Angle adjusting type elastic mooring shared floating type draught fan foundation array

Abstract

The invention discloses an angle adjusting type elastic mooring shared floating type draught fan foundation array. The angle adjusting type elastic mooring shared floating type draught fan foundation array is formed by connecting floating type draught fan foundations. The floating type draught fan foundation comprises a draught fan tower barrel, an upper-layer floating barrel, a truss, a lower-layer mooring winch barrel, a lower-layer draught fan hollow pile, a fixed static mooring cable and a shared anchor point. The lower-layer fan hollow pile comprises a lifting plate, a hydraulic rod and a hydraulic device; the lower-layer mooring winch cylinder comprises a hollow cabin, an elastic cabin and a winch cabin, and a pressing plate and an elastic device are arranged in the elastic cabin; a first electric capstan and a second electric capstan are arranged in the capstan cabin, and the first electric capstan and the second electric capstan drive the adjacent lower-layer fan hollow piles to rotate through the length difference between the first power mooring rope and the second power mooring rope so as to change the angle of the fan tower drum. According to the invention, the influence caused by a severe marine environment is reduced by descending the fan tower drum and elastic buffering; the angle of the fan is adjusted through the power mooring rope, and the power generation efficiency of the floating fan is improved.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering, and in particular to a shared floating wind turbine foundation array with angle-adjustable elastic mooring. Background Art

[0002] Offshore floating wind turbines can adapt to deep-water environments, have advantages such as stable power generation and high wind energy utilization, and have broad application prospects. However, compared with fixed wind turbines, floating wind turbines are subject to very complex loads such as wind, waves and currents, which poses a huge challenge to the wind turbine foundation and its mooring system.

[0003] When the offshore floating wind turbine system is working, it will be subject to loads such as aerodynamic loads, hydrodynamic loads, and seabed soil loads. At the same time, the deep sea has a more complex and harsh marine environment. These factors will have a serious negative impact on the floating wind turbine. Faced with the challenges of offshore floating wind turbine platform operations, the industry is urgently seeking research and development and innovation in marine engineering and technical equipment to improve the operating efficiency of wind turbine platforms, ensure operational safety, and reduce operating costs.

[0004] At present, there are new types of offshore floating wind turbine foundations that use single-point mooring systems. Although this reduces the number of mooring cables and reduces mooring costs, it places higher requirements on the reliability of the single-point mooring system in terms of "automatic wind orientation", especially the transient changes in the tension of the mooring cables caused by the large movement of the floating offshore wind turbines during dynamic wind orientation, and the ultimate strength of the mooring cables under extreme working conditions.

[0005] At the same time, although the offshore floating wind turbine foundation currently using multi-point mooring can rely on the restoring force provided by multiple moorings to offset the external factors of the wind turbine, the design cost, installation complexity and maintenance complexity of the platform are very huge, which is not conducive to improving the competitiveness of the wind power industry in the future energy market. In addition, the effect of maintaining the stability of offshore floating wind turbines only through multi-point mooring in the harsh deep water environment is not ideal, and cannot meet the performance requirements of floating wind turbines in deep sea areas.

[0006] Therefore, from the perspective of technical thinking and economic factors, the technology of offshore floating wind power will inevitably develop in a comprehensive way around how to improve the stability of the platform and reduce the cost of the platform. Among them, the purpose of improving the stability of the platform or reducing the movement of the platform is to improve the overall performance and reliability of the system; the purpose of reducing the cost of manufacturing, installation and maintenance is to make the floating wind turbine platform more economically competitive with other forms of energy.

[0007] In view of the technical problems of poor platform safety and stability and high economic cost in the existing technology, how to improve the safety and stability of the platform through structure, and at the same time form a floating wind turbine foundation array that shares the anchor foundation and controls each other to face the wind, improve the power generation efficiency of offshore floating wind turbines, and reduce mooring costs, is a technical problem that needs to be solved urgently. Summary of the invention

[0008] Purpose of the invention: In order to overcome the technical problems of insufficient platform safety and stability, low efficiency, and high economic cost in the prior art, the present invention proposes a shared floating wind turbine foundation array with angle-adjustable elastic mooring, which reduces the impact of harsh marine environment by lowering the wind turbine tower, adjusting the angle of the floating wind turbine foundation and the windward surface and elastic buffer. Specifically, by adopting the tower of the lower wind turbine hollow pile and the elastic cabin of the lower mooring winch, the force performance is improved in the form of lowering the wind turbine tower and elastic buffer, thereby improving the safety and stability of the platform; at the same time, by adopting the electric winch of the lower mooring winch and the shared anchor point design of the regular hexagonal arrangement, a regular hexagonal floating wind turbine foundation array that shares the anchoring foundation and controls the windward side of each other is formed, thereby improving the power generation efficiency, economy, safety and stability and service life of the floating wind turbine, reducing the mooring cost, and improving the bearing capacity and recoverability of the mooring system.

[0009] Technical solution: The angle-adjustable elastically moored shared floating wind turbine foundation array of the present invention is composed of floating wind turbine foundations connected together; the floating wind turbine foundation includes a wind turbine tower, an upper buoy, a truss, a lower mooring winch, a lower wind turbine hollow pile, a fixed static mooring cable and a shared anchor point;

[0010] The wind turbine tower is sleeved with a circumferential support ring; the upper buoys are arranged around the wind turbine tower in an equilateral triangle, the bottom of the upper buoys is connected to the shared anchor point through a fixed static mooring cable, and the middle of the upper buoys is connected to the adjacent upper buoys, the circumferential support ring and the lower mooring winch through a truss;

[0011] The lower wind turbine hollow pile includes a lifting plate, a hydraulic rod and a hydraulic device; the wind turbine tower is fixed above the lifting plate, and the hydraulic device drives the lifting plate and the wind turbine tower to move through the hydraulic rod;

[0012] The lower mooring winch includes a hollow cabin, an elastic cabin and a winch cabin, a first power hole is opened between the elastic cabin and the winch cabin; a pressure plate and an elastic device are arranged in the elastic cabin; the pressure plate is an arc-shaped rigid plate with a second power hole, and the elastic device is located between the arc-shaped convex surface of the pressure plate and the inner wall of the lower mooring winch; a third power hole is opened at the bottom of the lower mooring winch;

[0013] The winch cabin contains a first electric winch and a second electric winch, a first power mooring cable is wound around the first electric winch, and a second power mooring cable is wound around the second electric winch; one end of the first power mooring cable and the second power mooring cable pass through the first power hole into the elastic cabin, pass through the second power hole of the pressure plate, and then pass through the outer side of the pressure plate and the third power hole of the lower mooring winch, and are connected to the adjacent lower wind turbine hollow pile;

[0014] The first electric winch and the second electric winch drive the adjacent wind turbine hollow piles to rotate through the length difference between the first power mooring cable and the second power mooring cable to change the angle of the wind turbine tower (1) on the adjacent wind turbine hollow piles.

[0015] A cable buckle connecting the first power mooring cable and the second power mooring cable is provided at the bottom of the hollow pile of the lower layer wind turbine.

[0016] The lower mooring winches are arranged in an equilateral triangle around the wind turbine tower.

[0017] The upper part of the upper buoy is a hollow component, and the lower part is a reinforced concrete structure, which provides buoyancy for the entire wind turbine foundation.

[0018] The pressing plate is an arc-shaped rigid plate with two second power holes.

[0019] The spring device is a spring array arranged between the arc-shaped convex surface of the pressure plate and the inner wall of the lower mooring winch.

[0020] The floating wind turbine foundations are arranged in a regular hexagon to form a floating wind turbine foundation array, which improves the stability and economy of the floating wind turbine.

[0021] The shared anchor point is located at the center of the array of floating wind turbine foundations.

[0022] The horizontal angle between the lower mooring winch and the upper buoy is 60°, and they are arranged in a triangle around the wind turbine tower.

[0023] The hollow tank is a hollow sealed body located above the elastic tank and the winch tank, which provides buoyancy for the lower mooring winch.

[0024] Working principle: The bottom end of the wind turbine tower in the angle-adjustable elastically moored shared floating wind turbine foundation array of the present invention is connected to the hollow pile of the lower wind turbine, so as to control the wind turbine tower to fall into the hollow pile of the lower wind turbine; the upper buoys are equidistantly arranged around the wind turbine tower, and the bottom is connected to the shared anchor point by a fixed static mooring cable, and the upper cylinder body is connected to the adjacent upper buoys, the wind turbine tower and the lower mooring winch by a truss; the lower mooring winch is rigidly connected to the hollow pile of the lower wind turbine, and contains an elastic cabin and a winch cabin inside, which provide elastic restoring force for the wind turbine foundation, and at the same time, the lower mooring winch is connected to other adjacent lower wind turbine piles by a power mooring cable to form a wind turbine foundation array for controlling the angle of each wind turbine foundation.

[0025] Beneficial effects: Compared with the prior art, the angle-adjustable elastically moored shared floating wind turbine foundation array of the present invention has the following advantages:

[0026] (1) The present invention adopts a lower layer of wind turbine hollow piles and utilizes a hydraulic device to move the wind turbine tower up and down. When encountering extreme weather such as typhoons, the wind turbine tower moves downward back into the lower layer of wind turbine hollow piles, thereby lowering the center of gravity of the wind turbine foundation, thereby ensuring the structural safety of the wind turbine tower and enhancing the stability of the floating wind turbine foundation, so that the wind turbine foundation can operate smoothly in a complex and harsh deep-sea environment.

[0027] (2) The present invention adopts an elastic cabin design for the lower mooring winch. Through the pressure plate and elastic device in the elastic cabin, it can effectively help the mooring cable absorb impact force, enhance the elastic restoring force of the mooring cable, and improve the safety and stability of the mooring system.

[0028] (3) The present invention adopts a winch cabin design for the lower mooring winch. The length of the power mooring cable is adjusted through the electric winch in the winch cabin. The lengths of the two power mooring cables connected to the adjacent lower wind turbine hollow piles are different, which in turn drives the wind turbine hollow piles to rotate and move, thereby changing the angle of the upper wind turbine tower. Under normal working conditions, the wind turbine blades are located on the windward side to the greatest extent, thereby improving the power generation efficiency of the floating wind turbine and extending its service life.

[0029] (4) The floating wind turbine foundation of the present invention adopts a regular hexagonal arrangement, which optimizes the coverage of a large area and reduces overlapping and blank areas, so that the wind turbine foundation array has a higher space utilization rate, facilitates increasing or reducing the scale of the entire wind turbine array, and simplifies the design and layout costs.

[0030] (5) The upper buoy of the present invention is connected to a shared anchor point at the center of a regular hexagon through a fixed static mooring cable, which improves the installation and maintenance efficiency of the mooring system and optimizes the load distribution of the mooring system, so that each anchor point and mooring equipment bears a reasonable load, thereby improving the stability and economy of the floating wind turbine and enhancing the competitiveness of the wind power industry in the future energy market. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the floating wind turbine foundation in the present invention;

[0032] Figure 2 A top view of the floating wind turbine foundation structure of the present invention;

[0033] Figure 3 It is a cross-sectional view of the hollow pile of the lower fan of the present invention;

[0034] Figure 4 It is a schematic diagram of the lifting and lowering of the wind turbine tower of the present invention;

[0035] Figure 5 It is a front cross-sectional view of the lower mooring winch of the present invention;

[0036] Figure 6 A side cross-sectional view of a lower mooring winch of the present invention;

[0037] Figure 7 A top cross-sectional view of a lower mooring winch of the present invention;

[0038] Figure 8 It is a schematic diagram of the internal structure of the lower mooring winch of the present invention;

[0039] Fig. 9 It is a schematic diagram of the foundation connection of the fan of the present invention;

[0040] Fig.10 A schematic diagram of a shared floating wind turbine foundation array with elastic controllable mooring according to the present invention. Fig.11 This is a schematic diagram of the distribution of the elastically controllable moored shared floating wind turbine foundation array of the present invention. DETAILED DESCRIPTION

[0041] like Figures 1 to 10 As shown, the angle-adjustable elastically moored shared floating wind turbine foundation array of the present invention is composed of floating wind turbine foundations connected together; the floating wind turbine foundation includes a wind turbine tower 1, a support ring around the tower 2, an upper buoy 3, a truss 4, a lower mooring winch 5, a lower wind turbine hollow pile 6, a fixed static mooring cable 7, a dynamic mooring cable 8 and a shared anchor point 9. The floating wind turbine foundations are arranged in a regular hexagon, and the shared anchor point 9 is located at the center of the polygon.

[0042] The bottom end of the wind turbine tower 1 is connected to the lower wind turbine hollow pile 6, and the cylinder of the wind turbine tower 1 is reinforced and supported by the cylinder circumferential support ring 2; the inside of the cylinder circumferential support ring 2 is in contact with the wind turbine tower 1, and the outside of the cylinder circumferential support ring 2 is connected and fixed to the upper buoy 3 through a truss 4.

[0043] The upper part of the upper buoy 3 is a hollow member, and the lower part is a reinforced concrete structure. It is arranged in an equilateral triangle around the wind turbine tower 1 to provide buoyancy for the entire wind turbine foundation. The bottom of the upper buoy 3 is connected to the shared anchor point 9 through a fixed static mooring cable 7, and the middle part is connected to the adjacent upper buoy 3, the circumferential support ring 2 and the lower mooring winch 5 through a truss 4.

[0044] The arrangement of the lower mooring winch 5 is the same as that of the upper buoy 3, and the angle between the lower mooring winch 5 and the upper buoy 3 is 60 degrees; in this embodiment, the angle between the lower mooring winch 5 and the upper buoy 3 is 60 degrees, and they are arranged equidistantly around the wind turbine tower 1 in an equilateral triangle, rigidly connected to the lower wind turbine hollow pile 6, and connected to the adjacent lower mooring winch 5 and the upper buoy 3 through the truss 4, that is, a floating wind turbine foundation is formed by the wind turbine tower 1, the upper buoy 3, the lower mooring winch 5, and the lower wind turbine hollow pile 6 connected to each other through the truss 4. At the same time, it is connected to the cable buckle 13 at the bottom of the adjacent lower wind turbine hollow pile 6 through the power mooring cable 8. The angle between the lower mooring winch 5 and the upper buoy 3 is 60 degrees, and the length and angle of the truss used to connect the same lower mooring winch are equal, and the force is evenly applied to avoid eccentric torque.

[0045] like Figure 3 and Figure 4 As shown, the lower wind turbine hollow pile 6 comprises a lifting plate 10, a hydraulic rod 11, a hydraulic device 12 and a cable buckle 13. The hydraulic device 12 is located at the inner bottom end of the lower wind turbine hollow pile 6, and is connected to the lifting plate 10 through the hydraulic rod 11; the bottom of the lifting plate 10 is rigidly connected to the hydraulic rod 11, and the top is rigidly connected to the wind turbine tower 1; when the lower wind turbine hollow pile 6 rotates, the wind turbine tower 1 therein also rotates synchronously, that is, the angle of the wind turbine tower 1 is the angle of the lower wind turbine hollow pile 6. The hydraulic device 12 controls the hydraulic rod 11 to extend and retract so that the lifting plate 10 moves up and down, thereby causing the wind turbine tower 1 to fall into the lower wind turbine hollow pile 6, thereby avoiding extreme weather at sea, protecting the wind turbine tower 1 and the mooring system, and improving the service life of the floating wind turbine.

[0046] like Figures 5 to 8 As shown, the lower mooring winch 5 includes a hollow cabin, an elastic cabin and a winch cabin, wherein a first power hole is opened on the surface of the lower mooring winch 5 and between the elastic cabin and the winch cabin for the power mooring cable 8 to pass through. The hollow cabin is a hollow sealed body that provides buoyancy for the lower mooring winch 5; the elastic cabin includes a pressure plate 14 and an elastic device 15, the pressure plate 14 is an arc-shaped rigid plate with two second power holes in the middle, and the spring device 15 is composed of a series of spring arrays, located between the arc-shaped convex surface of the pressure plate 14 and the inner wall of the lower mooring winch 5, and the two ends are rigidly connected. The power mooring cable 8 is subjected to external action and transfers the load to the elastic device 15 through the pressure plate 14, so as to better absorb the impact force and reduce the vibration, so as to achieve the purpose of improving the safety of mooring.

[0047] There are two electric winches 16 wound with a power mooring cable 8 in the winch cabin, namely a first electric winch and a second electric winch. The first electric winch is wound with a first power mooring cable, and the second electric winch is wound with a second power mooring cable.

[0048] like Fig. 9As shown, one end of the first power mooring cable and the second power mooring cable is wound around the electric winch 16, and the other end enters the elastic bin through the first power hole between the elastic bin and the winch bin, and then passes through the second power hole of the pressure plate 14 to reach the concave side of the pressure plate 14, and then goes back to the outside of the pressure plate from both sides of the pressure plate 14 along the concave side of the pressure plate, and finally drilled out from the third power hole at the bottom of the lower mooring winch 5, and connected to the cable buckle 13 of the adjacent lower wind turbine hollow pile 6.

[0049] The power of the electric winch 16 is used to adjust the length of the power mooring cables at both ends. Since the lengths of the first power mooring cable and the second power mooring cable connected to the adjacent lower-layer wind turbine hollow piles 6 are different, the adjacent lower-layer wind turbine hollow piles 6 connected thereto are driven to rotate, thereby changing the angle of the foundation wind turbine tower 1 above the adjacent lower-layer wind turbine hollow piles 6 connected thereto, thereby achieving the purpose of controlling the angle of the adjacent floating wind turbines, and changing the orientation of the wind turbine tower in real time according to the environment, thereby improving the power generation efficiency of the floating wind turbine.

[0050] like Figures 9 to 11 As shown, in this embodiment, the floating wind turbine foundations are arranged in a regular hexagon, the upper buoy 3 is connected to the shared anchor point 9 at the center of the regular hexagon through a fixed static mooring cable 7, and the lower mooring winch 5 is connected to the lower wind turbine hollow pile 6 of the adjacent floating wind turbine foundation through a dynamic mooring cable 8, forming a regular hexagonal floating wind turbine foundation array that shares the anchor foundation and controls each other, thereby improving the stability and economy of the floating wind turbine.

Claims

1. An angle-adjustable elastically moored shared floating wind turbine foundation array, characterized in that: The floating wind turbine foundation is connected and composed of a wind turbine tower (1), an upper buoy (3), a truss (4), a lower mooring winch (5), a lower wind turbine hollow pile (6), a fixed static mooring cable (7) and a shared anchor point (9); The wind turbine tower (1) is sleeved with a circumferential support ring (2); the upper buoy (3) is arranged in an equilateral triangle around the wind turbine tower (1); the bottom of the upper buoy (3) is connected to a shared anchor point (9) via a fixed static mooring cable (7); the middle of the upper buoy (3) is connected to an adjacent upper buoy (3), the circumferential support ring (2) and a lower mooring winch (5) via a truss (4); The lower wind turbine hollow pile (6) comprises a lifting plate (10), a hydraulic rod (11) and a hydraulic device (12); the wind turbine tower (1) is fixed above the lifting plate (10), and the hydraulic device (12) drives the lifting plate (10) and the wind turbine tower (1) to move via the hydraulic rod (11); The lower mooring winch (5) comprises a hollow cabin, an elastic cabin and a winch cabin, a first power hole is provided between the elastic cabin and the winch cabin; a pressure plate (14) and an elastic device (15) are provided in the elastic cabin; the pressure plate (14) is an arc-shaped rigid plate provided with a second power hole, and the elastic device (15) is located between the arc-shaped convex surface of the pressure plate (14) and the inner wall of the lower mooring winch (5); a third power hole is provided at the bottom of the lower mooring winch (5); The winch cabin contains a first electric winch and a second electric winch, the first electric winch is wound with a first power mooring cable, and the second electric winch is wound with a second power mooring cable; one end of the first power mooring cable and the second power mooring cable passes through the first power hole into the elastic cabin, passes through the second power hole of the pressure plate (14), and then passes through the outer side of the pressure plate and the third power hole of the lower mooring winch (5), and is connected to the adjacent lower wind turbine hollow pile (6); The first electric winch and the second electric winch drive adjacent wind turbine hollow piles (6) to rotate through the length difference between the first power mooring cable and the second power mooring cable to change the angle of the wind turbine tower (1) on the adjacent wind turbine hollow piles (6).

2. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 1, characterized in that: A cable buckle (13) for connecting the first power mooring cable and the second power mooring cable is provided at the bottom of the lower layer wind turbine hollow pile (6).

3. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 1, characterized in that: The lower mooring winch (5) is arranged in an equilateral triangle around the wind turbine tower (1).

4. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 1, characterized in that: The upper part of the upper buoy (3) is a hollow component, and the lower part is a reinforced concrete structure.

5. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 1, characterized in that: The pressing plate (14) is an arc-shaped rigid plate with two second power holes.

6. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 1, characterized in that: The spring device (15) is a spring array arranged between the arc-shaped convex surface of the pressure plate (14) and the inner wall of the lower mooring drum (5).

7. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 1, characterized in that: The floating wind turbine foundations are arranged in a regular hexagon to form a floating wind turbine foundation array.

8. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 7, characterized in that: The shared anchor point (9) is located at the center of the floating wind turbine foundation array.

9. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 1, characterized in that: The horizontal angle between the lower mooring winch (5) and the upper buoy (3) is 60°.

10. The angle-adjustable elastically moored shared floating wind turbine foundation array according to claim 1, characterized in that: The hollow cabin is a hollow sealing body located above the elastic cabin and the winch cabin.

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