A jacket and offshore wind structure

Abstract

This invention relates to the field of offshore wind power technology and discloses a jacket structure and an offshore wind power structure. The jacket structure of this invention includes: a frame and a damping vibration reduction device; the damping vibration reduction device includes: a shell, a damper, a displacement amplification component, and a connecting component. The shell is hinged to the top of the frame, the damper and the displacement amplification component are disposed within the shell, and the damper is connected to the power output end of the displacement amplification component. The connecting component includes multiple connecting cables, one end of which is connected to the power input end of the displacement amplification component, and the other end of which extends outside the shell and connects to the frame. Adjacent connecting cables are arranged at an angle. This damping vibration reduction device in the jacket structure can amplify displacement, allowing the damper to fully exert its vibration reduction effect. It can also achieve vibration reduction in multiple directions, resulting in good vibration reduction performance and meeting the requirements for use in complex current load environments in the ocean.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power technology, specifically to a jacket structure and an offshore wind power structure. Background Technology

[0002] As one of the most abundant renewable energy sources, wind energy resource development has become a key focus of renewable energy development in recent years. Compared to onshore wind energy resources, my country's offshore wind energy resources are even more abundant. Statistics show that the total wind energy reserves within 50 meters of the shore in my country are 883 million kilowatts, with a technically exploitable capacity of 570 million kilowatts. Compared to onshore wind power, offshore wind power development has advantages such as saving land resources, higher wind speeds, and proximity to power load centers, making it an important direction for the development of my country's wind energy industry. With the continuous improvement of nearshore wind energy resource development, offshore wind energy resources are gradually shifting from near-shallow waters to transitional water depths (30-60 meters). In transitional water depths, monopile offshore wind turbine support structures are no longer suitable due to structural instability and rapidly increasing costs. Jacket offshore wind turbine support structures, with their advantages of convenient installation and reasonable economic costs in transitional water depths, are gradually becoming the best choice for offshore wind power development in transitional water depths.

[0003] As water depth increases and the structural dimensions of offshore wind turbines continue to grow, the wave and current loads acting on the jacket structure increase significantly, leading to increased vibration. Furthermore, the wide frequency range of marine environmental loads can also cause resonance responses in the jacket structure. The vibration response of the jacket affects its support stability. Current methods to reduce jacket vibration response include: increasing the structural stiffness of the jacket, but this increases production costs and reduces economic benefits; and adding dampers (such as tuned mass dampers) at locations with significant deformation, such as the top and middle of the wind turbine tower. However, dampers are difficult to fully reduce vibration when deformation is small, and most dampers can only reduce vibration in a single degree of freedom, failing to meet the requirements of complex marine current load environments, resulting in poor vibration reduction performance. Summary of the Invention

[0004] In view of this, the present invention provides a jacket and offshore wind power structure to solve the problems that existing dampers are difficult to play a sufficient vibration reduction role when the jacket vibration deformation is small, and can only reduce vibration in a single degree of freedom direction, which cannot meet the requirements of the complex ocean current load environment and has poor vibration reduction effect.

[0005] In a first aspect, the present invention provides a catheter holder, comprising:

[0006] Frame;

[0007] A damping vibration reduction device includes: a housing, a damper, a displacement amplification component, and a connecting component. The housing is hinged to the top of the frame. The damper and the displacement amplification component are disposed inside the housing, and the damper is connected to the power output end of the displacement amplification component. The connecting component includes multiple connecting cables. One end of each connecting cable is connected to the power input end of the displacement amplification component, and the other end of each connecting cable extends out of the housing and is connected to the frame. Adjacent connecting cables are arranged at an angle.

[0008] Beneficial effects

[0009] When a jacket is subjected to wave and other current loads, it will vibrate. The vibration of the jacket structure will cause the connecting cables to move, applying a force to the displacement amplification component. The displacement amplification component amplifies the smaller displacements during the jacket vibration and then transmits them to the damper for buffering and vibration reduction. This damping and vibration reduction device can amplify displacements, allowing the damper to fully exert its vibration reduction effect. Furthermore, the connecting cables extend from different directions of the shell to the jacket structure, enabling vibration reduction in multiple degrees of freedom, resulting in good vibration reduction performance and meeting the requirements for use in complex current load environments in the ocean.

[0010] In an alternative embodiment, the housing is hinged to the top of the frame via a ball bearing.

[0011] Beneficial effects

[0012] After the shell is hinged to the ball support, the damping and vibration reduction device rotates in the corresponding direction when the frame vibrates, thereby achieving vibration reduction in multiple degrees of freedom.

[0013] In an optional embodiment, the displacement amplification assembly includes: a first gear, a second gear, and a rack, wherein the first gear and the second gear are coaxially connected, the first gear is connected to the connecting cable, the second gear meshes with the rack, the rack is connected to the damper, and the diameter of the first gear is smaller than the diameter of the second gear.

[0014] Beneficial effects

[0015] When the frame vibrates, it will drive the connecting cable to move. The movement of the connecting cable will drive the first gear to rotate. Since the first gear is a small gear and the second gear is a large gear, the displacement can be amplified, causing the damper to undergo greater deformation. This will allow the damper to better perform its vibration reduction function.

[0016] In an optional embodiment, the rack is arranged along the length direction of the housing, and the axial directions of the first gear and the second gear are arranged along the height direction of the housing.

[0017] In an optional embodiment, the connecting assembly includes four connecting cables, with an included angle of 90° between any two adjacent connecting cables.

[0018] In an optional embodiment, the connecting cable is a chain.

[0019] Beneficial effects

[0020] The connecting cable is preferably a chain, which can better mesh with the first gear and drive the first gear to rotate.

[0021] In an optional embodiment, a vibration damping support is also provided on the top of the frame.

[0022] Beneficial effects

[0023] When a strong earthquake or other earthquake strikes, vibration damping bearings can effectively reduce vertical vibrations.

[0024] In an optional embodiment, the frame includes: support piles, connecting columns, and diagonal braces. The four support piles are symmetrically arranged in pairs on the seabed, and each support pile is provided with a connecting column. Diagonal braces are provided between two adjacent connecting columns.

[0025] In an optional embodiment, the diameter of the connecting post increases from top to bottom.

[0026] Secondly, the present invention also provides an offshore wind power structure, comprising: the aforementioned jacket frame, adapter seat, and wind turbine tower, wherein the adapter seat is disposed on the frame body, and the wind turbine tower is disposed on the adapter seat.

[0027] Beneficial effects

[0028] Since offshore wind turbine structures include jackets and have the same effect as jackets, they will not be elaborated on here. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the offshore wind power structure of the present invention;

[0031] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0032] Figure 3This is a top view of the damping and vibration reduction device in the offshore wind power structure of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Frame structure; 11. Support piles; 12. Connecting columns; 13. Diagonal braces;

[0035] 2. Damping and vibration reduction device; 21. Housing; 22. Damper; 23. Displacement amplification component; 231. First gear; 232. Second gear; 233. Rack; 24. Connecting cable; 25. Connecting rod.

[0036] 3. Spherical support;

[0037] 4. Vibration damping bearings;

[0038] 5. Adapter socket;

[0039] 6. Wind turbine tower. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.

[0045] According to an embodiment of the present invention, in one aspect, a jacket support is provided, comprising: a frame body 1 and a damping and vibration reduction device 2. The damping and vibration reduction device 2 comprises: a housing 21, a damper 22, a displacement amplification component 23, and a connecting assembly. The housing 21 is hinged to the top of the frame body 1, the damper 22 and the displacement amplification component 23 are disposed within the housing 21, and the damper 22 is connected to the power output end of the displacement amplification component 23. The connecting assembly comprises multiple connecting cables 24, one end of each connecting cable 24 is connected to the power input end of the displacement amplification component 23, and the other end of each connecting cable 24 extends out of the housing 21 and is connected to the frame body 1, with adjacent connecting cables 24 arranged at an included angle.

[0046] The jacket structure serves as the supporting foundation for offshore wind turbines, with frame 1 being the main steel structure support. Frame 1, situated in the sea, is subject to wave and other current loads, resulting in vibration. Under normal operating conditions, the vibration of frame 1 is primarily horizontal, but this vibration is not unidirectional and can occur in any direction within the horizontal plane. The hinged connection between the shell 21 and frame 1 is equivalent to the hinged connection between the entire damping and vibration reduction device 2 and frame 1. When frame 1 vibrates, the damping and vibration reduction device 2 rotates accordingly. At this time, one end of the connecting cable 24, which is fixedly connected to frame 1, is restricted, while the other end applies a force to the power input end of the displacement amplification component 23. The displacement amplification component 23 amplifies the small deformation generated during frame 1 vibration. Then, the power output end of the displacement amplification component 23 applies a force to the damper 22, causing the damper 22 to deform and reduce vibration. The deformation of the damper 22, amplified by the displacement amplification component 23, is larger than the deformation of frame 1 during vibration.

[0047] The jacket structure utilizes a damping vibration reduction device 2 to mitigate vibrations in the frame 1, thus improving its stability. Since the deformation of the frame 1 during vibration is relatively small, directly transmitting it to the damper 22 would affect its vibration reduction effect. Therefore, the displacement amplification component 23 within the damping vibration reduction device 2 amplifies the displacement, increasing the small deformation of the frame 1 before transmitting it to the damper 22. This allows the damper 22 to have a larger deformation, thereby maximizing its vibration reduction effect. The wave and current loads act in any direction around the sea level. Since the shell 21 is hinged to the frame 1, the shell 21 can rotate with the frame 1 when it vibrates in any direction. Multiple connecting cables 24 extend from the shell 21 in different directions and connect to the frame 1. When the shell 21 rotates in any direction, the corresponding connecting cables 24 apply force to the displacement amplification component 23, achieving multi-directional vibration reduction. This meets the requirements of the jacket structure under complex and diverse wave and current loads in marine environments, demonstrating excellent vibration reduction performance.

[0048] Furthermore, the housing 21 of the damping vibration reduction device 2 has an installation cavity inside, which provides installation space for the damper 22, displacement amplification component 23 and connecting components. At the same time, it can also prevent seawater from splashing onto the damper 22 and displacement amplification component 23, causing corrosion of the components in the damper 22 and displacement amplification component 23, thereby causing the damping vibration reduction device 2 to malfunction.

[0049] The damper 22 is preferably a viscous damper 22, which is made based on the principle that fluid will generate throttling resistance when it passes through a throttling orifice in the fluid motion principle. It is a damper 22 that is related to the piston movement speed. The reciprocating motion of the piston drives the flow of the internal damping medium, thereby producing a damping effect and converting kinetic energy into heat energy for dissipation.

[0050] In one embodiment, the displacement amplification assembly 23 includes a first gear 231, a second gear 232, and a rack 233. The first gear 231 and the second gear 232 are coaxially connected. The first gear 231 is connected to the connecting cable 24. The second gear 232 meshes with the rack 233. The rack 233 is connected to the damper 22. The diameter of the first gear 231 is smaller than the diameter of the second gear 232.

[0051] The first gear 231 is the power input end of the displacement amplification component 23. When the frame 1 vibrates, causing the connecting cable 24 to change position, the connecting cable 24 will drive the first gear 231 to rotate. The first gear 231 and the second gear 232 are coaxially connected, meaning they rotate synchronously. However, since the first gear 231 is a small gear and the second gear 232 is a large gear, the second gear 232 can amplify the displacement input to the first gear 231. The rack 233 is the power output end of the displacement amplification component 23. The rack 233 is connected to the damper 22 through the connecting rod 25. When the second gear 232 rotates, it drives the rack 233 to translate. The translation of the rack 233 in turn causes the damper 22 to deform, consuming vibration energy and reducing vibration.

[0052] The displacement amplification component 23 can transform the small deformation of the frame 1 during vibration into the larger deformation of the damper 22, so as to fully utilize the vibration reduction performance of the damper 22. At the same time, it can convert the rotational motion of the connecting cables 24 in various directions applied to the first gear 231 into the translational motion of the rack 233, causing the damper 22 to deform and achieve vibration reduction.

[0053] In one embodiment, the rack 233 is arranged along the length direction of the housing 21, and the axial directions of the first gear 231 and the second gear 232 are arranged along the height direction of the housing 21.

[0054] like Figure 3As shown, the housing 21 is rectangular, and the rack 233 in the displacement amplification assembly 23 is arranged along the length direction of the housing 21, that is, the movement direction of the rack 233 is along the length direction of the housing 21. The corresponding damper 22 is disposed on the left or right inner wall of the housing 21. In this embodiment, the damper 22 is disposed on the left inner wall of the housing 21, and the left end of the rack 233 is connected to the damper 22 via a connecting rod 25. One side of the rack 233 has a toothed structure that meshes with the second gear 232. The second gear 232 is located in front of the rack 233 and meshes with it, with its axial direction along the height direction of the housing 21. The first gear 231 and the second gear 232 are coaxially arranged, therefore the axial direction of the first gear 231 is also along the height direction of the housing 21.

[0055] In other embodiments, the damper 22 may also be disposed on the right inner wall of the housing 21.

[0056] In other embodiments, the damper 22 may also be disposed on the front or rear side of the inner wall of the housing 21.

[0057] In other embodiments, there may be multiple second gears 232, all of which are coaxially connected, and correspondingly, an equal number of racks 233 and dampers 22 need to be added.

[0058] In one embodiment, the connecting assembly includes four connecting cables 24, with an included angle of 90° between any two adjacent connecting cables 24.

[0059] Four connecting cables 24 extend from the front, rear, left, and right sides of the housing 21, respectively, and are perpendicular to their respective sides. The ends of the four connecting cables extending from the housing 21 are connected to the connecting posts 12 of the frame 1, while the ends inside the housing 21 are connected to the first gear 231. When the frame 1 vibrates, the housing 21 rotates around the ball bearing 3, and the four connecting cables 24 also move accordingly, driving the first gear 231 to rotate. The direction and angle of rotation of the first gear 231 depend on the direction of vibration of the frame 1 and the deformation during vibration. The four connecting cables 24, arranged along the four directions, can respond to vibrations in any direction of the frame 1.

[0060] In other embodiments, the included angle between adjacent connecting cables 24 can be acute or obtuse.

[0061] In other embodiments, two connecting cables 24 may also be provided, for example, one connecting cable 24 extends from the left side of the housing 21 and the other connecting cable 24 extends from the front side of the housing 21.

[0062] In one embodiment, the connecting cable 24 is a chain.

[0063] The connecting cable 24 is preferably a chain that can engage with the toothed structure on the first gear 231.

[0064] In other embodiments, the first gear 231 can also be replaced by a toothless disc. In this case, the connecting cable 24 can be a regular rope instead of a chain, with its end wrapped around the disc, which can also drive the disc to rotate.

[0065] In one embodiment, the frame 1 includes: support piles 11, connecting columns 12 and diagonal braces 13. The four support piles 11 are symmetrically arranged in pairs on the seabed, and each support pile 11 is provided with a connecting column 12. Diagonal braces 13 are provided between two adjacent connecting columns 12.

[0066] Four support piles 11 are driven into the seabed, arranged symmetrically in pairs, approximately at the four corners of a square. Each support pile 11 is equipped with a connecting column 12, and the support pile 11 and the connecting column 12 are connected by welding. The four connecting columns 12 are inclined, meaning that the shape formed by the four connecting columns 12 is approximately a truncated pyramid with a small top dimension and a large base dimension. Between two adjacent connecting columns 12, i.e., on the side of the truncated pyramid, multiple diagonal braces 13 are provided, and the diagonal braces 13 are arranged in pairs at intervals along the axial direction of the connecting column 12.

[0067] In one embodiment, the diameter of the connecting post 12 increases from top to bottom.

[0068] In other words, the connecting column 12 is not only inclined, but also a variable-diameter column, with a smaller diameter at the top and a larger diameter at the bottom. This type of connecting column 12 conforms to its stress characteristics, reducing material consumption and the overall weight of the jacket while ensuring support stability.

[0069] In one embodiment, a vibration damping support 4 is also provided on the top of the frame 1.

[0070] The vibration damping support 4 includes a base plate and multiple rubber vibration damping components. In this embodiment, a total of eight rubber vibration damping components are provided. The bottom end of each rubber vibration damping component is fixed to the base plate, and the top end can be connected to the wind turbine generator set installed on the jacket. The vibration damping support 4 can provide vibration damping in the vertical direction and is generally only used in special situations such as earthquakes. When a strong earthquake occurs, the rubber vibration damping components vibrate vertically to dampen the vibration and buffer the vibration energy in the vertical direction.

[0071] Since the jacket structure is generally subjected to current loads in the sea and vibrates in the horizontal direction, the vibration damping support 4 is used less frequently. Therefore, in other embodiments, the vibration damping support 4 may not be provided.

[0072] In one embodiment, the housing 21 is hinged to the top of the frame 1 via a ball bearing 3.

[0073] like Figure 2As shown, the ball bearing 3 is located on the bottom surface of the vibration damping bearing 4, and its shape is approximately hemispherical. After the housing 21 is snapped into the ball bearing 3, it can rotate around the ball bearing 3. If conventional bolts or other connectors are used to connect the ball bearing 3 and the housing 21, the bolts are easily corroded by seawater, making it difficult to disassemble the damping vibration damping device 2 later. The snap-fit ​​connection method is not susceptible to corrosion, is more suitable for marine environments, has a longer service life, and facilitates the later disassembly of the damping vibration damping device 2.

[0074] According to an embodiment of the present invention, another aspect provides an offshore wind power structure, which includes: a jacket, a transition seat 5, and a wind turbine tower 6. The structure of the jacket is the same as that in the above embodiments, and therefore will not be described again.

[0075] The adapter 5 is directly mounted on the top of the four connecting columns 12 in the jacket frame and connected to the frame body 1 by bolts. The vibration damping support 4 is mounted on the bottom surface of the adapter 5. The wind turbine tower 6 is mounted on the adapter 5 and connected by a flange on the adapter 5. The wind turbine tower 6 is also a variable diameter structure, with its diameter increasing uniformly from top to bottom.

[0076] This jacket structure can effectively reduce vibration, allowing the wind turbine tower 6 mounted on it to stand stably in the sea. Moreover, the damping vibration reduction device 2 is not directly installed on the wind turbine tower 6, but at the top of the frame 1, which can lower the center of gravity of the offshore wind power structure.

[0077] The vibration reduction process of the offshore wind power structure provided in this embodiment is described below:

[0078] When the jacket vibrates, the housing 21 rotates around the ball bearing 3 in the corresponding direction. After the housing 21 rotates, the internal damper 22 and displacement amplification assembly 23 will also change position accordingly. Since one end of the connecting cable 24 is fixed to the frame 1, the end of the connecting cable 24 connected to the first gear 231 in the displacement amplification assembly 23 will drive the first gear 231 to rotate. The first gear 231 synchronously drives the second gear 232 to rotate, which in turn drives the rack 233 to translate, and then drives the damper 22 to deform, thereby achieving buffering and vibration reduction.

[0079] In special strong earthquake environments such as earthquakes and typhoons, the vibration damping bearing 4 will dampen the vertical vibration.

[0080] 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 catheter holder, characterized in that, include: Frame (1); Damping vibration reduction device (2), the damping vibration reduction device (2) includes: housing (21), damper (22), displacement amplification component (23) and connecting component, the housing (21) is hinged to the top of the frame (1), the damper (22) and the displacement amplification component (23) are disposed inside the housing (21), and the damper (22) is connected to the power output end of the displacement amplification component (23), the connecting component includes multiple connecting cables (24), one end of the connecting cable (24) is connected to the power input end of the displacement amplification component (23), the other end of the connecting cable (24) extends out of the housing (21) and is connected to the frame (1), and two adjacent connecting cables (24) are arranged at an angle; The shell (21) is hinged to the top of the frame (1) via a ball bearing (3); The displacement amplification component (23) includes: a first gear (231), a second gear (232) and a rack (233). The first gear (231) and the second gear (232) are coaxially connected. The first gear (231) is connected to the connecting cable (24). The second gear (232) meshes with the rack (233). The rack (233) is connected to the damper (22). The diameter of the first gear (231) is smaller than the diameter of the second gear (232).

2. The catheter holder according to claim 1, characterized in that, The rack (233) is arranged along the length direction of the housing (21), and the axial directions of the first gear (231) and the second gear (232) are arranged along the height direction of the housing (21).

3. The catheter holder according to claim 2, characterized in that, The connecting assembly includes four connecting cables (24), with an included angle of 90° between two adjacent connecting cables (24).

4. The catheter holder according to claim 3, characterized in that, The connecting cable (24) is a chain.

5. The catheter holder according to claim 1, characterized in that, The top of the frame (1) is also provided with a vibration damping support (4).

6. The catheter holder according to claim 1, characterized in that, The frame (1) includes: support piles (11), connecting columns (12) and diagonal braces (13). The four support piles (11) are symmetrically arranged in pairs on the seabed. Each support pile (11) is provided with a connecting column (12), and diagonal braces (13) are provided between two adjacent connecting columns (12).

7. The catheter holder according to claim 6, characterized in that, The diameter of the connecting column (12) increases from top to bottom.

8. An offshore wind power structure, comprising the jacket structure as described in any one of claims 1-7, characterized in that, It also includes a transition seat (5) and a wind turbine tower (6), wherein the transition seat (5) is disposed on the frame (1) and the wind turbine tower (6) is disposed on the transition seat (5).

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