Jacket and offshore wind power structure

Abstract

The invention relates to the technical field of offshore wind power, and discloses a jacket and an offshore wind power structure. The jacket comprises a jacket body and a damping device. The damping vibration attenuation device comprises a shell, a damper, a displacement amplification assembly and a connecting assembly, the shell is hinged to the top of the frame body, the damper and the displacement amplification assembly are arranged in the shell, the damper is connected with the power output end of the displacement amplification assembly, and the connecting assembly comprises a plurality of connecting cables; one end of each connecting cable is connected with the power input end of the displacement amplification assembly, the other end of each connecting cable extends out of the shell and is connected to the frame body, and an included angle is formed between every two adjacent connecting cables. The damping vibration attenuation device in the jacket can amplify displacement, so that the damper can fully play a vibration attenuation role, vibration attenuation in multiple directions can be achieved, the vibration attenuation effect is good, and the jacket can be used in a complex flow load environment in the ocean.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and in particular to a conductor pipe and an offshore wind power structure. Background Art

[0002] As one of the most abundant renewable energy resources, wind energy has become one of the key development targets of renewable energy in recent years. Compared with onshore wind energy resources, my country's offshore wind energy resources are more abundant. According to statistics, the total reserves of wind energy resources within 50m offshore my country are 883 million kilowatts, and the technically exploitable amount is 570 million kilowatts. Compared with onshore wind power, offshore wind power development has the advantages of saving land resources, high wind speed, and proximity to the power load center. Offshore wind power development has become an important direction for the development of my country's wind energy industry. With the continuous improvement of offshore wind energy resource development, offshore wind energy resources have gradually shifted from near shallow sea to transitional water depth (30-60m). In transitional water depth, single-pile offshore wind power support structure is no longer applicable due to structural instability and sharp cost growth. The jacket offshore wind power support structure has the advantages of convenient installation in transitional water depth and reasonable economic cost, and has gradually become the best choice for offshore wind power development in transitional water depth.

[0003] As the water depth increases, the design size of the offshore wind turbine structure continues to increase, and the wave and flow loads acting on the jacket significantly increase, thereby increasing the vibration of the jacket structure; and the frequency range of the marine environmental load is relatively wide, which will also cause the resonant response of the jacket structure. The vibration response of the jacket will affect its support stability. At present, the ways to reduce the vibration response of the jacket include: increasing the structural stiffness of the jacket, but this method will also increase production costs and reduce economic benefits; adding dampers (such as tuned mass dampers) at locations with large deformations such as the top and middle of the wind turbine tower, but the dampers are difficult to fully play a vibration reduction role when the deformation is small, and most dampers can only reduce vibrations in a single degree of freedom direction, which cannot meet the use of complex marine flow load environments, and the vibration reduction effect is poor. Summary of the invention

[0004] In view of this, the present invention provides a conductor frame and an offshore wind power structure to solve the problem that the existing damper is difficult to fully play a vibration reduction role when the vibration deformation of the conductor frame is small, and can only reduce vibration in a single degree of freedom direction, cannot meet the needs of complex ocean flow load environments, and has a poor vibration reduction effect.

[0005] In a first aspect, the present invention provides a pipe frame, comprising:

[0006] Frame;

[0007] A damping vibration reduction device, the damping vibration reduction device comprising: a shell, a damper, a displacement amplification component and a connecting component, the shell is hingedly arranged on the top of the frame, the damper and the displacement amplification component are arranged in the shell, and the damper is connected to the power output end of the displacement amplification component, the connecting component comprises a plurality of connecting cables, one end of the connecting cable is connected to the power input end of the displacement amplification component, the other end of the connecting cable extends out of the shell and is connected to the frame, and two adjacent connecting cables are arranged at an angle.

[0008] Beneficial Effects

[0009] When the conductor frame is subjected to flow loads such as waves, it will produce a vibration response. When the conductor frame vibrates, it will drive the connecting cable to move, and the connecting cable will apply force to the displacement amplification component. The displacement amplification component amplifies the smaller displacement of the frame when it vibrates and then transmits it to the damper, which performs buffering and vibration reduction. This damping and vibration reduction device can amplify the displacement, so that the damper can fully play its vibration reduction role, and the connecting cable extends from different directions of the shell to connect to the frame, which can achieve vibration reduction in multiple degrees of freedom. The vibration reduction effect is good and can meet the needs of use in complex flow load environments in the ocean.

[0010] In an optional embodiment, the shell is hinged to the top of the frame through a ball bearing.

[0011] Beneficial Effects

[0012] After the shell is hinged to the ball support, the damping 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, the first gear and the second gear are coaxially connected, the first gear is connected to the connecting cable, the second gear is meshed 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, and 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, displacement amplification can be achieved, allowing the damper to undergo a larger deformation, which can better play the damping role of the damper.

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

[0017] In an optional embodiment, the connection assembly includes four connection cables, and the angle between two adjacent connection cables is 90°.

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

[0019] Beneficial Effects

[0020] The connecting rope is preferably a chain that can better mesh with the first gear to 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 tremor strikes, the vibration-damping bearing can effectively weaken the vertical vibration.

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

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

[0026] In a second aspect, the present invention further provides an offshore wind power structure, comprising: the above-mentioned conductor pipe frame, an adapter and a wind turbine tower, wherein the adapter is arranged on the frame body, and the wind turbine tower is arranged on the adapter.

[0027] Beneficial Effects

[0028] Because the offshore wind power structure includes a conductor pipe, it has the same effect as the conductor pipe and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of an offshore wind power structure of the present invention;

[0031] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A;

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

[0033] Description of reference numerals:

[0034] 1. frame, 11. supporting piles, 12. connecting columns, 13. diagonal braces;

[0035] 2. damping 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. Ball bearing;

[0037] 4. Vibration-damping bearing;

[0038] 5. Adapter;

[0039] 6. Wind turbine tower. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, 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] Combine the following Figures 1 to 3 , describing an embodiment of the present invention.

[0045] According to an embodiment of the present invention, on the one hand, a catheter frame is provided, which comprises: a frame body 1 and a damping vibration reduction device 2. The damping vibration reduction device 2 comprises: a shell 21, a damper 22, a displacement amplification component 23 and a connection component. The shell 21 is hingedly arranged on the top of the frame body 1, the damper 22 and the displacement amplification component 23 are arranged in the shell 21, and the damper 22 is connected to the power output end of the displacement amplification component 23. The connection component comprises a plurality of 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 shell 21 and is connected to the frame body 1, and two adjacent connecting cables 24 are arranged at an angle.

[0046] The jacket can be used as the supporting foundation of an offshore wind turbine, wherein the frame 1 is a steel structure supporting body. The frame 1 is set in the sea and will be subjected to the action of wave and other flow loads, thereby generating a vibration response. Under normal operating conditions, the vibration of the frame 1 is mainly vibration in the horizontal plane direction, but this vibration is not in a single direction, but may be in any direction of the horizontal plane. The hinge connection between the shell 21 and the frame 1 is equivalent to the hinge connection between the entire damping vibration reduction device 2 and the frame 1. When the frame 1 vibrates, the damping vibration reduction device 2 will rotate accordingly. At this time, one end of the connecting cable 24 is restricted from being fixedly connected to the frame 1, and the other end will apply a force to the power input end of the displacement amplification component 23. The displacement amplification component 23 can amplify the smaller deformation generated when the frame 1 vibrates, and then the power output end of the displacement amplification component 23 applies a force to the damper 22, so that the damper 22 is deformed to reduce vibration. The deformation of the damper 22 is amplified by the displacement amplification component 23 and is larger than the deformation when the frame 1 vibrates.

[0047] The jacket frame can reduce vibration when the frame body 1 vibrates by setting a damping vibration reduction device 2, thereby improving the stability of the jacket frame. Since the deformation of the frame body 1 is small when it vibrates, it is directly transmitted to the damper 22, which will affect the vibration reduction effect of the damper 22. Therefore, the displacement amplification component 23 in the damping vibration reduction device 2 is required to amplify the displacement, so as to amplify the small deformation of the frame body 1 when it vibrates and transmit it to the damper 22. The damper 22 can have a larger deformation, thereby fully exerting its vibration reduction effect. The direction of the wave and current load is any direction of the sea level, and the shell 21 is hinged to the frame body 1. Therefore, when the frame body 1 vibrates in any direction, the shell 21 can rotate accordingly, and multiple connecting cables 24 extend from different directions to the shell 21 and are connected to the frame body 1. When the shell 21 rotates in any direction, the corresponding connecting cable 24 will apply a force to the displacement amplification component 23, thereby achieving multi-directional vibration reduction, meeting the use requirements of the jacket frame in the marine environment with complex and diverse wave and current loads, and having a good vibration reduction effect.

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

[0049] The damper 22 is preferably a viscous damper 22, which is made based on the principle that a fluid will generate throttling resistance when passing through a throttling hole in the fluid motion principle. It is a damper 22 related to the piston movement speed, and the reciprocating motion of the piston drives the flow of the internal damping medium, thereby generating 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 rope 24, the second gear 232 is meshed with the rack 233, the rack 233 is connected to the damper 22, and 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 vibration of the frame 1 drives the position of the connecting cable 24 to change, the connecting cable 24 will drive the first gear 231 to rotate. The first gear 231 is coaxially connected with the second gear 232, that is, the two rotate synchronously, but because 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 move horizontally. The rack 233 moves horizontally and then drives the damper 22 to deform to consume vibration energy and perform vibration reduction.

[0052] The displacement amplifying component 23 can transform the smaller deformation of the frame 1 into a larger deformation of the damper 22 when it vibrates, so as to fully exert the vibration reduction performance of the damper 22. At the same time, the rotational motion applied by the connecting rope 24 in all directions to the first gear 231 can be transformed into the translational motion of the rack 233, so that the damper 22 is deformed to achieve vibration reduction.

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

[0054] like Figure 3As shown, the housing 21 is in the shape of a rectangular parallelepiped, and the rack 233 in the displacement amplification component 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 arranged on the left inner wall or the right inner wall of the housing 21. In this embodiment, the damper 22 is arranged on the left inner wall of the housing 21, the left end of the rack 233 is connected to the damper 22 through the connecting rod 25, and one side of the rack 233 has a toothed structure that meshes with the second gear 232. The second gear 232 is located at the front side of the rack 233 and meshes with the rack 233, and its axial direction is along the height direction of the housing 21. The first gear 231 and the second gear 232 are coaxially arranged, so the axial direction of the first gear 231 is also arranged 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 side or the rear side of the inner wall of the housing 21 .

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

[0058] In one embodiment, the connection assembly includes four connection cables 24, and the angle between two adjacent connection cables 24 is 90°.

[0059] The four connecting cables 24 extend from the front side, rear side, left side and right side of the shell 21 respectively, and the four connecting cables 24 are perpendicular to the corresponding sides. The ends of the four connecting cables 24 extending from the shell 21 are connected to the connecting column 12 of the frame 1, and the ends located inside the shell 21 are connected to the first gear 231. When the frame 1 vibrates, the shell 21 rotates around the ball support 3, and the four connecting cables 24 also have corresponding movements to drive the first gear 231 to rotate. The rotation direction and rotation angle of the first gear 231 depend on the vibration direction of the frame 1 and the deformation amount during vibration. The four connecting cables 24 arranged along four directions can respond to the vibration of the frame 1 in any direction.

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

[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 rope 24 is preferably a chain that can cooperate with the toothed structure on the first gear 231 .

[0064] In other embodiments, the first gear 231 may be replaced by a disc without teeth. In this case, the connecting rope 24 may not be a chain but an ordinary rope, with the end wound 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. Four support piles 11 are symmetrically arranged on the seabed in pairs. A connecting column 12 is arranged on each support pile 11, and a diagonal brace 13 is arranged between two adjacent connecting columns 12.

[0066] Four support piles 11 are driven into the seabed and arranged symmetrically in pairs, approximately at the four corners of a square. A connecting column 12 is provided on each support pile 11, and the support pile 11 and the connecting column 12 are connected by welding. The four connecting columns 12 are arranged obliquely, that is, the shape formed by the four connecting columns 12 is approximately a quadrangular pyramid, with a small top surface size and a large bottom surface size. Between two adjacent connecting columns 12, that is, on the side of the quadrangular pyramid, a plurality of diagonal braces 13 are provided, and the diagonal braces 13 are arranged in pairs and cross each other along the axial direction of the connecting column 12.

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

[0068] That is to say, the connecting column 12 is not only inclined, but also a column with a variable diameter, with a small diameter at the upper end and a large diameter at the lower end of the connecting column 12. Such a connecting column 12 meets its force characteristics, reduces material consumption while ensuring support stability, and reduces the overall weight of the catheter rack.

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

[0070] The vibration-damping support 4 includes: a plurality of rubber vibration-damping parts on the bottom plate. In this embodiment, a total of eight rubber vibration-damping parts are provided. The bottom ends of the rubber vibration-damping parts are fixed to the bottom plate, and the top ends can be connected to the wind turbine generator set provided on the conductor frame. After the vibration-damping support 4 is provided, vibration reduction can be performed in the vertical direction, which is generally only used in special situations such as earthquakes. When a strong earthquake occurs, the rubber vibration-damping parts vibrate in the vertical direction to reduce vibration and buffer the vibration energy in the vertical direction.

[0071] Since the jacket is generally vibrated in the horizontal direction under the action of current load in the sea, the vibration-damping support 4 is used less frequently, and therefore the vibration-damping support 4 may not be provided in other embodiments.

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

[0073] like Figure 2As shown, the ball support 3 is arranged on the bottom surface of the vibration reduction support 4, and its shape is approximately hemispherical. After the housing 21 is connected with the ball support 3 by a buckle, it can rotate around the ball support 3. If conventional bolts or other connecting parts are used to connect the ball support 3 and the housing 21, the bolts are easily corroded by seawater, and it is difficult to disassemble the damping vibration reduction device 2 later. The buckle connection method will not be corroded, is more suitable for use in the marine environment, has a longer service life, and is also convenient for disassembling the damping vibration reduction device 2 later.

[0074] According to an embodiment of the present invention, on the other hand, an offshore wind power structure is provided, comprising: a jacket, an adapter 5 and a wind turbine tower 6. The structure of the jacket is the same as that of the jacket in the above embodiment, so it will not be described again.

[0075] The adapter 5 is directly arranged at the top of the four connection columns 12 in the pipe frame and connected to the frame body 1 by bolts. The vibration reduction support 4 is arranged on the bottom surface of the adapter 5. The wind turbine tower 6 is arranged on the adapter 5 and connected by the flange on the adapter 5. The wind turbine tower 6 is also a variable diameter structure, and its diameter increases uniformly from top to bottom.

[0076] This kind of pipe frame can effectively reduce vibration, so that the wind turbine tower 6 installed on it can stand stably in the sea. In addition, the damping vibration reduction device 2 is not directly set on the wind turbine tower 6, but on 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 by this embodiment is described as follows:

[0078] When the catheter frame vibrates, the housing 21 will rotate in the corresponding direction around the ball support 3. After the housing 21 rotates, the internal damper 22 and the displacement amplification component 23 will also have corresponding position changes. Since one end of the connecting cable 24 is fixed by the frame 1, the end of the connecting cable 24 connected to the first gear 231 in the displacement amplification component 23 will drive the first gear 231 to rotate. The first gear 231 synchronously drives the second gear 232 to rotate, and then drives the rack 233 to translate, and then drives the damper 22 to deform, so as to achieve buffering and vibration reduction.

[0079] In special strong earthquake environments such as earthquakes and typhoons, the vibration-damping support 4 will reduce the vibration in the vertical direction.

[0080] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A catheter rack, characterized in that: include: Frame (1); A damping vibration reduction device (2), the damping vibration reduction device (2) comprising: a shell (21), a damper (22), a displacement amplification component (23) and a connection component, the shell (21) being hingedly arranged on the top of the frame (1), the damper (22) and the displacement amplification component (23) being arranged in the shell (21), and the damper (22) being connected to the power output end of the displacement amplification component (23), the connection component comprising a plurality of connection cables (24), one end of the connection cable (24) being connected to the power input end of the displacement amplification component (23), the other end of the connection cable (24) extending out of the shell (21) and connected to the frame (1), and two adjacent connection cables (24) being arranged at an angle.

2. The pipe rack according to claim 1, characterized in that: The shell (21) is hinged to the top of the frame (1) via a ball support (3).

3. The pipe rack according to claim 2, characterized in that: The displacement amplification component (23) comprises: 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 rope (24); the second gear (232) is meshed with the rack (233); the rack (233) is connected to the damper (22); and the diameter of the first gear (231) is smaller than the diameter of the second gear (232).

4. The pipe rack according to claim 3, 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).

5. The pipe rack according to claim 4, characterized in that: The connection assembly comprises four connection cables (24), and the angle between two adjacent connection cables (24) is 90°.

6. The catheter rack according to claim 5, characterized in that: The connecting rope (24) is a chain.

7. The pipe rack according to claim 1, characterized in that: A vibration-damping support (4) is also provided on the top of the frame (1).

8. The pipe rack according to claim 1, characterized in that: The frame (1) comprises: support piles (11), connecting columns (12) and diagonal braces (13); four support piles (11) are symmetrically arranged on the seabed in pairs; a connecting column (12) is arranged on each support pile (11); and a diagonal brace (13) is arranged between two adjacent connecting columns (12).

9. The pipe rack according to claim 8, characterized in that: The diameter of the connecting column (12) increases from top to bottom.

10. An offshore wind power structure, comprising the jacket according to any one of claims 1 to 9, characterized in that: It also comprises an adapter seat (5) and a wind turbine tower (6), wherein the adapter seat (5) is arranged on the frame (1), and the wind turbine tower (6) is arranged on the adapter seat (5).

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