Floating wind turbine foundation and wind turbine generator

Abstract

This application relates to a floating wind turbine foundation and a wind turbine generator set. The floating wind turbine foundation includes a floating body and a moment compensation device. The floating body includes a first column and multiple floating body components. The first column has a first end and a second end arranged axially. The first end is used to support the wind turbine body. The multiple floating body components are arranged at intervals around the first column, and each floating body component is connected to the first column. The moment compensation device is disposed on the floating body and includes a counter-bracing component, a traction component, and a drive mechanism. The counter-bracing component is connected to the first column and has an actuating end. The traction component is connected between the floating body component and the actuating end. The drive mechanism drives the actuating end to move toward the second end of the first column and at least partially protrude from the bottom surface of the floating body component axially, so as to tension the floating body component through the traction component to neutralize the moment of the floating body component, thereby improving the load-bearing capacity of the floating wind turbine foundation and reducing the cost of the floating wind turbine foundation.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a floating wind turbine foundation and a wind turbine generator set. Background Technology

[0002] With the development of offshore wind power in recent years, the available sea areas for fixed wind turbine foundations are decreasing. For the sustainable development of offshore wind power, it is essential to vigorously develop deep-sea floating wind power. Currently, the design of floating wind turbine foundations is mostly based on traditional offshore platform concepts, resulting in construction costs far exceeding those of fixed offshore wind turbine foundations.

[0003] Concrete floating wind turbine foundations can effectively reduce costs and promote the commercialization of floating wind power. However, concrete is resistant to compression but not to tension, making concrete floating wind turbine foundations prone to tensile failure during use, thus limiting their application. Summary of the Invention

[0004] This application provides a floating wind turbine foundation and a wind turbine generator set, which can improve the load-bearing capacity of the floating wind turbine foundation and reduce its cost.

[0005] On one hand, according to an embodiment of this application, a floating wind turbine foundation is proposed, including a floating body and a moment compensation device. The floating body includes a first column and multiple floating body components. The first column includes a first end and a second end arranged axially. The first end is used to support the wind turbine body. The multiple floating body components are arranged at intervals around the first column, and each floating body component is connected to the first column. The moment compensation device is disposed on the floating body and includes a counter-bracing component, a traction component, and a drive mechanism. The counter-bracing component is connected to the first column and has an actuating end. A traction component is connected between the floating body component and the actuating end. The drive mechanism drives the actuating end to move toward the second end of the first column and to at least partially protrude from the bottom surface of the floating body component axially, so as to tension the floating body component through the traction component.

[0006] According to one aspect of the embodiments of this application, the floating body assembly includes a second column and a floating body. The second column is spaced around a first column and connected to the first column via the floating body. The bottom surfaces of the first column and the second column are coplanar, and a traction member connects the bottom surface of the second column to the actuating end of the counter-bracing assembly.

[0007] According to one aspect of the embodiments of this application, a float is connected to the second end of a first column, and the bottom surface of the float is coplanar with the bottom surface of the first column and the bottom surface of the second column.

[0008] According to one aspect of the embodiments of this application, the floating body further includes a support member that connects the top surface of the floating body and the first end of the first column.

[0009] According to one aspect of the embodiments of this application, the anti-bracing component includes a fixed end connected to a first column, and a driving mechanism is configured to drive an actuating end to reciprocate relative to the fixed end along the axial direction. Alternatively, the anti-bracing component has a degree of freedom of movement along the axial direction, and the actuating end is disposed on a side of the anti-bracing component away from a first end of the first column along the axial direction, and the driving mechanism is configured to drive the anti-bracing component to reciprocate relative to the first column along the axial direction.

[0010] According to one aspect of the embodiments of this application, the moment compensation device further includes a sensing component, a control device, and a locking mechanism. The sensing component is used to detect the output torque of the drive mechanism, and the control device is configured to control the locking mechanism to lock the execution end of the anti-bracing component at the target position when the output torque is equal to a preset value.

[0011] According to one aspect of the embodiments of this application, the anti-bracing assembly has a degree of freedom of movement along the axial direction, the driving mechanism includes a drive motor and a gear disposed at the output end of the drive motor, the anti-bracing assembly is provided with a rack that extends along the axial direction, and the gear and the rack are connected in a transmission manner.

[0012] According to one aspect of the embodiments of this application, the locking mechanism includes a driving component and a locking tooth, the driving component being used to drive the locking tooth to move toward the rack and engage the locking tooth with the rack.

[0013] According to one aspect of the embodiments of this application, a first column is provided with a cavity, a counter-bracing component is disposed in the cavity, the cavity extends axially to the bottom surface of the first column and forms an opening, and a driving mechanism drives the execution end of the counter-bracing component to extend at least partially out of the cavity from the opening along the axial direction.

[0014] According to one aspect of the embodiments of this application, the cavity is disposed at the center of the first column, and the straight-line distance from the attachment point of the traction member on each float assembly to the cavity is equal.

[0015] According to one aspect of the embodiments of this application, the counter-bracing assembly has a degree of freedom of movement along the axial direction. The moment compensation device further includes a first guide member, which is fixed within the cavity and extends axially. The counter-bracing assembly is sleeved on the outer periphery of the first guide member and is movable relative to the first guide member. And / or, the moment compensation device further includes a second guide member, which is disposed within the cavity and radially disposed between the first column and the counter-bracing assembly. The second guide member is connected to one of the first column and the counter-bracing assembly and contacts the other.

[0016] According to one aspect of the embodiments of this application, at least one of the first column of the floating body and the floating body assembly comprises a concrete body.

[0017] On the other hand, according to the embodiments of this application, a wind turbine generator set is proposed, including a wind turbine body and a floating wind turbine foundation as described in the above embodiments, wherein the wind turbine body is mounted on a first column of the floating wind turbine foundation.

[0018] The floating wind turbine foundation provided in this application embodiment, when the wind turbine generator is in operation, can drive the execution end of the anti-bracing component downward through the drive mechanism. This tensions the floating body component via the traction member, providing a downward bending moment to compensate for the net buoyancy bending moment borne by the floating body component during normal operation, thereby improving the load-bearing capacity of the floating wind turbine foundation. Furthermore, the floating wind turbine foundation based on the above structure can reduce the amount of concrete and reinforcement, further reducing the construction cost of the floating wind turbine foundation and laying the foundation for the cost-effectiveness of floating wind turbine foundations. Attached Figure Description

[0019] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set provided in one embodiment of this application;

[0021] Figure 2 This is a bottom view of a floating wind turbine foundation provided in one embodiment of this application;

[0022] Figure 3 This is a front view of a floating wind turbine foundation provided in one embodiment of this application. Figure 1 ;

[0023] Figure 4 This is a front view of a floating wind turbine foundation provided in one embodiment of this application. Figure 2 .

[0024] In the attached image:

[0025] 100 - Floating wind turbine foundation; 200 - Wind turbine body; 210 - Tower; 220 - Impeller;

[0026] 1-Floating main body; 11-First column; 12-Floating body assembly; 121-Second column; 122-Floating body; 13-Supporting component;

[0027] 2-Moment compensation device; 21-Counter-bracing assembly; 211-Strut; 212-Rack; 22-Traction component; 23-Drive mechanism; 24-Locking mechanism; 25-First guide component; 26-Second guide component;

[0028] Z-axis.

[0029] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0030] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0031] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the floating wind turbine foundation and wind turbine generator set of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Please see Figure 1 and Figure 2 , Figure 1 The present application shows a schematic diagram of the structure of a wind turbine generator set provided in some embodiments. Figure 2 A bottom view of a floating wind turbine foundation provided in some embodiments of this application is shown.

[0033] A wind turbine generator set includes a wind turbine foundation and a turbine body 200 mounted on the foundation. For offshore wind turbine generator sets, the foundation is a floating foundation 100. The turbine body 200 includes a tower 210, a nacelle, a generator, and a rotor 220. The tower 210 is connected to the wind turbine foundation, the nacelle is located at the top of the tower 210, and the generator is located in the nacelle. The rotor 220 includes a hub and multiple blades connected to the hub. The rotor 220 is connected to the generator shaft through its hub. When wind power acts on the blades, it drives the entire rotor 220 and the generator shaft to rotate, converting wind energy into electrical energy.

[0034] The existing floating wind turbine foundations 100 mainly come in the forms of semi-submersible, tension leg, and single-column types. Among them, the widely used and technologically mature semi-submersible floating wind turbine foundation 100 is more suitable for the current stage of offshore wind power development.

[0035] Currently, most semi-submersible floating wind turbine foundations are made of steel, but this consumes a large amount of steel and is costly. Using concrete to design the floating wind turbine foundation can save costs, but it will have a greater impact on the stress distribution.

[0036] Specifically, the semi-submersible floating wind turbine foundation 100 mainly includes a first column 11 and multiple floating body components 12 arranged around the first column 11. The multiple floating body components 12 are connected to the first column 11 and form a cantilever beam structure. When the floating wind turbine foundation 100 is in operation, it is subject to gravity and buoyancy. Gravity is the downward force generated by the weight of the floating wind turbine foundation 100 itself and the wind turbine body 200 it supports. Buoyancy is the upward force generated by the first column 11 and the floating body components 12 displacing seawater. The floating wind turbine foundation 100 maintains stability by balancing its own weight and buoyancy.

[0037] In practical applications, the floating wind turbine foundation 100 is subject to environmental loads such as wind, waves, and ocean currents. Therefore, the main body of the wind turbine 200 is often mounted on the first column 11. When the floating wind turbine foundation 100 is in operation, its state can be adjusted by ballast water from multiple floating body components 12, ultimately allowing the wind turbine generator to remain upright and stationary on the sea surface. Since the main body of the wind turbine 200 is only mounted on the first column 11, the buoyancy force on the floating body components 12 is greater than their own weight. The cantilever beam structure of the floating body components 12 will bear an upward net buoyancy bending moment. When the floating wind turbine foundation 100 is made of concrete, due to the characteristic that concrete is resistant to compression but not to tension, the bottom of the concrete floating wind turbine foundation 100 is prone to failure due to tension, affecting the load-bearing capacity of the floating wind turbine foundation 100 and limiting its application.

[0038] Therefore, in order to overcome the above-mentioned defects, this application embodiment also provides a novel floating wind turbine foundation 100, which can be used in the wind turbine generator sets of the above embodiments and as a component of the wind turbine generator set. Of course, it can also be produced or sold separately as an independent component.

[0039] Please refer to the following: Figures 1 to 3 , Figure 3 A front view of a floating wind turbine foundation 100 provided in some embodiments of this application is shown.

[0040] This application provides a floating wind turbine foundation 100, which includes a floating body 1 and a moment compensation device 2. The floating body 1 includes a first column 11 and multiple floating body components 12. The first column 11 includes a first end and a second end arranged along the axial direction Z. The first end is used to support the wind turbine body 200. The multiple floating body components 12 are arranged at intervals around the first column 11, and each floating body component 12 is connected to the first column 11. The moment compensation device 2 is disposed on the floating body 1 and includes a counter-bracing component 21, a traction member 22, and a drive mechanism 23. The counter-bracing component 21 is connected to the first column 11 and has an actuating end. The traction member 22 is connected between the floating body component 12 and the actuating end. The drive mechanism 23 drives the actuating end to move toward the second end of the first column 11 and to at least partially protrude from the bottom surface of the floating body component 12 along the axial direction Z, so as to tension the floating body component 12 by the traction member 22.

[0041] The floating wind turbine foundation 100 in this embodiment includes a moment compensation device 2 on the floating body 1. When the wind turbine generator is in operation, the actuator of the anti-bracing component 21 can be driven downward by the drive mechanism 23 to tension the floating body component 12 via the traction component 22, providing a downward moment to the floating body component 12 to compensate for the net buoyancy moment borne by the floating body component 12 during normal operation, thereby improving the load-bearing capacity of the floating wind turbine foundation 100. Furthermore, the floating wind turbine foundation 100 based on the above structure can reduce the amount of concrete and reinforcement, further reducing the construction cost of the floating wind turbine foundation 100 and laying the foundation for the cost-effectiveness of the floating wind turbine foundation 100.

[0042] 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 is in operation, the first end is the end of the first column 11 located on the sea surface to support the wind turbine body 200. Multiple floating body components 12 are arranged at intervals around the first column 11 so that the wind turbine generator can float stably on the sea surface through the combined action of the first column 11 and the multiple floating body components 12.

[0043] Optionally, the number of floating body components 12 can be three or four. Multiple floating body components 12 can be distributed at equal angular intervals around the first column 11. For example, when there are three floating body components 12, adjacent floating body components 12 are distributed around the first column 11 at 120° intervals, and each floating body component 12 is connected to the first column 11. The moment compensation device 2 can be equipped with a traction member 22 for each floating body component 12. The traction member 22 should be connected to the floating body component 12. The execution end of the counter-bracing component 21 is connected to each floating body component 12 through multiple traction members 22, so as to compensate for the net buoyancy moment of each floating body component 12 through the moment compensation device 2, thereby improving the stability and load-bearing capacity of the floating wind turbine foundation 100.

[0044] Optionally, the traction component 22 can be a steel wire rope or a polymer fiber rope, such as an aramid polymer rope. Aramid polymer ropes have high strength, wear resistance, and corrosion resistance, which improves the reliability of the floating wind turbine foundation 100.

[0045] In some alternative embodiments, the traction member 22 is connected to the bottom surface of the floating body assembly 12. Since the floating wind turbine foundation 100 may be subjected to external loads such as waves in a marine environment, connecting the traction member 22 to the bottom surface of the floating body assembly 12 helps resist these external loads and improves the overall stability of the floating wind turbine foundation 100. Furthermore, since the actuating end of the counter-bracing assembly 21 can at least partially protrude from the bottom surface of the floating body assembly 12 along the axial direction Z when the wind turbine generator is in operation, a downward oblique force can be applied to the floating body assembly 12 via the traction member 22. This improves the overall stability of the floating wind turbine foundation 100 while compensating for the net buoyancy moment of the floating body assembly 12, thereby enhancing the reliability of the floating wind turbine foundation 100.

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

[0047] In some alternative embodiments, the float assembly 12 includes a second column 121 and a float 122. The second column 121 is spaced around the first column 11 and connected to the first column 11 via the float 122. The bottom surface of the first column 11 and the bottom surface of the second column 121 are coplanar. The traction member 22 connects the bottom surface of the second column 121 and the actuating end of the counter-support assembly 21.

[0048] The second column 121 serves as the side column of the floating wind turbine foundation 100. The second column 121 is connected to the first column 11 through the float 122. The bottom surfaces of the first column 11 and the second column 121 are coplanar. This centrally located layout makes it easier to adjust the ballast water and improves the overall stability of the floating wind turbine foundation 100.

[0049] Based on the above structure, by connecting the traction member 22 to the bottom surface of the second column 121, the distance between the connection point of the traction member 22 on the float assembly 12 and the execution end of the counter-bracing assembly 21 can be increased, thereby increasing the lever arm of the force applied by the traction member 22 to the float assembly 12. Under the condition that the execution end of the counter-bracing assembly 21 is moved by the drive mechanism 23 by the same distance, the amount of compensation that the moment compensation device 2 can apply to the float assembly 12 is increased, making it easier to neutralize the moment of the float assembly 12.

[0050] Optionally, taking three second pillars 121 as an example, the three second pillars 121 can be arranged in an equilateral triangle, with the first pillar 11 located at the center of the equilateral triangle, and the second pillars 121 connected to the first pillar 11 through the float 122 to form a tetrahedral hybrid structure.

[0051] Optionally, the bottom surface of the second column 121 may be provided with a fixing point to provide an attachment point for the traction member 22. The fixing point may be a hole plate welded to the bottom surface of the second column 121, and the traction member 22 is connected to the connecting hole on the hole plate so that the traction member 22 can be connected to the second column 121.

[0052] Please see Figures 1 to 3 In some alternative embodiments, the float 122 is connected to the second end of the first column 11, and the bottom surface of the float 122 is coplanar with the bottom surface of the first column 11 and the bottom surface of the second column 121.

[0053] The float 122 can be made of reinforced plates, round tubes, square tubes, etc. By connecting the float 122 to the second end of the first column 11 and making the bottom surface of the float 122 coplanar with the bottom surface of the first column 11 and the bottom surface of the second column 121, it can help reduce the center of gravity height of the floating wind turbine foundation 100 in this embodiment, reduce the impact of external loads on the floating wind turbine foundation 100, and improve the stability of the floating wind turbine foundation 100.

[0054] In some alternative embodiments, the floating body 1 further includes a support member 13, which connects the top surface of the floating body 122 and the first end of the first column 11.

[0055] By setting up a support member 13 and connecting the support member 13 to the top surface of the float 122 and the first end of the first column 11, an inclined support structure can be formed. This reduces the amount of concrete and reinforcement, simplifies the structure of the floating wind turbine foundation 100, strengthens the overall integrity of the floating wind turbine foundation 100, and improves the structural stability.

[0056] Optionally, the support member 13 can also be configured as a traction rope, i.e., the top surface of the float 122 and the first end of the first column 11 are respectively provided with fixing points, and the two ends of the traction rope are respectively connected to the fixing points on the top surface of the float 122 and the first end of the first column 11 to realize the configuration of the support member 13. The traction rope can be configured as a steel wire rope or a polymer fiber rope, such as an aramid polymer rope.

[0057] In some alternative embodiments, at least one of the first column 11 of the floating body 1 and the floating body assembly 12 comprises a concrete body.

[0058] The concrete body refers to at least one of the first column 11, the second column 121, and the float 122 of the floating body 1 being a concrete structure. For example, it may include a concrete frame and a concrete slab covering the outside of the concrete frame. The concrete frame and the concrete slab are combined to form a sealed cavity so that the floating body 1 can float on the sea surface.

[0059] By setting at least one of the first column 11, the second column 121, and the float 122 to a concrete structure, construction costs can be effectively reduced while ensuring structural stability, thus providing economic benefits. In this embodiment, the floating wind turbine foundation 100, by incorporating a moment compensation device 2 in the floating body 1, can adapt to the compressive but not tensile properties of concrete. While setting at least one of the first column 11, the second column 121, and the float 122 to a concrete structure, it neutralizes the bending moment experienced by the float assembly 12, effectively solving the problem of unbalanced forces in the floating wind turbine foundation 100 and reducing the risk of failure due to tension in the float assembly 12. Simultaneously, it can reduce the amount of concrete and reinforcement, lower the structural weight, and further reduce the cost of the floating wind turbine foundation 100.

[0060] To facilitate understanding of the technical solutions in the embodiments of this application, the following description is provided in conjunction with the appendix. Figures 1 to 4 The specific structure of the moment compensation device 2 in the embodiments of this application will be described.

[0061] The floating wind turbine foundation 100 may include a first state and a second state. Figure 3 and Figure 4 These are schematic diagrams showing the floating wind turbine foundation 100 in its second and first states, respectively.

[0062] The drive mechanism 23 is used to drive the floating wind turbine foundation 100 to switch between a first state and a second state. In the first state, the traction member 22 is in a relaxed state. In the second state, the execution end of the counter-support component 21 protrudes at least partially from the bottom surface of the floating body component 12 along the axial direction Z, and the traction member 22 is in a tensioned state.

[0063] 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, with the traction member 22 in a relaxed state. When the wind turbine generator is in operation, the floating body assembly 12 will be subjected to an upward net buoyancy bending moment. Therefore, the floating wind turbine foundation 100 can be switched to the second state, where the bending moment compensation device 2 tensions the traction member 22, which is in a tensioned state and provides a downward bending moment to the floating body assembly 12, compensating for the upward net buoyancy bending moment during normal operation. This improves the load-bearing capacity of the floating wind turbine foundation 100 and further reduces the cost of the floating wind turbine foundation 100 under the same load-bearing capacity.

[0064] In the bending moment compensation device 2 of this application embodiment, the drive mechanism 23 is used to drive the execution end of the anti-bracing component 21 to move toward the second end of the first column 11, so as to switch the floating wind turbine foundation 100 to the second state, which may include at least the following situations:

[0065] In some embodiments, the anti-bracing component 21 includes a fixed end connected to the first column 11, and the driving mechanism 23 is configured to drive the execution end to reciprocate relative to the fixed end along the axial direction Z.

[0066] The counter-support assembly 21 can be configured as a telescopic structure, such as a sliding telescopic structure or a spiral telescopic structure. Depending on the drive mechanism 23, it can also be configured as an electric telescopic structure or a pneumatic telescopic structure. Taking the drive mechanism 23 as a drive motor as an example, the counter-support assembly 21 can include a transmission component and a telescopic component. The transmission component can be configured as a lead screw and nut, etc., used to convert the rotational motion of the drive motor into the linear motion of the telescopic component, so that the telescopic component can extend and retract under the drive of the transmission mechanism, thereby allowing the actuator end to protrude from the bottom surface of the first column 11 relative to the fixed end along the axial Z, and tension the float assembly 12 through the traction member 22.

[0067] In other embodiments, the anti-bracing component 21 has a degree of freedom of movement along the axial direction Z, the execution end is disposed on the side of the anti-bracing component 21 away from the first end of the first column 11 along the axial direction Z, and the driving mechanism 23 is configured to drive the anti-bracing component 21 to reciprocate relative to the first column 11 along the axial direction Z.

[0068] In addition to being a telescopic structure, the counter-support assembly 21 can also have a degree of freedom of movement along the Z-axis, meaning that the entire counter-support assembly 21 can reciprocate along the Z-axis. For example, the drive mechanism 23 can be a linear drive mechanism, with the counter-support assembly 21 located at the output end of the drive mechanism 23 and able to move along the Z-axis under the drive of the drive mechanism 23. The linear drive mechanism 23 can be a ball screw mechanism, a hydraulic cylinder, a linear motor, a gear and rack mechanism 212, etc.

[0069] It is understandable that when the floating wind turbine foundation 100 is in the second state, the greater the distance of the protrusion of the execution end of the counter-bracing component 21 along the axial direction Z relative to the bottom surface of the floating body component 12, the greater the downward force exerted by the traction force on the floating body component 12, and the greater the downward bending moment provided by the bending moment compensation device 2 on the floating body component 12.

[0070] In order to achieve more accurate bending moment compensation of the floating wind turbine foundation 100 by means of the bending moment compensation device 2, in some optional embodiments, the bending moment compensation device 2 further includes a sensing component, a control device and a locking mechanism 24. The sensing component is used to detect the output parameters of the drive mechanism 23, and the control device is configured to control the locking mechanism 24 to lock the execution end of the anti-bracing component 21 at the target position when the output parameters are equal to a preset value.

[0071] The sensing component is used to detect the output parameter T of the drive mechanism 23. Output parameter T refers to the force or torque output by the drive mechanism 23 when the actuator of the anti-bracing component 21 protrudes a current distance along the axial direction Z relative to the bottom surface of the float assembly 12. Preset value T d This can be calculated based on the stress analysis of the floating wind turbine foundation 100, that is, when the output parameter T reaches the preset value T... d At that time, the compensating bending moment that the traction component 22 is equivalent to acting on the floating body assembly 12 is equal to the net buoyancy bending moment that the floating body assembly 12 experiences in the working state.

[0072] Therefore, by comparing the output parameter T with the preset value T d This allows us to determine whether the moment compensation of the floating body component 12 is in place. By setting the locking mechanism 24, it is possible to ensure that the output parameter T equals the preset value T. d At the same time, the locking mechanism 24 is controlled by the control device to lock the execution end of the counter-bracing component 21 at the target position, thereby realizing the automatic control of the moment compensation device 2, so as to more accurately realize the moment compensation of the floating wind turbine foundation 100.

[0073] Optionally, the sensing component can be configured as a force sensor or torque sensor, etc., according to the detection requirements, and the specific setting position of the sensing component can also be adjusted according to the actual detection requirements. The locking mechanism 24 can be configured as at least one of an electromagnetic locking mechanism 24 and a mechanical locking mechanism 24.

[0074] As an optional implementation, the anti-bracing assembly 21 has a degree of freedom of movement along the axial direction Z, the driving mechanism 23 includes a drive motor and a gear disposed at the output end of the drive motor, the anti-bracing assembly 21 is provided with a rack 212 extending along the axial direction Z, and the gear and the rack 212 are connected in a transmission connection.

[0075] The counter-bracing component 21 can be configured as a support rod 211 equipped with a rack 212. The rack 212 and the support rod 211 can be an integral structure. The drive mechanism 23 can include a drive motor and gears. The drive motor drives the gears to rotate, and the gears mesh with the rack 212, causing the counter-bracing component 21 to move along the axial direction Z. The traction component 22 is tensioned through the gear and rack 212 transmission. The gear and rack 212 transmission scheme has a simple structure, high reliability, and high working load, providing greater horsepower to better meet the tensioning requirements.

[0076] Optionally, the strut 211 may be provided with multiple racks 212 arranged in parallel, and the drive mechanism 23 of the moment compensation device 2 may include multiple gears, each gear meshing with a rack 212, thereby enabling the strut 211 to move axially Z-axis simultaneously through multiple gears. As an optional embodiment, the strut 211 is provided with two racks 212, and the number of gears in the moment compensation device 2 is even, for example, two or four. The gears are arranged in pairs on the racks 212 on both sides of the strut 211 to improve the reliability of the transmission.

[0077] In some alternative embodiments, the locking mechanism 24 includes a drive assembly and a locking tooth, the drive assembly being used to drive the locking tooth to move toward the rack 212 and engage the locking tooth with the rack 212.

[0078] The drive assembly can be set as a hydraulic drive assembly. During operation, when the bending moment compensation of the float assembly 12 is in place, the locking teeth can be controlled to move toward the rack 212 through the hydraulic drive assembly, and the rack 212 can be locked to restrict the degree of freedom of movement of the rack 212 along the axial direction Z.

[0079] Optionally, the number of locking mechanisms 24 can be set to two or more, with each locking mechanism 24 engaging with different areas of the rack 212 to simultaneously lock the anti-bracing assembly 21, thereby improving the reliability of locking. For example, when the support rod 211 includes multiple racks 212, the multiple locking mechanisms 24 can be correspondingly arranged with at least a portion of the racks 212, and / or, the same rack 212 of the support rod 211 can also be correspondingly provided with multiple locking mechanisms 24, with the multiple locking mechanisms 24 spaced apart along the axial direction Z and engaging with the same rack 212. As an optional embodiment, the support rod 211 is provided with two racks 212, and the number of locking structures can be set to four, with each rack 212 correspondingly provided with two locking mechanisms 24 to improve the reliability of locking.

[0080] Taking a floating body assembly 12 of three units and a bending moment compensation device 2 using a gear and rack transmission mechanism 212 as an example.

[0081] When the floating wind turbine foundation 100 is in the second state, the output parameter T of the drive mechanism 23 can be represented as the torque on the gear shaft of the drive mechanism 23, and the sensing component can be a torque sensor. At this time, the gear of the drive mechanism 23 provides a torque of magnitude T to drive the rack 212 to move, and the meshing force F of the gear acting on the rack 212 is... G Let F be n·T / r, where n is the number of gears and r is the pitch circle radius of the gear. Since the rack 212 and the support rod 211 are an integral structure, the forces on each section are the same, therefore the pressure on the support rod 211 is also F. G And equal to the resultant force of the three traction members 22, then the vertical tension exerted by a single traction member 22 on the floating body assembly 12 is F. G / 3, if the distance from the point of action of the traction component 22 to the float 122 is D, then the compensating bending moment provided by the traction component 22 to the float box is (D+L)·F G / 3.

[0082] During operation, the second column 121 is subjected to both buoyancy and gravity, the vector sum of which is the net buoyancy F. f If the length of the float 122 is L, then the uncompensated net buoyancy bending moment applied to the root of the float assembly 12 is F. f Therefore, when the output parameter T of the drive mechanism 23 satisfies the compensating bending moment (D+L)·F provided by the traction member 22 to the pontoon, G / 3 and the uncompensated net buoyancy bending moment F of the floating body assembly 12 in the working state f When L is equal, it can be proven that the compensating bending moment of the traction component 22 acting on the float assembly 12 is equal to the net buoyancy bending moment experienced by the float assembly 12 in the working state. At this time, the preset value T is calculated to be... d =3·Ff ·L·r / n(D+L).

[0083] Therefore, in practical use, when the sensing component detects the output parameter T of the drive mechanism 23, that is, the torque on the gear shaft of the drive mechanism 23 reaches the preset value T, d When the moment compensation reaches the design state, the control device can control the drive component to drive the locking tooth to lock the rack 212, thereby locking the execution end of the anti-bracing component 21 at the target position, and more accurately realizing the moment compensation of the floating wind turbine foundation 100.

[0084] Please see Figures 1 to 4 In some alternative embodiments, the first column 11 is provided with a cavity, the anti-bracing component 21 is disposed in the cavity, the cavity extends along the axial direction Z to the bottom surface of the first column 11 and forms an opening, and the driving mechanism 23 drives the execution end of the anti-bracing component 21 to extend at least partially out of the cavity along the axial direction Z from the opening.

[0085] By providing a cavity within the first column 11 and housing the counter-bracing assembly 21 within the cavity, the arrangement of the drive mechanism 23 becomes easier. Furthermore, in the first state of the floating wind turbine foundation 100, the counter-bracing assembly 21 can be housed within the cavity, facilitating the transportation and installation of the floating wind turbine foundation 100. In the second state of the floating wind turbine foundation 100, the actuating end of the counter-bracing assembly 21 can also extend at least partially out of the cavity along the Z-axis from the cavity opening to tension the traction member 22, thereby achieving moment compensation for the floating body assembly 12.

[0086] In some alternative embodiments, the cavity is located at the center of the first column 11, and the straight-line distance from the attachment point of the traction member 22 on each float assembly 12 to the cavity is equal.

[0087] When the anti-bracing component 21 is placed inside the cavity, and the straight-line distance from the attachment point of the traction member 22 on each floating component 12 to the cavity is equal, the force on each floating component 12 can be balanced, thereby improving the overall stability of the floating wind turbine foundation 100. Furthermore, it simplifies the structure of the floating wind turbine foundation 100, making the overall structure simpler and more reliable.

[0088] In some alternative embodiments, the counter-bracing assembly 21 has a degree of freedom of movement along the axial direction Z. The moment compensation device 2 further includes a first guide member 25, which is fixed within the cavity and extends along the axial direction Z. The counter-bracing assembly 21 is sleeved around the outer periphery of the first guide member 25 and is movable relative to the first guide member 25. And / or, the moment compensation device 2 further includes a second guide member 26, which is disposed within the cavity and radially disposed between the first column 11 and the counter-bracing assembly 21. The second guide member 26 is connected to one of the first column 11 and the counter-bracing assembly 21 and contacts the other.

[0089] When the anti-bracing assembly 21 is disposed in the cavity, since the anti-bracing assembly 21 is configured to reciprocate along the axial Z direction under the drive of the drive mechanism 23, the reliability of the axial Z movement can be improved by setting the first guide 25 and / or the second guide 26.

[0090] The first guide member 25 can be configured as a guide rod structure extending along the Z-axis. The guide rod structure is fixed in the cavity structure. The support rod 211 of the counter-support assembly 21 can be configured as a hollow structure. The support rod 211 is sleeved on the first guide member 25, so that it can reciprocate along the first guide member 25 under the drive of the gear, thereby improving the stability of the movement.

[0091] The second guide member 26 can be configured as a ring structure, specifically a rubber ring. The second guide member 26 can be connected to the first column 11 through its outer peripheral surface and can guide the counter-support component 21 through its inner peripheral surface. Alternatively, the second guide member 26 can also be connected to the counter-support component 21 through its inner peripheral surface and can guide the counter-support component 21 through its outer peripheral surface.

[0092] As an optional implementation, the outer peripheral surface of the second guide member 26 is fixed to the first column 11, and its inner peripheral surface contacts the anti-bracing assembly 21. This allows the second guide member 26 to provide lateral support to the anti-bracing assembly 21 during its axial movement along the Z-axis, improving the reliability of the anti-bracing assembly 21's movement along the Z-axis. Since the support rod 211 is equipped with a rack 212, the length of the rack 212 along the Z-axis and the position of the second guide member 26 can be adjusted according to the specific structure of the moment compensation device 2. This ensures that the rack 212 does not interfere with the second guide member 26, and that the position of the second guide member 26 allows the actuating end of the support rod 211 to contact the second guide member 26 even when the floating wind turbine foundation 100 is in its first state, providing lateral support.

[0093] Therefore, the floating wind turbine foundation 100 provided in this application embodiment innovatively decomposes the functions of each component of the floating wind turbine foundation 100. One end of the traction member 22 is connected to the bottom surface of the floating body assembly 12, and the other end is connected to the execution end of the counter-support assembly 21. The execution end of the counter-support assembly 21 is driven to move along the axial Z by the drive mechanism 23 to achieve tensioning of the traction member 22. Therefore, the floating wind turbine foundation 100 in this application embodiment can keep the traction member 22 in a relaxed state during its transportation and installation, and provide a downward bending moment to the floating body assembly 12 when the floating wind turbine foundation 100 is in working state, to compensate for the upward net buoyancy bending moment it receives during normal operation, thereby improving the load-bearing capacity of the floating wind turbine foundation 100, and also further reducing the cost of the floating wind turbine foundation 100 under the same load-bearing capacity.

[0094] The wind turbine generator set provided in this application embodiment includes the floating wind turbine foundation 100 provided in the above embodiments, which has the advantages of simple and reliable structure, low cost, and strong load-bearing capacity, and is easy to promote and use.

[0095] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This 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, include: The floating body (1) includes a first column (11) and a plurality of floating body components (12). The first column (11) includes a first end and a second end arranged along the axial direction (Z). The first end is used to support the fan body (200). The plurality of floating body components (12) are arranged at intervals around the first column (11). Each floating body component (12) is connected to the first column (11). A moment compensation device (2) is provided on the floating body (1). The moment compensation device (2) includes a counter-support assembly (21), a traction member (22), and a drive mechanism (23). The counter-support assembly (21) is connected to the first column (11) and has an execution end. The traction member (22) is connected between the floating body assembly (12) and the execution end. The drive mechanism (23) drives the execution end to move toward the second end of the first column (11) and to 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 traction member (22).

2. The floating wind turbine foundation according to claim 1, characterized in that The floating body assembly (12) includes a second column (121) and a floating body (122). The second column (121) is spaced 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 coplanar, and the traction member (22) connects the bottom surface of the second column (121) and the execution end of the counter-bracing component (21).

3. The floating wind turbine foundation according to claim 2, characterized in that The float (122) is connected to the second end of the first column (11), and the bottom surface of the float (122) is coplanar with the bottom surface of the first column (11) and the bottom surface of the second column (121).

4. The floating wind turbine foundation according to claim 3, wherein The floating body (1) also includes a support member (13), which connects the top surface of the floating body (122) and the first end of the first column (11).

5. The floating wind turbine foundation according to any of claims 1 to 4, characterized in that The anti-bracing assembly (21) includes a fixed end connected to the first column (11), and the driving mechanism (23) is configured to drive the execution end to reciprocate relative to the fixed end along the axis (Z). Alternatively, the anti-bracing component (21) has a degree of freedom of movement along the axis (Z), the actuating end is disposed on the side of the anti-bracing component (21) away from the first end of the first column (11) along the axis (Z), and the driving mechanism (23) is configured to drive the anti-bracing component (21) to reciprocate relative to the first column (11) along the axis (Z).

6. The floating wind turbine foundation according to claim 5, wherein The bending moment compensation device (2) also includes a sensing component, a control device, and a locking mechanism (24); The sensing component is used to detect the output torque of the drive mechanism (23), and the control device is configured to control the locking mechanism (24) to lock the execution end of the anti-bracing component (21) at the target position when the output torque is equal to a preset value.

7. The floating wind turbine foundation according to claim 6, characterized in that The anti-bracing assembly (21) has a degree of freedom of movement along the axial direction (Z). The driving mechanism (23) includes a driving motor and a gear disposed at the output end of the driving motor. The anti-bracing assembly (21) is provided with a rack (212) extending along the axial direction (Z). The gear is connected to the rack (212) in a transmission manner.

8. The floating wind turbine foundation according to claim 7, characterized in that The locking mechanism (24) includes a driving component and a locking tooth. The driving component is used to drive the locking tooth to move toward the rack (212) and engage the locking tooth with the rack (212).

9. The floating wind turbine foundation of claim 5, wherein, The first column (11) is provided with a cavity, and the anti-bracing component (21) is disposed in the cavity. The cavity extends along the axial direction (Z) to the bottom surface of the first column (11) and forms an opening. The driving mechanism (23) drives the execution end of the anti-bracing component (21) to extend at least partially out of the cavity along the axial direction (Z) from the opening.

10. The floating wind turbine foundation according to claim 9, characterized in that The cavity is located at the center of the first column (11), and the straight-line distance from the attachment point of the traction member (22) on each of the float assemblies (12) to the cavity is equal.

11. The floating wind turbine foundation of claim 9, wherein, The counter-bracing assembly (21) has a degree of freedom of movement along the axial direction (Z). The bending moment compensation device (2) further includes a first guide member (25), which is fixed in the cavity and extends along the axial direction (Z). The counter-bracing assembly (21) is sleeved on the outer periphery of the first guide member (25) and can move relative to the first guide member (25). And / or, the moment compensation device (2) further includes a second guide (26), which is disposed in the cavity and is arranged radially between the first column (11) and the counter-bracing assembly (21). The second guide (26) is connected to one of the first column (11) and the counter-bracing assembly (21) and is in contact with the other.

12. The floating wind turbine foundation according to any of claims 1 to 4, characterized in that At least one of the first column (11) of the floating body (1) and the floating body assembly (12) comprises a concrete body.

13. A wind power unit, characterized in that It includes a wind turbine body (200) and a floating wind turbine foundation (100) as described in any one of claims 1 to 12, wherein the wind turbine body (200) is disposed on the first column (11) of the floating wind turbine foundation (100).

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