CN-122014491-A - Vibration suppression device, blade assembly and wind generating set

Abstract

The application relates to a vibration suppression device, a blade assembly and a wind generating set, wherein the vibration suppression device is used for a blade body and comprises a constraint assembly, the constraint assembly comprises a first constraint piece and a second constraint piece which are distributed at intervals, the first constraint piece and the second constraint piece can be sleeved on the blade body and are oppositely arranged and fixed with the blade body, the vibration suppression assembly is arranged between the first constraint piece and the second constraint piece and extends along a spiral path to be spirally wound on the blade body, the vibration suppression assembly comprises a vortex unit which extends along the spiral path, and the vortex unit comprises a spiral matching surface which is used for being in fit arrangement with the outer surface of the blade body. The application can reduce the vibration response of the incoming wind, has good vibration inhibiting effect, reduces the swing of the blade body under the action of the incoming wind, and ensures the safety of the blade body under different working conditions.

Inventors

• GAO YANG
• ZHANG GUOMING

Assignees

• 金风科技股份有限公司
• 北京金风科创风电设备有限公司
• 金风前沿技术（盐城）有限公司

Dates

Publication Date

20260512

Application Date

20260211

Claims (20)

1. 1. A vibration suppression device for a blade body, the vibration suppression device comprising: the constraint assembly comprises first constraint pieces and second constraint pieces which are distributed at intervals, and the first constraint pieces and the second constraint pieces can be sleeved on the blade body and are fixed with the blade body in a relative mode; the vibration suppression assembly is arranged between the first constraint piece and the second constraint piece, extends along a spiral path and is spirally wound on the blade body; The vibration suppression assembly comprises a vortex unit extending along the spiral path, wherein the vortex unit comprises a spiral matching surface, and the spiral matching surface is used for being attached to the outer surface of the blade body.
2. 2. The vibration suppression device according to claim 1, wherein a distance from one end of the turbulence unit away from the spiral matching surface to the spiral matching surface is h, and a width of the turbulence unit is b in a direction perpendicular to a spiral direction of the vibration suppression assembly, wherein b/h is more than or equal to 0.8 and less than or equal to 2.5.
3. 3. The vibration suppression apparatus according to claim 1, further comprising a flexible rope that matches the path of extension of the spoiler unit and is embedded in the spoiler unit arrangement.
4. 4. The vibration suppression apparatus according to claim 1, wherein the spoiler unit has a strip-like structure extending along the spiral path, and the spoiler unit has a polygonal cross-sectional shape perpendicular to its own extending direction.
5. 5. The vibration suppression apparatus according to claim 4, wherein the number of sides of the polygon is n, 3≤n≤6; And/or, the turbulence unit comprises a foaming material.
6. 6. The vibration suppression device according to claim 1, wherein the turbulence unit comprises a sharp corner portion arranged opposite to the spiral matching surface, and the included angle θ of the sharp corner portion ranges from 60 ° to 90 °.
7. 7. The vibration suppression device according to claim 1, wherein the ratio k/δ of the characteristic height k of the turbulence element to the local boundary layer thickness δ is in the range of 0.3 to 0.7.
8. 8. The vibration suppression device according to claim 1, wherein the vibration suppression assembly further comprises a plurality of flexible connection units, and the flexible connection units are connected between adjacent ones of the plurality of turbulence units.
9. 9. The vibration suppression apparatus according to claim 8, wherein the flexible connection unit comprises an elastic cord, a flexible sleeve, or a flexible connection strap.
10. 10. The vibration suppression apparatus according to claim 1, wherein a pitch of the plurality of spoiler units as a whole is a fixed pitch along a spiral direction of the vibration suppression assembly; Or the integral screw pitches of the plurality of turbulence units are in an increasing trend, wherein the increasing trend comprises one of gradual increase, section-by-section increase, gradual increase after being fixed unchanged, and gradual increase after being fixed unchanged.
11. 11. The vibration suppression device according to claim 1, further comprising a distance component, wherein the distance component is at least partially disposed between the first constraint member and the second constraint member, and along the arrangement direction of the first constraint member and the second constraint member, the distance component comprises a plurality of spacing portions distributed at intervals, the turbulence unit is sequentially matched with each spacing portion, and the distance component is used for being matched with the rear edge of the blade body and fixing the relative position of the blade body.
12. 12. Vibration suppression device according to claim 11, characterized in that the distance assembly comprises a plurality of spaced apart distance units and a connection between two adjacent distance units, each distance unit being provided with the limit part, in the direction of arrangement.
13. 13. The vibration suppression device according to claim 1, wherein the first restraining member has an annular structure, and the first restraining member is configured to be sleeved on a tip portion of the blade body.
14. 14. The vibration suppression apparatus of claim 13, wherein the first constraint comprises an annular body and a cushioning layer disposed within the annular body, the cushioning layer configured to be disposed in contact with the blade body.
15. 15. The vibration suppression device according to claim 1, wherein the second constraint member has a ring-shaped structure, the second constraint member is arranged on one side of the blade body facing away from the tip of the blade body in a sleeved mode, and the second constraint member is arranged in an openable mode in a self-annular mode.
16. 16. The vibration suppression apparatus of claim 15, further comprising an unlocking assembly comprising a securing member and a disconnect assembly disposed on the securing member, the second restraining member having the unlocking assembly disposed thereon, the securing member being coupled to the second restraining member, the disconnect assembly being configured to sever the second restraining member.
17. 17. The vibration suppression apparatus of claim 16 wherein said disconnect assembly includes a power source, a switch, and a heating element disposed in series, said heating element being connected to a second restraint for thermally fusing said second restraint; or the breaking assembly comprises a driving piece and a cutter, the driving piece drives the cutter to move, and a part of the second restraint piece is positioned on the moving path of the cutter so as to cut off the second restraint piece through the cutter.
18. 18. The vibration suppression apparatus of claim 17 wherein the number of disconnect assemblies is two or more, and two or more disconnect assemblies are each disposed on the mount.
19. 19. A blade assembly, comprising: A blade body; the vibration suppression apparatus according to any one of claims 1 to 18, wherein the first restraining member and the second restraining member are sleeved on the blade body and fixed relative to the blade body, and the vibration suppression assembly extends along a spiral path and is spirally wound on the blade body.
20. 20. The blade assembly of claim 19, wherein the blade body has a length L1 and the vibration suppression device has a length dimension L2 on the blade body, wherein 25% L2/L1% is less than or equal to 50%.

Description

Vibration suppression device, blade assembly and wind generating set Technical Field The application relates to the technical field of wind power, in particular to a vibration suppression device, a blade assembly and a wind generating set. Background Along with the rapid development of the wind generating set to the directions of large capacity, high tower and long blade, the length of a single blade breaks through hundreds of meters, and the structural flexibility of the wind generating set is obviously increased. In a plurality of links such as stacking, hoisting and no-load operation before grid connection, the blade body is in a complex flow field environment, and is extremely easy to generate structural vibration under the action of unsteady aerodynamic force. Such vibrations are mainly represented by Vortex induced vibrations (Vortex-induced vibration-Induced Vibration, VIV) and Stall induced vibrations (Stall-Induced Vibration, SIV), which are typical fluid induced vibration problems. The two types of vibration show fluid-structure coupling dynamics characteristics, namely interaction of incoming flow conditions, blade modal characteristics and damping level, so that vibration response has obvious uncertainty and danger. For the super-long flexible blade, the blade body of the super-long flexible blade can swing greatly in the field operation under the action of incoming wind, and the safety of the blade body under different working conditions such as stacking, hoisting and grid connection is seriously threatened. Disclosure of Invention The embodiment of the application provides a vibration suppression device, a blade assembly and a wind generating set, wherein the vibration suppression device can reduce the vibration response of incoming wind, has a good vibration suppression effect, reduces the swing of a blade body under the action of the incoming wind, and ensures the safety of the blade body under different working conditions. According to one embodiment of the application, the vibration suppression device comprises a constraint component, a vibration suppression component and a vibration suppression component, wherein the constraint component comprises a first constraint piece and a second constraint piece which are distributed at intervals, the first constraint piece and the second constraint piece can be sleeved on the blade body and are fixed relative to the blade body, the vibration suppression component is arranged between the first constraint piece and the second constraint piece and extends along a spiral path to be spirally wound on the blade body, the vibration suppression component comprises a vortex unit which is arranged along the spiral path, and the vortex unit comprises a spiral matching surface which is used for being in fit with the outer surface of the blade body. According to one aspect of the embodiment of the application, the distance from one end of the turbulent flow unit away from the spiral matching surface to the spiral matching surface is h, and the width of the turbulent flow unit is b in the direction perpendicular to the spiral direction of the vibration suppression assembly, wherein b/h is more than or equal to 0.8 and less than or equal to 2.5. According to an aspect of the embodiment of the application, the vibration suppressing device further comprises a flexible rope, which is matched with the extending path of the spoiler unit and is embedded in the spoiler unit. According to an aspect of the embodiment of the present application, the turbulence unit has a strip-like structure extending along the spiral path, and has a polygonal cross-sectional shape perpendicular to the extending direction thereof. According to one aspect of the embodiment of the application, the number of sides of the polygon is n, 3≤n≤6. And/or the turbulence unit comprises a foaming material. According to one aspect of the embodiment of the application, the turbulence unit comprises a sharp corner part which is arranged opposite to the spiral matching surface, and the included angle theta of the sharp corner part is in a range of 60-90 degrees. According to an aspect of the embodiment of the present application, the ratio k/δ of the characteristic height of the spoiler unit to the local boundary layer thickness is preferably in the range of 0.3 to 0.7. According to an aspect of the embodiment of the application, the vibration suppression assembly further comprises flexible connection units, the number of the turbulence units is multiple, and the flexible connection units are connected between adjacent turbulence units. According to an aspect of an embodiment of the application, the flexible connection unit comprises an elastic cord, a flexible sleeve or a flexible connection strip. According to one aspect of the embodiment of the application, the pitch of the whole plurality of turbulence units is a fixed pitch along the spiral direction of the vibration suppression assembly. Or the inte