Vibration damping device for blade, blade assembly and wind turbine generator set

Abstract

The present application discloses a vibration suppression device for blades, a blade assembly and a wind turbine generator set. The vibration suppression device includes a bearing and a spoiler. The bearing is arranged around a reference axis, and the reference axis extends along a first direction. The interior of the bearing is enclosed to form a receiving space capable of receiving at least part of the blade. The spoiler is in the form of a flexible belt, and the spoiler is connected to the bearing and is located on the side of the bearing away from the receiving space. The spoiler can interfere with or prevent the interaction between airflow entrainment layers, thereby suppressing the generation of periodic shedding vortices on the blades, and effectively reducing the vortex-induced vibration phenomenon of the blades. The spoiler in the form of a flexible belt has a more obvious flow disturbance effect, and the effect of suppressing the vortex-induced vibration phenomenon of the blades is more prominent, which reduces the requirements for the bearing, and is conducive to simplifying the structure of the vibration suppression device; the material selection of the spoiler is relatively wide, which reduces the cost of the vibration suppression device.

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; and 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 a cylindrical body surrounding the reference axis.

[0012] In some embodiments, the number of flow disturbing members is plural, and the plural flow disturbing members are arranged at intervals along the outer periphery of the carrier, and each flow disturbing member extends in a first direction and is connected to the carrier; alternatively, the number of flow disturbing members is plural, and each flow disturbing member extends in the radial direction of the carrier, one end of each flow disturbing member is connected to the carrier, and the other end is arranged in a suspended manner.

[0013] In some embodiments, the vibration suppression device further includes a second fixing member, which is arranged around the outer periphery of the carrier and tightly fixes the carrier.

[0014] In some embodiments, the carrier spirally extends along a first direction around the reference axis.

[0015] In some embodiments, the flow disturbing member is provided with a rope passing hole, and the rope passing hole penetrates the flow disturbing member along the length direction or the width direction of the flow disturbing member, and the length direction and the width direction intersect; the carrier is a flexible strip, and the carrier passes through the rope passing hole.

[0016] In some embodiments, both the carrier and the flow disturbing member are plural, at least one flow disturbing member is penetrated through each carrier; the plural carriers are arranged side by side and at intervals and spirally surround the reference axis.

[0017] In some embodiments, the vibration suppression device further includes: an anchor member, which is connected to one end of the carrier along its own length direction and can be fixedly installed on the blade, and the carrier can be anchored to the blade through the anchor member; and / or, a plurality of limiting members, which are connected to different sections of the carrier and can be fixedly installed on the blade, and the limiting members are configured to limit the carrier to move relative to the blade along the first direction or the direction opposite to the first direction.

[0018] In some embodiments, the accommodation space tapers along the first direction, and the height of the flow disturbing member in the radial direction of the carrier gradually decreases along the first direction.

[0019] In some embodiments, the carrier includes a second outer peripheral wall facing away from the accommodation space, the number of flow disturbing members is plural, and the plural flow disturbing members are evenly distributed on the second outer peripheral wall; the height of the flow disturbing member in the radial direction of the carrier is inversely correlated with the arrangement density of the flow disturbing members.

[0020] In some embodiments, the flow disturbing member includes a flexible material, and the flexible material includes at least one of spring subfabrics, polyester, nylon, and raw silk.

[0021] According to the second aspect of the present application, embodiments of the present application further provide a blade assembly, which includes a blade and a vibration suppression device provided according to any embodiment of the present application, the carrier surrounds the blade, and at least a part of the blade along its own length direction is located in the accommodation 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 outside 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 a high degree of flexibility, is very easy to deform, has a relatively obvious spoiling 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-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 structural diagram of the vibration suppression device provided by some embodiments of the present application after being used for a blade.

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

[0030] Figure 4 Is Figure 3 It is a schematic cross-sectional structural diagram of the shown vibration suppression device.

[0031] Figure 5 Is Figure 2 It is a schematic partial structural diagram of the shown vibration suppression device after being used for a blade.

[0032] Figure 6 Is Figure 5 It is a schematic structural diagram after hiding the carrier.

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

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

[0035] Figure 9 It is a schematic structural diagram of the spoiler of the vibration suppression device provided by some embodiments of the present application. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

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

[0038] References to "embodiments" in this application mean that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment 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", "coupled", 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 directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, 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 merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

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

[0042] The term "a plurality of" that appears in this application refers to two or more (including two).

[0043] The vibration suppression device for blades provided by the embodiments of this application can be applied to wind turbine blades, wind turbine generator sets, etc.

[0044] For a better understanding of this application, the following Figures 1 to 7 The vibration suppression device for blades, blade assembly, and wind turbine generator set according to the embodiments of the application will be described in detail.

[0045] Figure 1 is a schematic structural diagram of a wind turbine generator set provided by some embodiments of this application. Refer to Figure 1, an embodiment of the present application provides a wind turbine generator, including a hub 30 and blades 20, and the blades 20 are connected to the hub 30. Of course, the wind turbine generator also includes a tower barrel 40, a nacelle 50, and a generator 60. The tower barrel 40 is connected to the wind turbine foundation, the nacelle 50 is arranged at the top of the tower barrel 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 other examples, the generator 60 may also be located inside the nacelle 50. Among them, the whole formed by connecting multiple blades 20 to the hub 30 can be called an impeller, and the impeller is connected to the rotating shaft of the generator 60 through its hub 30. When the wind acts on the blades 20, it drives the entire impeller 2 and the rotating shaft of the generator 60 to rotate, so as to convert wind energy into electrical energy.

[0046] In recent years, China's wind power development has achieved remarkable results. With the continuous development of wind power technology, small and medium-sized blades have been difficult to meet the current needs, and long and flexible blades have become the future development trend. However, as the blades become longer and the chord length of the blades continuously increases, the natural frequency of the blades decreases, and the problems brought about become 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 at the leading edge and trailing edge of the blades. The periodic shedding vortices will generate periodic lateral forces on the blades placed in the flow field, resulting in periodic vibration of the blades. When the vortex shedding frequency is the same as the natural frequency of the blades, a resonance phenomenon will occur, causing the amplitude of the blades to increase significantly, that is, vortex-induced vibration. When the blades undergo vortex-induced vibration, it will cause great damage to the blades, reduce the service life of the blades, and even cause the blades to break.

[0047] In view of this, an embodiment of the present application provides a vibration suppression device for blades. By setting a carrier and a spoiler in the form of a flexible strip, the carrier can surround at least part of the blades in a surrounding, winding, etc. manner, and the spoiler can be deformed under external actions such as wind force. The spoiler can interfere with or weaken the interaction between the airflow entrainment layers, thereby suppressing the generation of periodic shedding vortices of the blades and effectively reducing the occurrence of vortex-induced vibration of the blades. The spoiler in the form of a flexible strip has a high degree of flexibility, is very easy to deform, has an obvious spoiler effect, and has a prominent effect on suppressing the vortex-induced vibration of the blades. The spoiler in the form of a flexible strip is also convenient to connect with the carrier, reducing the requirements for the shape and structural strength of the carrier in many aspects, and is beneficial to simplifying the structure of the vibration suppression device. The spoiler in the form of a flexible strip has a wide range of material selection, such as streamers, cloth strips, etc., and the price is low, reducing the cost of the vibration suppression device.

[0048] Figure 2 is a schematic structural diagram of the vibration suppression device provided by some embodiments of the present application after being used for the blades, Figure 3 is a schematic structural diagram of the vibration suppression device provided by 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 a high degree of flexibility and is very easy to deform. Its spoiler effect is relatively obvious, and the effect of suppressing the vortex-induced vibration phenomenon of the blade 20 is relatively prominent. The spoiler 12 in the form of a flexible strip is also convenient to connect with the carrier 11, reducing the requirements for various aspects such as the shape and structural strength of the carrier 11, which is beneficial to simplifying the structure of the vibration suppression device 10. The spoiler 12 in the form of a flexible strip has a wide range of material selections, such as streamers, cloth strips, etc., and the price is low, reducing the cost of the vibration suppression device 10.

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

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

[0059] Polyester pongee, polyester, nylon, and raw silk all have high flexibility, strong deformation ability, and can adapt to the external environment for a long time, improving the spoiler effect of the spoiler 12 and extending its service life.

[0060] In alternative embodiments, the material of the spoiler 12 can also be made of other flexible materials with a high degree of flexibility and strong adaptability.

[0061] The inventor recognized that the airfoil thickness of the blade is relatively thin, especially at its tip, which is similar to a flat plate structure, and it is easy to form a stagnation zone when the fluid flows through the blade. The fluid stagnation zone is a phenomenon formed when the fluid encounters an obstacle during flow, which will cause the fluid flow to slow down or even stop. When the blade has fluid stagnation, it will cause the spoiler 12 to have an unclear effect on hindering vortex shedding.

[0062] For this reason, in some embodiments, referring to Figures 4 to 6 , the vibration suppression device 10 further includes a support member 14. The support member 14 is disposed in the accommodation space 13. The support member 14 includes a first wall 142 facing the carrier 11 and a second wall 143 disposed 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 to the outer surface of the blade 20 to support the carrier 11 through the support member 14.

[0063] Preferably, the support member 14 may further include a first part 14a and a second part 14b. When the vibration suppression device 10 is used for the blade 20, the first part 14a and the second part 14b are respectively connected to the windward side and the leeward side of the blade 20 by abutting, bonding or other suitable means, and the first part 14a and the second part 14b can be connected by suitable means such as bonding, binding, sewing, etc. Thus, when the vibration suppression device 10 is in a non-use state, the first part 14a and the second part 14b can be stacked, reducing the occupied space.

[0064] Alternatively, the support member 14 can be an integrally formed annular structure, or can be formed by winding a flexible sheet-like structure around the blade 20 at least one turn and then connecting them by suitable means such as bonding, binding, sewing, etc.

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

[0066] When the vibration suppression device 10 is used for the blade 20, at least a part of the blade 20 is located in the relief 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 relief opening 141 can be attached to the outer surface of the blade 20.

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

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

[0069] Moreover, the support member 14 can be connected to the outside of the blade 20, with high stability and large support strength, improving the structural stability of the carrier member 11.

[0070] In some embodiments, along the direction perpendicular to the first direction X, the 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 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 circular or elliptical.

[0072] 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 into a cylindrical or elliptical cylindrical external shape, which can reduce the resistance generated by the carrier 11 to the air flow, thereby maximizing the prevention of the occurrence of fluid stagnation zones.

[0073] In some embodiments, referring to Figure 4 , the carrier 11 surrounds and wraps the support 14.

[0074] When the vibration suppression device 10 is used for the blade 20, the support 14 can be first installed on the outer surface of the blade 20, and then the carrier 11 can be wound around the outer circumference of the support 14.

[0075] Exemplarily, the carrier 11 can be an integrally formed 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 around the support 14 at least one turn and then connecting it by appropriate means such as bonding, binding, sewing, etc.

[0076] Figure 7 is a partial structural schematic diagram of the vibration suppression device provided by other embodiments of the present application after being used for the blade. For the convenience of observation and understanding, Figure 7 the spoiler 12 of the vibration suppression device is hidden in Figure 7 . In other embodiments, referring to

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

[0078] In some embodiments, the number of supports 14 is multiple, and the multiple supports 14 are arranged at intervals along the first direction X. The interval distance between two adjacent supports 14 is 2m to 10m.

[0079] Optionally, the interval distance between two adjacent supports 14 can 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 larger number of support members 14 are required, which not only makes the assembly cumbersome but also increases the weight, and may have an adverse impact on the blade 20; if the spacing distance between two adjacent support members 14 is too large, the area of the load-bearing member 11 between two adjacent support members 14 may not be supported and collapse, thereby affecting the shedding vortex effect of the vibration suppression device 10.

[0082] By providing a plurality of spaced support members 14 in the embodiments of the present application, the weight of the vibration suppression device 10 can be reduced to a certain extent, and a good shedding vortex effect of the vibration suppression device 10 can be ensured.

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

[0084] Optionally, the first fixing member includes at least one of a hoop, a binding band, 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 the blade 20. Moreover, the first fixing member is also convenient for installation and disassembly, improving the efficiency of installing the vibration suppression device 10 on the blade 20 and the efficiency of disassembling 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 can also be formed into an annular structure by bonding, stapling, sewing, etc., so as to be stably sleeved outside the blade 20.

[0087] In some embodiments, referring to Figure 3 , the load-bearing member 11 is a cylinder surrounding the reference axis a.

[0088] Exemplarily, the load-bearing member 11 can be an integrally formed cylindrical structure. When the vibration suppression device 10 is used for the blade 20, the load-bearing member 11 is sleeved outside the blade 20. As another example, the load-bearing member 11 can also be formed by winding a flexible sheet structure around the blade 20 at least one turn and then connecting it by suitable means such as bonding, stapling, and sewing.

[0089] The material of the carrier 11 includes flexible material so that it can wrap the blade 20 or the support 14 more fittingly. Exemplarily, the carrier 11 may include 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 damping device 10 further includes a second fixing member which is disposed around the outer periphery of the carrier 11 and tightly fixes the carrier 11.

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

[0092] The second fixing member can improve the installation stability of the carrier 11 and reduce the possibility of the carrier 11 falling off the blade 20. Moreover, the second fixing member is also convenient for installation and disassembly, improving the installation efficiency of the vibration damping device 10 onto the blade 20 and the disassembly efficiency from the blade 20, without affecting the structure and performance of the blade 20 itself.

[0093] In an alternative embodiment, the carrier 11 can also form an annular structure by bonding, binding, sewing, etc. so as to stably sleeved outside the blade 20.

[0094] In some embodiments, referring to Figure 3 , the number of the flow disturbing members 12 is multiple, and the multiple flow disturbing members 12 are arranged at intervals along the outer periphery of the carrier 11, and each flow disturbing member 12 extends along the first direction X and is connected to the carrier 11. This arrangement reduces the number of the flow disturbing members 12 and improves the installation efficiency of the vibration damping device 10 onto the blade 20.

[0095] Optionally, the multiple flow disturbing members 12 are evenly distributed along the outer periphery of the carrier 11.

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

[0097] The length of the flow disturbing member 12 is substantially the same as the length of the carrier 1 along the first direction X to extend the length of the flow disturbing member 12 as much as possible.

[0098] Figure 8 It is a partial structural schematic diagram of the vibration damping device provided by some other embodiments of the present application after being used for the blade. In some other embodiments, referring to Figure 8, the number of the spoiler members 12 is plural, each spoiler member 12 extends radially along the carrier member 11, one end of each spoiler member 12 is connected to the carrier member 11, and the other end is disposed in a suspended manner. This arrangement shortens the length of a single spoiler member 12, expands the selectable range of the spoiler members 12. For example, the spoiler members 12 can use shredded cloth strips, further reducing the cost of the vibration suppression device 10.

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

[0100] The length direction of the spoiler member 12 is perpendicular to the first direction X. One end of the spoiler member 12 along its length direction is connected to the carrier member 11, and a plurality of spoiler members 12 can be arranged in a radial pattern.

[0101] In some other embodiments, referring to Figure 5 , the carrier member 11 spirally extends along the first direction X around the reference axis a.

[0102] Exemplarily, the carrier member 11 is spirally 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 carrier member 11 is spirally wound around the outside of the support member 14.

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

[0105] Figure 9 is a schematic structural view of the spoiler member of the vibration suppression device provided in some embodiments of the present application. In some embodiments, referring to Figure 9 , the spoiler member 12 is provided with a rope passing hole 121. The rope passing hole 121 penetrates the spoiler member 12 along the length direction or the width direction of the spoiler member 12, and the length direction and the width direction of the spoiler member 12 intersect. Optionally, the length direction and the width direction of the spoiler member 12 are perpendicular. The carrier member 11 is in the form of a flexible strip, and the carrier member 11 passes through the rope passing hole 121.

[0106] Exemplarily, the rope passing hole 121 is provided on one side of the spoiler member 12 along its own width direction, and the rope passing hole 121 penetrates the spoiler member 12 along the length direction of the spoiler member 12.

[0107] As another example, the rope passing hole 121 is provided at one end of the spoiler member 12 along its own width direction, and the rope passing hole 121 penetrates the spoiler member 12 along the width direction of the spoiler member 12.

[0108] The carrier 11 is a flexible strip so that the carrier 11 can deform and helically wind around the outside of the blade 20 or the support member 14.

[0109] The carrier 11 passes through 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 between the two.

[0110] Before the vibration suppression device 10 is used for the blade 20, the carrier 11 is first passed through the rope-passing hole 121 of the spoiler 12, and then the carrier 11 is helically wound around the outside of the blade 20 or the support member 14, which improves the convenience of installation and disassembly of the vibration suppression device 10.

[0111] In some embodiments, both the carrier 11 and the spoiler 12 are multiple. At least one spoiler 12 is passed through each carrier 11. The multiple carriers 11 are helically wound around the reference axis a side by side and at intervals.

[0112] Exemplarily, one spoiler 12 is passed through the carrier 11, and the length of the spoiler 12 is the same as the length of the carrier 11.

[0113] As another example, multiple spoilers 12 are passed through the carrier 11, and the multiple spoilers 12 are arranged in sequence along the length direction of the carrier 11, which shortens the length of a single spoiler 12.

[0114] When the vibration suppression device 10 is used for the blade 20, the multiple carriers 11 can be simultaneously helically wound around the outside of the blade 20 or the support member 14, which improves the installation efficiency of the vibration suppression device 10. The multiple carriers 11 are arranged at intervals, which can prevent the spoilers 12 from being too densely distributed and intertwined, affecting the spoiler effect.

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

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

[0117] The anchor 17 can 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 realized.

[0118] 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 by a detachable method such as screw connection, bonding, or clamping and is 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 first, and then the carrier 11 can be helically 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 installed on the blade 20. The plurality of limit members 18 are configured to limit the movement of the carrier 11 relative to the blade 20 in the first direction X or the direction opposite to the first direction X. The limit member 18 can prevent the carrier 11 from slipping off the blade 20 or generating a large displacement relative to the blade 20.

[0121] Optionally, the limit member 18 can be a fastener such as a rivet or a screw. The limit member 18 can be installed on the blade 20 by a detachable method such as screw connection, bonding, or snap connection and fixed relative to the blade 20.

[0122] The connection method between the limit member 18 and the carrier 11 includes but is not limited to abutting, plugging, bonding, etc. For example, the limit member 18 can abut against a certain section of the carrier 11 in the first direction X or the direction opposite to the first direction X.

[0123] In some embodiments, the accommodation space 13 tapers in the first direction X, and the height of the spoiler 12 in the radial direction of the carrier 11 gradually decreases in 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.

[0124] The accommodation space 13 tapers in the first direction X. In other words, the cross-sectional area of the accommodation space 13 intercepted in the direction perpendicular to the first direction X gradually decreases in 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 changes in a decreasing manner from its leaf root to its leaf tip. Therefore, the accommodation space 13 tapers in the first direction X, and the first direction X is the direction from the leaf root to the leaf tip.

[0126] In the embodiment of the present application, the height of the spoiler 12 is set to gradually decrease in the first direction X, which can make the height of the spoiler 12 positively correlated with the chord length of the blade 20. That is, the height of the spoiler 12 corresponding to the region where the chord length of the blade 20 is longer is higher; the height of the spoiler 12 corresponding to the region where the chord length of the blade 20 is shorter is lower. Thus, the spoiler 12 can not only play a good spoiler role but also avoid the possibility of entanglement due to the excessive length of the spoiler 12.

[0127] Optionally, the height of the spoiler 12 may be 0.1 to 0.5 times the chord length at the position of the blade 20 where it 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 outer peripheral wall 111 facing away from the accommodation space 13. The number of spoilers 12 is multiple, and the multiple spoilers 12 are evenly distributed on the second outer 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 spoilers 12.

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

[0131] The more densely the spoilers 12 are arranged, the smaller the gap between adjacent spoilers 12. The airflow in each area of the blade 20 can be disturbed by multiple densely distributed spoilers 12. The gap between adjacent spoilers 12 is small. If the height of the spoilers 12 is long, multiple spoilers 12 are likely to entangle with each other, affecting the spoiler effect.

[0132] The sparser the arrangement of the spoilers 12, the greater 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 as to disturb the airflow in the gap between adjacent spoilers 12 and ensure a good spoiler effect.

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

[0134] Since the vibration suppression device 10 of the embodiment of the present application can effectively suppress the generation of periodic shedding vortices of the blade 20 through the flexible strip-shaped spoiler 12, the phenomenon of vortex-induced vibration of the blade 20 is reduced, the service life of the blade 20 is prolonged, and the possibility of damage to the blade 20 in the 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.

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

[0136] Exemplarily, the support member 14 can fill the entire space between the blade 20 and the carrier member 11 to stably support each position of the carrier member 11.

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

[0138] The support member 14 can support the carrier member 11 outwardly, preventing the carrier member 11 from adhering to the outer surface of the blade 20, thereby improving the external shape of the carrier member 11. Compared with the setting method in which the carrier member 11 directly surrounds the blade 20, the support member 14 can make the external shape of the carrier member 11 more plump, effectively reducing the possibility of the occurrence of a fluid stagnation area or preventing the fluid stagnation area from being too large, thereby improving the effect of the vibration suppression device 10 in suppressing the shedding vortex generated by the blade 20.

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

[0140] The blade root 20a is the part where the blade 20 is connected to the hub 30, that is, the part closest to the hub 30. The blade tip 20b is the position where the blade 20 is far from the hub 30. The vibration suppression device 10 is provided 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 phenomena in the section from the position 65% - 75% of its total length from the blade root 20a to the blade tip 20b. Therefore, in the embodiment of the present application, the vibration suppression device 10 is arranged on the outer periphery of this part of the section. Among them, the first distance between one end of the vibration suppression device 10 facing the blade root 20a and the blade root 20a is 65% - 75% of the total length of the blade 20, which can more specifically suppress the vortex-induced vibration phenomenon of the blade 20.

[0142] The tip portion 20b is approximately a tip. If the vibration suppression device 10 is installed at the tip portion 20b, it will not only affect the installation stability but also be inconvenient for operation. Therefore, the vibration suppression device 10 in the embodiment of the present application is not provided on the outer periphery of the tip portion 20b, but is spaced a certain distance from the tip portion 20b, which improves the installation stability and convenience of the vibration suppression device 10.

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

[0144] As described above, the foregoing is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within 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, 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; A spoiler, the spoiler is a flexible strip-shaped body, the spoiler is connected to the carrier and is located on a side of the carrier away from the accommodating space; as well as A support member is disposed in the accommodating space, the support member comprises a first wall facing the bearing member and a second wall disposed opposite to the first wall, the first wall is connected to the bearing member, and the second wall is used to be connected to the outer surface of the blade so as to support the bearing member through the support member; Along a direction perpendicular to the first direction, a cross section of the first wall is circular or elliptical.

2. The vibration suppression device according to claim 1, 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.

3. The vibration suppression device according to claim 1, 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.

4. The vibration suppression device according to claim 1, 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.

5. 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.

6. The vibration suppression device according to claim 5, 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.

7. The vibration suppression device according to claim 6, 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.

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

9. The vibration suppression device according to claim 8, 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.

10. The vibration suppression device according to claim 9, 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.

11. The anti-vibration device according to claim 9, characterized in that, Also includes: An anchor, connected to one end of the carrier along its own length direction, and capable of being fixedly installed on the blade, the carrier can be anchored to the blade through the anchor; and / or A plurality of limit members, connected to different sections of the carrier, and capable of being fixedly installed on the blade, the limit members are configured to limit the movement of the carrier relative to the blade in the first direction or the direction opposite to the first direction.

12. The vibration suppression device according to claim 1, wherein The accommodation space tapers in the first direction, and the height of the spoiler in the radial direction of the carrier gradually decreases in the first direction.

13. The vibration suppression device according to claim 1, wherein The carrier includes a second outer peripheral wall facing away from the accommodation space, the number of the spoilers is plural, and the plural spoilers are evenly distributed on the second outer peripheral wall; The height of the spoiler in the radial direction of the carrier is inversely correlated with the arrangement density of the spoiler.

14. The vibration suppression device according to claim 1, wherein The spoiler includes a flexible material, and the flexible material includes at least one of polyester pongee, polyester, nylon and raw silk.

15. A blade assembly, characterized in that, Comprising: A blade; And The vibration suppression device according to any one of claims 1-14, the carrier is arranged around the blade, and at least a part of the blade along its own length direction is located in the accommodation space.

16. The blade assembly according to claim 15, wherein The vibration suppression device further includes a support member, the support member surrounds the blade, the carrier surrounds or winds around the support member, and the support member fills at least part of the space between the blade and the carrier.

17. The blade assembly according to claim 15, wherein The blade includes a blade root portion and a blade tip portion oppositely arranged along its own length direction; The first distance between one end of the vibration suppression device facing the blade root portion and the blade root portion is D1, the 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%, 90%≤D2 / L≤98%.

18. A wind turbine generator, characterized in that, Comprising the blade assembly according to any one of claims 15-17.

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