Self-stabilizing floating type supporting assembly and offshore wind power system

Abstract

The invention discloses a self-stabilizing floating type supporting assembly and an offshore wind power system, and relates to the field of ocean engineering equipment. The supporting assembly comprises a floating box, a vertical vibration reduction assembly and a multi-ring stabilizing assembly; the multi-ring stabilizing assembly comprises an outer supporting ring, an outer support, an inner supporting ring and an inner pin shaft, the outer support is located on the symmetry axis of the outer supporting ring, the inner pin shaft is located on the symmetry axis of the inner supporting ring, and the installation direction of the outer support is perpendicular to the installation direction of the inner pin shaft; each vertical vibration reduction assembly comprises a parallelogram hinge frame and a traction spring, the vertical vibration reduction assemblies are symmetrically arranged in pairs, the outer sides of the parallelogram hinge frames are rigidly connected with the inner side wall of the buoyancy tank, and the top ends of the inner sides of the parallelogram hinge frames are hinged to and supported on the bottom face of an outer supporting ring of the multi-ring stabilizing assembly. One end of the traction spring is hinged to the midpoint of the outer supporting ring of the multi-ring stabilizing assembly, and the other end of the traction spring is hinged to the midpoint of the inner side face of the buoyancy tank. According to the invention, the stability of the offshore wind power system can be realized without additional active control.

Description

Technical Field

[0001] The present invention relates to the field of marine engineering equipment, and in particular to a self-stabilizing floating support assembly and an offshore wind power system. Background Art

[0002] Offshore wind power systems mainly use deep foundation or floating foundation structures. The underwater foundation construction cost and construction difficulty of deep foundation offshore wind power systems are extremely high, while floating offshore wind power systems mainly use upright towers to support the upper wind turbines. The design requires key consideration and control of the large vertical and horizontal swing effects of the floating foundation caused by ocean waves. The tower swing directly affects the operational stability and efficiency of the wind turbine, and can even affect the safety of the wind turbine in severe cases. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a self-stabilizing floating support assembly and an offshore wind power system in response to the background requirements and technical difficulties described in the above-mentioned background technology. The present invention realizes vertical vibration reduction and swing effect reduction through a dual component design, provides a stable vertical support force for the wind power tower, and realizes self-stabilization of the offshore wind power system.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a self-stabilizing floating support assembly, comprising a buoyancy box, a vertical vibration reduction assembly and a multi-ring stabilization assembly; the multi-ring stabilization assembly comprises an outer support ring, an outer bracket, an inner support ring and an inner pin shaft, the outer bracket is located on the symmetry axis of the outer support ring, the inner pin shaft is located on the symmetry axis of the inner support ring, and the installation direction of the outer bracket is perpendicular to the installation direction of the inner pin shaft; the vertical vibration reduction assembly comprises a parallelogram hinge frame and a tension spring, the parallelogram hinge frame has two groups, and is relatively parallelly arranged, the tension spring is located in the middle of the two groups of parallelogram hinge frames, the vertical vibration reduction assembly is symmetrically arranged in pairs, the outer side of the parallelogram hinge frame is rigidly connected to the inner side wall of the buoyancy box, the inner top end of the parallelogram hinge frame is hingedly supported on the bottom surface of the outer support ring of the multi-ring stabilization assembly, one end of the tension spring is hingedly connected to the midpoint of the outer support ring of the multi-ring stabilization assembly, and the other end is hingedly connected to the midpoint of the inner side surface of the buoyancy box.

[0005] Furthermore, the buoyancy box may be of a block type or an integral ring type. When the block type is adopted, the buoyancy boxes are preferably connected by traction ropes.

[0006] Furthermore, the parallelogram hinged frame includes an outer vertical rod, an oblique rod and an inner vertical rod, the outer vertical rod and the inner vertical rod have the same length, and the outer vertical rod, the inner vertical rod and the oblique rod are hinged by a pin to form a parallelogram mechanism with variable shape.

[0007] Furthermore, the outer support ring and the inner support ring may be square, rectangular or annular and made of rigid materials such as concrete or steel. The outer bracket and the inner pin shaft may be made of steel to ensure sufficient strength and rigidity.

[0008] Furthermore, the outer support may adopt a fixed or embedded structure. In the fixed structure, the outer support is fixed to the inner side of the outer supporting ring, a through hole is opened at the corresponding position of the inner supporting ring, and the outer support is inserted into the through hole on the inner supporting ring to realize a pin-type rotatable connection; in the embedded structure, through holes are opened on both the outer supporting ring and the inner supporting ring, and the outer support is a rigid pin structure, which is inserted into the through holes of the outer supporting ring and the inner supporting ring to realize a pin-type rotatable connection.

[0009] Furthermore, the inner pin shaft is a rigid through pin shaft fixed on the inner supporting ring.

[0010] The present invention also provides an offshore wind power system including the above-mentioned self-stabilizing floating support assembly, including a wind turbine, a tower, a self-stabilizing floating support assembly, a pontoon mooring cable and a tower mooring cable; the middle section of the tower is supported on the inner pin shaft of the self-stabilizing floating support assembly, the lower end of the tower is anchored to the seabed by the tower mooring cable, the pontoon of the self-stabilizing floating support assembly is anchored to the seabed by the pontoon mooring cable, and the wind turbine is installed on the top of the tower.

[0011] Furthermore, a through hole is reserved in the middle section of the tower, and the inner diameter of the through hole is 5-10 mm larger than the inner pin shaft to meet the construction tolerance of large-size components and the rotatable connection of the tower.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention reduces the up and down floating and swaying effects of the filtering pontoon caused by the fluctuations of the waves through a deformable and rotatable component device. Specifically, the up and down fluctuations of the pontoon driven by the waves are reduced at the first level through the deformation of the vertical vibration reduction component and the expansion and contraction of the tension spring. The swaying effect of the up and down movement of the pontoon is reduced at the second level through the rotation of the inner support ring and the outer support ring in the multi-ring stabilization component around two mutually perpendicular axis directions. Under the fluctuations of the waves, the inner pin shaft remains horizontal and stably supports the tower, so that the stability of the offshore wind power system can be achieved without additional active control. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an offshore wind power system of the present invention; Figure 2 It is a structural schematic diagram of a self-stabilizing floating support assembly of the present invention; Figure 3 It is a schematic diagram of the deformation of the self-stabilizing floating support assembly under the misaligned swing of the pontoon; Figure 4It is a partial schematic diagram of the self-stabilizing floating support assembly under the misaligned swing of the pontoon; Figure 5 It is a schematic diagram of the structure of an outer support ring using a fixed inner support; Figure 6 It is a schematic diagram of the structure of an inner support ring using a fixed inner support; Figure 7 This is a schematic diagram of the tower after the inner support ring is pre-installed; Explanation of the reference numerals in the figure: 1. wind turbine, 2. tower, 3. self-stabilizing floating support assembly, 4. pontoon mooring cable, 5. tower mooring cable, 31. pontoon, 32. outer support ring, 33. inner support ring, 34. inner pin shaft, 35. parallelogram hinge frame, 36. tension spring, 37. traction rope, 351. diagonal rod, 352. inner vertical rod, 353. outer vertical rod, 321. outer support, 331. through hole. DETAILED DESCRIPTION

[0014] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments, not all of the embodiments. Based on this embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] Reference Figures 1 to 7 The present embodiment provides a self-stabilizing floating support assembly 3, comprising a pontoon 31, a vertical vibration reduction assembly and a multi-ring stabilizing assembly; the multi-ring stabilizing assembly comprises an outer support ring 32, an outer bracket 321, an inner support ring 33 and an inner pin 34, the outer bracket 321 is located on the symmetry axis of the outer support ring 32, the inner pin 34 is located on the symmetry axis of the inner support ring 33, and the installation direction of the outer bracket 321 is perpendicular to the installation direction of the inner pin 34; the vertical vibration reduction assembly comprises a parallelogram hinge frame 35 and a tension spring 36, the parallelogram There are two groups of parallelogram hinged frames 35, which are arranged relatively parallel to each other. The tension spring 36 is located in the middle of the two groups of parallelogram hinged frames 35. The vertical vibration damping components are symmetrically arranged in pairs. The outer side of the parallelogram hinged frame 35 is rigidly connected to the inner wall of the pontoon 31. The inner top end of the parallelogram hinged frame 35 is hingedly supported on the bottom surface of the outer support ring 32 of the multi-ring stabilization component. One end of the tension spring 36 is hingedly connected to the midpoint of the outer support ring 32 of the multi-ring stabilization component, and the other end is hingedly connected to the midpoint of the inner side surface of the pontoon 31.

[0016] Specifically, the pontoon 31 is of block type, and adjacent pontoons 31 are connected by traction ropes 37. Of course, the pontoon 31 can also be of integral ring type.

[0017] Specifically, the parallelogram hinged frame 35 includes an outer vertical rod 353, an oblique rod 351 and an inner vertical rod 352. The outer vertical rod 353 and the inner vertical rod 352 have the same length. The outer vertical rod 353, the inner vertical rod 352 and the oblique rod 351 are hinged by a pin to form a parallelogram mechanism with variable shape.

[0018] Specifically, the outer support ring 32 and the inner support ring 33 are square, and of course, they can also be designed as rectangular or ring. The outer support ring 32 and the inner support ring 33 are made of rigid materials such as concrete or steel, and the outer bracket 321 and the inner pin shaft 34 are made of steel to ensure sufficient strength and rigidity.

[0019] Specifically, the outer support 321 can be fixed or embedded. Figure 5 and Figure 6 The outer support 321 is fixed to the inner side of the outer support ring 32, and a through hole 331 is opened at a corresponding position of the inner support ring 33. The outer support 321 is inserted into the through hole 331 on the inner support ring 33 to realize a pin-type rotatable connection.

[0020] In the embedded structure, through holes 331 are opened on the outer support ring 32 and the inner support ring 33. The outer support 321 is a rigid pin structure, which penetrates into the through holes 331 of the outer support ring 32 and the inner support ring 33 to realize a pin-type rotatable connection.

[0021] Specifically, the inner pin shaft 34 is a rigid through pin shaft fixed on the inner support ring 33 .

[0022] The present embodiment also provides an offshore wind power system including the above-mentioned self-stabilizing floating support assembly, including a wind turbine 1, a tower 2, a self-stabilizing floating support assembly 3, a pontoon mooring cable 4 and a tower mooring cable 5; the middle section of the tower 2 is supported on the inner pin shaft 34 of the self-stabilizing floating support assembly 3, the lower end of the tower 2 is anchored to the seabed through the tower mooring cable 5, the pontoon 31 of the self-stabilizing floating support assembly 3 is anchored to the seabed through the pontoon mooring cable 4, and the wind turbine 1 is installed on the top of the tower 2.

[0023] Specifically, a through hole is reserved in the middle section of the tower 2 , and the inner diameter of the through hole is 5-10 mm larger than the inner pin shaft 34 to meet the construction tolerance of large-size components and the rotatable connection of the tower 2 .

[0024] This embodiment also provides a method for installing the offshore wind power system, and the specific steps are as follows: (1) The inner pin shaft 34 and the inner support ring 33 are pre-installed with the tower 2 in the factory; (2) The floating block is installed and connected with the outer vertical rod 353 and the tension spring 36 of the vertical vibration reduction assembly; (3) Transport the floating blocks to the installation location, install the traction rope 37 between the floating blocks, and temporarily fix the position of the floating blocks; (4) Connecting the outer support ring 32 of the multi-ring stabilization assembly to the inner vertical rod 352 of the vertical vibration reduction assembly; (5) The tower 2 is hoisted into place, and the inner support ring 33 is connected to the outer support ring 32; (6) Installing pontoon mooring cables 4 and tower mooring cables 5; (7) Install the fan 1 on the top of the tower 2.

[0025] The present invention uses a deformable and rotatable component device to reduce the up and down floating and swinging effects of the filtering pontoon 31 caused by the fluctuations of the waves. The up and down fluctuations of the pontoon 31 driven by the waves are reduced at the first level through the deformation of the vertical vibration reduction component and the expansion and contraction of the pull spring 36. The swinging effect of the up and down displacement of the pontoon 31 is reduced at the second level through the rotation of the inner support ring 33 and the outer support ring 32 in the multi-ring stabilization component around two mutually perpendicular axis directions. Under the fluctuations of the waves, the inner pin shaft 34 remains horizontal and stably supports the tower 2, and the stability of the offshore wind power system can be achieved without additional active control.

[0026] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A self-stabilizing floating support assembly, characterized in that: It includes a buoyancy box, a vertical vibration reduction assembly and a multi-ring stabilization assembly; the multi-ring stabilization assembly includes an outer supporting ring, an outer bracket, an inner supporting ring and an inner pin shaft, the outer bracket is located on the symmetry axis of the outer supporting ring, the inner pin shaft is located on the symmetry axis of the inner supporting ring, and the installation direction of the outer bracket is perpendicular to the installation direction of the inner pin shaft; the vertical vibration reduction assembly includes a parallelogram hinged frame and a tension spring, the parallelogram hinged frames have two groups, and are arranged relatively parallel, the tension spring is located in the middle of the two groups of parallelogram hinged frames, the vertical vibration reduction assembly is symmetrically arranged in pairs, the outer side of the parallelogram hinged frame is rigidly connected to the inner side wall of the buoyancy box, the inner top end of the parallelogram hinged frame is hingedly supported on the bottom surface of the outer supporting ring of the multi-ring stabilization assembly, one end of the tension spring is hingedly connected to the midpoint of the outer supporting ring of the multi-ring stabilization assembly, and the other end is hingedly connected to the midpoint of the inner side surface of the buoyancy box.

2. The self-stabilizing floating support assembly according to claim 1, characterized in that: The buoyancy box adopts a block type or an integral ring type. When the block type is adopted, the buoyancy boxes are tied together by traction ropes.

3. The self-stabilizing floating support assembly according to claim 1 or 2, characterized in that: The parallelogram hinged frame comprises an outer vertical rod, an oblique rod and an inner vertical rod. The outer vertical rod and the inner vertical rod have the same length. The outer vertical rod, the inner vertical rod and the oblique rod are hinged by a pin shaft to form a parallelogram mechanism with variable shape.

4. The self-stabilizing floating support assembly according to claim 1 or 2, characterized in that: The outer supporting ring and the inner supporting ring are square, rectangular or annular and are made of concrete or steel. The outer bracket and the inner pin shaft are made of steel.

5. The self-stabilizing floating support assembly according to claim 1 or 2, characterized in that: The outer support adopts a fixed or embedded structure. In the fixed structure, the outer support is fixed to the inner side of the outer supporting ring, and a through hole is opened at the corresponding position of the inner supporting ring. The outer support is inserted into the through hole on the inner supporting ring to realize a pin-type rotatable connection; in the embedded structure, through holes are opened on both the outer supporting ring and the inner supporting ring. The outer support is a rigid pin structure and is inserted into the through holes of the outer supporting ring and the inner supporting ring to realize a pin-type rotatable connection.

6. The self-stabilizing floating support assembly according to claim 1 or 2, characterized in that: The inner pin shaft is a rigid through pin shaft fixed on the inner supporting ring.

7. An offshore wind power system comprising the self-stabilizing floating support assembly according to any one of claims 1 to 6, characterized in that: It includes a wind turbine, a tower, a self-stabilizing floating support assembly, a pontoon mooring cable and a tower mooring cable; the middle section of the tower is supported on the inner pin shaft of the self-stabilizing floating support assembly, the lower end of the tower is anchored to the seabed through the tower mooring cable, the pontoon of the self-stabilizing floating support assembly is anchored to the seabed through the pontoon mooring cable, and the wind turbine is installed on the top of the tower.

8. The offshore wind power system according to claim 7, characterized in that: A through hole is reserved in the middle section of the tower, and the inner diameter of the through hole is 5-10mm larger than the inner pin shaft.

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