Floating offshore foundation and offshore wind energy generation system

Abstract

Floating offshore foundation, characterized in that it comprises: a floating base that is buoyant in seawater and serves to support a wind turbine; a single-point mooring system comprising a mooring buoyancy cylinder and a mooring linkage, the mooring buoyancy cylinder being buoyant in seawater, the mooring linkage being connected between the mooring buoyancy cylinder and the floating base; wherein the anchoring rod is connected to the anchoring floating cylinder by a ball joint structure; and / or wherein the anchoring rod is connected to the floating base by a ball joint structure.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of offshore structures, in particular to a floating offshore foundation and an offshore wind energy generation system. STATE OF THE ART

[0002] Wind power generation is a clean and renewable energy generation technology. Offshore wind power generation is currently one of the most important development directions in the wind energy industry. Due to the abundance of wind energy resources, offshore wind power generation has great development potential, especially in deep and distant waters. Floating wind power generation is a wind energy technology tailored to the needs of development in high and distant waters.

[0003] The prior art develops a design scheme for a floating wind energy generation system in which a rigid structure is connected to an anchored foundation, and the rigid structure is firmly connected to a floating base. Under the action of waves, the floating base exerts a high torque on the rigid structure, posing a risk of fracture of the rigid structure and compromising structural reliability. CONTENT OF THE PRESENT INVENTION

[0004] The purpose of the present invention is to solve at least one of the existing problems in the prior art. Therefore, one of the purposes of the present invention is to provide a floating offshore foundation that can be used to rotate the floating base around the center point of the single-point mooring system, thereby causing the floating base to oscillate in a specific manner along the longitudinal and transverse directions, thereby reducing the force generated by waves on the mooring rods through the floating base, thereby extending the service life of the mooring rods, improving the reliability of the floating offshore foundation, and improving the reliability of the offshore wind power generation system.

[0005] The present invention further provides an offshore wind power generation system having the above floating offshore foundation.

[0006] According to an embodiment of the first aspect of the present invention, the floating offshore foundation comprises: a floating base that is buoyant in seawater and serves to support a wind turbine; a single-point mooring system comprising a mooring flotation cylinder and a mooring linkage, wherein the mooring flotation cylinder is buoyant in seawater, wherein the mooring linkage is connected between the mooring flotation cylinder and the floating base; wherein the mooring linkage is connected to the mooring flotation cylinder by a ball joint structure; and / or wherein the mooring linkage is connected to the floating base by a ball joint structure.

[0007] According to the floating offshore foundation in the present invention, the floating base can be made to rotate around the center point of the single-point mooring system by connecting the mooring linkage to the floating base through a ball joint structure or by connecting the mooring linkage to the mooring floating cylinder through a ball joint structure, whereby the floating base can be made to swing around the center point of the ball joint structure along the longitudinal direction and the transverse direction in a certain manner, thereby reducing the force generated by waves on the mooring linkage through the floating base, thereby prolonging the service life of the mooring linkage, which improves the reliability of the floating offshore foundation and improves the reliability of the offshore wind power generation system.

[0008] According to some embodiments of the present invention, the floating offshore foundation further comprises a slew limiting table and a slew linkage, wherein the slew linkage comprises a first end and a second end, wherein the first end and the second end are respectively connected to the floating base and the single point anchoring system, wherein at least the floating base and / or the single point anchoring system is / are provided with the slew limiting table, wherein the slew linkage is connected to the slew limiting table, and preferably wherein the slew linkage is movably connected to the slew limiting table.

[0009] In some embodiments of the present invention, the pivot limiting table comprises a longitudinal pivot limiting table, wherein the longitudinal pivot limiting table is provided with a first movable bore, wherein the first movable bore extends in an upward and downward direction, wherein the first end is passed through the first movable bore, while the first end is movable in an extension direction of the first movable bore; and / or that the longitudinal pivot limiting table is provided with a first movable bore, wherein the first movable bore extends in an axial direction of the anchoring rod, wherein the first end is passed through the first movable bore, while the second end is movable in the extension direction of the first movable bore.

[0010] In some embodiments of the present invention, the pivot limiting table comprises a transverse pivot limiting table, the transverse pivot limiting table being provided with a second movable bore, the second movable bore being arc-shaped, a circle center of an extended arc of the second movable bore coinciding with a rotation center of the ball joint structure, the second end being passed through the second movable bore, the second end being movable in the extension direction of the second movable bore.

[0011] In some embodiments of the present invention, the floating base is provided symmetrically along a central axis of the anchoring rod.

[0012] According to some optional embodiments of the present invention, the floating base comprises three floating cylinders, wherein the three floating cylinders are arranged in a triangular row, wherein two adjacent floating cylinders are connected by a transverse truss structure, wherein the anchoring linkage is connected to one of the transverse truss structures; or wherein the anchoring linkage is connected to one of the transverse truss structures.

[0013] According to some optional embodiments of the present invention, the floating offshore foundation further comprises a support tube rack and a support table, wherein the support table is spaced from the floating base along a longitudinal direction and serves to support the wind turbine, wherein the support tube rack extends along the longitudinal direction and is connected between the support table and the floating base, wherein the number of support tube racks is the same as the number of floating cylinders and wherein the support tube rack 51 corresponds one to one to the floating cylinder 11, wherein three of the support tube racks are connected to the support table at an end remote from the floating cylinders.

[0014] According to some optional embodiments of the present invention, the projection of the support table on the floating base is located in the extension direction of the anchoring rod.

[0015] According to some embodiments of the present invention, the anchoring rod is connected to one of the transverse truss structures, the projection of the support table on the floating base is located on the transverse truss structure connected to the anchoring rod.

[0016] According to an embodiment of the second aspect of the present invention, the offshore wind power generation system comprises a floating offshore foundation according to the embodiment of the first aspect of the present invention and a wind turbine provided on the floating base, wherein the wind turbine faces the mooring floating cylinder in the extension direction of the mooring rods.

[0017] According to the offshore wind power generation system of the present invention, the above floating offshore foundation improves the reliability of the floating offshore foundation and the offshore wind power generation system.

[0018] Additional aspects and advantages of the present invention will be apparent in part from the following description or from practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following attached drawings, in which: Fig. 1 is a three-dimensional representation of an offshore wind energy generation system according to some embodiments of the present invention; Fig. 2 a schematic representation of the substructure of the offshore wind energy generation system of Fig. 1; Fig. 3 a side view of the offshore wind energy generation system of Fig. 1; Fig. 4 a sectional view along the line AA in Fig. 3; Fig. 5 a main view of the offshore wind energy generation system of Fig. 1; Fig. 6 a side view of the offshore wind energy generation system of Fig. 1, wherein the floating base is rotated to a maximum angle along an extension direction of the anchoring rod in a direction facing the anchoring floating cylinder; Fig. 7 a side view of the offshore wind energy generation system of Fig. 1, wherein the floating base is rotated to a maximum angle along an extension direction of the anchoring rod in a direction away from the anchoring floating cylinder; Fig. 8 a main view of the offshore wind energy generation system of Fig. 4, wherein the floating base is rotated at a maximum angle along a radial direction of the anchoring rod. Reference list symbol:

[0020] 100. Offshore wind energy generation system; 10. floating offshore foundation; 1. Floating base; 11. Floating cylinder; 12. Transverse truss structure; 2. Single-point anchoring system; 21. Anchoring floating cylinder; 22. Anchoring rods; 23. Anchor chain; 3. Second ball joint structure; 31. Second ball head; 32. Second ball seat; 4. Longitudinal swing limiting table; 411. First movable hole; 42. Swing linkage; 421. First end; 422. Second end; 43. Transverse swivel limit table; 431. Second movable bore; 51. Support tube frame; 52. Support table; 60. Wind turbine; 61. Impeller. DETAILED DESCRIPTION

[0021] Embodiments of the present invention will be described in detail below, and examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar designations refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and serve only to illustrate the present invention and are not to be construed as limiting the present invention.

[0022] In the following, a floating offshore foundation 10 according to an embodiment of the present invention will be described with reference to the attached drawings.

[0023] As in Fig. 1 to 8, according to an embodiment of the first aspect of the present invention, the floating offshore foundation 10 comprises a floating base 1 and a single point anchoring system 2, wherein the floating base 1 is buoyant in seawater and the floating base 1 serves to support a wind turbine 60.

[0024] The single-point mooring system 2 comprises a mooring buoyancy cylinder 21 and a mooring linkage 22, wherein the mooring buoyancy cylinder 21 is buoyant in seawater. For example, the single-point mooring system 2 may further comprise a plurality of anchor chains 23, wherein the plurality of anchor chains 23 are all connected to the mooring buoyancy cylinder 21 and extend in different directions to secure the mooring buoyancy cylinder 21 relative to the seabed.

[0025] The anchoring rod 22 is connected between the anchoring floating cylinder 21 and the floating base 1. The anchoring floating cylinder 21 is intended for connection to the floating base 1.

[0026] As in Fig. As shown in Figures 6 to 7, when the sea current direction is at an angle to the extension direction of the mooring rod 22, the sea current can cause the floating base 1 to rotate around a center point of the mooring floating cylinder 21 until the sea current direction is parallel to the extension direction of the mooring rod 22. In this way, the mooring rod 22 can be loaded in its axial direction, the shear force absorbed by the mooring rod 22 in a radial direction is reduced, the reliability of the mooring rod 22 is improved, and the service life of the mooring rod 22 is extended.

[0027] As in Fig. As shown in Figure 8, when the sea wind direction is at an angle to the extension direction of the mooring rod 22, the sea wind can cause the floating base 1 to rotate around a center point of the mooring floating cylinder 21 until the sea wind direction is parallel to the extension direction of the mooring rod 22. In this way, the mooring rod 22 can be loaded in its axial direction, the shear force absorbed by the mooring rod 22 in a radial direction is reduced, the reliability of the mooring rod 22 is improved, and the service life of the mooring rod 22 is extended.

[0028] When the floating offshore foundation 10 is provided in the offshore wind power generation system 100, this allows the impeller 61 of the wind turbine 60 to always be directly aligned with the sea wind, and an active yaw mechanism for driving the floating offshore foundation 10 to rotate so that the impeller 61 is always directly aligned with the sea wind can be omitted, thereby saving the production cost of the floating offshore foundation 10.

[0029] The anchoring rod is connected to the anchoring floating cylinder by a ball joint structure; and / or the anchoring rod is connected to the floating base by a ball joint structure. For example, one end of the anchoring rod 22 can be connected to the anchoring floating cylinder 21 by a ball joint structure, and the other end of the anchoring rod 22 is fixedly connected to the floating base 1; one end of the anchoring rod 22 can be fixedly connected to the anchoring floating cylinder 21, and the other end of the anchoring rod 22 is connected to the floating base 1 by the ball joint structure; both ends of the anchoring rod 22 can be connected to the anchoring floating cylinder 21 and the floating base 1 by the ball joint structure, respectively.

[0030] For example, the ball joint structure for connecting the anchoring rod 22 to the anchoring floating cylinder 21 is a first ball joint structure, the first ball joint structure may comprise a first ball head and a first ball seat, wherein the first ball seat comprises a first spherical groove, wherein the first ball head is rotatably provided in the first spherical groove and the first ball head and the first ball seat are respectively connected to the anchoring rod 22 and the anchoring floating cylinder 21.

[0031] In the case where one end of the anchoring rod 22 is connected to the anchoring floating cylinder 21 by a ball joint structure and the other end of the anchoring rod 22 is fixedly connected to the floating base 1, as shown in Fig. 6 and Fig. 7, when the wave fluctuation direction is parallel to the extension direction of the anchoring rod 22, the floating base 1 can cause the anchoring rod 22 to rotate around the rotation center of the first ball joint structure in a direction facing the anchoring floating cylinder 21 under the action of the wave, and the floating base 1 can rotate around the rotation center of the first ball joint structure in a direction away from the anchoring floating cylinder 21 under the action of the wave, that is, the floating base 1 can swing in a longitudinal direction.In this way, the floating base 1 can absorb the wave energy acting on the floating base 1 by rotating along the extending direction of the anchoring rod 22 relative to the anchoring floating cylinder 21, so that less energy is transmitted from the floating base 1 to the anchoring rod 22, whereby the torsional force exerted by the waves through the floating base 1 on the anchoring rod 22 can be reduced, so that the anchoring rod 22 can firmly connect the anchoring floating cylinder 21 and the floating base 1, thereby improving the reliability of the anchoring rod 22 and extending the service life of the anchoring rod 22.

[0032] In the case where one end of the anchoring rod 22 is connected to the anchoring floating cylinder 21 by a ball joint structure and the other end of the anchoring rod 22 is fixedly connected to the floating base 1, as shown in Fig. 8, when the wave fluctuation direction intersects with the extension direction of the anchoring rod 22, the floating base 1 can cause the anchoring rod 22 to rotate around the rotation center of the first ball joint structure in a radial direction of the anchoring rod 22 under the action of the wave, that is, the floating base 1 can swing in a transverse direction.In this way, the floating base 1 can absorb the wave energy acting on the floating base 1 by rotating along the radial direction of the anchoring rod 22, so that less energy is transmitted from the floating base 1 to the anchoring rod 22, whereby the torsional force exerted by the waves through the floating base 1 on the anchoring rod 22 can be reduced, so that the anchoring rod 22 can firmly connect the anchoring floating cylinder 21 and the floating base 1, thereby improving the reliability of the anchoring rod 22 and extending the service life of the anchoring rod 22.

[0033] The ball joint structure is connected to the mooring floating cylinder 21, and when the floating base 1 rotates around the rotation center of the ball joint structure in the extending direction of the mooring linkage 22, the mooring linkage 22 has a certain length, which can increase the rotation radius of the floating base 1, so that the mooring floating cylinder 21 can exert a certain limiting effect on the rotation of the floating base 1 through the mooring linkage 22, the rotation angle of the floating base 1 is reduced, so that the floating base 1 can float more smoothly on the sea, so that the floating base 1 can reliably and stably provide a support for the wind turbine 60 and improve the stability of the offshore wind power generation system 100.

[0034] For example, as in Fig. 1 and Fig. 2, the ball joint structure for connecting the anchoring rod 22 to the floating base 1 is a second ball joint structure 3, the second ball joint structure 3 may comprise a second ball head 31 and a second ball seat 32, wherein the second ball seat 32 comprises a second spherical groove, wherein the second ball head 31 is rotatably provided in the second spherical groove and the second ball head 31 and the second ball seat 32 are each connected to the anchoring rod 22 and the floating base 1, respectively.

[0035] In the case where one end of the anchoring rod 22 is fixedly connected to the anchoring floating cylinder 21 and the other end of the anchoring rod 22 is connected to the floating base 1 by the ball joint structure, as shown in Fig. 6 and Fig. 7, when the wave fluctuation direction is parallel to the extension direction of the anchoring rod 22, the floating base 1 can rotate around the rotation center of the second ball joint structure 3 in a direction facing the anchoring floating cylinder 21 under the action of the wave, and the floating base 1 can rotate around the rotation center of the second ball joint structure 3 in a direction facing away from the anchoring floating cylinder 21 under the action of the wave, that is, the floating base 1 can swing in a longitudinal direction.In this way, the floating base 1 can absorb the wave energy acting on the floating base 1 by rotating along the extending direction of the anchoring rod 22 relative to the anchoring floating cylinder 21, so that less energy is transmitted from the floating base 1 to the anchoring rod 22, whereby the torsional force exerted by the waves through the floating base 1 on the anchoring rod 22 can be reduced, so that the anchoring rod 22 can firmly connect the anchoring floating cylinder 21 and the floating base 1, thereby improving the reliability of the anchoring rod 22 and extending the service life of the anchoring rod 22.

[0036] By connecting the ball joint structure to the floating base 1, when the floating base 1 is rotated around the center of rotation of the ball joint structure in the extension direction of the anchoring rod 22, the rotation radius of the floating base 1 can be reduced, so that the floating base 1 can be rotated at a larger angle relative to the anchoring floating cylinder 21, whereby the floating base 1 can absorb the energy of the waves more effectively. As a result, the energy transmitted from the floating base 1 to the anchoring rod 22 can be effectively and reliably reduced, whereby the torsional force exerted by the waves through the floating base 1 on the anchoring rod 22 can be reduced, so that the anchoring rod 22 can firmly connect the anchoring floating cylinder 21 and the floating base 1.thereby improving the reliability of the anchoring rod 22 and extending the service life of the anchoring rod 22.

[0037] In the case where one end of the anchoring rod 22 is fixedly connected to the anchoring floating cylinder 21 and the other end of the anchoring rod 22 is connected to the floating base 1 by the ball joint structure, as shown in Fig. 8, when the wave fluctuation direction intersects with the extension direction of the anchoring rod 22, the floating base 1 can rotate around the rotation center of the second ball joint structure 3 in a radial direction of the anchoring rod 22 under the action of the wave, that is, the floating base 1 can swing in a transverse direction.In this way, the floating base 1 can absorb the wave energy acting on the floating base 1 by rotating along the radial direction of the anchoring rod 22, so that less energy is transmitted from the floating base 1 to the anchoring rod 22, whereby the torsional force exerted by the waves through the floating base 1 on the anchoring rod 22 can be reduced, so that the anchoring rod 22 can firmly connect the anchoring floating cylinder 21 and the floating base 1, thereby improving the reliability of the anchoring rod 22 and extending the service life of the anchoring rod 22.

[0038] In the case where both ends of the anchoring rod 22 can be connected to the anchoring floating cylinder 21 and the floating base 1 respectively by the ball joint structure, as shown in Fig. 6 and Fig. 7, when the wave fluctuation direction is parallel to the extension direction of the anchoring linkage 22, the floating base 1 can rotate around the rotation center of the second ball joint structure 3 in an extension direction of the anchoring linkage 22 under the action of the wave, that is, the floating base 1 performs a first rotation operation, and when the floating base 1 rotates around the rotation center of the second ball joint structure 3 in the extension direction of the anchoring linkage 22 to a maximum angle, the floating base 1 can cause the anchoring linkage 22 to rotate around the rotation center of the first ball joint structure in the radial direction of the anchoring linkage 22, that is, the floating base 1 performs a second rotation operation, that is, the floating base 1 can perform two rotation operations in the longitudinal direction.

[0039] In this way, the floating base 1 can have a larger rotation angle in the extending direction of the anchoring rod 22, so that the floating base 1 can better absorb the energy of the waves acting on the floating base 1 due to the two rotations, effectively reduce the energy transmitted from the floating base 1 to the anchoring rod 22, and reduce the torsional force exerted by the waves on the anchoring rod 22 by the floating base 1. Furthermore, the anchoring rod 22 can exert a limiting effect on the floating base 1 during the second rotation, so that the rotation angle of the floating base 1 is not too large, thereby effectively ensuring the stability of the floating base 1.

[0040] In the case where both ends of the anchoring rod 22 can be connected to the anchoring floating cylinder 21 and the floating base 1 respectively by the ball joint structure, as shown in Fig. 8, when the wave fluctuation direction intersects with the extending direction of the anchoring rod 22, the floating base 1 can rotate around the rotation center of the second ball joint structure in a radial direction of the anchoring rod 22 under the action of the wave, that is, the floating base 1 can swing in a transverse direction.In this way, the floating base 1 can absorb the wave energy acting on the floating base 1 by rotating along the radial direction of the anchoring rod 22, so that less energy is transmitted from the floating base 1 to the anchoring rod 22, whereby the torsional force exerted by the waves through the floating base 1 on the anchoring rod 22 can be reduced, so that the anchoring rod 22 can firmly connect the anchoring floating cylinder 21 and the floating base 1, thereby improving the reliability of the anchoring rod 22 and extending the service life of the anchoring rod 22.

[0041] According to the offshore floating foundation 10 in the present invention, the floating base 1 can be made to rotate around the center point of the single-point anchoring system 2 by connecting the anchoring rod 22 to the floating base 1 through a ball joint structure or by connecting the anchoring rod 22 to the anchoring floating cylinder 21 through a ball joint structure, whereby the floating base 1 can be made to swing around the center point of the ball joint structure along the longitudinal direction and the transverse direction in a certain manner, thereby reducing the force generated by waves on the anchoring rod 22 through the floating base 1, thereby extending the service life of the anchoring rod 22, which improves the reliability of the offshore floating foundation 10 and improves the reliability of the offshore wind power generation system 100.

[0042] As in Fig. 1 to 8, according to some embodiments of the present invention, the floating offshore foundation further comprises a slew limiting table 41 and a slew linkage 42, wherein the slew linkage 42 comprises a first end 421 and a second end 422, wherein the first end 421 and the second end 422 are connected to the floating base 1 and the single point anchoring system 2, respectively, wherein the slew limiting table is located on the floating base 1 and / or the single point anchoring system 2, wherein the slew linkage 42 is connected to the slew limiting table, wherein the slew linkage is movably connected to the slew limiting table.

[0043] The floating base 1 and the mooring floating cylinder 21 are connected to each other by the swing limiting table and the swing linkage 42, and the swing limiting table and the swing linkage 42 cooperate, which can exert a certain limiting effect on the rotation of the floating base 1, so that the floating base 1 can swing within a predetermined range, thereby making the floating base 1 float more smoothly on the sea, thereby reducing or avoiding the risk of damage to the wind turbine 60 caused by a large vibration amplitude of the floating base 1, and improving the reliability of the offshore floating foundation 10.

[0044] As in Fig. 1 to 3, in some embodiments of the present invention, the pivot limiting table comprises a longitudinal pivot limiting table 41, wherein the longitudinal pivot limiting table 41 is provided with a first movable bore 411, the first movable bore 411 extending in an up-and-down direction, the first end 421 passing through the first movable bore 411, while the first end 421 is movable in an extending direction of the first movable bore 411. For example, the second end 422 may be rotatably connected to the floating base 1.

[0045] During the rotation of the floating base 1 in the extending direction of the anchoring rod 22, the pivot rod 42 of the floating base 1 can follow in the extending direction of the anchoring rod 22, and the first end 421 of the pivot rod 42 can be moved in the up and down direction by the action of the floating base 1.By arranging the first movable hole 411 to extend along the up-and-down direction, the first movable hole 411 can be arranged to form a better fit with the first end 421 of the swing link 42, so that the longitudinal swing limiting table 41 can limit the first end 421 through the first movable hole 411 in the up-and-down direction, thereby realizing the limitation of the rotation angle of the floating base 1 in the extending direction of the anchor link 22, and the rotation angle of the floating base 1 in the extending direction of the anchor link 22 is limited to a predetermined range, and the structure is simple.

[0046] As in Fig. 1 to 3, 6 and 7, in some embodiments the pivot limiting table comprises a longitudinal pivot limiting table 41, wherein the longitudinal pivot limiting table 41 is provided with a first movable bore 411, wherein the first movable bore 411 extends in an axial direction of the anchoring rod 22, wherein the first end 421 is passed through the first movable bore 411, while the second end 422 is movable in the extension direction of the first movable bore 411.

[0047] When the longitudinal swing limiting table 41 is connected to the anchoring floating cylinder 21 and the second end 422 is connected to the floating base 1, during the rotation of the floating base 1 in the extension direction of the anchoring linkage 22, the swing linkage 42 can follow the rotation of the floating base 1 in the extension direction of the anchoring linkage 22, and the first end 421 of the swing linkage 42 can be moved in a predetermined manner in the axial direction of the swing linkage 42 by the action of the floating base 1. For example, the second end 422 can be rotatably connected to the floating base 1.

[0048] When the longitudinal pivot limiting table 41 is connected to the floating base 1 and the second end 422 is connected to the anchoring floating cylinder 21, during the rotation of the floating base 1 in the extension direction of the anchoring rod 22, the pivot rod 42 can rotate relative to the floating base 1 in the extension direction of the anchoring rod 22, and the first end 421 of the pivot rod 42 can be moved relative to the floating base 1 in the axial direction of the pivot rod 42 in a predetermined manner. For example, the second end 422 can be rotatably connected to the anchoring floating cylinder 21.

[0049] By arranging the first movable hole 411 to extend along the axial direction of the anchoring linkage 22, the first movable hole 411 can be arranged to form a better fit with the first end 421 of the swing linkage 42, so that the longitudinal swing limiting table 41 can limit the first end 421 through the first movable hole 411 in the axial direction of the anchoring linkage 22, thereby realizing the limitation of the rotation angle of the floating base 1 in the extending direction of the anchoring linkage 22, and the rotation angle of the floating base 1 in the extending direction of the anchoring linkage 22 is limited to a predetermined range, and the structure is simple.

[0050] As in the Fig. 1, Fig. 2, Fig. 5 and Fig. 8, in some embodiments of the present invention, the pivot limiting table comprises a transverse pivot limiting table 43, the transverse pivot limiting table 43 being provided with a second movable bore 431, the second movable bore 431 being arcuate, a circle center of an extended arc of the second movable bore 431 coinciding with a rotation center of the ball joint structure, the second end 422 being passed through the second movable bore 431, the second end 422 being movable in the extension direction of the second movable bore 431.

[0051] When the transverse swing limiting table 43 is provided on the anchoring floating cylinder 21 and the first end 421 is connected to the floating base 1, during the rotation of the floating base 1 in the radial direction of the anchoring linkage 22, the swing linkage 42 can follow the floating base 1 in the radial direction of the anchoring linkage 22 for rotation, and the second end 422 of the swing linkage 42 can rotate by the action of the floating base 1 in the radial direction of the swing linkage 42 relative to the ball joint structure, that is, a circle center of a rotation arc of the second end 422 coincides with a rotation center of the ball joint structure.

[0052] When the transverse swing limiting table 43 is mounted on the floating base 1 and the first end 421 is connected to the anchoring floating cylinder 21, during the rotation of the floating base 1 in the radial direction of the anchoring linkage 22, the swing linkage 42 can rotate relative to the floating base 1 in the radial direction of the anchoring linkage 22, and the second end 422 of the swing linkage 42 can rotate relative to the floating base 1 in the radial direction of the swing linkage 42 relative to the ball joint structure, that is, a circle center of a rotation arc of the second end 422 relative to the floating base coincides with a rotation center of the ball joint structure.

[0053] By arranging the second movable hole 431 so that its circular center of a straight arc coincides with the rotation center of the ball joint structure, the second movable hole 431 can be arranged to form a better fit with the second end 422 of the swing link 42, so that the transverse swing limiting table 43 can limit the second end 422 through the second movable hole 431 in the radial direction of the anchor link 22, thereby realizing the limitation of the rotation angle of the floating base 1 in the radial direction of the anchor link 22, and the rotation angle of the floating base 1 in the radial direction of the anchor link 22 is limited to a predetermined range to improve the anti-tilt ability of the floating base 1, and the structure is simple.

[0054] As in Fig. 4, according to some embodiments of the present invention, the floating base is provided symmetrically along a central axis of the anchoring rod.For example, the outer contour of the floating base 1 may be an isosceles triangle or a positive polygonal shape; if the outer contour of the floating base 1 is a positive polygonal shape, the connection point of the anchoring rod 22 to the floating base 1 may be located at one of the points on the outer contour of the floating base 1, and the connection point of the anchoring rod 22 to the floating base 1 may be in the middle of one of the sides of the outer contour of the floating base 1; if the outer contour of the floating base 1 is an isosceles triangle, the connection point of the anchoring rod 22 to the floating base 1 may be located at a vertex of the outer contour of the floating base 1 opposite the bottom, and the connection point of the anchoring rod 22 to the floating base 1 may also be in the middle of the bottom of the outer contour of the floating base 1.In this way, the floating base 1 has approximately the same weight on both sides of the central axis of the anchoring rod 22, so that the central axis of the anchoring rod approximately passes through the center of gravity of the floating base 1, so that the floating base 1 can swing more stably in the radial direction of the anchoring rod 22.

[0055] As in Fig. 1 to 4, according to some optional embodiments of the present invention, the floating base 1 comprises three floating cylinders 11, the three floating cylinders 11 being arranged in a triangular row, with two adjacent floating cylinders 11 being connected by a transverse truss structure 12.

[0056] For example, the three floating cylinders 11 can be arranged in a positive triangle, and the three floating cylinders 11 can be arranged in an isosceles triangle. The triangular structure is stable and reliable, which can improve the reliability of the floating base 1. By connecting two adjacent floating cylinders 11 with the transverse truss structure 12, the material used for the connecting structure between two adjacent floating cylinders 11 can be reduced, thereby reducing the production cost of the floating base 1.

[0057] As in the Fig. 1 and Fig. 2, in some optional embodiments of the present invention, the anchoring rod 22 is connected to one of the transverse truss structures 12. In this way, a larger connection space can be created between the anchoring rod 22 and the floating base 1, which facilitates the arrangement of a ball joint structure, facilitates the arrangement of a slew limiting table, and enables a more expedient spatial arrangement for the assembly of the floating offshore foundation 10.

[0058] As in the Fig. 1 and Fig. 2, in some optional embodiments of the present invention, the floating offshore foundation 10 further comprises a support tube rack 51 and a support table 52, wherein the support table 52 is spaced from the floating base 1 along a longitudinal direction, wherein the support table 52 serves to support the wind turbine 60, wherein the support tube rack 51 extends along the longitudinal direction, wherein the support tube rack 51 is connected between the support table 52 and the floating base 1, wherein the number of support tube racks 51 is the same as the number of floating cylinders 11 and wherein the support tube racks 51 correspond one to one to the floating cylinder 11, wherein three of the support tube racks 51 are connected to the support table 52 at an end remote from the floating cylinders 11.For example, the transverse pivot limiting table 43 may be provided on the support tube frame 51 so that it is spaced from the anchoring rod 22.

[0059] In this way, the floating base 1, the support tube frame 51, and the support table 52 essentially form a Mitsubishi table structure, and the overall structure is stable and reliable. Furthermore, by arranging the support tube frame 51 to connect the support table 52 to the floating base 1, the overall material used for the floating offshore foundation 10 can be reduced, thereby effectively reducing the production cost of the floating offshore foundation 10.

[0060] As in Fig. 4, in some embodiments of the present invention, the projection of the support table 52 on the floating base 1 is located in the extension direction of the anchoring rods 22, which, for example, when setting up the floating offshore foundation 10 in still water, allows the center of gravity of the overall structure of the floating base 1, the support table 52, and the support tube frame 51 to be located in the extension direction of the anchoring rods 22. After the wind turbine 60 is mounted on the support table 52, the projection of the wind turbine 60 is located in the extension direction of the anchoring rods 22, whereby the center of gravity of the overall structure of the wind turbine 60, the floating base 1, the support table 52, and the support tube frame 51 can be located in the extension direction of the anchoring rods 22.

[0061] It should be explained that still water refers to waters without waves, that is, the floating base 1 only rotates relative to the center of the mooring floating cylinder 21, and the floating base 1 does not oscillate in either the transverse or longitudinal direction.

[0062] In the case where the sea current direction is parallel to the mooring rod 22, since the center of gravity of the overall structure of the wind turbine 60, the floating base 1, the support table 52, and the support tube frame 51 is located in the extension direction of the mooring rod 22, a symmetrical center line of the floating base 1 coincides with the center axis of the mooring rod 22, so that the wind turbine 60 can be directly aligned with the sea current direction.

[0063] In the case where the sea wind direction is parallel to the anchoring rod 22, since the center of gravity of the overall structure of the wind turbine 60, the floating base 1, the support table 52, and the support tube frame 51 is located in the extension direction of the anchoring rod 22, a symmetrical center line of the floating base 1 coincides with the center axis of the anchoring rod 22, so that the wind turbine 60 can be directly aligned with the sea wind direction.If the wind turbine 60 is an offshore wind power conversion system, this can make the impeller 61 of the wind turbine 60 always directly aligned with the wind direction of the sea breeze, so that the wind turbine 60 is in the most efficient operating state and the working efficiency of the wind turbine 60 can be improved.

[0064] As in Fig. 4, in some optional embodiments of the present invention, the anchoring rod 22 is connected to one of the transverse truss structures 12, and the projection of the support table 52 on the floating base 1 is located on the transverse truss structure 12 connected to the anchoring rod 22. In particular, the center of the projection of the support table 52 on the floating base 1 may coincide with the center of rotation of the ball joint structure. For example, when the floating offshore foundation 10 is deployed in still water, this allows the plane in which the two support tube racks 51 located adjacent to the ball joint structure are located to be perpendicular to the horizontal plane.When installing the impeller 61, the impeller 61 may face the mooring floating cylinder 21 to avoid interference between the blades of the impeller 61 and the support tube frame 51 and to improve the reliability of the offshore wind power generation system 100.

[0065] As in Fig.1 to 8, according to an embodiment of the second aspect of the present invention, the offshore wind energy generation system 100 comprises a floating offshore foundation 10 according to the embodiment of the first aspect of the present invention and a wind turbine 60 provided on the floating base 1, wherein the wind turbine 60 faces the mooring floating cylinder 21 in the extension direction of the mooring rod 22. For example, the wind turbine 60 may comprise an impeller 61, wherein the impeller 61 is provided on the floating base 1. The wind turbine 60 is provided facing the mooring floating cylinder 21, i.e., in the extension direction of the mooring rod 22, the impeller 61 faces the mooring floating cylinder 21.

[0066] The impeller 61 is provided facing the mooring floating cylinder 21, that is, in the sea wind direction, the impeller 61 is provided on the upstream side of the support tube frame 51, so that the impeller 61 is always kept in a state where it is directly aligned with the sea wind direction, in order to avoid the support tube frame 51 from exerting a disturbing effect on the sea wind, resulting in a reduction in the working efficiency of the wind turbine 60, and to effectively improve the working efficiency of the wind turbine 60.

[0067] According to the offshore wind power generation system 100 of the present invention, the above floating offshore foundation 10 improves the reliability of the floating offshore foundation and the offshore wind power generation system 100 to improve the working efficiency of the offshore wind power generation system 100.

[0068] It should be noted that in the description of the present invention, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another and do not necessarily require or imply that such an actual relationship or order exists between those entities or operations. Further, the terms "including," "comprising," or some other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not expressly listed, or other elements not expressly listed for the purpose of such process, method, article, or apparatus, or even elements inherent in such process, method, article, or apparatus.Without further limitation, the fact that an element is defined by the phrase "including ..." does not preclude the presence of other identical elements in the process, method, article or device in which the element is incorporated.

[0069] In describing the present invention, it is to be understood that the terms, e.g. "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "above", "below", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the attached drawings, are for convenience and to simplify the description of the present invention and do not indicate or imply that the device or element referred to has a particular orientation or must be constructed and operated with a particular orientation and are therefore not to be construed as limiting the present invention.

[0070] Throughout the description, reference to a term such as "one embodiment," "some embodiments," "schematic embodiments," "examples," "specific example," or "some examples" is intended to mean that the specific feature, structure, material, or property described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this description, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or properties may be combined in one or more embodiments or examples as appropriate.

[0071] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that numerous changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and purposes of the present invention, and that the scope of the present invention is limited by the claims and their equivalents.

Claims

[1] Floating offshore foundation, characterized by that it includes: a floating base that is buoyant in seawater and serves to support a wind turbine; a single-point mooring system comprising a mooring buoyancy cylinder and a mooring linkage, the mooring buoyancy cylinder being buoyant in seawater, the mooring linkage being connected between the mooring buoyancy cylinder and the floating base; wherein the anchoring rod is connected to the anchoring floating cylinder by a ball joint structure; and / or wherein the anchoring rod is connected to the floating base by a ball joint structure. [2] Floating offshore foundation according to claim 1, characterized bythat it further comprises a pivot limiting table and a pivot linkage, wherein the pivot linkage comprises a first end and a second end, wherein the first end and the second end are respectively connected to the floating base and the single-point anchoring system; wherein the floating base and / or the single-point anchoring system is provided with the pivot limiting table, wherein the pivot linkage is connected to the pivot limiting table, and preferably wherein the pivot linkage is movably connected to the pivot limiting table. [3] Floating offshore foundation according to claim 2, characterized byin that the pivot limiting table comprises a longitudinal pivot limiting table, wherein the longitudinal pivot limiting table is provided with a first movable bore, wherein the first movable bore extends in an upward and downward direction, wherein the first end is passed through the first movable bore, while the first end is movable in an extension direction of the first movable bore; and / or in that the longitudinal pivot limiting table is provided with a first movable bore, wherein the first movable bore extends in an axial direction of the anchoring rod, wherein the first end is passed through the first movable bore, while the second end is movable in the extension direction of the first movable bore. [4] Floating offshore foundation according to claim 2 or 3, characterized byin that the pivot limiting table comprises a transverse pivot limiting table, wherein the transverse pivot limiting table is provided with a second movable bore, wherein the second movable bore is arc-shaped, wherein a circle center of an extended arc of the second movable bore coincides with a center of rotation of the ball joint structure, wherein the second end is passed through the second movable bore, wherein the second end is movable in the extension direction of the second movable bore. [5] Floating offshore foundation according to one of claims 1 to 4, characterized by that the floating base is provided symmetrically along a central axis of the anchoring rods. [6] Floating offshore foundation according to one of claims 1 to 5, characterized byin that the floating base comprises three floating cylinders, wherein the three floating cylinders are arranged in a triangular row, wherein two adjacent floating cylinders are connected by a transverse truss structure; wherein the anchoring linkage is connected to one of the transverse truss structures; or wherein the anchoring linkage is connected to one of the transverse truss structures. [7] Floating offshore foundation according to claim 6, characterized bythat it further comprises a support tube frame and a support table, wherein the support table is spaced from the floating base along a longitudinal direction and serves to support the wind turbine, wherein the support tube frame extends along the longitudinal direction and is connected between the support table and the floating base, wherein the number of support tube frames is the same as the number of floating cylinders and wherein the support tube frame 51 corresponds one to one to the floating cylinder 11, wherein three of the support tube frames are connected to the support table at an end remote from the floating cylinders. [8] Floating offshore foundation according to claim 7, characterized by that the projection of the support table on the floating base is in the direction of extension of the anchor rods. [9] Floating offshore foundation according to claim 8, characterized bythat the anchoring rod is connected to one of the transverse truss structures, the projection of the support table on the floating base being located on the transverse truss structure connected to the anchoring rod. [10] Offshore wind energy generation system, characterized by that it includes: a floating offshore foundation according to any one of claims 1 to 9; a wind turbine provided on the floating base, wherein the wind turbine faces the mooring floating cylinder in the extension direction of the mooring rod.

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