A floating wind turbine foundation platform capable of absorbing wave current energy

Abstract

This invention belongs to the field of offshore wind power technology, specifically disclosing a floating wind turbine foundation platform capable of absorbing wave and current energy. It includes a central buoy and multiple outer buoys arranged in a ring around its periphery. The outer buoys are fixedly connected to the central buoy via connecting beams. Each buoy is movably connected to an energy-absorbing support, including a central sleeve fitted onto the central buoy, an outer sleeve fitted onto the outer buoys, and a support rib fixedly connecting the central sleeve and the outer sleeve. An electromagnetic coil is sealed inside the outer sleeve, and a permanent magnet is fixed inside the outer buoy. The electromagnetic coil and the permanent magnet cooperate to convert the kinetic energy of the reciprocating motion of the energy-absorbing support into electrical energy. It also includes an energy-absorbing buoy fitted around the outer periphery of the central buoy and located at the bottom of the energy-absorbing support, used to drive the energy-absorbing support to reciprocate along the axial direction of the central buoy. This invention significantly improves the stability of the platform in complex marine environments, reduces the impact of vortex-induced vibration and large-amplitude movements on the wind turbine, and can also recover wave and current energy to generate electricity.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power technology, and in particular to a floating wind turbine foundation platform capable of absorbing wave current energy. Background Technology

[0002] Offshore wind power, as an important component of clean energy, plays a significant role in optimizing the energy structure and reducing carbon emissions. The wind turbine foundation platform, as a key structure supporting offshore wind turbines, directly affects the turbine's operating efficiency and lifespan. With the development of offshore wind power into deeper waters, floating wind turbine foundation platforms capable of absorbing wave and current energy have become a focus of current technological research and development due to their strong adaptability to water depth and flexible installation.

[0003] Traditional floating wind turbine foundation platforms that absorb wave and current energy typically employ semi-submersible, column-mounted, or tension leg structures, maintaining platform stability through mooring systems. However, in complex marine environments, these platforms are susceptible to wave and current loads, resulting in vortex-induced vibrations and significant motion. This not only affects the wind turbine's power generation efficiency but can also lead to structural fatigue. Existing technologies primarily suppress vibration by optimizing the platform structure or adding damping devices, but these methods often fail to simultaneously achieve vibration reduction and energy capture. Therefore, developing a novel technological solution that can both reduce platform motion and efficiently utilize environmental energy is crucial for improving the economics and reliability of floating wind turbines. Summary of the Invention

[0004] The purpose of this invention is to provide a floating wind turbine foundation platform that can absorb wave current energy, in order to solve the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: a floating wind turbine foundation platform capable of absorbing wave current energy, comprising an intermediate pontoon, with multiple outer pontoons arranged in a ring array around the intermediate pontoon, the multiple outer pontoons being fixedly connected to the intermediate pontoon via connecting beams; an energy-absorbing support is also movably connected to the intermediate pontoon and the outer pontoons, the energy-absorbing support comprising an intermediate sleeve fitted on the intermediate pontoon, an outer sleeve fitted on the outer pontoons, and a support rib fixedly connecting the intermediate sleeve and the outer sleeve; an electromagnetic coil is sealed inside the outer sleeve, and a permanent magnet is fixed inside the outer pontoons, the electromagnetic coil and the permanent magnet cooperating to convert the kinetic energy of the reciprocating motion of the energy-absorbing support into electrical energy; further comprising an energy-absorbing pontoon fitted on the outer periphery of the intermediate pontoon and located at the bottom of the energy-absorbing support, the energy-absorbing pontoon being used to drive the energy-absorbing support to reciprocate along the axial direction of the intermediate pontoon.

[0006] The above technical solution, through the combination of intermediate buoy, outer buoy, energy-absorbing support, electromagnetic coil and permanent magnet, and the setting of energy-absorbing buoy, converts the kinetic energy of the reciprocating motion of the energy-absorbing support into electrical energy, realizes energy recovery and improves platform stability, and effectively solves the problem that existing floating wind turbine foundation platforms that can absorb wave current energy are easily affected by waves and ocean currents in complex marine environments, resulting in vortex-induced vibration and large-scale movement.

[0007] Furthermore, multiple turbulence-disrupting blades are fixed to the outer circumference of the energy-absorbing buoy. These blades absorb the impact force of seawater and convert it into the rotational force of the energy-absorbing buoy. The turbulence-disrupting blades can absorb the impact force of seawater and convert it into the rotational force of the energy-absorbing buoy, further reducing the impact of waves on the platform, reducing vortex-induced vibration, and providing additional vibration reduction and energy recovery effects for the platform.

[0008] Furthermore, multiple oscillating hydrofoils are rotatably connected to the support ribs of the energy-absorbing support. These hydrofoils are rotatably connected to the support ribs via pivots. Each hydrofoil adopts a low-speed airfoil shape with a rounded tip and a pointed tail, and its rounded end has a through-hole circular cavity, connected to the pivot via a self-aligning ball bearing. The oscillating hydrofoils can passively rotate around the pivot to change their floating angle, generating thrust opposite to the direction of the seawater load. This provides additional lift to the energy-absorbing support, aiding in the electromagnetic induction of the outer casing and outer float, and improving the platform's stability and energy capture efficiency.

[0009] Furthermore, the unidirectional array of oscillating hydrofoils is distributed at the bottom of the supporting rib, with multiple oscillating hydrofoils arranged at equal intervals. This unidirectional array and equidistant arrangement of the oscillating hydrofoils allows them to generate thrust and lift more evenly and effectively when subjected to wave and current loads, further improving the platform's stability and energy recovery. Simultaneously, the optimized layout of the oscillating hydrofoils ensures they can effectively reduce vibration and capture energy under the influence of water flow from different directions.

[0010] Furthermore, at least one vortex-induced vibrator is rotatably connected to the outside of the outer buoy. The vortex-induced vibrator integrates a power generation unit to convert the oscillating mechanical energy of the vortex-induced vibrator into electrical energy, thereby further improving the energy recovery efficiency of the platform and providing additional auxiliary power to the platform. At the same time, the oscillation of the vortex-induced vibrator disrupts the formation of regular vortex streets, disperses water flow energy, reduces the vibration amplitude of the outer buoy, and enhances the stability of the platform.

[0011] Furthermore, the vortex-induced oscillator is designed as a streamlined oscillating body with a teardrop-shaped cross-section, including a water-facing arc surface, a flow-guiding surface, and a flow-guiding tip. The water-facing arc surface guides the water flow to separate smoothly. The vortex-induced oscillator with the above structure can more efficiently convert water flow energy into mechanical energy and further into electrical energy, improving energy conversion efficiency, while reducing the resistance of the water flow to the oscillator, making its oscillation smoother.

[0012] Furthermore, the flow-guiding tip is acute-angled, which further accelerates the separation of water flow to form periodic alternating vortices, more effectively driving the vortex-induced oscillator to swing and enhancing power generation efficiency. At the same time, this design can better disrupt the formation of regular vortex streets, significantly reduce the vibration amplitude of the outer buoy, and further improve the stability of the platform.

[0013] Furthermore, the power generation unit includes a permanent magnet array and an electromagnetic coil. Electromagnetic conversion is achieved through the oscillation of the vortex-induced oscillator and the cooperation of the permanent magnet array and the electromagnetic coil to output electrical energy. This power generation method has a simple structure, high reliability, and can operate stably in complex marine environments. It effectively converts the mechanical energy of the oscillation of the vortex-induced oscillator into electrical energy to provide auxiliary power for the platform. At the same time, it avoids the gear transmission of traditional mechanical transmission power generation structures, reduces corrosion and jamming problems in the marine environment, and improves power generation efficiency and system reliability.

[0014] Furthermore, the ratio of the number of intermediate pontoons to the number of outer pontoons is 1:3. This proportional design enables the platform structure to be more stable, rationally distributes buoyancy and load-bearing capacity, and optimizes the platform's stress performance and motion response, giving it better adaptability and stability in complex marine environments, and helping to improve the operating efficiency and service life of the wind turbine.

[0015] Furthermore, the connecting beam includes a main support, a top transverse support, a diagonal brace, a base, and a bottom transverse support. The main support connects two adjacent outer buoys, the top transverse support connects the outer buoy and the intermediate buoy, the base is fixed to the bottom of the intermediate buoy, the bottom transverse support connects the outer buoy and the base, and the diagonal brace connects the main support and the base. This connecting beam structure forms a stable truss structure, effectively connecting the intermediate and outer buoys, enhancing the overall rigidity and stability of the platform, and improving its resistance to wind and waves. This structural design also helps to rationally distribute loads, optimize the platform's mechanical properties, and ensure the platform's safety and reliability in complex marine environments.

[0016] Compared with the prior art, the present invention discloses at least the following beneficial effects:

[0017] This invention innovatively integrates energy recovery and vibration reduction technologies such as energy-absorbing buoys, oscillating hydrofoils, and vortex-induced oscillators to achieve an integrated solution of "vibration suppression-energy recovery-active adjustment" for floating wind turbine foundation platforms capable of absorbing wave and current energy. It not only significantly improves the platform's stability in complex marine environments and reduces the impact of vortex-induced vibration and large-amplitude movements on wind turbine power generation efficiency, but also efficiently recovers wave and current energy, providing 20%–30% of auxiliary power to the platform. Simultaneously, it extends the platform's structural lifespan, reduces construction and maintenance costs, and provides efficient and reliable technical support for deep-sea wind power development. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of the floating wind turbine foundation platform capable of absorbing wave current energy according to Embodiment 1 of the present invention;

[0020] Figure 2 This is a right view of the floating wind turbine foundation platform capable of absorbing wave current energy according to Embodiment 1 of the present invention;

[0021] Figure 3 This is a top view of the floating wind turbine foundation platform capable of absorbing wave current energy according to Embodiment 1 of the present invention;

[0022] Figure 4 This is an isometric view of the floating wind turbine foundation platform capable of absorbing wave current energy according to Embodiment 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the connecting frame in Embodiment 1 of the present invention;

[0024] Figure 6 This is a schematic diagram of the energy-absorbing support structure in Embodiment 1 of the present invention;

[0025] Figure 7 This is a schematic diagram of the energy-absorbing buoy in Embodiment 1 of the present invention;

[0026] Figure 8 This is a schematic diagram of the vortex-induced oscillator in Embodiment 1 of the present invention;

[0027] Figure 9 This is an isometric view of the floating wind turbine foundation platform capable of absorbing wave current energy according to Embodiment 2 of the present invention;

[0028] Figure 10 This is a schematic diagram of the energy-absorbing support structure in Embodiment 2 of the present invention;

[0029] Figure 11 This is a schematic diagram of the oscillating hydrofoil in Embodiment 2 of the present invention.

[0030] In the diagram: 1. Intermediate buoy; 2. Outer buoy; 3. Energy-absorbing bracket; 31. Intermediate sleeve; 32. Support rib; 33. Outer sleeve; 34. Oscillating hydrofoil; 35. Rotating shaft; 4. Vortex-induced vibrator; 41. Water-facing arc surface; 42. Drainage surface; 43. Drainage tip; 44. End face; 45. Rotary connection hole; 5. Energy-absorbing buoy; 51. Buoy body; 52. Turbine blades; 6. Connecting beam; 61. Main body support; 62. Top transverse support; 63. Diagonal support; 64. Base; 65. Bottom transverse support. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Existing floating wind turbine foundation platforms capable of absorbing wave and current energy are susceptible to vortex-induced vibration and large-scale motion under the influence of waves and currents in complex marine environments, affecting power generation efficiency and potentially causing structural fatigue. Traditional vibration reduction methods struggle to balance vibration reduction effectiveness with energy harvesting. Therefore, this invention provides a floating wind turbine foundation platform capable of absorbing wave and current energy. The aim is to innovatively integrate vibration energy harvesting and passive control technologies to achieve an integrated solution of "vibration suppression - energy recovery - active adjustment" for the floating wind turbine platform, effectively addressing the key issues in the prior art.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] Reference Figures 1 to 8As shown, Embodiment 1 of the present invention provides a floating wind turbine foundation platform capable of absorbing wave current energy. It adopts a three-buoy semi-submersible structure, with the central buoy 1 connected to the wind turbine tower, and three outer buoys 2 arranged in an equilateral triangle, connected to the central node via a connecting beam 6. An energy-absorbing buoy 5 and an energy-absorbing support 3 are fitted onto the body of the central buoy 1. The energy-absorbing buoy 5 is located at the bottom of the energy-absorbing support 3 and is used to drive the energy-absorbing support 3 to reciprocate along the axial direction of the central buoy 1. The energy-absorbing support 3 includes a central sleeve 31 fitted around the outer periphery of the central buoy 1, and outer sleeves 33 fitted around the outer periphery of the three outer buoys 2. The outer sleeves 33 are fixedly connected to the central sleeve 31 via supporting ribs 32. Electromagnetic coils are sealed inside the three outer sleeves 33. Correspondingly, permanent magnets are fixed inside the three outer buoys 2. When the energy-absorbing support 3 reciprocates up and down due to the influence of waves, the three outer sleeves 33 convert the kinetic energy of the reciprocating motion into electrical energy. A self-aligning ball bearing is provided between the energy-absorbing buoy 5 and the intermediate buoy 1, allowing the energy-absorbing buoy 5 to rotate freely. Multiple turbulence-inducing blades 52 are fixed to the outer circumference of the energy-absorbing buoy 5 to absorb the impact of seawater and convert the unidirectional impact force into the rotational force of the energy-absorbing buoy 5, thereby reducing the impact of sea waves on the intermediate buoy 1 and reducing vortex-induced vibration. At the same time, the rise of the energy-absorbing buoy 5 drives the energy-absorbing support 3 to rise, and the power generation is completed through the electromagnetic cooperation between the outer sleeve 33 and the outer buoy 2.

[0036] In one specific embodiment, such as Figure 5 As shown, the intermediate buoy 1 and the outer buoy 2 are connected and fixed by a connecting beam 6. The connecting beam 6 includes a main support 61 connecting two adjacent outer buoys 2, a top transverse support 62 connecting the outer buoy 2 and the intermediate buoy 1, a base 64 fixed to the bottom of the intermediate buoy 1, a bottom transverse support 65 connecting the outer buoy 2 and the base 64, and a diagonal bracing 63 connecting the main support 61 and the base 64. The main support 61 and the top transverse support 62 are on the same horizontal plane and fixed near the top of the outer buoy 2. The base 64 is fixedly connected to the bottom end of the intermediate buoy 1. One end of the bottom transverse support 65 is connected to the base 64, and the other end is connected to the bottom end of the outer buoy 2. One end of the diagonal bracing 63 is fixed to the midpoint of the main support 61, and the other end is fixed to the base 64.

[0037] In one specific embodiment, such as Figure 6As shown, the energy-absorbing support 3 includes an intermediate sleeve 31, a supporting rib 32, and an outer sleeve 33. The intermediate sleeve 31 is fitted around the outer periphery of the intermediate float 1. It is the core component of the energy-absorbing support 3, serving as a connection and support, while allowing the energy-absorbing support 3 to reciprocate along the axial direction of the intermediate float 1. The outer sleeve 33 is fitted around the outer periphery of the three outer floats 2 and is fixedly connected to the intermediate sleeve 31 via the supporting rib 32. An electromagnetic coil is sealed inside the outer sleeve 33 to convert the kinetic energy of the reciprocating motion of the energy-absorbing support 3 into electrical energy. The supporting rib 32 connects the intermediate sleeve 31 and the outer sleeve 33, providing fixation and support to ensure the stability of the entire energy-absorbing support 3 structure.

[0038] When the energy-absorbing buoy 5 moves up and down due to the impact of waves, the energy-absorbing support 3 will move accordingly. The electromagnetic coil inside the outer tube 33 interacts with the permanent magnet inside the outer buoy 2, converting mechanical energy into electrical energy, thus realizing energy recovery. The movement of the energy-absorbing support 3 can also reduce the impact of waves on the intermediate buoy 1, reduce vortex-induced vibration, and thus improve the stability of the platform.

[0039] In one specific embodiment, such as Figure 7 As shown, the energy-absorbing pontoon 5 includes a pontoon body 51 and baffles 52. The pontoon body 51 serves as buoyancy support and structural load-bearing. The pontoon body 51 is typically a hollow cylindrical structure with sufficient buoyancy to support the weight of the entire platform and can float freely in the water. The baffles 52 are fixed to the outer circumference of the pontoon body 51, and multiple baffles 52 are evenly distributed along the circumference of the pontoon body 51. These baffles 52 are used to absorb the impact force of seawater and convert it into the rotational force of the pontoon. The design of the baffles 52 increases the contact area between the pontoon and the seawater, thereby more effectively absorbing wave energy.

[0040] The main body of the pontoon 51 adopts a hollow design, which ensures sufficient buoyancy while reducing structural weight, thereby improving the stability and economy of the platform. A self-aligning ball bearing is installed between the energy-absorbing pontoon 5 and the intermediate pontoon 1. The use of the self-aligning ball bearing allows the energy-absorbing pontoon 5 to rotate freely while maintaining a stable connection with the intermediate pontoon 1. This bearing design allows the pontoon to flexibly adjust its position when subjected to wave impact, reducing direct impact on the intermediate pontoon 1 and thus reducing vortex-induced vibration.

[0041] On one hand, the energy-absorbing buoy 5 absorbs the impact force of seawater through the deflector blades 52 on its outer circumference and converts it into rotational force. This design not only effectively reduces the impact of waves on the intermediate buoy 1 but also converts some wave energy into mechanical energy. On the other hand, the rotation of the energy-absorbing buoy 5 reduces the direct impact of waves on the intermediate buoy 1, thereby reducing vortex-induced vibration. This vibration reduction effect is crucial for improving the stability and service life of the floating wind turbine foundation platform that can absorb wave energy. Simultaneously, when the energy-absorbing buoy 5 moves up and down, it drives the axial movement of the intermediate buoy 1 of the energy-absorbing support 3. The interaction between the electromagnetic coil and permanent magnet between the energy-absorbing support 3 and the outer buoy 2 converts mechanical energy into electrical energy, providing auxiliary power to the platform.

[0042] The energy-absorbing support 3 and the energy-absorbing float 5 are important components of the floating wind turbine foundation platform capable of absorbing wave current energy in this invention. The energy-absorbing support 3, in conjunction with the energy-absorbing float 5, achieves energy recovery and vibration reduction functions. The energy-absorbing float 5 absorbs wave energy through its deflector blades 52 and converts it into rotational force, achieving flexible rotation via a self-aligning ball bearing. This effectively reduces the impact of waves on the intermediate float 1 and lowers vortex-induced vibration. The coordinated movement of the two components, through the interaction of the electromagnetic coil and the permanent magnet, converts mechanical energy into electrical energy, providing auxiliary power to the platform and significantly improving the economy and reliability of the floating wind turbine foundation platform capable of absorbing wave current energy.

[0043] In a further optimized embodiment, each of the outer floats 2 is rotatably connected to two vortex-induced oscillators 4. Correspondingly, the outer float 2 is rotatably connected to the internal integrated power generation unit of the vortex-induced oscillator 4, which works with the vortex-induced oscillator 4 to achieve electromagnetic conversion and output electrical energy.

[0044] In one specific embodiment, such as Figure 8 As shown, the vortex-induced oscillator 4 is designed as a streamlined oscillating body capable of capturing water flow energy and converting it into oscillating mechanical energy. Its cross-section is teardrop-shaped, including an upstream arc surface 41, a drainage surface 42, and a drainage tip 43. The cross-section is an end face 44, with a rotating connection hole 45 extending through both the upper and lower end faces 44. The upstream arc surface 41, located at the front end of the oscillator, is a smooth concave surface that guides the water flow to separate smoothly, reducing resistance and inducing the initial shedding of vortices. The drainage surface 42 is an inclined plane that smoothly connects to the upstream arc surface 41; the drainage tip 43 is an acute angle that accelerates water flow separation, forming periodic alternating vortices (Karman vortex street), generating periodic lateral forces that drive the oscillator to oscillate left and right. The rotating connection hole 45 is located at the center of the oscillator and is used for hinged connection with the outer float 2, allowing the vortex-induced oscillator 4 to oscillate freely around its axis.

[0045] The power generation unit includes a permanent magnet array fixed to the inner wall of the outer float 2 and an electromagnetic coil integrated into the rotating connection hole 45 of the vortex-induced oscillator 4. The permanent magnet array forms a strong static magnetic field, which can be neodymium magnets with a magnetic field strength of 0.8–1.2T. This power generation unit enables non-mechanical power generation. First, water flowing through the guide tip 43 generates vortices that fall off, driving the vortex-induced oscillator 4 to oscillate around the axis 35, generating mechanical energy. As the vortex-induced oscillator 4 oscillates, its internal electromagnetic coil undergoes relative cutting motion with the permanent magnets inside the outer float 2. The coil cuts magnetic field lines, generating a periodic alternating current. This process satisfies Faraday's law of electromagnetic induction, and the energy path is: wave kinetic energy → vortex-induced oscillator 4 oscillation mechanical energy → coil cutting magnetic field lines → induced electrical energy output. For details regarding the above power generation unit, please refer to the existing patent technology with publication number CN104005901B.

[0046] Meanwhile, the oscillation of the vortex-induced oscillator 4 disrupts the formation of regular vortex streets, disperses water flow energy, and reduces the vibration amplitude of the outer float 2. Experiments show that the vibration amplitude of the outer float 2 can be reduced by more than 50%.

[0047] It should be understood that in practical applications, the vortex-induced oscillator 4 can also be mechanically connected to the outer float 2 to generate electricity, such as through gear-driven rotation. However, in the preferred embodiment described above, the vortex-induced oscillator 4 is directly hinged to the outer float 2. Compared to the gear-driven connection of traditional mechanical transmission power generation structures, this eliminates the gear transmission chain, avoids corrosion and jamming problems in the marine environment, improves reliability, and also facilitates the efficient oscillation of the vortex-induced oscillator 4. The oscillation frequency matches the wave eddy frequency (typically 0.5Hz to 2Hz), directly driving the electromagnetic coil and reducing intermediate transmission losses.

[0048] Example 2

[0049] Reference Figures 9 to 11 As shown, Embodiment 2 of the present invention provides another floating wind turbine foundation platform that can absorb wave current energy. Based on the three-float semi-submersible structure of Embodiment 1, this floating wind turbine foundation platform that can absorb wave current energy innovatively integrates the oscillating hydrofoil 34 technology, further improving the stability and energy capture efficiency of the platform.

[0050] Specifically, such as Figure 9 As shown, the platform adopts a three-float semi-submersible structure, including one intermediate float 1 and three outer floats 2, arranged in an equilateral triangle. The intermediate float 1 is connected to the wind turbine tower, and the outer floats 2 are fixedly connected to the intermediate float 1 via connecting beams 6. The connecting beams 6 include a main support 61, a top transverse support 62, a diagonal bracing 63, a base 64, and a bottom transverse support 65, forming a stable truss structure. The energy-absorbing bracket 3 is fitted around the outer periphery of the intermediate float 1, including an intermediate sleeve 31, a support rib 32, and an outer sleeve 33. An electromagnetic coil is sealed inside the outer sleeve 33, which works in conjunction with a permanent magnet inside the outer float 2 to achieve energy conversion.

[0051] like Figure 10 As shown, in this embodiment, an oscillating hydrofoil 34 is added to the support rib 32 of the energy-absorbing bracket 3. The oscillating hydrofoil 34 is rotatably connected to the support rib 32 via a rotating shaft 35. The oscillating hydrofoil 34 adopts a low-speed airfoil with a rounded tip and a pointed tail. Its rounded end has a through circular cavity, which is connected to the rotating shaft 35 via a self-aligning ball bearing to ensure that the hydrofoil can swing freely.

[0052] like Figure 11 As shown, the oscillating hydrofoils 34 are arranged in a unidirectional array at the bottom of the support rib 32. The two ends of the rotating shaft 35 are connected to the support rib 32, and the oscillating hydrofoils 34 are rotatably connected to the rotating shaft 35. Multiple oscillating hydrofoils 34 are arranged equidistantly. When the energy-absorbing support 3 is subjected to wave current load, the oscillating hydrofoils 34 can passively rotate around the rotating shaft 35 to change their floating angle, generating thrust opposite to the direction of the seawater load, providing additional lift for the energy-absorbing support 3, and assisting in the electromagnetic induction between the outer casing 33 and the outer float 2. Simultaneously, the vortex-induced oscillator 4 on the outer float 2 further captures water flow energy through the oscillating power generation unit. The combined effect of these two components can provide 20% to 30% of the auxiliary power for the platform.

[0053] In this embodiment, the damping effect of the oscillating hydrofoil 34 combined with the kinetic energy absorption of the energy-absorbing support 3 significantly reduces platform vibration and improves wind turbine power generation efficiency by more than 15%. Simultaneously, the restoring force provided by the hydrofoil reduces the design requirements for the mooring system, saving construction costs.

[0054] The floating wind turbine foundation platform disclosed in this invention, capable of absorbing wave current energy, can provide 20%–30% auxiliary power to the platform by installing a vortex-induced vibration module. Simultaneously, the application of hydrofoil vibration reduction technology not only improves the wind turbine's power generation efficiency by more than 15% but also reduces the platform's pitch amplitude by 50%, significantly extending the structural lifespan. This results in significant expected effects in multiple aspects, including power generation gain, cost reduction, and stability improvement. Furthermore, this embodiment integrates the oscillating hydrofoil 34 and the energy-absorbing support 3 to achieve an integrated solution of "vibration suppression-energy recovery-active adjustment." The synergistic effect of the oscillating hydrofoil 34 and the energy-absorbing support 3 enhances the vibration reduction effect and energy capture efficiency, and the passive control of the hydrofoil requires no additional energy, reducing system complexity. The platform's overall structure is compact, adaptable to the complex environment of deep-sea areas, and provides reliable technical support for the commercial application of floating wind turbines.

[0055] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0056] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A floating wind turbine foundation platform capable of absorbing wave energy, characterized in that, The utility model provides a kind of energy-absorbing floating body, including intermediate pontoon (1), the peripheral annular array distribution of the intermediate pontoon (1) is with multiple outer pontoons (2), multiple the outer pontoon (2) is fixedly connected with the intermediate pontoon (1) by connecting beam (6);Energy-absorbing bracket (3) is further movably connected on the intermediate pontoon (1) and outer pontoon (2), the energy-absorbing bracket (3) includes the intermediate sleeve (31) of being set on intermediate pontoon (1), the outer sleeve (33) of being set on outer pontoon (2), the support rib plate (32) of being fixedly connected the intermediate sleeve (31) with the outer sleeve (33);The outer sleeve (33) is sealed with electromagnetic coil, the outer pontoon (2) is fixed with permanent magnet, the electromagnetic coil is cooperated with the permanent magnet and is used for converting the reciprocating motion kinetic energy of the energy-absorbing bracket (3) into electric energy;Still including energy-absorbing pontoon (5) of being set on the outer periphery of the intermediate pontoon (1) and being located at the bottom of the energy-absorbing bracket (3), the energy-absorbing pontoon (5) is used to drive the energy-absorbing bracket (3) and reciprocate along the intermediate pontoon (1) axially;The support rib plate (32) of the energy-absorbing bracket (3) is rotatably connected with multiple oscillating hydrofoils (34), the oscillating hydrofoil (34) is rotatably connected with support rib plate (32) by pivot (35), the oscillating hydrofoil (34) adopts the low-speed airfoil of round head sharp tail shape, and its round head end is provided with a through circular cavity, which is connected with the pivot (35) by a self-aligning ball bearing.

2. The wave energy absorbable floating wind turbine foundation platform according to claim 1, wherein, The outer periphery of the energy-absorbing pontoon (5) is fixedly connected with multiple spoiler blades (52), which are used to absorb the impact force of seawater and convert it into the rotating force of the energy-absorbing pontoon (5).

3. The wave energy absorbable floating wind turbine foundation platform according to claim 1, wherein, The oscillating hydrofoils (34) are unidirectionally arranged at the bottom of the support rib plate (32), and multiple oscillating hydrofoils (34) are equidistantly arranged.

4. The wave energy absorbable floating wind turbine foundation platform according to claim 1, wherein, At least one vortex-excited vibrator (4) is rotatably connected to the outer pontoon (2), and an electricity generating unit is integrated in the vortex-excited vibrator (4) to convert the swing mechanical energy of the vortex-excited vibrator (4) into electric energy.

5. The wave energy absorbable floating wind turbine foundation platform according to claim 4, wherein, The vortex-excited vibrator (4) is designed as a streamlined swing body, and its cross section is in the shape of a water droplet, including a water-approaching arc surface (41), a flow guiding surface (42) and a flow guiding tip (43), the water-approaching arc surface (41) guides the smooth separation of water flow.

6. The wave energy absorbable floating wind turbine foundation platform according to claim 5, wherein, The flow guiding tip (43) is at an acute angle, used to accelerate the separation of water flow to form periodic alternating vortices and push the vortex-excited vibrator (4) to swing.

7. The wave energy absorbable floating wind turbine foundation platform according to claim 4, wherein, The electricity generating unit includes a permanent magnet array and an electromagnetic coil, and the vortex-excited vibrator (4) realizes electromagnetic conversion by swinging with the permanent magnet array and the electromagnetic coil to output electric energy.

8. The wave energy absorbable floating wind turbine foundation platform according to claim 1, wherein, The number ratio of the intermediate pontoon (1) to the outer pontoon (2) is 1:

3.

9. The wave energy absorbable floating wind turbine foundation platform according to claim 1, wherein, The connecting beam (6) comprises a main body support (61), a top transverse support (62), a cable-stayed support (63), a base (64) and a bottom transverse support (65), the main body support (61) is connected with two adjacent outer pontoons (2), the top transverse support (62) is connected with the outer pontoon (2) and the middle pontoon (1), the base (64) is fixed at the bottom of the middle pontoon (1), the bottom transverse support (65) is connected with the outer pontoon (2) and the base (64), and the cable-stayed support (63) is connected with the main body support (61) and the base (64).

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