Multi-machine-head floating type offshore wind generating set

Abstract

The invention discloses a multi-machine-head floating type offshore wind generating set which comprises a floating foundation, a tower drum, machine heads and mooring assemblies, the floating foundation comprises a support, a rotating bearing platform and a driving device, and the rotating bearing platform is pivotally connected with the support around the central axis of the rotating bearing platform; the driving device is installed on the support and is in transmission connection with the rotary bearing platform, the tower barrels are discretely installed on the rotary bearing platform, the machine heads correspond to the tower barrels in a one-to-one mode, the machine heads are installed at the upper ends of the corresponding tower barrels, the axial directions of all the machine heads are consistent, the mooring assembly comprises mooring cables and mooring foundations, and the mooring cables are connected with the floating foundations and the mooring foundations. The mooring foundation is suitable for being fixed to the seabed. The multi-machine-head floating type offshore wind generating set has the advantages that the utilization rate of wind energy resources is high, and the power generation efficiency of the fan is high.

Description

Technical Field

[0001] The invention relates to the technical field of offshore discharge, and in particular to a multi-head floating offshore wind turbine generator set. Background Art

[0002] The global demand for clean energy is increasing, and wind energy, as a renewable and clean energy source, has been widely used. At present, my country's offshore wind farms are mainly arranged in offshore waters, but the wind energy resources in the deep sea are more abundant than those in the offshore area, with reserves of about 1 billion kilowatts, equivalent to twice the offshore resources, showing huge development potential. With the gradual advancement of offshore wind power development, the development area is bound to expand from the offshore to the deep sea. However, whether it is a fixed foundation or a floating wind turbine, the direction of the wind turbine is fixed, but due to the complex and changeable environment of the sea surface (especially the deep sea), the wind turbine cannot always face the wind direction, which leads to low utilization of wind energy resources and low wind turbine power generation efficiency. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a multi-engine floating offshore wind turbine generator set, which has the advantages of high utilization rate of wind energy resources and high wind turbine power generation efficiency.

[0005] The multi-head floating offshore wind turbine generator set of an embodiment of the present invention includes a floating foundation, a tower, a head and a mooring assembly, wherein the floating foundation includes a support, a rotating platform and a driving device, wherein the rotating platform is pivotally connected to the support around its central axis, and the driving device is installed on the support and is transmission-connected to the rotating platform; the tower has multiple heads and is discretely installed on the rotating platform; the heads correspond to the towers one by one, and the heads are installed at the corresponding upper ends of the towers, and the axial directions of all the heads are consistent; the mooring assembly includes a mooring cable and a mooring foundation, wherein the mooring cable connects the floating foundation and the mooring foundation, and the mooring foundation is suitable for being fixed on the seabed.

[0006] According to the multi-head floating offshore wind turbine generator set of the embodiment of the present invention, the floating foundation and the tower and head thereon float on the sea surface and are fixed to the set area on the seabed through mooring cables and mooring foundations, wherein the driving device installed on the support can drive the rotating support to drive the rotating support and the tower and head thereon to rotate, so that the axial direction of the head can always be consistent with the wind direction, thereby bearing greater wind force, so as to better utilize wind energy resources, and the power generation efficiency of multiple heads is higher. Moreover, multiple heads share a floating foundation, and the operation and maintenance cost of the multi-head floating offshore wind turbine generator set is low.

[0007] In some embodiments, there are three heads, including a first head and two second heads respectively. The two second heads are arranged in mirror symmetry with respect to the vertical plane where the axis of the first head is located, and the orientation of the first head is opposite to that of the second head.

[0008] In some embodiments, the tower includes a first tower connected to the first head and a second tower connected to the second head, the extension direction of each of the first tower and the second tower is angled with the axial direction of the rotating platform, and the distance between the central axis of each of the first tower and the second tower and the central axis of the rotating platform gradually increases from bottom to top.

[0009] In some embodiments, the multi-head floating offshore wind turbine generator set also includes three first cross braces, the first cross braces are located above the rotating platform, the first cross braces are connected between the first tower and any second tower, and the first cross braces are connected between two second towers.

[0010] In some embodiments, the multi-head floating offshore wind turbine generator set also includes a cable, and the upper end of the first tower is connected to the center positions of two second towers respectively through two of the cables, and the upper end of any second tower is connected to the center position of the first tower and the center position of another second tower respectively through two of the cables.

[0011] In some embodiments, the length and diameter of the first tower are greater than the length and diameter of the second tower, and the size of the first head is greater than the size of the second head.

[0012] In some embodiments, the floating foundation also includes a first float, a second float and a second cross brace, the first float is installed below the support; there are multiple second floats and they are arranged around the first float along the circumference of the first float; any second float is connected to the first float through the second cross brace.

[0013] In some embodiments, the floating foundation includes a third cross brace, which is located above the second cross brace and corresponds one to one, and any second floating body is connected to the support through the third cross brace.

[0014] In some embodiments, the floating foundation further includes a heave plate, and the lower ends of any two adjacent second buoys are connected via the heave plate.

[0015] In some embodiments, the mooring cable includes a plurality of anchor chains, each of the second buoys is connected to the upper ends of at least two of the anchor chains, and on a projection plane perpendicular to the axial direction of the rotating platform, the projection of the lower end of the anchor chain is located on a side of the projection of the upper end of the anchor chain that is away from the projection of the first buoy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a multi-head floating offshore wind turbine generator set according to an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the multi-head floating offshore wind turbine generator set except for the floating foundation according to an embodiment of the present invention.

[0018] Figure 3 It is another schematic diagram of the parts of a multi-head floating offshore wind turbine generator set except for the floating foundation according to an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of a floating foundation and anchor chains in a multi-head floating offshore wind turbine generator set according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] 1. Floating foundation; 11. Support; 12. Rotating platform; 13. First floating body; 14. Second floating body; 15. Second cross brace; 16. Third cross brace; 17. Heave plate; 2. First tower; 3. Second tower; 4. First machine head; 5. Second machine head; 6. First cross brace; 7. Cable; 8. Anchor chain. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0023] Combine the following Figure 1-Figure 4 A multi-head floating offshore wind turbine generator system according to an embodiment of the present invention is described.

[0024] The multi-head floating offshore wind turbine generator set of the embodiment of the present invention comprises a floating foundation 1, a tower, a head and a mooring assembly. The floating foundation 1 comprises a support 11, a rotating platform 12 and a driving device, the rotating platform 12 is pivotally connected to the support 11 around its central axis, and the driving device is installed on the support 11 and is transmission-connected to the rotating platform 12. There are multiple towers and they are discretely installed on the rotating platform 12. The heads correspond to the towers one by one, and the heads are installed at the upper ends of the corresponding towers, and the axial directions of all heads are consistent. The mooring assembly comprises a mooring cable and a mooring foundation, the mooring cable connects the floating foundation 1 and the mooring foundation, and the mooring foundation is suitable for being fixed on the seabed.

[0025] According to the multi-head floating offshore wind turbine generator set of the embodiment of the present invention, the floating foundation 1 and the tower and head thereon float on the sea surface and are fixed to the set area on the seabed through mooring cables and mooring foundations, wherein the driving device installed on the support 11 can drive the rotating support 12 to drive the rotating support 12 and the tower and head thereon to rotate, so that the axial direction of the head can always be consistent with the wind direction, thereby bearing greater wind force, so as to better utilize wind energy resources, and the power generation efficiency of multiple heads is higher. Moreover, multiple heads share one floating foundation 1, and the operation and maintenance cost of the multi-head floating offshore wind turbine generator set is low.

[0026] It should be noted that an assembly hole is provided on the upper surface of the support 11, and the rotating platform 12 is rotatably fitted in the assembly hole. The driving device may include a motor and a gear transmission mechanism. For example, the motor is installed on the support 11, the motor shaft is coaxially connected to the first gear, and the outer periphery of the rotating platform 12 is sleeved with a second gear, and the first gear and the second gear are meshed.

[0027] In some embodiments, Figure 1-Figure 3 As shown, there are three heads, including a first head 4 and two second heads 5 . The two second heads 5 are arranged in a mirror-symmetrical manner relative to the vertical plane where the axis of the first head 4 is located. The direction of the first head 4 is opposite to that of the second head 5 .

[0028] Therefore, after the axial directions of the first head 4 and the second head 5 are consistent with the wind direction, the first head 4 can face the wind direction, and the second head 5 can face away from the wind direction, and the first head 4 and the second head 5 are staggered in the wind blowing direction, so that the first head 4 will not excessively block the airflow blowing toward the second head 5, and the power generation efficiency of the first head 4 and the second head 5 is higher. Moreover, the first head 4 and the two second heads 5 are arranged in a triangle, and the arrangement of the three on the rotating support 12 is compact and reasonable.

[0029] Specifically, the circumferential diameter of the fan blades of the first head 4 is greater than the circumferential diameters of the fan blades of the two first heads 4 , and the height of the axis of the first head 4 is greater than the height of the axis of the second head 5 .

[0030] In some embodiments, the tower includes a first tower 2 connected to a first head 4 and a second tower 3 connected to a second head 5, the extension direction of each of the first tower 2 and the second tower 3 is angled with the axial direction of the rotating platform 12, and the distance between the central axis of each of the first tower 2 and the second tower 3 and the central axis of the rotating platform 12 gradually increases from bottom to top.

[0031] That is, the first tower 2 and the second tower 3 are inclined from bottom to top in a direction gradually moving away from each other. Therefore, on the basis of a certain upper surface area of ​​the rotating platform 12, the distance between the upper end of the first tower 2 and the upper end of the second tower 3 is made larger, so that the first head 4 and the second head 5 of a larger volume can be installed without interference, and the power generation efficiency of the multi-head floating offshore wind turbine generator set is higher.

[0032] Specifically, the length and diameter of the first tower 2 are greater than the length and diameter of the second tower 3 , and the size of the first machine head 4 is greater than the size of the second machine head 5 .

[0033] In some embodiments, Figure 1-Figure 3 As shown, the multi-head floating offshore wind turbine generator set also includes three first cross braces 6, which are located above the rotating platform 12, a first cross brace 6 is connected between the first tower 2 and any second tower 3, and a first cross brace 6 is connected between two second towers 3.

[0034] The three first cross braces 6 effectively improve the connection strength between the first tower 2 and the two second towers 3. The first tower 2 and the second tower 3 are less likely to deform relative to the rotating base 12. The first head 4 and any two of the second heads 5 are less likely to change position. The multi-head floating offshore wind turbine generator set has higher power generation efficiency and reliability and longer service life.

[0035] Specifically, the three first cross braces 6 are located at the same height, and the first cross braces 6 are connected to the first tower 2 and the second tower 3 by welding.

[0036] In some embodiments, Figure 1-Figure 3 As shown, the multi-head floating offshore wind turbine generator set also includes cables 7, the upper end of the first tower 2 is connected to the center positions of the two second towers 3 through two cables 7, and the upper end of any second tower 3 is connected to the center position of the first tower 2 and the center position of another second tower 3 through two cables 7.

[0037] Each of the first tower 2 and the second tower 3 is pulled by two cables 7, which further improves the installation strength of the first tower 2 and the two second towers 3 on the rotating platform 12. The first head 4 and the two second heads 5 are less likely to change position. The multi-head floating offshore wind turbine generator set is more suitable for complex deep-sea environments.

[0038] Specifically, the height of the lower end of the cable 7 is consistent with the height of the first cross brace 6 .

[0039] In some embodiments, Figure 4As shown, the floating foundation 1 further includes a first floating body 13, a second floating body 14 and a second cross brace 15. The first floating body 13 is installed below the support 11. There are a plurality of second floating bodies 14 and they are arranged around the first floating body 13 at intervals along the circumference of the first floating body 13. Any second floating body 14 is connected to the first floating body 13 through the second cross brace 15.

[0040] The first buoy 13 and the second buoy 14 are used to provide buoyancy for the floating foundation 1. The provision of the second cross brace 15 effectively improves the connection strength between the first buoy 13 and the second buoy 14. The overall structural strength of the floating foundation 1 is high, and the floating stability on the sea surface is high.

[0041] Specifically, the first float 13 extends in the height direction and has a cylindrical outer contour. Multiple second floats 14 are arranged around the first float 13 at equal intervals along the circumference of the first float 13. The number of second cross braces 15 is equal to and corresponds one to one to the second floats 14. Multiple second cross braces 15 are arranged around the first float 13 at equal intervals along the circumference of the first float 13.

[0042] In some embodiments, Figure 1 and Figure 4 As shown, the floating foundation 1 includes a third cross brace 16 , which is located above the second cross brace 15 and corresponds one to one. Any second floating body 14 is connected to the support 11 through the third cross brace 16 .

[0043] The third cross brace 16 and the second cross brace 15 jointly realize the connection between the first buoy 13 and any second buoy 14. The connection strength between the first buoy 13 and the second buoy 14 is higher, the floating stability of the floating foundation 1 on the sea surface is higher, and the support reliability of the tower and the nose thereon is higher.

[0044] Specifically, the number of third cross braces 16 and the number of second cross braces 15 are equal and correspond one to one, and the plurality of third cross braces 16 are arranged around the first floating body 13 at equal intervals along the circumference of the first floating body 13 , and the third cross braces 16 are located directly above the corresponding second cross braces 15 .

[0045] In some embodiments, Figure 1 and Figure 4 As shown, the floating foundation 1 further includes a heave plate 17, and the lower ends of any two adjacent second buoys 14 are connected via the heave plate 17, wherein the heave plate 17 is a horizontal plate parallel to the sea surface.

[0046] When the floating foundation 1 floats on the sea, the heave plate 17 is located below the sea surface. When the floating foundation 1 floats with the sea surface, the heave plate 17 can effectively increase the swing resistance of the floating foundation 1, so that the center of gravity of the floating foundation 1 is more stable and the nose stability thereon is higher.

[0047] In some embodiments, the mooring cable includes multiple anchor chains 8, each second buoy 14 is connected to the upper ends of at least two anchor chains 8, and on the projection plane perpendicular to the axial direction of the rotating platform 12, the projection of the lower end of the anchor chain 8 is located on the side of the projection of the upper end of the anchor chain 8 away from the projection of the first buoy 13.

[0048] This arrangement allows the mooring foundations connected to the lower ends of the anchor chains 8 to be distributed over a wider range, thereby increasing the reliability of the position of the floating foundation 1 on the sea surface when pulled by the anchor chains 8 .

[0049] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A multi-head floating offshore wind turbine generator set, characterized in that: include: A floating foundation, the floating foundation comprising a support, a rotating platform and a driving device, the rotating platform being pivotally connected to the support around its central axis, the driving device being mounted on the support and being transmission-connected to the rotating platform; A tower, wherein the tower has a plurality of towers and is discretely mounted on the rotating support; A machine head, each of which corresponds to the tower one by one, and is installed at the upper end of the corresponding tower, and the axial directions of all the machine heads are consistent; A mooring assembly comprises a mooring cable and a mooring foundation, wherein the mooring cable connects the floating foundation and the mooring foundation, and the mooring foundation is suitable for being fixed on the seabed.

2. The multi-head floating offshore wind turbine generator set according to claim 1 is characterized in that: There are three heads, including a first head and two second heads respectively. The two second heads are arranged in mirror symmetry with respect to the vertical plane where the axis of the first head is located, and the direction of the first head is opposite to that of the second head.

3. The multi-head floating offshore wind turbine generator set according to claim 2 is characterized in that: The tower includes a first tower connected to the first head and a second tower connected to the second head. The extension direction of each of the first tower and the second tower is angled with the axial direction of the rotating platform. The distance between the central axis of each of the first tower and the second tower and the central axis of the rotating platform gradually increases from bottom to top.

4. The multi-head floating offshore wind turbine generator set according to claim 3 is characterized in that: The multi-head floating offshore wind turbine generator set also includes three first cross braces, which are located above the rotating platform, the first cross braces are connected between the first tower and any second tower, and the first cross braces are connected between two second towers.

5. The multi-head floating offshore wind turbine generator set according to claim 3 is characterized in that: The multi-head floating offshore wind turbine generator set also includes a cable, and the upper end of the first tower is connected to the center positions of the two second towers respectively through the two cables, and the upper end of any second tower is connected to the center position of the first tower and the center position of another second tower respectively through the two cables.

6. The multi-head floating offshore wind turbine generator set according to claim 3, characterized in that: The length and diameter of the first tower are greater than those of the second tower, and the size of the first machine head is greater than that of the second machine head.

7. The multi-head floating offshore wind turbine generator set according to claim 1, characterized in that: The floating foundation further comprises: a first floating body, wherein the first floating body is installed below the support; a second floating body, wherein the second floating bodies are in plurality and are arranged around the first floating body at intervals along the circumference of the first floating body; A second cross brace, any second floating body is connected to the first floating body through the second cross brace.

8. The multi-head floating offshore wind turbine generator set according to claim 7, characterized in that: The floating foundation includes a third cross brace, which is located above the second cross brace and corresponds one to one, and any second floating body is connected to the support through the third cross brace.

9. The multi-head floating offshore wind turbine generator set according to claim 7, characterized in that: The floating foundation further comprises a heave plate, and the lower ends of any two adjacent second floating bodies are connected via the heave plate.

10. The multi-head floating offshore wind turbine generator set according to claim 7, characterized in that: The mooring cable comprises a plurality of anchor chains, each of the second buoys is connected to the upper ends of at least two of the anchor chains, and on a projection plane perpendicular to the axial direction of the rotating platform, the projection of the lower end of the anchor chain is located on a side of the projection of the upper end of the anchor chain away from the projection of the first buoy.

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