Novel floating fan damping device

Abstract

The invention discloses a novel floating fan damping device, and particularly relates to the field of ocean engineering, the novel floating fan damping device comprises a floating fan body, and the floating fan body comprises a damper shell fixedly mounted at the top of a fan tower. When the floating fan body vibrates, the flowing direction of the damping liquid is consistent with or opposite to the vibration direction of the floating fan body, so that reverse damping force is provided, and the vibration reduction effect is improved. Due to the introduction of water, the motion amplitude of the mass block is reduced; when the fan vibrates, the mass block can move in the damping liquid and drive the liquid to shake. The wave effect is generated by the shaking, the vibration energy can be dissipated, the dynamic response of the fan structure is reduced, and the effects of buffering and adjusting the movement of the mass block are also achieved. Meanwhile, energy can be absorbed and released through the characteristics, and the damping effect of the damper is further enhanced. The vibration reduction structure adopts a passive structure, so that the effects of quick vibration response and effective vibration reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean engineering, and specifically to a novel vibration damping device for floating wind turbines. Background Art

[0002] In recent years, with the increasing global demand for clean energy, offshore wind power has attracted much attention due to its superior wind energy resources. However, since floating wind turbines are located in complex marine environments, various environmental loads such as wind, waves, and currents make the problems of structural vibration and stability particularly prominent. Especially under extreme weather conditions such as typhoons and storms, the structural vibration of floating wind turbines may cause resonance, leading to structural fatigue and even damage. Therefore, how to effectively reduce the vibration of floating wind turbines during operation and improve the safety and stability of the system has become one of the current research hotspots.

[0003] In the research on vibration damping of floating wind turbines, the Tuned Liquid Mass Damper (TLMD), as a passive vibration damping device, has been widely used due to its advantages such as simple structure, low cost, and low energy consumption. The working principle of TLMD is to provide a reaction force through the vibration of the liquid in the container to reduce the amplitude of the structure. Introducing the TLMD device in floating wind turbines can effectively tune the natural frequency of the wind turbines and reduce the vibration response caused by environmental loads. However, due to the complex dynamic characteristics of the marine environment, the vibration damping effect of a single TLMD device is still limited under some extreme working conditions. Therefore, improved vibration damping devices based on TLMD are being explored, and the vibration damping efficiency is improved by means of improving the arrangement method of the liquid mass and optimizing the structural design.

[0004] Most traditional dampers for floating wind turbines require an electrical system or energy supply. When the floating wind turbine vibrates, the response speed of the damper is slow and it cannot quickly and efficiently reduce the vibration. Therefore, the inventor of the present invention provides a novel vibration damping device for floating wind turbines to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide a novel vibration damping device for floating wind turbines, achieving the effects of fast vibration response and effective vibration reduction.

[0006] The purpose of the present invention can be realized through the following technical solutions: A new type of vibration damping device for a floating wind turbine, comprising a floating wind turbine body, wherein the floating wind turbine body includes a damper housing fixedly installed at the top of a wind turbine tower. An anti-vibration mechanism is arranged inside the damper housing. The anti-vibration mechanism includes a mass block that can move parallelly. A receiving groove is formed at the bottom of the mass block, and a movable piston is slidably connected inside the receiving groove. A connecting rod is fixedly connected to the bottom of the piston. A water inlet pipe communicating with the receiving groove is fixedly connected to the top of the mass block. The left side of the mass block is connected to the damper housing through a connecting mechanism.

[0007] As a further scheme of the present invention: An appropriate amount of damping liquid is arranged inside the damper housing.

[0008] As a further scheme of the present invention: A pair of mirror-symmetrical arc-shaped blocks are fixedly connected to the front and rear ends of the inner bottom side of the damper housing. A path groove is formed inside the arc-shaped block. A sliding rod is slidably connected inside the two path grooves, and the sliding rod is fixedly connected to the connecting rod.

[0009] As a further scheme of the present invention: The path groove is a symmetric arc protruding upward.

[0010] As a further scheme of the present invention: The connecting mechanism includes a hollow block fixedly connected to the left side inside the damper housing. A sliding block is slidably connected inside the hollow block. The left side of the sliding block is fixedly connected to the mass block. A movable moving plate is arranged inside the hollow block. A connecting spring is fixedly connected to the right side of the moving plate, and the right side of the connecting spring is fixedly connected to the sliding block.

[0011] As a further scheme of the present invention: A sliding groove is formed at the bottom of the hollow block. A connecting block is fixedly connected to the plating part of the moving plate. The bottom of the connecting block passes through the sliding groove, and the bottom of the connecting block is fixedly connected to a first tooth plate. A gear is meshed with the bottom of the first tooth plate, and a second tooth plate is meshed with the bottom of the gear. The right side of the second tooth plate is fixedly connected to the mass block.

[0012] As a further scheme of the present invention: A pair of mirror-symmetrical guide rails are respectively fixedly connected to the front and rear sides of the hollow block, and the pair of guide rails are respectively slidably connected to the first tooth plate.

[0013] As a further scheme of the present invention: Mirror-symmetrical L-shaped support plates are respectively fixedly connected to the front and rear sides of the hollow block. A rotating rod is rotatably connected to the inside of the two L-shaped support plates, and the rotating rod is fixedly connected to the gear.

[0014] As a further scheme of the present invention: The damper housing is installed near the nacelle position.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the floating wind turbine body vibrates, the flow direction of the damping liquid is the same as or opposite to the vibration direction of the floating wind turbine body, thereby providing a reverse damping force and enhancing the vibration damping effect. And due to the introduction of water, the motion amplitude of the mass block is reduced, the space occupied by the vibration damping mechanism is reduced, and the space utilization rate in the nacelle is improved. This design takes into account the complex load effects in the marine environment, enabling the vibration damping mechanism to adapt to vibrations in multiple directions and maintain an efficient energy dissipation effect; at the same time, the mass blocks in the damping liquid are connected by a connecting mechanism. When the wind turbine vibrates, the mass blocks will move in the damping liquid and drive the sloshing of the liquid. This sloshing generates a wave effect that can dissipate vibration energy, thereby reducing the dynamic response of the wind turbine structure. At the same time, the connecting mechanism not only connects the mass blocks but also plays a role in buffering and regulating the movement of the mass blocks. It allows the mass blocks to move freely within a certain range, and at the same time can absorb and release energy through its characteristics, further enhancing the vibration damping effect of the damper. The above vibration damping structure adopts a passive structure, achieving the effects of rapid vibration response and effective vibration mitigation; 2. When the mass block moves to the right, it will drive the sliding block to move in the same direction, stretching the connecting spring. The elastic force after the connecting spring is stretched acts on the mass block. Similarly, when the sliding block moves to the left, the connecting spring is compressed, and the elastic force after the connecting spring is compressed acts on the mass block; the connecting spring, as an elastic element connecting the mass block and the damper housing, has a significant buffering effect. When the wind turbine is subjected to external excitations (such as wind, waves, etc.), the connecting spring can absorb and relieve vibration energy, preventing the mass block from directly hitting the outer shell or other components of the damper, thereby protecting the various components inside the damper from damage. And the connecting spring can store and release energy during the compression and release processes. When the mass block moves in the damping liquid, the connecting spring will be compressed or released accordingly, converting the vibration energy into the potential energy of the connecting spring and releasing this energy at an appropriate time, thereby further dissipating the vibration energy. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall device of a new type of floating wind turbine vibration damping device; Figure 2 It is a schematic diagram of the internal structure of the damper housing in a new type of floating wind turbine vibration damping device; Figure 3 It is a schematic diagram of the connection between the vibration damping mechanism and the connecting mechanism in a new type of floating wind turbine vibration damping device; Figure 4 It is a sectional structure schematic diagram of the vibration damping mechanism and the connecting mechanism in a new type of floating wind turbine vibration damping device; Figure 5 It is a bottom view structure schematic diagram of the vibration damping mechanism and the connecting mechanism in a new type of floating wind turbine vibration damping device; Figure 6 It is a schematic right - view structure diagram of a connecting mechanism in a new - type floating wind turbine vibration - damping device.

[0017] In the figure: 10, floating wind turbine body; 20, damper housing; 30, vibration - damping mechanism; 301, mass block; 302, water inlet pipe; 303, piston; 304, connecting rod; 305, arc - shaped block; 306, path groove; 307, sliding rod; 308, receiving groove; 40, connecting mechanism; 401, hollow block; 402, sliding block; 403, moving plate; 404, connecting spring; 405, sliding groove; 406, connecting block; 407, first toothed plate; 408, gear; 409, second toothed plate; 410, guide rail; 411, L - shaped support plate; 412, rotating rod. Specific embodiments

[0018] As Figure 1-4 shown, a new - type floating wind turbine vibration - damping device includes a floating wind turbine body 10. The floating wind turbine body 10 includes a damper housing 20 fixedly installed at the top of the wind turbine tower. Inside the damper housing 20, a vibration - damping mechanism 30 is provided. The vibration - damping mechanism 30 includes a mass block 301 that can move parallelly. At the bottom of the mass block 301, a receiving groove 308 is formed. Inside the receiving groove 308, a movable piston 303 is slidably connected. The bottom of the piston 303 is fixedly connected to a connecting rod 304; at the top of the mass block 301, a water inlet pipe 302 communicating with the receiving groove 308 is fixedly connected; the left side of the mass block 301 is connected to the damper housing 20 through a connecting mechanism 40.

[0019] Preferably, the damper housing 20 is installed near the nacelle position. This layout utilizes the center - of - gravity characteristics of the wind turbine, enabling the damper to more effectively suppress the vibration amplitude at the top of the tower, especially for high - amplitude and low - frequency vibration modes. This installation method not only improves the vibration - damping efficiency but also reduces the need for modification of the bottom support structure.

[0020] Preferably, an appropriate amount of damping liquid is injected into the damper housing 20. The damping liquid is water, and the damping liquid covers the top of the mass block 301.

[0021] When the floating wind turbine body 10 vibrates, the flow direction of the damping liquid is the same as or opposite to the vibration direction of the floating wind turbine body 10, thereby providing a reverse damping force and enhancing the vibration damping effect. And due to the introduction of water, the motion amplitude of the mass block 301 is reduced, the space occupied by the vibration damping mechanism 30 is reduced, and the space utilization rate in the nacelle is improved. This design takes into account the complex load effects in the marine environment, enabling the vibration damping mechanism 30 to adapt to vibrations in multiple directions and maintain an efficient energy dissipation effect; at the same time, the mass blocks 301 in the damping liquid are connected by the connecting mechanism 40. When the wind turbine vibrates, the mass blocks 301 will move in the damping liquid and drive the sloshing of the liquid. This sloshing generates a wave effect that can dissipate vibration energy, thereby reducing the dynamic response of the wind turbine structure. At the same time, the connecting mechanism 40 not only connects the mass blocks 301 but also plays a role in buffering and regulating the movement of the mass blocks 301. It allows the mass blocks 301 to move freely within a certain range, and at the same time, it can absorb and release energy through its characteristics, further enhancing the vibration damping effect of the damper.

[0022] Specifically, a pair of mirror-symmetrical arc-shaped blocks 305 are fixedly connected to the front and rear ends of the inner bottom of the damper housing 20. A path groove 306 is formed inside the arc-shaped block 305. A sliding rod 307 is slidably connected inside the two path grooves 306, and the sliding rod 307 is fixedly connected to the connecting rod 304.

[0023] Preferably, the path groove 306 is a symmetric arc protruding upward; when the floating wind turbine body 10 vibrates, it will cause the mass block 301 to move in the damping liquid in the clockwise force application direction. When the mass block 301 moves left or right, it will drive the sliding rod 307 to slide along the inside of the path groove 306 through the connecting rod 304. Since the path groove 306 is an arc protruding upward, when the sliding rod 307 moves left or right, its position will gradually become lower, thereby driving the connecting rod 304 and the piston 303 to move downward, so that the piston 303 makes the air pressure in the accommodation groove 308 unbalanced, and thus the damping liquid enters the inside of the accommodation groove 308 through the water inlet pipe 302, making the overall weight of the mass block 301 increase. The increased gravity of the mass block 301 is proportional to the moving distance of the mass block 301; the increase in the mass of the mass block 301 means that the damper can absorb and dissipate more energy during vibration. Because the generation of the damping force is related to the movement of the mass block 301 and the sloshing of the liquid, the increase in mass will enhance this sloshing effect, thereby more effectively reducing the vibration of the wind turbine; At the same time, the natural frequency of the vibration damping mechanism 30 is closely related to the mass of the mass block 301 inside it. If the mass of the mass block 301 can be dynamically adjusted, then the natural frequency of the damper can also be adjusted accordingly to more precisely match the tower frequency of the wind turbine unit. This helps to enhance the vibration damping effect of the damper at a specific frequency.

[0024] Reference Figure 2-6 The connecting mechanism 40 includes a hollow block 401 fixedly connected to the left side inside the damper housing 20. A sliding block 402 is slidably connected inside the hollow block 401. The left side of the sliding block 402 is fixedly connected to the mass block 301. A movable moving plate 403 is arranged inside the hollow block 401. A connecting spring 404 is fixedly connected to the right side of the moving plate 403. The right side of the connecting spring 404 is fixedly connected to the moving block 402.

[0025] Preferably, the side surface of the sliding block 402 is adapted to the inner cross-section of the hollow block 401, so as to achieve the effect of guiding and limiting the movement of the sliding block 402.

[0026] When the mass block 301 moves to the right, it will drive the sliding block 402 to move in the same direction, stretching the connecting spring 404. The elastic force after the connecting spring 404 is stretched acts on the mass block 301. Similarly, when the sliding block 402 moves to the left, the connecting spring 404 is compressed, and the elastic force after the connecting spring 404 is compressed acts on the mass block 301. The connecting spring 404, as an elastic element connecting the mass block 301 and the damper housing 20, has a significant buffering effect.

[0027] When the wind turbine is subjected to external excitations (such as wind, waves, etc.), the connecting spring 404 can absorb and relieve the vibration energy, preventing the mass block 301 from directly hitting the outer shell or other components of the damper, thereby protecting the various components inside the damper from damage. And the connecting spring 404 can store and release energy during the compression and release process. When the mass block 301 moves in the damping liquid, the connecting spring 404 will be compressed or released accordingly, converting the vibration energy into the potential energy of the connecting spring 404, and releasing these energies at an appropriate time, thereby further dissipating the vibration energy. At the same time, the elastic characteristics of the connecting spring 404 enable the vibration damping mechanism 30 to respond more quickly to the vibration of the wind turbine. When the floating wind turbine body 10 is subjected to external excitations, the connecting spring 404 can quickly transmit the vibration signal and drive the mass block 301 to move in the damping liquid, thereby generating a vibration damping effect. This rapid dynamic response helps the damper maintain stable vibration damping performance in the complex and changeable marine environment.

[0028] Further, a sliding groove 405 is opened at the bottom of the hollow block 401. A connecting block 406 is fixedly connected to the plating part of the moving plate 403. The bottom of the connecting block 406 passes through the sliding groove 405, and the bottom of the connecting block 406 is fixedly connected to a first toothed plate 407. A gear 408 is engaged with the bottom of the first toothed plate 407. A second toothed plate 409 is engaged with the bottom of the gear 408. The right side of the second toothed plate 409 is fixedly connected to the mass block 301.

[0029] When the mass block 301 moves to the right, it drives the sliding block 402 to move in the same direction, stretching the right end of the connecting spring 404. At the same time, the mass block 301 drives the second toothed plate 409 to move to the right. Through the transmission between the second toothed plate 409 and the gear 408, the first toothed plate 407 moves to the left, causing the moving plate 403 to drive the left end of the connecting spring 404 to move to the left, stretching both ends of the connecting spring 404 outward simultaneously; when the mass block 301 moves to the left, it drives the sliding block 402 to move in the same direction, moving the right end of the connecting spring 404 to the left. At the same time, the mass block 301 drives the second toothed plate 409 to move to the left. Through the transmission between the second toothed plate 409 and the gear 408, the first toothed plate 407 moves to the right, thereby driving the moving plate 403 and the left end of the connecting spring 404 to move to the right, compressing both ends of the connecting spring 404 toward the middle simultaneously; when both ends of the connecting spring 404 are stretched outward simultaneously, the elongation of the connecting spring 404 increases. According to Hooke's law (F = kx), the elastic force (i.e., the damping force) generated by the connecting spring 404 will also increase accordingly. This helps to enhance the damping device's ability to absorb and dissipate vibration energy. On the contrary, when both ends of the connecting spring 404 are squeezed toward the middle, the compression of the connecting spring 404 increases. Similarly, according to Hooke's law, the elastic force generated by the connecting spring 404 also increases, but at this time, it acts as a compression force on the mass block 301. This compression force also helps to convert the vibration energy into the potential energy of the spring and release it at an appropriate time.

[0030] Preferably, a pair of mirror-symmetrical guide rails 410 are fixedly connected to the front and rear sides of the hollow block 401 respectively. The pair of guide rails 410 are respectively slidably connected to the first toothed plate 407; thus, the effect of guiding the movement of the first toothed plate 407 is achieved.

[0031] Preferably, mirror-symmetrical L-shaped support plates 411 are fixedly connected to the front and rear sides of the hollow block 401 respectively. A rotating rod 412 is rotatably connected to the inner sides of the two L-shaped support plates 411, and the rotating rod 412 is fixedly connected to the gear 408.

[0032] The comparison between the present invention and traditional dampers has the following effects: 1. High-efficiency vibration suppression: The vibration damping mechanism 30 can offset the vibration energy of the structure through the reaction force of the liquid in the container, significantly reducing the vibration amplitude of the floating wind turbine under complex loads such as wind and waves. Especially near the resonance frequency, the vibration damping mechanism 30 can effectively tune the natural frequency of the system, reduce the vibration response, and improve the overall stability of the structure. 2. Low cost and easy maintenance: The vibration damping mechanism 30 has a simple structure and usually does not require a complex electrical system or energy supply, so its manufacturing and installation costs are relatively low.

[0033] In addition, the vibration damping mechanism 30 belongs to a passive vibration damping device and does not require an active control system during operation. Therefore, it has low maintenance requirements and a long service life, making it suitable for use in floating wind turbines in remote sea areas. 3. Strong adaptability and suitable for extreme working conditions: The newly designed vibration damping mechanism 30 can adjust the liquid mass or optimize the structural layout according to different marine working conditions, thereby improving its vibration damping performance. Especially under extreme climate conditions such as typhoons, the device can improve the wind resistance and wave resistance of the wind turbine through its adaptive vibration damping effect, and reduce the fatigue damage caused by extreme loads.

[0034] The working principle of the present invention is as follows: When the floating wind turbine body 10 vibrates, the flow direction of the damping liquid is the same as or opposite to the vibration direction of the floating wind turbine body 10, thereby providing a reverse damping force to enhance the vibration damping effect. And due to the introduction of water, the movement amplitude of the mass block 301 is reduced, the space occupied by the vibration damping mechanism 30 is reduced, and the space utilization rate in the nacelle is improved. This design takes into account the complex load effects in the marine environment, enabling the vibration damping mechanism 30 to adapt to vibrations in multiple directions and maintain an efficient energy dissipation effect; at the same time, the mass blocks 301 in the damping liquid are connected by the connecting mechanism 40. When the wind turbine vibrates, the mass blocks 301 will move in the damping liquid and drive the sloshing of the liquid. This sloshing generates a wave effect that can dissipate vibration energy, thereby reducing the dynamic response of the wind turbine structure. At the same time, the connecting mechanism 40 not only connects the mass blocks 301, but also plays a role in buffering and regulating the movement of the mass blocks 301. It allows the mass blocks 301 to move freely within a certain range, and at the same time can absorb and release energy through its characteristics, further enhancing the vibration damping effect of the damper.

Claims

1. A new type of vibration damping device for a floating wind turbine, comprising a floating wind turbine body (10), wherein the floating wind turbine body (10) includes a damper housing (20) fixedly installed at the top of a wind turbine tower, and is characterized in that, Inside the damper housing (20), a vibration damping mechanism (30) is provided. The vibration damping mechanism (30) includes a mass block (301) that can move parallelly. A receiving groove (308) is formed at the bottom of the mass block (301). A movable piston (303) is slidably connected inside the receiving groove (308). A connecting rod (304) is fixedly connected to the bottom of the piston (303). A water inlet pipe (302) communicating with the receiving groove (308) is fixedly connected to the top of the mass block (301). The left side of the mass block (301) is connected to the damper housing (20) through a connecting mechanism (40).

2. A novel vibration damping device for a floating wind turbine according to claim 1, characterized in that, An appropriate amount of damping fluid is provided inside the damper housing (20).

3. The novel floating wind turbine vibration damping device according to claim 1, wherein At the front and rear ends of the inner bottom of the damper housing (20), a pair of mirror-symmetrical arc-shaped blocks (305) are fixedly connected. A path groove (306) is formed inside the arc-shaped block (305). A sliding rod (307) is slidably connected inside the two path grooves (306). The sliding rod (307) is fixedly connected to the connecting rod (304).

4. A novel floating wind turbine vibration damping device according to claim 3, characterized in that, The path groove (306) is a symmetric arc protruding upward.

5. A novel floating wind turbine vibration damping device according to claim 1, characterized in that, The connecting mechanism (40) includes a hollow block (401) fixedly connected to the left side inside the damper housing (20). A sliding block (402) is slidably connected inside the hollow block (401). The left side of the sliding block (402) is fixedly connected to the mass block (301). A movable moving plate (403) is provided inside the hollow block (401). A connecting spring (404) is fixedly connected to the right side of the moving plate (403). The right side of the connecting spring (404) is fixedly connected to the sliding block (402).

6. The novel floating wind turbine vibration damping device according to claim 5, wherein, A sliding groove (405) is formed at the bottom of the hollow block (401). A connecting block (406) is fixedly connected to the plating part of the moving plate (403). The bottom of the connecting block (406) passes through the sliding groove (405), and the bottom of the connecting block (406) is fixedly connected to a first toothed plate (407). A gear (408) is engaged with the bottom of the first toothed plate (407). A second toothed plate (409) is engaged with the bottom of the gear (408). The right side of the second toothed plate (409) is fixedly connected to the mass block (301).

7. A novel floating wind turbine vibration damping device according to claim 5, characterized in that, A pair of mirror-symmetrical guide rails (410) are respectively fixedly connected to the front and rear sides of the hollow block (401). The pair of guide rails (410) are respectively slidably connected to the first toothed plate (407).

8. A novel floating wind turbine vibration damping device according to claim 5, characterized in that, Mirror-symmetrical L-shaped support plates (411) are respectively fixedly connected to the front and rear sides of the hollow block (401). A rotating rod (412) is rotatably connected to the inside of the two L-shaped support plates (411). The rotating rod (412) is fixedly connected to the gear (408).

9. A novel vibration damping device for a floating wind turbine according to claim 1, characterized in that, The damper housing (20) is installed near the engine room position.

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