Semi-active wind facing single-point mooring floating type fan

Abstract

The invention discloses a semi-active wind-facing single-point mooring floating type fan, the semi-active wind-facing single-point mooring floating type fan comprises a floating type foundation, a fan body and an anti-flow rudder, the floating type foundation is used for floating in seawater, the floating type foundation comprises at least two stand columns, and the stand columns are connected with the fan body. Any two adjacent stand columns are connected through a connecting frame, the multiple stand columns comprise one first stand column and at least one second stand column, and a mooring rotor is installed at the bottom end of the first stand column. The number of the draught fan is at least one, and the draught fan is used for being installed at the top end of the second stand column. The number of the anti-flow rudders is at least one, the anti-flow rudders are used for being installed at the bottom end of the second stand column, and the anti-flow rudders are used for providing lifting force in the horizontal direction for the second stand column under the effect of ocean currents. According to the semi-active wind-facing single-point mooring floating type draught fan, the influence of the current load can be reduced, it is ensured that the draught fan is always aligned with the wind load, and the power production efficiency is improved.

Description

Technical Field

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

[0002] Offshore wind power construction is developing rapidly and is moving towards deeper and farther seas. The good adaptability of floating wind turbines in water depth will bring them a broader market space.

[0003] Compared with traditional floating wind turbines, semi-active single-point moored floating wind turbines can rotate 360 ​​degrees around the mooring point. When subjected to wind load, the wind turbine passively rotates around the mooring point to the downwind position, realizing the passive wind facing of the wind turbine and eliminating the yaw system. In addition, if a twin-head floating wind turbine uses a yaw system, a wake effect will be generated between the two heads, so the single-point mooring advantage is more obvious on a twin-head floating wind turbine.

[0004] In the marine environment, the passive wind direction of a single-point moored wind turbine is affected not only by wind loads but also by currents and waves. When there is a certain angle between the current load and the wind load, the wind turbine will be offset and cannot face the wind accurately. In addition, since the multi-position mooring is converted to a single-point mooring, the wind turbine's yaw motion is more obvious when affected by waves. Both of the above defects will threaten the safety, reliability and power generation of the wind turbine. Summary of the invention

[0005] The main purpose of the present invention is to provide a semi-active wind-facing single-point moored floating wind turbine, aiming to solve the problem that the existing single-point moored floating wind turbine cannot accurately face the wind due to the deviation of the wind turbine direction under the influence of flow load.

[0006] To achieve the above object, the present invention provides a semi-active wind-facing single-point mooring floating wind turbine, which comprises:

[0007] A floating foundation, wherein the floating foundation is used to float in seawater, and the floating foundation comprises at least two columns, any two adjacent columns are connected by a connecting frame, and the plurality of columns comprises a first column and at least one second column, and a mooring rotor is installed at the bottom end of the first column;

[0008] A fan, the number of which is at least one, and the fan is used to be installed at the top of the second column;

[0009] An anti-current rudder, the number of which is at least one, the anti-current rudder being used to be installed at the bottom end of the second column, and the anti-current rudder being used to provide horizontal lift to the second column under the action of the ocean current;

[0010] In one embodiment, a cross-section of the anti-flow fin is in the shape of an airfoil.

[0011] In one embodiment, a sway stabilization plate is installed at the bottom end of each of the columns, and the cross section of the sway stabilization plate along the horizontal direction is larger than the cross section of the column.

[0012] In one embodiment, a plurality of reinforcing ribs are connected between the anti-roll plate and the corresponding column, and the plurality of reinforcing ribs are arranged at intervals along the circumference of the column.

[0013] In one embodiment, the anti-roll plate is annular.

[0014] In one embodiment, a mooring rotor is further provided at the bottom end of the first column, the first column is rotatably connected to the mooring rotor, the mooring rotor is connected to a plurality of mooring cables, and one end of the mooring cable away from the mooring rotor is used for fixing to the seabed.

[0015] In one embodiment, the mooring rotor is further connected to a cable, and the cable is passed through the mooring rotor and the column.

[0016] In one embodiment, the connecting frame includes a first cross bar, a second cross bar and a plurality of connecting rods, the first cross bar and the second cross bar are arranged at intervals along the vertical direction, the connecting rod is located between the first cross bar and the second cross bar and connects the first cross bar and the second cross bar, and the plurality of connecting rods are arranged at intervals along the extension direction of the first cross bar.

[0017] In one embodiment, a reinforcing rod is connected between any two adjacent first cross bars and any two adjacent second cross bars.

[0018] In one embodiment, the wind turbine includes a fan blade and a tower, the fan blade is installed on the top of the tower, and the tower is installed on the top of the second column.

[0019] In the technical solution of the present invention, a semi-active single-point moored floating wind turbine comprises a floating foundation, a wind turbine and a flow-resistance rudder. The floating foundation is used to support the wind turbine installed on its top. The floating foundation comprises a first column and at least one second column. Each adjacent column is connected by a connecting frame to ensure that the floating foundation has sufficient stability. A mooring rotor is arranged at the top of the first column, a wind turbine is arranged at the top of the second column, and a flow-resistance rudder is arranged at the bottom of the second column, so that the two flow-resistance rudders cooperate to generate lift to resist the flow load, thereby enabling the semi-active single-point moored floating wind turbine of this embodiment to reduce the influence of the flow load, ensuring that the wind turbine is always aligned with the wind load, and improving the power production efficiency of the semi-active single-point moored floating wind turbine of this embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a semi-active wind-facing single-point mooring floating wind turbine provided by the present invention;

[0022] Figure 2 A bottom-up structural schematic diagram of an embodiment of a semi-active wind-facing single-point mooring floating wind turbine provided by the present invention;

[0023] Figure 3 A bottom-up structural schematic diagram of another embodiment of a semi-active wind-facing single-point mooring floating wind turbine provided by the present invention;

[0024] Figure 4 A schematic diagram of the three-dimensional structure of an embodiment of a floating foundation provided by the present invention;

[0025] Figure 5 A schematic structural diagram of an embodiment of a second column and an anti-flow rudder provided by the present invention;

[0026] Figure 6 This is a schematic structural diagram of an embodiment of the first column and the mooring rotor provided by the present invention.

[0027] Description of Figure Numbers:

[0028] 100. Semi-active single-point moored floating wind turbine facing the wind; 1. Floating foundation; 11. First column; 12. Second column; 13. Connecting frame; 131. First crossbar; 132. Second crossbar; 133. Connecting rod; 134. Reinforcing rod; 2. Wind turbine; 21. Wind blade; 22. Tower; 14. Stabilizer plate; 141. Reinforcing rib; 15. Mooring rotor; 16. Mooring cable; 17. Cable; 3. Flow rudder; 4. Flow load; 5. Wind load; 6. Lift.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] Offshore wind power construction is developing rapidly and is moving towards deeper and farther seas. The good adaptability of floating wind turbines in water depth will bring them a broader market space.

[0034] Compared with traditional floating wind turbines, the dual-head semi-active wind-facing single-point mooring floating wind turbine has two wind turbines installed on a single floating foundation, which can effectively share the cost of the floating foundation. In addition, the single-point mooring system can make the two wind turbines passively facing the wind, and keep the rotors of the two wind turbines in the same plane to minimize the impact of wake.

[0035] In the marine environment, the passive wind-facing of a semi-active single-point moored floating wind turbine is affected by currents and waves (flow loads) in addition to the wind load. The wind turbine will be offset in direction under the influence of the flow load. When there is a certain angle between the flow load and the wind load, the semi-active single-point moored floating wind turbine will be deflected under the influence of the flow load, and the blades of the wind turbine cannot maintain an angle facing the wind direction, so the wind turbine will not be able to face the wind accurately. Therefore, in order to enable the wind turbine to accurately align with the wind load and reduce the influence of the flow load on the semi-active single-point moored floating wind turbine, the present invention proposes a semi-active single-point moored floating wind turbine.

[0036] Please refer to Figures 1 to 3 In the technical solution of this embodiment, a semi-active wind-facing single-point mooring floating wind turbine 100 comprises a floating foundation 1, a wind turbine 2 and an anti-current rudder 3. The floating foundation 1 is used to float in the seawater. The floating foundation comprises at least two columns. Any two adjacent columns are connected by a connecting frame. The columns comprise a first column and at least one second column. A mooring rotor is installed at the bottom end of the first column. The number of the wind turbine is at least one, and the wind turbine is installed at the top end of the second column. The number of the anti-current rudder is at least one, and the anti-current rudder is installed at the bottom end of the second column. The anti-current rudder is used to provide horizontal lift to the second column under the action of the ocean current.

[0037] In the above embodiment, the wind turbine 2 is a device that uses wind energy to convert power. The wind turbine 2 in this embodiment is used to convert offshore wind energy into electrical energy. The wind turbine 2 in this implementation can adopt an existing wind turbine 2.

[0038] In one embodiment, the floating foundation 1 is used to support the wind turbine 2 installed on the top thereof. The floating foundation 1 may include three columns, which are a first column 11 and two second columns 12. Any two adjacent columns are connected by a connecting frame, so that the first column 11 and the two second columns 12 are arranged in a triangle, which can effectively disperse the pressure caused by the waves on the sea surface and enhance the overall anti-overturning ability of the semi-active wind-facing single-point mooring floating wind turbine 100 in this embodiment. The number of wind turbines 2 is two, and the two wind turbines 2 are respectively installed at the tops of the two second columns 12 of the mounting seat. By setting two wind turbines 2, compared with setting one wind turbine 2, the two wind turbines 2 can capture wind energy at the same time, increase the overall power generation capacity of the semi-active wind-facing single-point mooring floating wind turbine 100 in this embodiment, and improve energy production efficiency.

[0039] In other embodiments, the number of the second columns may be one, four, eight or more, and the number of the fans may be one, four, eight or more, which is not limited in the embodiments of this specification.

[0040] In one embodiment, please refer to Figure 2 , the bottom ends of the two second columns 12 are both installed with anti-flow rudders 3, and the large arrows indicate the direction of the flow load 4, wherein the installation direction of the anti-flow rudders 3 can be adjusted according to the actual situation. Assuming Figure 2 The direction of the moderate wind load 5 is from left to right. Assuming that the flow load 4 and the wind load 5 form an angle of ninety degrees, when the anti-current rudder 3 is not set at the bottom of the two second columns 12, the flow load 4 will push the floating foundation 1 to rotate counterclockwise, that is, rotate around the first column 11. The operator can reasonably set the angle of the anti-current rudder 3 at the bottom of the two second columns 12 so that the anti-current rudder 3 set at the upper right generates a lift 6 to the right, and the anti-current rudder 3 set at the lower right generates a lift 6 to the left, so that the anti-current rudder 3 at the bottom of the two second columns 12 forms a torque that pushes the floating foundation 1 to rotate clockwise, so as to prevent the flow load 4 from pushing the floating foundation 1 to rotate counterclockwise, thereby preventing the semi-active single-point moored floating wind turbine 100 from being unable to accurately face the wind due to the influence of the flow load 4.

[0041] In another embodiment, please refer to Figure 3 Assuming that the direction of the wind load 5 is inclined to the upper right at an angle of forty-five degrees, and assuming that the flow load 4 and the wind load 5 are at an angle of forty-five degrees, when the anti-flow rudders 3 are not set at the bottom ends of the two second columns 12, the flow load 4 will push the floating foundation 1 to rotate counterclockwise, that is, rotate around the first column 11. The operator can reasonably set the angles of the anti-flow rudders 3 at the bottom ends of the two second columns 12 so that the anti-flow rudders 3 set at the top generate a rightward lift 6, thereby forming a torque that pushes the floating foundation 1 to rotate counterclockwise, so as to prevent the stop flow load 4 from pushing the floating foundation 1 to rotate counterclockwise, thereby preventing the semi-active wind-facing single-point moored floating wind turbine 100 from being unable to accurately face the wind due to the influence of the flow load 4.

[0042] In combination with the above two embodiments, it can be known that no matter what flow direction the flow load 4 is in, by reasonably setting the angle of the anti-flow rudder 3 at the bottom end of the second column 12, the semi-active wind-facing single-point moored floating wind turbine 100 can generate a lift 6 to resist the flow load 4, thereby preventing the semi-active wind-facing single-point moored floating wind turbine 100 from being unable to accurately face the wind.

[0043] The semi-active single-point moored floating wind turbine 100 of the present embodiment comprises a floating foundation 1, a wind turbine 2 and an anti-current rudder 3. The floating foundation 1 is used to support the wind turbine 2 installed on the top thereof. The floating foundation 1 comprises two second columns 12 and a first column 11. The first column 11 and the two second columns 12 are arranged in a triangle, and each adjacent column is connected by a connecting frame 13 to ensure that the floating foundation 1 has sufficient stability. The wind turbine 2 is arranged at the top of the second column 12, and the anti-current rudder 3 is arranged at the bottom of the second column 12, so that the two anti-current rudders 3 cooperate to generate a lift 6 to resist the flow load 4, thereby enabling the moored floating wind turbine 2 of the present embodiment to reduce the influence of the flow load 4, ensuring that the wind turbine 2 is always aligned with the wind load 5, thereby improving the power production efficiency of the semi-active single-point moored floating wind turbine 100 of the present embodiment.

[0044] In one embodiment, the anti-current rudder 3 can rotate relative to the column. Since the multi-position mooring is converted to a single-point mooring, the freedom of the wind turbine 2 is released, and the bow swing (tail swing) movement of the wind turbine 2 is more obvious when affected by waves. Under the action of the ocean current, the anti-current rudder 3 can provide a horizontal lift 6 to resist the ocean current and support the wind turbine 2 against the wind. The fine-tuning rudder angle that can follow the bow swing rhythm can provide a load opposite to the bow swing to reduce the bow swing movement of the wind turbine 2, thereby increasing the safety, reliability and power generation of the semi-active wind-facing single-point moored floating wind turbine 100 in this embodiment.

[0045] In one embodiment, please refer to Figures 4 to 6 The cross-section of the anti-flow rudder 3 is airfoil-shaped. In this embodiment, the cross-section of the anti-flow rudder 3 is set to be airfoil-shaped, which can increase the lift 6 of the anti-flow rudder 3 and reduce the resistance of the flow load 4, so that the anti-flow rudder 3 can show better stability in the presence of the flow load 4, thereby more effectively resisting the flow load 4.

[0046] In other embodiments, the cross-section of the anti-flow fin 3 may also be a rectangular cross-section, a trapezoidal cross-section, a circular cross-section, a conical cross-section, a flat cross-section, etc., which is not limited in the embodiments of this specification.

[0047] In one embodiment, a sway stabilizer plate 14 is installed at the bottom end of each column, and the cross-section of the sway stabilizer plate 14 along the horizontal direction is larger than the cross-section of the column. In this embodiment, the sway stabilizer plate 14 can be an existing sway stabilizer plate 14. By installing the sway stabilizer plate 14 at the bottom end of the column, the lateral sway of the semi-active wind-facing single-point moored floating wind turbine 100 caused by the flow load 4 and the wind load 5 can be effectively reduced, thereby improving stability. In addition, the sway plate is mounted on the column and its cross-section is larger than the cross-section of the column, which can effectively increase the stability of the structure and reduce the swaying motion.

[0048] Based on the above embodiment, a plurality of reinforcing ribs 141 are connected between the anti-roll plate 14 and the corresponding column, and the plurality of reinforcing ribs 141 are arranged at intervals along the circumference of the column. In this embodiment, by providing a plurality of reinforcing ribs 141 arranged at intervals along the circumference of the column, the connection strength between the column and the anti-roll plate 14 can be improved, and deformation of the anti-roll plate 14 can be prevented.

[0049] Based on the above embodiment, the anti-roll plate 14 is annular. The annular anti-roll plate 14 can evenly distribute the external load and reduce local stress concentration, thereby improving the overall stability. In other embodiments, the anti-roll plate 14 can also be rectangular or triangular.

[0050] In one embodiment, a mooring rotor 15 is further provided at the bottom end of the first column 11, and the first column 11 is rotatably connected to the mooring rotor 15. The mooring rotor 15 is connected to a plurality of mooring cables 16. The end of the mooring cable 16 away from the mooring rotor 15 is used to be fixed to the seabed. In this embodiment, a mooring rotor 15 is provided at the bottom end of the first column 11, and the first column 11 and the mooring rotor 15 can rotate with each other, so that the wind turbine 2 can face the wind through the rotation of the first column 11. The mooring rotor 15 is connected to six mooring cables 16, and the six mooring cables 16 can be anchored on the seabed.

[0051] In one embodiment, the moored rotor 15 is further connected to a cable 17 , and the cable 17 is passed through the moored rotor 15 and the column. The power generated by the two wind turbines 2 can be output to the power grid through the cable 17 .

[0052] In one embodiment, the connecting frame 13 includes a first crossbar 131, a second crossbar 132 and a plurality of connecting rods 133, the first crossbar 131 and the second crossbar 132 are arranged in a vertical interval, the connecting rod 133 is located between the first crossbar 131 and the second crossbar 132 and connects the first crossbar 131 and the second crossbar 132, and the plurality of connecting rods 133 are arranged in an interval along the extension direction of the first crossbar 131. In this embodiment, the plurality of connecting rods 133 arranged between the first crossbar 131 and the second crossbar 132 can improve the overall strength and rigidity of the connecting frame 13, and the design of vertical interval arrangement can increase the overall stability of the semi-active wind-facing single-point mooring floating wind turbine 100, especially under the action of wind load 5 or flow load 4, it can better resist swaying and vibration.

[0053] In one embodiment, a reinforcing rod 134 is connected between any two adjacent first cross bars 131 and any two adjacent second cross bars 132 . The reinforcing rod 134 is provided to further increase the structural strength of the floating foundation 1 .

[0054] In one embodiment, the wind turbine 2 includes a wind blade 21 and a tower 22. The wind blade 21 is installed at the top of the tower 22, and the tower 22 is installed at the top of the second column 12. The tower 22 is used to support and fix the wind blade 21. Installing the wind blade 21 at the top of the tower 22 can improve the wind energy capture capability of the wind turbine 2 and ensure that the wind blade 21 works in a higher wind speed area, thereby improving the power generation efficiency.

[0055] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A semi-active single-point moored floating wind turbine facing the wind, characterized in that: include: A floating foundation, wherein the floating foundation is used to float in seawater, the floating foundation comprises at least two columns, any two adjacent columns are connected by a connecting frame, the columns comprise a first column and at least one second column, and a mooring rotor is installed at the bottom end of the first column; A fan, the number of which is at least one, and the fan is used to be installed at the top of the second column; The anti-current rudder has at least one anti-current rudder, and the anti-current rudder is used to be installed at the bottom end of the second column, and the anti-current rudder is used to provide horizontal lift to the second column under the action of the ocean current.

2. The semi-active wind-facing single-point mooring floating wind turbine according to claim 1, characterized in that: The cross-section of the anti-flow rudder is in the shape of an airfoil.

3. The semi-active wind-facing single-point mooring floating wind turbine according to claim 1, characterized in that: A sway stabilization plate is installed at the bottom end of each column, and the cross section of the sway stabilization plate along the horizontal direction is larger than the cross section of the column.

4. The semi-active wind-facing single-point mooring floating wind turbine according to claim 3, characterized in that: A plurality of reinforcing ribs are connected between the anti-roll plate and the corresponding column, and the plurality of reinforcing ribs are arranged at intervals along the circumference of the column.

5. The semi-active wind-facing single-point mooring floating wind turbine according to claim 3, characterized in that: The anti-roll plate is annular.

6. The semi-active wind-facing single-point mooring floating wind turbine according to claim 1, characterized in that: The mooring rotor is connected to a plurality of mooring cables, and one end of the mooring cables away from the mooring rotor is used for fixing to the seabed.

7. The semi-active wind-facing single-point mooring floating wind turbine according to claim 6, characterized in that: The mooring rotor is also connected to a cable, and the cable is passed through the mooring rotor and the column.

8. The semi-active wind-facing single-point mooring floating wind turbine according to any one of claims 1 to 7, characterized in that: The connecting frame includes a first cross bar, a second cross bar and a plurality of connecting bars, the first cross bar and the second cross bar are arranged at intervals along the vertical direction, the connecting bar is located between the first cross bar and the second cross bar and connects the first cross bar and the second cross bar, and the plurality of connecting bars are arranged at intervals along the extension direction of the first cross bar.

9. The semi-active wind-facing single-point mooring floating wind turbine according to claim 8, characterized in that: A reinforcing rod is connected between any two adjacent first cross bars and any two adjacent second cross bars.

10. The semi-active wind-facing single-point mooring floating wind turbine according to any one of claims 1 to 7, characterized in that: The fan includes a fan blade and a tower, wherein the fan blade is installed at the top of the tower, and the tower is installed at the top of the second column.

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