A floating type fan supporting structure and a fan power generation structure

Abstract

The application relates to a floating wind turbine supporting structure and wind turbine power generation structure. The supporting structure comprises a supporting platform, a float unit and a mooring. The supporting platform is used for installing a wind turbine. The float unit comprises an upper float and a lower float. The upper float and the lower float are connected through a flexible cable. The lower float is fixedly connected to the supporting platform. The float unit is configured so that the upper float floats on the water surface, and the lower float is located below the water surface. One end of the mooring is fixedly connected to the lower float and / or the supporting platform, and the other end is used for being fixedly connected to the seabed. When the sea wave acts on the supporting structure, the swing range of the upper float is larger than that of the lower float and the supporting structure, and the swing range of the lower float and the supporting platform fixedly connected to the lower float is smaller. The swing of the upper float balances the swing of the lower float and the supporting platform through the flexible cable, so that the supporting platform can quickly recover to be stable, and a stable production environment is provided for the wind turbine. Meanwhile, the service life of the entire wind power generation device including the supporting structure is prolonged, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the offshore wind power generation technical field, and in particular to a floating wind turbine support structure and a wind turbine power generation structure. BACKGROUND

[0002] At present, offshore wind power generation is an important part of clean energy. Since the wind turbine is installed on the sea, for the sea area with a water depth exceeding 50 meters, a floating wind turbine support structure is generally used.

[0003] The floating wind turbine support structure is divided into four basic forms of barge type, single column type, semi-submersible type and tension leg type, wherein the semi-submersible foundation is a structure form in line with the water depth conditions of China's seas. The current semi-submersible foundation support structure uses a connecting beam and multiple floating pontoons as a support structure, wherein the connecting beam is composed of beams arranged in multiple directions such as cross beams, inclined beams and vertical beams, the multiple floating pontoons are distributed on the connecting beam and fixedly connected with the connecting beam, and the multiple connecting beams form a platform, and the wind turbine is installed on the platform. Due to the influence of waves, the floating pontoons and the connecting beams sway too much, which affects the normal use of the wind turbine and greatly shortens the service life of the entire wind power generation device and greatly increases the maintenance cost. SUMMARY

[0004] Based on this, the present application provides a floating wind turbine support structure to solve the problem that the support structure sways too much and thus affects the service life of the wind power generation device and increases the maintenance cost. It comprises:

[0005] A support table for installing a wind turbine;

[0006] A floater unit comprising an upper floating pontoon and a lower floating pontoon, the upper floating pontoon and the lower floating pontoon being connected by a flexible cable, the lower floating pontoon being fixedly connected to the support table, the floater unit being configured such that the upper floating pontoon floats on the water surface and the lower floating pontoon is located below the water surface;

[0007] A mooring, one end of which is fixedly connected with the lower floating pontoon and / or the support table, and the other end of which is used for fixedly connecting with the seabed.

[0008] In one embodiment, a damper is installed on the upper floating pontoon, the damper comprising a hollow U-shaped tube and a perforated partition plate, the perforated partition plate being located in the inner cavity of the hollow U-shaped tube and dividing the inner cavity of the hollow U-shaped tube into two parts, a through hole being formed in the perforated partition plate, and a liquid being arranged in the hollow U-shaped tube and being capable of flowing from one part of the inner cavity to the other part of the inner cavity through the through hole.

[0009] In one embodiment, a plurality of dampers are uniformly arranged along the circumference of the upper floating pontoon.

[0010] In one embodiment, a winch is arranged on the upper floating pontoon, the flexible cable being wound on the winch, and the winch being configured to adjust the distance between the upper floating pontoon and the lower floating pontoon by rotating.

[0011] In one of the embodiments, the lower float is hollow and has a plurality of partitions installed inside, the inner cavity of the lower float is divided into a plurality of installation spaces by the partitions, and at least part of the installation spaces are provided with counterweight members.

[0012] In one of the embodiments, the projection profile of the support platform in the direction perpendicular to the water surface is triangular.

[0013] In one of the embodiments, the support platform comprises a plurality of beams, the plurality of beams are connected, and the extension directions of the plurality of beams are located in the same plane.

[0014] In one of the embodiments, in the projection profile, the area with a distance from at least three vertices of the triangle within a preset range is an installation area for installing the float unit.

[0015] In one of the embodiments, the installation position of the fan is located on any side of the triangle in the projection profile.

[0016] The application also provides a fan power generation structure comprising the floating fan support structure of any one of the above embodiments and a fan.

[0017] The above floating fan support structure (hereinafter referred to as support structure) is used for supporting a fan. First, the main part of the support structure is a support platform, which is used for installing a fan for power generation. The stability function is responsible for the float unit, which comprises an upper float and a lower float. The upper float and the lower float are connected by a flexible cable. The lower float is fixedly connected to the support platform. The upper float floats on the water surface, and the lower float sinks below the water surface. When the sea waves act on the support structure, the upper float will sway more than the lower float and the support structure because it floats on the water surface. The sway amplitude of the lower float and the support platform fixedly connected thereto is smaller. Moreover, since the upper float and the lower float are connected by a flexible cable rather than a rigid connection, the influence of the upper float on the lower float and the support platform is smaller, thereby facilitating the rapid recovery of the support platform to stability. Finally, the support structure and the seabed are connected by mooring, which also enhances the stability of the support platform, so that the entire support structure can maintain good stability under the action of sea waves. Since the support structure provided by the application has small sway amplitude and strong stability, it can provide a stable production environment for the fan, prolong the service life of the entire wind power generation device including the support structure, and reduce the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an isometric side view of the fan power generation structure of one of the embodiments;

[0019] Figure 2 It is a side view of the embodiment; Figure 1

[0020] ​Figure 3 This is a front view of the float unit structure;

[0021] Figure 4 for Figure 3 A cross-sectional view of the AA upper buoy;

[0022] Figure 5 for Figure 3 Cross-sectional view of the BB's lower buoy;

[0023] Figure 6 for Figure 3 Longitudinal cross-section of the CC float unit;

[0024] Figure 7 for Figure 4 A cross-sectional view of a D-DU type tuned liquid column damper.

[0025] Reference numerals: Float unit 100; Upper float 110; Damper 111; Hollow U-tube 1111; Perforated bulkhead 1112; Liquid 1113; Winch 112; Upper bulkhead 113; Lower float 120; Lower bulkhead 121; Flexible cable 130; Support platform 200; Crossbeam 210; Mooring 300; Heave plate 400; Fan 500; Maintenance deck 510; Ladder 520. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second" can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes, and are not the only embodiment.

[0032] Reference Figure 1 , Figure 1As a schematic view of a wind turbine power generation structure, the present application provides a floating wind turbine support structure, comprising a support, a float unit 100 and a mooring 300, a support platform 200 for installing a wind turbine 500; the float unit 100 comprises an upper float 110 and a lower float 120, the upper float 110 and the lower float 120 are connected by a flexible cable 130, the lower float 120 is fixedly connected to the support platform 200, the float unit 100 is configured to float the upper float 110 on the water surface, and the lower float 120 is located below the water surface; one end of the mooring 300 is fixedly connected to the lower float 120 and / or the support platform 200, and the other end is used for fixedly connecting to the seabed.

[0033] Referring to Figure 1 and Figure 2 , Figure 2 is a side view of the wind turbine power generation structure arranged in the sea surface, the wind turbine 500 is installed on the support platform 200, and the float unit 100 is distributed on the support platform 200, wherein the float unit 100 is divided into the upper float 110 and the lower float 120, the lower float 120 is fixedly connected to the support platform 200 to connect the float unit 100 and the support platform 200, the upper float 110 and the lower float 120 are connected by the flexible cable 130, the upper float 110 floats on the water surface, and the lower float 120 is located below the water surface, it can be clearly seen that the entire support structure mainly relies on the upper float 110 in the float unit 100 to maintain the floating state; one end of the mooring 300 is tied to the lower float 120, and the other end is fixedly connected to the seabed.

[0034] The support structure main body part is a support platform 200, which is used to install a wind turbine 500 for the wind turbine 500 to generate electricity. The stability function is responsible for the floater unit 100. When the sea waves act on the support structure, the upper float 110 is shaken to a larger extent than the lower float 120 and the support structure because the upper float 110 floats on the water surface and the lower float 120 is located below the water surface. Moreover, compared with the large column-float integrated structure used in the conventional semi-submersible foundation, the upper float 110 has a large part of the volume above the water surface, and the underwater force area is smaller, so the overall wave-encountering surface of the support structure is significantly reduced, which is conducive to reducing the influence of wave loads and improving the stability of the support structure. The lower float 120 and the support platform 200 fixedly connected thereto are shaken to a smaller extent, and because the upper float 110 and the lower float 120 are connected by a flexible cable 130 instead of a rigid connection, the shaking of the upper float 110 balances the shaking of the lower float 120 and the support platform 200, thereby facilitating the support platform 200 to quickly recover to be stable; finally, the mooring 300 connects the support structure and the seabed, which also enhances the stability of the support platform 200, so that the entire support structure can maintain good stability under the action of sea waves. The support structure designed in this way has a small shaking range and strong stability, so it can provide a stable production environment for the wind turbine 500, and at the same time prolongs the service life of the entire wind power generation device including the support structure and reduces the maintenance cost.

[0035] In other embodiments, one end of the mooring 300 can also be fixed to the support platform 200, or a plurality of moorings 300 are partially connected to the support platform 200 and partially connected to the lower float 120, to achieve a better effect of stabilizing the support structure.

[0036] Preferably, in one of the embodiments, the lower end of the lower float 120 is provided with a heaving plate 400, and the area of the heaving plate 400 is larger than the cross-sectional area of the lower float 120. The heaving plate 400 can increase the added mass and viscous damping of the lower float 120 to achieve a better stability effect.

[0037] Figure 3 It is a front view of the floater unit 100 structure; Figure 4 It is a transverse sectional view of the upper float 110; Figure 7 It is a sectional view of the damper 111.

[0038] Reference is made to Figure 3 , Figure 4 and Figure 7In one embodiment, the upper floating cylinder 110 is provided with a damper 111, which comprises a hollow U-shaped tube 1111 and an open hole partition 1112. The open hole partition 1112 is located in the inner cavity of the hollow U-shaped tube 1111 and divides the inner cavity of the hollow U-shaped tube 1111 into two parts. The open hole partition 1112 is provided with a through hole. The hollow U-shaped tube 1111 is provided with a liquid 1113, which can pass through the through hole.

[0039] The shape of the floater unit 100 and the position and structure of the damper 111 in the upper floating cylinder 110 can be seen in combination with the three drawings. In Figure 4 the damper 111 is installed in the upper floating cylinder 110. Referring to Figure 7 , it can be seen that the shape of the damper 111 is U-shaped, and the main structure is a hollow U-shaped tube 1111. In the hollow U-shaped tube 1111, the damper 111 is provided with an open hole partition 1112, which divides the inner cavity of the hollow U-shaped tube into two parts. The open hole partition 1112 is provided with a through hole. Please refer to Figure 7 , the open hole partition 1112 has multiple gaps, i.e. through holes. The hollow tube is provided with a liquid 1113. When the hollow tube shakes, the liquid 1113 will flow, thereby flowing from one part of the inner cavity to another part of the inner cavity through the through hole.

[0040] When the support structure is subjected to the action of waves on the sea surface, the upper floating cylinder 110 will shake left and right and up and down, thereby driving the damper 111 on the upper floating cylinder 110 to shake, causing the liquid 1113 in the hollow U-shaped tube 1111 to flow. When the liquid 1113 passes through the open hole partition 1112 located at the middle section of the hollow U-shaped tube 1111, a strong shear flow is generated, and eddies are formed due to the viscosity of the liquid 1113. The external input energy will be consumed with the dissipation of the eddies. The arrangement of the damper 111 can effectively alleviate the shaking of the support structure and the tension of the flexible cable 130, so that the support structure can recover to a stable state more quickly, thereby bringing a stable working environment for the wind turbine 500 and prolonging the service life of the entire structure and reducing maintenance costs.

[0041] In one embodiment, the damper 111 can be arranged outside the upper floating cylinder 110 instead of inside the upper floating cylinder 110.

[0042] In one embodiment, the plurality of dampers 111 are uniformly arranged along the circumference of the upper floating cylinder 110.

[0043] Referring to Figure 4 , in one embodiment, it can be seen from the top view that four dampers 111 are installed, and adjacent two dampers 111 are uniformly arranged at 90 degrees around. The four dampers 111 can cope with waves acting in different directions, and the effect of the four dampers 111 is better than that of one damper 111.

[0044] Preferably, in some embodiments, 6 or 8 dampers 111 can also be provided, i.e. more angles facing the waves, better effect.

[0045] Preferably, in one embodiment, the upper float 110 can be provided with upper partitions 113 to divide the upper float 110 into multiple small spaces, and multiple dampers 111 are placed in the multiple small spaces, so that the dampers 111 can be more stably fixed in the upper float 110, and the multiple dampers 111 can also be prevented from colliding under the action of waves.

[0046] In one embodiment, referring to Figure 3 and Figure 4 It can be seen that four rectangular upper partitions 113 and one cylindrical upper partition 113 are provided in the upper float 110 to divide the upper float 110 into five spaces, and four dampers 111 are respectively arranged in the four peripheral spaces. This arrangement can make the mass distribution of the upper float more uniform, and the center of gravity stable, so as to affect the stability of the support structure.

[0047] Similarly, in other embodiments, various shapes of upper partitions 113 can also be used to divide the space of the upper float 110, so as to add other equipment to enhance the stability of the support structure.

[0048] In one embodiment, the upper float 110 is provided with a winch 112, and the flexible cable 130 is wound on the winch 112. The winch 112 is configured to adjust the distance between the upper float 110 and the lower float 120 by rotating.

[0049] Referring to Figure 4 and Figure 6 , Figure 6 is a sectional view of the float unit 100. From the top view and the front view, it can be seen that the winch 112 is located in the upper float 110 and has the flexible cable 130 wound thereon. When the winch 112 rotates, the length of the flexible cable 130 between the upper float 110 and the lower float 120 can be shortened or increased, so as to adjust the distance between the upper float 110 and the lower float 120. When the support structure is shipped to the use site, the upper float 110 and the lower float 120 can be brought into contact with each other by the winch 112, so as to reduce the transportation volume and keep the float unit 100 stable as a whole to avoid damage, and also to reduce the transportation cost. When the support structure is in use, according to the situation of different sea areas, the distance between the upper float 110 and the lower float 120 is purposefully lengthened or shortened, i.e. the depth of the lower float 120 and the support platform 200 below the water surface is adjusted, so as to better control the center of gravity and stability of the support structure.

[0050] Preferably, in some embodiments, a plurality of winches 112 can be configured as the number of flexible steel cables varies.

[0051] In other embodiments, other devices can also be used to control the length of the flexible cable 130.

[0052] Referring to Figure 5 , Figure 5 is a top view of the lower float 120. In one embodiment, the lower float 120 is hollow and has a plurality of lower partitions 121 installed inside. The inner cavity of the lower float 120 is divided into a plurality of installation spaces by the lower partitions 121, and at least some of the installation spaces are provided with counterweights.

[0053] As can be seen, the inner cavity of the lower float 120 is divided into five spaces by the plurality of lower partitions 121. The lower float 120 can be installed with counterweights in some or all of the spaces to increase the mass. The lower float 120 plays a role in lowering the center of gravity during use to control the overall stability of the entire support structure. Depending on the different conditions of the sea area, the lower float 120 can be placed with different weights of counterweights. Since the upper float 110 floats on the water surface and the lower float 120 is located below the water surface, the heavier lower float 120 will not sink to the seabed due to the tension of the flexible cable 130, and the flexible cable 130 will remain taut under the action of the gravity of the lower float 120. Compared to the continuous bending of the flexible cable 130 until it is fatigued and broken, the service life of the flexible cable 130 will be greatly increased when it is in a taut state.

[0054] Preferably, in one embodiment, the flexible cable 130 can use a steel cable.

[0055] Preferably, in some embodiments, different masses of counterweights can be placed in different spaces of the lower float 120. Since the wave forces in different directions are different under different weather conditions in different sea areas, the center of gravity of the support structure can be adjusted by placing counterweights of different masses to adapt to the waves. The lower partitions 121 can limit the movement of the counterweights in the lower float 120 to prevent different counterweights from mixing together and affecting the stability of the support structure.

[0056] Similarly, instead of being limited to the five spaces in the above embodiment, other dividing members can be used in the lower float 120 to form a plurality of spaces of different shapes, instead of being limited to the four spaces of the same shape and the cylindrical space in the middle as shown in Figure 4 .

[0057] Referring to Figure 1 , in one embodiment, the projection profile of the support platform 200 in the direction perpendicular to the water surface is triangular.

[0058] By Figure 1It can be seen that the projection profile of the support platform 200 along the direction perpendicular to the water surface is a triangle, and the triangle is more stable than other polygonal structures.

[0059] Preferably, referring to Figure 1 In some embodiments, the projection profile of the support platform 200 along the direction perpendicular to the water surface is an equilateral triangle, and the equilateral triangle has better structural strength and stability than the ordinary triangle.

[0060] Similarly, in some embodiments, according to different sea areas and climate change rules, the projection profile of the support platform 200 along the direction perpendicular to the water surface can also be an ordinary acute triangle, a right triangle, or an obtuse triangle.

[0061] In other embodiments, the support platform 200 can be provided as a three-dimensional structure instead of a planar structure as shown in Figure 1 The three-dimensional structure has better structural strength than the planar structure.

[0062] Referring to Figure 1 and Figure 2 In one embodiment, the support platform 200 includes a plurality of beams 210, the plurality of beams 210 are connected, and the extension directions of the plurality of beams 210 are located in the same plane.

[0063] Referring to Figure 1 and Figure 2 It can be seen from different perspectives that the support platform 200 is a planar structure, the plurality of beams 210 are connected in a plane to form the support platform 200, that is, the extension directions of the plurality of beams 210 are in a plane. The planar structure can be completely submerged under the water surface with the lower float 120 to lower the center of gravity, so that the support structure has better stability, and the economic cost is lower due to the reduction of materials.

[0064] In one embodiment, the plurality of beams 210 can use steel pipes of the same material to ensure the connection strength and reduce the economic cost.

[0065] In one embodiment, in the projection profile, at least the distance between the three vertices of the triangle located in the preset range is an installation area for installing the float unit 100.

[0066] Referring to Figure 1 In Figure 1In the shown embodiment, there are five float units 100, three of which are located at the three vertices of the support platform 200, and the remaining two are located at the middle of two edges of the support platform 200. The float units 100 arranged at the vertices can maximize the use of the pontoons 110 to enclose the support platform 200, so that the swing range of the support platform 200 is smaller than that of the support platform 200 with all the float units 100 installed inside the support platform 200.

[0067] In one embodiment, the float units 100 can also be installed at positions close to the vertices, for example, at two positions on the two edges 2 meters away from the vertices. In different sea areas, the effect of the float units 100 will be better in the same area with more float units 100. This arrangement can maximize the effect of the float units 100 while avoiding the collision of adjacent float units 100, and at the same time, improve the stability of the support structure.

[0068] Preferably, in one embodiment, the support platform 200 can be composed of multiple small triangular trusses to form a large triangular truss, so that multiple float units 100 are installed at the vertices of the small triangular trusses, such as Figure 1 The support platform 200 in the embodiment of is composed of four small triangular trusses to form a large triangular truss. The float units 100 are installed at the vertices of the small triangular trusses connected to each other, which not only improves the stability, but also improves the structural strength of the support platform 200.

[0069] Preferably, when the triangular truss is an equilateral triangle, refer to Figure 1 , Figure 1 The support platform 200 in the embodiment of is composed of four small triangular trusses to form a large equilateral triangular truss, which has the same beneficial effects as the above-mentioned embodiment. In this embodiment, the equilateral triangle is selected for better structure than other ordinary triangles.

[0070] Preferably, in one embodiment, when the triangular truss is large or more float units 100 are needed, more small triangular trusses can be used to form the triangular truss.

[0071] In one embodiment, the installation position of the fan 500 is located on any one edge of the triangular projection contour.

[0072] Refer to Figure 1 and Figure 2, the fan 500 is installed at the middle part of one of the edges of the support platform 200, compared with the fan 500 being installed inside the support platform 200 or at the vertex, the installation on the edge can facilitate the maintenance and inspection of the ship or other ships, and since the installation does not occupy the vertex position, one of the three vertex float units 100 loses the buoyancy function, and the entire support structure will not be tilted excessively to overturn.

[0073] Similarly, in some other embodiments, when the middle parts of the three edges of the support platform 200 are all installed with the float units 100, the fan 500 can be installed at any position of any edge, such as a position one third away from the end point of the edge or a position one fourth away from the end point of the edge, and the installation position is not fixed, which will not be described here.

[0074] The application also provides a wind turbine power generation structure, comprising the floating wind turbine support structure of any one of the above embodiments, and further comprising a fan 500, referring to Figure 1 The fan 500 comprises a maintenance deck 510 and a ladder 520 installed on the fan 500, so as to facilitate the entry of workers into the interior of the fan 500 for maintenance and inspection.

[0075] The technical features of the above embodiments can be combined in any manner, and in order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0076] The above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A floating wind turbine support structure for supporting a wind turbine, characterised in that, The application relates to a floating wind turbine support structure, comprising: a support platform for mounting the wind turbine; a float unit comprising an upper float and a lower float, the upper float and the lower float being connected by a flexible cable, the lower float being fixedly connected to the support platform, the float unit being configured such that the upper float floats on the water surface and the lower float is located below the water surface; a mooring, one end of the mooring being fixedly connected to the lower float and / or the support platform, and the other end being used for fixedly connecting to the seabed; a winch is arranged on the upper float, the flexible cable being wound on the winch, the winch being configured to adjust the distance between the upper float and the lower float by rotating; the lower float is hollow and internally provided with a plurality of lower partitions, the inner cavity of the lower float being divided into a plurality of mounting spaces by the lower partitions, at least part of the mounting spaces being provided with counterweight members.

2. A floating wind turbine support structure according to claim 1, wherein, a damper is arranged on the upper float, the damper comprising a hollow U-shaped pipe and a perforated partition, the perforated partition being located in the inner cavity of the hollow U-shaped pipe and dividing the inner cavity of the hollow U-shaped pipe into two parts, the perforated partition being provided with a through hole, and the hollow U-shaped pipe being provided with liquid, the liquid being capable of passing through the through hole.

3. A floating wind turbine support structure according to claim 2, wherein, a plurality of dampers are uniformly arranged along the circumference of the upper float.

4. A floating wind turbine support structure according to claim 1, wherein, When the support platform is horizontally placed, the vertical projection of the support platform along the horizontal direction is a triangle.

5. A floating wind turbine support structure according to claim 4, wherein, The support platform comprises a plurality of crossbeams, the plurality of crossbeams being connected, and the extension directions of the plurality of crossbeams being located on the same plane.

6. A floating wind turbine support structure according to claim 4, wherein, In the projection contour, at least the distance between the three vertices of the triangle is located in a preset range, and the area is a mounting area for mounting the float unit.

7. A floating wind turbine support structure according to claim 4, wherein, The mounting position of the wind turbine is located on any side of the triangle in the projection contour.

8. A wind power generation structure, characterized by comprising: The application further relates to a floating wind turbine support structure, comprising the floating wind turbine support structure according to any one of claims 1-7, and further comprising the wind turbine.

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