer 120 can be multiple components that are independent of the annular member 110 and then fixed to the annular member 110, wherein the buffer 120 can include at least one raised structure; or it can be a component that is integrated with the annular member 110, that is, multiple raised shapes on the surface of the annular member 110 constitute multiple buffers 120, and in this case, the multiple raised shapes are spaced apart and distributed on the surface of the annular member 110.

[0088] There are various ways to fix the annular member 110 to the surface of the blade 200. Optionally, the annular member 110 can be directly bonded to the surface of the blade body 210. When the vibration suppression device 100 needs to be removed from the surface of the blade 200, the annular member 110 can be directly torn off from the surface of the blade 200, making the installation and removal of the vibration suppression device 100 more convenient and quick.

[0089] See also Figure 8 and Figure 9 , Figure 9 1 is a schematic structural diagram of a vibration suppression device 100 in another state provided by another embodiment of the present application.

[0090] In other embodiments, Figure 8 and Figure 9 As shown, the main body 111 has a first end 111a and a second end 111b that are detachably connected to each other. The vibration suppression device 100 also includes a connecting portion, such as a snap-fit component, an adhesive component, an insert component, a clamping component, etc., for connecting the first end 111a and the second end 111b to form the annular main body 111. For example, the clamping component is used to connect the first end 111a and the second end 111b to form the annular main body 111. When the vibration suppression device 100 is installed on the blade 200, the first end 111a and the second end 111b are connected to each other by the clamping component, so that the main body 111 surrounds the blade body 210.

[0091] In these optional embodiments, before the vibration suppression device 100 is installed, the first end 111a and the second end 111b of the annular member 110 are disassembled, so that the annular member 110 is in a strip-like shape. During the installation of the vibration suppression device 100, the annular member 110 can be wrapped around the outer surface of the blade 200, and then the first end 111a and the second end 111b can be connected to each other using a clamping member. The clamping member can be, for example, a pair of pliers. When the vibration suppression device 100 is disassembled, the first end 111a and the second end 111b can be disassembled using the clamping member, so that the annular member 110 returns to its strip-like shape. By clamping the first end 111a and the second end 111b using the clamping member, the outer shape of the vibration suppression device 100 is not damaged, making the vibration suppression device 100 reusable.

[0092] Optionally, the blade 200 further includes a leading edge and a trailing edge disposed opposite each other in the chord direction thereof, and the first end 111a and the second end 111b are connected to each other at the leading edge or the trailing edge of the blade 200. That is, a clamping member connects the first end 111a and the second end 111b to each other at the leading edge and the trailing edge of the blade 200. The blade 200 has a smaller thickness at the leading edge and the trailing edge, which facilitates the operation of the clamping member.

[0093] In some other optional embodiments, a fixing portion is protruding from the surface of the blade body 210, and the annular member 110 is fixedly connected to the blade body 210 via the fixing portion. By providing the fixing portion at a reasonable position on the surface of the blade 200, on the one hand, it is convenient to connect the annular member 110 with the fixing portion at a reasonable position. On the other hand, when the annular member 110 is laid on the surface of the blade 200, the annular member 110 can be fixed to the blade body 210 via the fixing portion while being laid, which facilitates the installation of the vibration suppression device 100 on the blade 200 and improves the installation efficiency of the vibration suppression device 100.

[0094] The fixing portion is, for example, a fixing screw, which can be inserted into a hole drilled on the blade body 210. After the vibration suppression device 100 is disassembled, the surface of the blade body 210 can be repaired to ensure the integrity of the surface of the blade 200.

[0095] Optionally, the vibration suppression device 100 can be fixed to the surface of the blade 200 by magnetic attraction. For example, a magnetic attraction component can be disposed within the annular member 110 and can be attracted to the surface of the blade 200. Alternatively, a lightning protection metal mesh can be disposed within the blade 200, and a magnetic attraction component can be disposed within the annular member 110 and can be attracted to the surface of the blade 200 through the lightning protection metal mesh.

[0096] The number of annular members 110 provided in the vibration suppression device 100 can vary. For example, there can be one annular member 110. Alternatively, in other embodiments, there can be two or more annular members 110, with the two or more annular members 110 being arranged side by side along the length of the blade body 210. Providing two or more annular members 110 can further improve the aerodynamic shape of the blade 200 and alleviate the flutter problem of the blade 200.

[0097] There are many ways to arrange two or more annular members 110 side by side. For example, at least two of the two or more annular members 110 can be arranged side by side with an interval, that is, there is a distance between at least two adjacent annular members 110.

[0098] Alternatively, at least two of the more than two annular members 110 are disposed adjacent to each other, that is, at least two adjacent annular members 110 are arranged side by side with no space between them.

[0099] Alternatively, at least two of the two or more annular members 110 are overlapped with each other, that is, at least two adjacent annular members 110 are arranged side by side and at least a portion of one of the annular members 110 overlaps at least a portion of the other annular member 110 on a side facing away from the blade 200.

[0100] See also Figure 10 and Figure 11 , Figure 10 is a structural diagram of a vibration suppression device 100 provided in another embodiment of the present application. Figure 11 1 is a schematic structural diagram of a vibration suppression device 100 in use according to an embodiment of the present application.

[0101] In some optional embodiments, such as Figure 10 and Figure 11As shown, the vibration suppression device 100 further includes a bridge member 130 for connecting two adjacent annular members 110 along the length of the blade 200. The bridge member 130 provides a position limit for the two adjacent annular members 110, ensuring the stability of the relative position between the annular members 110 and the blade 200. Furthermore, the bridge member 130 improves the aerodynamic shape of the blade 200, further alleviating the flutter problem of the blade 200.

[0102] In some optional embodiments, such as Figure 7 As shown, the blade body 210 has a maximum chord length position 214, the chord length of the maximum chord length position 214 is greater than the chord length of other parts of the blade body 210, at least two annular members 110 are spaced apart and distributed on both sides of the maximum chord length position 214, and the annular members 110 located on both sides of the maximum chord length position 214 are connected to each other by a bridging member 130 extending along the length direction.

[0103] Because the chord length of the maximum chord length position 214 is greater than the chord lengths of other parts of the blade body 210, the chord length of the blade 200 at the location of the annular member 110 is smaller than the chord length of the maximum chord length position 214. The size of the hollow space 112 of the annular member 110 is smaller than the size of the maximum chord length position 214, and the minimum chord length position can provide a limit for the annular member 110. At least two annular members 110 are arranged on both sides of the maximum chord length position, so that the annular members 110 will not move toward the maximum chord length position 214. In addition, the annular members 110 on both sides of the maximum chord length position 214 are connected to each other by a bridge member 130 extending along the length direction. Therefore, under the limiting effect of the bridge member 130, the annular members 110 will not move away from the maximum chord length position 214.

[0104] In these optional embodiments, the bridge member 130 can further improve the aerodynamic shape of the blade 200, and through the limitation of the bridge member 130 and the maximum chord length position 214, the stability of the relative position of the annular member 110 and the blade 200 can be ensured, and the structure of the vibration suppression device 100 will not be damaged, so that the vibration suppression device 100 can be reused and the installation and disassembly of the vibration suppression device 100 can be simple, convenient and quick.

[0105] The number of the bridge member 130 can be one, or the number of the bridge member 130 can be two or more. The two or more bridge members 130 are used to be spaced apart along the chord direction of the blade 200 to provide a more stable limiting effect to the annular member 110 through the two or more bridge members 130.

[0106] Optionally, the blade 200 includes a windward surface and a leeward surface that are arranged opposite to each other, and two or more bridging members 130 are respectively arranged on the windward surface and the leeward surface, so that the force applied to the annular member 110 is more balanced.

[0107] The buffer 120 can be configured in a variety of ways. For example, the buffer 120 can be prismatic, cylindrical, or irregularly shaped. When the buffer 120 is a quadrangular prism, the cross-sectional dimensions of the buffer 120 are less than or equal to 15 cm by 10 cm. When the buffer 120 is cylindrical, the cross-sectional diameter of the buffer 120 is less than or equal to 15 cm. When the dimensions of the buffer 120 are within the above range, the buffer 120 can be prevented from being too large, thereby affecting the buffer 120's effect on improving the eddy current energy on the surface of the blade 200.

[0108] Optionally, multiple buffer members 120 are distributed in rows and columns on the surface of the annular member 110, with the spacing between two adjacent rows and / or columns of buffer members 120 being 15 cm to 25 cm. Optionally, the spacing between any two adjacent buffer members 120 is 15 cm to 25 cm. When the spacing between two adjacent buffer members 120 is within the above range, it is possible to avoid the spacing between adjacent buffer members 120 being too large or too small, thereby affecting the improvement of the aerodynamic shape of the blade 200.

[0109] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A method for suppressing vibration of a blade (200), characterized in that: The blade (200) comprises a blade body (210), and the method comprises: Stopping the blade (200) at a preset position; A plurality of annular members (110) are spaced apart on the blade body (210) along the length direction of the blade (200); a bridge member (130) is connected between two adjacent annular members (110); the annular member (110) comprises a main body (111), the main body (111) is arranged around the blade body (210); a buffer member (120) is provided on a side of the main body (111) facing away from the surface of the blade body (210) to reduce eddy current energy attached to the surface of the blade (200); The blade body (210) includes a maximum chord length position (214), and the chord length of the maximum chord length position (214) is greater than the chord lengths of other parts of the blade body (210); In the step of arranging a plurality of annular members (110) at intervals on the blade body (210) along the length direction of the blade (200), and connecting a bridge member (130) between two adjacent annular members (110): Disposing one of the annular members (110) on one side of the maximum chord length position (214) in the length direction; Disposing another annular member (110) on the other side of the maximum chord length position (214) in the length direction; A bridging member (130) is used to connect two adjacent annular members (110) located on both sides of the maximum chord length position (214) in the length direction.

2. The method according to claim 1, characterized in that The main body (111) has a first end (111a) and a second end (111b) that are detachably connected to each other. In the step of arranging a plurality of annular members (110) at intervals along the length direction of the blade (200) on the blade body (210), The annular member (110) is arranged around the blade body (210) so that the first end (111a) and the second end (111b) are adjacent to each other, and the first end (111a) and the second end (111b) are connected using a connecting portion to arrange the annular member (110) on the blade body (210).

3. A blade (200), characterized in that: include: The blade body (210) has a vibration suppression area (211); A vibration suppression device (100) comprises an annular member (110) and a buffer member (120), wherein the annular member (110) has a main body (111) and a hollow space (112) formed by surrounding the main body (111) and used to accommodate the blade body (210), the buffer member (120) being arranged on a side of the main body (111) away from the hollow space (112), a plurality of the buffer members (120) being spaced apart on the annular member (110), and the annular member (110) of the vibration suppression device (100) being arranged around the blade body (210) in the vibration suppression area (211); The blade body (210) has a maximum chord length position (214), the chord length of the maximum chord length position (214) is greater than the chord length of other parts of the blade body (210), at least two annular members (110) are spaced apart and distributed on both sides of the maximum chord length position (214), and the annular members (110) located on both sides of the maximum chord length position (214) are connected to each other via a bridging member (130) extending along the length direction.

4. The blade (200) according to claim 3, characterized in that The blade body (210) comprises a blade tip (213) and a blade root (212) spaced apart along its length direction; the vibration suppression region (211) is arranged close to the blade tip (213); and an extension dimension of the vibration suppression region (211) in the length direction of the blade (200) is 1 / 3 to 1 / 2 of the length of the blade (200).

5. The blade (200) according to claim 3, characterized in that The annular member (110) is bonded to the surface of the blade body (210); Alternatively, the vibration suppression device (100) further comprises a clamping component, the main body (111) having a first end (111a) and a second end (111b) detachably connected to each other, the first end (111a) and the second end (111b) being connected to each other via the clamping component so that the main body (111) surrounds the blade body (210); Alternatively, a fixing portion is protruding from the surface of the blade body (210), and the annular member (110) is fixedly connected to the blade body (210) via the fixing portion.

6. The blade (200) according to claim 3, characterized in that The main body (111) has a first end (111a) and a second end (111b) that are detachably connected to each other; The vibration suppression device (100) further comprises a connecting portion, the connecting portion being used to connect the first end (111a) and the second end (111b) to form the annular main body portion (111).

7. The blade (200) according to claim 3, characterized in that The number of the annular members (110) is more than two, and the more than two annular members (110) are distributed side by side on the blade (200) along the length direction of the blade (200).

8. The blade (200) according to claim 3, characterized in that There are more than two bridging members (130), and the more than two bridging members (130) are distributed at intervals along the chord direction of the blade (200).

9. The blade (200) according to claim 3, characterized in that The plurality of buffer members (120) are distributed in rows and columns on the surface of the annular member (110), and the spacing between two adjacent rows and / or two adjacent columns of the buffer members (120) is 15 cm to 25 cm.

10. A wind turbine generator set, characterized in that: The blade (200) comprises the blade (200) according to any one of claims 3 to 9.

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