Floating type wind power generation foundation and floating type wind power generator

Abstract

The invention relates to the technical field of wind power generation, in particular to a floating type wind power generation foundation and a floating type wind power generator. The floating type wind power generation foundation comprises a foundation platform, a mooring assembly, a ballast system and two supporting tower barrels. The foundation platform is connected with the mooring assembly; the ballast system is connected with the foundation platform and used for adjusting the gravity center and buoyancy of the foundation platform; the two supporting tower barrels are connected with the foundation platform at intervals. The floating type wind power generation foundation is applied to a floating type wind power generator, two wind power generator sets can be installed on the floating type wind power generation foundation, and the problems of mechanical manufacturing and machining capacity bottleneck, experimental testing equipment capacity bottleneck, hoisting and transporting equipment capacity bottleneck and the like existing in the development process of ultra-high-power generator sets are effectively solved. By the adoption of the basic structure, the floating type unit can be directly universal with existing mature products, the manufacturing cost of a supply chain is greatly reduced, and meanwhile commercial operation of the floating type unit with high cost performance is better achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular, to a floating wind power generation foundation and a floating wind turbine generator. Background Art

[0002] With the advancement of wind power development towards the deep sea and far sea, wind turbines are gradually becoming larger, and ultra-large deep sea and far sea floating units of 25 MW and above have emerged.

[0003] However, in the face of the development of ultra-large units, there are many problems in the existing technology and manufacturing system. From the perspective of technology development, components such as blades, gearboxes, shaft systems, and generators are subject to cost control constraints in the development of high-power units, and face problems of machine set vibration induced by stiffness deformation matching problems. The torsional stiffness of ultra-long blades is low, the resonance frequency of the main drive chain is low, and it is difficult to control the seal deformation of large-size structures, and the process requirements for generators are high. Under the coupled action of the frequencies of generators, main gearboxes, and blades, the design difficulty of the unit increases significantly. From the aspects of manufacturing and testing, higher requirements are faced in the heat treatment and machining equipment of gearbox gear rings, blade molds and workshops, and type test benches for core components. There are obvious restrictions in these aspects in China, which bring huge challenges to the commercial application of deep sea and far sea floating wind power technology. Summary of the Invention

[0004] The objectives of the present invention include providing a floating wind power generation foundation and a floating wind turbine generator. The floating wind power generation foundation is applied to the floating wind turbine generator and can install two wind turbine generators, effectively avoiding problems such as bottlenecks in mechanical manufacturing and processing capabilities, experimental test equipment capabilities, and hoisting and transportation equipment capabilities during the development of ultra-high power units. By adopting this foundation structure, it can be directly compatible with existing mature products, while significantly reducing the manufacturing cost of the supply chain and better realizing the commercial operation of cost-effective floating units.

[0005] The present invention can be implemented as follows: In a first aspect, the present invention provides a floating wind power generation foundation, which includes a foundation platform, a mooring assembly, a ballast system, and two support tower barrels; The foundation platform is connected to the mooring assembly; the ballast system is connected to the foundation platform and is used to adjust the center of gravity and buoyancy of the foundation platform; the two support tower barrels are spaced apart and connected to the foundation platform.

[0006] Optionally, the foundation platform includes a hollow first horizontal pipe column, a second horizontal pipe column, and a third horizontal pipe column; The second horizontal pipe column and the third horizontal pipe column are respectively connected to both ends of the first horizontal pipe column at an angle; the ballast system is used to adjust the water distribution in the first horizontal pipe column, the second horizontal pipe column, and the third horizontal pipe column to adjust the center of gravity of the foundation platform; Among them, the two support tower cylinders are respectively connected to both ends of the first horizontal pipe column.

[0007] Optionally, a partition plate is arranged in the middle section of the first horizontal pipe column to divide the interior of the first horizontal pipe column into a first partition and a second partition; the first partition is communicated with the second horizontal pipe column to form a first balance water chamber; the second partition is communicated with the third horizontal pipe column to form a second balance water chamber; The ballast system includes a first ballast pumping assembly connected to the first horizontal pipe column. The first ballast pumping assembly is used to pump the water in the first balance water chamber to the second balance water chamber, or pump the water in the second balance water chamber to the first balance water chamber to adjust the center of gravity of the foundation platform.

[0008] Optionally, the foundation platform further includes a first vertical pipe column and a second vertical pipe column; the first vertical pipe column and the second vertical pipe column are respectively connected to the second horizontal pipe column and the third horizontal pipe column; The ballast system includes a second ballast pumping assembly connected to the first vertical pipe column and a third ballast pumping assembly connected to the second vertical pipe column; The second ballast pumping assembly is used to export the water in the first vertical pipe column or import water into the first vertical pipe column, and the third ballast pumping assembly is used to export the water in the second vertical pipe column or import water into the second vertical pipe column to adjust the center of gravity and buoyancy of the foundation platform.

[0009] Optionally, the floating wind power foundation includes two anchor chain cables. One ends of the two anchor chain cables are respectively connected to the first vertical pipe column and the second vertical pipe column, and the other ends thereof are rotatably connected to the mooring assembly.

[0010] Optionally, the mooring assembly includes a rotating block, a turret bearing, a fixed block and a mooring chain; The rotating block is rotatably connected to the fixed block through the turret bearing; Both of the two anchor chain cables are connected to the rotating block, and the mooring chain is connected to the fixed block.

[0011] Optionally, the included angles between the two support tower cylinders and the first horizontal pipe column are both greater than 90°, the included angle between the second horizontal pipe column and the support tower cylinder at the same end as the first horizontal pipe column is less than 90°, and the included angle between the third horizontal pipe column and the support tower cylinder at the same end as the first horizontal pipe column is less than 90°.

[0012] Optionally, the floating wind power foundation further includes two support tie rods and two support railings; One ends of the two support tie rods are respectively connected to the two support tower cylinders, and the other ends thereof are both connected to the first horizontal pipe column; One ends of the two support railings are respectively connected to the two support tower cylinders, and the other ends thereof are respectively connected to the second horizontal pipe column and the third horizontal pipe column.

[0013] Optionally, the floating wind power foundation further includes support columns and support rods; The support column is connected to the middle section of the first horizontal pipe column, and the first ballast pumping assembly is connected to the support column; the support rod is connected to the support column and is coaxially arranged with the support column; Wherein, both support tie rods are connected to the support rod.

[0014] In a second aspect, the present invention provides a floating wind turbine, which includes two wind turbine units and the above-mentioned floating wind power foundation; The two wind turbine units are respectively connected to the two support tower barrels.

[0015] The beneficial effects of the floating wind power foundation and the floating wind turbine provided by the present invention include: The floating wind power foundation includes a foundation platform, a mooring assembly, a ballast system, and two support tower barrels; the foundation platform is connected to the mooring assembly; the ballast system is connected to the foundation platform and is used to adjust the center of gravity and buoyancy of the foundation platform; the two support tower barrels are spaced apart and connected to the foundation platform. This floating wind power foundation is applied to a floating wind turbine, and it can install two wind turbine units, effectively avoiding problems such as bottlenecks in mechanical manufacturing and processing capabilities, experimental test equipment capabilities, and hoisting and transportation equipment capabilities during the development of ultra-large power units. By adopting this foundation structure, it can be directly compatible with existing mature products, greatly reducing the manufacturing cost of the supply chain while better realizing the commercial operation of cost-effective floating units. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the floating wind power foundation provided in this embodiment from the first perspective; Figure 2 It is a schematic structural diagram of the floating wind power foundation provided in this embodiment from the second perspective; Figure 3 It is a schematic structural diagram of the floating wind power foundation provided in this embodiment from the third perspective; Figure 4 It is a schematic structural diagram of the floating wind turbine provided in this embodiment from the first perspective; Figure 5 It is a schematic structural diagram of the floating wind turbine provided in this embodiment from the second perspective; Figure 6 This is a schematic structural diagram of the floating wind turbine provided in this embodiment from the third perspective.

[0018] Icons: 100 - Floating wind power foundation; 110 - Foundation platform; 130 - Mooring assembly; 150 - Ballast system; 170 - Support tower barrel; 111 - First horizontal pipe column; 112 - Second horizontal pipe column; 113 - Third horizontal pipe column; 114 - Partition board; 115 - First partition; 116 - Second partition; 151 - First ballast pumping assembly; 119 - First vertical pipe column; 121 - Second vertical pipe column; 152 - Second ballast pumping assembly; 191 - Anchor chain cable; 131 - Rotating block; 132 - Turret bearing; 133 - Fixed block; 134 - Mooring chain; 192 - Support tie rod; 193 - Support railing; 194 - Support column; 195 - Support rod; 200 - Floating wind turbine; 210 - Wind turbine unit. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0021] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0023] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0024] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0025] Currently, the development waters for wind power are gradually moving towards the deep and far sea, and the development of wind turbines is also gradually moving towards larger sizes. Currently, the main issue in the development of deep and far sea floating wind power technology is to solve the problem of meeting commercial operation requirements, specifically including breakthroughs in three major technologies: the wind turbine itself, the floating foundation, and the mooring system.

[0026] The inventors have found through research that currently, there are mainly two types of ultra-large deep and far sea floating units with a capacity of 25 MW and above. One is the conventional single unit, where one unit is equipped with one floating foundation. The structural forms of the floating foundation include: barge type, single-column type, three-column semi-submersible type, and single-column semi-submersible type. In the existing technology, when developing high-power units, only the design of the component sizes of the unit is enlarged, with longer blades, larger gearboxes, and higher power designed. The influence of scale effects poses a higher challenge to the product reliability. For deep and far sea floating wind farms, due to the far distance from the shore, the operation and maintenance costs and difficulties of the units are high, and high-reliability products are required. The other is to split the power of a single unit into two, and two units share one floating foundation. Through a V-shaped support tower structure, the two units are installed in the middle of the floating foundation. The wind turbine uses a downwind fan and is equipped with a horizontal cable and an inclined cable system. The floating foundation uses 4 columns to form a triangular structure. Columns are provided at the positions of the vertices of the triangle, and a column is also provided at the center position of the triangle to support the wind power on the V-shaped tower.

[0027] There are certain difficulties in the design and development of ultra-large units in the existing technology and manufacturing system. Firstly, from the aspect of technology development, when facing the development of high-power units in terms of blades, gearboxes, shaft systems, and generators, restricted by cost control, the first problem faced is the vibration problem of the unit induced by the stiffness deformation matching problem. The design of ultra-long blades results in lower torsional stiffness, lower frequencies in the flapping and pitching directions of the blades, and due to the design of high transmission ratios and large torques in the main drive chain, the resonance frequency of the main drive chain of the unit is lower. At the same time, in the design of large-size structures, it is more difficult to control the deformation of the seal structure. In the design of generators, the large size and high speed result in a greater rotor linear velocity, which requires high motor technology. Under the coupled action of the frequencies of the generator, the main gearbox, and the blades, the unit design is difficult. On the other hand, higher requirements are put forward for manufacturing process equipment, processing difficulty, hoisting and transportation equipment, and test benches. For example, for the heat treatment and machining equipment of the gear ring of the gearbox, for the investment in blade molds and factories beyond the limit, and for the type tests of core components such as blades, gearboxes, and generators, a larger test bench is required. Currently, there are obvious restrictions in China for these, which pose a huge challenge to the commercial application of deep and far sea floating technology.

[0028] When using a double - impeller floating unit, compared with a single unit, under the condition of the same swept area per kilowatt of the unit, the length in the vertical direction will decrease, but the length in the horizontal direction will increase. The horizontal direction determines the size of the floating foundation. Therefore, when using a double - impeller floating wind power, there is a problem of large foundation structure size. Currently, the V - type tower barrel support is adopted mainly to solve the problem of too large span size between the two units. When using a down - wind unit, since the wind needs to pass through the tower barrel before blowing towards the blade rotating unit, there is an influence of the tower shadow effect, resulting in obvious fluctuations in the rotation of the unit. To solve this problem, the current patent adopts a raindrop - shaped tower barrel, making the tower barrel streamlined to avoid the interference of the tower barrel on the air flow and affecting the rotation of the blades. At the same time, compared with the up - wind unit, the down - wind unit generates an opposite external thrust on the main bearing support system of the unit, requiring a higher load - bearing capacity for the shafting. Moreover, the blades of the down - wind unit are inconsistent with the current single - unit design scheme and need to be manufactured and designed separately, and cannot share the supply chain system of the industry. For the raindrop - shaped tower barrel, on the one hand, there is a problem of difficult rolling and welding of the tower barrel steel plate, and on the other hand, there is a problem of asymmetric stiffness, resulting in difficult load - bearing. It is necessary to increase the cable system and necessary cable tensioning, which poses a huge challenge to the later operation and maintenance, and also makes the entire mechanical structure system complex.

[0029] For the above reasons, please refer to Figures 1 - 3 , this embodiment provides a floating wind power foundation 100, and the floating wind power foundation 100 includes a foundation platform 110, a mooring assembly 130, a ballast system 150, and two support tower barrels 170; The foundation platform 110 is connected to the mooring assembly 130; the ballast system 150 is connected to the foundation platform 110 and is used to adjust the center of gravity and buoyancy of the foundation platform 110; the two support tower barrels 170 are spaced apart and connected to the foundation platform 110.

[0030] Please refer to Figures 1 - 3 , the working principle of the floating wind power foundation 100 is: The floating wind power foundation 100 includes a foundation platform 110, a mooring assembly 130, a ballast system 150, and two support tower barrels 170. The foundation platform 110 is connected to the mooring assembly 130. The ballast system 150 is connected to the foundation platform 110 and is used to adjust the center of gravity and buoyancy of the foundation platform 110. The two support tower barrels 170 are spaced apart and connected to the foundation platform 110.

[0031] Among them, the base platform 110 provides support for the entire structure, the mooring assembly 130 ensures that the foundation is fixed in position at sea, and the ballast system 150 adjusts the center of gravity and buoyancy of the base platform 110 by adjusting the distribution of ballast water, thereby maintaining the stability and balance of the foundation. The two support towers 170 are connected to the base platform 110 at intervals to provide a stable support point for the wind turbine 210, so that it can evenly transfer the load to the base platform 110. This basic structure can effectively avoid various bottleneck problems in the development process of ultra-high power units, and can be used in common with existing mature products, reduce supply chain manufacturing costs, and realize the commercial operation of cost-effective floating units.

[0032] On this basis, please refer to Figures 1 - 3 , and combined with Figures 4 - 6 , the floating wind power generation foundation 100 can install two wind turbines 210, effectively avoiding the bottlenecks of mechanical manufacturing and processing capacity, experimental test equipment capacity, and hoisting and transportation equipment capacity in the development process of ultra-large power units. By adopting this basic structure, it can be directly compatible with existing mature products, greatly reducing the supply chain manufacturing cost while better realizing the commercial operation of cost-effective floating units.

[0033] It should be noted that when the floating wind power generation foundation 100 is applied to the floating wind turbine 200, the blade and main bearing support system can be guaranteed to be compatible with the existing mature technical system by adopting the upwind unit. The upwind unit can directly drive the unit to rotate with the incoming wind, thereby avoiding the tower shadow effect of the existing downwind unit, so that the conventional circular tower can be used, simplifying the processing and manufacturing process. In addition, in order to solve the problem of the long horizontal distance between the double impellers and the risk of the blades being deformed and sweeping the tower under the action of wind load, the tower support structure of each unit adopts an externally inclined and internally inclined design. Among them, the external inclination can reduce the horizontal distance between the bottom foundations of the towers of the two units, while the internal inclination can increase the distance between the blade tip and the tower, thereby improving the overall performance and reliability of the floating wind power generation foundation 100.

[0034] For further information, please refer to Figures 1 - 6 In this embodiment, when configuring the base platform 110, the base platform 110 includes a hollow first horizontal pipe column 111, a second horizontal pipe column 112, and a third horizontal pipe column 113; The second horizontal pipe string 112 and the third horizontal pipe string 113 are connected to the two ends of the first horizontal pipe string 111 at an angle respectively; the ballast system 150 is used to adjust the distribution of water in the first horizontal pipe string 111, the second horizontal pipe string 112 and the third horizontal pipe string 113 to adjust the center of gravity of the foundation platform 110; The two supporting towers 170 are respectively connected to two ends of the first horizontal pipe column 111 .

[0035] Based on the above structural settings, through the structural design of the three horizontal pipe columns mentioned above, the structure of the foundation platform 110 can be simplified. Moreover, during its operation, the ballast system 150 adjusts the water distribution in the first horizontal pipe column 111, the second horizontal pipe column 112, and the third horizontal pipe column 113, and then adjusts the center of gravity of the foundation platform 110, thereby enhancing its stability during the floating process. In particular, by adjusting the corresponding center of gravity, the rolling during the floating process can be offset.

[0036] Therefore, through the fine adjustment of the center of gravity of the foundation platform 110, the swinging torque caused by uneven wind force can be offset during the operation process, enhancing the stability of the foundation. The two support tower barrels 170 are respectively connected to both ends of the first horizontal pipe column 111. This layout method can ensure the firm and reliable connection between the support tower barrels 170 and the foundation platform 110, and effectively transmit various loads generated by the wind turbine 210.

[0037] Specifically, to improve the convenience of adjusting its center of gravity and reduce the adjustment difficulty, a partition 114 is arranged in the middle section of the first horizontal pipe column 111 to divide the interior of the first horizontal pipe column 111 into a first partition 115 and a second partition 116; the first partition 115 is communicated with the second horizontal pipe column 112 to form a first balance water chamber; the second partition 116 is communicated with the third horizontal pipe column 113 to form a second balance water chamber; Please refer to Figures 1 - 6 , the ballast system 150 includes a first ballast pumping component 151 connected to the first horizontal pipe column 111. The first ballast pumping component 151 is used to pump the water in the first balance water chamber to the second balance water chamber, or pump the water in the second balance water chamber to the first balance water chamber, so as to adjust the center of gravity of the foundation platform 110. That is, the ballast system 150 can pump the water in the first balance water chamber to the second balance water chamber, or vice versa. In this way, the center of gravity position of the foundation platform 110 can be quickly adjusted in the lateral direction to cope with the change of wind direction or uneven wind force, improving the stability and adaptability of the foundation.

[0038] Moreover, based on the above content, please refer to Figures 1 - 6 , the foundation platform 110 further includes a first vertical pipe column 119 and a second vertical pipe column 121; the first vertical pipe column 119 and the second vertical pipe column 121 are respectively connected to the second horizontal pipe column 112 and the third horizontal pipe column 113; the ballast system 150 includes a second ballast pumping component 152 connected to the first vertical pipe column 119 and a third ballast pumping component connected to the second vertical pipe column 121; The second ballast pumping assembly 152 is used to export the water in the first vertical pipe column 119 or import water into the first vertical pipe column 119, and the third ballast pumping assembly is used to export the water in the second vertical pipe column 121 or import water into the second vertical pipe column 121 to adjust the center of gravity and buoyancy of the foundation platform 110.

[0039] Thus, through the above structural settings, by setting up two vertical pipe columns, it is possible to adjust the total weight and buoyancy by importing or exporting seawater into or out of the two vertical pipe columns, so as to offset the pitching during the floating process and improve the stability during the floating process. It should be noted that during the above adjustment process, the center of gravity of the foundation platform 110 can be adjusted synchronously. Therefore, during the operation of the above ballast system 150, it is necessary to comprehensively consider the actual operating state of the foundation platform 110, and then comprehensively control the first ballast pumping assembly 151, the second ballast pumping assembly 152 and the third ballast pumping assembly to improve the operating stability of the foundation platform 110. That is, these two ballast pumping assemblies can export or import the water in the corresponding vertical pipe columns to adjust the center of gravity and buoyancy of the foundation platform 110. When encountering the pitching action of the waves, by adjusting the water levels in the two vertical pipe columns, the buoyancy distribution is changed, thereby reducing the pitching amplitude and enhancing the stability of the foundation. At the same time, this adjustment method can also affect the position of the center of gravity synchronously to achieve multi-dimensional stable control.

[0040] Please refer to Figures 1 - 6 , when connecting the above-mentioned foundation platform 110 with the mooring assembly 130, the floating wind power foundation 100 includes two anchor chain cables 191. One ends of the two anchor chain cables 191 are respectively connected to the first vertical pipe column 119 and the second vertical pipe column 121, and the other ends thereof are rotatably connected to the mooring assembly 130. The anchor chain cables 191 play a key role in connecting and force transmission between the foundation platform 110 and the mooring assembly 130, and can effectively transmit the loads received by the wind turbine 210 to the mooring assembly 130 and then disperse them to the seabed. The rotatable connection method allows the foundation platform 110 to rotate relative to the mooring assembly 130 within a certain range to adapt to the wave fluctuations and wind direction changes, and avoid the structural fatigue and damage caused by rigid connection.

[0041] Moreover, the mooring assembly 130 includes a rotating block 131, a turret bearing 132, a fixed block 133 and a mooring chain 134; the rotating block 131 is rotatably connected to the fixed block 133 through the turret bearing 132; both of the two anchor chain cables 191 are connected to the rotating block 131, and the mooring chain 134 is connected to the fixed block 133.

[0042] In this way, when the fixed block 133 is fixed to the seabed through a plurality of mooring chains 134, the entire floating wind power foundation 100 can be fixed to the mooring assembly 130 (except for the rotation direction), and the mooring assembly 130 is a single-point mooring floating block; moreover, since the rotating block 131 is rotatably connected to the fixed block 133 through a turret bearing 132, and both of the two anchor chain cables 191 are connected to the rotating block 131, the floating wind power foundation 100 can also yaw relative to the mooring assembly 130 to ensure that the wind turbine 210 can always align with the wind direction. By providing yaw alignment for the floating unit by the mooring assembly 130 and actively aligning with the wind by superimposing the wind direction and waves, the active yaw system in the wind turbine 210 for wind alignment can be cancelled, and the failure rate of the wind turbine 210 can be reduced.

[0043] Based on the above content, please refer to Figures 1 - 6 , to solve the problems of the large horizontal distance between the two impellers and the risk of the blades sweeping the tower due to deformation under the action of wind load, the tower support structure of each unit adopts the design of outward inclination and inward inclination. Among them, the outward inclination can reduce the horizontal distance between the bottom foundations of the two unit towers, while the inward inclination can increase the distance between the blade tips and the tower, thereby improving the overall performance and reliability of the floating wind power foundation 100. Based on this, when the tower support structure adopts the outward inclination design, the angles between the two support towers 170 and the first horizontal pipe column 111 are both greater than 90°; when the tower support structure adopts the inward inclination design, the angle between the second horizontal pipe column 112 and the support tower 170 at the same end as the first horizontal pipe column 111 is less than 90°, and the angle between the third horizontal pipe column 113 and the support tower 170 at the same end as the first horizontal pipe column 111 is less than 90°.

[0044] The angles between the two support towers 170 and the first horizontal pipe column 111 (as shown by the mark A in Figure 2 ) are both greater than 90°. This outward inclination design can shorten the horizontal distance between the bottom foundations of the two unit towers, reduce the lateral dimension of the foundation platform 110, and reduce the structural complexity and manufacturing cost. At the same time, the angle between the second horizontal pipe column 112 and the support tower 170 at the same end as the first horizontal pipe column 111 (as shown by the mark B in Figure 2 ), and the angles between the third horizontal pipe column 113 and the support tower 170 at the same end as the first horizontal pipe column 111 are both less than 90°, that is, the inward inclination design. This structure can increase the distance between the blade tips and the tower, and effectively avoid the risk of the blades sweeping the tower when the blades are deformed under the action of wind load, improving the safety and reliability of the wind turbine 210.

[0045] To improve the structural stability of the tower support structure, the floating wind power foundation 100 further includes two support tie rods 192 and two support railings 193; one ends of the two support tie rods 192 are respectively connected to the two support towers 170, and the other ends of both are connected to the first horizontal pipe column 111; one ends of the two support railings 193 are respectively connected to the two support towers 170, and the other ends of both are respectively connected to the second horizontal pipe column 112 and the third horizontal pipe column 113.

[0046] In addition, please refer to Figures 1 - 6 , the floating wind power foundation 100 further includes a support column 194 and a support rod 195; the support column 194 is connected to the middle section of the first horizontal pipe column 111, and the first ballast pumping assembly 151 is connected to the support column 194; the support rod 195 is connected to the support column 194 and is coaxially arranged with the support column 194; wherein, both of the two support tie rods 192 are connected to the support rod 195.

[0047] Such a support structure arrangement further enhances the connection strength and stability between the support tower 170 and the foundation platform 110. When various loads are generated on the wind turbine 210 under the action of wind force, they can effectively disperse these loads.

[0048] In summary, please refer to Figures 1 - 6 , the floating wind power foundation 100 has at least the following advantages: The floating wind power foundation 100 can install at least two wind turbines 210. The upwind wind turbine 210 is installed, and the unit directly faces the wind, avoiding the influence of tower shadow on the operation fluctuation of the unit. For the support tower 170 supporting the unit, on the one hand, it forms an angle with the horizontal pipe column in the front view projection, and on the other hand, it forms an angle with the left and right horizontal pipe columns in the side view projection, so that the tower support structure adopts the design of external inclination and internal inclination. Among them, the external inclination can reduce the horizontal distance between the bottom foundations of the two unit towers, and the internal inclination can increase the distance between the blade tip and the tower, thereby improving the overall performance and reliability of the floating wind power foundation 100; moreover, through the supporting support tie rods 192 and support railings 193, the wind turbine load can be effectively dispersed to the foundation platform 110, reducing the problem of excessive load on local positions; The two columns of the floating wind power foundation 100 share a single-point mooring floating block (i.e., the mooring assembly 130) through the anchor chain cable 191, satisfying the yaw of the floating wind turbine 210 around the single-point mooring floating block, ensuring that the wind turbine 210 can always align with the wind direction. By using the single-point mooring floating block to provide yaw and wind alignment for the floating unit, and using the wind direction to superimpose the wave for active wind alignment, the active yaw system for wind alignment in the wind turbine 210 can be simplified, reducing the failure rate of the wind turbine 210; The first horizontal pipe column 111, the second horizontal pipe column 112, the third horizontal pipe column 113, the first vertical pipe column 119 and the second vertical pipe column 121 jointly provide basic buoyancy. At the same time, the internally configured connected ballast system 150 can solve the problems of rolling and pitching, ensuring that under the combined action of wind, wave and current, whether the two impellers rotate in the same direction, inwardly towards each other or outwardly away from each other, the basic stability control requirements can be met.

[0049] Based on the above content, please refer to Figures 1 - 6 , this embodiment further provides a floating wind turbine 200. The floating wind turbine 200 includes two wind turbine units 210 and the above-mentioned floating wind power foundation 100; the two wind turbine units 210 are respectively connected to two support tower barrels 170.

[0050] The two wind turbine units 210 are respectively connected to the two support tower barrels 170. This layout enables the floating wind turbine 200 to make full use of the support capabilities of the two support tower barrels 170 to achieve efficient and stable power generation operation. Through the design of external inclination and internal inclination, the support tower barrel 170 not only enhances the structural stability, but also effectively solves the problems of the large horizontal distance between the two impellers and the risk of the blades sweeping the tower due to deformation under the action of wind load.

[0051] The design of external inclination reduces the horizontal distance between the bottom foundations of the tower barrels of the two units, cleverly reducing the lateral dimension of the foundation platform 110, thereby reducing the structural complexity and manufacturing cost. At the same time, the design of internal inclination cleverly increases the distance between the blade tips and the tower barrel. This design greatly avoids the risk of the blades sweeping the tower when deformed under the action of wind load, and significantly improves the operation safety of the wind turbine unit 210.

[0052] The ballast system 150 realizes fine adjustment of the center of gravity of the foundation platform 110 by adjusting the water levels in the horizontal pipe columns and vertical pipe columns inside the foundation platform 110. This process not only helps to improve the stability of the foundation, but also enables the foundation platform 110 to better adapt to the external forces of wind, wave and current during the floating process, effectively reducing structural fatigue and damage caused by uneven load distribution.

[0053] During operation, the first ballast pumping assembly 151, the second ballast pumping assembly 152 and the third ballast pumping assembly work together to adjust the center of gravity of the foundation platform 110 in real time according to the actual operating conditions. This method ensures that the wind turbine unit 210 can maintain stable operation under different environmental conditions; the setting of the mooring assembly 130 enables the floating wind power foundation 100 to perform yaw movements flexibly; When the wind direction changes, by rotating the rotating block 131 relative to the fixed block 133, the wind turbine 210 can always align with the wind direction, thus significantly improving the power generation efficiency. This yaw mechanism can simplify the active yaw system in the traditional wind turbine 210, effectively reducing the failure rate and maintenance cost, and thus significantly improving the reliability and economy of the entire wind power generation system; Through the optimized center of gravity adjustment and flexible yaw alignment mechanism of the floating wind turbine 200, the wind turbine 210 can always be in the best operating state, maximizing the utilization of wind energy resources, thus significantly improving the power generation efficiency; the design of the outer inclined and inner inclined support tower barrels 170, combined with the precise adjustment of the ballast system 150, enables the floating wind power generation foundation 100 to maintain stability under complex sea conditions, reducing the swaying and swinging caused by the action of wind, waves and currents, and significantly improving the operating safety and reliability of the wind turbine 210; in addition, the design of the floating wind turbine 200 avoids various bottleneck problems in the development of ultra-large power units and can be universal with existing mature products, thus significantly reducing the supply chain manufacturing cost and achieving cost-effective commercial operation.

[0054] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A floating wind power foundation, characterized in that: The floating wind power foundation (100) includes a foundation platform (110), a mooring assembly (130), a ballast system (150), and two support tower barrels (170); The foundation platform (110) is connected to the mooring assembly (130); the ballast system (150) is connected to the foundation platform (110) and is used to adjust the center of gravity and buoyancy of the foundation platform (110); the two support tower barrels (170) are spaced apart and connected to the foundation platform (110).

2. The floating wind power foundation according to claim 1, characterized in that: The foundation platform (110) includes a hollow first horizontal pipe column (111), a second horizontal pipe column (112), and a third horizontal pipe column (113); The second horizontal pipe column (112) and the third horizontal pipe column (113) are respectively connected to both ends of the first horizontal pipe column (111) at an angle; the ballast system (150) is used to adjust the water distribution in the first horizontal pipe column (111), the second horizontal pipe column (112), and the third horizontal pipe column (113) to adjust the center of gravity of the foundation platform (110); Wherein, the two support tower barrels (170) are respectively connected to both ends of the first horizontal pipe column (111).

3. The floating wind power foundation according to claim 2, characterized in that: A partition plate (114) is arranged in the middle section of the first horizontal pipe column (111) to divide the interior of the first horizontal pipe column (111) into a first partition (115) and a second partition (116); the first partition (115) is communicated with the second horizontal pipe column (112) to form a first balance water chamber; the second partition (116) is communicated with the third horizontal pipe column (113) to form a second balance water chamber; The ballast system (150) includes a first ballast pumping assembly (151) connected to the first horizontal pipe column (111), and the first ballast pumping assembly (151) is used to pump the water in the first balance water chamber to the second balance water chamber, or pump the water in the second balance water chamber to the first balance water chamber to adjust the center of gravity of the foundation platform (110).

4. The floating wind power foundation according to claim 2, characterized in that: The foundation platform (110) further includes a first vertical pipe column (119) and a second vertical pipe column (121); the first vertical pipe column (119) and the second vertical pipe column (121) are respectively connected to the second horizontal pipe column (112) and the third horizontal pipe column (113); The ballast system (150) includes a second ballast pumping assembly (152) connected to the first vertical pipe column (119) and a third ballast pumping assembly connected to the second vertical pipe column (121); The second ballast pumping assembly (152) is used to export the water in the first vertical pipe column (119) or import water into the first vertical pipe column (119), and the third ballast pumping assembly is used to export the water in the second vertical pipe column (121) or import water into the second vertical pipe column (121) to adjust the center of gravity and buoyancy of the foundation platform (110).

5. The floating wind power foundation according to claim 4, wherein: The floating wind power foundation (100) includes two anchor chain cables (191). One end of each of the two anchor chain cables (191) is respectively connected to the first vertical pipe column (119) and the second vertical pipe column (121), and the other ends thereof are rotatably connected to the mooring assembly (130).

6. The floating wind power foundation according to claim 5, wherein: The mooring assembly (130) includes a rotating block (131), a turret bearing (132), a fixed block (133), and a mooring chain (134); The rotating block (131) is rotatably connected to the fixed block (133) through the turret bearing (132); Both of the two anchor chain cables (191) are connected to the rotating block (131), and the mooring chain (134) is connected to the fixed block (133).

7. The floating wind power foundation according to any one of claims 2-6, wherein: The angles between the two support tower barrels (170) and the first horizontal pipe column (111) are both greater than 90°. The angle between the second horizontal pipe column (112) and the support tower barrel (170) located at the same end as the first horizontal pipe column (111) is less than 90°. The angle between the third horizontal pipe column (113) and the support tower barrel (170) located at the same end as the first horizontal pipe column (111) is less than 90°.

8. The floating wind power foundation according to claim 7, wherein: The floating wind power foundation (100) further includes two support tie rods (192) and two support railings (193); One end of each of the two support tie rods (192) is respectively connected to the two support tower barrels (170), and the other ends thereof are both connected to the first horizontal pipe column (111); One end of each of the two support railings (193) is respectively connected to the two support tower barrels (170), and the other ends thereof are respectively connected to the second horizontal pipe column (112) and the third horizontal pipe column (113).

9. The floating wind power foundation according to claim 8, wherein: The floating wind power foundation (100) further includes a support column (194) and a support rod (195); The support column (194) is connected to the middle section of the first horizontal pipe column (111), and the first ballast pumping assembly (151) is connected to the support column (194); the support rod (195) is connected to the support column (194) and is coaxially arranged with the support column (194); Wherein, both of the two support tie rods (192) are connected to the support rod (195).

10. A floating wind turbine, characterized in that: The floating wind turbine (200) includes two wind turbine units (210) and the floating wind power foundation (100) according to any one of claims 1-9; The two wind turbine units (210) are respectively connected to the two support tower tubes (170).

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