Wind power floating foundation with double-stand-column structure

Abstract

The invention provides a wind power floating foundation of a double-stand-column structure. The wind power floating foundation comprises a first stand column, a second stand column, a stand column connecting piece and a plurality of mooring chains. The mooring chains are connected to the bottom of the second stand column so that the second stand column can float in a designated sea area. The first stand column and the second stand column are arranged in parallel at intervals, the first end of the stand column connecting piece is connected to the circumferential side wall of the first stand column, the second end of the stand column connecting piece is rotationally connected to the second stand column, and the first stand column can rotate around the circumferential direction of the second stand column through the stand column connecting piece. The stand column connecting piece is located above the sea level. The fan tower drum is arranged on the top of the first stand column in the buoyancy direction. The problems that in the prior art, the anti-torque capacity is poor, the structure is complex, and cost is high are solved.

Description

Technical Field

[0001] The invention relates to the field of offshore wind power generation, and in particular to a wind power floating foundation with a double-column configuration. Background Art

[0002] Existing offshore floating wind turbine platforms mainly include three-column types with multi-point mooring and single-point mooring types. Due to the characteristics of multi-point mooring, the wind turbine platform needs to face the effects of wave and current loads and is subject to large environmental loads, which will pose challenges to structural safety and cost control. Therefore, the single-point mooring type is preferred under actual working conditions.

[0003] However, the single-point mooring structure in the prior art will be subjected to a large torque when the wind and wave loads are out of direction, which may easily have an adverse effect on the normal operation of the wind turbine. In addition, many single-point mooring structures are directly converted from existing three-column wind turbines, which are complex in structure, expensive and inconvenient to maintain.

[0004] It can be seen that the single-point mooring structure in the prior art has the defects of poor torque resistance, complex structure and high cost. Summary of the invention

[0005] The present invention provides a wind power floating foundation with a double-column configuration, which solves the problems of poor torque resistance, complex structure and high cost in the prior art.

[0006] The invention provides a wind power floating foundation with a double-column configuration, comprising a first column, a second column, a column connector and a plurality of mooring chains.

[0007] A plurality of mooring chains are connected to the bottom of the second column so that the second column floats in the designated sea area. The first column and the second column are arranged in parallel and spaced apart, the first end of the column connector is connected to the circumferential side wall of the first column, and the second end of the column connector is rotatably connected to the second column so that: the first column can rotate around the circumference of the second column through the column connector. The column connector is located above sea level;

[0008] The wind turbine tower is arranged at the top of the first column along the buoyancy direction.

[0009] The wind power floating foundation of the double-column configuration of the present invention, because the first column can rotate around the circumference of the second column, therefore, when the wind and wave current loads are in different directions, the relative movement between the first column and the second column can be used to reduce the torque on the bearing platform (or can be understood as the first column), thereby improving the anti-interference ability of the floating foundation, and having high stability and safety. In addition, the wind power floating foundation of the double-column configuration of the present invention, because it is at least partially located above the sea level, can provide a higher hydrostatic restoring torque, further improving the anti-interference ability of the floating foundation. Furthermore, the present invention adopts a double-column structure, which, compared with the traditional three-column or four-column configuration, reduces the use of construction materials on the one hand, and has a low cost. On the other hand, the wet surface area of ​​the bearing platform of the double-column configuration is smaller, so under the same sea conditions, it is subjected to less wave current load, which helps to further improve the stability and safety of the floating foundation.

[0010] Optionally, the wind power floating foundation with a double-column configuration further includes a connecting bearing, the interior of the second column is hollow, the connecting bearing is arranged in the second column, and the second end of the column connector is installed on the connecting bearing to be rotatably connected to the second column.

[0011] Optionally, the column connecting member includes a horizontal connecting section and a bent connecting section.

[0012] The first end of the horizontal connecting section is connected to the circumferential side wall of the first column, the second end of the horizontal connecting section is connected to the first end of the bending connecting section, and the second end of the bending connecting section is connected to the second column, wherein the cross-sectional diameter of the bending connecting section is smaller than the cross-sectional diameter of the second column.

[0013] The embodiment of the present invention utilizes the horizontal connection section and the bent connection section of the column connecting member to connect the first column and the second column at a single point, which can effectively reduce the hydrodynamic load. In addition, while ensuring that the column connecting member is located above the sea level, the structure takes into account the relative movement relationship between the first column and the second column. The structure is simple and easy to maintain.

[0014] Optionally, the cross-sectional shape of the bent connecting section is circular.

[0015] Optionally, the wind power floating foundation with a double-column configuration further includes a first floating body, a second floating body, a first connecting member and a second connecting member.

[0016] The first end of the first connecting member is connected to the circumferential side wall of the first column, the second end of the first connecting member is rotatably connected to the first floating body, the first end of the second connecting member is connected to the circumferential side wall of the first column, and the second end of the second connecting member is rotatably connected to the second floating body, so that: the first floating body and the second floating body can rotate around their own axes driven by external force.

[0017] The wind turbine floating foundation with a double-column configuration in the embodiment of the present invention can enable the first column where the wind turbine is located to rotate around the second column, fully utilizing the weather vane effect of the single-point mooring, reducing the environmental load on the wind turbine platform, and at the same time effectively reducing the number of yaws and improving the stability of wind turbine power generation. In extreme environments, for example, when the wind turbine platform is subjected to lateral external loads and the first column is rotated to the longitudinal forward direction, the first buoy and the second buoy can provide it with a restoring torque to ensure the stability of the wind turbine platform.

[0018] Optionally, along the extension direction of the column connecting member, the first floating body and the second floating body are symmetrically distributed on both sides of the column connecting member.

[0019] Optionally, the shortest line between the axis of the first floating body and the axis of the first column is the first line, the shortest line between the axis of the second floating body and the axis of the first column is the second line, and the angle between the first line and the second line toward the second column is angle A, 90°≤angle A≤180°.

[0020] The embodiment of the present invention can ensure, through such a structure, that in extreme environments, for example, when the first column rotates to the longitudinal forward direction, the first buoy and the second buoy provide a larger restoring torque, which is beneficial to improving the stability and safety of the floating foundation in extreme environments.

[0021] Optionally, the cross-sectional shapes of the first floating body and the second floating body are any one of the following: rectangular, diamond, elliptical, teardrop-shaped, and streamlined.

[0022] Optionally, the first connecting member and the second connecting member are both L-shaped.

[0023] Optionally, a plurality of mooring chains are radially distributed at the bottom of the second column. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of a wind power floating foundation with a double-column configuration according to an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a wind power floating foundation with a double-column configuration according to an embodiment of the present invention;

[0026] Figure 3 It is a partial side cross-sectional structural schematic diagram of a wind power floating foundation with a double-column configuration according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the angle A of the wind turbine floating foundation of the double-column configuration according to an embodiment of the present invention;

[0028] Figure 5 The side view of the wind power floating foundation with double columns in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 6 The side view of the wind power floating foundation with double columns in the embodiment of the present invention is shown in FIG. Figure 2 .

[0030] Description of reference numerals:

[0031] 1: Wind power floating foundation with double column configuration;

[0032] 11: first column; 12: second column; 13: column connecting piece; 131: horizontal connecting section; 132: bending connecting section; 133: transition section; 134: vertical section; 135: connecting bearing;

[0033] 141: first floating body; 142: second floating body; 143: first connecting member; 144: second connecting member; L1: first connecting line; L2: second connecting line;

[0034] 15: Mooring chain;

[0035] 2: Wind turbine tower. DETAILED DESCRIPTION

[0036] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0037] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0038] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0040] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0041] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] See also Figure 1 to Figure 6 The present invention provides a wind power floating foundation 1 with a double-column configuration, including a first column 11, a second column 12, a column connector 13 and a plurality of mooring chains 15.

[0043] A plurality of mooring chains 15 are connected to the bottom of the second column 12 so that the second column 12 floats in a designated sea area. The first column 11 and the second column 12 are arranged in parallel and spaced apart, the first end of the column connector 13 is connected to the circumferential side wall of the first column 11, and the second end of the column connector 13 is rotatably connected to the second column 12, and the first column 11 can rotate around the circumference of the second column 12 through the column connector 13. The column connector 13 is located above the sea level.

[0044] The wind turbine tower 2 is arranged at the top of the first column 11 along the buoyancy direction (for example Figure 1 The upper surface of the first column 11 shown).

[0045] The wind power floating foundation 1 of the double-column configuration of the present invention, since the first column 11 can rotate around the circumference of the second column 12, therefore, when the wind and wave current loads are in different directions, the relative movement between the first column 11 and the second column 12 can be used to reduce the torque on the bearing platform (or can be understood as the first column 11), thereby improving the anti-interference ability of the floating foundation, and having higher stability and safety, or it can be understood as: since the wind power floating foundation 1 of the double-column configuration of the present invention can make the first column 11 where the wind turbine is located rotate around the second column 12, the weather vane effect of the single-point mooring is fully utilized to reduce the environmental load on the wind turbine platform, thereby effectively reducing the number of yaws and improving the stability of wind turbine power generation. In addition, the wind power floating foundation 1 of the double-column configuration of the present invention, since it is at least partially located above the sea level, can provide a higher hydrostatic restoring torque, further improving the anti-interference ability of the floating foundation. Furthermore, the present invention adopts a double-column structure. Compared with the traditional three-column or four-column configuration, on the one hand, it reduces the use of construction materials and has a low cost. On the other hand, the double-column configuration has a smaller wet surface area of ​​the supporting platform. Therefore, under the same sea conditions, it is subject to smaller wave and current loads, which helps to further improve the stability and safety of the floating foundation.

[0046] Those skilled in the art will appreciate that the weathervane effect refers to an object adjusting its direction by rotating or swinging under the action of wind so that its head is directed toward the source of the wind.

[0047] Wave loads, also called hydrodynamic loads or wave loads, are the effects of waves on structures in the ocean. Wave loads are caused by the relative motion between wave water particles and the structure.

[0048] The present invention has no limitation on the rotational connection method between the column connector 13 and the second column 12. In one embodiment, Figure 2 and Figure 3 As shown, the turret connection can be realized by a bearing connection method. Specifically, the wind power floating foundation 1 with a double-column configuration further includes a connection bearing 135. The interior of the second column 12 is hollow. The connection bearing 135 is arranged in the second column 12. The second end of the column connector 13 is installed on the connection bearing 135 to be rotatably connected to the second column 12. In other alternative implementations, other rotational connection methods can also be used. As long as the connection method can enable the first column 11 to rotate around the circumference of the second column 12 through the column connector 13, it does not depart from the scope of the embodiment of the present invention.

[0049] Furthermore, the present invention does not limit the shapes of the first column 11, the second column 12, and the column connector 13. For example, the first column 11 and the second column 12 may be cylindrical, rectangular, etc. The column connector 13 may be, for example, arched, L-shaped, U-shaped, etc. In one embodiment, the column connector 13 includes a horizontal connecting section 131 and a bent connecting section 132.

[0050] The first end of the horizontal connecting section 131 is connected to the circumferential side wall of the first column 11, the second end of the horizontal connecting section 131 is connected to the first end of the bent connecting section 132, and the second end of the bent connecting section 132 is connected to the second column 12, for example, in the connecting bearing 135 of the second column 12 (such as Figure 3 As shown), the cross-sectional diameter of the bent connecting section 132 is smaller than the cross-sectional diameter of the second column 12. The bent connecting section 132 may be a right-angle bend or an arc bend, which is not limited in the present invention. In one embodiment, Figure 5 and Figure 6 As shown, the bent connecting section 132 is an arc-shaped bend, including a transition section 133 and a vertical section 134, wherein the transition section 133 is connected between the horizontal connecting section 131 and the vertical section 134, one end of the vertical section 134 is connected to the transition section 133, and the other end is rotatably installed in the second column 12, for example, installed in a connecting bearing 135 in the second column 12.

[0051] In one embodiment, the cross-sectional shapes of the horizontal connecting section 131 and the bent connecting section 132 are both circular. In other alternative embodiments, the horizontal connecting section 131 and the bent connecting section 132 may also be other shapes, such as rectangular, elliptical, etc. The cross-sectional shape of the horizontal connecting section 131 and the cross-sectional shape of the bent connecting section 132 may be the same or different.

[0052] The embodiment of the present invention utilizes the horizontal connection section 131 and the bent connection section 132 of the column connector 13 to single-point connect the first column 11 and the second column 12, which can effectively reduce the hydrodynamic load. In addition, while ensuring that the column connector 13 is located above the sea level, the structure takes into account the relative movement relationship between the first column 11 and the second column 12, and has a simple structure and is easy to maintain.

[0053] For further information, see Figure 1 , and combined with Figure 5 and Figure 6 It is understood that, in one embodiment, the wind power floating foundation 1 with a double-column configuration further includes a first floating body 141 , a second floating body 142 , a first connecting member 143 and a second connecting member 144 .

[0054] The first end of the first connecting member 143 is connected to the circumferential side wall of the first column 11, the second end of the first connecting member 143 is rotatably connected to the first floating body 141, the first end of the second connecting member 144 is connected to the circumferential side wall of the first column 11, and the second end of the second connecting member 144 is rotatably connected to the second floating body 142, so that: the first floating body 141 and the second floating body 142 can rotate around their own axes under the drive of external force. The rotational connection structure of the first floating body 141 and the first connecting member 143 and the rotational connection structure of the second floating body 142 and the second connecting member 144 are not limited, and they can be similar to the connection method of the column connecting member 13 and the second column 12, or other rotational connection structures can be used.

[0055] The wind turbine floating foundation 1 of the double-column configuration of the embodiment of the present invention can make the first column 11 where the wind turbine is located rotate around the second column 12, make full use of the weather vane effect of the single-point mooring, reduce the environmental load on the wind turbine platform, lock the minimum load, and make the load adjustment process very convenient. At the same time, it can effectively reduce the number of yaw times, and only the wind turbine pitch change is required, thereby improving the stability of wind turbine power generation. On this basis, the first buoy 141 and the second buoy 142 are arranged, so that the floating foundation can be in an extreme environment, for example, when the wind turbine platform is subjected to a lateral external load, when the first column 11 is rotated to the longitudinal front direction, the first buoy 141 and the second buoy 142 can provide it with a restoring torque to ensure the stability of the wind turbine platform.

[0056] The positions of the first floating body 141 and the second floating body 142 are not limited, as long as they are arranged on the circumferential outer side of the first column 11 through the first connecting member 143 and the second connecting member 144, it does not deviate from the scope of the embodiment of the present invention. In one embodiment, along the extension direction of the column connecting member 13, the first floating body 141 and the second floating body 142 are symmetrically distributed on both sides of the column connecting member 13. In a further embodiment, as Figure 4 As shown, the shortest connection line between the axis of the first floating body 141 and the axis of the first column 11 is the first connection line L1, the shortest connection between the axis of the second floating body 142 and the axis of the first column 11 is the second connection line L2, the angle between the first connection line L1 and the second connection line L2 toward the second column 12 is the angle A, 90°≤angle A≤180°. Such a structure can make the restoring torque provided by the first floating body 141 and the second floating body 142 larger in extreme environments, for example, when the first column 11 rotates to the longitudinal front direction, which is conducive to improving the stability and safety of the floating foundation in extreme environments.

[0057] In one embodiment, the angle A is 180°. Such a structure can also be understood as the first floating body 141 and the second floating body 142 are arranged opposite to each other and correspondingly, and the line between the two is perpendicular to the extension direction of the column connector 13. Such a structure can ensure that in extreme environments, such as when the first column 11 rotates to the longitudinal front direction, the first floating body 141 and the second floating body 142 provide the maximum restoring torque, and the stability and safety are optimal.

[0058] Those skilled in the art will appreciate that the cross-sectional shapes of the first buoy 141 and the second buoy 142 may be rectangular, rhombus, elliptical, teardrop-shaped or streamlined, and the present invention is not limited thereto. Further, the shapes of the first connector 143 and the second connector 144 may be, for example, L-shaped, U-shaped, arc-shaped, arch-shaped, etc.

[0059] In one embodiment, a plurality of mooring chains 15 are radially distributed at the bottom of the second column 12. The number of the mooring chains 15 is not limited, for example, it can be 3, 5, 7 or other numbers.

[0060] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A wind power floating foundation with a double-column configuration, characterized in that: It includes a first column, a second column, a column connecting member and a plurality of mooring chains; The plurality of mooring chains are connected to the bottom of the second column so that the second column floats in a designated sea area; the first column and the second column are arranged in parallel and spaced apart, the first end of the column connector is connected to the circumferential side wall of the first column, and the second end of the column connector is rotatably connected to the second column so that: the first column can rotate around the circumference of the second column through the column connector; wherein the column connector is located above sea level; The wind turbine tower is arranged at the top of the first column along the buoyancy direction.

2. The wind power floating foundation with double column configuration according to claim 1 is characterized in that: It also includes a connecting bearing. The interior of the second column is hollow. The connecting bearing is arranged in the second column. The second end of the column connecting member is installed on the connecting bearing to be rotatably connected to the second column.

3. The wind power floating foundation with double column configuration according to claim 2 is characterized in that: The column connecting piece includes a horizontal connecting section and a bent connecting section; The first end of the horizontal connecting section is connected to the circumferential side wall of the first column, the second end of the horizontal connecting section is connected to the first end of the bending connecting section, and the second end of the bending connecting section is connected to the second column, wherein the cross-sectional diameter of the bending connecting section is smaller than the cross-sectional diameter of the second column.

4. The wind power floating foundation with double column configuration according to claim 3 is characterized in that: The cross-section of the bent connecting section is circular.

5. The wind power floating foundation with double column configuration according to claim 1, characterized in that: Also includes a first floating body, a second floating body, a first connecting member and a second connecting member; The first end of the first connecting member is connected to the circumferential side wall of the first column, the second end of the first connecting member is rotatably connected to the first floating body, the first end of the second connecting member is connected to the circumferential side wall of the first column, and the second end of the second connecting member is rotatably connected to the second floating body, so that: the first floating body and the second floating body can rotate around their own axes driven by external force.

6. The wind power floating foundation with double column configuration according to claim 5, characterized in that: Along the extension direction of the column connecting member, the first floating body and the second floating body are symmetrically distributed on both sides of the column connecting member.

7. The wind power floating foundation with double column configuration according to claim 5, characterized in that: The shortest connecting line between the axis of the first floating body and the axis of the first column is the first connecting line, the shortest connecting line between the axis of the second floating body and the axis of the first column is the second connecting line, and the angle between the first connecting line and the second connecting line toward the second column is angle A, 90°≤angle A≤180°.

8. The wind power floating foundation with double column configuration according to claim 5, characterized in that: The cross-sectional shapes of the first floating body and the second floating body are any one of the following: rectangular, diamond, elliptical, teardrop-shaped, and streamlined.

9. The wind power floating foundation with double column configuration according to claim 5, characterized in that: The first connecting member and the second connecting member are both L-shaped.

10. The wind power floating foundation with double column configuration according to claim 1, characterized in that: The plurality of mooring chains are radially distributed at the bottom of the second column.

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