CN114291219B

CN114291219B - Floating type fan foundation

Info

Publication number: CN114291219B
Application number: CN202111382268.2A
Authority: CN
Inventors: 肖勇; 高杭; 李志刚; 张庆明; 熊春梅; 杨琼; 郭斌; 汤岱; 耿静华
Original assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Current assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-04-11
Anticipated expiration: 2041-11-22
Also published as: CN114291219A

Abstract

The invention provides a floating wind turbine foundation, comprising: a main float; the auxiliary floating body is connected with the main floating body through a connecting arm; and the adjusting component is detachably connected to the auxiliary floating body and adjusts the draft of the auxiliary floating body through the filling state of the internal gas. Therefore, the floating type wind turbine foundation is simple in integral structure, low in manufacturing and installation cost, capable of adapting to different harbor basin depths and water depths of transportation air lines by adjusting the buoyancy, and high in adaptability.

Description

Floating type fan foundation

Technical Field

The invention relates to the technical field of offshore wind power foundations, in particular to a floating type wind turbine foundation.

Background

The floating type wind turbine foundation is a floating body structure floating on the sea surface, is mainly used for placing a wind generating set to carry out offshore power generation operation, and is a main bearing component of offshore wind power generation equipment.

At present, offshore wind power development is concentrated in offshore shallow water areas, and wind power generation foundations mainly adopt fixed structures such as single piles or jackets. With the gradual decrease of land and offshore resources, the development of offshore wind power resources gradually moves to deep water, and the construction and installation costs of the traditional fixed foundation are greatly increased with the increase of water depth, so that the floating foundation suitable for the larger water depth becomes the main foundation form of the offshore wind power development in the future.

In China, the research on floating wind power foundations is more intensive, and various floating foundations are developed. However, most of the foundations still stay in the concept stage, or the requirements of the sea water depth and the environment in China are not met. The coastline of China is relatively flat, the water depth of sea areas is mostly distributed between 30m and 60m, and the sea conditions are severe, especially in the east sea.

The existing floating wind power foundation mainly comprises a tension leg type, a semi-submersible type, a column type and a barge type. Four structural forms have advantages and disadvantages, and the semi-submersible foundation generally has better economy and sea applicability than other forms. However, the existing semi-submersible foundation is either heavy in weight and uneconomical, high in manufacturing and installation cost or poor in comprehensive performance, has no targeted design for the floating foundation in the medium water depth sea area of 30-60 m, and cannot well meet the current requirements of offshore wind power development.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

Therefore, the invention provides a floating wind turbine foundation.

The invention provides a floating wind turbine foundation, comprising: a main float; the auxiliary floating body is connected with the main floating body through a connecting arm; and the adjusting component is detachably connected to the auxiliary floating body and adjusts the draft of the auxiliary floating body through the filling state of the internal gas. The invention provides a floating type fan foundation which comprises a main floating body, an auxiliary floating body, a connecting arm and an adjusting assembly. Wherein, main body is the center of whole basis for connect and bear the weight of fan. Specifically, the upper end of the main floating body is of a cylinder-like structure, the lower end of the main floating body is of a cone-like structure, the waterplane surface of the main floating body is located at the cylinder-like structure, and the cylinder-like structure is connected with the lower end cone-like structure after extending downwards for a certain distance from the waterplane surface. The main floating body column body structure extends downwards from the water line surface for a certain distance, and the volume of the main floating body column body structure is small, so that the acting area of waves on the main floating body is reduced, and the swinging force and the swinging period of the main floating body are improved. The vice body can be three or a plurality of, and evenly connect around main body, in order to constitute triangle-shaped or polygon structure, in addition, the vice body is radius platform structure, its diameter size is decrement progressively by upper end to lower extreme, in order to guarantee vice body radius platform structure from waterline face downwardly extending certain distance, and this part size is little, thereby it is little to guarantee that the vice body receives the effect area of wave effect, further reduce the influence of wave to the vice body, and then improve vice body wave load effect. The volume can be increased above the water line surface of the auxiliary floating body so as to ensure that a larger buoyancy difference can be provided when the floating foundation is inclined. The auxiliary floating body is in a balanced state with the gravity in a still water state, when the floating foundation inclines, the displacement of the auxiliary floating body on one side is increased, and the buoyancy is increased; the auxiliary floating body on the other side tilts upwards, the displacement is reduced, and the buoyancy can be reduced. Thus, the moment created by the combined forces will resist the floating fan from tipping and can reduce the floating foundation tipping angle, restoring the floating fan to the initial equilibrium position. The connecting arms are used for connecting the main floating body and the auxiliary floating body, specifically, the connecting arms are multiple and are formed by welding square or cylindrical rod pieces, and the multiple connecting arms form a polygonal truss structure between the main floating body and the auxiliary floating body. Preferably, a plurality of connection arms are formed in a ladder-shaped structure between the main buoyant body and the sub buoyant body, and the wider end thereof is welded to the main buoyant body and the narrower end thereof is welded to the sub buoyant body to provide a greater bending resistance. The adjusting assembly changes the draft of the auxiliary floating body by adjusting the filling state of the internal gas, so that the buoyancy is changed, the matching between the auxiliary floating bodies is further realized, and the stability of the floating foundation is ensured. The adjusting component can be connected with the auxiliary floating body through connecting modes such as bolts and the like, and is convenient to detach and replace.

Therefore, the floating type wind turbine foundation is simple in integral structure, low in manufacturing and installation cost, capable of adapting to different harbor basin depths and water depths of transportation air lines by adjusting the buoyancy, and high in adaptability.

The floating wind turbine foundation according to the technical scheme of the invention can also have the following additional technical characteristics:

in the above technical solution, the adjusting assembly includes: the bearing piece is detachably connected to the bottom end of the auxiliary floating body; an airbag disposed within the carrier; and one end of the inflation and exhaust hose is communicated with the air bag, and the other end of the inflation and exhaust hose is arranged at the top end of the auxiliary floating body.

In this solution, the adjustment assembly comprises a carrier, an airbag and an inflation/deflation hose. The bearing part is used for bearing the air bag. In particular, the bearing member may be a truss structure and form a single or multiple placing spaces inside for placing the air bags, and the change of the volume of the air bags is realized by inflating or deflating the air bags through the inflating and deflating hoses. Specifically, the air bag is inflated through the inflating and exhausting hose, so that the volume of the air bag is increased, and the draught depth of the floating foundation is reduced; the air bag is deflated through the inflating and exhausting hose, the volume of the air bag is reduced, and the draught depth of the floating foundation is increased. Therefore, the floating foundation can adapt to different depths of harbor ponds and water depths of transportation routes by adjusting the volume of the air bag and adjusting the draft of the floating foundation. In addition, the adjusting assembly can be detached after the fan is installed, the lower bottom surface of the detached main floating body is lower than the lower bottom surface of the detached auxiliary floating body, and therefore on the premise that the stability and dynamic performance of the floating foundation are met, the weight of the floating foundation steel structure can be reduced, and the floating foundation cost is reduced.

In the above technical solution, the main floating body includes: the main body part at least comprises a mounting end higher than a waterline surface for mounting a tower; and the ballast part is arranged on the main body part and is lower than the waterline so as to increase the counterweight of the main floating body.

In this technical solution, the main floating body includes a main body portion and a ballast portion. Wherein the main body portion ensures the installation of the tower. Specifically, a mounting flange is welded on the upper end face of the main body part, and the main body part is connected with the tower barrel in a flange connection mode. The ballast part is used for increasing the balance weight of the main floating body. Specifically, the ballast part can be a cabin body structure, a plurality of cabins are arranged in the ballast part, each cabin is filled with ballast water when the floating type fan works, after the main floating body is ballasted, the gravity center of the floating type foundation can be obviously reduced, and the overall stability of the floating type foundation is improved.

In the above technical solution, the main body portion and the ballast portion are integrally formed, and the connecting arm is at least partially disposed at the ballast portion.

In this aspect, the main body portion and the ballast portion are integrally formed, and the coupling force therebetween can be increased. In particular, a welded connection may be used.

In addition to the above-mentioned technical solution of integrally molding the main body portion and the ballast portion, the main body portion and the ballast portion may be separately provided, and the ballast portion is butted or separated from the main body portion by a retraction assembly, and the connecting arm is connected to the main body portion.

In the technical scheme, the main body part and the ballast part can be arranged separately, so that the performance of the floating foundation in a deep water area is improved. Specifically, set up between main part and ballast portion and receive and release the subassembly, receive and release the subassembly and can drive ballast portion butt joint in order to constitute a whole at the main part, or drive ballast portion transfer and with the main part separation in order to constitute two independent main parts to reduce the centre of gravity height, improve floating fan's stability.

In the above technical solution, the retraction assembly includes: the driving piece is arranged on the connecting arm; and one end of the mooring rope is connected with the driving piece, the other end of the mooring rope is connected with the ballast part, and the ballast part is driven by the driving piece to move upwards to be in butt joint with the main body part or move downwards to be separated from the main body part.

In this technical scheme, receive and release the subassembly and include driving piece and mooring line. The driving piece can be an anchor machine, a winch and the like. The mooring cable is driven by the driving member to move the ballast portion up or down. Specifically, the mooring rope is driven by the driving piece to drive the ballast part to move upwards to the highest position, the highest position is the butt joint of the ballast part and the main body part, preferably, a spigot is arranged on the ballast part and is sleeved or embedded at the lower end of the main body part to limit the left-right shaking of the ballast part, the tight connection of the main body part and the ballast part is completed, and the draught depth of the whole machine during transportation is further reduced. The mooring rope is transferred by the driving piece to drive the ballast part to transfer and reach the specified depth, so as to adapt to different water area working conditions, thereby reducing the height of the whole center of gravity and improving the stability of the floating type fan. Furthermore, the driving members may be provided in groups and arranged on a plurality of connecting arms, the mooring lines being lowered from both sides of the connecting arms.

In the above technical solution, the method further comprises: a locking member provided to the connection arm, and through which the tether passes to be locked or unlocked.

In this solution, a locking element is also included. In particular, the locking member may be a bolt press structure. Specifically, a mounting frame is arranged on the connecting arm, a bolt rod is screwed on the mounting frame, and the bolt rod exerts fastening force on the mooring rope through screwing in to enable the mooring rope to be locked or loses the fastening force on the mooring rope through screwing out to enable the mooring rope to be disengaged. The locking element may also be other locking structures, and is not limited in detail herein.

In the above technical solution, the method further comprises: a guide provided to the connecting arm, and the tether passes through the guide. In this solution, the guide is used to guide the movement of the mooring line. In particular, the guide may be of pulley block construction, the mooring line being connected to the ballast part through the pulley block. Of course, the guide member may be other forms of guide structures, such as: when the mooring cable is a steel wire rope, the mooring cable is placed downwards along the guide piece, the guide piece is of a pulley block structure, and the mooring cable penetrates through the guide piece and is connected to the ballast part; or when the mooring line is an anchor chain, the mooring line is lowered along a guide member, the guide member is a plate-shaped member with a hole in the middle, the guide member is fixedly connected to one side of the connecting arm, and the mooring line passes through the guide member and is connected to the ballast portion.

In any one of the above technical solutions, the sub-float further includes: and the heave plate is arranged at the lower end of the auxiliary floating body, and the adjusting assembly is detachably connected with the heave plate.

In the technical scheme, the auxiliary floating body further comprises a heave plate. The heave plate can be a circular or polygonal plate, the heave plate is welded at the lower end of the auxiliary floating body, reinforcing ribs are arranged around the heave plate, one end of each reinforcing rib is welded at the outer edge of the heave plate, the other end of each reinforcing rib is welded on the auxiliary floating body, so that the additional weight of the platform is increased, the damping force is mainly generated by vortex shedding at the edge of the plate, and in the heave motion, the vortices at the upper edge and the lower edge of the heave plate can generate strong interaction to ensure that the vortex shedding is strengthened, so that the damping is increased; in addition, the heave plate can change the natural vibration frequency of the structure, so that the heave resonance period is far away from the common frequency of waves, and the resonance is avoided.

In any of the above technical solutions, the method further includes: and the mooring system is connected with the auxiliary floating body.

In this solution, a mooring system is also included. In particular, the mooring system is made up of a plurality of mooring chains. Preferably, the mooring chain is connected to the top end of the auxiliary floating body and used for assisting the stability of the auxiliary floating body, and the self weight of the mooring chain can be increased at the top end by considering the water depth of the sea area in China.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of a floating wind turbine foundation (assembled wind turbine) according to one embodiment of the present invention;

FIG. 2 is a perspective view of one embodiment of the floating wind turbine foundation of the present invention (with the adjustment assembly hidden);

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a schematic structural view of a floating wind turbine foundation assembly adjustment assembly according to one embodiment of the present invention;

FIG. 6 is a block diagram of the bearings in the floating wind turbine foundation of FIG. 5;

FIG. 7 is one of the front views of a floating wind turbine foundation (with the body portion and ballast portion docked) according to another embodiment of the present invention;

fig. 8 is a second front view of a floating wind turbine foundation of another embodiment of the present invention (with the main body portion and ballast portion separated);

FIG. 9 is a top view of a floating wind turbine foundation according to another embodiment of the present invention;

fig. 10 is an enlarged view of fig. 9 at a.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

the mooring system comprises a main floating body 1, a main body 11, a ballast part 12, a retraction assembly 13, a driving member 131, a mooring line 132, a locking member 133, a guiding member 134, a secondary floating body 2, a heave plate 21, a connecting arm 3, a regulating assembly 4, a bearing member 41, an air bag 42, an inflation and deflation hose 43 and a mooring system 5.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

A floating wind turbine foundation provided in accordance with some embodiments of the present invention is described below with reference to fig. 1-10.

Some embodiments of the present application provide a floating wind turbine foundation.

As shown in fig. 1 to 4, a first embodiment of the present invention provides a floating wind turbine foundation, including: a main floating body 1; the auxiliary floating body 2 is connected with the main floating body 1 through a connecting arm 3; and the adjusting component 4 is detachably connected to the auxiliary floating body 2 and adjusts the draft of the auxiliary floating body 2 through the filling state of the internal gas.

The invention provides a floating type fan foundation which comprises a main floating body 1, an auxiliary floating body 2, a connecting arm 3 and an adjusting assembly 4. The main floating body 1 is the center of the whole foundation and is used for connecting and bearing a fan. Specifically, the upper end of the main floating body 1 is of a cylinder-like structure, the lower end of the main floating body is of a cone-like structure, the water plane of the main floating body 1 is located at the position of the cylinder-like structure, and the cylinder-like structure is connected with the lower end of the cone-like structure after extending downwards for a certain distance from the water plane. The 1-class cylinder structure of the main floating body extends downwards for a certain distance from the waterline surface, and the volume size of the part is small, so that the acting area of the wave on the main floating body 1 is reduced, and the swinging force and the swinging period of the main floating body 1 are improved. The auxiliary floating body 2 can be three or more, and evenly connect around main floating body 1, in order to constitute triangle-shaped or polygonal structure, in addition, auxiliary floating body 2 is the inverted frustum structure, its diameter size is decrement progressively by upper end to lower extreme, in order to guarantee that the 2 inverted frustum structures of auxiliary floating body extend certain distance from the waterline face downwards, and this part size is little, thereby it is little to ensure that the area of action that receives the wave effect below the 2 waterline faces of auxiliary floating body is little, further reduce the influence of wave to the auxiliary floating body, and then improve the wave load effect of auxiliary floating body. The volume increase can be arranged above the water line surface of the auxiliary floating body 2 so as to ensure that a larger buoyancy difference can be provided when the floating foundation is inclined. The buoyancy and the gravity of the auxiliary floating body 2 are in a balanced state in a still water state, when the floating foundation inclines, the displacement of the auxiliary floating body 2 on one side is increased, and the buoyancy is increased; the auxiliary floating body 2 on the other side tilts upwards, the displacement is reduced, and the buoyancy can be reduced. Thus, the moment created by the combined forces will resist the floating fan from tipping and can reduce the floating foundation tipping angle, restoring the floating fan to the initial equilibrium position. The connecting arms 3 are used for connecting the main floating body 1 and the auxiliary floating body 2, specifically, the connecting arms 3 are multiple and formed by welding square or cylindrical rod pieces, and the multiple connecting arms 3 form a polygonal truss structure between the main floating body 1 and the auxiliary floating body 2. Preferably, a plurality of connecting arms 3 are formed in a trapezoidal structure between the main floating body 1 and the sub-floating body 2, and the wider end thereof is welded to the main floating body 1 and the narrower end thereof is welded to the sub-floating body 2 to provide a greater bending resistance. The adjusting component 4 changes the draft of the auxiliary floating body 2 by adjusting the filling state of the internal gas, so that the buoyancy is changed, the matching between the auxiliary floating bodies 2 is further realized, and the stability of the floating foundation is ensured. The adjusting component 4 can be connected with the auxiliary floating body 2 through bolts and other connecting modes, and is convenient to detach and replace.

A floating wind turbine foundation is proposed in a second embodiment of the present invention, and based on the first embodiment, as shown in fig. 5 and 6, the adjusting unit 4 includes: the carrier 41 is detachably connected to the bottom end of the auxiliary floating body 2; an airbag 42 provided in the carrier 41; and one end of the inflation and exhaust hose 43 is communicated with the air bag 42, and the other end is arranged at the top end of the auxiliary floating body 2.

In the present embodiment, the adjustment assembly 4 includes a carrier 41, an air bag 42, and an inflation/deflation hose 43. The carrier 41 is used to carry the airbag 42. Specifically, the carrier 41 may be a truss structure, and a single or multiple placing spaces are formed inside for placing the air bag 42, and the change of the volume of the air bag 42 is realized by inflating or deflating the air bag 42 through the inflating and deflating hose 43. Specifically, the air bag 42 is inflated through the inflation and exhaust hose 43, the volume of the air bag 42 is increased, and the floating foundation draft is reduced; the air bag 42 is deflated through the air inflation and exhaust hose 43, the volume of the air bag 42 is reduced, and the draught depth of the floating foundation is increased. Therefore, the floating foundation can adapt to different basin depths and water depths of a transportation route by adjusting the volume of the air bag 42 and adjusting the draught of the floating foundation. In addition, the adjusting component 4 can be detached after the fan is installed, and the lower bottom surface of the main floating body 1 is lower than that of the auxiliary floating body 2 after the adjustment component is detached, so that the weight of a floating foundation steel structure can be reduced and the floating foundation cost can be reduced on the premise of meeting the floating foundation stability and dynamic performance.

A third embodiment of the present invention provides a floating wind turbine foundation, and on the basis of any of the above embodiments, the main floating body 1 includes: the main body part 11, wherein the main body part 11 at least comprises a mounting end higher than a water line surface for mounting a tower; and a ballast part 12 provided to the body part 11 and lower than the water line, for increasing a weight of the main floating body 1.

In the present embodiment, the main floating body 1 includes a main body portion 11 and a ballast portion 12. Wherein the main body 11 ensures the installation of the tower. Specifically, a mounting flange is welded on the upper end face of the main body portion 11, and the tower drum is connected through the flange connection mode. The ballast part 12 is used to increase the weight of the main floating body 1. Specifically, the ballast part 12 may be a cabin structure, a plurality of cabins are arranged inside the cabin structure, each cabin is filled with ballast water when the floating fan works, and after the main floating body 1 is ballasted, the center of gravity of the floating foundation can be obviously reduced, and the overall stability of the floating foundation is improved.

A fourth embodiment of the present invention provides a floating wind turbine foundation, and in any of the above embodiments, as shown in fig. 1 to 4, the main body 11 and the ballast portion 12 are integrally formed, and the connecting arm 3 is at least partially disposed in the ballast portion 12.

In the present embodiment, the main body portion 11 and the ballast portion 12 are integrally formed, so that the coupling force therebetween can be improved. In particular, a welded connection may be used.

A fifth embodiment of the present invention provides a floating wind turbine foundation, and based on the third embodiment, as shown in fig. 7 and 8, the main body 11 and the ballast portion 12 are separately provided, the ballast portion 12 is butted against or separated from the main body 11 by a retraction assembly 13, and the connecting arm 3 is connected to the main body 11.

In this embodiment, the main body 11 and ballast 12 may also be provided separately to improve the performance of the floating foundation in deep water. Specifically, a retraction assembly 13 is arranged between the main body part 11 and the ballast part 12, and the retraction assembly 13 can drive the ballast part 12 to be in butt joint with the main body part 11 to form a whole, or drive the ballast part 12 to be placed downwards and separated from the main body part 11 to form two independent main bodies, so that the height of the center of gravity is reduced, and the stability of the floating type fan is improved.

A sixth embodiment of the present invention provides a floating wind turbine foundation, and on the basis of embodiment 5, the retraction assembly 13 includes: a driving member 131 provided to the link arm 3; one end of the mooring line 132 is connected to the driving member 131, and the other end thereof is connected to the ballast portion 12, and the ballast portion 12 is driven by the driving member 131 to move up to be in butt joint with the main body portion 11 or move down to be separated from the main body portion 11.

In this embodiment, the retraction assembly 13 includes a drive member 131 and a tether 132. The driving member 131 may be an anchor, a winch, or the like. The mooring line 132 is driven by the driving member 131 to move the ballast portion 12 up or down. Specifically, the mooring cable 132 is driven by the driving member 131 to drive the ballast portion 12 to move up to the highest position, which is the butt joint between the ballast portion 12 and the main body portion 11, and preferably, a spigot is provided on the ballast portion 12, and the spigot is sleeved or embedded at the lower end of the main body portion 11 to limit the left and right shaking of the ballast portion 12, so as to complete the tight connection between the main body portion 11 and the ballast portion 12, and further reduce the draught depth of the whole machine during transportation. Mooring line 132 is transferred by driving piece 131 to drive ballast portion 12 and transfer and reach the specified degree of depth, with the different waters operating mode of adaptation, thereby reduce whole centre of gravity height, improve floating fan's stability. Furthermore, the driving members 131 may be provided in multiple sets and arranged on a plurality of connecting arms 3, with the mooring lines 132 lowered from both sides of the connecting arms 3.

A seventh embodiment of the present invention provides a floating wind turbine foundation, and on the basis of embodiment 6, as shown in fig. 9 and 10, the floating wind turbine foundation further includes: a locking member 133 provided to the connecting arm 3, and the tether 132 passes through the locking member 133 to be locked or unlocked.

In this embodiment, a locking member 133 is further included. Specifically, the locking piece 133 may be a bolt-pressing structure. Specifically, a mounting bracket is provided on the connecting arm 3, to which a bolt shank is screwed, which applies a fastening force to the tether 132 by screwing in to lock it, or loses the fastening force to the tether 132 by screwing out to release it. The locking member 133 may also be other locking structures, and is not limited in detail.

An eighth embodiment of the present invention provides a floating wind turbine foundation, and on the basis of embodiment 6, as shown in fig. 10, the floating wind turbine foundation further includes: a guide 134 is provided to the connecting arm 3, and the tether 132 passes through the guide 134.

In this embodiment, the guide 134 is used to guide the movement of the tether 132. Specifically, the guide 134 may be a pulley block structure through which the tether 132 is connected to the ballast. Of course, the guide 134 may also be other forms of guide structures, such as: when the mooring line 132 is a wire rope, it is lowered along the guide 134, the guide 134 being a pulley arrangement, the mooring line 134 passing through the guide 134 to be connected to the ballast portion 12; or down guide 134 when mooring line 132 is a chain, guide 134 is a plate-like member with a hole in the middle, guide 134 is fixedly attached to one side of connecting arm 31, and mooring line 132 is connected to ballast section 12 through guide 134.

A ninth embodiment of the present invention provides a floating wind turbine foundation, and on the basis of any of the above embodiments, the auxiliary floating body 2 further includes: and the heave plate 21 is arranged at the lower end of the auxiliary floating body 2, and the adjusting assembly 4 is detachably connected with the heave plate 21.

In this embodiment, the sub-floating body 2 further includes a heave plate 21. The heave plate 21 can be a circular or polygonal plate, the heave plate 21 is welded at the lower end of the auxiliary floating body 2, reinforcing ribs are arranged around the heave plate 21, one end of each reinforcing rib is welded at the outer edge of the heave plate 21, the other end of each reinforcing rib is welded on the auxiliary floating body 2, so that the additional weight of the platform is increased, the damping force is mainly generated by vortex shedding at the edge of the plate, and in the heave motion, vortexes at the upper edge and the lower edge of the heave plate 21 can generate strong interaction to ensure that the vortex shedding is strengthened, so that the damping is increased; in addition, the heave plate 21 can change the self-oscillation frequency of the structure, so that the heave resonance period is far away from the common frequency of waves, and the resonance is avoided.

A tenth embodiment of the present invention provides a floating wind turbine foundation, and on the basis of any of the above embodiments, as shown in fig. 1 to 4, the floating wind turbine foundation further includes: and a mooring system 5 connected with the auxiliary floating body 2.

In this embodiment, a mooring system 5 is also included. Specifically, the mooring system 5 is composed of a plurality of mooring chains, the mooring chains are connected to the top end of the auxiliary floating body 2 and used for assisting the stability of the auxiliary floating body 2, and the self weight of the mooring chains can be increased at the top end by considering the water depth of the sea area in China.

In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A floating wind turbine foundation, comprising:

the upper end of the main floating body is of a cylinder-like structure, the lower end of the main floating body is of a cone-like structure, and the cylinder-like structure extends downwards and is connected with the cone-like structure;

the auxiliary floating body is connected with the main floating body through a connecting arm;

the adjusting assembly is detachably connected to the auxiliary floating body and adjusts the draft of the auxiliary floating body through the filling state of the internal gas;

the water line surface of the main floating body is positioned at the similar cylinder structure part, and the similar cylinder structure extends downwards from the water line surface for a certain distance and then is connected with the similar cone structure at the lower end; the auxiliary floating bodies are uniformly connected around the main floating body to form a triangular or polygonal structure, and the diameter of each auxiliary floating body is gradually reduced from the upper end to the lower end so as to ensure that the inverted circular truncated cone structure of each auxiliary floating body extends downwards for a certain distance from a water plane.

2. The floating wind turbine foundation of claim 1, wherein the adjustment assembly comprises:

the bearing piece is detachably connected to the bottom end of the auxiliary floating body;

an airbag disposed within the carrier;

and one end of the inflation and exhaust hose is communicated with the air bag, and the other end of the inflation and exhaust hose is arranged at the top end of the auxiliary floating body.

3. The floating wind turbine foundation of claim 2, wherein the main buoy comprises:

the main body part at least comprises a mounting end higher than a water line surface for mounting a tower;

and the ballast part is arranged on the main body part and is lower than the waterline so as to increase the counterweight of the main floating body.

4. The floating wind turbine foundation of claim 3,

the main body portion and the ballast portion are integrally formed, and the connecting arm is at least partially disposed in the ballast portion.

5. The floating wind turbine foundation of claim 3,

the main body part and the ballast part are arranged separately, the ballast part is in butt joint with or separated from the main body part through a retraction assembly, and the connecting arm is connected to the main body part.

6. The floating wind turbine foundation of claim 5, wherein the retraction assembly comprises:

the driving piece is arranged on the connecting arm;

and one end of the mooring rope is connected with the driving piece, the other end of the mooring rope is connected with the ballast part, and the ballast part is driven by the driving piece to move upwards to be in butt joint with the main body part or move downwards to be separated from the main body part.

7. The floating wind turbine foundation of claim 6, further comprising:

a locking member provided to the connection arm, and through which the tether passes to be locked or unlocked.

8. The floating wind turbine foundation of claim 6, further comprising:

a guide provided to the connecting arm, and the tether passes through the guide.

9. The floating wind turbine foundation of any one of claims 1 to 8, wherein the secondary buoyant body further comprises:

and the heave plate is arranged at the lower end of the auxiliary floating body, and the adjusting assembly is detachably connected with the heave plate.

10. The floating wind turbine foundation of any one of claims 1 to 8, further comprising:

and the mooring system is connected with the auxiliary floating body.