Floating type fan foundation and wind generating set

Abstract

The utility model relates to a floating type draught fan foundation and a wind generating set, the floating type draught fan foundation comprises a floating body and a bending moment compensation device, the floating body comprises a first stand column and a plurality of floating body assemblies distributed in the circumferential direction of the first stand column at intervals, and the first stand column comprises a first end and a second end which are arranged in the axial direction; the first end is used for supporting the fan body. The bending moment compensation device is arranged on the floating body and comprises a reverse supporting piece, a first traction piece and a driving mechanism, the reverse supporting piece comprises a base end and a movable end, the base end is rotationally connected to the first stand column, and the first traction piece is connected to the movable end and the floating body assembly; the driving mechanism is used for driving the reverse supporting piece to turn over away from the first end and at least partially protrude out of the bottom face of the floating body assembly in the axial direction, so that the floating body assembly is tensioned through the first traction piece, the bending moment of the floating body assembly is neutralized through tensioning the floating body assembly through the traction pieces, the bearing capacity of the floating type draught fan foundation is improved, and the construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation, in particular to a floating wind turbine foundation and a wind turbine generator set. BACKGROUND

[0002] With the development of offshore wind power industry in recent years, the available sea area for fixed wind turbine foundation is increasingly reduced. In order to achieve sustainable development of offshore wind power industry, it is necessary to vigorously develop deep-sea floating wind power. At present, the design of floating wind turbine foundation is mostly based on the concept of traditional offshore platform, and the construction cost is much higher than that of offshore fixed wind turbine foundation.

[0003] The floating wind turbine foundation made of concrete material can effectively reduce the cost and promote the commercialization of floating wind power. However, the concrete material has the characteristics of pressure resistance but tensile resistance, and the floating wind turbine foundation made of concrete material is prone to tensile failure during use, which limits the application of the floating wind turbine foundation made of concrete material. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a floating wind turbine foundation and a wind turbine generator set, which can improve the carrying capacity of the floating wind turbine foundation and reduce the cost of the floating wind turbine foundation.

[0005] In one aspect, the present application provides a floating wind turbine foundation, which comprises a floating main body and a bending moment compensation device. The floating main body comprises a first column and a plurality of floating body assemblies. The first column comprises a first end and a second end arranged along an axial direction. The first end is used to support a wind turbine main body. The plurality of floating body assemblies are distributed around the circumference of the first column. Each floating body assembly is connected to the first column. The bending moment compensation device is arranged on the floating main body. The bending moment compensation device comprises a counter-support, a first traction member and a driving mechanism. The counter-support comprises a base end and a movable end. The base end is rotationally connected to the first column. The first traction member is connected to the movable end and the floating body assembly. The driving mechanism is used to drive the counter-support to overturn away from the first end and at least partially protrude from the bottom surface of the floating body assembly along the axial direction, so as to tension the floating body assembly through the first traction member.

[0006] According to one aspect of the present application, the bending moment compensation device comprises a first state and a second state. The driving mechanism is configured to drive the bending moment compensation device to switch between the first state and the second state. In the first state, the counter-support is attached to the first column, and the first traction member is in a relaxed state. In the second state, the movable end of the counter-support protrudes from the bottom surface of the floating body assembly along the axial direction, so as to tension the floating body assembly through the first traction member, and the first traction member is in a tensioned state.

[0007] According to an aspect of the embodiment of the present application, the base end of the counter-support is rotationally connected to the bottom surface of the first column, or the base end of the counter-support is rotationally connected to the side wall of the first column, and in the circumferential direction of the first column, the counter-support is located between two adjacent floating body assemblies.

[0008] According to an aspect of the embodiment of the present application, the driving mechanism comprises a first winding and unwinding assembly and a second winding and unwinding assembly, the first winding and unwinding assembly is arranged on the floating body assembly, and the second winding and unwinding assembly is arranged on the first column. The first traction member connects the first winding and unwinding assembly and the movable end of the counter-support, and the bending moment compensation device further comprises a second traction member, the second traction member connects the second winding and unwinding assembly and the movable end of the counter-support, and in the first state, the second traction member is in a tightened state.

[0009] According to an aspect of the embodiment of the present application, the number of the first winding and unwinding assemblies is plural and corresponds to the floating body assemblies one by one, one end of each first traction member is connected to the first winding and unwinding assembly, and the other end is connected to the movable end of the counter-support.

[0010] According to an aspect of the embodiment of the present application, the number of the first winding and unwinding assemblies is less than the number of the floating body assemblies, part of the floating body assemblies are provided with the first winding and unwinding assemblies, and the other part of the floating body assemblies are provided with attachment points. One end of each first traction member is connected to the movable end of the counter-support, and the other end is connected to the first winding and unwinding assembly or the attachment point.

[0011] According to an aspect of the embodiment of the present application, the number of the floating body assemblies is at least three, the base end of the counter-support is rotationally connected to the side wall of the first column, and in the circumferential direction of the first column, the first winding and unwinding assembly is arranged on at least one floating body assembly on the side away from the counter-support.

[0012] According to an aspect of the embodiment of the present application, the floating body assembly has a support surface, the support surface is provided with a communication cavity penetrating to the bottom surface, the first winding and unwinding assembly is arranged on the support surface, and the first traction member extends to the bottom surface side of the floating body assembly through the communication cavity and is connected to the movable end of the counter-support. And / or, the base end of the counter-support is rotationally connected to the side wall of the first column, the second winding and unwinding assembly is arranged on the top surface of the first column, and the second traction member extends to the side wall through the top surface of the first column and is connected to the movable end of the counter-support.

[0013] According to an aspect of the embodiment of the present application, the floating body assembly comprises a second column and a floating body, the second column is arranged at intervals around the first column, and the second column is connected to the first column through the floating body. The bottom surface of the first column and the bottom surface of the second column are arranged in the same plane, and the first traction member connects the bottom surface of the second column and the movable end of the counter-support.

[0014] According to an aspect of the embodiment of the present application, the floating body is connected to the second end of the first column, and the bottom surface of the floating body is arranged in the same plane with the bottom surface of the first column and the bottom surface of the second column.

[0015] According to an aspect of the embodiments of the present application, at least one of the first column of the floating body and the float assembly comprises a concrete body.

[0016] In another aspect, the embodiments of the present application provide a wind turbine generator set, comprising a wind turbine body and the floating wind turbine foundation as described above.

[0017] The floating wind turbine foundation provided by the embodiments of the present application can drive the counter-support to overturn away from the first end and at least partially protrude from the bottom surface of the float assembly in the axial direction by the driving mechanism when the wind turbine generator set is in the working state, so as to provide a downward bending moment for the float assembly by the first traction to compensate for the net buoyancy bending moment borne by the float assembly in the normal working state, thereby improving the carrying capacity of the floating wind turbine foundation. Meanwhile, the floating wind turbine foundation based on the above structure can also reduce the amount of concrete and reinforcement, further reducing the construction cost of the floating wind turbine foundation, and laying the foundation for the price reduction of the floating wind turbine foundation. BRIEF DESCRIPTION OF DRAWINGS

[0018] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Figure 1 is a structural schematic diagram of a wind turbine generator set provided by an embodiment of the present application;

[0020] Figure 2 is a bottom view of a floating wind turbine foundation provided by an embodiment of the present application;

[0021] Figure 3 is a front view of the floating wind turbine foundation provided by an embodiment of the present application in a first state;

[0022] Figure 4 is a front view of the floating wind turbine foundation provided by an embodiment of the present application;

[0023] Figure 5 is a front view of the floating wind turbine foundation provided by another embodiment of the present application.

[0024] In the drawings:

[0025] 100-floating wind turbine foundation; 200-wind turbine body; 210-tower; 220-impeller;

[0026] 1-floating body; 11-first column; 12-float assembly; 121-second column; 1211-supporting surface; 1212-communicating cavity; 122-float; 13-supporting member;

[0027] 2-bending moment compensation device; 21-counter support; 22-first traction member; 23-driving mechanism; 231-first retractable assembly; 232-second retractable assembly; 24-second traction member;

[0028] Z-axis direction.

[0029] In the drawings, the same components are designated by the same reference numerals. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0030] Features and exemplary embodiments of various aspects of the present application will be described below in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely illustrative of the present application and is not intended to limit the present application, as is apparent to one of ordinary skill in the art. In the drawings and description, well-known structures and techniques have not been shown or described in detail in order not to obscure the application; and, for the sake of clarity, some structural or functional details have been omitted. In addition, features described below can be combined in any suitable manner in one or more embodiments.

[0031] The orientation words appearing in the following description are the directions shown in the drawings, and are not intended to limit the floating wind turbine foundation and wind turbine generator set of the present application. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 shows a structural schematic diagram of a wind turbine generator set provided by some embodiments of the present application, Figure 2 shows a bottom view of a floating wind turbine foundation provided by some embodiments of the present application.

[0033] The wind turbine generator set comprises a wind turbine foundation and a wind turbine main body 200 arranged on the wind turbine foundation. For offshore wind turbine generator sets, the wind turbine foundation is a floating wind turbine foundation 100, and the wind turbine main body 200 comprises a tower 210, a nacelle, a generator and a rotor 220. The tower 210 is connected to the wind turbine foundation, the nacelle is arranged at the top end of the tower 210, and the generator is arranged in the nacelle. The rotor 220 comprises a hub and a plurality of blades connected to the hub, and the rotor 220 is connected to the rotating shaft of the generator through the hub. When wind acts on the blades, the entire rotor 220 and the rotating shaft of the generator are driven to rotate, so as to convert wind energy into electric energy.

[0034] The floating wind turbine foundation 100 in the prior art mainly has the forms of semi-submersible type, tension leg type and single column type. Among them, the semi-submersible floating wind turbine foundation 100, which is widely used and mature in technology, is more suitable for the foundation form of the current offshore wind power development.

[0035] The semi-submersible floating wind turbine foundation 100 at the current stage is mostly made of steel, but the steel consumption is huge and the cost is high. If a concrete material is used to design the floating wind turbine foundation 100, the cost can be saved, but the stress is greatly affected.

[0036] Specifically, the semi-submersible floating wind turbine foundation 100 mainly comprises a first column 11 and a plurality of floating body assemblies 12 arranged around the first column 11, and the plurality of floating body assemblies 12 are connected to the first column 11 and form a cantilever beam structure. In the working state of the floating wind turbine foundation 100, the floating wind turbine foundation 100 will be affected by gravity and buoyancy. The gravity is the downward force generated by the weight of the floating wind turbine foundation 100 itself and the wind turbine main body 200 carried thereby, and the buoyancy is the upward force generated by the first column 11 and the floating body assemblies 12 of the floating wind turbine foundation 100 pushing away seawater. The floating wind turbine foundation 100 relies on the balance of its own gravity and buoyancy to maintain stability.

[0037] In actual application, the floating wind turbine foundation 100 is subjected to environmental loads such as wind waves, ocean currents and the like, so the wind turbine main body 200 is often arranged on the first column 11, and in the working state of the floating wind turbine foundation 100, the state can be adjusted by the ballast water of the plurality of floating body assemblies 12, so that the wind turbine generator set is finally static on the sea surface in the positive floating state. Since the wind turbine main body 200 is arranged only on the first column 11, the floating body assembly 12 is subjected to a buoyancy greater than its own gravity, and the floating body assembly 12 in the cantilever beam structure will bear the upward net buoyancy bending moment. When the floating wind turbine foundation 100 is made of concrete material, since the concrete material has the characteristics of pressure resistance and tensile resistance, the bottom of the floating wind turbine foundation 100 made of concrete material is prone to failure due to tension, which affects the carrying capacity of the floating wind turbine foundation 100 and limits the application of the floating wind turbine foundation 100 made of concrete material.

[0038] Therefore, in order to overcome the above-mentioned defects, the embodiments of the present application also provide a new floating wind turbine foundation 100 which can be used in the wind turbine generator set of the above-mentioned embodiments and as a component part of the wind turbine generator set, of course, it can also be produced or sold independently as an independent component.

[0039] Please refer to Figure 1 and Figure 2 , the embodiments of the present application provide a floating wind turbine foundation 100, the floating wind turbine foundation 100 comprises a floating body 1 and a bending moment compensation device 2, the floating body 1 comprises a first column 11 and a plurality of floating body assemblies 12, the first column 11 comprises a first end and a second end arranged along the axial direction Z, the first end is used to support the wind turbine main body 200, the plurality of floating body assemblies 12 are distributed around the circumference of the first column 11, and each floating body assembly 12 is connected to the first column 11. The bending moment compensation device 2 is arranged on the floating body 1, the bending moment compensation device 2 comprises a counter-support 21, a first traction member 22 and a driving mechanism 23, the counter-support 21 comprises a base end and a movable end, the base end is rotatably connected to the first column 11, the first traction member 22 is connected to the movable end and the floating body assembly 12, and the driving mechanism 23 is used to drive the counter-support 21 to overturn away from the first end and at least partially protrude from the bottom surface of the floating body assembly 12 along the axial direction Z, so as to tension the floating body assembly 12 through the first traction member 22.

[0040] The floating type wind turbine foundation 100 in the embodiment of the present application is provided with the bending moment compensation device 2 on the floating body 1. When the wind turbine generator set is in the working state, the driving mechanism 23 drives the counter-supporting part 21 to overturn and at least partially protrude from the bottom surface of the floating body assembly 12 along the axial direction Z, so as to tension the floating body assembly 12 through the first traction part 22, provide the downward bending moment for the floating body assembly 12, compensate the net floating force bending moment borne by the floating body assembly 12 in the normal working state, and thus improve the carrying capacity of the floating type wind turbine foundation 100. Meanwhile, the floating type wind turbine foundation 100 based on the above structure can also reduce the amount of concrete and reinforcement, further reduce the construction cost of the floating type wind turbine foundation 100, and lay the foundation for the price reduction of the floating type wind turbine foundation 100.

[0041] Optionally, the first column 11 is a central column, and the first column 11 includes a first end and a second end. When the wind turbine generator set is in the working state, the first end is an end of the first column 11 located on the sea level, for supporting the wind turbine body 200. The plurality of floating body assemblies 12 are arranged at intervals around the first column 11, so that the wind turbine generator set can stably float on the sea surface through the combined action of the first column 11 and the plurality of floating body assemblies 12.

[0042] Optionally, the number of floating body assemblies 12 can be three or four. The plurality of floating body assemblies 12 can be distributed at equal angles around the circumferential side of the first column 11. For example, when the number of floating body assemblies 12 is three, the adjacent floating body assemblies 12 are distributed at intervals of 120° around the first column 11, and each floating body assembly 12 is connected to the first column 11. The bending moment compensation device 2 corresponding to each floating body assembly 12 can be provided with a first traction part 22. The first traction part 22 is arranged with the floating body assembly 12, and the movable end of the counter-supporting assembly is connected to each floating body assembly 12 through the plurality of first traction parts 22, so as to compensate the net floating force bending moment of each floating body assembly 12 through the bending moment compensation device 2, improve the stability and carrying capacity of the floating type wind turbine foundation 100.

[0043] The driving mechanism 23 can be an electric motor, a crank rocker mechanism or a hydraulic motor, etc. The driving mechanism 23 drives the counter-supporting part 21 to overturn, so that the counter-supporting part 21 can be arranged to at least partially protrude from the bottom surface of the floating body assembly 12 along the axial direction Z.

[0044] Optionally, the first traction part 22 can be a steel wire rope or a high molecular material fiber rope, such as an aramid high molecular rope. The aramid high molecular rope has the characteristics of high strength, wear resistance and corrosion resistance, and can improve the reliability of the floating type wind turbine foundation 100.

[0045] In some optional embodiments, the first traction member 22 is connected to the bottom surface of the floating body assembly 12. Since the floating wind turbine foundation 100 can be subjected to external loads such as sea waves in a marine environment, connecting the first traction member 22 to the bottom surface of the floating body assembly 12 can also help to resist the external loads and improve the overall stability of the floating wind turbine foundation 100. Moreover, since the movable end of the counter-support assembly can be at least partially protruded from the bottom surface of the floating body assembly 12 along the axial direction Z when the wind turbine generator set is in operation, the first traction member 22 can exert a downwardly inclined force on the floating body assembly 12 to compensate for the net buoyancy bending moment of the floating body assembly 12 and improve the reliability of the floating wind turbine foundation 100 while improving the overall stability of the floating wind turbine foundation 100.

[0046] In the above structure, the specific connection position of the first traction member 22 on the bottom surface of the floating body assembly 12 can be adjusted according to the distribution of the buoyancy force acting on the floating body assembly 12. Optionally, for the same floating body assembly 12, one first traction member 22 can be provided, or multiple first traction members 22 can be provided. When multiple first traction members 22 are provided to tension the same floating body assembly 12, the number and position of each first traction member 22 can be comprehensively designed according to factors such as the magnitude and distribution of the buoyancy force, the shape and size of the floating body assembly 12, and the external load conditions.

[0047] In some optional embodiments, the floating body assembly 12 includes a second column 121 and a floating body 122, the second column 121 is arranged around the first column 11, and the second column 121 is connected to the first column 11 through the floating body 122. The bottom surface of the first column 11 and the bottom surface of the second column 121 are arranged in a coplanar manner, and the first traction member 22 is connected to the bottom surface of the second column 121 and the movable end of the counter-support assembly.

[0048] The second column 121 serves as a side column of the floating wind turbine foundation 100, the second column 121 is connected to the first column 11 through the floating body 122, and the bottom surfaces of the first column 11 and the second column 121 are arranged in a coplanar manner. This middle arrangement is more convenient for adjusting the ballast water and improving the overall stability of the floating wind turbine foundation 100.

[0049] Based on the above structure, by connecting the first traction member 22 to the bottom surface of the second column 121, compared to connecting the first traction member 22 to the floating body 122, the distance between the connection point of the first traction member 22 on the floating body assembly 12 and the movable end of the counter-support assembly can be increased, thereby increasing the force arm of the force exerted by the first traction member 22 on the floating body assembly 12. Under the condition that the driving mechanism 23 drives the movable end of the counter-support assembly to move the same distance, the compensation amount that the bending moment compensation device 2 can exert on the floating body assembly 12 is increased, which is more convenient for neutralizing the bending moment of the floating body assembly 12.

[0050] Optionally, taking the number of the second column 121 as three as an example, the three second columns 121 can be arranged in an equilateral triangle, and the first column 11 is arranged at the center of the equilateral triangle, and the second column 121 is connected with the first column 11 through the floating body 122 and forms a tetrahedral hybrid structure.

[0051] Please refer to Figure 1 and Figure 2 In some optional embodiments, the floating body 122 is connected to the second end of the first column 11, and the bottom surface of the floating body 122 is arranged in a plane with the bottom surface of the first column 11 and the bottom surface of the second column 121.

[0052] The floating body 122 can adopt structures such as a stiffened plate, a circular pipe, and a square pipe. By connecting the floating body 122 to the second end of the first column 11 and arranging the bottom surface of the floating body 122 in a plane with the bottom surface of the first column 11 and the bottom surface of the second column 121, the height of the center of gravity of the floating wind turbine foundation 100 in the embodiments of the present application can be reduced, the influence of external loads on the floating wind turbine foundation 100 can be reduced, and the stability of the floating wind turbine foundation 100 can be improved.

[0053] In some optional embodiments, the floating body 1 further comprises a support 13 connected to the top surface of the floating body 122 and the first end of the first column 11.

[0054] By arranging the support 13 and connecting the support 13 to the top surface of the floating body 122 and the first end of the first column 11, an inclined bracing structure can be formed, the amount of concrete and the amount of reinforcement can be reduced, the structure of the floating wind turbine foundation 100 can be simplified, the integrity of the floating wind turbine foundation 100 can be strengthened, and the structural stability can be improved.

[0055] Optionally, the support 13 can also be a traction rope, that is, the top surface of the floating body 122 and the first end of the first column 11 are respectively provided with fixed points, and the two ends of the traction rope are respectively connected to the fixed points of the top surface of the floating body 122 and the first end of the first column 11 to realize the arrangement of the support 13. The traction rope can be a steel wire rope or a high molecular material fiber rope, for example, it can be an aramid high molecular rope.

[0056] In some optional embodiments, at least one of the first column 11 of the floating body 1 and the floating body assembly 12 comprises a concrete body.

[0057] The concrete body refers to at least one of the first column 11, the second column 121, and the floating body 122 of the floating body 1 being in the form of a concrete structure, for example, it can be a concrete frame and a concrete plate wrapped outside the concrete frame, and the concrete frame and the concrete plate combine to form a sealed cavity, so that the floating body 1 can float on the sea level.

[0058] By setting at least one of the first column 11, the second column 121 and the floating body 122 in the form of a concrete structure, the construction cost can be effectively reduced while ensuring the stability of the structure, and economic benefits can be provided. The floating wind turbine foundation 100 in the embodiment of the present application can adapt to the characteristics of the concrete material being resistant to pressure but not resistant to tension by setting the bending moment compensation device 2 on the floating body 1, neutralize the bending moment received by the floating body assembly 12 while setting at least one of the first column 11, the second column 121 and the floating body 122 in the form of a concrete structure, effectively solve the problem of unbalanced stress of the floating wind turbine foundation 100, and reduce the risk of failure of the floating body assembly 12 due to tension. At the same time, the amount of concrete and reinforcement can be reduced, the weight of the structure can be reduced, and the cost of the floating wind turbine foundation 100 can be further reduced.

[0059] In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the specific description of the embodiments of the present application will be given below with reference to the accompanying drawings. Figures 1 to 4 The specific structure of the bending moment compensation device 2 in the embodiment of the present application will be described.

[0060] The bending moment compensation device 2 can include a first state and a second state, and the driving mechanism 23 is configured to drive the bending moment compensation device 2 to switch between the first state and the second state. In the first state, the counter-support 21 is stored on one side of the first column 11, and the first traction member 22 is in a relaxed state; in the second state, the active end of the counter-support 21 is arranged to protrude along the axial direction Z relative to the bottom surface of the floating body assembly 12, so as to tension the floating body assembly 12 through the first traction member 22, and the first traction member 22 is in a tensioned state.

[0061] When the wind turbine generator set is in a standby state, for example, during the construction, transportation and installation of the floating wind turbine foundation 100, the floating wind turbine foundation 100 can be switched to the first state, and the first traction member 22 is in a relaxed state. When the wind turbine generator set is in a working state, the floating body assembly 12 will be subjected to an upward net buoyancy bending moment, so the floating wind turbine foundation 100 can be switched to the second state to tension the first traction member 22 through the bending moment compensation device 2, and the first traction member 22 is in a tensioned state and provides a downward bending moment for the floating body assembly 12, compensating for the upward net buoyancy bending moment of the floating body assembly 12 during normal operation, thereby improving the carrying capacity of the floating wind turbine foundation 100 and further reducing the cost of the floating wind turbine foundation 100 under the same carrying capacity.

[0062] In some optional embodiments, the base end of the counter-support 21 is rotationally connected to the bottom surface of the first column 11 (not shown in the figure), or the base end of the counter-support 21 is rotationally connected to the side wall of the first column 11, and in the circumferential direction of the first column 11, the counter-support 21 is located between two adjacent floating body assemblies 12.

[0063] That is, according to the specific structure of the counter-support 21 and the first column 11, the base end of the counter-support 21 can be rotationally connected to the bottom surface of the first column 11, or the base end of the counter-support 21 can be rotationally connected to the side wall of the first column 11. Among them, considering that the counter-support 21 has a certain length, by rotationally connecting the base end of the counter-support 21 to the side wall of the first column 11, the counter-support 21 can be attached to the side wall of the first column 11 in the first state, so as to be stored on one side of the first column 11, thereby improving the reliability of the bending moment compensation device 2.

[0064] Alternatively, when the base end of the counter-support 21 is rotationally connected to the side wall of the first column 11, the side wall of the first column 11 can be provided with a hinge support, and the base end of the counter-support 21 is rotationally connected to the hinge support to take the hinge support as the fulcrum of the counter-support rod, thereby improving the reliability of the counter-support rod. In addition, the extension direction of the rotation axis of the base end of the counter-support 21 relative to the hinge support can be arranged in the horizontal direction, so that the counter-support 21 can be flipped downward to protrude relative to the bottom surface of the floating body assembly 12.

[0065] Alternatively, the base end of the counter-support 21 can be arranged close to the second end of the first column 11, so as to increase the distance that the counter-support 21 can protrude relative to the bottom surface of the floating body assembly 12 along the axial direction Z under the same length of the counter-support 21, thereby facilitating the compensation of the net buoyancy bending moment of the floating body assembly 12.

[0066] For the convenience of description, the following will be described by taking the base end of the counter-support 21 rotationally connected to the side wall of the first column 11 as an example.

[0067] Please refer to Figures 1 to 4 In some optional embodiments, the driving mechanism 23 includes a first winding and unwinding assembly 231 and a second winding and unwinding assembly 232, the first winding and unwinding assembly 231 is arranged on the floating body assembly 12, and the second winding and unwinding assembly 232 is arranged on the first column 11. The first traction member 22 is connected to the first winding and unwinding assembly 231 and the movable end of the counter-support 21, and the bending moment compensation device 2 further includes a second traction member 24, the second traction member 24 is connected to the second winding and unwinding assembly 232 and the movable end of the counter-support 21. In the first state, the second traction member 24 is in a tightened state.

[0068] That is, by arranging the first winding and unwinding assembly 231 and the second winding and unwinding assembly 232, the bending moment compensation device 2 can be switched between the first state and the second state. Among them, the first winding and unwinding assembly 231 can include a winch or a hoist, and the second winding and unwinding assembly 232 can also include a winch or a hoist.

[0069] The first deployment assembly 231 is arranged on the floating body assembly 12, and the first deployment assembly 231 is connected to the movable end of the counter-bracing member 21 through the first traction member 22. The second deployment assembly 232 is arranged on the first vertical column 11, and the second deployment assembly 232 is connected to the movable end of the counter-bracing member 21 through the second traction member 24.

[0070] When the floating wind turbine foundation 100 has not been installed in place, for example, during the construction, transportation and installation of the floating wind turbine foundation 100, the floating wind turbine foundation 100 can be in the first state. In the first state, the first traction member 22 is in a relaxed state, and the second traction member 24 is in a tightened state. The second deployment assembly 232 pulls the counter-bracing member 21 through the second traction member 24 to store the counter-bracing member 21 in the side wall of the first vertical column 11.

[0071] When the floating wind turbine foundation 100 is installed in place, the bending moment compensation device 2 needs to be switched from the first state to the second state. At this time, the first traction member 22 can be tightened through the first deployment assembly 231, and the second traction member 24 can be gradually released through the control of the second deployment assembly 232. The counter-bracing member 21 can be stably lowered and turned to the target position under the action of its own gravity and the first deployment assembly 231 and the second deployment assembly 232. Moreover, during the in-service period of the floating wind turbine foundation 100, the counter-bracing member 21 can be maintained in the target position through the control of the second deployment assembly 232, so as to compensate the bending moment of the floating body assembly 12 through the first traction member 22.

[0072] Optionally, the counter-bracing member 21 can be arranged as a strut, and the cross section of the strut can be square, circular, annular or other geometric shapes. The counter-bracing member 21 can use a truss and a plate shell structure.

[0073] Optionally, the movable end of the counter-bracing member 21 can be welded with an eye plate. The eye plate can provide a connection point. The first traction member 22 of the first deployment assembly 231 and the second traction member 24 of the second deployment assembly 232 are connected to the eye plate of the counter-bracing member 21, so as to realize the connection of the first traction member 22 and the second traction member 24 with the movable end of the counter-bracing member 21.

[0074] Please refer to Figures 1 to 4 In some optional embodiments, the number of the first deployment assemblies 231 is multiple and arranged one by one corresponding to the floating body assembly 12. One end of each first traction member 22 is connected to the first deployment assembly 231, and the other end is connected to the movable end of the counter-bracing member 21.

[0075] For example, when three floating body assemblies 12 are provided, three first winding and unwinding assemblies 231 can be correspondingly provided, and the first winding and unwinding assemblies 231 are respectively arranged on the floating body assemblies 12. The first traction member 22 can be driven and tensioned through the plurality of first winding and unwinding assemblies 231. This transmission scheme has high working load and can provide large power to meet the tensioning requirement, thereby improving the reliability of switching of the floating wind turbine foundation 100 between the first state and the second state.

[0076] Referring to Figure 5 , Figure 5 A front view of the floating wind turbine foundation 100 according to another embodiment of the present application is shown.

[0077] In some optional embodiments, the number of first winding and unwinding assemblies 231 is less than the number of floating body assemblies 12. Some of the floating body assemblies 12 are provided with the first winding and unwinding assemblies 231, and the other floating body assemblies 12 are provided with the attachment points. One end of each first traction member 22 is connected to the movable end of the counter-support member 21, and the other end is correspondingly connected to the first winding and unwinding assembly or the attachment point.

[0078] For example, when three floating body assemblies 12 are provided, only one first winding and unwinding assembly 231 can be correspondingly provided, or two first winding and unwinding assemblies 231 can be correspondingly provided. For example, when only one first winding and unwinding assembly 231 is provided, the first winding and unwinding assembly 231 is arranged on one floating body assembly 12, and the bottom surfaces of the other two floating body assemblies 12 can be welded with eye plates to be fixedly constrained through the eye plates. By reducing the number of first winding and unwinding assemblies 231, the reliable flipping of the driving counter-support member 21 can be ensured while the construction cost is reduced.

[0079] In some optional embodiments, the number of floating body assemblies 12 is at least three, and the base end of the counter-support member 21 is rotationally connected to the side wall of the first column 11. In the circumferential direction of the first column 11, the first winding and unwinding assembly 231 is arranged on the floating body assembly 12 away from the counter-support member 21.

[0080] That is, when the base end of the counter-support member 21 is rotationally connected to the side wall of the first column 11, the first winding and unwinding assembly 231 can be arranged on the floating body assembly 12 away from the counter-support member 21. For example, when the floating wind turbine foundation 100 includes a first floating body assembly 12, a second floating body assembly 12, and a third floating body assembly 12, and the counter-support member 21 is arranged between the first floating body assembly 12 and the second floating body assembly 12 along the circumferential direction of the first column 11, the first winding and unwinding assembly 231 can be arranged on the third floating body assembly 12. When the floating wind turbine foundation 100 is in place, the counter-support member 21 can be flipped away from the first end through the first winding and unwinding assembly 231 from the side of the third floating body assembly 12, thereby improving the reliability of driving.

[0081] For the first retractable assembly 231 and the second retractable assembly 232, in some alternative embodiments, the floating body assembly 12 has a support surface 1211, the support surface 1211 is provided with a communication cavity 1212 penetrating to the bottom surface, the first retractable assembly 231 is arranged on the support surface 1211, and the first traction member 22 extends to the bottom surface side of the floating body assembly 12 through the communication cavity 1212 and is connected with the movable end of the counter-support member 21.

[0082] It can be understood that the first retractable assembly 231 can be arranged on the inner platform of the second vertical column 121 or the extended platform outside the second vertical column 121, and the inner platform and / or the extended platform form the support surface 1211 of the floating body assembly 12. Taking the case that the first retractable assembly 231 is arranged on the inner platform of the second vertical column 121 as an example, the first traction member 22 extends to the bottom surface of the second vertical column 121 through the communication cavity 1212 in the second vertical column 121 and is connected with the movable end of the counter-support member 21. Alternatively, when the first traction member 22 extends to the bottom surface side of the floating body assembly 12 through the communication cavity 1212 of the second vertical column 121, the communication cavity 1212 can be arranged in the axial direction Z, and the bottom surface of the second vertical column 121 can be provided with a fixed pulley, which can change the direction of the first traction member 22 to improve the reliability of the arrangement of the first traction member 22.

[0083] By arranging the first retractable assembly 231 on the inner platform of the second vertical column 121, the first retractable assembly 231 can be arranged on the sea level, without the need for sealing design of the first retractable assembly 231, which is convenient and feasible and has high reliability.

[0084] In some alternative embodiments, the second retractable assembly 232 is arranged on the top surface of the first vertical column 11, and the second traction member 24 extends to the side wall through the top surface of the first vertical column 11 and is connected with the movable end of the counter-support member 21.

[0085] Similarly to the first retractable assembly 231, the second retractable assembly 232 can be arranged on the top surface of the first vertical column 11, and when the base end of the counter-support member 21 is connected to the side wall of the first vertical column 11, the side wall of the first vertical column 11 can be provided with a fixed pulley, the second traction member 24 changes direction through the fixed pulley and extends to the side wall of the first vertical column 11 from the top surface of the first vertical column 11 to be connected with the movable end of the counter-support member 21.

[0086] By arranging the second retractable assembly 232 on the top surface of the first vertical column 11, the second retractable assembly 232 can be arranged on the sea level, without the need for sealing design of the second retractable assembly 232, which is convenient and feasible and has high reliability.

[0087] Therefore, the floating wind turbine foundation 100 provided by the embodiments of the present application innovatively functionally decomposes each component of the floating wind turbine foundation 100, the base end of the counter-support 21 is rotationally connected to the first vertical column 11, the other end is connected to the driving mechanism 23 through the first traction member 22 and the second traction member 24, the driving mechanism 23 is used to drive the counter-support 21 to overturn and at least partially protrude from the bottom surface of the floating body assembly 12 along the axial direction Z, so as to provide the floating body assembly 12 with a downward bending moment, compensate for the upward net buoyancy bending moment suffered by the floating body assembly 12 during normal operation, thereby improving the load bearing performance of the floating wind turbine foundation 100, and also, under the same load bearing capacity, less concrete and steel can be used, further reducing the cost of the floating wind turbine foundation 100.

[0088] The wind turbine generator provided by the embodiments of the present application has the advantages of simple and reliable structure, low cost, strong load bearing capacity and the like, and is easy to popularize and use, because it comprises the floating wind turbine foundation 100 provided by the above-mentioned embodiments.

[0089] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, each of the technical features mentioned in each of the embodiments can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A floating wind turbine foundation, characterized in that, The utility model relates to a floating body (1) and a bending moment compensation device (2) arranged on the floating body (1), the floating body (1) comprises a first column (11) and a plurality of floating body assemblies (12), the first column (11) comprises a first end and a second end arranged along an axial direction (Z), the first end is used to support a fan body (200), and the plurality of floating body assemblies (12) are distributed at intervals around the circumference of the first column (11), and each floating body assembly (12) is connected to the first column (11) respectively. The bending moment compensation device (2) comprises a counter-supporting part (21), a first traction part (22) and a driving mechanism (23), the counter-supporting part (21) comprises a base end and a movable end, the base end is rotationally connected to the first column (11), the first traction part (22) is connected to the movable end and the floating body assembly (12), and the driving mechanism (23) is used to drive the counter-supporting part (21) to overturn away from the first end and at least partially protrude from the bottom surface of the floating body assembly (12) along the axial direction (Z) so as to tension the floating body assembly (12) through the first traction part (22). The bending moment compensation device (2) comprises a first state and a second state, and the driving mechanism (23) is configured to drive the bending moment compensation device (2) to switch between the first state and the second state.

2. The floating wind turbine foundation according to claim 1, characterized in that In the first state, the counter-supporting part (21) is arranged on one side of the first column (11), and the first traction part (22) is in a relaxed state. In the second state, the movable end of the counter-supporting part (21) is arranged to protrude from the bottom surface of the floating body assembly (12) along the axial direction (Z) so as to tension the floating body assembly (12) through the first traction part (22), and the first traction part (22) is in a tensioned state. The base end of the counter-supporting part (21) is rotationally connected to the bottom surface of the first column (11).

3. The floating wind turbine foundation according to claim 2, wherein Alternatively, the base end of the counter-supporting part (21) is rotationally connected to the side wall of the first column (11), and in the circumferential direction of the first column (11), the counter-supporting part (21) is located between two adjacent floating body assemblies (12). The driving mechanism (23) comprises a first winding and unwinding assembly (231) arranged on the floating body assembly (12) and a second winding and unwinding assembly (232) arranged on the first column (11).

4. The floating wind turbine foundation of claim 2, wherein, The first traction part (22) is connected to the first winding and unwinding assembly (231) and the movable end of the counter-supporting part (21), and the bending moment compensation device (2) further comprises a second traction part (24) connected to the second winding and unwinding assembly (232) and the movable end of the counter-supporting part (21), and in the first state, the second traction part (24) is in a tightened state. ​ 5. The floating wind turbine foundation according to claim 4, wherein The first retraction and release assemblies (231) are provided in a one-to-one correspondence with the floating body assemblies (12), and one end of each first traction member (22) is connected to the first retraction and release assembly (231) and the other end is connected to the movable end of the counter-support member (21).

6. The floating wind turbine foundation of claim 4, wherein, The number of the first retraction and release assemblies (231) is less than the number of the floating body assemblies (12), and part of the floating body assemblies (12) are provided with the first retraction and release assemblies (231) and the other part of the floating body assemblies (12) are provided with attachment points. One end of each first traction member (22) is connected to the movable end of the counter-support member (21) and the other end is connected to the first retraction and release assembly or the attachment point.

7. The floating wind turbine foundation according to claim 6, characterized in that The number of the floating body assemblies (12) is at least three, the base end of the counter-support member (21) is rotationally connected to the side wall of the first column (11), and the first retraction and release assembly (231) is arranged on at least one of the floating body assemblies (12) on the side away from the counter-support member (21) in the circumferential direction of the first column (11).

8. The floating wind turbine foundation of claim 4, wherein, The floating body assembly (12) has a support surface (1211), a communication cavity (1212) is arranged through the support surface (1211) to the bottom surface, the first retraction and release assembly (231) is arranged on the support surface (1211), and the first traction member (22) extends to the bottom surface side of the floating body assembly (12) through the communication cavity (1212) and is connected to the movable end of the counter-support member (21). And / or, the base end of the counter-support member (21) is rotationally connected to the side wall of the first column (11), the second retraction and release assembly (232) is arranged on the top surface of the first column (11), the second traction member (24) extends to the side wall through the top surface of the first column (11) and is connected to the movable end of the counter-support member (21).

9. The floating wind turbine foundation according to any of claims 1 to 8, characterized in that The floating body assembly (12) comprises a second column (121) and a floating body (122), the second column (121) is arranged at intervals around the first column (11), and the second column (121) is connected to the first column (11) through the floating body (122). The bottom surface of the first column (11) and the bottom surface of the second column (121) are arranged in a coplanar manner, and the first traction member (22) connects the bottom surface of the second column (121) and the movable end of the counter-support member (21).

10. The floating wind turbine foundation of claim 9, wherein, The floating body (122) is connected to the second end of the first column (11), and the bottom surface of the floating body (122) is arranged in a coplanar manner with the bottom surface of the first column (11) and the bottom surface of the second column (121).

11. The floating wind turbine foundation according to any of claims 1 to 8, characterized in that At least one of the first column (11) and the floating body assembly (12) of the floating main body (1) comprises a concrete body.

12. A wind power unit, characterized in that The floating fan foundation (100) comprises a fan main body (200) and any one of claims 1-11, and the fan main body (200) is arranged on the first column (11) of the floating fan foundation (100).

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