Floating offshore wind power plant

Abstract

The present application relates to offshore wind power equipment technical field, disclose a floating offshore wind power generation device, including floating foundation, mooring assembly, support assembly, cabin and impeller, the floating foundation is suitable for floating on the sea, one end of mooring assembly is fixed on the seabed, the other end is connected with the floating foundation, the support assembly is set on the top of the floating foundation, the cabin bottom is movably connected with the support assembly, the impeller is rotatably arranged on the side of the cabin, the side of the impeller away from the cabin is movably connected with the support assembly, the present application adopts single point mooring mode, can realize the passive yaw of floating offshore wind power generation device, when the direction of wind and wave is inconsistent with the direction of impeller, it will rotate around the anchor point of mooring assembly on the seabed, realize the passive yaw of floating offshore wind power generation device as a whole, simultaneously cabin and impeller are movably connected with the support assembly, can realize the active yaw of impeller, thereby can accurately wind, improve the power generation efficiency of unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore wind power equipment, in particular to a floating offshore wind power device. BACKGROUND

[0002] The floating wind turbine is a technology that uses a floating structure to support a wind turbine for power generation at sea. Unlike traditional fixed wind turbines, the floating wind turbine can be deployed in deeper and more wind-rich sea areas, significantly improving power generation efficiency.

[0003] In the prior art, the floating wind turbine usually sets the wind turbine on the foundation floating in the sea, and converts wind energy into electric energy through the impeller for power generation. Since the directions of the incoming flow and the waves are not always the same at sea, the floating wind turbine cannot ensure that the impeller always faces the incoming flow direction, thereby failing to maximize the capture of wind energy. SUMMARY

[0004] Therefore, the present application provides a floating offshore wind power device to solve the problem that the floating wind turbine in the prior art cannot ensure that the impeller always faces the incoming flow direction, thereby failing to maximize the capture of wind energy.

[0005] The present application provides a floating offshore wind power device, comprising a floating foundation, a mooring assembly, a support assembly, a nacelle and an impeller. The floating foundation is adapted to float on the sea. One end of the mooring assembly is fixed to the seabed, and the other end is connected to the floating foundation. The support assembly is arranged on the top of the floating foundation. The bottom of the nacelle is movably connected to the support assembly. The impeller is rotatably arranged on the side of the nacelle. The side of the impeller away from the nacelle is movably connected to the support assembly.

[0006] Beneficial effects: The present application adopts a single-point mooring method, which can realize passive yawing of the floating offshore wind power device. When the direction of the wind and waves is inconsistent with the direction of the impeller, the floating offshore wind power device will rotate around the anchor point of the mooring assembly on the seabed to realize passive yawing of the whole device. At the same time, the nacelle and the impeller are movably connected to the support assembly, which can realize active yawing of the impeller, so as to accurately face the wind and improve the power generation efficiency of the unit.

[0007] In an alternative embodiment, a rotating groove is provided at the end of the impeller away from the nacelle, and the support assembly is movably installed in the rotating groove.

[0008] Beneficial effects: The present application provides a rotating groove at the end of the impeller away from the nacelle. When passive yawing of the mooring assembly cannot ensure that the impeller faces the incoming flow direction, the nacelle is rotated to deflect the rotating groove on the impeller and the support assembly by a certain angle, so as to accurately face the wind and improve the power generation efficiency of the unit.

[0009] In an alternative embodiment, the floating offshore wind power generation device further comprises a rotating shaft bearing, and the rotating shaft bearing is rotatably connected with the impeller, and the rotating groove is arranged on the rotating shaft bearing.

[0010] In an alternative embodiment, the support assembly comprises a first support and a second support, one end of the first support is fixedly connected with the floating foundation, the other end of the first support is provided with a connecting portion, the connecting portion is movably arranged in the rotating groove, one end of the second support is fixedly connected with the floating foundation, and the other end of the second support is rotatably connected with the bottom of the nacelle.

[0011] Beneficial effects: When the passive yaw of the mooring assembly cannot ensure that the impeller is perpendicular to the incoming flow, the rotating nacelle makes the rotating groove on the impeller and the connecting portion deflect by a certain angle, so that the impeller can be accurately aligned with the wind, and the power generation efficiency of the unit is improved.

[0012] In an alternative embodiment, the top of the second support is provided with a support platform, and the support assembly further comprises a yaw bearing, and the yaw bearing is movably arranged between the nacelle and the support platform.

[0013] Beneficial effects: When the passive yaw of the mooring assembly cannot ensure that the impeller is perpendicular to the incoming flow, the yaw bearing drives the nacelle to rotate on the support platform, and the nacelle drives the impeller to deflect by a certain angle, so that the impeller can be accurately aligned with the wind, and the power generation efficiency of the unit is improved.

[0014] In an alternative embodiment, the second support comprises a second support rod and a third support rod, one end of the second support rod is connected with the support platform, the other end of the second support rod is connected with the floating foundation, one end of the third support rod is connected with the support platform, and the other end of the third support rod is connected with the floating foundation, and the second support rod, the third support rod and the floating foundation are enclosed to form a triangular frame structure.

[0015] Beneficial effects: The second support rod, the third support rod and the floating foundation are enclosed to form a triangular frame structure in the present application, so that the support assembly has stable support performance, and the overall weight of the floating offshore wind power generation device can be reduced.

[0016] In an alternative embodiment, the floating foundation comprises a plurality of pontoons and connecting rods, the plurality of pontoons are adapted to float on the sea, one end of the mooring assembly is connected with the pontoons, and the connecting rods are connected with adjacent pontoons.

[0017] Beneficial effects: The connecting rods are used to connect the pontoons in the present application, so that the overall weight of the floating offshore wind power generation device can be reduced.

[0018] In an alternative embodiment, the bottom of the pontoon is provided with a ballast tank.

[0019] Beneficial effects: The ballast tank is arranged at the bottom of the pontoon in the present application, so that the draft and the metacentric height of the pontoon can be adjusted to ensure the stability of the floating offshore wind power generation device on the sea.

[0020] In an alternative embodiment, the number of pontoons is three, and the connection rods and the pontoons form a triangular prism structure.

[0021] In an alternative embodiment, the mooring assembly comprises an anchor and a mooring line, the anchor is adapted to be arranged on the seabed, and the mooring line is connected to the anchor at one end and connected to the floating foundation at the other end.

[0022] Beneficial effects: the mooring line single-point mooring method is adopted, passive yaw of the floating offshore wind power device can be realized, when the wind and wave direction is inconsistent with the direction of the impeller, the floating offshore wind power device will rotate around the anchor, and passive yaw of the floating offshore wind power device as a whole is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 Fig. 1 is a perspective view of a floating offshore wind power device according to an embodiment of the present application;

[0025] Figure 2 Fig. 2 is a side view of a cabin and an impeller in a floating offshore wind power device according to an embodiment of the present application;

[0026] Figure 3 Fig. 3 is a front view of a cabin and an impeller in a floating offshore wind power device according to an embodiment of the present application;

[0027] Figure 4 Fig. 4 is a front view of a floating offshore wind power device according to an embodiment of the present application;

[0028] Figure 5 Fig. 5 is a side view of a floating offshore wind power device according to an embodiment of the present application;

[0029] Figure 6 Fig. 6 is a top view of a floating offshore wind power device according to an embodiment of the present application;

[0030] Figure 7 Fig. 7 is a top view of a floating offshore wind power device in a yawing state according to an embodiment of the present application.

[0031] Explanation of reference signs:

[0032] 1. floating foundation; 101. buoy; 102. connecting rod; 103. ballast tank;

[0033] 2. mooring assembly; 201. anchor; 202. mooring line;

[0034] 3. support assembly; 301. first support; 3011. connecting part; 302. second support; 3021. second support rod; 3022. third support rod; 303. support platform;

[0035] 4. engine room;

[0036] 5. impeller; 501. rotating groove; 502. rotating shaft bearing;

[0037] 6. yaw bearing. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] The embodiments of the present application will be described below in conjunction with Figures 1 to 7 .

[0040] According to the embodiments of the present application, as shown in Figures 1 to 7 , a floating offshore wind power device is provided, comprising a floating foundation 1, a mooring assembly 2, a support assembly 3, an engine room 4 and an impeller 5. The floating foundation 1 is adapted to float on the sea. One end of the mooring assembly 2 is fixed to the seabed, and the other end is connected to the floating foundation 1. The support assembly 3 is arranged on the top of the floating foundation 1. The bottom of the engine room 4 is movably connected to the support assembly 3. The impeller 5 is rotatably arranged on the side of the engine room 4. The side of the impeller 5 away from the engine room 4 is movably connected to the support assembly 3.

[0041] Specifically, in the present embodiment, the floating foundation 1 is floatingly arranged on the sea. One end of the mooring assembly 2 is fixed to the seabed, and the other end is connected to the bottom of one side of the floating foundation 1. The bottom of the support assembly 3 is fixed to the top of the floating foundation 1. The bottom of the engine room 4 is movably connected to the top of the support assembly 3. The impeller 5 is rotatably arranged on the side of the engine room 4. The side of the impeller 5 away from the engine room 4 is movably connected to the support assembly 3.

[0042] The application adopts single-point mooring mode, and can realize passive yaw of the floating offshore wind power generation device, when the direction of wind and wave is inconsistent with the direction of the impeller 5, the floating offshore wind power generation device is rotated around the anchor point of the mooring assembly 2 on the seabed, the passive yaw of the whole floating offshore wind power generation device is realized, the cabin 4 and the impeller 5 are movably connected with the supporting assembly 3, the active yaw of the impeller 5 can be realized, so that the wind can be accurately directed, and the power generation efficiency of the unit is improved.

[0043] In one embodiment, as shown in Figure 3 , the end of the impeller 5 away from the cabin 4 is provided with a rotating groove 501, and the supporting assembly 3 is movably installed in the rotating groove 501.

[0044] Specifically, the rotating groove 501 in the embodiment is a horizontally inwardly recessed arc-shaped groove, as shown in Figure 7 , when the impeller 5 needs to be actively yawed, the cabin 4 drives the impeller 5 to rotate in the water x-y plane by a certain angle, and the impeller 5 can rotate in the x-y plane around the supporting assembly 3 within the range of the rotating groove 501.

[0045] The application is provided with the rotating groove 501 at the end of the impeller 5 away from the cabin 4, when the passive yaw of the mooring assembly 2 cannot ensure that the impeller 5 is directed to the wind direction, the cabin 4 is rotated to make the rotating groove 501 on the impeller 5 deflect by a certain angle from the supporting assembly 3, so that the impeller 5 can be accurately directed to the wind, and the power generation efficiency of the unit is improved.

[0046] In one embodiment, as shown in Figure 3 , the floating offshore wind power generation device further comprises a rotating shaft bearing 502, the rotating shaft bearing 502 is rotatably connected with the impeller 5, and the rotating groove 501 is arranged on the rotating shaft bearing 502.

[0047] Specifically, in the embodiment, the impeller 5 and the power generation equipment in the cabin 4 are rotatably connected through a rotating shaft, when the incoming wind blows through the impeller 5, the impeller 5 drives the rotating shaft to rotate to generate electricity, the impeller 5 is rotatably installed on the rotating shaft bearing 502, when the impeller 5 needs to be actively yawed, the cabin 4 drives the impeller 5 to rotate in the water x-y plane, at this time, the rotating shaft bearing 502 rotates around the supporting assembly 3.

[0048] In one embodiment, as shown in Figure 1 , the supporting assembly 3 comprises a first supporting piece 301 and a second supporting piece 302, one end of the first supporting piece 301 is fixedly connected with the floating foundation 1, the other end is provided with a connecting part 3011, the connecting part 3011 is movably installed in the rotating groove 501, one end of the second supporting piece 302 is fixedly connected with the floating foundation 1, and the other end is rotatably connected with the bottom of the cabin 4.

[0049] Specifically, the first support 301 is fixedly connected with the top of the floating foundation 1, the connecting part 3011 at the top of the first support 301 is movably installed in the rotating groove 501, the connecting part 3011 is matched with the rotating groove 501 in shape, the second support 302 is oppositely arranged with the first support 301 on the top of the floating foundation 1, the top of the second support 302 is rotatably connected with the bottom of the cabin 4, when the impeller 5 needs to be actively yawed, the cabin 4 drives the impeller 5 to rotate in the water x-y plane, at this time, the bottom of the cabin 4 rotates around the second support 302, and the rotating shaft bearing 502 rotates around the first support 301.

[0050] When passive yawing of the mooring assembly 2 cannot ensure that the impeller 5 faces the incoming flow wind direction, the cabin 4 is rotated to make the rotating groove 501 on the impeller 5 deflect a certain angle from the connecting part 3011, so that the impeller 5 can accurately face the wind, and the power generation efficiency of the unit is improved.

[0051] In one embodiment, as shown in Figure 1 and Figure 2 The floating offshore wind power generation device further comprises a yawing bearing 6, the top of the second support 302 is provided with a support platform 303, and the yawing bearing 6 is movably arranged between the cabin 4 and the support platform 303.

[0052] Specifically, the yawing bearing 6 comprises a rotating race, a fixed race and a rotating driver in the embodiment, the rotating race is fixedly connected with the bottom of the cabin 4, the fixed race is sleeved in the rotating race, the inner side wall of the fixed race is provided with a first tooth part, the rotating driver is fixedly installed on the cabin 4, the rotating driver is provided with a second tooth part which is meshed with the first tooth part, and the fixed race is fixedly installed on the support platform 303.

[0053] In the embodiment, the gear on the driving end of the bottom of the rotating driver is provided with a second tooth part which is matched with the first tooth part, and the first tooth part is meshed with the second tooth part, through the rotation of the driving end of the rotating driver, the gear is driven to rotate, since the fixed race is fixedly connected with the support platform 303 and does not move, the rotating race is driven to rotate by the first tooth part which is meshed with the second tooth part on the gear, at this time, the cabin 4 drives the impeller 5 to rotate together with the rotating race, so that the impeller 5 is turned to yaw in the water x-y plane.

[0054] When passive yawing of the mooring assembly 2 cannot ensure that the impeller 5 faces the incoming flow wind direction, the yawing bearing 6 drives the cabin 4 to rotate on the support platform 303, the cabin 4 drives the impeller 5 to deflect a certain angle, so that the impeller 5 can accurately face the wind, and the power generation efficiency of the unit is improved.

[0055] In one embodiment, as shown in Figure 1As shown, the second support member 302 comprises a second support rod 3021 and a third support rod 3022, one end of the second support rod 3021 is connected with the support platform 303, the other end is connected with the floating foundation 1, one end of the third support rod 3022 is connected with the support platform 303, the other end is connected with the floating foundation 1, and the second support rod 3021, the third support rod 3022 and the floating foundation 1 enclose a triangular frame structure.

[0056] Specifically, the second support rod 3021, the third support rod 3022 and the floating foundation 1 enclose a triangular frame structure in the embodiment, and enclose an approximately triangular pyramid frame structure with the first support member 301, since the triangle is not easy to deform under stress, the support assembly in the form of triangular pyramid has high stability as a whole, thereby providing stable support for the cabin 4 and the impeller 5.

[0057] The first support member 301, the second support rod 3021 and the third support rod 3022 are not specifically limited in the embodiment, for example, the first support member 301, the second support rod 3021 and the third support rod 3022 are made of steel pipes in the embodiment, and the use of steel pipes for making the support frame can reduce the amount of steel and the production cost.

[0058] The second support rod 3021, the third support rod 3022 and the floating foundation 1 enclose a triangular frame structure in the embodiment, which can make the support assembly 3 have stable support and reduce the weight of the overall floating offshore wind power device.

[0059] In one embodiment, as shown in the drawings, Figure 1 The floating foundation 1 comprises a plurality of pontoons 101 and connecting rods 102, the plurality of pontoons 101 are adapted to float on the sea, one end of the mooring assembly 2 is connected with the pontoon 101, and the plurality of connecting rods 102 connect adjacent pontoons 101.

[0060] Specifically, the frame structure formed by the plurality of pontoons 101 and the connecting rods 102 in the embodiment can not only ensure that the floating offshore wind power device floats on the sea, but also reduce the amount of steel used in the overall device.

[0061] The frame structure formed by the connecting rods 102 connecting the pontoons 101 can reduce the weight of the overall floating offshore wind power device.

[0062] In one embodiment, as shown in the drawings, Figure 1 The pontoon 101 is provided with a ballast tank 103 at the bottom.

[0063] Specifically, the ballast tank 103 is provided at the bottom of each pontoon 101 in the embodiment, and the cross-sectional size of the ballast tank 103 is slightly larger than the cross-sectional size of the pontoon 101.

[0064] The present invention provides a ballast tank 103 at the bottom of the pontoon 101, which can adjust the draft and centering height of the pontoon 101 to ensure the stability of the floating offshore wind power generation device at sea.

[0065] In one embodiment, such as Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, there are three pontoons 101, and the connecting rod 102 and the pontoons 101 form a triangular prism structure.

[0066] Specifically, in this embodiment, there are three pontoons 101, with the sides of adjacent pontoons 101 connected to each other by connecting rods 102, and the sides of each ballast tank 103 also connected by connecting rods 102, thus forming a triangular prism frame structure. Because the triangular prism has good symmetry and balance in its spatial layout, it has strong stability and load-bearing capacity, thereby ensuring the overall safety and stability of the floating offshore wind power generation device.

[0067] In one embodiment, such as Figure 1 As shown, the mooring assembly 2 includes an anchor 201 and a mooring cable 202. The anchor 201 is adapted to be installed on the seabed, and one end of the mooring cable 202 is connected to the anchor 201, while the other end is connected to the floating foundation 1.

[0068] Specifically, in this embodiment, the anchor 201 is fixed to the seabed, one end of the mooring cable 202 is connected to the anchor 201, and the other end is connected to the bottom of one of the ballast tanks 103.

[0069] The present invention adopts a single-point mooring method using mooring cable 202, which can realize passive yaw of the floating offshore wind power generation device. When the wind and wave direction is inconsistent with the direction of the rotor 5, the floating offshore wind power generation device will rotate around the anchor 201, realizing the overall passive yaw of the floating offshore wind power generation device.

[0070] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A floating offshore wind power generation device, characterized in that, include: A floating base (1) is adapted to float at sea; The mooring assembly (2) adopts a single-point mooring method, with one end fixed to the seabed and the other end connected to the floating foundation (1); Support component (3), which is disposed on top of the floating base (1); The cabin (4) is movably connected to the support assembly (3) at its bottom. Impeller (5), the impeller (5) is rotatably disposed on the side of the nacelle (4), the side of the impeller (5) away from the nacelle (4) is movably connected to the support assembly (3), the end of the impeller (5) away from the nacelle (4) is provided with a rotating groove (501), and the support assembly (3) is movably installed in the rotating groove (501); A rotating shaft bearing (502) is rotatably connected to the impeller (5), and a rotating groove (501) is provided on the rotating shaft bearing (502); The support component (3) includes: The first support member (301) has one end fixedly connected to the floating foundation (1) and the other end provided with a connecting part (3011), which is movably installed in the rotating groove (501); The second support member (302) is fixedly connected at one end to the floating foundation (1) and rotatably connected at the other end to the bottom of the cabin (4).

2. The floating offshore wind power generation device according to claim 1, characterized in that, The second support member (302) has a support platform (303) on its top, and also includes: Yaw bearing (6), which is movably disposed between the engine room (4) and the support platform (303).

3. The floating offshore wind power generation device according to claim 2, characterized in that, The second support member (302) includes: The second support rod (3021) has one end connected to the support platform (303) and the other end connected to the floating foundation (1); The third support rod (3022) is connected at one end to the support platform (303) and at the other end to the floating foundation (1). The second support rod (3021), the third support rod (3022) and the floating foundation (1) form a triangular frame structure.

4. The floating offshore wind power generation device according to claim 1, characterized in that, The floating foundation (1) includes: A number of buoys (101) are adapted to float on the sea, and one end of the mooring assembly (2) is connected to the buoys (101); Linkage (102), a plurality of linking rods (102) connect adjacent floats (101).

5. The floating offshore wind power generation device according to claim 4, characterized in that, The bottom of the pontoon (101) is provided with a ballast tank (103).

6. The floating offshore wind power generation device according to claim 4 or 5, characterized in that, The number of pontoons (101) is three, and the connecting rod (102) and the pontoons (101) form a triangular prism structure.

7. The floating offshore wind power generation device according to claim 1, characterized in that, The mooring assembly (2) includes: Anchor (201), said anchor (201) being adapted to be installed on the seabed; The mooring cable (202) is connected at one end to the anchor (201) and at the other end to the floating foundation (1).

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