Floating body device of wind turbine, wind turbine and assembly method

Abstract

This invention relates to the field of wind power technology, specifically to a floating body device for wind turbine generators, a wind turbine generator, and an assembly method therein. The floating body device for a wind turbine generator includes: a connecting structure comprising an inner and outer first connecting member and a second connecting member, with a first fixing member between the first and second connecting members, and a mounting hole on the first fixing member; a first cylinder body disposed in the mounting hole and fixed to the first fixing member; a second cylinder body with a pair of second fixing members oppositely disposed on the middle of its outer side wall, the pair of second fixing members being fixed to the first and second connecting members respectively; and a pair of sealing structures respectively disposed at both ends of the first and second cylinder bodies along the axial direction to close the openings of the first and second cylinder bodies. In the floating body device for wind turbine generators provided by this invention, the pair of second fixing members on the middle of the outer side wall of the second cylinder body are also fixed to the first and second connecting members respectively, making the force on the second cylinder body more uniform and improving the overall structural stability and service life.

Description

Technical Field

[0001] This invention relates to the field of wind power technology, specifically to a floating body device for wind turbine generators, wind turbine generators, and assembly methods. Background Technology

[0002] Floating offshore wind power is a novel wind power generation technology. Its core working principle involves efficiently converting wind energy into electricity through the rotation of wind turbine blades. Compared to traditional stationary offshore wind power, this technology offers significant advantages. The turbine body floats and is positioned at sea using buoyancy provided by a floating structure, which is then securely anchored to a designated location on the seabed via anchor chains. Its excellent structural stability and convenient transportation and mobility allow it to adapt to deeper marine environments, effectively expanding the application scope of offshore wind power and overcoming the technical bottleneck of traditional stationary offshore wind power's inability to deploy in deep waters. This provides a new technological path for the large-scale development of the offshore wind power industry. However, in recent years, the continuous growth of global energy demand has placed higher demands on the power generation capacity of floating offshore wind power. To increase the power generation of a single unit, wind turbine blades are gradually becoming longer. However, since the floating structure is always fixed to the seabed by anchor chains, under the influence of external forces such as wind, waves, and ocean currents, the floating part or even the whole may sink and be below the sea level. This phenomenon directly leads to a significant reduction in the distance between the wind turbine blades and the sea level. On the one hand, this seriously affects the safety of wind turbine operation, making it prone to safety hazards such as blade collision with the sea surface and seawater erosion of the blades. On the other hand, it also places more stringent requirements on the overall corrosion resistance of the wind turbine.

[0003] To address the safety and corrosion issues of wind turbines caused by the sinking of the floating structure, an improved solution has been proposed in the prior art. This solution involves setting up multiple independent pontoons, which are interconnected by corresponding connectors to form an integrated floating structure. A heave plate is installed at the bottom of each pontoon to dampen the vertical movement of the floating structure, thereby achieving stable support for the wind turbine and mitigating the adverse effects of sinking. However, in practical applications of this existing solution, the pontoons are typically quite tall, sometimes reaching tens of meters, while the connectors are only located at the top and bottom of the pontoons. This single-location connection method results in poor reliability of the connections between multiple pontoons. Under long-term exposure to the complex marine environment, the connectors are prone to fatigue damage and loosening, affecting the structural stability and service life of the entire floating structure and failing to meet the actual requirements for long-term stable operation of floating offshore wind power. Summary of the Invention

[0004] On the one hand, the present invention provides a floating body device for wind turbine units to solve the problems of poor structural stability and short service life of existing floating body devices, which cannot meet actual needs.

[0005] On the other hand, the present invention also provides a wind turbine to solve the problem that existing wind turbines cannot operate stably for a long period of time.

[0006] Furthermore, the present invention also provides a method for assembling wind turbine units to improve assembly efficiency while ensuring connection reliability.

[0007] On one hand, the present invention provides a floating body device for a wind turbine generator, comprising: The connecting structure includes an inner and outer first connector and a second connector, a first fixing member is provided between the first connector and the second connector, and the first fixing member is provided with mounting holes. The first cylindrical body is disposed in the mounting hole and fixed to the first fixing member; The second cylinder has a pair of second fixing members arranged opposite each other on the middle of its outer side wall. The pair of second fixing members are respectively fixed to the first connecting member and the second connecting member. A pair of sealing structures are respectively provided at both ends of the first cylinder and the second cylinder along the axial direction to seal the openings of the first cylinder and the second cylinder.

[0008] Beneficial Effects: The floating device for wind turbines provided by this invention uses hollow first and second cylinders as the main load-bearing components, allowing the entire device to float on the sea surface. Multiple first and second cylinders are connected by inner and outer first and second connecting members, ensuring a stable connection by allowing both cylinders to receive forces from the inner first connecting member and the outer second connecting member simultaneously. Furthermore, a pair of sealing structures at both ends not only close the openings of the first and second cylinders but also further strengthen the connection between them. Additionally, the second fixing member in the middle of the outer wall of the second cylinder is fixed to both the first and second connecting members, resulting in more even force distribution on the second cylinder. Even under strong winds and waves, it will not be easily damaged, improving overall structural stability and service life, thus meeting practical requirements.

[0009] In one alternative embodiment, the first fixing member includes a first fixing plate, a second fixing plate, and a fixing ring for connecting the first fixing plate and the second fixing plate, all extending toward the mounting hole. The mounting hole is formed on the fixing ring. The other end of the first fixing plate is fixed to the first connecting member, and the other end of the second fixing plate is fixed to the second connecting member.

[0010] The fixing ring is connected to the first connecting piece and the second connecting piece respectively by the first fixing plate and the second fixing plate. That is, the first cylinder is fixedly installed between the first connecting piece and the second connecting piece. The installation structure is simple and at the same time, it reduces the problem of poor load-bearing capacity when the two cylinders are connected in pairs. This allows multiple first cylinders and second cylinders to be connected to the first connecting piece and the second connecting piece with a certain load-bearing capacity at the same time, thereby improving the overall load resistance of the device.

[0011] In one alternative embodiment, the first connector, the first fixing plate, the fixing ring, the second fixing plate, and the second connector are integrally formed, and the axes of the first fixing plate and the second fixing plate coincide.

[0012] The first connector, the first fixing plate, the fixing ring, the second fixing plate, and the second connector are integrally formed, which further enhances the overall strength of the connection structure. Moreover, the axes of the first fixing plate and the second fixing plate coincide, resulting in more uniform stress distribution.

[0013] In one optional embodiment, the second fastener includes a third fastening plate extending toward and overlapping the first connector and a fourth fastening plate extending toward and overlapping the second connector. The third fastening plate and the first connector are provided with first through holes at corresponding positions, allowing fasteners to pass through. The fourth fastening plate and the second connector are provided with second through holes at corresponding positions, allowing fasteners to pass through.

[0014] The second cylinder is fixed to the first and second connecting members by the third and fourth fixing plates respectively, which are arranged opposite to each other. It can form a divergent distribution with the first cylinder, that is, the first and second cylinders are distributed as evenly as possible in the space formed by the first and second connecting members, which further improves the overall load-bearing capacity of the device; at the same time, it is fixed by fasteners after overlapping, which makes the fixation more reliable.

[0015] In one alternative embodiment, the sealing structure includes a sealing plate adapted to close the openings of the first cylinder and the second cylinder.

[0016] The above structure ensures good sealing of the first and second cylinders while being simple in structure and low in cost.

[0017] In one alternative embodiment, the sealing structure further includes a third fastener extending away from the center of the sealing structure, and a fourth fastener is provided on the outer side wall of the first cylinder and the second cylinder near their ends. Fasteners pass through the third fastener and the fourth fastener in sequence to fix the sealing structure to the first cylinder and the second cylinder.

[0018] The third and fourth fasteners are connected by fasteners, which further improves the reliability of the connection between the sealing structure and the first and second cylinders.

[0019] In one alternative embodiment, the third fastener includes an annular plate sleeved around the outer periphery of the first and second cylinders and a fifth fastener plate perpendicular to the annular plate. The fifth fastener plate and the fourth fastener are provided with a third through hole that allows fasteners to pass through.

[0020] The ring plate is sleeved on the outer periphery of the first cylinder and the second cylinder, providing a certain degree of fixed support for the first cylinder and the second cylinder, thus increasing the overall strength of the device.

[0021] In one optional embodiment, both the first connector and the second connector are circular rings, and four first fixing members are arranged in a cross shape between the first connector and the second connector, with the second cylinder disposed between two adjacent first fixing members.

[0022] The annular first and second connectors are easier to install with the first and second cylinders, and form a three-layered ring from the inside out, resulting in higher structural stability. The four first fixing members, arranged in a cross shape, together with the first and second connectors, form the structural foundation of the entire floating device, providing a reference for the subsequent installation of the second cylinder, and the overall distribution is uniform, resulting in more balanced stress.

[0023] On the other hand, a wind turbine is also provided, including a buoyancy device for the wind turbine and a wind power component disposed on the buoyancy device of the wind turbine.

[0024] Beneficial effects: The wind turbine provided by this invention has an overall floating device that floats on the sea surface, thereby increasing the distance between the turbine blades and the sea surface, reducing the probability of the blades being corroded by seawater, and achieving long-term stable operation of the offshore wind turbine.

[0025] Furthermore, a method for assembling a wind turbine generator set is also provided, including the following steps: The first cylinder is placed in the mounting hole of the connecting structure and fixed to the first fastener; The pair of second fixing members of the second cylinder are respectively fixed to the first connecting member and the second connecting member of the connecting structure; A pair of sealing structures are fixed to the two ends of the first cylinder and the second cylinder along the axial direction, respectively, to seal the openings of the first cylinder and the second cylinder; Fix the tower of the wind turbine assembly to the upper sealing structure; Install and fix the rotor assembly of the wind turbine to the tower.

[0026] Beneficial effects: The wind turbine assembly method provided by the present invention involves sequentially installing and fixing the first cylinder and the second cylinder to the connecting structure, and then fixing the sealing structure to the ends of the first cylinder and the second cylinder. The assembly method is simple and the installation is firm. Then, the tower and impeller of the wind turbine assembly are fixed sequentially, resulting in high installation efficiency. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional schematic diagram of the floating body device of the wind turbine unit according to an embodiment of the present invention; Figure 2 This is a top view of the floating body device of the wind turbine generator according to an embodiment of the present invention; Figure 3 This is a top view of the floating body device of the wind turbine generator in an embodiment of the present invention without the sealing structure installed; Figure 4 for Figure 3 Side view; Figure 5 This is a schematic diagram of the connection structure; Figure 6 This is a schematic diagram of the second cylinder; Figure 7 This is a top view of the second cylinder; Figure 8 This is a schematic diagram of a wind turbine generator according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures: 1. Connecting structure; 101. First connecting piece; 102. Second connecting piece; 103. First fixing piece; 1031. First fixing plate; 1032. Second fixing plate; 1033. Fixing ring; 2. First cylinder; 3. Second cylinder; 301. Second fixing piece; 3011. Third fixing plate; 3012. Fourth fixing plate; 3013. First through hole; 3014. Second through hole; 302. Fourth fixing piece; 4. Sealing structure; 401. Third fixing piece; 4011. Ring plate; 4012. Fifth fixing plate; 402. Sealing plate; 403. Vertical rectangular steel plate; 5. Fasteners; 6. Tower; 7. Impeller assembly; 701. Hub; 702. Blade; 8. Nacelle. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The following is combined with Figures 1 to 8 Embodiments of the present invention are described.

[0032] According to an embodiment of the present invention, in one aspect, a buoyancy device for a wind turbine generator is provided, comprising: The connecting structure 1 includes an inner and outer first connector 101 and a second connector 102, with a first fixing member 103 provided between the first connector 101 and the second connector 102, and a mounting hole provided on the first fixing member 103. The first cylindrical body 2 is disposed in the mounting hole and fixed to the first fixing member 103; The second cylinder 3 has a pair of second fixing members 301 arranged opposite each other on the middle of its outer side wall. The pair of second fixing members 301 are respectively fixed to the first connecting member 101 and the second connecting member 102. A pair of sealing structures 4 are respectively provided at both ends of the first cylinder 2 and the second cylinder 3 along the axial direction to seal the openings of the first cylinder 2 and the second cylinder 3.

[0033] like Figures 1 to 7 As shown, the first connector 101 and the second connector 102 are concentric frame structures, which can be circular, triangular, square, rectangular, pentagonal, etc., without specific limitations. Since both the first connector 101 and the second connector 102 are hollow frame structures, a first fixing member 103 is provided to connect them into a whole. The number of first fixing members 103 is at least two, and they are symmetrically arranged to ensure basic support stability. Of course, there can also be three first fixing members 103. The strength is higher when the first fixing members 103 are distributed in a triangle. There can also be four, five or more first fixing members 103, which are evenly distributed in the space between the first connector 101 and the second connector 102. There is no specific limitation on their number. The mounting hole is used to install and fix the first cylinder 2. Therefore, the inner diameter of the mounting hole is set to be consistent with the outer diameter of the first cylinder 2 so that the first cylinder 2 is just held in the mounting hole. To further improve the reliability of the installation, the first cylinder 2 and the mounting hole can be fixed by welding. For ease of processing, the first cylinder 2 and the second cylinder 3 are identical in specifications, i.e., their inner diameter, outer diameter, and length are all the same. In this embodiment, hollow steel round tubes are preferably used to make the first cylinder 2 and the second cylinder 3, and an anti-corrosion coating is applied to the outer surface of the steel round tubes. Figure 6and Figure 7 As shown, a second fixing member 301 is provided in the middle of the outer side wall of the second cylinder 3. The sum of the outer diameters of the second fixing member 301 and the second cylinder 3 is greater than the distance between the first connecting member 101 and the second connecting member 102, so as to fix the second cylinder 3 to the first connecting member 101 and the second connecting member 102. In this embodiment, the second fixing member 301 is fixed by welding a steel plate to the second cylinder 3. Since the first cylinder 2 is directly inserted into the mounting hole for fixation, there is no need to set the second fixing member 301 on the first cylinder 2. Since both the first cylinder 2 and the second cylinder 3 are made of steel round tubes and both ends are open, a pair of sealing structures 4 are provided in this embodiment, which are set at both ends of the first cylinder 2 and the second cylinder 3 to close the openings and prevent seawater from entering the interior of the first cylinder 2 and the second cylinder 3, affecting the floating performance of the buoy device. In addition, the surfaces of the connecting structure 1, the second fixing member 301 and the pair of sealing structures 4 need to be coated with an anti-corrosion coating to prevent corrosion caused by long-term immersion in seawater and extend their service life.

[0034] Beneficial Effects: The floating device for wind turbines provided by this invention uses hollow first cylinders 2 and second cylinders 3 as the main load-bearing parts, allowing the entire floating device to float on the sea surface. Multiple first cylinders 2 and second cylinders 3 are connected by inner and outer connecting members 101 and 102, ensuring that the first cylinders 2 and 3 are simultaneously subjected to forces from both the inner connecting member 101 and the outer connecting member 102, resulting in a more stable connection. Furthermore, a pair of sealing structures 4 at both ends not only seal the openings of the first cylinders 2 and 3 but also further strengthen the connection between them. Additionally, the second fixing member 301 in the middle of the outer wall of the second cylinder 3 is fixed to the first connecting member 101 and the second connecting member 102, making the force on the second cylinder 3 more even. Even under strong winds and waves, it will not be easily damaged, improving the overall structural stability and service life, and meeting practical requirements.

[0035] In one embodiment, the first fixing member 103 includes a first fixing plate 1031, a second fixing plate 1032, and a fixing ring 1033 for connecting the first fixing plate 1031 and the second fixing plate 1032, which extend toward the mounting hole. The mounting hole is formed on the fixing ring 1033. The other end of the first fixing plate 1031 is fixed to the first connecting member 101, and the other end of the second fixing plate 1032 is fixed to the second connecting member 102.

[0036] like Figure 5As shown, the first fixing plate 1031 and the second fixing plate 1032 are arranged opposite each other on both sides of the fixing ring 1033. Both are nearly rectangular plates, and the width of the first fixing plate 1031 is smaller than the length of the second fixing plate 1032. This is because the perimeter of the first connecting member 101 is smaller than the perimeter of the second connecting member 102. To avoid the first fixing plates 1031 of two adjacent first fixing members 103 overlapping, the first fixing plate 1031 with the smaller width is used to connect with the first connecting member 101, which saves materials and reduces the weight of the device. Of course, the first fixing plate 1031 and the second fixing plate 1032 can also be staggered, and the width can also be the same. No specific limitation is made here. The mounting hole is formed on the fixing ring 1033, and the inner diameter is consistent with the outer diameter of the first cylinder 2, so that the first cylinder 2 is just fixed in the mounting hole of the fixing ring 1033.

[0037] The fixing ring 1033 is connected to the first connecting member 101 and the second connecting member 102 respectively by the first fixing plate 1031 and the second fixing plate 1032, that is, the first cylinder 2 is fixedly installed between the first connecting member 101 and the second connecting member 102. The installation structure is simple, and at the same time, it reduces the problem of poor load-bearing capacity when the two cylinders are connected in pairs. This allows multiple first cylinders 2 and second cylinders 3 to be connected to the first connecting member 101 and the second connecting member 102 with a certain load-bearing capacity at the same time, thereby improving the overall load-bearing capacity of the device.

[0038] In one embodiment, the first connector 101, the first fixing plate 1031, the fixing ring 1033, the second fixing plate 1032, and the second connector 102 are integrally formed, and the axes of the first fixing plate 1031 and the second fixing plate 1032 coincide.

[0039] The first connector 101, the first fixing plate 1031, the fixing ring 1033, the second fixing plate 1032, and the second connector 102 can be integrally formed by cutting, or they can be processed separately and then fixed by welding. However, the connection strength will vary depending on the welding operation.

[0040] The first connector 101, the first fixing plate 1031, the fixing ring 1033, the second fixing plate 1032, and the second connector 102 are integrally formed, which further enhances the overall strength of the connection structure 1. Moreover, the axes of the first fixing plate 1031 and the second fixing plate 1032 coincide, resulting in more uniform force distribution.

[0041] In one embodiment, the second fastener 301 includes a third fastening plate 3011 extending toward and overlapping the first connector 101 and a fourth fastening plate 3012 extending toward and overlapping the second connector 102. The third fastening plate 3011 and the first connector 101 are respectively provided with a first through hole 3013 allowing fasteners to pass through, and the fourth fastening plate 3012 and the second connector 102 are respectively provided with a second through hole 3014 allowing fasteners to pass through.

[0042] like Figure 3 and Figure 6 As shown, the third fixing plate 3011 and the fourth fixing plate 3012 are arranged opposite each other on both sides of the second cylinder 3, and their axes coincide. Both are nearly rectangular plates, and the width of the third fixing plate 3011 is smaller than the width of the fourth fixing plate 3012. In this embodiment, the first through holes 3013 on the third fixing plate 3011 are spaced apart along the length direction of the third fixing plate 3011, and the second through holes 3014 on the fourth fixing plate 3012 are spaced apart along the width direction of the fourth fixing plate 3012. This is because the perimeter of the first connecting member 101 is smaller than that of the second connecting member 102. When connecting the same number of second fixing members 301, the space is limited. In order to avoid the third fixing plate 3011 from being stacked on the first connecting member 101 as much as possible, the first through holes 3013 are spaced apart along the length direction of the third fixing plate 3011. On the other hand, the space on the second connecting member 102 is relatively spacious, so the second through holes 3014 are spaced apart along the width direction of the fourth fixing plate 3012.

[0043] The second cylinder 3 is fixed to the first connector 101 and the second connector 102 respectively by the third fixing plate 3011 and the fourth fixing plate 3012 arranged opposite to each other. It can form a divergent distribution with the first cylinder 2, that is, the first cylinder 2 and the second cylinder 3 are distributed as evenly as possible in the space formed by the first connector 101 and the second connector 102, which further improves the overall load-bearing capacity of the device; at the same time, after overlapping, it is fixed by fasteners 5, which makes the fixation more reliable.

[0044] In one embodiment, the sealing structure 4 includes a sealing plate 402, which is adapted to close the openings of the first cylinder 2 and the second cylinder 3.

[0045] like Figure 2 As shown, the sealing plate 402 is a circular plate, and its size is preferably such that it completely covers the openings of the first cylinder 2 and the second cylinder 3. In this embodiment, the diameter of the sealing plate 402 is equal to the inner diameter of the second connector 102. The sealing structure 4 is installed over the openings of the first cylinder 2 and the second cylinder 3 by hoisting. To ensure sealing, the sealing plate 402 can be fixed to the openings of the first cylinder 2 and the second cylinder 3 by welding.

[0046] The above structure ensures good sealing of the first cylinder 2 and the second cylinder 3 while being simple in structure and low in cost.

[0047] As an alternative implementation, a downwardly extending fastening part can be provided at the position of the sealing plate 402 corresponding to the first cylinder 2 and the second cylinder 3. The inner diameter of the fastening part is consistent with the outer diameter of the first cylinder 2 and the second cylinder 3, which further improves the reliability of the connection.

[0048] In one embodiment, the sealing structure 4 further includes a third fixing member 401 extending away from the center of the sealing structure 4, and a fourth fixing member 302 is provided on the outer side wall of the first cylinder 2 and the second cylinder 3 near the end. The fastener 5 passes through the third fixing member 401 and the fourth fixing member 302 in sequence to fix the sealing structure 4 to the first cylinder 2 and the second cylinder 3.

[0049] like Figure 1 As shown, the outer edge of the sealing plate 402 extends a certain distance away from the center of the sealing structure 4 to form a third fixing member 401, and the ends of the first cylinder 2 and the second cylinder 3 extend a certain distance away from the axis of the first cylinder 2 and the second cylinder 3 to form a fourth fixing member 302. The third fixing member 401 and the fourth fixing member 302 are correspondingly arranged, and a third through hole is provided to allow the fastener 5 to pass through, so as to further fix the sealing structure 4 to the first cylinder 2 and the second cylinder 3.

[0050] The third fastener 401 and the fourth fastener 302 are connected by fastener 5, which further improves the reliability of the connection between the sealing structure 4 and the first cylinder 2 and the second cylinder 3.

[0051] In one embodiment, the third fastener 401 includes an annular plate 4011 sleeved around the outer periphery of the first cylinder 2 and the second cylinder 3, and a fifth fastener 4012 disposed perpendicularly to the annular plate 4011. The fifth fastener 4012 and the fourth fastener 302 are provided with a third through hole that allows the fastener 5 to pass through.

[0052] like Figure 1 As shown, the ring plate 4011 and the fifth fixing plate 4012 are stepped and integrally formed. The ring plate 4011 fits against the outer wall of the first cylinder 2 and the second cylinder 3 to enclose them. The fifth fixing plate 4012 and the fourth fixing member 302 extend to the same length away from the axis of the floating device to ensure complete fit. The fourth fixing member 302 can also be a ring plate or multiple flat plates spaced at intervals to ensure uniform force distribution.

[0053] The ring plate 4011 is sleeved on the outer periphery of the first cylinder 2 and the second cylinder 3, which plays a certain role in fixing and supporting the first cylinder 2 and the second cylinder 3, making the overall strength of the device higher.

[0054] In one embodiment, the first connector 101 and the second connector 102 are both rings, and four first fixing members 103 are arranged in a cross shape between the first connector 101 and the second connector 102. The second cylinder 3 is arranged between two adjacent first fixing members 103.

[0055] like Figure 5 As shown, the first connecting member 101 and the second connecting member 102 are set as annular rings with the same shape as the first cylinder 2 and the second cylinder 3. In this way, when multiple first cylinders 2 and second cylinders 3 are installed, the empty space is smaller. Under the premise of unchanged space, the whole device is more compact and thus has better stability. The included angle between two adjacent first fixing members 103 is 90 degrees, thus forming a cross-shaped distribution, and the force is evenly distributed.

[0056] The annular first connector 101 and second connector 102 are easier to install with the first cylinder 2 and the second cylinder 3, and form a three-layered ring from the inside out, resulting in higher structural stability. The four first fixing members 103, arranged in a cross shape, together with the first connector 101 and the second connector 102, form the structural foundation of the entire floating device, providing a reference for the subsequent installation of the second cylinder 3, and the overall distribution is uniform, resulting in more balanced force distribution.

[0057] On the other hand, a wind turbine is also provided, including a buoyancy device for the wind turbine and a wind power component disposed on the buoyancy device of the wind turbine.

[0058] like Figure 8 As shown, the wind power assembly includes a tower 6 for connection to the floating body device of the wind turbine and an impeller device 7 located above the tower 6. In this embodiment, the tower 6 is a steel tower. To facilitate the installation of the tower 6, multiple evenly distributed vertical rectangular steel plates 403 are welded to the upper surface of the sealing structure 4 at the top. The number of vertical rectangular steel plates 403 is set according to different wind turbine capacities, and bolt holes are evenly distributed on the vertical rectangular steel plates 403. Vertical steel plates are also evenly distributed on the sides of the bottom of the tower 6, and holes are reserved on the vertical steel plates. When the tower 6 is hoisted onto the floating body device, the vertical steel plates of the tower 6 are aligned one by one with the vertical rectangular steel plates 403 on the sealing structure 4. Bolts are then passed through the holes on the bottom vertical steel plates of the tower 6 and the bolt holes on the vertical rectangular steel plates 403 of the sealing structure 4 in sequence to fix them. Then, a nacelle 8 is installed on the top of the tower 6. The nacelle 8 is equipped with an impeller device 7, which includes a hub 701 connected to the nacelle 8 and blades 702 on the hub 701.

[0059] Beneficial effects: The wind turbine provided by this invention increases the distance between the turbine blades 702 and the sea surface because the floating body device floats on the sea surface, thereby reducing the probability of the blades 702 being corroded by seawater and realizing the long-term stable operation of the offshore wind turbine.

[0060] Furthermore, a method for assembling a wind turbine generator set is also provided, including the following steps: The first cylinder 2 is placed in the mounting hole of the connecting structure 1 and fixed to the first fixing member 103; The pair of second fixing members 301 of the second cylinder 3 are respectively fixed to the first connecting member 101 and the second connecting member 102 of the connecting structure 1; A pair of sealing structures 4 are fixed to the two ends of the first cylinder 2 and the second cylinder 3 along the axial direction, respectively, to seal the openings of the first cylinder 2 and the second cylinder 3; The tower 6 of the wind turbine assembly is fixed to the upper sealing structure 4; Install and fix the rotor assembly 7 of the wind turbine component to the tower 6.

[0061] The specific assembly method in this embodiment is as follows: First, the hollow steel tube is cut to form a first cylinder 2 and a second cylinder 3, neither of which is closed at the top or bottom. Simultaneously, a third fixing plate 3011 and a fourth fixing plate 3012 of different widths are installed opposite each other in the middle of the second cylinder 3. Horizontal plates are installed at the ends of the first cylinder 2 and the second cylinder 3. The specific dimensions of the first cylinder 2 and the second cylinder 3 can be adjusted by the manufacturer or design unit according to the required buoyancy.

[0062] Then, the connecting structure 1 is processed, and the four first cylinders 2 are respectively installed in the four mounting holes of the connecting structure 1 and welded to fix them.

[0063] Then, insert the second cylinder 3 from bottom to top or from top between two adjacent first fixing members 103, and fix a pair of second fixing members 301 of the second cylinder 3 to the first connecting member 101 and the second connecting member 102 of the connecting structure 1 respectively.

[0064] Next, a pair of sealing structures 4 are welded to the two ends of the first cylinder 2 and the second cylinder 3 along the axial direction. At the same time, the fifth fixing plate 4012 of the sealing structure 4 is aligned with the fourth fixing member 302 at the end of the first cylinder 2 and the second cylinder 3, and then tightened with bolts to achieve the sealing of the top and bottom of the first cylinder 2 and the second cylinder 3.

[0065] Then, the tower 6 of the wind turbine component is aligned with the vertical rectangular steel plate 403 on the sealing structure 4 at the top of the first cylinder 2 and the second cylinder 3 through the vertical steel plate set on the bottom side around the perimeter, and then fixed with bolts.

[0066] Finally, the nacelle 8, rotor assembly 7, and tower 6 of the wind turbine components are installed and fixed.

[0067] Beneficial effects: The wind turbine assembly method provided by the present invention involves firstly installing and fixing the first cylinder 2 and the second cylinder 3 to the connecting structure 1 in sequence, and then fixing the sealing structure 4 to the ends of the first cylinder 2 and the second cylinder 3. The assembly method is simple and the installation is firm. Then, the tower 6 and the impeller device 7 of the wind turbine assembly are fixed in sequence, resulting in high installation efficiency.

[0068] This embodiment selects an appropriate steel tube float assembly height based on different requirements for the height and capacity of offshore wind turbines, solving the problem of increased float structure cross-section and workload caused by increased wind turbine height. The float and other steel components are of moderate size, easy to transport, and simpler to construct than conventional float foundation structures, effectively improving construction efficiency and quality. It is cost-effective, provides sufficient load-bearing capacity, and is relatively convenient and quick in terms of manufacturing process, material transportation, and construction. Only on-site bolting and welding connections of multiple steel tubes and upper and lower enclosed structures are required.

[0069] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A floating body device for a wind turbine generator, characterized in that, include: The connecting structure (1) includes a first connecting member (101) and a second connecting member (102) with inner and outer sleeves. A first fixing member (103) is provided between the first connecting member (101) and the second connecting member (102). The first fixing member (103) is provided with mounting holes. The first cylindrical body (2) is disposed in the mounting hole and fixed to the first fixing member (103); The second cylinder (3) has a pair of second fixing members (301) arranged opposite each other on the middle of its outer side wall. The pair of second fixing members (301) are respectively fixed to the first connecting member (101) and the second connecting member (102); A pair of sealing structures (4) are respectively provided at both ends of the first cylinder (2) and the second cylinder (3) along the axial direction to close the openings of the first cylinder (2) and the second cylinder (3).

2. The floating body device for a wind turbine generator according to claim 1, characterized in that, The first fixing member (103) includes a first fixing plate (1031), a second fixing plate (1032) extending toward the mounting hole, and a fixing ring (1033) for connecting the first fixing plate (1031) and the second fixing plate (1032). The mounting hole is formed on the fixing ring (1033). The other end of the first fixing plate (1031) is fixed to the first connecting member (101), and the other end of the second fixing plate (1032) is fixed to the second connecting member (102).

3. The floating body device for a wind turbine generator according to claim 2, characterized in that, The first connector (101), the first fixing plate (1031), the fixing ring (1033), the second fixing plate (1032) and the second connector (102) are integrally formed, and the axes of the first fixing plate (1031) and the second fixing plate (1032) coincide.

4. The floating body device for a wind turbine generator according to claim 1, characterized in that, The second fixing member (301) includes a third fixing plate (3011) extending toward the first connecting member (101) and overlapping the first connecting member (101) and a fourth fixing plate (3012) extending toward the second connecting member (102) and overlapping the second connecting member (102). The third fixing plate (3011) and the first connecting member (101) are provided with a first through hole (3013) at corresponding positions, allowing the fastener (5) to pass through. The fourth fixing plate (3012) and the second connecting member (102) are provided with a second through hole (3014) at corresponding positions, allowing the fastener (5) to pass through.

5. The floating body device for a wind turbine generator according to claim 1, characterized in that, The sealing structure (4) includes a sealing plate (402) adapted to close the openings of the first cylinder (2) and the second cylinder (3).

6. The buoyancy device for a wind turbine generator according to claim 5, characterized in that, The sealing structure (4) further includes a third fastener (401) extending away from the center of the sealing structure (4). The outer side walls of the first cylinder (2) and the second cylinder (3) are provided with a fourth fastener (302) near the end. The fastener (5) passes through the third fastener (401) and the fourth fastener (302) in sequence to fix the sealing structure (4) to the first cylinder (2) and the second cylinder (3).

7. The buoyancy device for a wind turbine generator according to claim 6, characterized in that, The third fixing member (401) includes an annular plate (4011) sleeved on the outer periphery of the first cylinder (2) and the second cylinder (3) and a fifth fixing plate (4012) arranged perpendicularly to the annular plate (4011). The fifth fixing plate (4012) and the fourth fixing member (302) are provided with a third through hole that allows the fastener (5) to pass through.

8. The buoyancy device for a wind turbine generator according to any one of claims 1 to 7, characterized in that, The first connector (101) and the second connector (102) are both rings. The four first fixing parts (103) are arranged in a cross shape between the first connector (101) and the second connector (102). The second cylinder (3) is arranged between two adjacent first fixing parts (103).

9. A wind turbine generator set, characterized in that, The device includes the floating body assembly of the wind turbine as described in any one of claims 1 to 8, and further includes a wind power component, the wind power component being disposed on the floating body assembly of the wind turbine.

10. A method for assembling a wind turbine generator set, characterized in that, Includes the following steps: The first cylinder (2) is placed in the mounting hole of the connecting structure (1) and fixed to the first fixing member (103); The pair of second fixing members (301) of the second cylinder (3) are fixed to the first connecting member (101) and the second connecting member (102) of the connecting structure (1), respectively; A pair of sealing structures (4) are fixed to the two ends of the first cylinder (2) and the second cylinder (3) along the axial direction to close the openings of the first cylinder (2) and the second cylinder (3); Fix the tower of the wind turbine assembly to the upper sealing structure (4); Install and fix the rotor assembly of the wind turbine to the tower.

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