A floating single column wind turbine platform mooring system

Abstract

The present application relates to a kind of floating single-column wind power platform mooring system, including single-column wind power platform, multiple groups of cable groups are installed on the side wall surface along the circumference, and a single group of cable groups includes two cables with included angle distribution, one end of the two cables is installed on the wall surface of single-column wind power platform in the form of up-down distribution, and the other end of the two cables is installed on the end of anchor chain or four-eye plate;Anchor chain bottom end is fixed on seabed surface via anchoring base, and water drum is sleeved at the junction of anchor chain and cable, and water drum is located at waterline;So as to provide horizontal direction anchoring positioning performance of wind power platform via anchoring base and anchor chain, longitudinal-pitch restoring moment is generated by up-down vertical distribution cable group to suppress the adverse effects of wind inclination moment, greatly improve the hydrodynamic performance of wind power platform, help to ensure power generation efficiency.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to a floating monopole wind power platform mooring system. Background Technology

[0002] Floating wind turbines differ from traditional floating structures in that they incorporate a wind power generation system on the floating body, thus subjecting them to significant wind-induced tilting moments. Furthermore, the nacelle of the wind turbine is substantial in both mass and height. These factors result in significant pitching motion in floating wind turbines, posing considerable challenges to their structural safety and power generation efficiency.

[0003] In existing technologies, the pitch restoring moment of floating structures is generally provided by the restoring stiffness of the platform, which is directly related to the square of the area moment of the platform's waterline surface. However, the area moment of a single-column wind power platform is very small, so its center of gravity needs to be designed below the center of buoyancy to provide the pitch restoring moment. Even so, the pitch restoring moment is still insufficient.

[0004] Furthermore, existing mooring systems generally only restrict the horizontal movement of the platform, while having minimal restrictions on the pitch movement. Summary of the Invention

[0005] To address the shortcomings of existing production technologies, the applicant provides a structurally sound floating single-column wind power platform mooring system. This system enables reliable mooring while simultaneously generating a pitch-restoring moment to suppress the adverse effects of wind tilting moments, significantly improving the hydrodynamic response performance of the wind power platform and contributing to ensuring power generation efficiency.

[0006] The technical solution adopted in this invention is as follows:

[0007] A floating monopole wind turbine platform mooring system includes a monopole wind turbine platform. Multiple sets of cable groups are installed circumferentially at intervals on the sidewall of the monopole wind turbine platform. Each set of cable groups includes two cables arranged at an angle, one end of which is installed vertically on the wall of the monopole wind turbine platform. The other ends of the two cables are jointly installed on the end of an anchor chain or a four-eye plate. The bottom end of the anchor chain is fixed to the seabed via an anchoring foundation. A water drum is fitted at the junction of the anchor chain and the cables, and the water drum is located at the waterline.

[0008] The single-column wind power platform is an independent unit, and multiple sets of cable groups on the side wall of the single-column wind power platform are respectively connected to the anchor foundation on the seabed surface via corresponding anchor chains.

[0009] Alternatively, the single-column wind power platform may include multiple platforms, with adjacent single-column wind power platforms interconnected as a whole via cable assemblies and four-eye plates. The cable assemblies located on the outer side of the outer single-column wind power platform are connected to the anchoring foundation on the seabed via corresponding anchor chains.

[0010] As a further improvement of the above technical solution:

[0011] The two cables in the single cable group are of the same length and are arranged symmetrically above and below the waterline.

[0012] The water drum is provided with a through hole for the anchor chain to pass upward freely, and the top end of the anchor chain is connected with the cable group through an omega-shaped shackle, the size of the omega-shaped shackle is larger than the diameter size of the through hole, and the omega-shaped shackle is located outside the top surface of the water drum.

[0013] The two ends of the two cables in the cable group are jointly provided with a metal buckle, and the metal buckle is buckled with the arc part at the upper part of the omega-shaped shackle; the two arms at the lower part of the omega-shaped shackle are jointly locked and connected with the anchor chain through a bolt, the two arms at the lower part of the omega-shaped shackle are arranged towards the top surface of the water drum, and the outer size of the two arms at the lower part of the omega-shaped shackle is larger than the diameter size of the through hole.

[0014] The water drum is a hollow steel buoyancy tank, and the outer wall surface of the water drum is uniformly provided with rubber strips.

[0015] Three or four cable groups are uniformly installed on the side wall surface of the single-column wind power platform along the circumference.

[0016] The top end of the single cable is fixedly connected with the lock buckle on the side wall surface of the single-column wind power platform through a shackle.

[0017] The four-eye plate is a circular ring structure, four holes are formed on the four-eye plate along the circumference for connecting two cable groups on the adjacent single-column wind power platform, and the ends of the single cables are respectively installed on the corresponding holes of the four-eye plate through shackles.

[0018] The four-eye plate is symmetrically welded with a hemispherical floating ball on both sides.

[0019] The anchor foundation is a large-grab anchor, and the large-grab anchor is embedded in the soil of the seabed surface.

[0020] The beneficial effects of the present application are as follows:

[0021] The present application has the advantages of compact and reasonable structure, convenient operation, and provides horizontal anchoring positioning performance for the wind power platform through the anchor foundation and the anchor chain, not only realizes reliable mooring of the single-column wind power platform, but also generates a pitch restoring moment through the vertically distributed cable groups, thereby effectively suppressing the adverse pitch motion caused by the wind inclination moment, greatly improving the hydrodynamic performance of the wind power platform, and helping to improve the structural safety and power generation efficiency.

[0022] The present application also has the following advantages:

[0023] The mooring system of the application can be expanded in scale to form a wind power platform group, relies on the mutual movement traction between single-column wind power platforms to reduce the pitching of the wind power platform group, and does not need frequent control operation of the wind power platform group or the mooring system, can be self-adaptive to the living environment, has low cost and good economy.

[0024] When the single-column wind power platform pitches under the action of wind inclination torque, the upper cable on the windward side pulls the single-column wind power platform, and the lower cable on the leeward side also bears a large tension when the platform rotates, thereby forming a restoring torque together to suppress the pitching movement of the platform. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a mooring schematic diagram of a single single-column wind power platform of the application.

[0026] Figure 2 It is Figure 1 a partial enlarged view of A in FIG.

[0027] Figure 3 It is Figure 1 a top view (a case of mooring by three cable groups).

[0028] Figure 4 It is Figure 1 a top view (a case of mooring by four cable groups).

[0029] Figure 5 It is a mooring schematic diagram of multiple single-column wind power platforms of the application.

[0030] Figure 6 It is Figure 5 a partial enlarged view of B in FIG.

[0031] Figure 7 It is a structural schematic diagram of the application in which a floating ball is arranged on both sides of a four-eye plate.

[0032] Figure 8 It is a schematic diagram of the arrangement of a cable group and a four-eye plate of the application.

[0033] Figure 9 It is a schematic diagram of the modular mooring of a single-column wind power platform of the application provided with three cable groups.

[0034] Figure 10 It is Figure 9 a mooring schematic diagram after the expansion of the scale of the modular mooring.

[0035] Figure 11 It is a schematic diagram of the modular mooring of a single-column wind power platform of the application provided with four cable groups.

[0036] Figure 12 It is Figure 11A schematic diagram of the expanded modular mooring system.

[0037] Figure 13 for Figure 11 A schematic diagram of another type of mooring after the modular mooring system has been expanded.

[0038] The components include: 1. Single-column wind power platform; 2. Shackle 1; 3. Cable assembly; 4. Water drum; 5. Anchor chain; 6. Anchoring foundation; 7. Ω-shaped shackle; 8. Four-eye plate; 9. Buoy; 10. Waterline; 20. Seabed surface;

[0039] 41. Through hole;

[0040] 80. Shackle 2. Detailed Implementation

[0041] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0042] like Figure 1 and Figure 5 As shown, a floating monopole wind power platform mooring system of this embodiment includes a monopole wind power platform 1. Multiple sets of cable groups 3 are installed circumferentially on the side wall of the monopole wind power platform 1. Each set of cable groups 3 includes two cables arranged at an angle from top to bottom. One end of the two cables is installed on the wall of the monopole wind power platform 1 in an up-down arrangement. The other end of the two cables is installed together on the end of the anchor chain 5 or on the four-eye plate 8. The bottom end of the anchor chain 5 is fixed to the seabed surface 20 via the anchoring foundation 6. A water drum 4 is fitted at the junction of the anchor chain 5 and the cable. The water drum 4 is located at the waterline 10.

[0043] In this embodiment, the anchoring foundation 6 and anchor chain 5 provide horizontal anchoring and positioning performance for the wind power platform, which not only achieves reliable mooring of the single-column wind power platform, but also generates a pitch recovery torque through the vertically distributed cable group 3, thereby effectively suppressing the adverse pitch motion caused by wind tilting moment.

[0044] When the single-column wind turbine platform 1 pitches under the action of wind tilting moment, the upper cable on the windward side will pull the single-column wind turbine platform 1, while the lower cable on the leeward side will also bear a large tension when the platform rotates, thus forming a restoring moment together to suppress the pitching motion of the platform.

[0045] like Figure 1 As shown, the single-column wind power platform 1 is an independent entity. Multiple sets of cable groups 3 on the side wall of the single-column wind power platform 1 are connected to the anchoring foundation 6 on the seabed surface 20 via corresponding anchor chains 5, thus forming a relatively independent mooring system from a single single-column wind power platform 1.

[0046] exist Figure 5In the embodiment shown, there are multiple single-column wind power platforms 1. Adjacent single-column wind power platforms 1 are interconnected by the installation of cable groups 3 and four-eye plates 8. The cable groups 3 located on the outer side of the single-column wind power platform 1 are connected to the anchoring foundation 6 on the seabed surface 20 via corresponding anchor chains 5, forming a mooring system formed by the interconnection of multiple single-column wind power platforms 1.

[0047] In this embodiment, the mooring system can be scaled up based on each individual wind turbine platform 1 to form a wind turbine platform group. Adjacent individual wind turbine platforms 1 are structurally connected by four-eye plates 8 and cable groups 3. This allows the wind turbine platform group to reduce pitching by relying on the mutual traction between the individual wind turbine platforms 1. Furthermore, it does not require frequent control operations on the wind turbine platform group or the mooring system, and can adapt to the living environment. It is low-cost and economical.

[0048] In this embodiment, the four-eye plate 8 enables the connection between two adjacent single-column wind power platforms 1, effectively facilitating large-scale expansion and greatly reducing the number of mooring anchor chains 5 and anchoring foundations 6 connecting the seabed.

[0049] The two cables in the single cable group 3 are of the same length and are located above and below the waterline 10, respectively. The two cables are arranged symmetrically, which helps to form a stable and reliable mooring system.

[0050] like Figure 2 As shown, the water drum 4 has a through hole 41 for the anchor chain 5 to pass freely upward. The top of the anchor chain 5 is connected to the cable group 3 via an Ω-shaped shackle 7. The size of the Ω-shaped shackle 7 is larger than the diameter of the through hole 41. The Ω-shaped shackle 7 is located outside the top surface of the water drum 4.

[0051] In this embodiment, by connecting the anchor chain 5 through the water drum 4 and then connecting it to the cable group 3, the water drum 4 is not required to bear the tearing force of the cable group 3, thus effectively ensuring the reliability and service life of the water drum 4.

[0052] In this embodiment, the size of the Ω-shaped shackle 7 is larger than the size of the through hole 41 on the water drum 4 through which the anchor chain 5 passes, effectively preventing the anchor chain 5 from slipping off the water drum 4.

[0053] In this embodiment, a positioning method is adopted by using a water drum with 4 strings of anchor chains 5 and then connecting it to the platform. The mooring performance is stable and reliable, and the mooring system can be deployed in deep water areas, which is a true deep-sea wind field.

[0054] The ends of the two cables in the cable group 3 are equipped with metal buckles, which are fastened to the upper arc-shaped part of the Ω-shaped shackle 7. The two lower arms of the Ω-shaped shackle 7 are locked to the anchor chain 5 via pins. The two lower arms of the Ω-shaped shackle 7 are arranged facing the top surface of the water drum 4, and the anchor chain 5 provides reliable vertical restoring force for the Ω-shaped shackle 7. The outer dimensions of the two lower arms of the Ω-shaped shackle 7 are larger than the diameter of the through hole 41.

[0055] The water drum 4 is a hollow steel buoyancy tank. Rubber strips are evenly distributed on the outer wall of the water drum 4 to improve its anti-collision performance.

[0056] Three or four sets of cable groups 3 are evenly installed along the circumferential intervals on the side wall of the single-column wind power platform 1.

[0057] like Figure 3 As shown, three sets of cable groups 3 are installed on the side wall of a single-column wind power platform 1. The three sets of cable groups 3 are evenly distributed at 120° to each other. The three sets of cable groups 3 are respectively connected to the anchoring foundation 6 of the seabed surface 20 via corresponding anchor chains 5, forming a mooring system.

[0058] like Figure 4 As shown, four sets of cable groups 3 are installed on the side wall of a single-column wind power platform 1. The four sets of cable groups 3 are evenly distributed at 90° to each other. The four sets of cable groups 3 are respectively connected to the anchoring foundation 6 of the seabed surface 20 via corresponding anchor chains 5, forming a mooring system.

[0059] The top of a single cable is secured to a lock on the side wall of the single-column wind power platform 1 via a shackle 2.

[0060] like Figure 6 As shown, the four-eye plate 8 has a circular structure. Four holes are provided circumferentially on the four-eye plate 8 for connecting two sets of cable groups 3 on adjacent single-column wind power platforms 1. The ends of individual cables are installed via shackles 80 and corresponding holes on the four-eye plate 8. Figure 8 As shown.

[0061] In this embodiment, the four holes on the four-eye plate 8 are divided into two groups that connect to the two adjacent single-column wind power platforms 1 respectively. The two groups of holes are symmetrically arranged to effectively ensure the stability and reliability of the connection structure.

[0062] like Figure 7 As shown, hemispherical floats 9 are symmetrically welded to both sides of the four-eye plate 8. The floats 9 further provide vertical restoring force during pitching and increase the effective restoring torque.

[0063] In this embodiment, the float 9 can be a steel buoyancy tank.

[0064] The anchoring foundation 6 uses a large holding power anchor which is a standard product on the market, and the large holding power anchor is embedded in the land quality of the seabed surface 20 to fix one end of the anchor chain 5 to the seabed.

[0065] In this embodiment, the anchor chain 5 is selected to be a heavy chain with a large wet weight, and is used to connect the anchoring foundation 6 and the upper cable group 3.

[0066] Through the heavy chain of the seabed section and the large holding power anchor, the mooring system is effectively prevented from walking off the anchor during use, and the horizontal mooring positioning capability of the mooring system is ensured.

[0067] In this embodiment, the cables in the cable group 3 can be made of synthetic fiber materials.

[0068] In this embodiment, the upper and lower cables are not directly connected to the anchoring foundation 6 on the seabed, but are connected to the water drum 4 through an anchor chain 5, and then the cable group 3 is connected to the anchor chain 5, thereby saving half of the anchor chain 5 and the anchoring foundation 6; and, there is a scale effect, the more the expanded floating unit is expanded, the smaller the ratio of the anchor chain to the wind power platform is, which also conforms to the rule that the offshore wind farm is concentratedly arranged in a good wind resource place, and has good economic efficiency.

[0069] Under the action of waves and currents, especially under the attack of extreme sea conditions such as deep-sea typhoons, the mooring system of this embodiment has good axial elasticity, can reduce the occurrence of extreme loads through a certain displacement under the action of high-frequency wave loads, and can firmly limit the horizontal position of the platform through an average force under the action of low-frequency slow drift force and currents. That is, the platform moves in response to the external environmental load, and the mooring cable bears the force to maintain the horizontal position of the platform; when the platform rolls under the action of the wind inclination torque, the upper cable on the windward side pulls the platform, and the lower cable on the leeward side also bears a large tension force when the platform rotates. Together, a restoring torque is formed to suppress the roll motion of the platform.

[0070] In this embodiment, the single-column wind power platform 1 can form a platform group to float in the target sea area, and can be moored and positioned and suppress roll motion; the outside of the single-column wind power platform 1 at the edge is moored to the seabed surface 20 through the cable group 3, the water drum 4, the anchor chain 5, and the anchoring foundation 6, and the inside of the single-column wind power platform 1 is associated with the mooring through the cable group 3 and the four-eye plate 8; the motion between adjacent single-column wind power platforms 1 will be related, thereby increasing the roll restoring torque, and the spherical buoy 9 on the four-eye plate 8 will also provide a vertical restoring force, further increasing the restoring torque.

[0071] As Figure 9As shown, by the mutual connection of six single-column wind power platforms 1 provided with three groups of cable groups 3, a single hexagonal wind power platform group is formed, the cable groups 3 on the outer sides of the six single-column wind power platforms 1 are connected to the anchoring bases 6 on the seabed surface 20 via corresponding anchor chains 5, forming a mooring system of the platform group; the adjacent single-column wind power platforms 1 are structurally connected via the cable groups 3 and four-eye plates 8.

[0072] As shown, the single-column wind power platform 1 is regularly expanded based on the hexagonal wind power platform group, and arranged in a structure of two rows and multiple columns. Figure 10 As shown, the single-column wind power platform 1 is regularly expanded based on the hexagonal wind power platform group, and arranged in a structure of two rows and multiple columns.

[0073] Figure 11 As shown, by the mutual connection of four single-column wind power platforms 1 provided with four groups of cable groups 3, a single square wind power platform group is formed, the cable groups 3 on the outer sides of the four single-column wind power platforms 1 are connected to the anchoring bases 6 on the seabed surface 20 via corresponding anchor chains 5, forming a mooring system of the platform group; the adjacent single-column wind power platforms 1 are structurally connected via the cable groups 3 and four-eye plates 8.

[0074] As shown, the single-column wind power platform 1 is regularly expanded based on the square wind power platform group, and arranged in a structure of two rows and multiple columns. Figure 12 As shown, the single-column wind power platform 1 is regularly expanded based on the square wind power platform group, and arranged in a structure of three rows and multiple columns.

[0075] Figure 13 As shown, the single-column wind power platform 1 is regularly expanded based on the square wind power platform group, and arranged in a structure of three rows and multiple columns.

[0076] The platform group composed of single-column wind power platforms 1 is regularly arranged, and has a shielding effect between each other, and the overall hydrodynamic force is less than the algebraic sum of the hydrodynamic force received by each single-column wind power platform 1.

[0077] On the one hand, the mooring system of the wind power platform group plays a conventional mooring positioning role, and maintains the horizontal position of the wind power platform group. Under the action of external environmental load, the mooring system has good horizontal restoring force for the floating wind power group, and the single-column wind power platforms 1 have good hydrodynamic shielding effect between each other. Under the action of high-frequency wave load, the wind power platform group can reduce the occurrence of extreme load through a certain displacement between each other. Under the action of low-frequency slow drift force and flow, the horizontal position of the platform group is firmly limited by an average force, that is, the platform moves in response to the external environmental load, and the mooring cable maintains the horizontal position of the floating wind power platform group.

[0078] ​​When the platform group is in pitch under the action of wind yawing moment, the upper synthetic fiber cable of the first wind power platform on the windward side will pull the platform, and the lower synthetic fiber cable on the leeward side will also bear a large tension, together forming a restoring moment to suppress the pitch motion of the platform. At this time, the lower synthetic fiber cable on the leeward side is equivalent to pulling the upper synthetic fiber of the next wind power platform, so that the next platform is tilted forward. Ingeniously, the pitch trend of each platform at this moment is the same, and the pitch motion of the next platform will also actively pull the same cable, suppressing the relative pitch trend of the associated platform.

[0079] The present application not only realizes reliable mooring of the single-column wind power platform, but also effectively suppresses the adverse pitch motion caused by the wind yawing moment, greatly improves the hydrodynamic performance of the wind power platform, helps to improve the structural use safety, and guarantees the improvement of power generation efficiency.

[0080] The above description is an explanation of the present application, not a limitation of the application, and the scope defined by the present application is referred to the claims. Within the protection scope of the present application, any form of modification can be made.

Claims

1. A floating monopole wind turbine platform mooring system, comprising a monopole wind turbine platform (1), characterized in that: Multiple cable groups (3) are installed circumferentially on the side wall of the single-column wind power platform (1). Each cable group (3) includes two cables arranged at an angle. One end of the two cables is installed on the wall of the single-column wind power platform (1) in an up-down distribution. The other end of the two cables is installed together on the end of the anchor chain (5) or on the four-eye plate (8). The bottom end of the anchor chain (5) is fixed to the seabed surface (20) via the anchor foundation (6). A water drum (4) is fitted at the junction of the anchor chain (5) and the cable. The water drum (4) is located at the waterline (10). The single-column wind power platform (1) includes multiple platforms. Adjacent single-column wind power platforms (1) are connected to each other as one unit through the installation of cable groups (3) and four-eye plates (8). The cable groups (3) located on the outer side of the single-column wind power platform (1) are connected to the anchoring foundation (6) on the seabed surface (20) through the corresponding anchor chains (5). The two cables in the single cable group (3) are of the same length and are located above and below the waterline (10) respectively. The two cables are arranged in a symmetrical manner. The water drum (4) is provided with a through hole (41) for the anchor chain (5) to pass freely upward. The top of the chain (5) is connected to the cable group (3) via an Ω-shaped shackle (7). The size of the Ω-shaped shackle (7) is larger than the diameter of the through hole (41). The Ω-shaped shackle (7) is located outside the top surface of the water drum (4). The ends of the two cables in the cable group (3) are jointly equipped with metal buckles, which are fastened to the arc-shaped part of the upper part of the Ω-shaped shackle (7). The two lower arms of the Ω-shaped shackle (7) are jointly locked to the anchor chain (5) via pins. The two lower arms of the Ω-shaped shackle (7) are arranged facing the top surface of the water drum (4). The outer dimensions of the two lower arms of the Ω-shaped shackle (7) are larger than the diameter of the through hole (41). The four-eye plate (8) is a circular structure. Four holes are provided on the four-eye plate (8) along the circumference for connecting two sets of cable groups (3) on adjacent single-column wind power platforms (1). The ends of the single cable are installed through the shackles (80) and the corresponding holes on the four-eye plate (8). The four-eyed plate (8) has hemispherical floats (9) symmetrically welded on both sides.

2. The floating monopole wind turbine platform mooring system as described in claim 1, characterized in that: The water drum (4) is a hollow steel buoyancy tank, and rubber strips are evenly distributed on the outer wall of the water drum (4).

3. The floating monopole wind turbine platform mooring system as described in claim 1, characterized in that: The single-column wind power platform (1) has three or four sets of cable groups (3) evenly installed along the circumferential interval on the side wall.

4. The floating monopole wind turbine platform mooring system as described in claim 1, characterized in that: The top of a single cable is locked and secured to the side wall of the single-column wind power platform (1) via a shackle (2).

5. A floating monopole wind turbine platform mooring system as described in claim 1, characterized in that: The anchoring foundation (6) is a high-holding-force anchor, which is embedded in the soil of the seabed surface (20).

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