Lightweight floating type double-fan foundation device capable of facing wind towards waves

Abstract

The utility model discloses a light-weight floating type double-fan foundation device capable of facing wind towards waves. Belongs to the technical field of ocean engineering, and comprises two buoyancy tanks, a floating pile and a triangular truss structure, fans are placed on the buoyancy tanks, the two fans comprise fan wind wheels and fan tower drums, the fan wind wheels are partially overlapped, and the triangular truss structure is connected with the buoyancy tanks and the floating pile respectively. According to the utility model, the distance between the two fan tower barrels and the two floating boxes is reduced, so that the main scale of the floating body structure is minimized, and the structure is light; the design of the slender buoyancy tanks is adopted, and the buoyancy tanks can face waves and flow in the wave and flow direction to keep the minimum wave flow load of the buoyancy tanks, so that the requirement that a fan needs to be assembled through a deepwater wharf is avoided, the buoyancy tanks can be rotated to enable the foundation to directly abut against the shore to install the fan, and a jetty wharf is not needed; high requirements of deepwater, jetty and the like on a fan assembly wharf are not required, so that the logistics and assembly cost derived from the wharf can be greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of marine engineering and relates to a lightweight floating double-wind turbine foundation device capable of facing waves and wind. Background Art

[0002] Judging from the availability of wind resources and sea areas, deep-sea wind power has enormous potential, and the move of wind power to deep-sea is inevitable. With the large-scale development of offshore wind farms, the sea area available for both nearshore and offshore wind farms will become increasingly scarce. Developing deep-sea offshore wind farms can alleviate this shortage while also enabling efficient use of abundant deep-sea wind resources. From an economic perspective, floating wind power has commercial feasibility, but cost reduction and efficiency improvement remain the primary focus of deep-sea floating wind power development. The key areas for cost reduction and efficiency improvement include: i) strategies for conserving sea area: generating maximum wind power with minimal sea area; and ii) innovative designs for the three most costly aspects of floating wind power: the turbine support structure, mooring system, and installation and towing.

[0003] In terms of saving seawater, compared with a single wind turbine foundation, the dual wind turbine foundation of the present invention can save the number of wind turbine foundations and the cost of expensive cables; at the same time, it significantly improves the efficiency of seawater utilization, thus solving the problem of high cost or even inability to obtain sufficient seawater.

[0004] In terms of innovative cost-reduction design for the floating structure (wind turbine support structure), this utility model minimizes the distance between the two wind turbine towers and the two pontoons by partially overlapping the two wind turbine rotors and designing tilted wind turbine towers, thereby minimizing the main dimensions of the floating structure and reducing its structural weight. To reduce costs for the mooring system, this utility model utilizes a slender pontoon design that can face waves and currents to maintain minimum wave and current loads, thereby reducing mooring system costs. Regarding installation and transportation costs, the slender pontoons described in this utility model have low towing resistance and can be towed by low-horsepower tugboats, thus reducing costs. Furthermore, the use of slender pontoons significantly reduces the draft of the floating foundation, eliminating the need for deep-water docks for wind turbine assembly. Furthermore, the rotatable pontoons allow the foundation to be directly docked for wind turbine installation, eliminating the need for piers. Eliminating the high requirements for deep-water docks and piers for wind turbine assembly significantly reduces dock-related logistics and assembly costs. Summary of the Invention

[0005] In response to the above problems, the purpose of this utility model is to propose a cost-reducing and efficiency-enhancing design for deep-sea floating wind turbines (a lightweight floating dual-wind turbine foundation device that can face waves and wind), which not only improves the efficiency of offshore sea use but also reduces the cost of wind turbine supporting floating structure, mooring system, installation and towing.

[0006] The technical solution of the utility model is: the utility model is a lightweight floating double wind turbine foundation device capable of facing waves and wind, comprising a floating foundation, the floating foundation comprising a first pontoon, a second pontoon, floating piles and a triangular truss structure,

[0007] The floating foundation is composed of a first pontoon, a second pontoon, floating piles, and a triangular truss structure connecting the first pontoon, the second pontoon and the floating piles.

[0008] Furthermore, a floating pile cavity is opened at the center of the floating pile, and a bearing pile 1 is inserted into the floating pile cavity.

[0009] Furthermore, a cavity is opened at the center of the first pontoon and the second pontoon, and a second bearing pile is inserted into the cavity.

[0010] Furthermore, a first fan and a second fan are respectively installed on the upper ends of the corresponding pontoon 1 and pontoon 2 on the floating foundation.

[0011] Furthermore, the first wind turbine includes a wind turbine rotor 1 and a wind turbine tower 1 connected to each other;

[0012] The second wind turbine includes a second wind turbine rotor and a second wind turbine tower which are connected to each other.

[0013] Furthermore, the two wind turbine rotors and wind turbine towers placed on the two pontoons are partially overlapped.

[0014] The wind turbine tower adopts an inclined tower design;

[0015] The distance between the hubs of the two wind turbine rotors ranges from 0.525D to 1.0D, where D is the rotor diameter.

[0016] Furthermore, the two wind turbine rotors may be placed overlappingly as i) side by side in the same plane or ii) placed front to back and not in the same plane; for the case ii) of not being placed in the same plane, the plane distance between the two wind turbine rotors should not exceed 1.1 times the widest chord length of the wind turbine blades.

[0017] Furthermore, the first wind turbine and the second wind turbine rotate in opposite directions at the same speed under normal power generation conditions.

[0018] Furthermore, the triangular truss structure has an outer shape of an isosceles triangle, the vertices of the two sides of the isosceles triangle are respectively connected to the pontoon 1 and the pontoon 2, and the other vertex is connected to the floating pile;

[0019] The triangular truss structure can rotate around the floating pile;

[0020] The first pontoon and the second pontoon can rotate around the vertices of the two sides of the isosceles triangle.

[0021] Furthermore, the positioning of the floating pile is achieved by single point mooring;

[0022] The first pontoon and the second pontoon are both designed to be slender.

[0023] The beneficial effects of the present invention are as follows: in the cost-reducing design of the floating body (wind turbine supporting structure), the present invention minimizes the distance between the two wind turbine towers and the two pontoons by arranging the two wind turbine rotors to overlap partially and designing the inclined wind turbine towers, thereby minimizing the main dimensions of the floating body structure and achieving lightweight structure. As a cost-reducing measure for the mooring system, the present invention adopts a slender pontoon design and the pontoon can face the waves and currents according to the direction of the waves and currents to maintain the minimum wave and current load of the slender pontoon, thereby reducing the cost of the mooring system. The cost of the mooring system; in terms of cost reduction in installation and towing, the slender pontoon described in the utility model has less towing resistance and can be towed by a smaller horsepower tugboat, thereby reducing costs; and the use of the slender pontoon can significantly reduce the draft of the floating foundation, thereby avoiding the need for deep-water docks to assemble wind turbines. The pontoon can also be rotated to enable the foundation to be directly docked to install the wind turbine, without the need for a pier; not having high requirements for deep water, piers, etc. for the wind turbine assembly pier will greatly reduce the logistics and assembly costs derived from the pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the floating pile in the utility model;

[0026] Figure 3 It is a structural diagram of the buoyancy box in the utility model;

[0027] Figure 4 This is a schematic diagram of the overlapping arrangement of the first fan and the second fan in the first fan and the second fan in the present invention;

[0028] Figure 5 This is a schematic diagram of the constant speed reverse rotation of the fan in normal power generation conditions in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the operation of the pontoon 1 and pontoon 2 facing the waves and the wind turbine facing the wind in the utility model;

[0030] Figure 7 This is a schematic diagram of the installation and operation of the wind turbine terminal in the utility model;

[0031] In the figure: 11 is a floating foundation;

[0032] 111 is a triangular truss structure.

[0033] 112 is a buoyancy box 1, 1111 is a bearing pile 2, and 1121 is a cavity;

[0034] 113 is pontoon 2;

[0035] 12 is the first wind turbine, 121 is the wind turbine rotor 1, 122 is the wind turbine tower 1;

[0036] 13 is the second wind turbine, 131 is the second wind turbine rotor, 132 is the second wind turbine tower;

[0037] 14 is a floating pile, 114 is a bearing pile 1, and 141 is a floating pile cavity. DETAILED DESCRIPTION

[0038] The specific technical solutions of the present invention are further described in detail below with reference to specific examples.

[0039] As shown in the figure, the present invention describes a lightweight floating dual-wind turbine foundation device that can face waves and wind. The floating foundation 11 is composed of two pontoons (pontoon 1 112, pontoon 2 113), floating piles 14, and a triangular truss structure 111 connecting the two pontoons (pontoon 1 112, pontoon 2 113) and the floating piles 14. One wind turbine (a first wind turbine 12 and a second wind turbine 13) is placed on each of the two pontoons (pontoon 1 112, pontoon 2 113).

[0040] Furthermore, the wind turbine rotors (wind turbine rotor 1 121 and wind turbine rotor 2 131 ) placed on the two pontoons (pontoon 1 112 and pontoon 2 113 ) are partially overlapped, and the wind turbine towers (wind turbine tower 1 122 and wind turbine tower 2 132 ) adopt an inclined tower design.

[0041] Furthermore, the wind turbine wheels (the first wind turbine wheel 121 and the second wind turbine wheel 131) are placed in an overlapping manner, and the distance between the hubs of the two wind turbine wheels is in the range of 0.525D - 1.0D, where D is the diameter of the wind turbine wheel.

[0042] Furthermore, the overlapping placement of the fan rotors (fan rotor 1 121, fan rotor 2 131) can be i) side by side in the same plane or ii) placed front and back and not in the same plane; for the case ii) of not being placed in the same plane, the plane distance between the two rotors (fan rotor 1 121, fan rotor 2 131) should not exceed 1.1 times the widest chord length of the fan blade.

[0043] Furthermore, the wind turbine rotors (wind turbine rotor 1 121 and wind turbine rotor 2 131 ) rotate in opposite directions at a constant speed under normal power generation conditions.

[0044] Furthermore, the triangular truss structure 111 is an isosceles triangle in top view, with the vertices of the two sides of the isosceles triangle connected to the pontoons (pontoon 1 112 and pontoon 2 113) respectively, and the other vertex connected to the floating pile 14;

[0045] The triangular truss structure 111 can rotate around the floating pile 14 so that the two wind turbines face the incoming wind;

[0046] At the vertices of the two sides of the triangle, the pontoons (pontoon 1 112 and pontoon 2 113) can rotate around the vertices to cope with waves and currents.

[0047] Furthermore, the positioning of the floating pile 14 is achieved through single-point mooring.

[0048] Furthermore, the pontoons (pontoon 1 112, pontoon 2 113) are designed to be slender. Example

[0049] This embodiment provides an application of a cost-reduction and efficiency-enhancing design for a deep-sea floating wind turbine.

[0050] As shown in the figure, the floating dual wind turbine structure (floating foundation 1, first wind turbine 12 and second wind turbine 13) (such as Figure 1-3 As shown), the fan rotors (fan rotor 1 121, fan rotor 2 131) are arranged in an overlapping manner so that the size of the foundation supporting the fan can be greatly reduced, thereby achieving lightweighting of the fan foundation.

[0051] The floating dual-wind turbine structure includes a floating foundation 11 for supporting the wind turbines, a first wind turbine 12 and a second wind turbine 13 thereon, and floating piles 14 for realizing the positioning function of the floating foundation 11 .

[0052] The wind turbine rotors (wind turbine rotor 1 121 and wind turbine rotor 2 131 ) placed on the two pontoons (pontoon 1 112 and pontoon 2 113 ) are partially overlapped, and the wind turbine towers (wind turbine tower 1 122 and wind turbine tower 2 132 ) adopt an inclined tower design.

[0053] The two wind turbine rotors are placed overlapping, and the distance l between the hubs of the two wind turbines (the first wind turbine rotor 121 and the second wind turbine rotor 131) is in the range of 0.525D - 1.0D, where D is the diameter of the wind turbine rotor.

[0054] One of the multiple types of overlapping wind turbine rotors may be that the two wind turbine rotor planes (wind turbine rotor 1 121 and wind turbine rotor 2 131) are not placed in the same plane in front and back; here, the distance b between the two wind turbine rotor planes should not exceed 1.1 times the widest chord length of the wind turbine blade.

[0055] The wind turbine wheels are placed in an overlapping manner, and the two wind turbines rotate in opposite directions at a constant speed under normal power generation conditions.

[0056] The triangular truss structure 111 is shaped like an isosceles triangle when viewed from above. The vertices of the two sides of the isosceles triangle are respectively connected to pontoons (pontoon 1 112 and pontoon 2 113 ) and the other vertex is connected to the floating pile 14 .

[0057] The connection between the triangular truss structure 111 and the floating pile 14 is provided with a bearing pile 114 embedded in the floating pile cavity 141 for the bow to rotate, and rollers are installed on the cavity wall and bottom.

[0058] For the floating pile 14, the triangular truss structure 111 can rotate around it so that the two wind turbines face the incoming wind and generate electricity efficiently; and at the vertices of the two sides of the triangle, the pontoons (pontoon 112 and pontoon 2 113) can rotate around the vertices to respond to waves and currents.

[0059] The connection between the triangular truss structure 111 and the pontoon is provided with a bearing pile 2 1111) embedded in a cavity 1121 in the middle of the pontoon; in order to enable the pontoon to rotate around the bearing pile 2 1111, rollers are installed on the cavity wall and bottom.

[0060] The positioning of the floating pile 14 is achieved through single point mooring.

[0061] The buoyancy box is designed to be slender, and the buoyancy box can face the waves and currents according to the direction of the waves and currents to maintain the minimum wave and current load of the slender buoyancy box, thereby reducing the cost of the mooring system.

[0062] In terms of cost reduction in installation and towing, the slender pontoon described in the utility model has less towing resistance and can be towed by a smaller horsepower tugboat, thereby reducing costs; and through the use of the slender pontoon, the draft of the floating foundation 11 can be significantly reduced, thereby avoiding the need to rent a deep-water dock to assemble the wind turbine, and the installation cost is reduced.

[0063] The rotatable pontoons allow the foundation to be installed directly ashore, eliminating the need for a pier. Because the wind turbine towers and foundations are aligned close to the pier, the two turbine components can be installed alternately, reducing time-consuming ballast water adjustments, lowering installation costs, and improving timeliness.

Claims

1. A lightweight floating dual-wind turbine foundation device capable of facing waves and wind, characterized in that: The floating foundation (11) includes a first pontoon (112), a second pontoon (113), floating piles (14) and a triangular truss structure (111). The floating foundation (11) is composed of a pontoon (112), a pontoon (113), a floating pile (14), and a triangular truss structure (111) connecting the pontoon (112), the pontoon (113) and the floating pile (14); A floating pile cavity (141) is provided at the center of the floating pile (14), and a bearing pile (114) is inserted into the floating pile cavity (141).

2. A lightweight floating dual-wind turbine foundation device capable of facing waves and wind according to claim 1, characterized in that: A cavity (1121) is provided at the center of the first pontoon (112) and the second pontoon (113), and a second bearing pile (1111) is inserted into the cavity (1121).

3. The lightweight floating dual-wind turbine foundation device capable of facing waves and wind according to claim 1 is characterized in that: A first fan (12) and a second fan (13) are respectively arranged on the floating foundation (11) at the upper ends of the corresponding pontoon 1 (112) and the pontoon 2 (113); The first wind turbine (12) comprises a wind turbine rotor (121) and a wind turbine tower (122) connected to each other; The second wind turbine (13) comprises a second wind turbine wheel (131) and a second wind turbine tower (132) which are connected to each other.

4. The lightweight floating dual-wind turbine foundation device capable of facing waves and wind according to claim 3 is characterized in that: The two wind turbine rotors and wind turbine towers placed on the two pontoons are partially overlapped. The wind turbine tower adopts an inclined tower design; The distance between the hubs of the two wind turbine rotors ranges from 0.525D to 1.0D, where D is the diameter of the rotor; The two wind turbine rotors may be placed overlappingly as i) side by side in the same plane or ii) placed front to back but not in the same plane; for the case ii) of not being placed in the same plane, the distance between the two wind turbine rotors should not exceed 1.1 times the widest chord length of the wind turbine blades.

5. The lightweight floating dual-wind turbine foundation device capable of facing waves and wind according to claim 3 is characterized in that: The first fan (12) and the second fan (13) rotate in opposite directions at a constant speed in normal power generation conditions.

6. The lightweight floating dual-wind turbine foundation device capable of facing waves and wind according to claim 1, characterized in that: The triangular truss structure (111) has an outer shape of an isosceles triangle, the vertices of the two sides of the isosceles triangle are respectively connected to the pontoon 1 (112) and the pontoon 2 (113), and the other vertex is connected to the floating pile (14). The triangular truss structure (111) can rotate around the floating pile (14); The buoyancy box 1 (112) and the buoyancy box 2 (113) can rotate around the vertices at the two sides of the isosceles triangle.

7. The lightweight floating dual-wind turbine foundation device capable of facing waves and wind according to claim 1, characterized in that: The positioning of the floating pile (14) is achieved by single-point mooring; The pontoon 1 (112) and the pontoon 2 (113) are both slender in design.

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