A pendulum mooring device for a floating wind turbine and a floating wind turbine

Abstract

This application relates to the field of mooring devices, and discloses a pendulum mooring device and a floating wind turbine for a floating wind turbine, including: one end of an anchor chain is hinged to a connecting rod, and the other end of the anchor chain is used to connect to the floating wind turbine; both ends of the connecting rod are respectively hinged to a suction cylinder and a floating cylinder. Under the power generation condition of the floating wind turbine, the wave load is small, and the mooring restoring force is mainly provided by the weight of the anchor chain itself; while under extreme conditions, the wave load is very large, and the mooring restoring force is mainly generated by the change in the position of the buoyancy blocks, increasing the overall flexibility of the mooring device and avoiding excessive tension caused by the rapid straightening of the anchor chain. From an energy perspective, most of the kinetic energy generated by the movement of the floating wind turbine is converted into the potential energy of the gravity of the anchor chain and the buoyancy of the floating cylinder, and less energy is converted into the elastic potential energy of the anchor chain, thereby reducing the tension of the mooring anchor chain. Therefore, this application can reduce the maximum tension of the mooring device, thereby solving the problem of excessive mooring tension leading to too high cost of the mooring device.

Description

Technical Field

[0001] The present application relates to the field of mooring devices, and particularly to a pendulum mooring device for a floating wind turbine and a floating wind turbine. Background Art

[0002] Due to the gentle continental shelf and relatively shallow water depth in the offshore waters of our country, the water depth of the planned offshore wind farms generally does not exceed 60m. There are usually the following forms of shallow water mooring: catenary mooring, which mainly relies on the weight of the anchor chain to generate the restoring force; tensioned / semi-tensioned mooring, which mainly relies on the elasticity of the mooring line to generate the restoring force; single point mooring, which is divided into soft steel arm single point mooring and turret mooring system.

[0003] Currently, there are two existing floating prototypes. The mooring device of the "Yinlinghao" adopts semi-tensioned mooring, which is composed of an anchor chain and a wire cable, and heavy blocks are suspended on the anchor chain; the mooring device of the "Fuyaohao" adopts a catenary mooring system. When designing the mooring device of the floating wind turbine, due to multiple factors such as the weakening of the shallow water effect and the catenary effect, a very large tension is generated in the mooring device under extreme sea conditions. No matter which conventional mooring device is adopted, the cost of the mooring device remains high.

[0004] Therefore, how to reduce the mooring tension to reduce the cost of the mooring device is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present application is to provide a pendulum mooring device for a floating wind turbine and a floating wind turbine, which are used to reduce the mooring tension to reduce the cost of the mooring device.

[0006] To solve the above technical problems, the present application provides a pendulum mooring device for a floating wind turbine, including a mooring assembly, and the mooring assembly includes an anchor chain, a connecting rod, a suction cylinder and a floating cylinder;

[0007] One end of the anchor chain is hinged to the connecting rod, and the other end of the anchor chain is used to connect to the floating wind turbine; both ends of the connecting rod are respectively hinged to the suction cylinder and the floating cylinder.

[0008] Optionally, the connecting rod is respectively hinged to the suction cylinder and the floating cylinder through bearings.

[0009] Optionally, the floating cylinder is a cylindrical hollow steel pipe, and the bottom surface of the cylindrical hollow steel pipe is hinged to the connecting rod.

[0010] Optionally, reinforcing ribs are provided inside the cylindrical hollow steel pipe.

[0011] Optionally, the number of groups of the mooring assembly is at least 3 groups.

[0012] Optionally, the number of groups of the mooring components is three. All three groups of the mooring components are connected to the floating wind turbine through the anchor chain, and the connection points of the anchor chain and the floating wind turbine form a triangle.

[0013] The present application also provides a floating wind turbine, including the pendulum mooring device of the floating wind turbine described above.

[0014] The pendulum mooring device of a floating wind turbine provided by the present application includes mooring components. The mooring components include an anchor chain, a connecting rod, a suction bucket, and a floating barrel. One end of the anchor chain is hinged to the connecting rod, and the other end of the anchor chain is used to connect to the floating wind turbine. Both ends of the connecting rod are respectively hinged to the suction bucket and the floating barrel. Under the power generation condition of the floating wind turbine, the wave load is small, and the mooring restoring force is mainly provided by the weight of the anchor chain itself. Under extreme conditions, the wave load is very large, and the mooring restoring force is mainly generated by the position change of the buoyancy block, increasing the overall flexibility of the mooring device and avoiding excessive tension caused by the rapid straightening of the anchor chain. From the energy perspective, most of the kinetic energy generated by the movement of the floating wind turbine is converted into the potential energy of the gravity of the anchor chain and the buoyancy of the floating barrel, and less energy is converted into the elastic potential energy of the anchor chain, thereby reducing the tension of the mooring anchor chain. Therefore, the present application can reduce the maximum tension of the mooring device, thereby solving the problem of excessive mooring tension resulting in too high cost of the mooring device.

[0015] The floating wind turbine provided by the present application includes the pendulum mooring device of the floating wind turbine mentioned above, and the specific effects are as above. Description of the Drawings

[0016] In order to more clearly illustrate the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a structural diagram of a pendulum mooring device of a floating wind turbine provided by an embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of a pendulum mooring device positioning a floating wind turbine provided by an embodiment of the present application;

[0019] The reference numerals are as follows: 1 is the anchor chain, 2 is the connecting rod, 3 is the connecting rod, 4 is the floating barrel, and 5 is the floating wind turbine. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0021] The core of the present application is to provide a pendulum mooring device for a floating wind turbine and a floating wind turbine.

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 The following is a structural diagram of a pendulum mooring device for a floating wind turbine provided in an embodiment of the present application. As Figure 1 shown, the pendulum mooring device of the floating wind turbine includes a mooring assembly. The mooring assembly includes an anchor chain 1, a connecting rod 2, a suction bucket 3, and a buoy 4. One end of the anchor chain 1 is hinged to the connecting rod 2, and the other end of the anchor chain 1 is used to connect to the floating wind turbine 5. Both ends of the connecting rod 2 are respectively hinged to the suction bucket 3 and the buoy 4.

[0024] In the embodiment of the present application, the hinged manner of the connecting rod 2 with the suction bucket 3 and the buoy 4 is not specifically limited. The connecting rod 2 can be hinged to the suction bucket 3 and the buoy 4 respectively through bearings, and the bearings can reduce the wear between the connecting rod 2 and the suction bucket 3, as well as between the connecting rod 2 and the buoy 4. The suction bucket 3 is used to be fixed below the seabed mud surface; the buoy 4 can float on the sea surface. When the floating wind turbine 5 is in the power generation condition, the wave load is small, the horizontal displacement is small, and the mooring restoring force is mainly provided by the weight of the anchor chain 1 itself. However, in the extreme condition, the wave load of the floating wind turbine 5 is large, the horizontal displacement is large, and the anchor chain 1 pulls the connecting rod 2 to change the vertical height of the buoy 4, increasing the flexibility of the mooring device and effectively avoiding the anchor chain 1 from being quickly straightened to generate excessive tension, thereby greatly reducing the mooring tension. From the energy perspective, most of the kinetic energy generated by the movement of the floating wind turbine 5 is converted into the potential energy of the gravity of the anchor chain 1 and the buoyancy of the buoy 4, and less energy is converted into the elastic potential energy of the anchor chain 1, thereby reducing the tension of the mooring anchor chain.

[0025] Furthermore, the buoy 4 can be a cylindrical hollow steel pipe, and the bottom surface of the cylindrical hollow steel pipe is hinged to the connecting rod 2; and by designing the buoy 4 into a cylindrical shape, the wave force can be reduced. Based on this, reinforcing ribs can also be provided inside the cylindrical hollow steel pipe; by setting the reinforcing ribs, without increasing the wall thickness of the buoy 4, the strength and rigidity of the buoy 4 can be enhanced, so as to save the material consumption, reduce the weight, and lower the cost.

[0026] In the embodiments of the present application, the number of mooring component groups is not specifically limited. To meet the positioning requirements of the floating wind turbine 5, the number of mooring component groups is at least 3 groups. At the same time, to save costs, the number of mooring component groups is 3 groups. All 3 groups of mooring components are connected to the floating wind turbine 5 through the anchor chain 1, and the connection points of the anchor chain 1 and the floating wind turbine 5 form a triangle.

[0027] Figure 2 It is a schematic diagram of a pendulum mooring device for positioning a floating wind turbine provided by the embodiments of the present application. As Figure 2 shown, the suction bucket 3 and the connecting rod 2 are not shown. The suction bucket 3 is arranged on the seabed, and 3 suction buckets 3 form a triangle. The floating pontoons 4 on the sea surface also form a triangle. The floating wind turbine 5 is located in the middle of the triangle formed by the 3 pontoons 4. All 3 anchor chains 1 in the mooring components are connected to the floating wind turbine 5. Based on the stability of the triangle, the floating wind turbine 5 can be positioned on the sea surface relatively stably.

[0028] A pendulum mooring device for a floating wind turbine provided by the embodiments of the present application includes a mooring component. The mooring component includes an anchor chain, a connecting rod, a suction bucket, and a pontoon. One end of the anchor chain is hinged to the connecting rod, and the other end of the anchor chain is used to connect to the floating wind turbine. Both ends of the connecting rod are respectively hinged to the suction bucket and the pontoon. Under the power generation condition of the floating wind turbine, the wave load is small, and the mooring restoring force is mainly provided by the weight of the anchor chain itself; while in the extreme condition, the wave load is very large, and the mooring restoring force is mainly generated by the position change of the buoyancy block, increasing the overall flexibility of the mooring device and avoiding excessive tension caused by the rapid straightening of the anchor chain. From the energy perspective, most of the kinetic energy generated by the movement of the floating wind turbine is converted into the potential energy of the gravity of the anchor chain and the buoyancy of the pontoon, and less energy is converted into the elastic potential energy of the anchor chain, thereby reducing the tension of the mooring anchor chain. Therefore, the present application can reduce the maximum tension of the mooring device, thereby solving the problem of excessive mooring tension resulting in too high cost of the mooring device.

[0029] Secondly, only 3 anchor chains are required to meet the positioning requirements of the floating wind turbine. Under the same conditions, a conventional catenary mooring system requires 6 or 9 mooring lines.

[0030] Finally, the present application also provides a floating wind turbine, including the pendulum mooring device of the floating wind turbine mentioned above. Since the components have been described in detail above, they will not be repeated in this embodiment.

[0031] The floating wind turbine provided by the embodiment of the present application includes the pendulum mooring device of the floating wind turbine mentioned above. The pendulum mooring device includes a mooring assembly, and the mooring assembly includes an anchor chain, a connecting rod, a suction bucket and a floating barrel; one end of the anchor chain is hinged to the connecting rod, and the other end of the anchor chain is used to connect to the floating wind turbine; both ends of the connecting rod are respectively hinged to the suction bucket and the floating barrel. Under the power generation condition of the floating wind turbine, the wave load is small, and the mooring restoring force is mainly provided by the weight of the anchor chain itself; while under the extreme condition, the wave load is very large, and the mooring restoring force is mainly generated by the position change of the buoyancy block, increasing the overall flexibility of the mooring device and avoiding excessive tension caused by the rapid straightening of the anchor chain. From the energy perspective, most of the kinetic energy generated by the movement of the floating wind turbine is converted into the potential energy of the gravity of the anchor chain and the buoyancy of the floating barrel, and less energy is converted into the elastic potential energy of the anchor chain, thereby reducing the tension of the mooring anchor chain. Therefore, the present application can reduce the maximum tension of the mooring device, thereby solving the problem of excessive mooring tension resulting in too high cost of the mooring device.

[0032] The pendulum mooring device and the floating wind turbine of a floating wind turbine provided by the present application have been introduced in detail above. The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0033] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

Claims

1. A pendulum mooring device for a floating wind turbine, characterized in that, Comprising a mooring assembly, the mooring assembly includes an anchor chain (1), a connecting rod (2), a suction bucket (3) and a buoy (4); One end of the anchor chain (1) is hinged to the connecting rod (2), and the other end of the anchor chain (1) is used to connect to a floating wind turbine (5); both ends of the connecting rod (2) are respectively hinged to the suction bucket (3) and the buoy (4); The connecting rod (2) is respectively hinged to the suction bucket (3) and the buoy (4) through bearings; The buoy (4) is a cylindrical hollow steel pipe, and the bottom surface of the cylindrical hollow steel pipe is hinged to the connecting rod (2); Reinforcing ribs are provided inside the cylindrical hollow steel pipe; The number of groups of the mooring assemblies is 3, and the 3 groups of mooring assemblies are all connected to the floating wind turbine (5) through the anchor chain (1), and the connection points of the anchor chain (1) and the floating wind turbine (5) form a triangle.

2. A floating wind turbine, characterized in that, A pendulum mooring device for a floating wind turbine according to claim 1.

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