Anti-scouring device for offshore wind power foundation

Abstract

The application discloses a vortex-dissipating and energy-dissipating offshore wind power foundation anti-scour device, which comprises a pile foundation, a rotating assembly and a plurality of vortex-dissipating components, the rotating assembly comprises a sliding component and a plurality of energy-dissipating components, the sliding component is arranged around the pile foundation, the energy-dissipating components are connected with the sliding component and extend outward, the energy-dissipating components are rotatably arranged around the pile foundation along the sliding component, the vortex-dissipating components are fixed with the outer circumferential surface of the pile foundation and protrude outward relative to the pile foundation, the plurality of vortex-dissipating components are arranged at intervals at least in the circumferential direction of the pile foundation, and at least part of the vortex-dissipating components is located above the seabed surface. The vortex-dissipating and energy-dissipating offshore wind power foundation anti-scour device has the energy-dissipating components and the vortex-dissipating components, the energy-dissipating components convert the kinetic energy of water flow into mechanical energy of the energy-dissipating components, the vortex-dissipating components effectively destroy the horseshoe vortex structure, omnidirectionally weaken the intensity of the horseshoe vortex and the detached vortex around the pile foundation, and effectively reduce the scour of the soil around the pile foundation.

Description

TECHNICAL FIELD

[0001] The present application relates to the offshore wind power technology field, and in particular to a vortex and energy dissipation offshore wind power foundation anti-scour device. BACKGROUND

[0002] The offshore wind turbine mainly consists of a foundation, a tower, a cabin and blades. Among them, the stability of the wind turbine foundation is crucial to the safe operation of the offshore wind turbine. About 65% of the support structures in China's offshore wind farms use single pile foundations. Single pile foundation has the advantages of simple structure and convenient construction, and has become the most important foundation structure type in the field of offshore wind power. Due to the existence of the pile body, a horseshoe vortex is easily generated upstream of the pile foundation, and a shedding vortex is generated downstream of the pile foundation. These flow vortex structures interact with the soil around the pile, causing the surface soil of the seabed to be entrained and transported by the water flow, resulting in the soil around the pile being scoured, and further causing a scour pit around the pile. The scour around the pile has an adverse effect on the stability of the single pile foundation. In order to ensure the safe operation of the offshore wind turbine, the offshore wind power foundation anti-scour protection is of great significance.

[0003] The common anti-scour measures in the related art can be mainly divided into active protection and passive protection. The principle of active protection measures is to reduce the intensity of the incoming flow and reduce the intensity of the vortex structure of local scour of the pile foundation. Common active protection schemes include guard ring protection, sacrificial pile protection, downstream stone plate protection, etc. The principle of passive protection scheme is to lay a reinforcement layer around the pile foundation, thereby improving the anti-scour performance of the soil around the pile. However, the above offshore wind power foundation anti-scour protection has the problems of few functions and poor anti-scour effect. SUMMARY

[0004] The present application aims to at least partly solve one of the problems in the related art. To this end, the embodiments of the present application propose a vortex and energy dissipation offshore wind power foundation anti-scour device.

[0005] The vortex and energy dissipation offshore wind power foundation anti-scour device according to the embodiments of the present application comprises: a pile foundation, the bottom of the pile foundation is embedded in the seabed; a rotating assembly, the rotating assembly is arranged on the part of the pile foundation between the sea level and the seabed surface, the rotating assembly comprises a sliding part and a plurality of energy dissipation parts, the sliding part is arranged around the pile foundation, the energy dissipation parts are connected with the sliding part and extend outward, a plurality of the energy dissipation parts are arranged at intervals in the circumferential direction of the pile foundation, and the energy dissipation parts are rotatably arranged around the pile foundation along the sliding part; a plurality of vortex elimination parts, the vortex elimination parts are fixed with the outer circumferential surface of the pile foundation and protrude outward relative to the pile foundation, a plurality of the vortex elimination parts are arranged at intervals at least in the circumferential direction of the pile foundation, and at least part of the vortex elimination parts is located above the seabed surface.

[0006] The offshore wind power foundation anti-scour device provided by the embodiment of the present application has an energy dissipation component and a vortex dissipation component, the energy dissipation component can convert the kinetic energy of water flow into mechanical energy of the energy dissipation component, and the vortex dissipation component can effectively destroy the horseshoe vortex structure, so that the offshore wind power foundation anti-scour device provided by the present application can weaken the intensity of the horseshoe vortex and the shedding vortex around the pile foundation in all directions, effectively reduce the scour of the soil around the pile foundation, and has the advantages of simple structure, easy installation, no need to open holes on the pile foundation, and the integrity of the pile foundation can be maintained.

[0007] In some embodiments, the sliding component is a sliding bearing, an inner ring of the sliding bearing is fixed with the pile foundation, the energy dissipation component is connected with the outer circumferential surface of an outer ring of the sliding bearing and extends outward, and the energy dissipation component drives the outer ring to rotate around the pile foundation under the impact of sea current; or, the sliding component is a sliding rail, the sliding rail defines an annular track around the pile foundation, and the energy dissipation component is slidably connected with the sliding rail and slides along the annular track under the impact of sea current.

[0008] In some embodiments, the offshore wind power foundation anti-scour device comprises a plurality of connecting rods, the plurality of connecting rods correspond to the plurality of energy dissipation components one by one, the connecting rod has a first end and a second end, the first end of the connecting rod is connected with the outer circumferential surface of the sliding component, the second end of the connecting rod is connected with the energy dissipation component, and the connecting rod extends along the radial direction of the pile foundation.

[0009] In some embodiments, a part of the energy dissipation component is recessed to form a groove, and the opening of the groove is directed tangentially to the circumferential direction of the pile foundation.

[0010] In some embodiments, the opening directions of the grooves of the plurality of energy dissipation components are all counterclockwise or clockwise; or, the opening directions of the grooves of a part of the energy dissipation components are counterclockwise, and the opening directions of the grooves of another part of the energy dissipation components are clockwise.

[0011] In some embodiments, the rotating assembly comprises a first rotating assembly and a second rotating assembly which are arranged at intervals in the axial direction of the pile foundation, the opening directions of the grooves of the energy dissipation components in the first rotating assembly are all counterclockwise, and the opening directions of the grooves of the energy dissipation components in the second rotating assembly are all clockwise.

[0012] In some embodiments, the energy dissipation component is a bowl-shaped structure.

[0013] In some embodiments, the outer end of the vortex dissipation component forms a pointed end structure; and / or, the vortex dissipation components arranged at intervals in the circumferential direction of the pile foundation are at least four.

[0014] In some embodiments, the vortex elimination component is arranged at a position with a relative height less than or equal to 1 meter, based on the seabed surface.

[0015] In some embodiments, the scour protection device for offshore wind power foundation further comprises a fixing ring, the fixing ring is sleeved on the pile foundation and connected with the pile foundation, the vortex elimination component is connected with the outer circumferential surface of the fixing ring, and the bottom of the fixing ring abuts against the seabed surface. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a scour protection device for offshore wind power foundation provided by an embodiment of the present application.

[0017] Figure 2 FIG. 2 is a front view of the scour protection device for offshore wind power foundation provided by the embodiment of the present application.

[0018] Figure 3 FIG. 3 is a top view of the scour protection device for offshore wind power foundation provided by the embodiment of the present application.

[0019] Figure 4 FIG. 4 is a structural schematic diagram of a rotating assembly provided by the embodiment of the present application.

[0020] Figure 5 FIG. 5 is a structural schematic diagram of a fixing ring and a vortex elimination component provided by the embodiment of the present application.

[0021] LIST OF REFERENCE NUMERALS

[0022] Pile foundation 1, rotating assembly 2, sliding bearing 21, inner ring 211, outer ring 212, energy dissipation component 22, recess 221, connecting rod 23, vortex elimination component 3, fixing ring 4, seabed surface 5. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] The embodiments of the present application are described below according to Figures 1-5 The scour protection device for offshore wind power foundation provided by the embodiment of the present application is described below. The scour protection device for offshore wind power foundation comprises a pile foundation 1, a rotating assembly 2 and a plurality of vortex elimination components 3.

[0025] The bottom of the pile foundation 1 is embedded in the seabed, i.e. the bottom of the pile foundation 1 is below the seabed surface 5, a part of the pile foundation 1 above the seabed surface 5 is immersed in seawater, and another part protrudes above the sea level. The rotating assembly 2 is arranged on the part of the pile foundation 1 between the sea level and the seabed surface 5, and the rotating assembly 2 comprises a sliding component and a plurality of energy dissipation components 22. The sliding component is arranged around the pile foundation 1, the energy dissipation components 22 are connected to the sliding component and protrude outward, the plurality of energy dissipation components 22 are arranged at intervals in the circumferential direction of the pile foundation 1, and the energy dissipation components 22 are rotatably arranged around the pile foundation 1 along the sliding component. The vortex elimination components 3 are fixed to the outer circumferential surface of the pile foundation 1 and protrude outward relative to the pile foundation 1, the plurality of vortex elimination components 3 are arranged at least at intervals in the circumferential direction of the pile foundation 1, the vortex elimination components 3 are arranged close to the seabed surface 5, and at least a part of the vortex elimination components 3 is above the seabed surface 5.

[0026] The plurality of vortex elimination components 3 arranged at least at intervals in the circumferential direction of the pile foundation 1 specifically includes that the plurality of vortex elimination components 3 are arranged at intervals in the circumferential direction of the pile foundation 1, or a part of the plurality of vortex elimination components 3 are arranged at intervals in the circumferential direction of the pile foundation 1 and a part of the plurality of vortex elimination components 3 are arranged at intervals in the axial direction of the pile foundation 1.

[0027] The at least a part of the vortex elimination components 3 above the seabed surface 5 specifically includes that the vortex elimination components 3 are above the seabed surface 5, or a part of the vortex elimination components 3 are above the seabed surface 5 and another part of the vortex elimination components 3 are below the seabed surface 5.

[0028] The seawater flows from different directions to the pile foundation 1, and the energy dissipation components 22 are subjected to a certain impact force from the seawater flow. Under the action of the impact force of the seawater flow, the energy dissipation components 22 generate a torque, and the torque makes the energy dissipation components 22 rotate around the pile foundation 1 along the sliding component. The flow energy of the seawater is converted into mechanical energy of the movement of the energy dissipation components 22, so that the intensity of the seawater flow is greatly reduced, thereby effectively inhibiting the formation of shedding vortices downstream of the pile foundation 1 or greatly weakening the intensity of the formed shedding vortices.

[0029] Further, the seawater flows from different directions to the pile foundation 1, and horseshoe vortices are prone to be generated upstream of the pile foundation 1. The vortex elimination components 3 protruding relative to the outer circumferential surface of the pile foundation 1 can play a role in destroying the horseshoe vortices by disturbing the flow, weakening the intensity of the horseshoe vortices, and achieving the purpose of active scour prevention, effectively protecting the soil near the pile foundation 1 and avoiding the formation of scour pits. When the seawater flow contacts the vortex elimination components 3, the vortex elimination components 3 can “scatter” the seawater flow, locally change the flow velocity and flow direction of the seawater flow, and make the energy of the seawater flow dissipate to a certain extent, so that a large horseshoe vortex is not formed upstream of the pile foundation 1. Moreover, since the horseshoe vortices are generally formed near the seabed surface 5, the vortex elimination components 3 are arranged close to the seabed surface 5, and the effect of eliminating the horseshoe vortices is more obvious.

[0030] The scouring prevention device for offshore wind power foundation provided by the embodiment of the present application has an energy dissipation component and a vortex dissipation component, the energy dissipation component can convert the kinetic energy of water flow into mechanical energy of the energy dissipation component, and the vortex dissipation component can effectively destroy the horseshoe vortex structure, so that the scouring prevention device for offshore wind power foundation provided by the present application can weaken the intensity of the horseshoe vortex and the shedding vortex around the pile foundation in all directions, effectively reduce the scouring of the soil around the pile foundation, and has simple structure and easy installation, without the need of opening holes on the pile foundation, and the integrity of the pile foundation can be maintained.

[0031] In some embodiments, as shown in Figure 1 and Figure 4 , the sliding component of the rotating assembly 2 is a sliding bearing 21, the sliding bearing 21 has an inner ring 211 and an outer ring 212, the inner ring 211 and the outer ring 212 of the sliding bearing 21 can rotate relative to each other, the inner ring 211 is fixed with the outer circumferential surface of the pile foundation 1, and the energy dissipation component 22 is connected with the outer circumferential surface of the outer ring 212 and extends outward. Here, "outer" refers to the direction away from the central axis of the pile foundation 1, and "inner" refers to the direction close to the central axis of the pile foundation 1. The energy dissipation component 22 generates a torque under the impact of seawater flow, and drives the outer ring 212 to rotate around the pile foundation 1 and the inner ring 211, thereby converting the kinetic energy of water flow into mechanical energy.

[0032] Further, as shown in Figure 1 and Figure 4 , the rotating assembly 2 further includes a plurality of connecting rods 23, the plurality of connecting rods 23 correspond one-to-one to the plurality of energy dissipation components 22, the connecting rod 23 has a first end and a second end, and the connecting rod 23 extends along the radial direction of the pile foundation 1. The first end of the connecting rod 23 is fixedly connected with the outer circumferential surface of the outer ring 212 of the sliding bearing 21, and the second end of the connecting rod 23 is connected with the energy dissipation component 22, that is, the connecting rod 23 connects the energy dissipation component 22 with the outer ring 212. The length of the connecting rod 23 is related to the size of the torque generated by the energy dissipation component 22. The longer the length of the connecting rod 23, the greater the torque, but in actual engineering, the structural strength also needs to be considered, so preferably the length of the connecting rod 23 is at most 1D long, and D is the diameter of the pile foundation 1.

[0033] In some alternative embodiments, the sliding component of the rotating assembly 2 is a sliding rail, the sliding rail defines an annular track around the pile foundation 1, and the energy dissipation component 22 is slidably connected with the sliding rail and slides along the annular track under the impact of seawater flow.

[0034] In order to improve the rotating effect of the rotating assembly 2 under the impact of seawater flow, the energy dissipation component 22 has a certain surface area on the side facing the flow direction of the seawater flow, and after the seawater flow touches the energy dissipation component 22, the energy dissipation component 22 can be better driven to rotate, and the kinetic energy of the seawater flow can be smoothly converted into mechanical energy.

[0035] In some embodiments, a portion of the energy dissipation component 22 is recessed to form a groove 221, and the opening of the groove 221 is oriented in the flow direction of the water flow. Generally, the flow direction of the water flow in the sea is approximately horizontal, so the opening of the groove 221 is oriented in the horizontal direction. Further, in order to make the energy dissipation component 22 better rotate under the action of the water flow, the opening of the groove 221 is tangential to the circumference of the pile foundation 1. The water flow impacts the groove 221 and applies a thrust to the energy dissipation component 22, which is perpendicular to the radial direction of the pile foundation 1, so that the energy dissipation component 22 is more likely to rotate around the pile foundation 1.

[0036] As an example, as shown in Figures 1-5 , the energy dissipation component 22 is in the shape of a bowl, and the outer shape of the energy dissipation component 22 is semispherical. Of course, in other embodiments, the shape of the energy dissipation component 22 can be other, and the present application does not limit this.

[0037] In the embodiment shown in Figures 1-5 , the rotating assembly 2 includes six energy dissipation components 22, which are arranged at equal intervals in the circumferential direction of the sliding bearing 21. In other embodiments, the rotating assembly 2 can include other numbers of energy dissipation components 22, and preferably the number of energy dissipation components 22 is greater than or equal to three.

[0038] Further, in the embodiment shown in Figures 1-5 , the openings of the grooves 221 of all the energy dissipation components 22 are oriented in the counterclockwise direction, so that the energy dissipation components 22 are more likely to rotate clockwise under the action of the water flow. It should be noted that the counterclockwise and clockwise directions here are the directions in the overhead perspective.

[0039] In other alternative embodiments, the openings of the grooves 221 of all the energy dissipation components 22 can be oriented in the clockwise direction, so that the energy dissipation components 22 are more likely to rotate counterclockwise under the action of the water flow.

[0040] In other embodiments, the groove openings of a portion of the energy dissipation components 22 are oriented in the counterclockwise direction, and the groove openings of another portion of the energy dissipation components 22 are oriented in the clockwise direction. Specifically, the energy dissipation components are divided into first energy dissipation components and second energy dissipation components, wherein the groove openings of the first energy dissipation components are oriented in the counterclockwise direction, and the groove openings of the second energy dissipation components are oriented in the clockwise direction, and the first energy dissipation components and the second energy dissipation components are arranged alternately and at equal intervals in the circumferential direction of the pile foundation 1. In this way, the energy dissipation components 22 can rotate both clockwise and counterclockwise under the action of the water flow. Preferably, the technical solution in which the groove openings of all the energy dissipation components 22 are oriented in the same direction can better avoid the phenomenon that the thrusts on the energy dissipation components 22 at different positions cancel each other out.

[0041] In some embodiments, there can be multiple rotating assemblies 2, and the multiple rotating assemblies 2 are arranged at intervals in the axial direction of the pile foundation 1.

[0042] In some alternative embodiments, the rotating assembly 2 comprises a first rotating assembly and a second rotating assembly which are spaced apart in the axial direction of the pile foundation 1, wherein the groove openings of the energy dissipation components 22 in the first rotating assembly all face in the counterclockwise direction, so that the energy dissipation components 22 in the first rotating assembly are more likely to rotate clockwise under the action of the water flow. The groove openings of the energy dissipation components 22 in the second rotating assembly all face in the clockwise direction, so that the energy dissipation components 22 in the second rotating assembly are more likely to rotate counterclockwise under the action of the water flow.

[0043] In order to eliminate the horseshoe vortex in all directions, preferably at least one vortex elimination component 3 is arranged in each direction in which the tidal current impacts the pile foundation 1. Preferably, the vortex elimination components 3 are spaced apart in the circumferential direction of the pile foundation 1 and are at least four in number.

[0044] In addition, the shape of the vortex elimination component 3 also has a certain influence on weakening the strength of the horseshoe vortex. Preferably, as shown in Figure 5 , the outer end of the vortex elimination component 3 is formed as a pointed structure, and the pointed portion of the vortex elimination component 3 can better destroy the horseshoe vortex, thereby weakening the strength of the horseshoe vortex and reducing the scouring of the soil around the pile foundation 1.

[0045] In some embodiments, as shown in Figure 1 and Figure 5 , the scour prevention device for offshore wind power foundations further comprises a fixing ring 4 which is sleeved on the pile foundation 1 and connected thereto, and the vortex elimination component 3 is connected to the outer circumferential surface of the fixing ring 4. The fixing ring 4 serves to fix the vortex elimination component 3. Since the fixing ring 4 has a certain thickness in the radial direction of the pile foundation 1, the bottom of the fixing ring 4 also abuts against the seabed surface 5, so that the bottom of the fixing ring 4 is in contact with the sediment surface of the seabed surface 5, thereby serving to isolate the sediment around the pile foundation 1 from the water flow and better avoid the scouring of the sediment around the pile foundation 1.

[0046] As an example, as shown in Figure 2 , the top end of the vortex elimination component 3 is flush with the top end of the fixing ring 4, and the bottom end of the vortex elimination component 3 is flush with the bottom end of the fixing ring 4. The bottom end of the vortex elimination component 3 abuts against the seabed surface 5.

[0047] Since the horseshoe vortex is generally formed within about 1 meter from the seabed surface 5. Therefore, preferably, with the seabed surface 5 as the reference, the vortex elimination component 3 is arranged at a position with a relative height of less than or equal to 1 meter.

[0048] In other alternative embodiments, the vortex elimination component 3 can be arranged at a position at a certain height from the seabed surface 5, i.e. above the seabed surface 5. However, it is preferred that the height of the top end of the vortex elimination component 3 from the seabed surface 5 be greater than or equal to 1 meter, so as to better serve to eliminate the horseshoe vortex.

[0049] Alternatively, in other alternative embodiments, a portion of the vortex elimination component 3 is embedded in the seabed, i.e. a portion of the vortex elimination component 3 is above the seabed surface 5 and another portion of the vortex elimination component 3 is below the seabed surface 5, so that after the soil around the pile foundation 1 is eroded to a certain extent and the seabed surface 5 is lowered, the portion of the vortex elimination component 3 embedded in the seabed gradually leaks out, continuing to weaken the horseshoe vortex. Such an arrangement avoids the phenomenon that the relative height of the vortex elimination component 3 gradually increases with the slow lowering of the seabed surface 5, resulting in the inability to effectively weaken the horseshoe vortex.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0051] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0052] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected or can communicate with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0054] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein merely as identifiers for different elements, regions, layers, or sections, and are not intended to denote a spatial or chronological priority or order except if explicitly so defined. Also, the terms "comprises", "comprising", "includes", "including", or the like are used herein to generally mean comprising, including, or consisting of, unless otherwise indicated.

[0055] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present application, and that changes, modifications, substitutions and variations can be made therein by those skilled in the art without departing from the scope of the present application.

Claims

1. An anti-scouring device for a vortex-reducing energy-dissipating offshore wind power foundation, characterized in that, The application relates to a pile foundation, a rotating assembly arranged on a part of the pile foundation between sea level and a sea bed surface, and a vortex eliminating component. The rotating assembly comprises a sliding component arranged around the pile foundation and a plurality of energy eliminating components connected to the sliding component and extending outward, the energy eliminating components being arranged at intervals in the circumferential direction of the pile foundation and being rotatably arranged around the pile foundation along the sliding component. The vortex eliminating component is fixed to the outer circumferential surface of the part of the pile foundation close to the sea bed surface and protrudes outward relative to the pile foundation, and at least a part of the vortex eliminating component is located above the sea bed surface. A part of the energy eliminating component is recessed to form a groove, and the opening of the groove is tangent to the circumferential direction of the pile foundation. The outer end of the vortex eliminating component forms a pointed end structure. The vortex eliminating components arranged at intervals in the circumferential direction of the pile foundation are at least four in number. The sliding component is a sliding bearing, the inner ring of the sliding bearing is fixed to the pile foundation, the energy eliminating components are connected to the outer circumferential surface of the outer ring of the sliding bearing and extend outward, and the energy eliminating components drive the outer ring to rotate around the pile foundation under the impact of sea current.

2. The vortex suppression and energy dissipating offshore windmill foundation anti-scour device according to claim 1, characterized in that, Alternatively, the sliding component is a sliding rail, the sliding rail defines an annular track around the pile foundation, and the energy eliminating components are slidably connected to the sliding rail and slide along the annular track under the impact of sea current. The plurality of energy eliminating components correspond to the plurality of connecting rods one by one, the connecting rod has a first end and a second end, the first end of the connecting rod is connected to the outer circumferential surface of the sliding component, the second end of the connecting rod is connected to the energy eliminating component, and the connecting rod extends in the radial direction of the pile foundation.

3. The vortex-reducing energy-dissipating offshore wind farm foundation scour protection apparatus according to claim 1 or 2, characterized in that, The opening directions of the grooves of the plurality of energy eliminating components are all counterclockwise or clockwise.

4. The vortex suppression and energy dissipating offshore windmill foundation anti-scouring device according to claim 1, characterized in that, Alternatively, the opening directions of the grooves of a part of the energy eliminating components are counterclockwise, and the opening directions of the grooves of the other part of the energy eliminating components are clockwise. The rotating assembly comprises a first rotating assembly and a second rotating assembly arranged at intervals in the axial direction of the pile foundation, the opening directions of the grooves of the energy eliminating components in the first rotating assembly are all counterclockwise, and the opening directions of the grooves of the energy eliminating components in the second rotating assembly are all clockwise.

5. The vortex suppressing and energy dissipating offshore windmill foundation anti-scouring device according to claim 1, characterized in that, The energy eliminating component is a bowl-shaped structure.

6. The vortex suppression and energy dissipating offshore windmill foundation anti-scouring device according to any one of claims 1, 4, 5, characterized in that, The vortex eliminating component is arranged at a position with a relative height of less than or equal to 1 m relative to the sea bed surface.

7. The vortex suppressing and energy dissipating offshore windmill foundation anti-scouring device according to claim 1, characterized in that, The application further comprises a fixing ring sleeved on the pile foundation and connected to the pile foundation, the vortex eliminating component is connected to the outer circumferential surface of the fixing ring, and the bottom of the fixing ring abuts against the sea bed surface.

8. The vortex suppressing and energy dissipating offshore windmill foundation anti-scouring device according to claim 1, characterized in that, ​

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