Damping wind turbine blade oscillations

Abstract

A vibration damping device (110) is described for damping the vibration (particularly edgewise) of a wind turbine blade (101) during idling, stationary operation, transport, or maintenance. The device includes a detachable spoiler (120) detachably connected to the rotor blade (101), particularly to a rotor blade surface (104), to provide aerodynamic drag in a direction (102) generally parallel to the average chordal direction (103) of the rotor blade, particularly increasing drag.

Description

Technical Field

[0001] This invention relates to a vibration damping device for attenuating vibrations of wind turbine blades during idling, stationary operation, transportation, or maintenance. Furthermore, this invention relates to a rotor blade including the vibration damping device, and even more specifically to a wind turbine including the rotor blade. Prior Technology

[0002] Especially when stationary or stopped, the rotor blades of a wind turbine may vibrate.

[0003] US2012301293 (A1) discloses a method for operating a wind turbine to prevent vibration of wind turbine blades when stationary or idling at low speeds, and discloses a vibration damping device for wind turbine blades. This device includes a releasable attached blade shield that provides a non-aerodynamic surface to a specific area of ​​the blade. This has been found to prevent airflow from adhering to the blade and periodically detaching in a phenomenon known as vortex shedding, thereby preventing blade vibration from becoming a problem. The blade shield may include a sleeve made of a mesh material, which can be positioned on the blade by a service engineer using guide wires before installation or at the site.

[0004] US2021079896 (A1) discloses an apparatus for mitigating vortex shedding vibrations or stall-induced vibrations on one or more rotor blades of a wind turbine during a stationary period, comprising at least one positioning element located between the tip and root sections of the blade. The positioning element is adapted to wrap around at least a portion of the rotor blade. The apparatus also includes at least one airflow modification element connected to the positioning element and defining a height relative to the surface of the rotor blade. Furthermore, the apparatus includes at least one fixing element operatively connected to the positioning element for temporarily fixing the airflow modification element to the rotor blade.

[0005] However, it has been observed that edgewise or overall vibration of wind turbine blades can cause problems in one or more situations, and has not traditionally been effectively mitigated in all situations or environments.

[0006] Therefore, a device may be needed to attenuate the vibration of wind turbine blades, particularly in static or idling conditions, through a simple device that allows for easy operation. Further, a device may be needed for the corresponding wind turbine blades to have, in particular, vibration damping mechanisms, to effectively and reliably attenuate vibrations (especially edge vibrations of the blades), especially during static or very slow movement or very slow rotation (idling). A wind turbine may further be needed having at least one blade capable of effectively attenuating edge vibrations. Summary of the Invention

[0007] This requirement can be met by the subject matter of the independent claim. Advantageous embodiments of the invention are described through dependent claims.

[0008] According to one embodiment of the present invention, a vibration damping device is provided for mitigating edge vibration of a wind turbine blade during idling, stationary operation, transport, or maintenance. The vibration damping device includes a detachable spoiler that can be connected to the rotor blade, particularly to a rotor blade surface, to provide aerodynamic drag in the edge direction (generally parallel to the (partial) chord (line or plane) of the blade), particularly increasing drag.

[0009] The vibration damping device can be configured to be reversibly connected to or mounted on or at the wind turbine blade, allowing it to be installed or removed as needed or required. When the wind turbine rotor rotates at a wind speed that ensures a consistent angular velocity, the vibration damping device may not need to be mounted on the blade during power generation (i.e., throughout the entire operation). The vibration damping device can be mounted on the wind turbine blade, for example (reversibly), while the rotor is not rotating (or only rotating slowly), making the wind turbine rotor substantially stationary. For example, the vibration damping device can be installed during maintenance, transportation, and turbine commissioning phases, when the rotor is stopped or idling.

[0010] After the vibration damping device is installed, the wind turbine blades may move slightly, but will not rotate as they would during normal power generation. When the vibration damping device is installed on the wind turbine blades, the wind turbine rotor can be stopped by a brake or placed in an idling mode (slow rotation).

[0011] The spoiler may include or be provided in a shape or configuration to generate or increase air resistance, thereby effectively attenuating vibrations, particularly edge vibrations of the wind turbine blade. The removable spoiler is not permanently mounted on the blade but can be removed or installed as needed.

[0012] The chord line (at a specific spanwise (or longitudinal) position) can be considered as the line connecting the leading and trailing edges of a 2D rotor or a 2D cutting line perpendicular to the spanwise direction.

[0013] The average chord (or direction) can be the average (direction) of multiple chords (or directions) at multiple spanwise (or longitudinal) positions (especially along the longitudinal range of the entire blade).

[0014] The vibration damping device (especially the detachable spoiler) can effectively dampen edge vibrations, that is, vibrations that are understood to substantially involve the vibration or movement of the rotor blades in the average chordal direction of the rotor blades.

[0015] Embodiments of the invention can alter the aerodynamic behavior of the outer section of a rotor blade by mounting or attaching the detachable spoiler to it. The vibration damping device can reduce sensitivity to vibrations by increasing drag and / or by slightly redirecting forces from the edge direction to the flap-wise direction. Thus, the detachable spoiler may include a surface exposed to the implosive wind to redirect it transversely to (particularly substantially perpendicular to) the local chord direction of the blade. The vibration damping device, or in particular the detachable spoiler, may not disrupt the span-wise coherence of the vortex flowing at the spanwise position without the device. The vibration damping device, and in particular the detachable spoiler, can brake and / or redirect the edge motion of the wind turbine blade.

[0016] According to one embodiment of the invention, the detachable spoiler, when attached to the blade, extends and / or protrudes from the blade surface in a direction generally perpendicular to one of the local airfoil lines (or directions) of the blade, particularly from a suction-side surface and / or a pressure-side surface.

[0017] When the detachable spoiler extends or protrudes from the blade surface, it can provide effective air resistance. When the detachable spoiler provides components extending from the suction side surface and / or the pressure side surface, it can increase air resistance, thereby more effectively attenuating or mitigating edge vibration.

[0018] According to one embodiment of the invention, the detachable spoiler includes: a connection system configured to contact the blade, particularly the blade surface, and for mounting the vibration damping device on the blade; and one or more aerodynamic drag members coupled to the connection system. These drag members of the device will provide necessary aerodynamic drag in the edge direction. The connection system is specifically configured to contact or couple to a portion of a suction-side surface and / or a pressure-side surface of the blade, thereby allowing the drag members to be attached to the blade.

[0019] Depending on the specific implementation, the connection system can have different configurations. The connection system can be fully reversibly or detachably connected to the blade, or it may include a portion permanently mounted on the wind turbine (particularly the surface of the wind turbine blade).

[0020] The connection system can be specifically configured to not require any bolt contact with or to be mounted on the surface of the wind turbine blade. The connection system can contact portions of the outer blade surface (including the suction side surface and the pressure side surface), as well as the trailing edge and the leading edge, at the appropriate mounting location.

[0021] The connection system or device can be configured to employ bolted connections, glued connections, click-in connections, or any possible connections between different components of the device.

[0022] The one or more aerodynamic drag components (e.g., providing aerodynamic drag surfaces or structures) can be permanently coupled to the connection system, for example, using adhesives and / or bolts.

[0023] According to one embodiment of the present invention, when the device is mounted on the blade, the drag members are arranged in a direction substantially parallel to one of the spanwise directions of the blade, and / or one of the first air drag members protrudes from the surface of the blade away from the pressure side surface, and / or one of the second air drag members protrudes from the surface of the blade away from the suction side surface.

[0024] When the drag members (their respective main surfaces or main planes) are arranged in a direction parallel to the spanwise direction, attenuation can be improved. When one or more drag members protrude away from the pressure side and / or suction side, the air resistance of the drag members can effectively reduce any movement of the rotor blades in a plane generally parallel to the chord line.

[0025] According to one embodiment of the invention, at least one air resistance member includes any spanwise elongated shape that extends generally along / parallel to one of the spanwise directions of the blade in a longitudinal direction and extends generally perpendicular to one of the width directions of the blade's partial chords, protruding from the surface of the blade.

[0026] This prominent drag member can be configured to effectively provide high air resistance in the direction of the blade's vibration along its edge.

[0027] According to one embodiment of the invention, at least one aerodynamic drag member comprises at least one of the following: generally rectangular shape; U-shaped; semi-tubular shape, particularly having a circular cross-section; L-shaped extrusion; concave surface; any other shape that is sufficiently rigid and / or has a surface that can be used as an aerodynamic brake.

[0028] Therefore, it can be anticipated that the design and structural details of this air resistance component will have considerable flexibility. The appropriate design or shape can be selected according to the specific application, especially according to the geometry and / or size of the rotor blades.

[0029] According to one embodiment of the invention, the connection system includes a joining portion, particularly a slit-like portion, particularly a V-shaped portion, to receive at least a portion of the trailing edge and / or at least a portion of the suction-side surface and / or the pressure-side surface of the blade. The joining portion is particularly generally mirror-symmetrical.

[0030] The connection system, including the joint portion, can be integrally formed with one or more resistance members (e.g., made of foam material or plastic, such as polyurethane foam, polystyrene foam, polyurethane-coated foam, or any other lightweight foam material), particularly as a single component.

[0031] Thus, an effective embodiment of the connection system can be provided.

[0032] According to one embodiment of the invention, the particular connection system includes a strip or rope for wrapping around (and / or contacting) the outer surface of the blade (perpendicular to the longitudinal direction) and passing through two through holes in the joint portion so as to (reversibly) secure / tie the joint portion to the blade.

[0033] The strip, belt, or rope can be wound around and tensioned on the outer surface of the blade (particularly including the suction side surface, pressure side surface, and leading and trailing edges), thereby mounting or securing the engagement portion of the connection system to the blade (outer surface). Thus, the strip can be tensioned so that the entire detachable spoiler can be at least partially secured to the outer surface of the rotor blade through force closure and / or frictional connection.

[0034] When the device is installed at the trailing edge, a gap can be provided between the device and the trailing edge to avoid contact with optional dinosaur tails that may be installed on the blade at the trailing edge.

[0035] According to one embodiment of the invention, the connection system includes: at least one (particularly two) mounting members, the at least one mounting member being connected to at least one aerodynamic drag member; a hook-and-loop fastener (or touch-sensitive fastener) comprising a first component and a second component, wherein the first component is one of a hook and a loop, and the second component is the other of the hook and the loop, the second component being detachably engaged with the first component, wherein the first component is attached to the blade, particularly the blade surface, and wherein the second component is coupled to the mounting member or bracket, particularly by gluing and / or bolting or by any other means (including touch-sensitive fasteners), wherein the first component and the second component are engaged in order to mount the mounting member to the blade.

[0036] Therefore, an alternative or additional embodiment / configuration of the connection system can be provided. The mounting bracket may also be referred to as a mounting element or mounting frame. The mounting element does not necessarily need to be in the shape of a bracket. The hook-and-loop fastener can provide an efficient method for reversibly mounting the detachable spoiler onto the wind turbine blade.

[0037] According to one embodiment of the present invention, the mounting member has a triangular cross-sectional shape, a first side that is complementary to the shape of the blade surface, and a second side to which the drag member is attached.

[0038] The first side of the mounting bracket or mounting member may include (or be attached to) the second part of the hook-and-loop fastener. The blade surface includes the first part of the hook-and-loop fastener. Therefore, by engaging the first part (of the hook-and-loop fastener) with the second part (of the hook-and-loop fastener), the mounting bracket or mounting member is reversibly connected to the rotor blade together with the resistance member. The resistance member may be attached to the second side of the mounting member or mounting bracket, for example, by using an adhesive and / or one or more bolts or through any other solid mechanical connection. Therefore, the mounting member or mounting bracket can be permanently and non-reversibly connected to the resistance member.

[0039] Embodiments of the present invention may provide that the device is mounted from / at the leading edge or from / at the trailing edge.

[0040] According to one embodiment of the present invention, a rotor blade system is provided, which includes a rotor blade; and a vibration damping device according to one of the foregoing embodiments is mounted on the rotor blade.

[0041] The vibration damping device can be installed at the tip of the rotor blade, wherein, for example, the distance between the removable spoiler and the tip of the rotor blade can be, for example, within the range of 0.0% or 0.5% to 30% of the longitudinal length of the rotor blade. Other values ​​are also possible. The longitudinal range of the removable spoiler can, for example, be between 0.5% and 20% of the longitudinal range or length of the rotor blade. Other values ​​are also possible.

[0042] According to one embodiment of the present invention, a wind turbine is provided, comprising: a rotor having one or more blades mounted thereon, wherein at least one blade is configured according to the foregoing embodiments.

[0043] According to one embodiment of the present invention, all rotor blades can be configured to be equipped with corresponding vibration damping devices.

[0044] It should be understood that features described, provided, or applied individually or in any combination to the vibration damping device and / or rotor blades and / or wind turbine can also be applied individually or in any combination to or provided for vibration reduction methods according to embodiments of the present invention, and vice versa.

[0045] According to one embodiment of the present invention, a method for attenuating vibrations (particularly edge vibrations) of a wind turbine blade during idling or stationary periods is provided, comprising: detachably attaching a removable spoiler to the rotor blade (particularly the surface of the rotor blade) to provide aerodynamic drag in a direction substantially parallel to one of the average local chord lines of the blade, particularly increasing drag.

[0046] This method can be implemented specifically by using a vibration damping device according to one of the foregoing, illustrated, or described embodiments. The vibration damping device can thus be temporarily mounted or attached to the rotor blade. When the wind turbine is to begin normal operation, the removable spoiler can be removed or detached from the rotor blade by maintenance personnel.

[0047] Embodiments of the invention will now be described with reference to the accompanying drawings. The invention is not limited to the embodiments described or illustrated. Simple Explanation of the Diagram

[0048] The descriptions in the accompanying drawings are schematic. It is worth noting that in different drawings, similar or identical elements in structure and / or function have the same element symbols or element symbols that differ only in the first digit. A description of an element not described in one embodiment may be taken from a description of that element in another embodiment. Figure 1 schematically illustrates a portion of a wind turbine blade system according to an embodiment of the present invention; Figure 2 schematically illustrates a wind turbine blade system according to an embodiment of the present invention; Figure 3 schematically illustrates a portion of a wind turbine blade system according to an embodiment of the present invention; Figure 4 schematically illustrates a wind turbine blade system according to an embodiment of the present invention; Figure 5 schematically illustrates a wind turbine blade system according to an embodiment of the present invention in the form of an exploded view; Figures 6 and 7 schematically illustrate a wind turbine blade system according to an embodiment of the present invention; Figure 8 schematically illustrates a wind turbine blade system according to an embodiment of the present invention; and Figure 9 schematically illustrates a wind turbine according to one embodiment of the present invention. Implementation

[0049] In the accompanying drawings, features or elements that are similar in structure and / or function are labeled with element symbols that differ only in the first digit. A description of an element not described in detail in one embodiment of the drawings may be taken from a corresponding element in another embodiment.

[0050] Figure 1 shows a portion of a wind turbine blade system 100 according to an embodiment of the invention, including rotor blades 101 and a vibration damping device 110 according to an embodiment of the invention, wherein the vibration damping device 110 is attached to the rotor blades 101. In Figure 2, the entire extent of the rotor blade system 100 is fully illustrated. The vibration damping device 110 shown in Figure 1 is specifically designed to dampen vibrations of the wind turbine blades 101 during idling, stationary operation, transport, or maintenance.

[0051] The vibration damping device 110 includes a detachable spoiler 120, which is detachably connected to the rotor blade 101 and provides aerodynamic drag in a direction 102 generally parallel to the average local chord line 103 of the blade 101. The wind turbine blade 101 includes a suction-side surface 104 and a pressure-side surface located behind the suction-side surface 104 (the pressure side is not visible in FIG. 1). The wind turbine blade further includes a leading edge 105 and a trailing edge 106. FIG. 1 illustrates the state when the detachable spoiler 120 is connected to the wind turbine blade 101.

[0052] As shown in Figure 1, the detachable spoiler 120 includes portions 109a and 109b that extend from the suction blade surface 104 (and also from the pressure blade surface) at a height h in a direction 107 generally perpendicular to the average local chord 103 of the blade 101.

[0053] The detachable spoiler includes a connection system 108 configured to contact the blade 101 (particularly with the suction-side surface 104 and / or the pressure-side surface), wherein the connection system 108 is used to mount the vibration damping device 110 or the spoiler 120 on the wind turbine blade 101.

[0054] In the embodiment shown in FIG1, the detachable spoiler 120 includes two aerodynamic drag members 109a, 109b, which are coupled to the connection system 108 and provide aerodynamic drag in a direction 102 perpendicular to the main extension plane of the drag members, wherein this main extension plane is oriented to be substantially perpendicular to the local average airfoil chord 103 of the rotor blade 101.

[0055] As can be seen from Figure 1, when the rotor blade 100 is viewed from a perspective that is approximately perpendicular to the local chord line 103, the drag members 109a and 109b extend parallel to the spanwise direction 130 of the blade.

[0056] In other embodiments, contrary to the depiction in FIG1, the device may be mounted at the leading edge.

[0057] As can be seen from Figure 1, the air resistance components 109a and 109b include extruded material profiles (e.g., material profiles with a fixed cross-sectional profile formed by pushing material through a mold or template or a mold for the desired cross-section) 111a and 111b, which have a longitudinal range le in the longitudinal direction and a width range we in the width direction that is generally perpendicular to the local chord direction 103, as can be seen from Figure 1.

[0058] In other embodiments, the detachable spoiler 120 may consist of only one air resistance member extending from the suction-side surface or the pressure-side surface.

[0059] The shape or design of the air resistance components 109a and 109b may be different in different embodiments and have been described above.

[0060] In the embodiment shown in FIG1, the connection system 108 includes an engagement portion 113, wherein the engagement portion 113 is particularly a slit-like portion or a V-shaped portion to receive at least a portion of the suction-side surface 104 of the blade and / or the pressure-side surface (not shown). However, the engagement portion or V-shaped portion 113 (particularly the apex) may be maintained at a certain distance from the trailing edge, such that the gap with this boundary will prevent damage to the final trailing edge attachment, such as that of a dinosaur tail.

[0061] The connection system of the embodiment shown in FIG1 further includes a strip or band 114 (shown in a relaxed state in FIG1, which can be tightened for fixation) for wrapping around the outer surface of the blade and passing through two openings 115 provided in the engagement portion 113, so as to bind the engagement portion 113 to the rotor blade. Air resistance members 109a, 109b (permanently or irreversibly) are connected to the engagement portion 113.

[0062] As can be seen from Figure 2, which illustrates the entire rotor blade system 100 (a part of which is shown in Figure 1), the rotor blade 101 has a longitudinal range leb, and the vibration damping device 110 is installed at a distance dt away from or separated from the blade tip 116.

[0063] Figures 3 and 4 schematically illustrate a portion and the entire blade system according to another embodiment of the invention. The rotor blade system 200 shown in Figures 3 and 4 includes a wind turbine blade 201 and a vibration damping device 210 including a removable spoiler 220. In Figures 3 and 4, the removable spoiler 220 portion is shown in a transparent manner to more clearly show the constituent components.

[0064] The connection system 208 includes at least two mounting brackets 217a and 217b, to which aerodynamic drag members 209 are attached. The connection system 208 further includes hook-and-loop fasteners 218a and 218b for each mounting bracket 217a and 217b. First components 221a and 221b of the hook-and-loop fasteners 218a and 218b are attached to the rotor blade. Second components (not visible in Figures 3 and 4) are coupled to edges 222a and 222b of the corresponding mounting brackets 217a and 217b facing the blade surface. Thus, in order to mount the mounting brackets 217a and 217b to the blade 201, the first components 221a and 221b engage with the mating second components 222a and 222b.

[0065] The first sides 222a and 222b of the corresponding mounting brackets 217a and 217b are substantially complementary in shape to the suction side and / or pressure side surface 204 of the rotor blades. The corresponding second sides 223a and 223b are attached to or mounted with corresponding aerodynamic drag members 209.

[0066] In other embodiments, additional mounting brackets may be connected to, for example, the pressure side of the blade, and these respective mounting brackets may hold one or more additional aerodynamic drag components.

[0067] Figure 4 illustrates the entire rotor blade system 200, and describes the corresponding installation positions of the vibration damping devices 210.

[0068] The mounting system shown in Figures 3 and 4 may include a VELCRO strip on the blade surface and on one or both sides of the corresponding mounting bracket. The corresponding aerodynamic brake or spoiler 209 may be bolted and / or glued to the corresponding mounting bracket, or may be secured by any other mechanical connection.

[0069] There may be one or more mounting components, instead of two as shown in Figures 3 and 4.

[0070] The spoiler element (in this case, a U-shaped extrusion) can be placed on the suction side, the pressure side, or both.

[0071] Spoiler elements are not necessarily U-shaped; they can be semi-tubes (circular), L-shaped extrusions, or any other shape that is rigid enough and has a surface that can be used as an aerodynamic brake.

[0072] The rotor blade system 500 shown in Figure 5, in an exploded view, includes a wind turbine blade 501 and a vibration damping device 510 according to an embodiment of the present invention. The device 510 includes a connection system 508 and one or more aerodynamic drag members 509a, 509b connected to the connection system 508.

[0073] In the embodiment shown in FIG5, the connection system 508 includes at least one or more of two mounting brackets 560a, 560b; at least one aerodynamic drag member 509a, 509b is connected to the mounting brackets 560a, 560b. In the embodiment shown in FIG5, the mounting brackets are substantially U-shaped and configured to partially engage or surround a portion of the leading edge 505 of the rotor blade 501.

[0074] In the illustrated embodiment, mounting brackets 560a and 560b each include two clamping members 561a and 562b, respectively. Each clamping member includes a lower circular spring 563 that ensures contact with a portion of either the suction or pressure side of the rotor blade 501 and retains the device 510 connected to the rotor blade 501. Due to the spring force, as the clamping members 564a and 564b move toward a portion of the rotor blade 101, the corresponding contact member 563 tends to rotate inward to apply a clamping force. Specifically, the clamping members prevent the device 510 from sliding outward from the leading edge 505, and thereby securely connect the device 510 to the rotor blade 501.

[0075] In other embodiments, the corresponding device 510 may be mounted or connected to the rotor blade at the trailing edge 506 of the rotor blade.

[0076] Figures 6 and 7 schematically illustrate a rotor blade system 600 according to yet another embodiment of the invention. The device 610 includes a connection system 608 configured to contact a rotor blade 601 and to mount the device 610 onto the rotor blade 601. The device 610 further includes aerodynamic drag members 609a and 609b (in this embodiment, integrally formed) projecting from the surface of the blade 601.

[0077] The connection system 608 includes an engagement portion 670, which is particularly V-shaped, for example to receive at least a portion of the suction side surface and / or pressure side surface of the blade, and particularly to receive the trailing edge 606 of the blade 601 or a portion of the leading edge 605 of the blade 601 in other embodiments.

[0078] In this embodiment, the V-shaped joint is not a separate component. The connection system 608 is integrally molded with the resistance member. It is a monolithic foam block with a sleeve that can be fitted onto the rear or front edge.

[0079] In the embodiments shown in Figures 6 and 7, the joining portion 670 is integrally formed with one or more aerodynamic drag members 609a, 609b. Thus, the integrally formed part consisting of drag members 609a, 609b and the joining portion may, for example, contain or be made of foam material or plastic (e.g., polyurethane foam, polystyrene foam, polyurethane-coated foam, or any other lightweight foam material).

[0080] Similar to the embodiment shown in FIG1, the device 610 includes one or more strips 614 surrounding the periphery of the rotor blade 601 and passing through two elongated holes 615a, 615b, wherein the elongated holes 615a, 615b are disposed in an integrally formed part including resistance members 609a, 609b and a joint portion 670.

[0081] Figure 8 further schematically illustrates a wind turbine blade system 800 according to an embodiment of the present invention. Here, a detachable spoiler 820 is connected to a connecting cable 875 extending in a spanwise direction 876 substantially parallel to the longitudinal direction of the rotor blade 801.

[0082] It should be understood that embodiments of the present invention may allow the use of cables, ropes, belts or strips that extend in the spanwise direction and / or, as shown in Figures 1, 6 and 7, generally perpendicular to this spanwise direction around the periphery of the rotor blades to install devices for damping vibrations.

[0083] In the embodiments shown in Figures 6 and 7, the corresponding parts including the resistance member and the joint portion can be fixed or connected to the rotor blade using one or more strips 614, for example, one strip, two strips, or even more strips 614.

[0084] Instead of using the chordal bars shown in Figures 1, 6, and 7, spanwise bars or a combination of both can be used to install the vibration damping device.

[0085] Figure 9 schematically illustrates a wind turbine 550 according to one embodiment of the present invention. The wind turbine includes a wind turbine tower 551 and a nacelle 552 mounted on the tower 551. A generator (not shown) is housed within the nacelle 552, which is mechanically connected to a rotor hub 553. One or more rotor blades 501 or rotor blade systems 500 are mounted at the rotor hub 553. At least one rotor blade includes a vibration damping device 510 detachably mounted on the rotor blade 501.

[0086] It should be noted that the term "comprising" does not exclude other elements or steps, and "a" does not exclude multiple. Furthermore, elements described in relation to different embodiments can be combined. It should also be noted that element symbols in the claims should not be interpreted as limiting the scope of the claims.

[0087] 100: Wind turbine blade system 101: Rotor blades 102: Direction 103: Average local chord line 104: Suction side surface 105: Foreshadowing 106: Trailing edge 107: Direction 108: Connection System 109a: Partial (Aerodynamic drag components) 109b: Partial (Aerodynamic drag components) 110: Vibration damping device 111a: Extruded material shape 111b: Extruded material shape 113: Joint portion 114: strips or bands 115: Opening 116: Blade tip 120: Detachable spoiler 130: Development Direction 200: Rotor Blade System 201: Wind turbine blades 204: Suction side and / or pressure side surface 208: Connection System 209: Aerodynamic drag components 210: Vibration damping device 217a: Mounting bracket 217b: Mounting bracket 218a: Hook and loop fasteners 218b: Hook and loop fasteners 220: Detachable spoiler 221a: First component 221b: First component 222a: Edge (First Edge) 222b: Edge (First Edge) 223a: Second side 223b: Second side 500: Rotor Blade System 501: Wind turbine blade 505: Forefront 506: Trailing edge 508: Connection System 509a: Aerodynamic drag components 509b: Aerodynamic drag components 510: Vibration damping device 550: Wind turbine 551: Wind turbine tower 552: Cabin 553: Rotor hub 560a: Mounting bracket 560b: Mounting bracket 561a: Clamping component 562b: Clamping component 563: Circular spring (contact component) 564a: Tightening component 564b: Tightening component 600: Rotor Blade System 601: Rotor blade 605: Forefront 606: Trailing edge 608: Connection System 609a: Aerodynamic drag components 609b: Aerodynamic drag components 610: Device 614: items 615a: Narrow aperture 615b: Narrow aperture 670: Joint portion 800: Wind turbine blade system 801: Rotor blades 820: Detachable spoiler 875: Connecting cable 876: Development Direction dt: distance le: Vertical range leb: Vertical range we: Width range

Claims

1. A vibration damping device (110) for damping the vibration of a wind turbine blade (101) during idling, stationary operation, transportation, or maintenance, comprising: A detachable spoiler (120) detachably connected to the rotor blade (101) provides aerodynamic drag in a direction (102) substantially parallel to a mean local chord line (103) of the rotor blade, wherein the detachable spoiler (120) includes: a connection system (108) configured to contact the blade and for mounting the vibration damping device (110) on the blade; one or more aerodynamic drag members (109a, 109b) coupled to the connection system (108) and providing aerodynamic drag in a direction (102) perpendicular to a main extension plane of a drag member, wherein the main extension plane of the drag member is oriented substantially perpendicular to the mean local chord line (103) of the blade, wherein the connection system is configured to partially contact or couple to a suction-side surface and / or a pressure-side surface of the blade. The connection system (108) includes a joining portion (113) for receiving at least a portion of the suction side surface (104) and / or the pressure side surface of the blade.

2. The vibration damping device of claim 1, wherein the detachable spoiler (120) extends and / or protrudes from the blade surface (104) in a direction (107) generally perpendicular to the partial chord line (103) of the blade when connected to the blade (101).

3. The vibration damping device of claim 1, wherein when the device is mounted on the blade, the drag members (109a, 109b) are arranged in one of the spanwise directions parallel to the blade (130), and / or one of the first air drag members (109b) protrudes perpendicularly to the average local chord line away from the pressure side surface, and / or one of the second air drag members (109a) protrudes perpendicularly to the average local chord line away from the suction side surface (104).

4. The vibration damping device of claim 1, wherein at least one air resistance member (109a, 109b) comprises an extruded material or near-extruded material extending in a longitudinal direction to a longitudinal extent (le) and in a width direction to a width extent (we).

5. The vibration damping device of claim 1, wherein at least one aerodynamic drag member (109a, 109b) comprises at least one shape that is sufficiently rigid and / or has a surface that serves as an aerodynamic brake.

6. The vibration damping device of claim 1, wherein the connection system (108) includes a strip or rope for wrapping around the outer surface of the blade and passing through two through holes (115) of the joint portion (113) to secure the joint portion (113) to the blade.

7. The vibration damping device (600) of claim 1 above, wherein the joint portion (670) is integrally formed with the one or more aerodynamic drag members (609a, 609b).

8. A vibration damping device (110) for damping the vibration of a wind turbine blade (101) during idling, stationary operation, transportation, or maintenance, comprising: A detachable spoiler (120) detachably connected to the rotor blade (101) to provide aerodynamic drag in a direction (102) substantially parallel to one of the average local chord lines (103) of the rotor blade, wherein the detachable spoiler (120) includes: a connection system (108) configured to contact the blade and for mounting the vibration damping device (110) on the blade; one or more aerodynamic drag members (109a, 109b) coupled to the connection system (108) and providing aerodynamic drag in a direction (102) perpendicular to a main extension plane of a drag member, wherein the main extension plane of the drag member is oriented substantially perpendicular to the average local chord line (103) of the blade, wherein the connection system is configured to partially contact or couple to a suction-side surface and / or a pressure-side surface of the blade, wherein the connection system (208) includes: At least one mounting member (217a, 217b) connected to at least one aerodynamic drag member (209); a hook-and-loop fastener (218a, 218b) or a touch-sensitive fastener comprising a first component (221a, 221b) and a second component, wherein the first component (221a, 221b) is one of a hook and a loop, and the second component is the other of the hook and the loop, the second component being detachably engaged with the first component, wherein the first component (221a, 221b) is attached to the blade (101), wherein the second component is coupled to the mounting member (217a, 217b), wherein the first component and the second component are engaged in order to mount the mounting member to the blade.

9. The vibration damping device of claim 8, wherein the mounting member (217a, 217b) has a first side (222a, 222b) that is complementary to the shape of the blade surface and a second side (223a, 223b) to which the resistance member (209) is attached.

10. The vibration damping device (510) as claimed in claim 1 above, wherein the connection system comprises: At least one mounting bracket (560a, 560b) is connected to at least one aerodynamic drag member (509a, 509b), the at least one mounting bracket (560a, 560b) is configured to partially engage or surround a portion of a leading edge (505) or a trailing edge (506) of the blade (601), and has one or more clamping members (561a, 562b) that are pushed against each other by circular springs to clamp (including press-fit and / or form fit) the mounting bracket to the blade (501).

11. A rotor blade system (100), comprising: A rotor blade (101); a vibration damping device (110) of any of claims 1 to 10, which is mounted on the rotor blade.

12. A wind turbine (550), comprising: A rotor hub (553) or rotor on which at least one or more rotor blade systems (500) are mounted, wherein at least one rotor blade system is configured according to request 11.

13. A method for attenuating the vibration of a wind turbine blade (101) during idling, stationary operation, transportation, or maintenance, comprising: The detachable spoiler (120) of any one of the requests 1 to 12 is detachably connected to the rotor blade, thereby providing aerodynamic drag in one of the directions (102) that is substantially parallel to the average local chordal direction (103) of the blade (101).

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