Offshore floating foundation and offshore wind turbine generator

Abstract

The offshore floating type foundation comprises a main frame, a plurality of supports, floating bodies and first inhaul cables, the supports are arranged around the central axis of the main frame at intervals, the upper ends of the supports are connected with the main frame, the lower ends of the supports are located below the main frame, and the floating bodies correspond to the supports one to one. The floating bodies are connected with the lower ends of the corresponding supports, and a first inhaul cable is connected between the lower ends of any two adjacent supports. The offshore floating foundation provided by the invention has the advantages of reliable strength and low cost.

Description

Technical Field

[0001] The present invention relates to the technical advantages of offshore power generation, and in particular to an offshore floating foundation and an 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, has been widely used. At present, my country's offshore wind farms are mainly deployed 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.

[0003] The wind turbines in the related technology mainly adopt fixed foundations. However, the cost of fixed foundations increases significantly when the water depth exceeds 50 meters, while the technical route based on floating wind turbines is still immature and has the defect of high cost. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides an offshore floating foundation, which has the advantages of reliable strength and low cost.

[0006] An embodiment of the present invention further provides an offshore wind turbine.

[0007] The offshore floating foundation of an embodiment of the present invention includes a main frame, a bracket, a buoy and a first cable, wherein the bracket is in plurality and arranged at intervals around the central axis of the main frame, the upper end of the bracket is connected to the main frame, and the lower end of the bracket is located below the main frame; the buoy corresponds to the bracket one by one, and the buoy is connected to the lower end of the corresponding bracket; the first cable is connected between the lower ends of any two adjacent brackets.

[0008] According to the offshore floating foundation of the embodiment of the present invention, the main frame floats on the sea surface through multiple floats, and the bracket is connected between the main frame and the float to complete the rigid connection between the two. On this basis, by connecting the first cable between the lower ends of any two adjacent brackets, under the linkage of multiple first cables, the lower end of the bracket is less likely to deform relative to the main frame away from the remaining brackets under the impact of seawater, and the overall structural reliability of the offshore floating foundation is higher. At the same time, the first cable uses less material than the cross-bracing structure in the related art, so that the weight of the offshore floating foundation is lighter and the cost is lower.

[0009] In some embodiments, the lower end of the bracket is inclined relative to the upper end in a direction away from the central axis of the main frame; the offshore floating foundation also includes a second cable, the second cable corresponds to the bracket one by one, the upper end of the second cable is connected to the main frame, the lower end of the second cable is connected to the lower end of the corresponding bracket, and the upper end of the second cable is located on the side of the upper end of the corresponding bracket away from the central axis of the main frame.

[0010] In some embodiments, the main frame includes a first cross brace and a second cross brace, the number of the first cross braces is equal to the number of the brackets, and multiple first cross braces are connected end to end in sequence and surround the molded installation cavity; the second cross brace is located in the installation cavity, and any two adjacent first cross braces are connected with the second cross brace, and the upper end of the bracket is connected to the second cross brace.

[0011] In some embodiments, any two adjacent first cross braces are connected via a transition piece, the transition piece extends along the height direction of the main frame, and the upper end of the second cable is connected to the transition piece.

[0012] In some embodiments, the support includes at least two oblique braces, the upper ends of the oblique braces are connected to the second transverse brace, and the lower ends of all the oblique braces are connected to the corresponding floating bodies.

[0013] In some embodiments, the support includes two diagonal braces, and the distance between the two diagonal braces gradually decreases toward the direction approaching the corresponding floating body.

[0014] In some embodiments, the floating body includes a buoy, the outer contour of the buoy is cylindrical, and the axial direction of the buoy is perpendicular to the height direction of the main frame;

[0015] The bracket also includes a third cross brace, the lower ends of all the oblique braces are connected to the third cross brace, and the third cross brace is connected to the outer peripheral surface of the buoy.

[0016] In some embodiments, the main frame further comprises a connecting leg for connecting to an anchor chain, the connecting leg corresponding to the first cross brace one by one, and the connecting leg is connected to a side of the corresponding first cross brace away from the installation cavity.

[0017] In some embodiments, the number of the supports is three, four or six.

[0018] An offshore wind turbine according to an embodiment of the present invention includes an offshore floating foundation as described in any of the above embodiments.

[0019] The technical advantages of the offshore wind turbine according to the embodiment of the present invention are the same as the technical advantages of the offshore floating foundation in the above-mentioned embodiment, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of an offshore floating foundation according to an embodiment of the present invention.

[0021] Figure 2 4 is a front view of an offshore floating foundation according to an embodiment of the present invention.

[0022] Figure 3 is a top view of an offshore floating foundation according to an embodiment of the present invention.

[0023] Figure 4 It is a partial enlarged view of the offshore floating foundation at the support according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] 1. Main frame; 11. First cross brace; 12. Second cross brace; 13. Adapter; 14. Connecting leg; 2. Bracket; 21. Diagonal brace; 22. Third cross brace; 3. First cable; 4. Second cable; 5. Floating body; 6. Anchor chain. DETAILED DESCRIPTION

[0026] 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.

[0027] Combine the following Figure 1-Figure 4 An offshore floating foundation according to an embodiment of the present invention is described.

[0028] The offshore floating foundation of the embodiment of the present invention comprises a main frame 1, a bracket 2, a floating body 5 and a first cable 3. There are a plurality of brackets 2 and they are arranged at intervals around the central axis of the main frame 1, the upper end of the bracket 2 is connected to the main frame 1, and the lower end of the bracket 2 is located below the main frame 1. The floating body 5 corresponds to the bracket 2 one by one, and the floating body 5 is connected to the lower end of the corresponding bracket 2. The first cable 3 is connected between the lower ends of any two adjacent brackets 2.

[0029] According to the offshore floating foundation of the embodiment of the present invention, the main frame 1 floats on the sea surface through multiple floats 5, and the bracket 2 is connected between the main frame 1 and the float 5 to complete the rigid connection between the two. On this basis, by connecting the first cable 3 between the lower ends of any two adjacent brackets 2, under the linkage of multiple first cables 3, the lower end of the bracket 2 is less likely to deform relative to the main frame 1 away from the remaining brackets 2 under the impact of seawater, and the overall structural reliability of the offshore floating foundation is higher. At the same time, the first cable 3 uses less material than the cross-bracing structure in the related art, so that the offshore floating foundation is lighter and less expensive.

[0030] It should be noted that the first cable 3 is a chain-like structure, and supports the bracket 2 mainly in the form of tension.

[0031] In some embodiments, Figure 2 As shown, the lower end of the bracket 2 is inclined relative to the upper end in a direction away from the central axis of the main frame 1, and the offshore floating foundation also includes a second cable 4, which corresponds to the bracket 2 one by one, the upper end of the second cable 4 is connected to the main frame 1, and the lower end of the second cable 4 is connected to the lower end of the corresponding bracket 2, and the upper end of the second cable 4 is located on the side of the upper end of the corresponding bracket 2 away from the central axis of the main frame 1.

[0032] At this time, when the main frame 1 floats on the sea surface through the floating body 5, under the impact of seawater, the bracket 2 is more likely to deform relative to the main frame 1 in the direction away from the other brackets 2, so that the first cable 3 can support the bracket 2 in the horizontal direction. The provision of the second cable 4 further prevents the lower end of the bracket 2 from moving in the direction close to the adjacent bracket 2 under the pull of the first cable 3, and the overall structural strength of the offshore floating foundation is higher and the cost is lower.

[0033] In some embodiments, the main frame 1 includes a first cross brace 11 and a second cross brace 12. The number of the first cross braces 11 is equal to the number of the brackets 2. The plurality of first cross braces 11 are connected end to end and surround the molded installation cavity. The second cross brace 12 is located in the installation cavity. Any two adjacent first cross braces 11 are connected with a second cross brace 12. The upper end of the bracket 2 is connected to the second cross brace 12.

[0034] The provision of the second cross brace 12 effectively improves the connection strength between any two adjacent first cross braces 11, and the angle between the two adjacent first cross braces 11 is less likely to change under the impact of seawater. On this basis, the main frame 1 can more reliably support the upper tower and the nose.

[0035] Specifically, the mounting cavity formed around the plurality of first cross braces 11 is a regular polygon, that is, the angles between any two adjacent first cross braces 11 are equal, and the two adjacent first cross braces 11 and the second cross brace 12 therebetween form a triangular reinforcement structure.

[0036] In some embodiments, Figure 1-Figure 4 As shown, any two adjacent first cross braces 11 are connected via an adapter 13 . The adapter 13 extends along the height direction of the main frame 1 , and the upper end of the second cable 4 is connected to the adapter 13 .

[0037] At this time, the first cross brace 11 can be a common steel pipe structure, with different settings for the hook structure connected to the second cable 4. The first cross brace 11 is easy to process and the connection cost of two adjacent first cross braces 11 is low.

[0038] Specifically, the outer contour of the adapter 13 is generally a cylindrical shape extending in the height direction. The end face of the first cross brace 11 is welded to the outer peripheral surface of the adapter 13. The outer peripheral surface of the adapter 13 may be provided with a hook-like structure, and the upper end of the second cable 4 is connected to the hook-like structure.

[0039] In some embodiments, Figure 1 and Figure 2 As shown, the support 2 includes at least two oblique braces 21 , the upper ends of the oblique braces 21 are connected to the second transverse brace 12 , and the lower ends of all the oblique braces 21 are connected to the corresponding floating bodies 5 .

[0040] The provision of at least two diagonal braces 21 forms at least two connection points between the bracket 2 and the main frame 1, and the force between the two is dispersed. The portion of the main frame 1 connected to the diagonal brace 21 is less likely to deform, and the diagonal brace 21 is less likely to deform relative to the main frame 1, thereby increasing the connection strength between the float 5 and the main frame 1.

[0041] Specifically, the number of the diagonal braces 21 may be two, three or four, and the extending direction of the diagonal braces 21 forms an angle with the height direction.

[0042] In some embodiments, Figure 1-Figure 4 As shown, the support 2 includes two diagonal braces 21 , and the distance between the two diagonal braces 21 gradually decreases toward the direction approaching the corresponding floating body 5 .

[0043] At this time, the two diagonal braces 21 and the floating body 5 substantially form a triangular reinforcement structure, so that the structural strength of the bracket 2 itself is higher, and thus the connection strength between the floating body 5 and the main frame 1 is higher.

[0044] Specifically, the two diagonal braces 21 are arranged in mirror symmetry with respect to a vertical plane perpendicular to the axial direction of the second cross brace 12 , and on a projection plane perpendicular to the height direction of the main frame 1 , the projection of the lower end of the diagonal brace 21 is located outside the projection of the main frame 1 .

[0045] In some embodiments, Figure 1-Figure 4 As shown, the floating body 5 includes a buoy, the outer contour of the buoy is cylindrical, and the axial direction of the buoy is perpendicular to the height direction of the main frame 1. The bracket 2 also includes a third cross brace 22, the lower ends of all the diagonal braces 21 are connected to the third cross brace 22, and the third cross brace 22 is connected to the outer peripheral surface of the buoy.

[0046] The extension direction of the third cross brace 22 is consistent with the extension direction of the buoy. Compared with the lower end of the diagonal brace 21 directly connected to the buoy, the connection area between the third cross brace 22 and the floating body 5 is larger, and thus the connection strength between the two is higher. Moreover, this arrangement realizes the module-down processing of the bracket 2, and the connection difficulty of the bracket 2 and the buoy through the third cross brace 22 is lower.

[0047] Specifically, the lower ends of the two oblique braces 21 are spaced apart along the axial direction of the third transverse brace 22 , and the outer circumference of the third transverse brace 22 is welded to the outer circumference of the buoy.

[0048] In some embodiments, Figure 1-Figure 3 As shown, the main frame 1 further comprises a connecting leg 14 for connecting to the anchor chain 6, the connecting leg 14 corresponds to the first cross brace 11 one by one, and the connecting leg 14 is connected to the side of the corresponding first cross brace 11 away from the installation cavity.

[0049] That is, the anchor chain 6 is connected to the first cross brace 11 through the connecting leg 14, which can disperse the force between the anchor chain 6 and the first cross brace 11 on the main frame 1. Compared with the anchor chain 6 being directly connected to the buoy, it can effectively avoid excessive force on the buoy and affect the connection stability between the buoy and the main frame 1.

[0050] Specifically, the connecting leg 14 is disposed at the center position of the corresponding first cross brace 11 , and the connecting leg 14 is welded to the first cross brace 11 .

[0051] In some embodiments, the number of the brackets 2 is three, four or six.

[0052] That is, the number of the first cross braces 11 of the main frame 1 can be three, four or six, as long as the outer contour of the surrounding mounting cavity is a regular polygon, the center of gravity of the main frame 1 can be ensured to be located on its central axis.

[0053] An offshore wind turbine according to an embodiment of the present invention includes an offshore floating foundation as described in any of the above embodiments.

[0054] The technical advantages of the offshore wind turbine according to the embodiment of the present invention are the same as the technical advantages of the offshore floating foundation in the above-mentioned embodiment, which will not be described in detail here.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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. An offshore floating foundation, characterized in that: include: Main frame; A bracket, wherein the bracket is provided in plurality and arranged at intervals around the central axis of the main frame, the upper end of the bracket is connected to the main frame, and the lower end of the bracket is located below the main frame; A floating body, wherein the floating body corresponds to the bracket one by one, and the floating body is connected to the lower end of the corresponding bracket; A first cable is connected between the lower ends of any two adjacent brackets.

2. The offshore floating foundation according to claim 1, characterized in that: The lower end of the bracket is inclined relative to the upper end in a direction away from the central axis of the main frame; The offshore floating foundation also includes a second cable, which corresponds to the bracket one by one, the upper end of the second cable is connected to the main frame, the lower end of the second cable is connected to the lower end of the corresponding bracket, and the upper end of the second cable is located on the side of the upper end of the corresponding bracket away from the central axis of the main frame.

3. The offshore floating foundation according to claim 2, characterized in that: The main framework includes: first cross braces, the number of which is equal to the number of the brackets, and a plurality of the first cross braces are sequentially connected end to end and surround the molded mounting cavity; A second cross brace is disposed in the installation cavity, and any two adjacent first cross braces are connected with the second cross brace. The upper end of the bracket is connected with the second cross brace.

4. The offshore floating foundation according to claim 3, characterized in that: Any two adjacent first cross braces are connected via a transition piece, the transition piece extends along the height direction of the main frame, and the upper end of the second cable is connected to the transition piece.

5. The offshore floating foundation according to claim 3, characterized in that: The support comprises at least two oblique supports, the upper ends of the oblique supports are connected to the second transverse supports, and the lower ends of all the oblique supports are connected to the corresponding floating bodies.

6. The offshore floating foundation according to claim 5, characterized in that: The support comprises two oblique supports, and the distance between the two oblique supports gradually decreases toward the direction approaching the corresponding floating body.

7. The offshore floating foundation according to claim 5, characterized in that: The floating body comprises a buoy, the outer contour of the buoy is cylindrical, and the axial direction of the buoy is perpendicular to the height direction of the main frame; The bracket also includes a third cross brace, the lower ends of all the oblique braces are connected to the third cross brace, and the third cross brace is connected to the outer peripheral surface of the buoy.

8. The offshore floating foundation according to claim 3, characterized in that: The main frame further comprises a connecting leg for connecting with the anchor chain, the connecting leg corresponds to the first cross brace one by one, and the connecting leg is connected to a side of the corresponding first cross brace away from the installation cavity.

9. The offshore floating foundation according to any one of claims 1 to 8, characterized in that: The number of the brackets is three, four or six.

10. An offshore wind turbine generator system, comprising the offshore floating foundation according to any one of claims 1 to 9.

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