Vibration suppression device for blade, blade assembly and wind generating set

Abstract

The invention discloses a vibration suppression device for a blade, a blade assembly and a wind generating set. The vibration suppression device comprises a bearing part and a spoiler. The bearing part is arranged around a reference axis, the reference axis extends in the first direction, and a containing space capable of containing at least part of the blades is defined by the interior of the bearing part. The spoiler is a flexible belt-shaped body, and the spoiler is connected to the bearing part and located on the side, away from the containing space, of the bearing part. The spoiler can interfere or stop the interaction between the airflow entrainment layers, so that periodic falling vortexes generated by the blades are inhibited, and the vortex-induced vibration phenomenon of the blades is effectively reduced. The turbulence effect of the turbulence piece in the shape of the flexible belt body is obvious, the effect of restraining the vortex-induced vibration phenomenon of the blade is outstanding, the requirement for a bearing piece is lowered, and the structure of the vibration restraining device is simplified. And the material of the spoiler is wide, so that the cost of the vibration suppression device is reduced.

Description

Technical Field

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

[0002] In recent years, my country's wind power development has achieved remarkable development. With the continuous development of wind power technology, small and medium-sized blades can no longer meet the current demand, and long and flexible blades have become the future development trend. However, as the blades become longer and longer, the blade chord length continues to increase, and the blade natural frequency decreases, the problems brought about are becoming more and more prominent.

[0003] When the blades are in non-working state such as storage, transportation, hoisting, etc., they may be affected by wind and vortex-induced vibration may occur. When vortex-induced vibration occurs in the blades, it will cause great damage to the blades, reduce the life of the blades, and even cause the blades to break. Summary of the invention

[0004] The embodiments of the present application provide a vibration suppression device for blades, a blade assembly and a wind turbine generator set to reduce the vortex-induced vibration phenomenon when the blades are in a non-working state, simplify the structure of the vibration suppression device and reduce its cost.

[0005] According to the first aspect of the present application, the present application provides a vibration suppression device for a blade, which includes: a carrier, the carrier is arranged around a reference axis, the reference axis extends along a first direction, the interior of the carrier is enclosed to form a accommodating space that can accommodate at least part of the blade; and a spoiler, the spoiler is a flexible belt-shaped body, the spoiler is connected to the carrier and is located on the side of the carrier away from the accommodating space.

[0006] In some embodiments, the vibration suppression device also includes a support member, which is arranged in the accommodating space, and the support member includes 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 to the outer surface of the blade so as to support the carrier through the support member.

[0007] In some embodiments, the carrier surrounds and covers the support member; or, the carrier extends spirally along a first direction around a reference axis, and the carrier is wound around the outside of the support member.

[0008] In some embodiments, along a direction perpendicular to the first direction, a cross-section of the first wall is circular or elliptical.

[0009] In some embodiments, there are multiple support members, and the multiple support members are spaced apart along the first direction; the spacing distance between two adjacent support members is 2m to 10m.

[0010] In some embodiments, the vibration suppression device further includes a first fixing member, which is disposed around the outer circumference of the supporting member and tightens and fixes the supporting member.

[0011] In some embodiments, the carrier is in the form of a cylinder surrounding a reference axis.

[0012] In some embodiments, there are multiple spoilers, and the multiple spoilers are arranged at intervals along the outer periphery of the carrier, and each spoiler extends along the first direction and is connected to the carrier; or, there are multiple spoilers, and each spoiler extends radially along the carrier, one end of each spoiler is connected to the carrier, and the other end is suspended.

[0013] In some embodiments, the vibration suppression device further includes a second fixing member, which is disposed around the outer circumference of the supporting member and tightens and fixes the supporting member.

[0014] In some embodiments, the carrier extends helically in a first direction about a reference axis.

[0015] In some embodiments, the spoiler is provided with a rope threading hole, which passes through the spoiler along the length direction or the width direction of the spoiler, and the length direction and the width direction intersect; the supporting member is a flexible strip body, and the supporting member is passed through the rope threading hole.

[0016] In some embodiments, there are multiple carriers and spoilers, and each carrier is provided with at least one spoiler; the multiple carriers are arranged side by side and spaced apart and spirally surround the reference axis.

[0017] In some embodiments, the vibration suppression device also includes: an anchor connected to one end of the support member along its own length direction and capable of being fixedly mounted on the blade, and the support member can be anchored to the blade through the anchor; and / or, a plurality of limit members connected to different sections of the support member and capable of being fixedly mounted on the blade, and the limit members are configured to limit the movement of the support member relative to the blade along a first direction or a direction opposite to the first direction.

[0018] In some embodiments, the accommodating space gradually shrinks along the first direction, and the height of the spoiler in the radial direction of the carrier gradually decreases along the first direction.

[0019] In some embodiments, the carrier includes a second peripheral wall facing away from the accommodating space, there are multiple spoilers, and the spoilers are evenly distributed on the second peripheral wall; the radial height of the spoiler in the carrier is inversely correlated with the arrangement density of the spoiler.

[0020] In some embodiments, the spoiler comprises a flexible material comprising at least one of pongee, polyester, nylon, and raw silk.

[0021] According to the second aspect of the present application, an embodiment of the present application also provides a blade assembly, which includes a blade and a vibration suppression device provided according to any embodiment of the present application. The support member is arranged around the blade, and at least a portion of the blade along its own length direction is located in the accommodating space.

[0022] In some embodiments, the vibration suppression device further comprises a support member, the support member surrounds the blade, the carrier surrounds or wraps around the support member, and the support member fills at least a portion of the space between the blade and the carrier.

[0023] In some embodiments, the blade includes a blade root portion and a blade tip portion which are arranged opposite to each other 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 a total length of the blade is L, wherein D1, D2 and L satisfy: 65%≤D1 / L≤75%, 90%≤D2 / L≤98%.

[0024] According to the third aspect of the present application, an embodiment of the present application further provides a wind turbine generator set, which includes a blade assembly provided by any embodiment of the present application.

[0025] The vibration suppression device for blades provided in the embodiment of the present application includes a bearing and a spoiler. The bearing is arranged around a reference axis extending along a first direction, and the interior of the bearing is enclosed to form a receiving space. The spoiler is a flexible belt-shaped body that can be deformed. The spoiler is connected to the bearing and is located on the side of the bearing away from the receiving space. When the vibration suppression device is used for a blade, the bearing can surround the outside of at least part of the blade in a manner such as wrapping or winding. The spoiler is located on the outer side of the bearing away from the blade, and can be deformed under external effects such as wind force. The spoiler can interfere with or prevent the interaction between the airflow entrainment layers, thereby suppressing the blade from generating periodic shedding vortices, and effectively reducing the vortex-induced vibration phenomenon of the blade. The spoiler in the form of a flexible belt-shaped body has high flexibility, is very easy to deform, has a relatively obvious spoiling effect, and has a more prominent effect in suppressing the vortex-induced vibration phenomenon of the blade. The spoiler in the form of a flexible belt-shaped body is also easy to connect with the bearing, which reduces the requirements for the bearing and is conducive to simplifying the structure of the vibration suppression device. The spoiler in the form of a flexible strip can be made of a wide variety of materials, such as streamers, cloth strips, etc., which are inexpensive and reduce the cost of the vibration suppression device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the structure of a wind turbine generator set provided in some embodiments of the present application.

[0028] Figure 2It is a schematic diagram of the structure of the vibration suppression device provided in some embodiments of the present application after being used for blades.

[0029] Figure 3 It is a schematic diagram of the structure of the vibration suppression device provided in some embodiments of the present application.

[0030] Figure 4 yes Figure 3 A schematic cross-sectional structure diagram of the vibration suppression device shown.

[0031] Figure 5 yes Figure 2 The vibration suppression device shown is a schematic diagram of the partial structure behind the blade.

[0032] Figure 6 yes Figure 5 Schematic diagram of the structure after the bearing components are hidden.

[0033] Figure 7 It is a partial structural schematic diagram of the vibration suppression device provided in other embodiments of the present application after being used for the blade.

[0034] Figure 8 It is a partial structural schematic diagram of the vibration suppression device provided in some other embodiments of the present application after being used for the blade.

[0035] Fig. 9 It is a schematic diagram of the structure of a spoiler of a vibration suppression device provided in some embodiments of the present application. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0038] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0042] The term "plurality" used in the present application refers to two or more (including two).

[0043] The blade vibration suppression device provided in the embodiment of the present application can be applied to wind turbine blades, wind turbine generator sets, etc.

[0044] In order to better understand this application, Figures 1 to 7 The blade vibration suppression device, blade assembly and wind turbine generator set according to the application embodiments are described in detail.

[0045] Figure 1 is a schematic diagram of the structure of a wind turbine generator set provided in some embodiments of the present application, referring to Figure 1The embodiment of the present application provides a wind turbine generator set, including a hub 30 and blades 20, wherein the blades 20 are connected to the hub 30. Of course, the wind turbine generator set also includes a tower 40, a nacelle 50, and a generator 60. The tower 40 is connected to the wind turbine foundation, the nacelle 50 is arranged at the top of the tower 40, and the generator 60 is arranged in the nacelle 50. In some examples, the generator 60 may be located outside the nacelle 50. Of course, in some examples, the generator 60 may also be located inside the nacelle 50. Among them, the whole after the multiple blades 20 are connected to the hub 30 can be called an impeller. The impeller is connected to the rotating shaft of the generator 60 through its hub 30. When the wind acts on the blades 20, the rotating shaft of the entire impeller 2 and the generator 60 is driven to rotate to convert wind energy into electrical energy.

[0046] In recent years, my country's wind power development has achieved remarkable development. With the continuous development of wind power technology, small and medium-sized blades can no longer meet current needs, and long and flexible blades have become the future development trend. However, as the blades become longer and longer, the blade chord length continues to increase, and the blade natural frequency decreases, the problems caused are becoming more and more prominent. When the blades are in non-working states such as storage, transportation, and hoisting, the blades are in a complex flow field under the action of random wind, and periodic shedding vortices will be generated on the leading and trailing edges of the blades. The periodic shedding vortices will produce periodic lateral forces on the blades placed in the flow field, causing the blades to vibrate periodically. When the vortex shedding frequency is the same as the blade natural frequency, resonance will occur, which will significantly increase the blade amplitude, that is, vortex-induced vibration. When the blades undergo vortex-induced vibration, it will cause a great deal of damage to the blades, reduce the life of the blades, and even cause the blades to break.

[0047] In view of this, the embodiment of the present application provides a vibration suppression device for blades, which, by setting a bearing member and a spoiler in the form of a flexible belt, enables the bearing member to surround the outside of at least part of the blade in a manner such as circling or winding, and enables the spoiler to deform under external effects such as wind, and the spoiler can interfere with or weaken the interaction between the airflow entrainment layers, thereby suppressing the blade from generating periodic shedding vortices, and effectively reducing the vortex-induced vibration phenomenon of the blade. The spoiler in the form of a flexible belt has high flexibility, is very easy to deform, has a more obvious flow disturbance effect, and has a more prominent effect of suppressing the vortex-induced vibration phenomenon of the blade. The spoiler in the form of a flexible belt is also easy to connect with the bearing member, which reduces the requirements on the shape and structural strength of the bearing member, and is conducive to simplifying the structure of the vibration suppression device. The spoiler in the form of a flexible belt can be made of a wide range of materials, such as streamers, cloth strips, etc., which are inexpensive and reduce the cost of the vibration suppression device.

[0048] Figure 2 is a schematic diagram of the structure of the vibration suppression device provided in some embodiments of the present application after being used for a blade, Figure 3 is a schematic diagram of the structure of a vibration suppression device provided in some embodiments of the present application, Figure 4 yes Figure 3 The schematic cross-sectional structure diagram of the vibration suppression device shown in FIG. Figure 5 yes Figure 2 The vibration suppression device shown is a schematic diagram of the partial structure after the blade. Figure 6 yes Figure 5 The structural diagram after the bearing components are hidden. Figures 2 to 5 The vibration suppression device 10 provided in the embodiment of the present application includes a bearing member 11 and a spoiler 12. The bearing member 11 is arranged around a reference axis a, and the reference axis a extends along a first direction X. The interior of the bearing member 11 is enclosed to form an accommodation space 13 capable of accommodating at least part of the blade 20. The spoiler 12 is a flexible belt-shaped body, and the spoiler 12 is connected to the bearing member 11 and is located on a side of the bearing member 11 away from the accommodation space 13.

[0049] The accommodation space 13 may be a cylindrical, columnar or other space with only one end open, or may be an open space with one end open and having gaps or through holes around it.

[0050] The spoiler 12 can be connected to the carrier 11 by sewing, bonding, stapling, threading or other suitable methods.

[0051] The material of the spoiler 12 includes a flexible material so that it can be deformed.

[0052] The spoiler 12 is located on a side of the carrier 11 facing away from the accommodating space 13 , so that the spoiler 12 can float on the outer periphery of the blade 20 when the vibration suppression device 10 is used on the blade 20 .

[0053] When the vibration suppression device 10 is used on a blade 20 , the support member 11 may be directly connected to the blade 20 , or may be indirectly connected to the blade 20 through other structures.

[0054] When the vibration suppression device 10 is used on the blade 20 , the first direction X may be parallel to the length direction of the blade 20 .

[0055] When the vibration suppression device 10 is used for the blade 20, the carrier 11 can surround the outside of at least part of the blade 20 in a manner of wrapping, winding, etc. The spoiler 12 is located on the outer side of the carrier 11 away from the blade 20, and can be deformed under external forces such as wind force. The spoiler 12 can interfere with or weaken the interaction between the airflow entrainment layers, thereby suppressing the blade 20 from generating periodic shedding vortices, and effectively reducing the vortex-induced vibration phenomenon of the blade 20.

[0056] The spoiler 12 in the form of a flexible strip has high flexibility, is very easy to deform, has a relatively obvious spoiler effect, and has a relatively prominent effect of suppressing the vortex-induced vibration phenomenon of the blade 20. The spoiler 12 in the form of a flexible strip is also easy to connect with the carrier 11, which reduces the requirements on the shape and structural strength of the carrier 11, and is conducive to simplifying the structure of the vibration suppression device 10. The spoiler 12 in the form of a flexible strip can be made of a wide range of materials, such as streamers, cloth strips, etc., which are inexpensive and reduce the cost of the vibration suppression device 10.

[0057] In some embodiments, the spoiler 12 includes a flexible material including at least one of pongee, polyester, nylon, and raw silk.

[0058] The spoiler 12 can be made of one of the materials selected from the group consisting of pongee, polyester, nylon and raw silk, or a composite of two or more of these materials.

[0059] Pongee, polyester, nylon and raw silk are all highly flexible, have strong deformation capabilities, and can adapt to the external environment for a long time, thereby improving the spoiler effect of the spoiler 12 and extending its service life.

[0060] In an alternative embodiment, the spoiler 12 may also be made of other flexible materials with high flexibility and strong adaptability.

[0061] The inventors have realized that the blade airfoil is relatively thin, especially the blade tip, which is similar to a flat plate structure, and a stagnation zone is easily formed when the fluid flows through the blade. The fluid stagnation zone is a phenomenon formed when the fluid encounters an obstacle during flow, which causes the fluid flow to slow down or even stop. When the blade has fluid stagnation, the spoiler 12 will not have a significant effect in preventing vortex shedding.

[0062] To this end, in some embodiments, reference Figures 4 to 6 The vibration suppression device 10 also includes a support member 14, which is arranged in the accommodating space 13. The support member 14 includes a first wall 142 facing the carrier 11 and a second wall 143 arranged opposite to the first wall 142. The first wall 142 is connected to the carrier 11, and the second wall 143 is used to connect with the outer surface of the blade 20 so as to support the carrier 11 through the support member 14.

[0063] Preferably, the support member 14 may further include a first portion 14a and a second portion 14b. When the vibration suppression device 10 is used for the blade 20, the first portion 14a and the second portion 14b are respectively connected to the windward side and the leeward side of the blade 20 by abutment, bonding or other suitable means, and the first portion 14a and the second portion 14b may be connected by suitable means such as bonding, binding, sewing, etc. Thus, when the vibration suppression device 10 is not in use, the first portion 14a and the second portion 14b may be stacked, thereby reducing the occupied space.

[0064] Alternatively, the support member 14 may be an integrally formed annular structure, or may be a flexible sheet structure that is wrapped around the blade 20 at least once and then connected by a suitable method such as bonding, binding, sewing, etc.

[0065] The support member 14 is provided with a clearance opening 141 capable of accommodating at least part of the blades 20, and the clearance opening 141 penetrates the support member 14 along the first direction X. A first wall 142 of the support member 14 facing away from the clearance opening 141 is connected to the carrier 11, so that the carrier 11 is supported by the support member 14. When the support member 14 includes a first portion 14a and a second portion 14b, the clearance opening 141 is formed by enclosing the first portion 14a and the second portion 14b.

[0066] When the vibration suppression device 10 is used for the blade 20, at least part of the blade 20 is in the clearance opening 141, and the support member 14 is arranged around the blade 20. The first inner peripheral wall of the support member 14 facing the clearance opening 141 can fit the outer surface of the blade 20.

[0067] The first wall 142 of the support member 14 can be connected to the carrier 11 by abutting, bonding or other suitable means.

[0068] In the embodiment of the present application, a support member 14 is arranged in the accommodating space 13, and the support member 14 can support the carrier 11 outward, thereby changing the external shape of the carrier 11. When the vibration suppression device 10 is used for the blade 20, the support member 14 is located between the carrier 11 and the blade 20, propping up the carrier 11, and improving the flat plate-like structure of the blade 20. Compared with the arrangement in which the carrier 11 directly surrounds the blade 20, the support member 14 can make the external shape of the carrier 11 fuller, effectively reducing the possibility of the occurrence of a fluid stagnation zone or preventing the fluid stagnation zone from being too large, thereby ensuring the effect of the vibration suppression device 10 in suppressing the blade 20 from generating a shedding vortex.

[0069] Furthermore, the support member 14 can be connected to the outside of the blade 20 , which has higher stability and greater supporting strength, thereby improving the structural stability of the bearing member 11 .

[0070] In some embodiments, along a direction perpendicular to the first direction X, a cross-section of the first wall 142 is circular or elliptical.

[0071] It can be understood that the cross-section of the first wall 142 being circular or elliptical includes the cross-section of the first wall 142 being a regular circle or ellipse, and also includes the cross-section of the first wall 142 being approximately circular or elliptical.

[0072] Since the carrier 11 is connected to the first wall 142, the outer 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 prop up the carrier 11 into a cylindrical or elliptical cylindrical outer shape, which can reduce the resistance of the carrier 11 to the airflow, thereby preventing the occurrence of fluid stagnation zone to the greatest extent.

[0073] In some embodiments, reference Figure 4 The bearing member 11 surrounds and covers the supporting member 14 .

[0074] When the vibration suppression device 10 is used for the blade 20 , the support member 14 may be first installed on the outer surface of the blade 20 , and then the bearing member 11 may be surrounded around the outer periphery of the support member 14 .

[0075] Exemplarily, the carrier 11 may be an integrally formed cylindrical structure, which is sleeved outside the support 14. As another example, the carrier 11 may also be formed by a flexible sheet structure wrapped around the support 14 at least once and then connected by a suitable method such as bonding, binding, sewing, etc.

[0076] Figure 7 This is a partial structural diagram of the vibration suppression device provided in some other embodiments of the present application after being used for a blade. For the convenience of observation and understanding, Figure 7 The spoiler 12 of the vibration suppression device is hidden in FIG. Figure 7 The carrier 11 extends spirally along the first direction X around the reference axis a, and the carrier 11 is wound around the outside of the support 14 .

[0077] When the vibration suppression device 10 is used for the blade 20, the support member 14 can be first installed on the outer surface of the blade 20, and then the carrier 11 is spirally wound around the outer periphery of the support member 14. The structure of the carrier 11 is simpler and lighter, and the installation and disassembly of the carrier 11 are relatively convenient.

[0078] In some embodiments, there are multiple support members 14 , and the multiple support members 14 are spaced apart along the first direction X. The spacing distance between two adjacent support members 14 is 2 m to 10 m.

[0079] Optionally, the interval distance between two adjacent support members 14 may be 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9m or 10m, etc.

[0080] The spacing distance between two adjacent support members 14 may be related to the material properties of the support members 14. For example, the flexibility of the support members 14 is inversely correlated with the spacing distance between two adjacent support members 14. The higher the flexibility of the support members 14, the easier it is to deform, and the smaller the spacing distance between two adjacent support members 14; the lower the flexibility of the support members 14, the less likely it is to deform, and the larger the spacing distance between two adjacent support members 14.

[0081] If the spacing distance between two adjacent support members 14 is too small, a large number of support members 14 are required, which is not only cumbersome to assemble but also heavy, which may have an adverse effect on the blades 20; if the spacing distance between two adjacent support members 14 is too large, the area of ​​the support member 11 between the two adjacent support members 14 may not be supported and collapse, thereby affecting the vortex shedding effect of the vibration suppression device 10.

[0082] The embodiment of the present application can reduce the weight of the vibration suppression device 10 to a certain extent by providing a plurality of spaced support members 14 , and can also ensure that the vibration suppression device 10 has a good vortex shedding effect.

[0083] In some embodiments, the vibration suppression device further includes a first fixing member, which is disposed around the outer circumference of the support member 14 and tightens and fixes the support member 14 .

[0084] Optionally, the first fixing member includes at least one of a tightening member, a binding belt, and a fixing rope.

[0085] 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 from the blade 20. In addition, the first fixing member is also easy to install and remove, which improves the efficiency of installing the vibration suppression device 10 on the blade 20 and removing it from the blade 20, without affecting the structure and performance of the blade 20 itself.

[0086] In an alternative embodiment, the support member 14 may also be formed into a ring-shaped structure by bonding, binding, sewing, etc., so as to be stably sleeved on the outside of the blade 20 .

[0087] In some embodiments, reference Figure 3 The carrier 11 is in the form of a cylinder surrounding the reference axis a.

[0088] For example, the carrier 11 may be an integrally formed cylindrical structure, and when the vibration suppression device 10 is used on the blade 20, the carrier 11 is sleeved on the outside of the blade 20. As another example, the carrier 11 may also be formed by wrapping the blade 20 at least once with a flexible sheet structure and then connecting it by a suitable method such as bonding, binding, sewing, etc.

[0089] The material of the carrier 11 includes a flexible material so that it can more closely wrap the blade 20 or the support 14. For example, the carrier 11 may include a canvas made of cotton fabric or linen fabric, and the carrier 11 may also be made of rubber or other flexible materials.

[0090] In some embodiments, the vibration suppression device 10 further includes a second fixing member, which is disposed around the outer circumference of the supporting member 11 and tightens and fixes the supporting member 11 .

[0091] Optionally, the second fixing member includes at least one of a tightening member, a binding belt, and a fixing rope.

[0092] The second fixing member can improve the installation stability of the bearing member 11 and reduce the possibility of the bearing member 11 falling off the blade 20. In addition, the second fixing member is also convenient for installation and removal, which improves the efficiency of installing the vibration suppression device 10 on the blade 20 and removing it from the blade 20, without affecting the structure and performance of the blade 20 itself.

[0093] In an alternative embodiment, the carrier 11 may also be formed into an annular structure by bonding, binding, sewing, etc., so as to be stably sleeved on the outside of the blade 20 .

[0094] In some embodiments, reference Figure 3 , there are multiple spoilers 12, and the multiple spoilers 12 are arranged at intervals along the outer periphery of the carrier 11, and each spoiler 12 extends along the first direction X and is connected to the carrier 11. This arrangement reduces the number of spoilers 12 and improves the installation efficiency of the vibration suppression device 10 to the blade 20.

[0095] Optionally, a plurality of spoilers 12 are evenly distributed along the periphery of the carrier 11 .

[0096] The length direction of the spoiler 12 is parallel to the first direction X. One side of the spoiler 12 along its width direction is connected to the carrier 11, and the other side is suspended. The length direction and width direction of the spoiler 12 intersect. Optionally, the length direction and width direction of the spoiler 12 are perpendicular.

[0097] The length of the spoiler 12 is substantially the same as the length of the carrier 1 along the first direction X, so as to extend the length of the spoiler 12 as much as possible.

[0098] Figure 8 2 is a partial structural diagram of a vibration suppression device provided in some embodiments of the present application after being used for a blade. Figure 8There are multiple spoilers 12, each spoiler 12 extends in the radial direction of the carrier 11, one end of each spoiler 12 is connected to the carrier 11, and the other end is suspended. This arrangement shortens the length of a single spoiler 12 and expands the range of options for the spoiler 12. For example, the spoiler 12 can use a rag, which further reduces the cost of the vibration suppression device 10.

[0099] The carrier 11 includes a second peripheral wall 111 facing away from the accommodating space 13 . Optionally, a plurality of spoilers 12 are evenly distributed on the second peripheral wall 111 .

[0100] The length direction of the spoiler 12 is perpendicular to the first direction X. One end of the spoiler 12 along the length direction is connected to the carrier 11 . The plurality of spoilers 12 may be arranged radially.

[0101] In other embodiments, referring to Figure 5 , the carrier 11 extends helically in a first direction X around a reference axis a.

[0102] By way of example, the carrier 11 is helically wound around the outside of the blade 20 .

[0103] As another example, the vibration suppression device 10 further includes a support member 14 , and the bearing member 11 is spirally wound on the outside of the support member 14 .

[0104] When the vibration suppression device 10 is used for the blade 20, the bearing member 11 can be spirally wound around the outer periphery of the blade 20 or the support member 14. The structure of the bearing member 11 is simpler and lighter, and the installation and removal of the bearing member 11 are more convenient.

[0105] Fig. 9 is a schematic diagram of the structure of the spoiler of the vibration suppression device provided in some embodiments of the present application. Fig. 9 The spoiler 12 is provided with a rope threading hole 121, which passes through the spoiler 12 along the length direction or width direction of the spoiler 12, and the length direction and width direction of the spoiler 12 intersect. Optionally, the length direction and width direction of the spoiler 12 are perpendicular. The carrier 11 is a flexible strip body, and the carrier 11 is passed through the rope threading hole 121.

[0106] Exemplarily, the rope threading hole 121 is provided at one side of the spoiler 12 along the width direction of the spoiler 12 , and the rope threading hole 121 passes through the spoiler 12 along the length direction of the spoiler 12 .

[0107] As another example, the rope threading hole 121 is provided at one end of the spoiler 12 along the width direction of the spoiler 12 , and the rope threading hole 121 passes through the spoiler 12 along the width direction of the spoiler 12 .

[0108] The carrier 11 is a flexible strip, so that the carrier 11 can be deformed and spirally wound around the blade 20 or the outside of the support 14 .

[0109] The bearing member 11 is inserted into the rope threading hole 121 of the spoiler 12 , which simplifies the connection operation between the bearing member 11 and the spoiler 12 and improves the connection reliability between the two.

[0110] Before the vibration suppression device 10 is used on the blade 20, the bearing member 11 is first inserted into the rope threading hole 121 of the spoiler 12, and then the bearing member 11 is spirally wound around the blade 20 or the outside of the support member 14, thereby improving the convenience of installation and disassembly of the vibration suppression device 10.

[0111] In some embodiments, there are multiple carriers 11 and spoilers 12, and each carrier 11 is provided with at least one spoiler 12. The multiple carriers 11 are arranged side by side and spaced apart in a spiral manner around the reference axis a.

[0112] Exemplarily, a spoiler 12 is provided on the carrier 11 , and the length of the spoiler 12 is consistent with the length of the carrier 11 .

[0113] As another example, a plurality of spoilers 12 are disposed on the carrier 11 , and the plurality of spoilers 12 are arranged in sequence along the length direction of the carrier 11 , thereby shortening the length of a single spoiler 12 .

[0114] When the vibration suppression device 10 is used on the blade 20, multiple bearings 11 can be spirally wound around the blade 20 or the outside of the support member 14 at the same time, thereby improving the installation efficiency of the vibration suppression device 10. Multiple bearings 11 are arranged at intervals to prevent the spoilers 12 from being too densely distributed and entangled together, thereby affecting the spoiler effect.

[0115] Exemplarily, the number of the carriers 11 may be 2 to 5.

[0116] In some embodiments, reference Figure 7 The vibration suppression device 10 further includes an anchor 17 , which is connected to one end of the bearing member 11 along its length direction and can be fixedly mounted on the blade 20 . The bearing member 11 can be anchored to the blade 20 through the anchor 17 .

[0117] The anchor 17 may pass through the carrier 11 . After the anchor 17 is installed on the blade 20 , the installation of the carrier 11 and the blade 20 is achieved.

[0118] Optionally, the anchor 17 may be a fastener such as a rivet, a screw, etc. The anchor 17 may be installed on the blade 20 in a detachable manner such as screw connection, bonding, or clamping, and may be fixed relative to the blade 20 .

[0119] 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 by 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 also for the winding operation of the carrier 11.

[0120] In some embodiments, the vibration suppression device 10 further includes a plurality of limit members 18, the plurality of limit members 18 are connected to different sections of the carrier 11, and can be fixedly mounted on the blade 20, and the plurality of limit members 18 are configured to limit the movement of the carrier 11 relative to the blade 20 along the first direction X or in a direction opposite to the first direction X. The limit members 18 can prevent the carrier 11 from sliding off the blade 20 or from being displaced significantly relative to the blade 20.

[0121] Optionally, the stopper 18 may be a fastener such as a rivet, a screw, etc. The stopper 18 may be installed on the blade 20 in a detachable manner such as screw connection, bonding, or clamping, and may be fixed relative to the blade 20 .

[0122] The connection between the limiting member 18 and the carrier 11 includes but is not limited to abutment, insertion, bonding, etc. For example, the limiting member 18 may abut against a certain section of the carrier 11 along the first direction X or a direction opposite to the first direction X.

[0123] In some embodiments, the accommodation space 13 gradually shrinks 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 single direction along the arrow shown in the figure.

[0124] The accommodation space 13 tapers along the first direction X. In other words, a cross-sectional area of ​​the accommodation space 13 taken along a direction perpendicular to the first direction X gradually decreases along the first direction X.

[0125] 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 decreases from the blade root to the blade tip, so the accommodation space 13 gradually decreases along the first direction X, and the first direction X is the direction from the blade root to the blade tip.

[0126] In the embodiment of the present application, the height of the spoiler 12 is set to gradually decrease along the first direction X, so that the height of the spoiler 12 is positively correlated with the chord length of the blade 20. That is, the height of the spoiler 12 corresponding to the area with a longer chord length of the blade 20 is higher; the height of the spoiler 12 corresponding to the area with a shorter chord length of the blade 20 is lower. As a result, the spoiler 12 can not only play a better spoiling role, but also avoid the possibility of entanglement caused by the spoiler 12 being too long.

[0127] Optionally, the height of the spoiler 12 may be 0.1 to 0.5 times the chord length of the blade 20 where the spoiler 12 is located.

[0128] In some alternative embodiments, the height of the spoiler 12 in the radial direction of the carrier 11 is uniform.

[0129] In some embodiments, the carrier 11 includes a second peripheral wall 111 away from the accommodating space 13, and there are multiple spoilers 12, which are evenly distributed on the second peripheral wall 111. The height of the spoiler 12 in the radial direction of the carrier 11 is inversely correlated with the arrangement density of the spoiler 12.

[0130] In other words, the greater the arrangement density of the spoilers 12 , the smaller the radial height of the spoilers 12 of the carrier 11 ; and the smaller the arrangement density of the spoilers 12 , the greater the radial height of the spoilers 12 of the carrier 11 .

[0131] The denser the arrangement of the spoilers 12, the smaller the gaps between adjacent spoilers 12. A plurality of densely distributed spoilers 12 can produce a disturbing effect on the airflow in each area of ​​the blade 20. If the gaps between adjacent spoilers 12 are small, if the height of the spoilers 12 is long, the plurality of spoilers 12 are easily entangled together, affecting the spoiler effect.

[0132] The more sparsely the spoilers 12 are arranged, the larger the gaps between adjacent spoilers 12. By appropriately increasing the height of the spoilers 12, the degree of deformation and the disturbable area of ​​each spoiler 12 can be increased, thereby disturbing the airflow in the gaps between adjacent spoilers 12, ensuring a better spoiling effect.

[0133] According to the second aspect of the present application, referring to Figure 2 The embodiment of the present application further provides a blade assembly 100, which includes a blade 20 and a vibration suppression device 10 according to any embodiment of the present application. The bearing member 11 is arranged around the blade 20, and at least part of the blade 20 along its own length direction is located in the accommodation space 13. The spoiler 12 is located on the outer side of the bearing member 11 away from the blade 20.

[0134] Since the vibration suppression device 10 of the embodiment of the present application can effectively suppress the blade 20 from generating periodic shedding vortices through the flexible belt-shaped spoiler 12, the vortex-induced vibration phenomenon of the blade 20 is reduced, the service life of the blade 20 is extended, and the possibility of damage to the blade 20 in a non-working state is reduced. In addition, the structure of the vibration suppression device 10 is simplified, and the cost of the vibration suppression device 10 is reduced.

[0135] In some embodiments, reference Figure 4The vibration suppression device 10 further includes a support member 14 , which surrounds the blade 20 , and the carrier 11 surrounds or wraps around the support member 14 , and the support member 14 fills at least a portion of the space between the blade 20 and the carrier 11 .

[0136] Exemplarily, the support member 14 may fill the entire space between the blade 20 and the carrier 11 to stably support various positions of the carrier 11 .

[0137] As another example, the support member 14 may also fill only a portion of the space between the blade 20 and the carrier 11 .

[0138] The support member 14 can support the carrier 11 outward to prevent the carrier 11 from fitting the outer surface of the blade 20, thereby improving the outer shape of the carrier 11. Compared with the arrangement of the carrier 11 directly surrounding the blade 20, the support member 14 can make the outer shape of the carrier 11 fuller, effectively reducing the possibility of the occurrence of the fluid stagnation zone or preventing the fluid stagnation zone from being too large, thereby improving the effect of the vibration suppression device 10 in suppressing the blade 20 from generating a shedding vortex.

[0139] In some embodiments, the blade 20 includes a blade root portion 20a and a blade tip portion 20b that are arranged opposite to each other along the length direction of the blade 20. A first distance between one end of the vibration suppression device 10 facing the blade root portion 20a and the blade root portion 20a is D1, a second distance between the other end of the vibration suppression device 10 facing the blade tip portion 20b and the blade root portion 20a is D2, and the total length of the blade 20 is L, wherein D1, D2 and L satisfy: 65%≤D1 / L≤75%, 90%≤D2 / L≤98%.

[0140] The blade root 20a is the portion where the blade 20 is connected to the hub 30, that is, the portion closest to the hub 30. The blade tip 20b is the position of the blade 20 away from the hub 30. The vibration suppression device 10 is disposed on the section of the blade 20 between the blade root 20a and the blade tip 20b.

[0141] The inventor found through simulation tests that the blade 20 is more likely to generate vortex-induced vibration in the section between the position of 65% to 75% of the total length of the blade root 20a and the blade tip 20b. To this end, the embodiment of the present application sets the vibration suppression device 10 on the periphery of this section, wherein the first distance between the end of the vibration suppression device 10 facing the blade root 20a and the blade root 20a is 65% to 75% of the total length of the blade 20, which can more specifically suppress the vortex-induced vibration of the blade 20.

[0142] The blade tip 20b is similar to a tip, and if the vibration suppression device 10 is installed on the blade tip 20b, it will not only affect the installation stability, but also be inconvenient to operate. For this reason, the vibration suppression device 10 of the embodiment of the present application is not arranged on the periphery of the blade tip 20b, but is spaced a certain distance from the blade tip 20b, thereby improving the installation stability and convenience of the vibration suppression device 10.

[0143] According to the third aspect of the present application, an embodiment of the present application further provides a wind turbine generator set, which includes the blade assembly 100 provided in any embodiment of the present application.

[0144] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A vibration suppression device for a blade, characterized in that: include: A carrier, the carrier is arranged around a reference axis, the reference axis extends along a first direction, and the interior of the carrier is enclosed to form an accommodation space capable of accommodating at least part of the blade; as well as The spoiler is in the form of a flexible strip, connected to the carrier and located at a side of the carrier away from the accommodating space.

2. The vibration suppression device according to claim 1, characterized in that: Also includes: A support member is arranged in the accommodating space, and the support member includes a first wall facing the bearing member and a second wall arranged opposite to the first wall, the first wall is connected to the bearing member, and the second wall is used to connect with the outer surface of the blade to support the bearing member through the support member.

3. The vibration suppression device according to claim 2, characterized in that: The carrier surrounds and covers the support member; or The carrier extends spirally around the reference axis in the first direction, and the carrier is wound around the outside of the support.

4. The vibration suppression device according to claim 2, characterized in that: Along 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, characterized in that: There are multiple support members, and the multiple support members are arranged at intervals along the first direction; The spacing distance between two adjacent support members is 2m to 10m.

6. The vibration suppression device according to claim 2, characterized in that: The vibration suppression device also includes a first fixing member, which is arranged around the outer circumference of the supporting member and tightens and fixes the supporting member.

7. The vibration suppression device according to claim 1, characterized in that: The bearing member is in the form of a cylinder surrounding the reference axis.

8. The vibration suppression device according to claim 7, characterized in that: There are multiple spoilers, and the multiple spoilers are arranged at intervals along the outer circumference of the carrier, and each spoiler extends along the first direction and is connected to the carrier; or There are multiple spoilers, each of which extends in the radial direction of the bearing member, one end of each spoiler is connected to the bearing member, and the other end is suspended.

9. The vibration suppression device according to claim 7, characterized in that: The vibration suppression device further comprises a second fixing member, which is arranged around the outer circumference of the bearing member and fastens and fixes the bearing member.

10. The vibration suppression device according to claim 1, characterized in that: The carrier extends helically about the reference axis in the first direction.

11. The vibration suppression device according to claim 10, characterized in that: The spoiler is provided with a rope threading hole, and the rope threading hole passes through the spoiler along the length direction or the width direction of the spoiler, and the length direction and the width direction intersect; The bearing member is a flexible strip-shaped body and is inserted into the rope threading hole.

12. The vibration suppression device according to claim 11, characterized in that: There are multiple carriers and spoilers, and each carrier is provided with at least one spoiler; A plurality of the carriers are arranged side by side and spaced apart and spirally surround the reference axis.

13. The vibration suppression device according to claim 11, characterized in that: Also includes: An anchoring piece, connected to one end of the bearing member along its length direction and capable of being fixedly mounted on the blade, wherein the bearing member can be anchored to the blade through the anchoring piece; and / or A plurality of limit members are connected to different sections of the support member and can be fixedly mounted on the blade, and the limit members are configured to limit the movement of the support member relative to the blade along the first direction or a direction opposite to the first direction.

14. The vibration suppression device according to claim 1, characterized in that: The accommodating space gradually shrinks along the first direction, and the height of the spoiler in the radial direction of the bearing member gradually decreases along the first direction.

15. The vibration suppression device according to claim 1, characterized in that: The bearing member comprises a second peripheral wall away from the accommodating space, and the number of the spoilers is multiple, and the multiple spoilers are evenly distributed on the second peripheral wall; The height of the spoiler in the radial direction of the carrier is inversely correlated with the arrangement density of the spoiler.

16. The vibration suppression device according to claim 1, characterized in that: The spoiler includes a flexible material, and the flexible material includes at least one of pongee, polyester, nylon, and raw silk.

17. A blade assembly, characterized in that: include: blade; as well as According to the vibration suppression device according to any one of claims 1 to 16, the bearing member is arranged around the blade, and at least a portion of the blade along its own length direction is located in the accommodating space.

18. The blade assembly according to claim 17, characterized in that The vibration suppression device further comprises a support member, wherein the support member surrounds the blade, the carrier surrounds or wraps around the support member, and the support member fills at least a portion of the space between the blade and the carrier.

19. The blade assembly according to claim 17, characterized in that The blade comprises a blade root portion and a blade tip portion which are arranged opposite to each other along the length direction of the blade; A first distance between one end of the vibration suppression device facing the blade root and the blade root is D1, a second distance between the other end of the vibration suppression device facing the blade tip and the blade root 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 set, characterized in that: Comprising a blade assembly according to any one of claims 17-19.

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