Offshore floating foundation and offshore wind power generation system

Abstract

The present invention discloses an offshore floating foundation and an offshore wind power generation system. The offshore floating foundation includes a floating base and a single-point mooring system. The floating base can float in the seawater and is used to carry a wind turbine. The single-point mooring system includes a mooring buoy and a mooring connecting rod. The mooring buoy can float in the seawater, and the mooring connecting rod is connected between the mooring buoy and the floating base. The mooring connecting rod is connected to the mooring buoy through a ball joint structure. And / or, the mooring connecting rod is connected to the floating base through a ball joint structure. According to the offshore floating foundation of the present invention, the floating base can be rotated around the center point of the single-point mooring system, so that the floating base can swing longitudinally and transversely around the center point of the ball joint structure, reduce the force generated by the waves on the mooring connecting rod through the floating base, extend the service life of the mooring connecting rod, improve the reliability of the offshore floating foundation, and improve the reliability of the offshore wind power generation system.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore construction engineering, and in particular to an offshore floating foundation and an offshore wind power generation system. Background Art

[0002] As a clean and renewable power generation technology, wind power generation is an important measure for my country to cope with climate change and achieve its dual carbon goals. Offshore wind power is one of the main development directions of the wind power industry, especially in deep sea areas, which has great development potential due to the rich wind energy resources. Floating wind power is a wind power generation technology that meets the development needs of deep sea areas.

[0003] In the related art, a floating wind power system is designed by hingedly connecting a rigid structure to an anchor foundation and fixing the rigid structure to a floating base. However, under the action of waves, the floating base applies a large torque to the rigid structure, and the rigid structure is at risk of breaking, resulting in poor structural reliability. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an offshore floating foundation, which can make the floating base rotate around the center point of the single-point mooring system, and make the floating base swing to a certain extent in the longitudinal and transverse directions, reduce the force exerted by the waves on the mooring connecting rod through the floating base, extend the service life of the mooring connecting rod, improve the reliability of the offshore floating foundation, and improve the reliability of the offshore wind power generation system.

[0005] The present invention also proposes an offshore wind power generation system having the offshore floating foundation.

[0006] According to an embodiment of the first aspect of the present invention, the offshore floating foundation includes: a floating base, which can float in the sea water and is used to carry a wind turbine; a single-point mooring system, including a mooring buoy and a mooring rod, the mooring buoy can float in the sea water, and the mooring rod is connected between the mooring buoy and the floating base; wherein the mooring rod is connected to the mooring buoy through a ball joint structure; and / or the mooring rod is connected to the floating base through a ball joint structure.

[0007] According to the offshore floating foundation of the present invention, by arranging a ball joint structure to connect the mooring rod and the floating base, or by arranging a ball joint structure to connect the mooring rod and the mooring buoy, the floating base can be rotated around the center point of the single-point mooring system, so that the floating base can swing around the center point of the ball joint structure in the longitudinal and transverse directions to a certain extent, thereby reducing the force exerted by waves on the mooring rod through the floating base, extending the service life of the mooring rod, improving the reliability of the offshore floating foundation, and improving the reliability of the offshore wind power generation system.

[0008] According to some embodiments of the present invention, the offshore floating foundation also includes: a sway limiting platform and a sway link, the sway link including a first end and a second end, the first end and the second end being connected to the floating base and the single point mooring system respectively; the sway limiting platform is provided on at least one of the floating base and the single point mooring system, the sway link is connected to the sway limiting platform, and the sway link is movably connected to the sway limiting platform.

[0009] In some embodiments of the present invention, the swing limiting platform includes: a longitudinal swing limiting platform, having a first movable hole on the longitudinal swing limiting platform, the first movable hole extending in the up and down direction, the first end passing through the first movable hole, and the first end being movable along the extension direction of the first movable hole; and / or, the longitudinal swing limiting platform has a first movable hole, the first movable hole extending along the axial direction of the mooring link, the first end passing through the first movable hole, and the second end being movable along the extension direction of the first movable hole.

[0010] In some embodiments of the present invention, the swing limiting platform includes: a lateral swing limiting platform, on which a second movable hole is provided, the second movable hole is arc-shaped, the center of the extended arc of the second movable hole coincides with the rotation center of the ball joint structure, the second end is passed through the second movable hole, and the second end can move along the extension direction of the second movable hole.

[0011] According to some embodiments of the present invention, the floating base is symmetrically arranged along a central axis of the mooring link.

[0012] According to some optional embodiments of the present invention, the floating base includes three floating tubes, which are arranged in a triangle, and two adjacent floating tubes are connected by a transverse truss structure; wherein the mooring rod is connected to one of the transverse truss structures; or, the mooring rod is connected to one of the transverse truss structures.

[0013] In some optional embodiments of the present invention, the offshore floating foundation also includes: a supporting pipe rack and a supporting platform, the supporting platform and the floating base are spaced apart in the longitudinal direction and are used to support the wind turbine, the supporting pipe rack extends longitudinally and is connected between the supporting platform and the floating base, the number of the supporting pipe racks is the same as the floating tubes and corresponds one to one, and the ends of the three supporting pipe racks away from the floating tubes are connected to the supporting platform.

[0014] In some optional embodiments of the present invention, a projection of the support platform on the floating base is located in an extension direction of the mooring link.

[0015] According to some embodiments of the present invention, the mooring link is connected to one of the transverse truss structures, and a projection of the support platform on the floating base is located on the transverse truss structure connected to the mooring link.

[0016] According to an embodiment of the second aspect of the present invention, an offshore wind power generation system comprises: an offshore floating foundation and a wind turbine according to the embodiment of the first aspect of the present invention, wherein the wind turbine is arranged on the floating foundation, and in the extension direction of the mooring link, the wind turbine is arranged toward the mooring buoy.

[0017] According to the offshore wind power generation system of the present invention, the reliability of the offshore floating foundation is improved through the above-mentioned offshore floating foundation, and the reliability of the offshore wind power generation system is improved.

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

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a perspective view of an offshore wind power generation system according to some embodiments of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of a partial structure of an offshore wind power generation system;

[0022] Figure 3 yes Figure 1 A side view of an offshore wind power generation system;

[0023] Figure 4 is along Figure 3 Sectional view along line AA;

[0024] Figure 5 yes Figure 1 The main view of the offshore wind power generation system;

[0025] Figure 6 yes Figure 1 A side view of an offshore wind power generation system in which the floating base is rotated to a maximum angle toward the mooring buoy along the extension direction of the mooring link;

[0026] Figure 7 yes Figure 1 A side view of an offshore wind power generation system in which the floating base is rotated away from the mooring buoy to a maximum angle along the extension direction of the mooring link;

[0027] Figure 8 yes Figure 4 A front view of an offshore wind power generation system in which the floating base is rotated to a maximum angle along the radial direction of the mooring rod.

[0028] Reference numerals:

[0029] 100. Offshore wind power generation system;

[0030] 10. Offshore floating foundation;

[0031] 1. Floating base; 11. Floating cylinder; 12. Transverse truss structure;

[0032] 2. Single point mooring system; 21. Mooring buoy; 22. Mooring connecting rod; 23. Anchor chain;

[0033] 3. Second ball joint structure; 31. Second ball head; 32. Second ball seat;

[0034] 41. longitudinal swing limiting platform; 411. first movable hole; 42. swing connecting rod; 421. first end; 422. second end; 43. transverse swing limiting platform; 431. second movable hole;

[0035] 51. Support pipe rack; 52. Support platform;

[0036] 60. Fan; 61. Impeller. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] The offshore floating foundation 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0039] Reference Figure 1-Figure 8 According to the first embodiment of the present invention, the offshore floating foundation 10 includes: a floating base 1 and a single-point mooring system 2, the floating base 1 can float in the sea water, and the floating base 1 is used to carry the wind turbine 60.

[0040] The single point mooring system 2 includes a mooring buoy 21 and a mooring rod 22. The mooring buoy 21 can float in the seawater. For example, the single point mooring system 2 can also include multiple anchor chains 23. The multiple anchor chains 23 are all connected to the mooring buoy 21 and extend in different directions to fix the mooring buoy 21 relative to the seabed.

[0041] The mooring link 22 is connected between the mooring buoy 21 and the floating base 1; by setting the mooring buoy 21 to connect the floating base 1, refer to Figure 6 and Figure 7 When the direction of the ocean current forms an angle with the extension direction of the mooring link 22, the ocean current can push the floating base 1 to rotate around the center point of the mooring buoy 21 until the direction of the ocean current is parallel to the extension direction of the mooring link 22. In this way, the mooring link 22 can be subjected to force along its axial direction, reducing the shear force received by the mooring link 22 in the radial direction, improving the reliability of the mooring link 22, and extending the service life of the mooring link 22.

[0042] Reference Figure 8 When the wind direction of the sea breeze forms an angle with the extension direction of the mooring link 22, the sea breeze can push the floating base 1 to rotate around the center point of the mooring buoy 21 until the wind direction of the sea breeze is parallel to the extension direction of the mooring link 22. In this way, the mooring link 22 can be subjected to force along its axial direction, reducing the shear force received by the mooring link 22 in the radial direction, improving the reliability of the mooring link 22, and extending the service life of the mooring link 22.

[0043] Moreover, when the offshore floating foundation 10 is installed in the offshore wind power generation system 100, the impeller 61 of the wind turbine 60 can always maintain a direct relationship with the sea breeze, and there is no need to provide an active yaw mechanism for driving the offshore floating foundation 10 to rotate so that the impeller 61 always maintains a direct relationship with the sea breeze, thereby saving the production cost of the offshore floating foundation 10.

[0044] The mooring link 22 is connected to the mooring buoy 21 through a ball joint structure; and / or the mooring link 22 is connected to the floating base 1 through a ball joint structure. For example, one end of the mooring link 22 can be connected to the mooring buoy 21 through a ball joint structure, and the other end of the mooring link 22 is fixedly connected to the floating base 1; one end of the mooring link 22 can be fixedly connected to the mooring buoy 21, and the other end of the mooring link 22 is connected to the floating base 1 through a ball joint structure; both ends of the mooring link 22 can be connected to the mooring buoy 21 and the floating base 1 respectively through a ball joint structure.

[0045] For example, the ball joint structure used to connect the mooring link 22 and the mooring buoy 21 is a first ball joint structure, which may include a first ball head and a first ball seat, the first ball seat having a first spherical groove, the first ball head being rotatably disposed in the first spherical groove, and the first ball head and the first ball seat being respectively connected to the mooring link 22 and the mooring buoy 21.

[0046] In the case of "one end of the mooring link 22 is connected to the mooring buoy 21 through a ball joint structure, and the other end of the mooring link 22 is fixedly connected to the floating base 1", refer to Figure 6 and Figure 7When the wave direction is parallel to the extension direction of the mooring link 22, the floating base 1 can drive the mooring link 22 to rotate around the rotation center of the first ball joint structure toward the mooring buoy 21 under the action of the waves, and the floating base 1 can rotate around the rotation center of the first ball joint structure away from the mooring buoy 21 under the action of the waves, that is, the floating base 1 can swing in the longitudinal direction. In this way, the floating base 1 can absorb the energy of the waves acting on the floating base 1 by rotating relative to the mooring buoy 21 in the extension direction of the mooring link 22, so that the energy transmitted from the floating base 1 to the mooring link 22 is small, and the torsional force exerted by the waves on the mooring link 22 through the floating base 1 can be reduced, so that the mooring link 22 can reliably connect the mooring buoy 21 and the floating base 1, improve the reliability of the mooring link 22, and extend the service life of the mooring link 22.

[0047] In the case of "one end of the mooring link 22 is connected to the mooring buoy 21 through a ball joint structure, and the other end of the mooring link 22 is fixedly connected to the floating base 1", refer to Figure 8 When the wave direction of the sea waves intersects with the extension direction of the mooring link 22, the floating base 1 can drive the mooring link 22 to rotate in the radial direction of the mooring link 22 around the rotation center point of the first ball joint structure under the action of the sea waves, that is, the floating base 1 can swing in the horizontal direction. In this way, the floating base 1 can absorb the energy of the sea waves acting on the floating base 1 by rotating in the radial direction of the mooring link 22, so that the energy transmitted from the floating base 1 to the mooring link 22 is small, and the torsional force exerted by the sea waves on the mooring link 22 through the floating base 1 can be reduced, so that the mooring link 22 can reliably connect the mooring buoy 21 and the floating base 1, improve the reliability of the mooring link 22, and extend the service life of the mooring link 22.

[0048] The ball joint structure is connected to the mooring buoy 21. When the floating base 1 rotates around the rotation center point of the ball joint structure in the extension direction of the mooring link 22, since the mooring link 22 has a certain length, the rotation radius of the floating base 1 can be larger, so that the mooring buoy 21 can play a certain limiting role on the rotation of the floating base 1 through the mooring link 22, so that the rotation angle of the floating base 1 is smaller, so that the floating base 1 can float more stably on the sea surface, and the floating base 1 can reliably and stably support the wind turbine 60, thereby improving the stability of the offshore wind power generation system 100.

[0049] For example, refer to Figure 1 and Figure 2The ball joint structure used to connect the mooring rod 22 and the floating base 1 is a second ball joint structure 3. The second ball joint structure 3 may include a second ball head 31 and a second ball seat 32. The second ball seat 32 has a second spherical groove. The second ball head 31 is rotatably arranged in the second spherical groove. The second ball head 31 and the second ball seat 32 are respectively connected to the mooring rod 22 and the floating base 1.

[0050] In the case of "one end of the mooring link 22 is fixedly connected to the mooring buoy 21, and the other end of the mooring link 22 is connected to the floating base 1 through a ball joint structure", refer to Figure 6 and Figure 7 When the wave direction is parallel to the extension direction of the mooring link 22, the floating base 1 can rotate around the rotation center of the second ball joint structure 3 toward the mooring buoy 21 under the action of the waves, and the floating base 1 can rotate around the rotation center of the second ball joint structure 3 away from the mooring buoy 21 under the action of the waves, that is, the floating base 1 can swing in the longitudinal direction. In this way, the floating base 1 can absorb the energy of the waves on the floating base 1 by rotating relative to the mooring buoy 21 in the extension direction of the mooring link 22, so that the energy transmitted from the floating base 1 to the mooring link 22 is small, and the torsional force exerted by the waves on the mooring link 22 through the floating base 1 can be reduced, so that the mooring link 22 can reliably connect the mooring buoy 21 and the floating base 1, improve the reliability of the mooring link 22, and extend the service life of the mooring link 22.

[0051] The ball joint structure is connected to the floating base 1. When the floating base 1 rotates around the rotation center point of the ball joint structure in the extension direction of the mooring link 22, the rotation radius of the floating base 1 can be smaller, and the floating base 1 can rotate at a larger angle relative to the mooring buoy 21. In this way, the floating base 1 can better absorb the energy of the waves, effectively and reliably reduce the energy transmitted from the floating base 1 to the mooring link 22, and reduce the torsional force applied by the waves on the mooring link 22 through the floating base 1, so that the mooring link 22 can reliably connect the mooring buoy 21 and the floating base 1, thereby improving the reliability of the mooring link 22 and extending the service life of the mooring link 22.

[0052] In the case of "one end of the mooring link 22 is fixedly connected to the mooring buoy 21, and the other end of the mooring link 22 is connected to the floating base 1 through a ball joint structure", refer to Figure 8When the wave direction of the sea waves intersects with the extension direction of the mooring link 22, the floating base 1 can rotate around the rotation center point of the second ball joint structure 3 in the radial direction of the mooring link 22 under the action of the sea waves, that is, the floating base 1 can swing in the lateral direction. In this way, the floating base 1 can absorb the energy of the sea waves acting on the floating base 1 by rotating in the radial direction of the mooring link 22, so that the energy transmitted from the floating base 1 to the mooring link 22 is small, and the torsional force exerted by the sea waves on the mooring link 22 through the floating base 1 can be reduced, so that the mooring link 22 can reliably connect the mooring buoy 21 and the floating base 1, improve the reliability of the mooring link 22, and extend the service life of the mooring link 22.

[0053] In the case where "both ends of the mooring link 22 can be connected to the mooring buoy 21 and the floating base 1 respectively through a ball joint structure", refer to Figure 6 and Figure 7 When the wave direction of the waves is parallel to the extension direction of the mooring link 22, the floating base 1 can first rotate around the rotation center point of the second ball joint structure 3 in the extension direction of the mooring link 22 under the action of the waves, that is, the floating base 1 performs the first stage of rotation. When the floating base 1 rotates to the maximum angle around the rotation center point of the second ball joint structure 3 in the extension direction of the mooring link 22, the floating base 1 can drive the mooring link 22 to rotate around the rotation center point of the first ball joint structure in the radial direction of the mooring link 22, that is, the floating base 1 performs the second stage of rotation, that is, the floating base 1 can perform two stages of swinging in the longitudinal direction.

[0054] In this way, the floating base 1 can have a larger rotation angle in the extension direction of the mooring link 22, so that the floating base 1 can better absorb the energy of the waves acting on the floating base 1 through two stages of rotation, effectively reducing the energy transmitted from the floating base 1 to the mooring link 22, and reducing the torsional force exerted by the waves on the mooring link 22 through the floating base 1; moreover, in this way, the mooring link 22 can form a limiting effect on the floating base 1 during the second stage of rotation, so that the rotation angle of the floating base 1 is not too large, and the stability of the floating base 1 is effectively guaranteed.

[0055] In the case where "both ends of the mooring link 22 can be connected to the mooring buoy 21 and the floating base 1 respectively through a ball joint structure", refer to Figure 8When the wave direction of the sea waves intersects with the extension direction of the mooring link 22, the floating base 1 can rotate in the radial direction of the mooring link 22 around the rotation center point of the second ball joint structure 3 under the action of the sea waves, that is, the floating base 1 can swing in the lateral direction. In this way, the floating base 1 can absorb the energy of the sea waves acting on the floating base 1 by rotating in the radial direction of the mooring link 22, so that the energy transmitted from the floating base 1 to the mooring link 22 is small, and the torsional force exerted by the sea waves on the mooring link 22 through the floating base 1 can be reduced, so that the mooring link 22 can reliably connect the mooring buoy 21 and the floating base 1, improve the reliability of the mooring link 22, and extend the service life of the mooring link 22.

[0056] According to the offshore floating foundation 10 of the present invention, by setting a ball joint structure to connect the mooring link 22 and the floating base 1, or by setting a ball joint structure to connect the mooring link 22 and the mooring buoy 21, the floating base 1 can be rotated around the center point of the single-point mooring system 2, so that the floating base 1 can swing around the center point of the ball joint structure in the longitudinal and transverse directions to a certain extent, thereby reducing the force generated by waves on the mooring link 22 through the floating base 1, extending the service life of the mooring link 22, improving the reliability of the offshore floating foundation 10, and improving the reliability of the offshore wind power generation system 100.

[0057] Reference Figure 1-Figure 8 According to some embodiments of the present invention, the offshore floating foundation 10 further includes: a sway limiting platform and a sway link 42, the sway link 42 includes a first end 421 and a second end 422, the first end 421 and the second end 422 are respectively connected to the floating base 1 and the single point mooring system 2; at least one of the floating base 1 and the single point mooring system 2 is provided with a sway limiting platform, the sway link 42 is connected to the sway limiting platform, and the sway link 42 is movably connected to the sway limiting platform.

[0058] By setting a swing limiting platform and a swing link 42 to connect the floating base 1 and the mooring buoy 21, the swing limiting platform and the swing link 42 cooperate with each other to play a certain limiting role in the rotation of the floating base 1, so that the floating base 1 swings within a preset range, so that the floating base 1 can float more stably on the sea surface, reducing or avoiding the risk of damage to the wind turbine 60 due to a large swing amplitude of the floating base 1, and improving the reliability of the offshore floating foundation 10.

[0059] Reference Figure 1-Figure 3 , Figure 6 , Figure 7In some embodiments of the present invention, the swing limiting platform includes: a longitudinal swing limiting platform 41, the longitudinal swing limiting platform 41 has a first movable hole 411, the first movable hole 411 extends in the up and down direction, the first end 421 is penetrated in the first movable hole 411, and the first end 421 can move along the extension direction of the first movable hole 411; for example, the second end 422 can be rotatably connected to the floating base 1.

[0060] During the rotation of the floating base 1 in the extension direction of the mooring link 22, the sway link 42 can rotate along with the floating base 1 in the extension direction of the mooring link 22, and the first end 421 of the sway link 42 can move in the up-down direction driven by the floating base 1. By setting the first movable hole 411 to extend in the up-down direction, the first movable hole 411 and the first end 421 of the sway link 42 can be well adapted, so that the longitudinal sway limiting platform 41 can limit the rotation angle of the floating base 1 in the extension direction of the mooring link 22 through the limitation formed by the first movable hole 411 on the first end 421 in the up-down direction, and the rotation angle of the floating base 1 in the extension direction of the mooring link 22 is limited within a preset range, and the structure is simple.

[0061] Reference Figure 1-Figure 3 , Figure 6 , Figure 7 In some embodiments of the present invention, the swing limiting platform includes: a longitudinal swing limiting platform 41, the longitudinal swing limiting platform 41 has a first movable hole 411, the first movable hole 411 extends along the axial direction of the mooring link 22, the first end 421 is inserted into the first movable hole 411, and the second end 422 is movable along the extension direction of the first movable hole 411.

[0062] When the longitudinal swing limiting platform 41 is connected to the mooring buoy 21 and the second end 422 is connected to the floating base 1, during the process of the floating base 1 rotating in the extension direction of the mooring link 22, the swing link 42 can rotate along with the floating base 1 in the extension direction of the mooring link 22, and the first end 421 of the swing link 42 can perform a certain movement in the axial direction of the mooring link 22 driven by the floating base 1. For example, the second end 422 can be rotatably connected to the floating base 1.

[0063] When the longitudinal swing limiting platform 41 is connected to the floating base 1 and the second end 422 is connected to the mooring buoy 21, during the process of the floating base 1 rotating in the extension direction of the mooring link 22, the swing link 42 can rotate relative to the floating base 1 in the extension direction of the mooring link 22, and the first end 421 of the swing link 42 can perform a certain movement relative to the floating base 1 in the axial direction of the mooring link 22. For example, the second end 422 can be rotatably connected to the mooring buoy 21.

[0064] By setting the first movable hole 411 to extend along the axial direction of the mooring link 22, the first movable hole 411 can be well adapted to the first end 421 of the swing link 42, so that the longitudinal swing limiting platform 41 can limit the first end 421 in the axial direction of the mooring link 22 through the first movable hole 411, thereby limiting the rotation angle of the floating base 1 in the extension direction of the mooring link 22, and limiting the rotation angle of the floating base 1 in the extension direction of the mooring link 22 within a preset range, with a simple structure.

[0065] Reference Figure 1 , Figure 2 , Figure 5 and Figure 8 In some embodiments of the present invention, the swing limiting platform includes: a lateral swing limiting platform 43, a second movable hole 431 is provided on the lateral swing limiting platform 43, the second movable hole 431 is arc-shaped, the center of the extension arc of the second movable hole 431 coincides with the rotation center of the ball joint structure, the second end 422 is inserted into the second movable hole 431, and the second end 422 can move along the extension direction of the second movable hole 431.

[0066] When the lateral swing limiting platform 43 is arranged on the mooring buoy 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 mooring link 22, the swing link 42 can rotate in the radial direction of the mooring link 22 following the floating base 1, and the second end 422 of the swing link 42 can rotate relative to the ball joint structure in the radial direction of the mooring link 22 under the drive of the floating base 1, that is, the center of the rotation arc of the second end 422 coincides with the rotation center of the ball joint structure.

[0067] When the lateral swing limiting platform 43 is arranged on the floating base 1 and the first end 421 is connected to the mooring buoy 21, during the rotation of the floating base 1 in the radial direction of the mooring link 22, the swing link 42 can rotate relative to the floating base 1 in the radial direction of the mooring link 22, and the second end 422 of the swing link 42 can rotate relative to the floating base 1 in the radial direction of the mooring link 22 relative to the ball joint structure, that is, the center of the rotation arc of the second end 422 relative to the floating base 1 coincides with the rotation center of the ball joint structure.

[0068] By setting the center of the extended arc of the second movable hole 431 to coincide with the rotation center of the ball joint structure, the second movable hole 431 can be well adapted to the second end 422 of the swing link 42, so that the lateral swing limiting platform 43 can limit the second end 422 in the radial direction of the mooring link 22 through the second movable hole 431, thereby limiting the rotation angle of the floating base 1 in the radial direction of the mooring link 22, limiting the rotation angle of the floating base 1 in the radial direction of the mooring link 22 within a preset range, thereby improving the anti-overturning ability of the floating base 1, and having a simple structure.

[0069] Reference Figure 4 According to some embodiments of the present invention, the floating base 1 is symmetrically arranged along the central axis of the mooring link 22. For example, the outer contour of the floating base 1 may be an isosceles triangle or a regular polygon; when the outer contour of the floating base 1 is a regular polygon, the connection point between the mooring link 22 and the floating base 1 may be located at one of the points of the outer contour of the floating base 1, or the connection point between the mooring link 22 and the floating base 1 may also be located at the midpoint of one of the sides of the outer contour of the floating base 1; when the outer contour of the floating base 1 is an isosceles triangle, the connection point between the mooring link 22 and the floating base 1 may be located at the vertex of the outer contour of the floating base 1 opposite to the bottom side, or the connection point between the mooring link 22 and the floating base 1 may also be located at the midpoint of the bottom side of the outer contour of the floating base 1. In this way, the weight of the floating base 1 on both sides of the central axis of the mooring link 22 can be roughly equal, so that the central axis of the mooring link roughly 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 mooring link 22.

[0070] Reference Figure 1-Figure 4 According to some optional embodiments of the present invention, the floating base 1 includes three floating cylinders 11, the three floating cylinders 11 are arranged in a triangle, and two adjacent floating cylinders 11 are connected by a transverse truss structure 12. For example, the three floating cylinders 11 can be arranged in an equilateral triangle, and the three floating cylinders 11 can be arranged in an isosceles triangle. The triangular structure is stable and reliable, and the reliability of the floating base 1 can be improved. By connecting two adjacent floating cylinders 11 through the transverse truss structure 12, the material used in the connection structure between the two adjacent floating cylinders 11 can be reduced, so that the production cost of the floating base 1 is low.

[0071] Reference Figure 1 and Figure 2 In some optional embodiments of the present invention, the mooring link 22 is connected to one of the transverse truss structures 12. This allows a larger connection space between the mooring link 22 and the floating base 1, making it easier to set up a ball joint structure and a swing limiting platform, and the spatial layout is more reasonable, making it easier to assemble the offshore floating foundation 10.

[0072] Reference Figure 1 and Figure 2 In some optional embodiments of the present invention, the offshore floating foundation 10 further includes: a support pipe rack 51 and a support platform 52, the support platform 52 and the floating base 1 are spaced apart in the longitudinal direction, and the support platform 52 is used to support the wind turbine 60, the support pipe rack 51 extends in the longitudinal direction, and the support pipe rack 51 is connected between the support platform 52 and the floating base 1, the number of the support pipe racks 51 is the same as the floating tube 11 and corresponds one to one, and the ends of the three support pipe racks 51 away from the floating tube 11 are all connected to the support platform 52. For example, the lateral swing limiting platform 43 can be arranged on the support pipe rack 51 to be spaced apart from the mooring link 22.

[0073] In this way, the floating base 1, the supporting pipe rack 51 and the supporting platform 52 can roughly form a three-level platform structure, and the overall structure is stable and reliable. In addition, by providing the supporting pipe rack 51 to connect the supporting platform 52 and the floating base 1, the overall material consumption of the offshore floating foundation 10 can be reduced, effectively reducing the production cost of the offshore floating foundation 10.

[0074] Reference Figure 4 In some optional embodiments of the present invention, the projection of the support platform 52 on the floating base 1 is located in the extension direction of the mooring link 22; taking the offshore floating foundation 10 arranged in still water as an example, this allows the center of gravity of the overall structure of the floating base 1, the support platform 52 and the support pipe rack 51 to be located in the extension direction of the mooring link 22; after the wind turbine 60 is installed on the support platform 52, the projection of the wind turbine 60 is located in the extension direction of the mooring link 22, this allows the center of gravity of the overall structure of the wind turbine 60, the floating base 1, the support platform 52 and the support pipe rack 51 to be located in the extension direction of the mooring link 22.

[0075] It should be explained that calm water refers to waters without waves, that is, the floating base 1 only rotates relative to the center point of the mooring buoy 21, and the floating base 1 does not swing in the horizontal and vertical directions.

[0076] When the flow direction of the ocean current is parallel to the mooring link 22, since the center of gravity of the overall structure of the floating base 1, the support platform 52 and the supporting pipe rack 51 is located in the extension direction of the mooring link 22, the center of gravity of the overall structure of the wind turbine 60, the floating base 1, the support platform 52 and the supporting pipe rack 51 is located in the extension direction of the mooring link 22, the symmetry center line of the floating base 1 can be coincident with the central axis of the mooring link 22, so that the wind turbine 60 can maintain a facing state with the flow direction of the ocean current.

[0077] When the wind direction of the sea breeze is parallel to the mooring link 22, since the center of gravity of the overall structure of the floating base 1, the support platform 52 and the support pipe rack 51 is located in the extension direction of the mooring link 22, the center of gravity of the overall structure of the wind turbine 60, the floating base 1, the support platform 52 and the support pipe rack 51 is located in the extension direction of the mooring link 22, the symmetry center line of the floating base 1 can coincide with the central axis of the mooring link 22, so that the wind turbine 60 can be kept facing the wind direction of the sea breeze. When the wind turbine 60 is an offshore wind power conversion system, this can keep the impeller 61 of the wind turbine 60 facing the wind direction of the sea breeze, so that the wind turbine 60 can be in the most efficient working state, improving the working efficiency of the wind turbine 60.

[0078] Reference Figure 4 In some optional embodiments of the present invention, the mooring link 22 is connected to one of the transverse truss structures 12, and the projection of the support platform 52 on the floating base 1 is located on the transverse truss structure 12 connected to the mooring link 22. Specifically, the projection center point of the support platform 52 on the floating base 1 can coincide with the rotation center point of the ball joint structure. Taking the offshore floating foundation 10 set in still water as an example, the plane where the two support pipe racks 51 adjacent to the ball joint structure are located can be perpendicular to the horizontal plane. When installing the impeller 61, the impeller 61 can be set toward the mooring buoy 21 to avoid interference between the blades of the impeller 61 and the support pipe rack 51, thereby improving the reliability of the offshore wind power generation system 100.

[0079] Reference Figure 1-Figure 8 The offshore wind power generation system 100 according to the second embodiment of the present invention comprises: an offshore floating foundation 10 according to the first embodiment of the present invention and a wind turbine 60, wherein the wind turbine 60 is arranged on a floating base 1, and the wind turbine 60 is arranged toward the mooring buoy 21 in the extension direction of the mooring link 22. For example, the wind turbine 60 may include an impeller 61, and the impeller 61 is arranged on the floating base 1. The wind turbine 60 is arranged toward the mooring buoy 21, that is, the impeller 61 is arranged toward the mooring buoy 21 in the extension direction of the mooring link 22.

[0080] The impeller 61 is arranged toward the mooring buoy 21, that is, in the wind direction of the sea breeze, the impeller 61 is arranged on the upstream side of the support pipe rack 51, so that the impeller 61 can always maintain a good facing state with the wind direction of the sea breeze, avoiding the support pipe rack 51 from causing turbulence to the sea breeze and causing the working efficiency of the fan 60 to decrease, thereby effectively improving the working efficiency of the fan 60.

[0081] According to the offshore wind power generation system 100 of the present invention, the reliability of the offshore floating foundation 10 is improved through the above-mentioned offshore floating foundation 10, the reliability of the offshore wind power generation system 100 is improved, and the working efficiency of the offshore wind power generation system 100 is improved.

[0082] In the description of the present invention, it is to be understood that relational terms such as "first" and "second" are used only 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 terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0083] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An offshore floating foundation, characterized in that: include: A floating base that can float in the seawater and is used to carry the wind turbine; A single-point mooring system, comprising a mooring buoy and a mooring connecting rod, wherein the mooring buoy can float in the sea water, and the mooring connecting rod is connected between the mooring buoy and the floating base; Wherein, the mooring connecting rod is connected to the mooring buoy via a ball joint structure; and / or, the mooring connecting rod is connected to the floating base via a ball joint structure; The offshore floating foundation further comprises: a sway limiting platform and a sway link, the sway link comprising a first end and a second end, the first end and the second end are respectively connected to the floating base and the single point mooring system; The sway limiting platform is provided on at least one of the floating base and the single point mooring system, the sway link is connected to the sway limiting platform, and the sway link is movably connected to the sway limiting platform.

2. The offshore floating foundation according to claim 1, characterized in that: The swing limiting platform comprises: a longitudinal swing limiting platform, the longitudinal swing limiting platform has a first movable hole, the first movable hole extends in the up-down direction, the first end is inserted into the first movable hole, and the first end can move along the extension direction of the first movable hole; And / or, the longitudinal swing limiting platform has a first movable hole, the first movable hole extends along the axial direction of the mooring link, the first end is inserted into the first movable hole, and the second end is movable along the extension direction of the first movable hole.

3. The offshore floating foundation according to claim 1, characterized in that: The swing limiting platform includes: a lateral swing limiting platform, a second movable hole is provided on the lateral swing limiting platform, the second movable hole is arc-shaped, the center of the extended arc of the second movable hole coincides with the rotation center of the ball joint structure, the second end is inserted into the second movable hole, and the second end can move along the extension direction of the second movable hole.

4. The offshore floating foundation according to claim 1, characterized in that: The floating base is symmetrically arranged along the central axis of the mooring rod.

5. The offshore floating foundation according to any one of claims 1 to 4, characterized in that: The floating base includes three floating cylinders, which are arranged in a triangle, and two adjacent floating cylinders are connected by a transverse truss structure; Wherein, the mooring link is connected to one of the transverse truss structures; or, the mooring link is connected to one of the transverse truss structures.

6. The offshore floating foundation according to claim 5, characterized in that: Also includes: A support pipe rack and a support platform, wherein the support platform and the floating base are spaced apart in the longitudinal direction and are used to support the wind turbine, the support pipe rack extends longitudinally and is connected between the support platform and the floating base, the number of the support pipe racks is the same as the floating tube and corresponds one to one, and the ends of the three support pipe racks away from the floating tube are connected to the support platform.

7. The offshore floating foundation according to claim 6, characterized in that: The projection of the support platform on the floating base is located in the extension direction of the mooring link.

8. The offshore floating foundation according to claim 7, characterized in that: The mooring link is connected to one of the transverse truss structures, and the projection of the support platform on the floating base is located on the transverse truss structure connected to the mooring link.

9. An offshore wind power generation system, characterized in that: include: The offshore floating foundation according to any one of claims 1 to 8; A wind turbine is arranged on the floating base, and in the extension direction of the mooring connecting rod, the wind turbine is arranged toward the mooring buoy.

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