Single-point mooring floating type offshore wind turbine

Abstract

The invention discloses a single-point mooring floating type offshore wind turbine which comprises a floating foundation, a mooring assembly and a sail, a tower drum is arranged on the floating foundation, a machine head is installed at the upper end of the tower drum, the mooring assembly comprises a mooring cable and a mooring foundation, the mooring cable is connected with the floating foundation and the mooring foundation, and the mooring cable is connected with the mooring foundation. The mooring foundation is suitable for being fixed to the seabed, the sail is installed above the floating foundation, and the floating foundation is suitable for being driven by the sail to rotate around the mooring cable so that a machine head can face the wind direction. The single-point mooring floating type offshore wind turbine has the advantages that the utilization rate of wind energy resources is high, and the power generation efficiency of the wind turbine is high.

Description

Technical Field

[0001] The invention relates to the technical field of offshore discharge, and in particular to a single-point mooring floating offshore wind turbine. Background Art

[0002] Whether it is a fixed foundation or a floating wind turbine, the direction of the wind turbine is fixed. However, due to the complex and changeable environment of the sea surface (especially the deep sea), the wind turbine cannot always face the wind direction, resulting in 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 single-point mooring floating offshore wind turbine, which has the advantages of high utilization rate of wind energy resources and high wind turbine power generation efficiency.

[0005] The single-point mooring floating offshore wind turbine of an embodiment of the present invention comprises a floating foundation, a mooring assembly and a sail, wherein the floating foundation is provided with a tower, and a machine head is installed on the upper end of the tower; the mooring assembly comprises a mooring cable and a mooring foundation, the mooring cable connects the floating foundation and the mooring foundation, and the mooring foundation is suitable for being fixed on the seabed; the sail is installed above the floating foundation, and the floating foundation is suitable for rotating around the mooring cable driven by the sail so that the machine head faces the wind direction.

[0006] According to the single-point moored floating offshore wind turbine of the embodiment of the present invention, the tower and the head float on the sea surface through the floating foundation, and are fixed to the set area on the seabed through the mooring cable and the mooring foundation, and the tower, the head and the floating foundation can rotate around the mooring cable as a whole. At this time, by setting a sail above the floating foundation, in a windy environment, the sail can always be gradually adjusted to the position with the least wind resistance under the action of wind force. At this time, the head faces the wind direction, and can withstand greater wind force, so as to better utilize wind energy resources and the head has higher power generation efficiency.

[0007] In some embodiments, the floating foundation includes a first buoy, a first cross brace, and a second buoy connected in sequence, the tower is disposed on the first buoy, the upper end of the mooring cable is connected to the first buoy, and the sail is disposed on a side of the tower facing the second buoy.

[0008] In some embodiments, the sail includes a first pole, a second pole and a canvas, wherein the first end and the second end of the first pole are respectively connected to the first floating body and the second floating body; the second pole is connected to the tower, and the second pole is at an angle to the first pole; and the canvas is connected between the first pole and the second pole.

[0009] In some embodiments, the first end of the second strut is pivotally connected to the first end of the first strut so that the canvas has a folded position and an unfolded position;

[0010] The single-point mooring floating offshore wind turbine also includes a driving device, which is installed on the tower and is transmission-connected to the second strut.

[0011] In some embodiments, the driving device includes a winch, and a free end of a cable on the winch is connected to the second end of the second support rod.

[0012] In some embodiments, the mooring line comprises a tension hamstring tendon and the mooring foundation comprises a suction cylinder.

[0013] In some embodiments, the number of the suction cylinder is one, the number of the tension hamstring tendons is at least two, and all the tension hamstring tendons are arranged adjacent to each other in pairs.

[0014] In some embodiments, the first floating body includes a first buoy, the outer contour of the first buoy is cylindrical, and the first buoy is coaxial with the tower.

[0015] In some embodiments, the second floating body includes a heave plate and a second buoy disposed above the heave plate, and the second buoy is connected to the first cross brace.

[0016] In some embodiments, the floating foundation further includes a plurality of third floats, wherein the plurality of third floats and the second floats are arranged around the first float along the circumference of the first float at intervals, and each of the third floats is connected to the first float via a second cross brace. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an axonometric view of a single-point moored floating offshore wind turbine according to an embodiment of the present invention.

[0018] Figure 2 is a front view of a single-point moored floating offshore wind turbine according to an embodiment of the present invention, wherein the sail is in an unfolded position.

[0019] Figure 3 is another front view of a single-point moored floating offshore wind turbine according to an embodiment of the present invention, wherein the sail is in a folded position.

[0020] Reference numerals:

[0021] 1. First buoy; 2. First cross brace; 3. Second buoy; 31. Second buoy; 32. Heave plate; 4. Tower; 5. Nose; 6. Sail; 61. Canvas; 62. First strut; 63. Second strut; 7. Tension hamstring tendon; 8. Suction cylinder; 9. Cable. 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 3 A single-point moored floating offshore wind turbine according to an embodiment of the present invention is described.

[0024] The single-point mooring floating offshore wind turbine of the embodiment of the present invention comprises a floating foundation, a mooring assembly and a sail 6. A tower 4 is provided on the floating foundation, and a head 5 is installed on the upper end of the tower 4. The mooring assembly comprises a mooring cable and a mooring foundation, the mooring cable connects the floating foundation and the mooring foundation, and the mooring foundation is suitable for being fixed on the seabed. The sail 6 is installed above the floating foundation, and the floating foundation is suitable for rotating around the mooring cable driven by the sail 6 so that the head 5 faces the wind direction.

[0025] According to the single-point moored floating offshore wind turbine of the embodiment of the present invention, the tower 4 and the head 5 float on the sea surface through the floating foundation, and are fixed to the set area on the seabed through the mooring cable and the mooring foundation, and the tower 4, the head 5 and the floating foundation as a whole can rotate around the mooring cable. At this time, by setting the sail 6 above the floating foundation, in a windy environment, the sail 6 can always be gradually adjusted to the position with the least wind resistance under the action of wind force. At this time, the head 5 faces the wind direction, and then withstands greater wind force, so as to better utilize wind energy resources, and the power generation efficiency of the head 5 is higher.

[0026] It should be noted that the sail 6 is generally triangular in shape, and when it is located at the position with the least wind resistance, it is parallel to the wind direction and also parallel to the axial direction of the head 5. By setting the sail 6 to adjust the position of the head 5, the single-point moored floating offshore wind turbine of this embodiment can adapt to the complex and changeable environment of the deep sea, and the cost is lower than that of the fixed foundation offshore wind turbine.

[0027] In some embodiments, Figure 1-Figure 3 As shown, the floating foundation includes a first buoy 1, a first cross brace 2 and a second buoy 3 connected in sequence, a tower 4 is arranged on the first buoy 1, the upper end of the mooring cable is connected to the first buoy 1, and a sail 6 is arranged on the side of the tower 4 facing the second buoy 3.

[0028] Therefore, when the floating foundation rotates around the mooring cable, the head 5 and the tower 4 basically rotate around the central axis of the tower 4, and the horizontal movement distance of the head 5 is smaller, so that the deviation correction of the head 5 is more labor-saving and the deviation correction efficiency is higher, thereby making the power generation efficiency of the head 5 higher.

[0029] Specifically, the center of gravity of the tower 4 is located directly above the center of gravity of the first floating body 1 , the sail 6 is located behind the nose 5 , and the upper end of the mooring cable is substantially connected to the center of the bottom surface of the first floating body 1 .

[0030] In some embodiments, Figure 1 and Figure 2 As shown, the sail 6 includes a first strut 62, a second strut 63 and a canvas 61. The first end and the second end of the first strut 62 are respectively connected to the first floating body 1 and the second floating body 3. The second strut 63 is connected to the tower 4, and the second strut 63 is at an angle to the first strut 62. The canvas 61 is connected between the first strut 62 and the second strut 63.

[0031] The first support rod 62 and the second support rod 63 support the canvas 61 , thereby ensuring that the canvas 61 always remains in an unfolded state when subjected to wind impact, thereby better ensuring the reliability of the deviation correction of the nose 5 .

[0032] Specifically, the canvas 61 is generally triangular and is preferably made of waterproof material. The first support rod can be a hard support rod or a bendable hose. The second support rod is a hard support rod, the upper end of which is connected to the upper end of the tower 4. The second support rod is relatively fixed relative to the first buoy 1 and the tower 4 to ensure that the canvas 61 is stably in the unfolded position.

[0033] In some embodiments, Figure 2 and Figure 3 As shown, the first end of the second strut 63 is pivotally connected to the first end of the first strut 62, so that the canvas 61 has a folded position and an unfolded position. The single-point moored floating offshore wind turbine also includes a drive device, which is installed on the tower 4 and is transmission-connected to the second strut 63.

[0034] The driving device can drive the second support rod 63 to rotate relative to the first support rod 62 to complete the switching of the canvas 61 between the folded position and the unfolded position. At this time, in weather with low wind speed, the canvas 61 can be kept in the unfolded position to complete the deviation correction function of the head 5 and ensure that the head 5 has good power generation efficiency. In weather with high wind speed and unstable wind direction such as typhoon, the canvas 61 can be switched to the folded position to prevent the canvas 61 from being damaged by excessive impact, and also to prevent the single-point moored floating offshore wind turbine from being subjected to excessive impact force and causing the cable foundation to be separated from the seabed.

[0035] Specifically, the extension direction of the pivot axis of the second support rod 63 relative to the first support rod 62 is perpendicular to the extension direction of the first support rod 62. The first support rod 62 is located above the first cross brace 2, and the extension direction of the first support rod 62 is consistent with the extension direction of the first cross brace 2. When the canvas 61 is in the folded position, the angle between the first support rod 62 and the second support rod 63 approaches zero.

[0036] In some embodiments, the driving device comprises a winch, and the free end of the cable 9 on the winch is connected to the second end of the second support rod 63 .

[0037] The cable 9 is retracted and released by the winch to adjust the angle between the second support rod 63 and the first support rod 62. The position adjustment of the second support rod 63 is simple, convenient and low-cost.

[0038] Specifically, the winch is installed at the upper end of the tower 4. When the canvas 61 is in the unfolded position, the second support rod 63 is still at an angle with the tower 4 and is located on the side of the tower 4 facing the second floating body 3. At this time, the canvas 61 is in a tensioned state under the pull of the cable 9. When the canvas 61 needs to be folded, the cable 9 only needs to be released so that the second support rod 63 automatically swings downward under the action of gravity.

[0039] In some embodiments, the mooring cable comprises a tension hamstring tendon 7 and the mooring foundation comprises a suction cylinder 8 .

[0040] The tension hamstring tendon 7 is a slow-bonding steel strand to which tension is applied. Combined with the suction cylinder 8, it can better ensure the reliability of the floating foundation staying on the sea surface, and the single-point moored floating offshore wind turbine is less likely to change position in a complex sea surface environment.

[0041] Specifically, Figure 1-Figure 3 As shown, there is one suction tube 8, and there are at least two tension hamstrings 7, and all tension hamstrings 7 are arranged adjacent to each other. At this time, when the floating foundation rotates around the tension hamstrings 7, the tension hamstrings 7 exert a smaller reaction force on the floating foundation when they rotate synchronously, and the head 5 can be more reliably opposite to the wind direction, thereby better ensuring the power generation efficiency of the head 5.

[0042] For example, Figure 1 As shown, the number of the tension hamstring tendons 7 is three, and the three tension hamstring tendons 7 are parallel to each other in pairs.

[0043] In some embodiments, the first floating body 1 includes a first buoy, the outer contour of the first buoy is cylindrical, and the first buoy is coaxial with the tower 4 .

[0044] Therefore, when the first buoy 1 rotates around the mooring cable, the tower 4 rotates by itself, and the tower 4 and the nose 5 thereon rotate more effortlessly. At this time, the area of ​​the sail 6 can be designed to be smaller, thereby requiring lower costs.

[0045] Specifically, the first floating body 1 further includes a first frame, the first buoy is fixed on the first frame, and the first frame is welded to the first cross brace 2 .

[0046] In some embodiments, the second floating body 3 includes a heave plate 32 and a second buoy 31 disposed above the heave plate 32 , and the second buoy 31 is connected to the first cross brace 2 .

[0047] The provision of the heave plate 32 makes it less likely for the second buoy 3 to float up and down significantly when rotating around the first buoy, thereby making the center of gravity of the floating foundation more stable and the nose 5 thereon more stable.

[0048] Specifically, the second floating body 3 further includes a second frame welded to the first cross brace 2 , and the second buoy 31 is installed on the second frame.

[0049] In some embodiments, the floating foundation further includes a plurality of third floats, wherein the plurality of third floats and the second floats 3 are arranged around the first float 1 at intervals along the circumference of the first float 1, and each third float is connected to the first float 1 via a second cross brace.

[0050] With the joint support of the second buoy 3 and multiple third buoys, the tower 4 and wind turbine on the first buoy 1 are less likely to swing at a large angle, and the floating foundation can stably support the engine head 5 at a higher height, thereby better ensuring the power generation efficiency of the engine head 5.

[0051] Specifically, the structure of the third buoy is the same as that of the second buoy 3 , the number of the third buoys may be three or four, and the second buoy 3 and all the third buoys are arranged around the first buoy at equal intervals along the circumference of the first buoy.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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 single-point moored floating offshore wind turbine, characterized in that: include: A floating foundation, wherein a tower is provided on the floating foundation, and a machine head is installed at the upper end of the tower; A mooring assembly, the mooring assembly comprising a mooring cable and a mooring foundation, the mooring cable connecting the floating foundation and the mooring foundation, and the mooring foundation being suitable for being fixed on the seabed; A sail is installed above the floating foundation, and the floating foundation is suitable for rotating around the mooring cable driven by the sail so that the nose of the aircraft faces the wind direction.

2. The single-point mooring floating offshore wind turbine according to claim 1, characterized in that: The floating foundation includes a first buoy, a first cross brace and a second buoy which are connected in sequence. The tower is arranged on the first buoy, the upper end of the mooring cable is connected to the first buoy, and the sail is arranged on a side of the tower facing the second buoy.

3. The single-point mooring floating offshore wind turbine according to claim 2 is characterized in that: The sail comprises: a first support rod, wherein a first end and a second end of the first support rod are connected to the first floating body and the second floating body respectively; a second strut, the second strut being connected to the tower, the second strut being at an angle to the first strut; A canvas is connected between the first strut and the second strut.

4. The single-point mooring floating offshore wind turbine according to claim 3 is characterized in that: The first end of the second strut is pivotally connected to the first end of the first strut so that the canvas has a folded position and an unfolded position; The single-point mooring floating offshore wind turbine also includes a driving device, which is installed on the tower and is transmission-connected to the second strut.

5. The single-point mooring floating offshore wind turbine according to claim 4 is characterized in that: The driving device comprises a winch, and the free end of the cable on the winch is connected to the second end of the second support rod.

6. The single-point mooring floating offshore wind turbine according to claim 2, characterized in that: The mooring cable comprises a tension hamstring tendon and the mooring foundation comprises a suction cylinder.

7. The single-point mooring floating offshore wind turbine according to claim 6, characterized in that: The number of the suction cylinder is one, the number of the tension hamstring tendons is at least two, and all the tension hamstring tendons are arranged adjacent to each other in pairs.

8. The single-point mooring floating offshore wind turbine according to claim 2, characterized in that: The first floating body comprises a first buoy, the outer contour of the first buoy is cylindrical, and the first buoy is coaxial with the tower.

9. The single-point mooring floating offshore wind turbine according to claim 2, characterized in that: The second floating body includes a heave plate and a second buoy arranged above the heave plate, and the second buoy is connected to the first cross brace.

10. The single-point mooring floating offshore wind turbine according to any one of claims 2 to 9, characterized in that: The floating foundation further includes a plurality of third floating bodies, wherein the plurality of third floating bodies and the second floating bodies are arranged around the first floating body at intervals along the circumference of the first floating body, and each of the third floating bodies is connected to the first floating body via a second cross brace.

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