Vibration suppression device for blade, blade assembly and wind turbine generator

Abstract

A vibration suppression device (10) for a blade, the vibration suppression device (10) comprising a carrier (11) and a spoiler (12). The carrier (11) is arranged around a reference axis (a), the reference axis (a) extending in a first direction (X), and the interior of the carrier (11) encloses an accommodating space capable of accommodating at least part of a blade (20). The spoiler (12) is in the shape of a flexible strip-shaped body, and the spoiler (12) is connected to the carrier and located on the side of the carrier (11) facing away from the accommodating space (13). The spoiler (12) can interfere with or prevent an interaction between entrained airflow layers, thereby suppressing periodic vortex shedding generated by the blade (20), and effectively reducing the vortex-induced vibration phenomenon of the blade (20). The spoiler (12) in the shape of the flexible strip-shaped body has a relatively significant flow-disturbing effect, and has a relatively prominent effect of suppressing the vortex-induced vibration phenomenon of the blade (20), thereby reducing the requirements for the carrier (11), and facilitating simplification of a structure of the vibration suppression device (10); and the spoiler (12) is made of a wide variety of materials, thereby reducing the cost of the vibration suppression device (10). Further comprised are a blade assembly (100) and a wind turbine generator.

Description

Blade vibration suppression device, blade assembly and wind turbine generator

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202410893595.1, filed on July 4, 2024, entitled “Blade vibration suppression device, blade assembly and wind turbine generator”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application belongs to the field of wind power technology, and particularly relates to a blade vibration suppression device, a blade assembly and a wind turbine generator. BACKGROUND

[0004] In recent years, China's wind power development has achieved remarkable development, with the continuous development of wind power technology, small and medium-sized blades have been difficult to meet the current demand, and long and flexible blades have become the future development trend. However, as the blade becomes longer, the chord length of the blade increases, the natural frequency of the blade decreases, and the problems become more and more prominent.

[0005] When the blade is in a non-working state such as storage, transportation and hoisting, it may be affected by wind and may appear vortex-induced vibration phenomenon. When the blade vortex-induced vibration occurs, it will cause great damage to the blade, reduce the service life of the blade, and even cause the blade to break. SUMMARY

[0006] The embodiments of the present application provide a blade vibration suppression device, a blade assembly and a wind turbine generator to reduce the vortex-induced vibration phenomenon of the blade in a non-working state, simplify the structure of the vibration suppression device and reduce the cost.

[0007] According to a first aspect of the present application, the present application provides a blade vibration suppression device, which comprises: a carrier, the carrier is arranged around a reference axis, the reference axis extends along a first direction, and the inside of the carrier encloses a containing space capable of containing at least part of a blade; and a disturbance member, the disturbance member is a flexible belt-shaped body, and the disturbance member is connected to the carrier and located on a side of the carrier away from the containing space.

[0008] In some embodiments, the vibration suppression device further comprises a support arranged in the containing space, the support comprises a first wall facing the carrier and a second wall arranged opposite to the first wall, the first wall is connected to the carrier, and the second wall is used to connect with an outer surface of the blade to support the carrier through the support.

[0009] In some embodiments, the carrier surrounds and covers the support; or the carrier extends spirally along the first direction around the reference axis, and the carrier is wound outside the support.

[0010] In some embodiments, the first wall has a circular or elliptical cross-section in a direction perpendicular to the first direction.

[0011] In some embodiments, the number of the supports is a plurality, and the plurality of supports are spaced apart along the first direction; the spacing distance between two adjacent supports is 2m-10m.

[0012] In some embodiments, the vibration suppression device further comprises a first fixing member, which is arranged around the outer periphery of the support and tightly fixes the support.

[0013] In some embodiments, the carrier is a cylinder around the reference axis.

[0014] In some embodiments, the number of the turbulence members is a plurality, and the plurality of turbulence members are spaced apart along the outer periphery of the carrier, each turbulence member extending along the first direction and being connected to the carrier; or, the number of the turbulence members is a plurality, each turbulence member extending along the radial direction of the carrier, one end of each turbulence member being connected to the carrier and the other end being suspended.

[0015] In some embodiments, the vibration suppression device further comprises a second fixing member, which is arranged around the outer periphery of the carrier and tightly fixes the carrier.

[0016] In some embodiments, the carrier spirally extends along the first direction around the reference axis.

[0017] In some embodiments, the turbulence member is provided with a rope passing hole, which penetrates the turbulence member along the length direction or the width direction of the turbulence member, the length direction and the width direction intersecting; the carrier is a flexible strip, and the carrier is threaded in the rope passing hole.

[0018] In some embodiments, the number of the carriers and the number of the turbulence members are both a plurality, at least one turbulence member is threaded on each carrier; and the plurality of carriers spirally surround the reference axis side by side and spaced apart.

[0019] In some embodiments, the vibration suppression device further comprises an anchor connected to one end of the carrier along the length direction of the anchor and capable of being fixedly installed on the blade, and the carrier is capable of being anchored on the blade through the anchor; and / or a plurality of limiters connected to different sections of the carrier and capable of being fixedly installed on the blade, the limiters being configured to limit the movement of the carrier relative to the blade along the first direction or the direction opposite to the first direction.

[0020] In some embodiments, the accommodation space is tapered along the first direction, and the height of the turbulence member in the radial direction of the carrier gradually decreases along the first direction.

[0021] In some embodiments, the carrier comprises a second peripheral wall facing away from the accommodation space, the number of the turbulence generators is multiple, and the multiple turbulence generators are uniformly distributed on the second peripheral wall; the height of the turbulence generators in the radial direction of the carrier is inversely related to the arrangement density of the turbulence generators.

[0022] In some embodiments, the turbulence generator comprises a flexible material, and the flexible material comprises at least one of a spring cloth, a polyester, a nylon, and a raw silk.

[0023] According to a second aspect of the present application, the embodiments of the present application further provide a blade assembly comprising a blade and the vibration suppression device according to any one of the embodiments of the present application, the carrier being arranged around the blade, and at least part of the blade along the length direction of the blade being located in the accommodation space.

[0024] In some embodiments, the vibration suppression device further comprises a support, the support being arranged around the blade, the carrier being arranged around or wound around the support, and the support filling at least part of the space between the blade and the carrier.

[0025] In some embodiments, the blade comprises a blade root portion and a blade tip portion arranged oppositely along the length direction of the blade; a first distance between one end of the vibration suppression device facing the blade root portion and the blade root portion is D1, a second distance between the other end of the vibration suppression device facing the blade tip portion and the blade root portion is D2, and the total length of the blade is L, wherein D1, D2, and L satisfy: 65%≤D1 / L≤75%, and 90%≤D2 / L≤98%.

[0026] According to a third aspect of the present application, the embodiments of the present application further provide a wind turbine generator comprising the blade assembly according to any one of the embodiments of the present application.

[0027] The vibration suppression device for the blade provided by the embodiments of the present application comprises a carrier and a turbulence generator. The carrier is arranged around a reference axis extending in a first direction, and the inside of the carrier forms an accommodation space. The turbulence generator is in the form of a flexible strip-shaped body and is capable of being deformed. The turbulence generator is connected to the carrier and located on the side of the carrier facing away from the accommodation space. When the vibration suppression device is used for the blade, the carrier can be arranged around the outside of at least part of the blade in a manner of surrounding or winding. The turbulence generator is located on the outside of the carrier facing away from the blade and is capable of being deformed under the action of wind or the like. The turbulence generator can interfere with or prevent the interaction between the airflow entrainment layers, thereby suppressing the periodic shedding vortex of the blade and effectively reducing the vortex-induced vibration phenomenon of the blade. The turbulence generator in the form of a flexible strip-shaped body has high flexibility and is very easy to deform, the turbulence effect is obvious, and the effect of suppressing the vortex-induced vibration phenomenon of the blade is more prominent. The turbulence generator in the form of a flexible strip-shaped body is also convenient to connect to the carrier, reduces the requirements on the carrier, and is conducive to simplifying the structure of the vibration suppression device. The turbulence generator in the form of a flexible strip-shaped body has a wide range of material selection, for example, a ribbon, a cloth strip, or the like, and is low in price, thereby reducing the cost of the vibration suppression device. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0029] Fig. 1 is a structural schematic diagram of a wind turbine provided by some embodiments of the present application.

[0030] Fig. 2 is a structural schematic diagram of a part of the wind turbine provided by some embodiments of the present application.

[0031] Fig. 3 is a structural schematic diagram of a vibration suppression device provided by some embodiments of the present application.

[0032] Fig. 4 is a sectional structural schematic diagram of the vibration suppression device shown in Fig. 3.

[0033] Fig. 5 is a structural schematic diagram of a part of the vibration suppression device shown in Fig. 2.

[0034] Fig. 6 is a structural schematic diagram of a part of the vibration suppression device shown in Fig. 5.

[0035] Fig. 7 is a structural schematic diagram of a part of the vibration suppression device provided by some other embodiments of the present application.

[0036] Fig. 8 is a structural schematic diagram of a part of the vibration suppression device provided by some other embodiments of the present application.

[0037] Fig. 9 is a structural schematic diagram of a spoiler of the vibration suppression device provided by some embodiments of the present application. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The articles 'a', 'an', and 'the' each followed by'some or more' or 'one or more' of an element are intended to include one or more articles of the described element and do not exclude other additional elements. The terms "comprises", "comprising", "includes", "including", "has", "having" and the like are inclusive and are used as equivalents of the term "consisting of".

[0040] Reference throughout this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments.

[0041] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0042] The term "and / or" in the application is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0043] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the application shown in the drawings, and the overall thickness, length and width of the integrated device are only exemplary and should not constitute any limitation on the application.

[0044] "Multiple" appearing in the application means two or more (including two).

[0045] The vibration suppression device for blades provided by the embodiments of the application can be applied to wind power blades, wind turbine generators and the like.

[0046] In order to better understand the present application, the blade vibration suppression device, the blade assembly and the wind turbine generator set according to the embodiments of the present application are described in detail below with reference to Figs. 1 to 7.

[0047] Fig. 1 is a structural schematic diagram of a wind turbine generator set according to some embodiments of the present application. Referring to Fig. 1, the wind turbine generator set according to the embodiments of the present application comprises a hub 30 and a blade 20 connected to the hub 30. Of course, the wind turbine generator set also comprises a tower 40, a nacelle 50 and a generator 60. The tower 40 is connected to a wind turbine foundation, the nacelle 50 is arranged at the top end of the tower 40, and the generator 60 is arranged in the nacelle 50. In some examples, the generator 60 can be located outside the nacelle 50, and of course, in some examples, the generator 60 can also be located inside the nacelle 50. The plurality of blades 20 and the hub 30 connected together can be referred to as a rotor. The rotor is connected to the rotating shaft of the generator 60 through the hub 30. When wind acts on the blades 20, the entire rotor 2 and the rotating shaft of the generator 60 are driven to rotate, so as to convert wind energy into electrical energy.

[0048] In recent years, the development of wind power in China has attracted worldwide attention. With the continuous development of wind power technology, small and medium-sized blades have been difficult to meet the current demand, and long and flexible blades have become the future development trend. However, as the blades become longer and the chord length of the blades increases, the natural frequency of the blades decreases, and the problems become more and more prominent. When the blade is in a non-working state such as storage, transportation and hoisting, the blade is in a complex flow field under the action of random wind, and periodic shedding vortices will be generated at the leading edge and trailing edge of the blade. The periodic shedding vortices will generate a periodic transverse force on the blade in the flow field, causing the blade to vibrate periodically. When the vortex shedding frequency is the same as the natural frequency of the blade, resonance phenomenon occurs, which significantly increases the amplitude of the blade, i.e. vortex-induced vibration. When the blade undergoes vortex-induced vibration, it will cause great damage to the blade, reduce the service life of the blade, and even cause the blade to break.

[0049] In view of this, the embodiments of the present application provide a blade vibration suppression device. The blade vibration suppression device comprises a carrier and a flexible strip-shaped disturbance member. The carrier can be wrapped around at least part of the outer surface of the blade in a surrounding or winding manner, and the flexible strip-shaped disturbance member can be deformed under the action of external forces such as wind. The flexible strip-shaped disturbance member can interfere with or weaken the interaction between the air entrainment layers, thereby suppressing the generation of periodic shedding vortices in the blade and effectively reducing the phenomenon of vortex-induced vibration of the blade. The flexible strip-shaped disturbance member has high flexibility and is very easy to deform, and the disturbance effect is obvious, so the effect of suppressing the phenomenon of vortex-induced vibration of the blade is more prominent. The flexible strip-shaped disturbance member is also easy to connect with the carrier, which reduces the requirements for the shape and structural strength of the carrier in many aspects, and is conducive to simplifying the structure of the vibration suppression device. The flexible strip-shaped disturbance member has a wide range of material selection, such as ribbons and cloth strips, which are low in price and reduce the cost of the vibration suppression device.

[0050] Fig. 2 is a schematic view of a structure of the vibration suppression device for the rear of the blade according to some embodiments of the present application, Fig. 3 is a schematic view of a structure of the vibration suppression device according to some embodiments of the present application, Fig. 4 is a schematic view of a cross-section structure of the vibration suppression device shown in Fig. 3, Fig. 5 is a schematic view of a partial structure of the vibration suppression device for the rear of the blade shown in Fig. 2, and Fig. 6 is a schematic view of a structure of the vibration suppression device shown in Fig. 5 with the carrier removed. Referring to Figs. 2 to 5, the vibration suppression device 10 according to some embodiments of the present application includes a carrier 11 and a spoiler 12. The carrier 11 is disposed around a reference axis a extending in a first direction X, and an inner portion of the carrier 11 encloses a receiving space 13 capable of receiving at least a portion of a blade 20. The spoiler 12 is in the form of a flexible band, and the spoiler 12 is connected to the carrier 11 and located on a side of the carrier 11 facing away from the receiving space 13.

[0051] The receiving space 13 can be a space with an open end, such as a cylindrical or columnar space, or an open space with a gap or a through hole around the end.

[0052] The spoiler 12 can be connected to the carrier 11 by suitable means such as sewing, gluing, stapling, or threading.

[0053] The spoiler 12 is made of a flexible material to allow it to deform.

[0054] The spoiler 12 is located on a side of the carrier 11 facing away from the receiving space 13, so that the spoiler 12 can float around the outer periphery of the blade 20 when the vibration suppression device 10 is used for the blade 20.

[0055] When the vibration suppression device 10 is used for the blade 20, the carrier 11 can be directly connected to the blade 20, or indirectly connected to the blade 20 through other structures.

[0056] When the vibration suppression device 10 is used for the blade 20, the first direction X can be parallel to the length direction of the blade 20.

[0057] When the vibration suppression device 10 is used for the blade 20, the carrier 11 can be wrapped around the outside of at least a portion of the blade 20 in a manner such as wrapping or winding. The spoiler 12 is located on the outside of the carrier 11 facing away from the blade 20, and can be deformed under the action of wind or other external forces. The spoiler 12 can interfere with or weaken the interaction between the air flow entrainment layers, thereby suppressing the periodic shedding vortex of the blade 20 and effectively reducing the vortex-induced vibration phenomenon of the blade 20.

[0058] The spoiler 12 in the form of a flexible strip has high flexibility and is easy to deform, and the spoiler effect is obvious, and the effect of suppressing vortex-induced vibration of the blade 20 is more prominent. The spoiler 12 in the form of a flexible strip is also convenient to connect with the carrier 11, which reduces the requirements for the shape and structural strength of the carrier 11 and is beneficial to simplify the structure of the vibration suppression device 10. The spoiler 12 in the form of a flexible strip has a wide range of material selection, such as ribbons and cloth strips, which are low in price and reduce the cost of the vibration suppression device 10.

[0059] In some embodiments, the spoiler 12 comprises a flexible material, which comprises at least one of spring silk, polyester, nylon, and raw silk.

[0060] The spoiler 12 can be made of one of spring silk, polyester, nylon, and raw silk, or a composite of two or more of them.

[0061] Spring silk, polyester, nylon, and raw silk all have high flexibility and strong deformation ability, and can adapt to the external environment for a long time, which improves the spoiler effect of the spoiler 12 and prolongs its service life.

[0062] In alternative embodiments, the material of the spoiler 12 can also be made of other flexible materials with high flexibility and strong adaptability.

[0063] The inventor realizes that the blade has a thin airfoil thickness, especially at the tip, which is similar to a flat plate structure, and a stagnation zone is easily formed when fluid flows through the blade. The fluid stagnation zone is a phenomenon that occurs when fluid encounters an obstacle in flow, which can cause the fluid flow to slow down or even stop. When the blade experiences fluid stagnation, the spoiler 12 will not effectively hinder vortex shedding.

[0064] To this end, in some embodiments, referring to FIGS. 4-6, the vibration suppression device 10 further comprises a support 14 disposed in the accommodation space 13, the support 14 comprising a first wall 142 facing the carrier 11 and a second wall 143 opposite the first wall 142, the first wall 142 being connected to the carrier 11, and the second wall 143 being configured to be connected to the outer surface of the blade 20 to support the carrier 11 through the support 14.

[0065] Preferably, the support 14 can further comprise a first portion 14a and a second portion 14b, and the vibration suppression device 10 is configured to be used for the blade 20, the first portion 14a and the second portion 14b being connected to the windward surface and the leeward surface of the blade 20 by abutting, bonding or other suitable means, respectively, and the first portion 14a and the second portion 14b can be connected by bonding, stapling, sewing or other suitable means. Thus, when the vibration suppression device 10 is in a non-use state, the first portion 14a and the second portion 14b can be stacked, reducing the occupied space.

[0066] Alternatively, the support 14 can be an annular structure integrally formed, or can be formed by winding a flexible sheet structure around the blade 20 at least one turn and connecting the sheet structure by suitable means such as bonding, stapling, sewing, etc.

[0067] The support 14 is provided with a clearance 141 capable of accommodating at least part of the blade 20, the clearance 141 extending through the support 14 along the first direction X. A first wall 142 of the support 14 facing away from the clearance 141 is connected to the carrier 11 to prop up the carrier 11 by the support 14. When the support 14 comprises the first portion 14a and the second portion 14b, the clearance 141 is formed by the first portion 14a and the second portion 14b.

[0068] When the vibration suppression device 10 is used for the blade 20, at least part of the blade 20 is in the clearance 141, and the support 14 is arranged around the blade 20. The first inner peripheral wall of the support 14 facing the clearance 141 can be attached to the outer surface of the blade 20.

[0069] The first wall 142 of the support 14 can be connected to the carrier 11 by suitable means such as abutting, bonding, etc.

[0070] The embodiments of the present application change the external shape of the carrier 11 by arranging the support 14 in the accommodation space 13, which can support the carrier 11 outwardly. When the vibration suppression device 10 is used for the blade 20, the support 14 is arranged between the carrier 11 and the blade 20 to prop up the carrier 11, which improves the flat plate-like external shape structure of the blade 20. Compared with the arrangement mode in which the carrier 11 directly surrounds the blade 20, the support 14 can make the external shape of the carrier 11 more full, effectively reducing the possibility of occurrence of the fluid stagnation region or preventing the fluid stagnation region from being too large, thereby ensuring the effect of the vibration suppression device 10 on suppressing the shedding vortex of the blade 20.

[0071] In addition, the support 14 can be connected to the outside of the blade 20, which has high stability and large support strength, and improves the structural stability of the carrier 11.

[0072] In some embodiments, the first wall 142 has a circular or elliptical cross section in a direction perpendicular to the first direction X.

[0073] It can be understood that the circular or elliptical cross section of the first wall 142 includes the case where the cross section of the first wall 142 is a regular circle or ellipse, and also includes the case where the cross section of the first wall 142 is approximately a circle or ellipse.

[0074] Since the carrier 11 is connected to the first wall 142, the external shape of the carrier 11 is consistent with the shape of the first wall 142. The first wall 142 with a circular or elliptical cross-section can support the carrier 11 to have a cylindrical or elliptical external shape, and can reduce the resistance generated by the carrier 11 to the airflow, thereby preventing the occurrence of the fluid stagnation zone to the greatest extent.

[0075] In some embodiments, referring to FIG. 4, the carrier 11 surrounds and covers the support 14.

[0076] When the vibration suppression device 10 is used for the blade 20, the support 14 can be installed on the outer surface of the blade 20, and then the carrier 11 can be spirally wound around the outer periphery of the support 14.

[0077] Exemplarily, the carrier 11 can be a one-piece cylindrical structure, which is sleeved on the outside of the support 14. As another example, the carrier 11 can also be formed by winding a flexible sheet structure at least one turn around the support 14 and then connecting the flexible sheet structure by suitable means such as bonding, stapling, sewing, etc.

[0078] FIG. 7 is a schematic view of part of the structure of the vibration suppression device according to some other embodiments of the present application when used for a blade. For ease of observation and understanding, the spoiler 12 of the vibration suppression device is hidden in FIG. 7. In some other embodiments, referring to FIG. 7, the carrier 11 spirally extends around the reference axis a in the first direction X, and the carrier 11 is wound around the outside of the support 14.

[0079] When the vibration suppression device 10 is used for the blade 20, the support 14 can be installed on the outer surface of the blade 20, and then the carrier 11 can be spirally wound around the outer periphery of the support 14. The structure of the carrier 11 is simpler and more lightweight, and the installation and removal of the carrier 11 are more convenient.

[0080] In some embodiments, the number of supports 14 is multiple, and the multiple supports 14 are arranged at intervals in the first direction X. The interval distance between the adjacent two supports 14 is 2m-10m.

[0081] Alternatively, the interval distance between the adjacent two supports 14 can be 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9m or 10m, etc.

[0082] The interval distance between the adjacent two supports 14 can be related to the material properties of the support 14. For example, the flexibility of the support 14 is inversely related to the interval distance between the adjacent two supports 14. The higher the flexibility of the support 14, the easier the deformation, and the smaller the interval distance between the adjacent two supports 14. The lower the flexibility of the support 14, the less the deformation, and the larger the interval distance between the adjacent two supports 14.

[0083] If the interval distance between two adjacent support members 14 is too small, the number of support members 14 required is large, which not only makes assembly complicated, but also makes the weight heavy, which can have an adverse effect on the blade 20; if the interval distance between two adjacent support members 14 is too large, the area of the carrier 11 between the two adjacent support members 14 can not be supported and collapse, thereby affecting the shedding vortex effect of the vibration suppression device 10.

[0084] The embodiment of the present application can reduce the weight of the vibration suppression device 10 to some extent by arranging a plurality of spaced support members 14, and can also ensure that the vibration suppression device 10 has good shedding vortex effect.

[0085] In some embodiments, the vibration suppression device further comprises a first fixing member, which is arranged around the outer periphery of the support member 14 and tightly fixes the support member 14.

[0086] Optionally, the first fixing member comprises at least one of a clamping member, a binding belt, and a fixing rope.

[0087] The first fixing member can improve the installation stability of the support member 14 and reduce the possibility of the support member 14 falling off the blade 20. Moreover, the first fixing member also facilitates installation and disassembly, improves the efficiency of installing the vibration suppression device 10 to the blade 20 and disassembling it from the blade 20, and does not affect the structure and performance of the blade 20 itself.

[0088] In alternative embodiments, the support member 14 can also be formed into a ring structure by means of bonding, stapling, sewing, etc., so as to be stably sleeved on the outside of the blade 20.

[0089] In some embodiments, referring to FIG. 3, the carrier 11 is a cylinder body around the reference axis a.

[0090] Exemplarily, the carrier 11 can be an integrally formed cylindrical structure, and when the vibration suppression device 10 is used for the blade 20, the carrier 11 is sleeved on the outside of the blade 20. As another example, the carrier 11 can also be formed by winding a flexible sheet structure at least one turn around the blade 20 and then connecting by means of bonding, stapling, sewing, etc.

[0091] The material of the carrier 11 comprises a flexible material, so as to be able to more closely wrap the blade 20 or the support member 14. Exemplarily, the carrier 11 can comprise a canvas made of cotton fabric or hemp fabric, and the carrier 11 can also be made of rubber or other flexible materials.

[0092] In some embodiments, the vibration suppression device 10 further comprises a second fixing member, which is arranged around the outer periphery of the carrier 11 and tightly fixes the carrier 11.

[0093] Optionally, the second fixing member comprises at least one of a hoop, a binding belt, and a fixing rope.

[0094] The second fixing member can improve the mounting stability of the carrier 11 and reduce the possibility of the carrier 11 falling off the blade 20. Moreover, the second fixing member also facilitates mounting and dismounting, improves the efficiency of mounting the vibration suppression device 10 to the blade 20 and dismounting the vibration suppression device 10 from the blade 20, and does not affect the structure and performance of the blade 20 itself.

[0095] In alternative embodiments, the carrier 11 can also be formed into a ring structure by means of bonding, stapling, sewing, or the like, so as to be stably sleeved outside the blade 20.

[0096] In some embodiments, referring to FIG. 3, the number of the turbulence members 12 is multiple, the multiple turbulence members 12 are arranged at intervals along the outer periphery of the carrier 11, and each turbulence member 12 extends along the first direction X and is connected to the carrier 11. This arrangement reduces the number of the turbulence members 12 and improves the mounting efficiency of mounting the vibration suppression device 10 to the blade 20.

[0097] Optionally, the multiple turbulence members 12 are uniformly distributed along the outer periphery of the carrier 11.

[0098] The length direction of the turbulence member 12 is parallel to the first direction X, one side of the turbulence member 12 along the width direction is connected to the carrier 11, and the other side is arranged in a suspended manner, and the length direction and the width direction of the turbulence member 12 intersect. Optionally, the length direction and the width direction of the turbulence member 12 are perpendicular.

[0099] The length of the turbulence member 12 is substantially the same as the length of the carrier 1 along the first direction X, so as to as far as possible to prolong the length of the turbulence member 12.

[0100] FIG. 8 is a schematic diagram of a partial structure of the vibration suppression device for the blade according to yet some embodiments of the present application. In other embodiments, referring to FIG. 8, the number of the turbulence members 12 is multiple, each turbulence member 12 extends along the radial direction of the carrier 11, one end of each turbulence member 12 is connected to the carrier 11, and the other end is arranged in a suspended manner. This arrangement shortens the length of a single turbulence member 12, expands the selectable range of the turbulence member 12, for example, the turbulence member 12 can use a rag, and further reduces the cost of the vibration suppression device 10.

[0101] The carrier 11 comprises a second outer periphery wall 111 facing away from the accommodation space 13, and optionally, the multiple turbulence members 12 are uniformly distributed on the second outer periphery wall 111.

[0102] The length direction of the turbulence member 12 is perpendicular to the first direction X, one end of the turbulence member 12 along the length direction is connected to the carrier 11, and the multiple turbulence members 12 can be arranged in a radial manner.

[0103] In some other embodiments, referring to FIG. 5, the carrier 11 spirally extends along the first direction X around the reference axis a.

[0104] Exemplarily, the carrier 11 spirally winds outside the blade 20.

[0105] As another example, the vibration suppression device 10 further comprises a support 14, and the carrier 11 spirally winds outside the support 14.

[0106] When the vibration suppression device 10 is used for the blade 20, the carrier 11 can be spirally wound outside the periphery of the blade 20 or the support 14, and the structure of the carrier 11 is simpler and more lightweight, and the installation and dismounting of the carrier 11 are more convenient.

[0107] FIG. 9 is a structural schematic view of the spoiler of the vibration suppression device according to some embodiments of the present application. In some embodiments, referring to FIG. 9, the spoiler 12 is provided with a rope passing hole 121, the rope passing hole 121 penetrates through the spoiler 12 along the length direction or the width direction of the spoiler 12, and the length direction and the width direction of the spoiler 12 intersect. Optionally, the length direction and the width direction of the spoiler 12 are perpendicular. The carrier 11 is a flexible strip-shaped body, and the carrier 11 is arranged in the rope passing hole 121.

[0108] Exemplarily, the rope passing hole 121 is arranged at one side of the spoiler 12 along the width direction of the spoiler 12, and the rope passing hole 121 penetrates through the spoiler 12 along the length direction of the spoiler 12.

[0109] As another example, the rope passing hole 121 is arranged at one end of the spoiler 12 along the width direction of the spoiler 12, and the rope passing hole 121 penetrates through the spoiler 12 along the width direction of the spoiler 12.

[0110] The carrier 11 is a flexible strip-shaped body, so that the carrier 11 can be deformed and spirally wound outside the blade 20 or the support 14.

[0111] The carrier 11 is arranged in the rope passing hole 121 of the spoiler 12, which simplifies the connection operation between the carrier 11 and the spoiler 12 and improves the connection reliability of the two.

[0112] Before the vibration suppression device 10 is used for the blade 20, the carrier 11 is arranged in the rope passing hole 121 of the spoiler 12, and then the carrier 11 is spirally wound outside the blade 20 or the support 14, which improves the convenience of installation and dismounting of the vibration suppression device 10.

[0113] In some embodiments, the carrier 11 and the spoiler 12 are both multiple, and at least one spoiler 12 is arranged on each carrier 11. The multiple carriers 11 are spirally arranged around the reference axis a side by side and at intervals.

[0114] Exemplarily, the carrier 11 is provided with one spoiler 12, and the length of the spoiler 12 is consistent with the length of the carrier 11.

[0115] As another example, the carrier 11 is provided with multiple spoilers 12, and the multiple spoilers 12 are arranged in sequence along the length direction of the carrier 11, and the length of the single spoiler 12 is shortened.

[0116] When the vibration suppression device 10 is used for the blade 20, multiple carriers 11 can be simultaneously spirally wound on the outside of the blade 20 or the support 14, and the installation efficiency of the vibration suppression device 10 is improved. The multiple carriers 11 are arranged at intervals, and the spoilers 12 can be prevented from being too densely distributed and intertwined together, and the spoiler effect is affected.

[0117] Exemplarily, the number of the carriers 11 can be 2-5.

[0118] In some embodiments, referring to FIG. 7, the vibration suppression device 10 further comprises an anchor 17, the anchor 17 is connected to one end of the carrier 11 along the length direction of the carrier 11, and the anchor 17 can be fixedly installed on the blade 20, and the carrier 11 can be anchored to the blade 20 through the anchor 17.

[0119] The anchor 17 can pass through the carrier 11, and after the anchor 17 is installed on the blade 20, the installation of the carrier 11 and the blade 20 is realized.

[0120] Optionally, the anchor 17 can be a fastener such as a rivet or a screw. The anchor 17 can be installed on the blade 20 in a detachable manner such as screw connection, adhesion, clamping, and the like, and is fixed relative to the blade 20.

[0121] When the vibration suppression device 10 is installed on the blade 20, one end of the carrier 11 can be fixed to the blade 20 through the anchor 17, and then the carrier 11 is spirally wound, the anchor 17 is convenient for determining the approximate position of the carrier 11, and the winding operation of the carrier 11 is also facilitated.

[0122] In some embodiments, the vibration suppression device 10 further comprises multiple limiters 18, the multiple limiters 18 are connected to different sections of the carrier 11, and the multiple limiters 18 can be fixedly installed on the blade 20, and the multiple limiters 18 are configured to limit the movement of the carrier 11 relative to the blade 20 along the first direction X or the direction opposite to the first direction X. The limiter 18 can prevent the carrier 11 from sliding off the blade 20 or generating a large displacement relative to the blade 20.

[0123] Optionally, the limiter 18 can be a fastener such as a rivet or a screw. The limiter 18 can be installed on the blade 20 in a detachable manner such as screw connection, adhesion, clamping, and the like, and is fixed relative to the blade 20.

[0124] The connection between the limiting member 18 and the carrier 11 includes but is not limited to abutting, inserting, bonding, etc. For example, the limiting member 18 can abut with a certain section of the carrier 11 along the first direction X or the direction opposite to the first direction X.

[0125] In some embodiments, the accommodation space 13 is tapered along the first direction X, and the height of the spoiler 12 in the radial direction of the carrier 11 gradually decreases along the first direction X. It can be understood that the first direction X is a one-way direction along the arrow shown in the figure.

[0126] The accommodation space 13 is tapered along the first direction X, in other words, the cross-sectional area of the accommodation space 13 taken along the direction perpendicular to the first direction X gradually decreases along the first direction X.

[0127] Since the accommodation space 13 is used to accommodate at least part of the blade 20. The size of the accommodation space 13 matches the chord length of the blade 20. The chord length of the blade 20 usually gradually changes from the blade root portion to the blade tip portion in a gradually decreasing manner, so that the accommodation space 13 is tapered along the first direction X, and the first direction X is the direction from the blade root portion to the blade tip portion.

[0128] The embodiments of the present application set the height of the spoiler 12 to gradually decrease along the first direction X, which can make the height of the spoiler 12 positively related to the chord length of the blade 20. That is, the height of the spoiler 12 corresponding to the region with longer chord length of the blade 20 is higher, and the height of the spoiler 12 corresponding to the region with shorter chord length of the blade 20 is lower. In this way, the spoiler 12 can not only play a better spoiler role, but also avoid the possibility of entanglement due to too long spoiler 12.

[0129] Optionally, the height of the spoiler 12 can be 0.1 times to 0.5 times of the chord length of the blade 20 at the position of the spoiler 12.

[0130] In some alternative embodiments, the height of the spoiler 12 in the radial direction of the carrier 11 is uniform.

[0131] In some embodiments, the carrier 11 includes a second outer peripheral wall 111 facing away from the accommodation space 13, and the number of spoilers 12 is multiple, and the multiple spoilers 12 are uniformly distributed on the second outer peripheral wall 111. The height of the spoiler 12 in the radial direction of the carrier 11 is inversely related to the arrangement density of the spoiler 12.

[0132] In other words, the greater the arrangement density of the spoiler 12, the smaller the height of the spoiler 12 in the radial direction of the carrier 11; the smaller the arrangement density of the spoiler 12, the greater the height of the spoiler 12 in the radial direction of the carrier 11.

[0133] The more densely the spoilers 12 are arranged, the smaller the gap between adjacent spoilers 12. The airflow in the regions of the blade 20 can be disturbed by the plurality of densely arranged spoilers 12. If the height of the spoilers 12 is long, the plurality of spoilers 12 can easily intertwine, affecting the spoiler effect.

[0134] The more sparsely the spoilers 12 are arranged, the larger the gap between adjacent spoilers 12. By appropriately increasing the height of the spoilers 12, the deformation degree and the disturbable area of each spoiler 12 can be increased, so that the airflow in the gap between adjacent spoilers 12 can be disturbed, ensuring a better spoiler effect.

[0135] According to a second aspect of the present application, referring to FIG. 2, the embodiments of the present application further provide a blade assembly 100, which comprises a blade 20 and a vibration suppression device 10 according to any of the embodiments of the present application. The carrier 11 is arranged around the blade 20, and at least part of the blade 20 along the length direction thereof is located in the accommodation space 13. The spoilers 12 are located on the outer side of the carrier 11 away from the blade 20.

[0136] Since the vibration suppression device 10 of the embodiments of the present application can effectively suppress the periodic shedding vortex of the blade 20 by the flexible strip-shaped spoilers 12, the vortex-induced vibration phenomenon of the blade 20 is reduced, the service life of the blade 20 is prolonged, and the possibility of damage of the blade 20 in a non-working state is reduced. Moreover, the structure of the vibration suppression device 10 is simplified, and the cost of the vibration suppression device 10 is reduced.

[0137] In some embodiments, referring to FIG. 4, the vibration suppression device 10 further comprises a support 14, which surrounds the blade 20, and the carrier 11 surrounds or winds around the support 14, and the support 14 fills at least part of the space between the blade 20 and the carrier 11.

[0138] For example, the support 14 can fill the entire space between the blade 20 and the carrier 11 to stably support each position of the carrier 11.

[0139] For another example, the support 14 can also only fill part of the space between the blade 20 and the carrier 11.

[0140] The support 14 can support the carrier 11 outwardly, avoiding the carrier 11 from adhering to the outer surface of the blade 20, thereby improving the external shape of the carrier 11. Compared with the arrangement mode in which the carrier 11 directly surrounds the blade 20, the support 14 can make the external shape of the carrier 11 more full, effectively reducing the possibility of occurrence of a fluid stagnation region or preventing the fluid stagnation region from being too large, thereby improving the effect of the vibration suppression device 10 in suppressing the shedding vortex of the blade 20.

[0141] In some embodiments, the blade 20 comprises a blade root portion 20a and a blade tip portion 20b oppositely arranged along the length of the blade 20. A first distance between the blade root portion 20a and an end of the vibration suppression device 10 facing the blade root portion 20a is D1, a second distance between the blade root portion 20a and another end of the vibration suppression device 10 facing the blade tip portion 20b is D2, and a total length of the blade 20 is L, wherein D1, D2 and L satisfy: 65%≤D1 / L≤75% and 90%≤D2 / L≤98%.

[0142] The blade root portion 20a is a portion of the blade 20 connected to the hub 30, i.e. the portion closest to the hub 30. The blade tip portion 20b is a position of the blade 20 away from the hub 30. The vibration suppression device 10 is arranged on a section of the blade 20 between the blade root portion 20a and the blade tip portion 20b.

[0143] The inventors have found through simulation tests that the blade 20 is more prone to vortex-induced vibration phenomenon in a section between a position 65% to 75% of the total length of the blade 20 from the blade root portion 20a to the blade tip portion 20b. Therefore, the vibration suppression device 10 is arranged on the outer periphery of the section in the embodiments of the present application, wherein a first distance between the blade root portion 20a and an end of the vibration suppression device 10 facing the blade root portion 20a is 65% to 75% of the total length of the blade 20, so that the vortex-induced vibration phenomenon of the blade 20 can be more targetedly suppressed.

[0144] The blade tip portion 20b is approximately a tip end. If the vibration suppression device 10 is installed on the blade tip portion 20b, the installation stability is affected and the operation is inconvenient. Therefore, the vibration suppression device 10 is not arranged on the outer periphery of the blade tip portion 20b, but is spaced apart from the blade tip portion 20b by a certain distance in the embodiments of the present application, so that the installation stability and convenience of the vibration suppression device 10 are improved.

[0145] According to a third aspect of the present application, the embodiments of the present application further provide a wind turbine generator set comprising the blade assembly 100 according to any of the embodiments of the present application.

[0146] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements shall be encompassed in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A vibration suppression device for a blade, comprising: a carrier disposed around a reference axis extending in a first direction, an inner portion of the carrier enclosing a receiving space capable of receiving at least a portion of the blade; and a spoiler in a flexible strip shape, the spoiler being connected to the carrier and located on a side of the carrier facing away from the receiving space. 2.The vibration suppression device according to claim 1, further comprising: a support disposed in the receiving space, the support comprising a first wall facing the carrier and a second wall disposed opposite to the first wall, the first wall being connected to the carrier, and the second wall being configured to be connected to an outer surface of the blade to support the carrier by the support. 3.The vibration suppression device according to claim 2, wherein: the carrier surrounds and covers the support; or the carrier spirally extends along the first direction around the reference axis, and the carrier is wound outside the support. 4.The vibration suppression device according to claim 2, wherein: in a direction perpendicular to the first direction, a cross section of the first wall is circular or elliptical. 5.The vibration suppression device according to claim 2, wherein: a plurality of the supports are disposed at intervals along the first direction; and a distance between two adjacent supports is 2m to 10m. 6.The vibration suppression device according to claim 2, further comprising: a first fixing member disposed around an outer periphery of the support and tightly fixing the support. 7.The vibration suppression device according to claim 1, wherein: the carrier is in a cylindrical shape around the reference axis. 8.The vibration suppression device according to claim 7, wherein: a plurality of the spoilers are disposed at intervals along an outer periphery of the carrier, each of the spoilers extending along the first direction and being connected to the carrier; or a plurality of the spoilers extend along a radial direction of the carrier, each of the spoilers having one end connected to the carrier and the other end being suspended. 9.The vibration suppression device according to claim 7, further comprising: a second fixing member disposed around an outer periphery of the carrier and tightly fixing the carrier. 10.The vibration suppression device according to claim 1, wherein: the carrier spirally extends along the first direction around the reference axis. 11.The vibration suppression device according to claim 10, wherein: the spoiler is provided with a rope passing hole penetrating the spoiler along a length direction or a width direction of the spoiler, the length direction and the width direction intersecting each other; and the carrier is in a flexible strip shape, and the carrier is threaded in the rope passing hole. 12.The vibration suppression device according to claim 11, wherein: a plurality of the carriers and a plurality of the spoilers are provided, at least one of the spoilers being threaded on each of the carriers; and the plurality of the carriers spirally surround the reference axis side by side and at intervals. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 13. The vibration suppression device of claim 11, further comprising: an anchor connected to an end of the carrier along a length of the carrier, and configured to be fixedly installed on the blade, the carrier being anchorable to the blade via the anchor; and / or a plurality of limiters connected to different sections of the carrier, and configured to be fixedly installed on the blade, the limiters being configured to limit movement of the carrier relative to the blade in the first direction or a direction opposite to the first direction.

14. The vibration suppression device of claim 1, wherein: the accommodation space is tapered in the first direction, and a height of the spoiler in a radial direction of the carrier gradually decreases in the first direction.

15. The vibration suppression device of claim 1, wherein: the carrier comprises a second peripheral wall facing away from the accommodation space, and a number of the spoilers is a plurality, the plurality of the spoilers being uniformly distributed on the second peripheral wall; a height of the spoiler in a radial direction of the carrier is inversely related to a density of arrangement of the spoiler.

16. The vibration suppression device of claim 1, wherein: the spoiler comprises a flexible material, the flexible material comprising at least one of a spring cloth, a polyester, a nylon, and a raw silk.

17. A blade assembly, comprising: a blade; and the vibration suppression device of any one of claims 1-16, the carrier being disposed around the blade, at least a portion of the blade along a length of the blade being located in the accommodation space.

18. The blade assembly of claim 17, wherein: the vibration suppression device further comprises a support, the support being wrapped around the blade, the carrier being wrapped around or wound around the support, the support filling at least a portion of a space between the blade and the carrier.

19. The blade assembly of claim 17, wherein: the blade comprises a root portion and a tip portion oppositely disposed along a length of the blade; a first distance between an end of the vibration suppression device facing the root portion and the root portion is D1, a second distance between another end of the vibration suppression device facing the tip portion and the root portion is D2, and a total length of the blade is L, wherein D1, D2, and L satisfy: 65%≤D1 / L≤75%, 90%≤D2 / L≤98%.

20. A wind turbine generator, comprising the blade assembly of any one of claims 17-19. ​

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