CN115875190A

CN115875190A - Vibration suppression device, blade, wind generating set and vibration suppression method

Info

Publication number: CN115875190A
Application number: CN202111153121.6A
Authority: CN
Inventors: 陈威; 杨建军; 周培蕊; 王兴波; 朱罩军
Original assignee: Jiangsu Goldwind Science and Technology Co Ltd
Current assignee: Jiangsu Goldwind Science and Technology Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2023-03-31
Also published as: WO2023050619A1

Abstract

The embodiment of the application provides a vibration suppression device, a blade, a wind generating set and a vibration suppression method, wherein the vibration suppression method of the blade comprises the following steps: stopping the blade at a preset position; set up the annular member in the blade body, the annular member includes this somatic part, and this somatic part encircles the blade body setting, and this somatic part deviates from one side on blade body surface and is provided with the bolster to reduce the adnexed vortex energy in blade surface. In the vibration suppression method for the blade provided by the embodiment of the application, the annular piece is arranged on the blade body, the buffer piece is arranged on the annular piece, and the annular piece is sleeved outside the blade body. The body part is provided with the buffering parts, the plurality of buffering parts are distributed at intervals to damage the aerodynamic appearance of the blade, the eddy energy attached to the surface of the blade is reduced, the flutter phenomenon of the blade can be further reduced, and the service life of the blade is prolonged.

Description

Vibration suppression device, blade, wind generating set and vibration suppression method

Technical Field

The application relates to the technical field of wind power equipment, in particular to a vibration suppression device, a blade, a wind generating set and a vibration suppression method.

Background

With the continuous development of the technology, people have better requirements on the safety and the service life of the wind generating set. No matter the wind generating set on the sea or land, after the blade is hoisted on the tower barrel, because the blade is a structural body with different chord lengths from the blade root to the blade tip, and each cross section of the blade has a torsional angle, when the wind generating set is shut down, the blade can vibrate under the action of wind force, the blade can be damaged by fatigue due to vibration, and the service life of the blade is seriously influenced.

Disclosure of Invention

The embodiment of the application provides a vibration suppression device, a blade, a wind generating set and a vibration suppression method, and aims to suppress the flutter problem of the blade under the action of wind power when the wind generating set stops.

Embodiments of a first aspect of the present application provide a method of damping vibration of a blade, the blade comprising a blade body, the method comprising:

stopping the blade at a preset position;

set up the annular member in the blade body, the annular member includes this somatic part, and this somatic part encircles the blade body setting, and one side that this somatic part deviates from the blade body surface is provided with the bolster to reduce the adnexed vortex energy in blade surface.

According to an embodiment of the first aspect of the present application, in the step of providing the ring-shaped member to the blade body: a plurality of ring members are disposed at intervals in the vibration damping region along the length direction of the blade body.

According to any of the preceding embodiments of the first aspect of the application, in the step of providing the ring-shaped element to the blade body: and arranging a plurality of annular pieces at intervals along the length direction of the blade on the blade body, and connecting a bridge piece between two adjacent annular pieces.

According to any of the previous embodiments of the first aspect of the present application, the blade body comprises a maximum chord length position, and the chord length of the maximum chord length position is larger than the chord length of other parts of the blade body;

in the step of providing the ring member to the blade body:

one annular piece is arranged on one side of the maximum chord length position in the length direction;

arranging another annular piece on the other side of the maximum chord length position in the length direction;

two adjacent annular members located on both sides in the length direction of the maximum chord length position are connected by a bridge member.

According to any of the embodiments of the first aspect of the present application, the body portion has a first end and a second end detachably connected to each other, and in the step of providing the ring-shaped member to the blade body:

the ring is disposed around the blade body such that the first and second ends are adjacent, and the ring is disposed to the blade body using a connection to connect the first and second ends.

Embodiments of a second aspect of the present application provide a vibration suppressing device for suppressing flutter of a blade of a wind turbine generator set, the vibration suppressing device including: the annular piece is provided with a body part and a hollow space which is formed by the body part in a surrounding mode and is used for accommodating part of the blades; the buffer parts are arranged on one side of the body part, which is far away from the hollow space, and the plurality of buffer parts are distributed on the annular piece at intervals.

According to an embodiment of the second aspect of the present application, the body portion has a first end and a second end detachably connected to each other; the vibration suppressing device further includes a connecting portion for connecting the first end and the second end to form an annular body portion.

According to any one of the embodiments of the second aspect of the present application, the number of the ring-shaped members is two or more, and the two or more ring-shaped members are arranged in the blade side by side along the length direction of the blade.

According to any one of the preceding embodiments of the second aspect of the present application, further comprising: and the bridge piece is used for connecting two adjacent annular pieces in the length direction of the blade.

According to any of the preceding embodiments of the second aspect of the present application, the bridge members are two or more, the two or more bridge members being adapted to be spaced apart along the chord of the blade.

According to any one of the previous embodiments of the second aspect of the present application, the plurality of buffering 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 buffering members is 15 cm-25 cm.

Embodiments of the third aspect of the present application also provide a blade comprising: a blade body having a vibration damping region; in the vibration suppressing device according to any of the second aspect embodiments described above, the ring member of the vibration suppressing device is disposed around the blade body in the vibration suppressing region.

According to the third aspect of the present application, the blade body comprises the blade and the blade root which are distributed at intervals along the length direction of the blade body, the vibration suppression area is arranged close to the blade tip, and the extension dimension of the vibration suppression area in the length direction of the blade is 1/3-1/2 of the length of the blade.

According to any of the previous embodiments of the third aspect of the present application, the ring is adhered to the surface of the blade body;

or the vibration suppression device further comprises a clamping component, the body part is provided with a first end and a second end which are detachably connected with each other, and the first end and the second end are connected with each other through the clamping component so that the body part surrounds the blade body;

or the surface of the blade body is convexly provided with a fixing part, and the annular part is fixedly connected to the blade body through the fixing part.

According to any one of the embodiments of the third aspect of the present application, the number of the ring members is two or more, and the two or more ring members are arranged side by side along the length direction of the blade body.

According to any one of the previous 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 larger than the chord length of other parts of the blade body, at least two ring-shaped members are spaced apart on both sides of the maximum chord length position, and the ring-shaped members on both sides of the maximum chord length position are connected to each other by a bridge member extending in the length direction.

Embodiments of the fourth aspect of the present application further provide a wind turbine generator system including a blade according to any one of the embodiments of the third aspect.

In the vibration suppression method for the blade provided by the embodiment of the application, the annular piece is arranged on the blade body, the buffer piece is arranged on the annular piece, and the annular piece is sleeved outside the blade body. The body part is provided with the buffering parts, the plurality of buffering parts are distributed at intervals to damage the aerodynamic appearance of the blade, the eddy energy attached to the surface of the blade is reduced, the flutter phenomenon of the blade can be further reduced, and the service life of the blade is prolonged.

Drawings

Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like or similar reference characters identify the same or similar features.

FIG. 1 is a schematic flow diagram illustrating a method for damping vibration of a blade according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a blade damping method according to an embodiment of the present disclosure.

FIG. 3 is a flow chart illustrating a method for damping vibration of a blade according to another embodiment of the present application.

FIG. 4 is a schematic structural view illustrating a state of a ring member in a method for suppressing vibration of a blade according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a blade according to an embodiment of the present disclosure

Fig. 7 is a schematic partial enlarged perspective view of a blade according to an embodiment of the present application.

FIG. 8 is a schematic structural diagram of a vibration suppressing device provided in an embodiment of the present application;

FIG. 9 is a schematic view of a vibration suppressing device in another state according to another embodiment of the present application;

FIG. 10 is a schematic structural diagram of a vibration damping device according to another embodiment of the present application;

fig. 11 is a schematic structural diagram of a vibration suppression device provided in an embodiment of the present application in a use state.

Description of reference numerals:

100. a vibration suppressing device;

110. an annular member; 111. a body portion; 111a, a first end; 111b, a second end; 112. a hollow space;

120. a buffer member;

130. a bridge member;

200. a blade;

210. a blade body; 211. a vibration suppression area; 212. a blade root; 213. a blade tip; 214. the maximum chord length position;

300. a tower drum;

400. a nacelle.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced 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 thereof. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.

With the continuous development of wind generating sets, the wind generating sets can be arranged both on the sea and on the land. In the wind generating set on the sea or on the road, the blade of the wind generating set is easy to vibrate after being installed and before being used. When the blade is in the flutter pile body for a long time, the blade is easy to generate fatigue damage, and therefore the service life of the blade is seriously influenced. In addition, because the blade is an unequal chord length distribution body from the blade root to the blade tip and each section has a torsion angle, when the included angle between the aerodynamic force and the chord length of the surface of the blade is large, the shedding vortex frequency of the front edge and the rear edge of each section is unequal, so that the integral shedding vortex frequency spectrum of the blade is wide, and the integral shedding vortex frequency spectrum is easy to resonate with the natural frequency of the blade body.

The inventors have found that by placing vibration-damping dampers externally on the blade surface, the problem of blade flutter can be reduced or alleviated. For example, a net bag, an irregular block and the like can be used to be attached to the surface of the blade to break the original aerodynamic shape of the blade, so that the aim of inhibiting the blade from fluttering is fulfilled.

For better understanding of the present application, a vibration suppressing apparatus, a blade, a wind turbine generator set, and a vibration suppressing method of the blade according to an embodiment of the present application will be described in detail below with reference to fig. 1 to 9.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic flow chart illustrating a method for damping vibration of a blade 200 according to an embodiment of the present disclosure. Fig. 2 is a schematic usage diagram of a vibration damping method for a blade 200 according to an embodiment of the present application. The blade 200 is used for a wind turbine generator system.

As shown in fig. 1 and 2, the blade 200 includes a blade body 210. The method of damping the blade 200 includes:

step S01: the blade 200 is stopped at a preset position.

In step S01, for example, when the wind turbine generator system is in a shutdown state, the blade 200 is stopped at a preset position. The preset position may be a position in which the blade 200 is located when the wind turbine generator set is in a shutdown state.

Step S02: the ring element 110 is arranged on the blade body 210, the ring element 110 includes a body portion 111, the body portion 111 is arranged around the blade body 210, and a buffer 120 is arranged on a side of the body portion 111 facing away from the surface of the blade body 210 to reduce the eddy energy attached to the surface of the blade 200.

In the vibration suppression method of the blade 200 provided by the embodiment of the application, by arranging the ring piece 110 on the blade body 210, the body part 111 of the ring piece 110 can change the vortex flow state on the surface of the blade 200, and the flutter phenomenon of the blade 200 is improved. The body 111 is provided with the buffer members 120, and the plurality of buffer members 120 are distributed at intervals to damage the aerodynamic shape of the blade 200, reduce the eddy energy attached to the surface of the blade 200, further reduce the flutter of the blade 200, and prolong the service life of the blade 200.

Alternatively, the blade body 210 includes the vibration suppressing region 211, and then the ring member 110 may be further provided to the vibration suppressing region 211 in step S02.

Optionally, in step S02: a plurality of ring members 110 are provided at intervals in the blade body 210 in a length direction of the blade body 210. The flutter phenomenon of the blade 200 can be further reduced by arranging the plurality of ring-shaped members 110, and the service life of the blade 200 is prolonged.

Referring to fig. 2, optionally, in step S02, a plurality of ring members 110 are disposed at intervals on the blade body 210 along the length direction of the blade 200, and a bridge member 130 is connected between two adjacent ring members 110. The stability of the relative position between adjacent ring members 110, and thus between the ring members 110 and the blade body 210, can be ensured by providing the bridge members 130.

Referring to fig. 2 and 3, fig. 3 is a schematic flow chart illustrating a method for damping vibration of a blade 200 according to another embodiment of the present application.

As shown in fig. 2, the blade body 210 includes a maximum chord position 214, and the chord length of the maximum chord position 214 is greater than the chord length of other portions of the blade body 210. As shown in fig. 3, step S02 may include:

step S021: one of the pieces is positioned annularly on one side of the maximum chord position 214 in the length direction.

Step S022: another ring 110 is disposed on the other side of the maximum chord position 214 in the length direction.

Step S023: two adjacent ring members 110 on both sides in the length direction of the maximum chord length position 214 are connected by a bridge member 130.

In these alternative embodiments, the bridge 130 can further improve the aerodynamic profile of the blade 200, and by limiting the bridge 130 and the maximum chord length position 214, the stability of the relative positions of the ring 110 and the blade 200 can be ensured, the structure of the vibration suppression device 100 is not damaged, the vibration suppression device 100 can be reused, and the installation and the disassembly of the vibration suppression device 100 are simple, convenient and quick.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a ring component in a method for suppressing vibration of a blade according to an embodiment of the present application. As shown in fig. 4, the body portion 111 has a first end 111a and a second end 111b detachably connected to each other, and then in step S02: the ring 110 is disposed around the blade body 210 such that the first end 111a and the second end 111b are adjacent, and the first end 111a and the second end 111b are connected using a connecting portion to dispose the ring 110 to the blade body 210.

In these alternative embodiments, the ring member 110 is in a strip shape before being installed, and has the first end 111a and the second end 111b opposite to each other, and the ring member 110 is wrapped around the circumference of the blade body 210 by connecting the first end 111a and the second end 111b by a connecting portion, which can simplify the installation method of the ring member 110 and facilitate the installation of the ring member 110.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a wind turbine provided in an embodiment of the present application.

As shown in FIG. 5, the wind turbine generator system provided by the embodiment of the present application includes a tower 300 and a nacelle 400 disposed on top of the tower 300, and three blades 200 are rotatably disposed with respect to the nacelle 400.

Referring to fig. 6 and 7, fig. 6 is a schematic structural diagram of a blade 200 according to an embodiment of the present disclosure. The blade 200 may be the blade 200 in the wind turbine generator system according to the above-described embodiment. Fig. 7 is a partially enlarged perspective view of a blade 200 according to an embodiment of the present application.

As shown in fig. 6 and 7, the blade 200 includes: a blade body 210 having a vibration damping region 211; in the vibration suppressing device 100, the ring member 110 of the vibration suppressing device 100 is disposed around the blade body 210 at the vibration suppressing region 211. By arranging the vibration suppression device 100 in the vibration suppression area 211 of the blade body 210, the aerodynamic shape of the blade 200 is changed, and the flutter problem of the blade 200 can be well improved.

The vibration suppressing region 211 is a region where the vibration suppressing device 100 is located. The vibration suppressing region 211 may be disposed in various ways, the blade body 210 includes a blade tip 213 and a blade root 212 spaced apart along the length direction thereof, and the vibration suppressing region 211 may be disposed near the blade root 212 or the blade tip 213 of the blade 200, for example.

In other embodiments, the blade body 210 includes a blade tip 213 and a blade root 212 spaced apart along the length thereof, the vibration damping region 211 is disposed adjacent to the blade tip 213, and the vibration damping region 211 extends along the length of the blade 200 by 1/3 to 1/2 of the length of the blade 200. The vibration damping region 211 is disposed proximate to the blade tip 213, meaning that the minimum spacing between the vibration damping region 211 and the blade tip 213 is less than the minimum spacing between the vibration damping region 211 and the blade root 212.

Since the blade root 212 is typically fixed to the hub of the wind park, the blade root 212 is less prone to flutter problems. In the region near the blade tip 213, the blade tip 213 is arranged rotatably with respect to the tower 300, and the blade tip 213 of the blade 200 is generally small in size, so that the region near the blade tip 213 is prone to flutter under external forces such as wind. In the embodiment of the present application, the vibration suppression region 211 is disposed close to the blade tip 213, so that the flutter problem of the blade 200 can be well improved.

In addition, when the vibration suppression area 211 is in the range, the insufficient vibration suppression effect caused by the too small vibration suppression area 211 can be avoided, and the flutter problem of the blade 200 cannot be improved well; the problems that the vibration suppressing area 211 is too large, the vibration suppressing device 100 is too large in size and difficult to be arranged on the blade 200, and the blade 200 is bent due to the large weight of the vibration suppressing device 100 can be solved.

Referring to fig. 7 and 8, fig. 8 is a schematic structural diagram of a vibration suppression device 100 according to an embodiment of the present disclosure. The vibration damping device 100 may be used with the blade 200 described above.

As shown in fig. 7 and 8, the vibration suppressing device 100 is for suppressing flutter of a blade 200 of a wind turbine generator system, and the vibration suppressing device 100 includes: a ring member 110 having a body portion 111 and a hollow space 112 formed by the body portion 111 to accommodate a part of the blade 200; the buffer members 120 are disposed on a side of the body 111 away from the hollow space 112, and the plurality of buffer members 120 are spaced apart from each other on the ring member 110.

In the vibration suppressing device 100 provided in the embodiment of the present application, the vibration suppressing device 100 includes a ring member 110 and a buffer member 120, and the ring member 110 is configured to be sleeved outside the blade 200 through the hollow space 112. The mesh-shaped body 111 of the ring 110 can change the vortex flow state on the surface of the blade 200, and improve the flutter of the blade 200. The body 111 is provided with the buffer members 120, and the plurality of buffer members 120 are distributed at intervals to damage the aerodynamic shape of the blade 200, reduce the eddy energy attached to the surface of the blade 200, further reduce the flutter phenomenon of the blade 200, and prolong the service life of the blade 200.

The annular member 110 is made of various materials, for example, the annular member 110 may be made of nylon, canvas, cotton cloth, elastic rubber, elastic tape, etc., so that the annular member 110 is made of a soft material and does not scratch the outer surface of the blade 200. The annular member 110 is further arranged to be in a net shape or a hollow shape, so that the vortex flow state on the surface of the blade 200 can be further changed, and the flutter phenomenon of the blade 200 can be improved; and also be favorable to reducing the weight of annular member, avoid bringing the pressure of buckling for the blade.

The buffer member 120 may be disposed in various manners, and the buffer member 120 may include soft and light materials such as brushes, cloth strips, sponge, and foam, so that the buffer member 120 can change the aerodynamic shape of the surface of the blade 200, and at the same time, the blade 200 is not bent due to too heavy weight. The cloth can be chooseed for use coarse cloth, and porous sponge can be chooseed for use to the sponge, and porous foam can be chooseed for use to the foam for bolster 120 has anomalous appearance, and the pneumatic appearance of improvement blade 200 that can be better reduces the vortex energy on blade 200 surface. The buffer member 120 may be a plurality of members independent from the ring member 110, and then fixed to the ring member 110, wherein the buffer member 120 may include at least one protrusion structure; the damping member 120 may be a member integrated with the annular member 110, that is, a plurality of convex shapes are formed on the surface of the annular member 110 to form the plurality of damping members 120, and the plurality of convex shapes are distributed on the surface of the annular member 110 at intervals.

There are various ways of fixing the ring member 110 on the surface of the blade 200, and alternatively, the ring member 110 may be directly adhered to the surface of the blade body 210. When the vibration suppression device 100 needs to be detached from the surface of the blade 200, the ring member 110 is directly torn off from the surface of the blade 200, so that the vibration suppression device 100 is more convenient and quick to mount and detach.

Referring to fig. 8 and 9, fig. 9 is a schematic structural diagram of a vibration suppression device 100 in another state according to another embodiment of the present application.

In other embodiments, as shown in fig. 8 and 9, the body portion 111 has a first end 111a and a second end 111b detachably connected to each other; the vibration damping device 100 further includes a connecting portion, such as a snap member, an adhesive member, a plug member, a clamping member, etc., for connecting the first end 111a and the second end 111b to form the annular body 111. The interposed member is exemplified to connect the first end 111a and the second end 111b to form the annular body portion 111. When the vibration suppressing device 100 is provided to the blade 200, the first end 111a and the second end 111b are connected to each other by an interposed member so that the body portion 111 surrounds the blade body 210.

In these alternative embodiments, the first end 111a and the second end 111b of the loop 110 are disassembled prior to installation of the vibration damping device 100, such that the loop 110 is in the form of a strip. During installation of the vibration damping device 100, the ring member 110 may be wound around the outer surface of the blade 200, and then the first end 111a and the second end 111b may be connected to each other by using a clamping member. The clamping member may be, for example, a locking pliers. When the vibration suppressing device 100 is detached, the first end 111a and the second end 111b are detached by interposing members so that the ring member 110 is restored to the ribbon shape. By sandwiching the first end 111a and the second end 111b with a sandwiching member, the outer shape of the vibration suppressing device 100 is not damaged, so that the vibration suppressing device 100 can be reused.

Optionally, the blade 200 further includes a leading edge and a trailing edge oppositely disposed in the chord direction, 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, the 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 small thickness at the leading and trailing edges to facilitate the operation of clamping the components.

In some alternative embodiments, the surface of the blade body 210 is convexly provided with a fixing portion, and the ring member 110 is fixedly connected to the blade body 210 through the fixing portion. Through setting up the fixed part in the surperficial reasonable position of blade 200, on the one hand, be convenient for annular member 110 at reasonable position and fixed part interconnect, on the other hand, when annular member 110 laid the blade 200 surface, can lay the limit and fix annular member 110 in blade body 210 through the fixed part, be convenient for but the installation of vibration suppression device 100 on blade 200, and can improve the installation effectiveness of vibration suppression device 100.

The fixing portion is, for example, a fixing screw, and the fixing screw may be inserted after drilling a hole in the blade body 210. After the vibration suppressing device 100 is disassembled, the surface of the blade body 210 may be repaired to ensure the integrity of the surface of the blade 200.

Alternatively, the vibration suppressing device 100 may be magnetically attached to the surface of the blade 200. For example, a magnetic attraction component is arranged in the ring 110, and the magnetic attraction component can be attracted to the surface of the blade 200. Or, a lightning protection metal net is arranged in the blade 200, and a magnetic component is arranged in the ring-shaped member 110, and the magnetic component can be adsorbed on the surface of the blade 200 through the lightning protection metal net.

The damping device 100 has a plurality of ring members 110, and the ring member 110 may be, for example, one ring member. Alternatively, in other embodiments, the number of the ring-shaped members 110 may be two or more, and the two or more ring-shaped members 110 are arranged side by side along the length direction of the blade body 210. The more than two annular parts 110 can better change the aerodynamic shape of the blade 200 and better improve the flutter problem of the blade 200.

There are various ways in which two or more ring members 110 are arranged side by side with each other, for example, at least two ring members 110 of the two or more ring members 110 may be arranged side by side with a space between at least two adjacent ring members 110.

Alternatively, at least two of the two or more ring members 110 may be disposed adjacent to each other, i.e., at least two adjacent ring members 110 may be side-by-side without a space therebetween.

Alternatively, at least two ring members 110 of the two or more ring members 110 may overlap each other, that is, at least two adjacent ring members 110 are arranged side by side and at least a portion of one ring member 110 overlaps at least a portion of the other ring member 110 on a side facing away from the blade 200.

Referring to fig. 10 and fig. 11, fig. 10 is a schematic structural diagram of a vibration suppression device 100 according to another embodiment of the present application, and fig. 11 is a schematic structural diagram of a vibration suppression device 100 according to an embodiment of the present application in a use state.

In some alternative embodiments, as shown in fig. 10 and 11, the vibration suppressing device 100 further includes: and a bridge member 130 for connecting two ring members 110 adjacent to each other in a length direction of the blade 200. The bridge 130 can provide a limit for two adjacent ring-shaped members 110, and ensure the stability of the relative positions of the ring-shaped members 110 and the blades 200. In addition, the bridge 130 can also improve the aerodynamic profile of the blade 200, further improving the flutter problem of the blade 200.

In some alternative embodiments, as shown in fig. 7, the blade body 210 has a maximum chord length position 214, the chord length of the maximum chord length position 214 is larger than the chord length of other parts of the blade body 210, at least two ring members 110 are spaced apart on two sides of the maximum chord length position 214, and the ring members 110 on two sides of the maximum chord length position 214 are connected to each other by a bridge member 130 extending in the length direction.

Because the chord length of the maximum chord length position 214 is larger than the chord length of other parts of the blade body 210, the chord length of the blade 200 at the position 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 limit for the annular member 110. At least two rings 110 are positioned on either side of the maximum chord length, so that the rings 110 do not move toward the maximum chord length location 214. In addition, the ring members 110 located on both sides of the maximum chord position 214 are connected to each other by the bridge member 130 extending in the length direction, and therefore, the ring members 110 are not separated from the maximum chord position 214 by the limiting action of the bridge member 130.

In these alternative embodiments, the bridge 130 can further improve the aerodynamic profile of the blade 200, and by limiting the bridge 130 and the maximum chord position 214, the stability of the relative positions of the ring 110 and the blade 200 can be ensured, the structure of the vibration suppression device 100 is not damaged, the vibration suppression device 100 can be reused, and the installation and the disassembly of the vibration suppression device 100 are simple, convenient and quick.

The number of the bridges 130 may be one, or the number of the bridges 130 may be two or more, and the two or more bridges 130 are spaced apart along the chord direction of the blade 200 to provide a more stable spacing effect to the ring member 110 through the two or more bridges 130.

Optionally, the blade 200 includes a windward side and a leeward side opposite to each other, and two or more bridges 130 are disposed on the windward side and the leeward side, respectively, so that the stress of the ring 110 is more balanced.

The buffer member 120 may be disposed in various ways, for example, the buffer member 120 may have a prism shape, or the buffer member 120 may have a cylindrical shape or an irregular shape. When the buffer member 120 has a quadrangular prism shape, the cross-sectional dimension of the buffer member 120 is less than or equal to 15cm × 10cm. When the buffer member 120 is cylindrical, the cross-sectional diameter of the buffer member 120 is less than or equal to 15cm. When the size of the buffer member 120 is within the above range, it can be avoided that the buffer member 120 is too large to affect the improvement effect of the buffer member 120 on the surface eddy current energy of the blade 200.

Optionally, the plurality of buffering members 120 are distributed on the surface of the annular member 110 in rows and columns, and the distance between two adjacent rows and/or two adjacent columns of buffering members 120 is 15cm to 25cm. Optionally, the distance between any two adjacent buffer members 120 is 15cm to 25cm. When the distance between two adjacent buffering members 120 is within the above range, it can be avoided that the distance between two adjacent buffering members 120 is too large or too small, which may affect the improvement of the aerodynamic profile of the blade 200.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A method of damping vibration of a blade (200), the blade (200) comprising a blade body (210), the method comprising:

stopping the blade (200) at a preset position;

the annular piece (110) is arranged on the blade body (210), the annular piece (110) comprises a body portion (111), the body portion (111) is arranged around the blade body (210), and a buffer piece (120) is arranged on one side, away from the surface of the blade body (210), of the body portion (111) so as to reduce the attached eddy current energy on the surface of the blade (200).

2. The method of claim 1, wherein in the step of providing an annulus (110) to the blade body (210): the ring-shaped members (110) are provided to the blade body (210) at intervals in a length direction of the blade (200).

3. The method of claim 2, wherein in the step of providing an annulus (110) to the blade body (210): a plurality of annular pieces (110) are arranged on the blade body (210) at intervals along the length direction of the blade (200), and a bridge piece (130) is connected between every two adjacent annular pieces (110).

4. A method according to claim 3, wherein the blade body (210) comprises a maximum chord length location (214), the chord length of the maximum chord length location (214) being larger than the chord length elsewhere on the blade body (210);

in the step of providing a ring (110) to the blade body (210):

arranging one of the ring-shaped members (110) on one side of the maximum chord length position (214) in the length direction;

arranging another annular piece (110) on the other side of the maximum chord length position (214) in the length direction;

two adjacent ring-shaped members (110) on both sides of the maximum chord length position (214) in the length direction are connected by a bridge member (130).

5. A method according to claim 1, wherein the body portion (111) has a first end (111 a) and a second end (111 b) detachably connected to each other, and in the step of providing a ring shaped element (110) to the blade body (210):

disposing a ring (110) around a blade body (210) such that a first end (111 a) and a second end (111 b) are adjacent, connecting the first end (111 a) and the second end (111 b) with a connection to dispose the ring (110) to the blade body (210).

6. A vibration damping device (100) for damping vibrations of a blade (200) of a wind turbine generator set, the vibration damping device (100) comprising:

the annular piece (110) is provided with a body part (111) and a hollow space (112) which is formed by the body part (111) in a surrounding mode and is used for accommodating a part of the blade (200);

the buffer piece (120) is arranged on one side, away from the hollow space (112), of the body part (111), and the plurality of buffer pieces (120) are distributed on the annular piece (110) at intervals.

7. The vibration suppression device (100) according to claim 6,

the body part (111) has a first end (111 a) and a second end (111 b) detachably connected to each other;

the vibration suppressing device (100) further includes a connecting portion for connecting the first end (111 a) and the second end (111 b) to form the annular body portion (111).

8. The vibration suppressing device (100) as claimed in claim 6, wherein the number of said ring members (110) is two or more, and said two or more ring members (110) are arranged side by side along the length direction of said blades (200) to be arranged on said blades (200).

9. The vibration suppression device (100) according to claim 8, further comprising: a bridge member (130) for connecting two of the ring members (110) adjacent in a length direction of the blade (200).

10. The vibration damping device (100) according to claim 9, wherein said bridge members (130) are two or more, and said two or more bridge members (130) are arranged to be spaced apart along a chord direction of said blade (200).

11. The vibration suppressing device (100) as claimed in claim 6, wherein a plurality of said buffers (120) are distributed in rows and columns on the surface of said annular member (110), and the distance between two adjacent rows and/or two adjacent columns of said buffers (120) is 15 cm-25 cm.

12. A blade (200), comprising:

a blade body (210) having a vibration damping region (211);

a vibration damping device (100) according to any of claims 6 to 11, said ring-shaped element (110) of said vibration damping device (100) being arranged around said blade body (210) at said vibration damping region (211).

13. The blade (200) of claim 12, wherein the blade body (210) comprises a blade (200) and a blade root (212) spaced apart along the length thereof, the vibration suppressing region (211) is disposed adjacent to the blade tip (213), and the vibration suppressing region (211) extends along the length of the blade (200) by 1/3 to 1/2 of the length of the blade (200).

14. Blade (200) according to claim 12,

the annular piece (110) is adhered to the surface of the blade body (210);

or, the vibration damping device (100) further comprises a clamping component, the main body part (111) is provided with a first end (111 a) and a second end (111 b) which are detachably connected with each other, and the first end (111 a) and the second end (111 b) are connected with each other through the clamping component so that the main body part (111) surrounds the blade body (210);

or, the surface of the blade body (210) is convexly provided with a fixing part, and the ring piece (110) is fixedly connected to the blade body (210) through the fixing part.

15. The blade (200) of claim 12, wherein the number of the ring members (110) is two or more, and the two or more ring members (110) are arranged side by side along a length direction of the blade body (210).

16. The blade (200) of claim 15, wherein the blade body (210) has a maximum chord length location (214), the chord length of the maximum chord length location (214) is greater than the chord length of other portions of the blade body (210), at least two of the ring members (110) are spaced apart on either side of the maximum chord length location (214), and the ring members (110) on either side of the maximum chord length location (214) are connected to each other by a bridge member (130) extending along the length direction.

17. A wind park according to any of claims 12-16, comprising a blade (200) according to any of claims 12-16.