Tuned liquid damper and vortex reduction and vibration attenuation assembly

Abstract

The utility model discloses a tuned liquid damper and vortex reduction vibration attenuation subassembly, relates to wind turbine generator vibration attenuation technical field, including fixed frame and damper water tank, fixed frame, damper platform, damper water tank fixed connection, fixed frame side is provided with fixed piece, fixed piece and fixed frame pass through fastener connection, fixed frame top is provided with pressing piece, fixed frame top is provided with the damper water tank. The pressing piece is connected with the fixing frame through a fastening piece; the damper water tank is arranged in the fixing frame, and damping liquid is contained in the damper water tank; the fixing piece can move in the horizontal direction, and therefore the damper water tank is clamped from the side face of the damper water tank. The pressing piece can move in the vertical direction so as to clamp the damper water tank from the top of the damper water tank. According to the tuned liquid damper and the vortex reduction and vibration attenuation assembly, the tuned liquid damper is fixedly connected with the inner wall of the tower drum and the damper platform, safety and stability are achieved, the set damping effect is achieved, and meanwhile disassembly, assembly and maintenance are convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine vibration reduction, in particular to a tuning liquid damper and a vortex reduction vibration reduction component. Background Art

[0002] As wind turbines develop towards larger megawatts, the height of the tower is becoming higher and higher. As the main load-bearing component of the wind turbine, the risk of vortex-induced vibration is also increasing. Excessive vibration amplitude of the tower body can cause the tower to seriously bend, tilt, or even break.

[0003] At present, there are two structural forms of tuned liquid dampers for reducing vortex and vibration in towers. One is to fix the damper directly on the inner wall of the tower. However, this structural form is unstable and poses a great safety hazard under the action of continuous and strong wind loads. It is very easy to cause structural damage and leakage of damping liquid. The other is to fix the damper directly on the damper platform. In the second structural form directly fixed on the platform, the force path is transmitted from the damper to the platform and then to the tower. Compared with the form in which the damper is directly transmitted to the tower wall, the damping effect is weakened and it is inconvenient to disassemble and maintain. Therefore, there are still shortcomings and deficiencies in the prior art. Utility Model Content

[0004] The utility model aims to provide a tuned liquid damper and a vortex reduction vibration reduction component, which solves the technical problems of the current structure of the tuned liquid damper, such as potential safety hazards, weak damping effect and inconvenient disassembly.

[0005] To achieve the above object, the utility model provides a tuned liquid damper, comprising:

[0006] A fixing frame is fixedly connected to the damper platform and the tower, a fixing piece is arranged on the side of the fixing frame, the fixing piece is connected to the fixing frame through a fastener, and a pressing piece is arranged on the top of the fixing frame, the pressing piece is connected to the fixing frame through a fastener;

[0007] A damper water tank is arranged in the fixing frame and contains damping fluid;

[0008] Wherein, the fixing member can move in a horizontal direction so as to clamp the damper water tank from the side of the damper water tank; the pressing member can move in a vertical direction so as to clamp the damper water tank from the top of the damper water tank.

[0009] Preferably, the fixing member comprises:

[0010] Two baffles, both ends of the baffles are provided with first strip holes, the first strip holes are arranged in a horizontal direction, the two baffles are arranged in parallel, the baffles are detachably connected to the fixing frame by bolts, and the bolts pass through the first strip holes;

[0011] A connecting plate is arranged between the two baffles, and two ends of the connecting plate are respectively fixedly connected with the two baffles.

[0012] Preferably, second strip-shaped holes are arranged at two ends of the pressing member, the second strip-shaped holes are arranged in the vertical direction, and the pressing member is detachably connected with the fixed frame through bolts, and the bolts pass through the second strip-shaped holes.

[0013] Preferably, fixing lugs are further arranged on the fixed frame, the fixing lugs are L-shaped, one side of the fixing lugs is fixedly connected with the fixed frame, and the other side of the fixing lugs is used for being fixedly connected with the tower barrel through bolts.

[0014] Preferably, the number of the fixing members is two, and the two fixing members are arranged adjacent to each other on the side surface of the fixed frame.

[0015] Preferably, grooves are arranged on the inner surface of the damper water tank.

[0016] Preferably, buffer strips are arranged on the inner side surface of the fixed frame.

[0017] Preferably, threaded holes are arranged at the bottom of the fixed frame for fixedly connecting the fixed frame with the damper platform through bolts.

[0018] Preferably, a fixing plate is fixedly connected to the bottom of the fixed frame, and a protective layer is arranged on the top surface of the fixing plate.

[0019] The present utility model further provides a vortex reduction and vibration damping assembly, which includes the tuned liquid damper provided in any one of the above technical solutions.

[0020] Compared with the above background technology, for the tuned liquid damper and the vortex reduction and vibration damping assembly provided by the present utility model, the tuned liquid damper adopts an installation method of being fixedly connected to both the inner wall of the tower barrel and the damper platform, which is both safe and stable and can achieve the established damping effect, thereby reducing the risk brought by vortex-induced vibration to the flexible steel tower and ensuring the safety and stability of the tower barrel; at the same time, a plurality of threaded holes at the bottom of the fixed frame are fixedly connected with the matching holes on the damper platform through bolts, and the fixing lugs on the fixed frame are fixedly connected with the welding studs on the inner wall of the tower barrel through bolts, which is convenient for disassembly and maintenance. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0022] Figure 1 Structural schematic diagram of the vortex reduction and vibration damping component provided by the embodiment of the present utility model;

[0023] Figure 2 Structural schematic diagram of the tuned liquid damper provided by the embodiment of the present utility model;

[0024] Figure 3 is Figure 2 Structural schematic diagram from another perspective;

[0025] Figure 4 is Figure 2 Structural schematic diagram of the installation frame in the shown tuned liquid damper.

[0026] Figures 1 to 4 In the figure, reference numerals: 100, tuned liquid damper; 10, installation frame; 11, fixed frame; 111, threaded hole; 112, fixed ear plate; 12, fixed plate; 13, fixing member; 131, baffle plate; 1311, first strip-shaped hole; 132, connecting plate; 14, pressing member; 141, second strip-shaped hole; 20, damper water tank; 200, tower barrel; 300, damper platform. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0029] The present utility model provides a tuned liquid damper 100 and a vortex reduction and vibration damping component. The tuned liquid damper 100 adopts an installation method that is fixedly connected to both the inner wall of the tower barrel 200 and the damper platform 300. It is both safe and stable, can achieve the established damping effect, and is convenient for disassembly, installation and maintenance. Thus, it can reduce the risk brought by vortex-induced vibration to the flexible steel tower and ensure the safety and stability of the tower barrel 200.

[0030] Please refer to Figure 2 and Figure 3 together. The tuned liquid damper 100 provided by the present utility model includes an installation frame 10 and a damper water tank 20.

[0031] The installation frame 10 is used to fixedly install the damper water tank 20. The damper water tank 20 is used to hold damping liquid. The damping liquid relies on the viscous resistance of the liquid medium to attenuate the kinetic energy of the moving machinery, shorten the mechanical swing or movement time, thereby playing a role in reducing vortex and damping vibration. The installation frame 10 is detachably and fixedly connected to the damper platform 300, and the installation frame 10 is detachably and fixedly connected to the inner wall of the tower barrel 200.

[0032] Please refer to Figures 2 to 4 as well. The installation frame 10 includes a fixed frame 11, a fixed plate 12, a fixing member 13 and a pressing member 14. The fixing member 13 and the pressing member 14 are respectively used to clamp the damper water tank 20 from the side and top of the damper water tank 20, so as to play a fixing role and prevent the damper water tank 20 from moving during use.

[0033] The fixed frame 11 is generally in the shape of a rectangular frame structure. The fixed plate 12 is located at the bottom of the fixed frame 11. The fixed plate 12 is fixedly connected to the fixed frame 11. The fixed frame 11 and the fixed plate 12 enclose a rectangular box-like structure with an open top. The damper water tank 20 is located within the box-like structure formed by the fixed frame 11 and the fixed plate 12, and the damper water tank 20 is placed on the fixed plate 12. In this embodiment, the fixed frame 11 is welded by square tubes and steel parts, and the fixed frame 11 and the fixed plate 12 are fixedly connected by welding.

[0034] A number of threaded holes 111 are provided at the bottom of the fixed frame 11 for fixedly connecting the fixed frame 11 to the damper platform 300 by bolts, which is convenient for installation and disassembly. The threaded holes 111 are evenly distributed on the fixed frame 11.

[0035] Fixed lugs 112 are also provided on the fixed frame 11 for fixedly connecting the fixed frame 11 to the inner wall of the tower barrel 200. Among them, the fixed lugs 112 are in an L shape. One side of the fixed lugs 112 is fixedly connected to the fixed frame 11, and the other side of the fixed lugs 112 is fixedly connected to the inner wall of the tower barrel 200 by bolts. Through such a setting, the fixed connection between the damper and the tower barrel 200 is realized, and the installation and disassembly are convenient.

[0036] Please refer to Figures 2 to 4 as well. The fixing member 13 is arranged on the fixed frame 11, and the fixing member 13 is located on the side of the fixed frame 11. The fixing member 13 is connected to the fixed frame 11 by fasteners and can move horizontally, so as to clamp the damper water tank 20 from the side of the damper water tank 20.

[0037] The fixing member 13 includes a connecting plate 132 and two baffles 131. The baffle 131 is roughly U-shaped. First strip holes 1311 are provided at both ends of the baffle 131. The first strip holes 1311 are arranged in a horizontal direction. The two baffles 131 are arranged in parallel. The connecting plate 132 is arranged between the two baffles 131. The two ends of the connecting plate 132 are respectively fixedly connected to the two baffles 131; the baffle 131 is detachably connected to the fixing frame 11 by bolts, and the bolts pass through the first strip holes 1311 to be fixedly connected to the fixing frame 11.

[0038] In this embodiment, there are two fixing members 13 , which are adjacently arranged on the fixing frame 11 ; there are two connecting plates 132 , which are spaced apart from each other.

[0039] The clamping member 14 is disposed on the fixing frame 11, and is located on the side of the fixing frame 11 away from the fixing plate 12, that is, the top of the fixing frame 11. The clamping member 14 is connected to the fixing frame 11 by fasteners, and can move in the vertical direction, thereby clamping the damper water tank 20 from the top of the damper water tank 20.

[0040] The clamping member 14 is roughly U-shaped, with second strip holes 141 provided at both ends of the clamping member 14 . The second strip holes 141 are provided along the vertical direction. The clamping member 14 is detachably connected to the fixing frame 11 by bolts, and the bolts pass through the second strip holes 141 to be fixedly connected to the fixing frame 11 .

[0041] It should be noted that in this embodiment, the damper water tank 20 is made of high-density polyethylene, which has higher low-temperature resistance, anti-aging, and impact resistance, and can increase the service life of the damper water tank 20. In other embodiments, the damper water tank 20 can be made of other materials, which are not specifically limited.

[0042] In some of the embodiments, the inner surface of the damper water tank 20 is provided with grooves. By providing the grooves, the contact area between the damping fluid in the damper water tank 20 and the damper water tank 20 is increased, and the kinetic energy is attenuated by relying on the viscous resistance of the liquid medium, so that the damper can have a better damping effect.

[0043] In some embodiments, a buffer strip is provided on the inner side of the fixing frame 11, and the buffer strip is made of EPDM (Ethylene Propylene Diene Monomer) rubber material. When the damper water tank 20 is placed in the fixing frame 11, the side of the damper water tank 20 contacts the buffer strip on the inner side of the fixing frame 11, thereby playing a buffering role.

[0044] In some of these embodiments, a protective layer is provided on the top surface of the fixing plate 12. The protective layer is made of nitrile rubber to prevent the collision and damage between the damper water tank 20 and the fixing plate 12 made of steel, and at the same time reduce the risk brought by the thermal expansion and contraction of the damper water tank 20 body.

[0045] The present utility model also provides a vortex reduction and vibration damping assembly, as Figure 1 shown, which includes a tower barrel 200, a damper platform 300, and the tuned liquid damper 100 provided in any of the above embodiments. Among them, the damper platform 300 is fixedly connected to the tower barrel 200, and the tuned liquid damper 100 is fixedly connected to the damper platform 300 and the tower barrel 200.

[0046] The usage process of the tuned liquid damper 100 provided by the present utility model is as follows:

[0047] First, install the tuned liquid damper 100 on the damper platform 300. The multiple threaded holes 111 at the bottom of the fixing frame 11 correspond to the matching holes on the damper platform 300 one by one and are fixedly connected by bolts, which is convenient for installation and disassembly;

[0048] Secondly, fixedly connect the tuned liquid damper 100 to the tower barrel 200. One side of the fixed ear plate 112 is fixedly connected to the fixing frame 11, and the other side of the fixed ear plate 112 is fixedly connected to the welding stud on the inner wall of the tower barrel 200 through a fastener. The fastener uses a bolt, which is convenient for installation and disassembly;

[0049] Then, install the damper water tank 20 into the fixing frame 11. Adjust the fixing member 13 in the horizontal direction to make the baffle 131 abut against the side surface of the damper water tank 20, and after adjustment, fix it by passing a bolt through the first elongated hole 1311; adjust the pressing member 14 in the vertical direction to press the damper water tank 20 from above the damper water tank 20, and after adjustment, fix it by passing a bolt through the second elongated hole 141;

[0050] Finally, inject damping liquid into the damper water tank 20 until the liquid level reaches the specified height and then stop injecting.

[0051] The tuned liquid damper 100 adopts an installation method that is fixedly connected to both the inner wall of the tower barrel 200 and the damper platform 300, which not only ensures safety and stability, realizes the established damping effect, but also is convenient for disassembly, installation and maintenance, can reduce the risk brought by vortex-induced vibration to the flexible steel tower, and ensure the safety and stability of the tower barrel 200. Since the vortex reduction and vibration damping assembly includes the above-mentioned tuned liquid damper 100, it can solve the same technical problems and produce the same technical effects.

[0052] It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0053] In this article, specific examples are used to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. A tuned liquid damper, characterized in that: include: A fixing frame is fixedly connected to the damper platform and the tower, a fixing piece is arranged on the side of the fixing frame, the fixing piece is connected to the fixing frame through a fastener, and a pressing piece is arranged on the top of the fixing frame, the pressing piece is connected to the fixing frame through a fastener; A damper water tank is arranged in the fixing frame and contains damping fluid; Wherein, the fixing member can move in a horizontal direction so as to clamp the damper water tank from the side of the damper water tank; the pressing member can move in a vertical direction so as to clamp the damper water tank from the top of the damper water tank.

2. The tuned liquid damper according to claim 1, characterized in that: The fixing member comprises: Two baffles, both ends of the baffles are provided with first strip holes, the first strip holes are arranged in a horizontal direction, the two baffles are arranged in parallel, the baffles are detachably connected to the fixing frame by bolts, and the bolts pass through the first strip holes; A connecting plate is arranged between the two baffles, and two ends of the connecting plate are respectively fixedly connected to the two baffles.

3. The tuned liquid damper according to claim 1, characterized in that: The two ends of the clamping member are provided with second strip holes, the second strip holes are arranged along the vertical direction, and the clamping member is detachably connected to the fixing frame by bolts, and the bolts pass through the second strip holes.

4. The tuned liquid damper according to claim 1, characterized in that: The fixing frame is also provided with a fixing ear plate, which is L-shaped, one side of which is fixedly connected to the fixing frame, and the other side of which is fixedly connected to the tower by bolts.

5. The tuned liquid damper according to claim 2, characterized in that: The number of the fixing members is two, and the two fixing members are adjacently arranged on the side of the fixing frame.

6. The tuned liquid damper according to claim 1, characterized in that The inner surface of the damper water tank is provided with a groove.

7. The tuned liquid damper according to claim 1, characterized in that: A buffer strip is arranged on the inner side surface of the fixing frame.

8. The tuned liquid damper according to claim 1, characterized in that The bottom of the fixing frame is provided with threaded holes for fixing the fixing frame and the damper platform with bolts.

9. The tuned liquid damper according to claim 1, characterized in that: A fixing plate is fixedly connected to the bottom of the fixing frame, and a protective layer is arranged on the top surface of the fixing plate.

10. A vortex reduction and vibration reduction assembly, characterized in that: A tuned liquid damper comprising any one of claims 1 to 9.

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