Composite floating type fan foundation and fan system

Abstract

The utility model relates to the field of ocean engineering, and discloses a composite floating type fan foundation and a fan system, which comprise a main upright post, side upright posts and a mooring system, the side upright posts are uniformly arranged by taking the main upright post as a center, the main upright post is connected with each side upright post through support rods, and a plurality of damping plates are arranged along the outer surfaces of the side upright posts; a mooring system restraining device is installed in the main stand column, and the mooring system is connected with the mooring system restraining device. The semi-submersible floating foundation structure has the advantages of both a Spar type foundation structure and a semi-submersible floating foundation structure, has the advantages of small heaving amplitude and small swinging motion, and is high in adaptability to water depth.

Description

Technical Field

[0001] The utility model relates to the field of marine engineering, in particular to a composite floating fan foundation and a fan system. Background Art

[0002] The statements in this section merely mention the background technology related to the present utility model and do not necessarily constitute the prior art.

[0003] In recent years, the development of onshore and offshore wind power resources has become saturated, and it is an inevitable trend for offshore wind power to move from nearshore to deep sea. In the environmental conditions of deep sea, fixed foundations have obvious disadvantages, while floating foundations have outstanding advantages. Common offshore floating wind power foundations are mainly divided into three categories: tension leg platform (TLP: Tension Leg Platform) foundation, single column (Spar) foundation and semi-submersible foundation. The disadvantages of TLP foundation are its high installation cost, easy to produce high-order elastic vibration, and relatively high requirements for seabed geology. The advantages of TLP foundation are high stability, small wave load and operation response. The advantages of Spar foundation are good hydrodynamic performance and adaptability to complex sea areas. Its main disadvantages are that the span of structural size is too large, which makes it difficult to manufacture and install, and the manufacturing cost is high. The semi-submersible foundation mainly includes columns, buoys and connecting trusses. The buoys are connected to each other by connecting rods to form a whole, and the positioning is completed by a mooring system in the form of a catenary. Most of the existing semi-submersible wind turbine foundations use a "column, pontoon and connecting truss" structure. The columns are short in the water, the overall center of gravity of the wind turbine is high, and the volume of the pontoon, which is mainly used to provide buoyancy, is large. In this case, the wave force acting on the foundation is also large, which is easy to produce large-amplitude longitudinal and transverse rolling movements, and the structural stability is insufficient. Utility Model Content

[0004] In order to address the deficiencies of the prior art, the first aspect of the utility model provides a composite floating wind turbine foundation, which has the advantages of both Spar-type and semi-submersible floating foundation structures, and at the same time has the advantages of small heave amplitude and small swing motion, and has strong adaptability to water depth.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A composite floating wind turbine foundation comprises a main column, side columns evenly arranged with the main column as the center, and a mooring system. The main column and each side column are connected by a strut, and a plurality of damping plates are arranged along the outer surface of the side column; a mooring system restraint device is installed inside the main column, and the mooring system is connected to the mooring system restraint device.

[0007] Furthermore, the main column is a buoy-type structure with a closed bottom section and an upper section connected to the external sea area.

[0008] Furthermore, the foundation also includes a fan installation structure for installing a fan.

[0009] Furthermore, the main columns are respectively a cable compartment, an intermediate transition compartment and a ballast compartment connected to the external sea area from top to bottom;

[0010] The cable compartment is provided with a cable hole, through which the fan cable transmits power;

[0011] The intermediate transition tank is an empty tank, and the ballast tank is filled with ballast.

[0012] Furthermore, the mooring system of the main column includes a mooring anchor and a mooring cable, the upper end of the mooring cable is connected to the mooring system restraint device, and the lower end is connected to the seabed through the mooring anchor.

[0013] Furthermore, the diameter of the side column is smaller than the diameter of the main column.

[0014] Furthermore, the support rods and side columns adopt a hollow tube structure.

[0015] Furthermore, the interior of the side column is a fully open empty cabin;

[0016] Alternatively, a cross steel plate is welded inside the side column.

[0017] The second aspect of the utility model provides a wind turbine system which combines the advantages of Spar type and semi-submersible floating foundation structure forms, and at the same time has the advantages of small heave amplitude and small swing motion, and has strong adaptability to water depth.

[0018] In order to achieve the above object, the present invention adopts the following technical solution:

[0019] A fan system, comprising:

[0020] fans; and

[0021] As in the composite floating wind turbine foundation of the first aspect, the wind turbine is installed on the composite floating wind turbine foundation.

[0022] Furthermore, the wind turbine comprises a tower and a wind turbine assembly arranged on the tower, one end of the tower is fixed to the composite floating wind turbine foundation, and the other end of the wind turbine assembly is arranged on the other end of the tower.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] First, the composite floating wind turbine foundation includes a main column, side columns evenly arranged around the main column, and a mooring system. The main column and each side column are connected by a strut, and a number of damping plates are arranged along the outer surface of the side column; a mooring system restraint device is installed inside the main column, and the mooring system is connected to the mooring system restraint device. It has the advantages of both Spar and semi-submersible floating foundation structures, can effectively reduce the vertical movement and horizontal rotation of the floating foundation, and has strong adaptability to different water depths. The floating foundation has the advantages of simple structure, convenient processing, low steel consumption, and convenient transportation and installation, which is conducive to promoting the parity and commercialization of deep-sea floating wind turbines.

[0025] Second, the support rods and side columns are hollow tube structures without any compartments, and ready-made pipe fittings on the market can be directly used, which greatly reduces the construction cost. Most of the buoyancy is provided by the main column, and the support rods and side columns do not provide much buoyancy. The only function of the two is to set the damping plate far away from the main column, which can greatly reduce the sway amplitude and significantly increase the floating height of the entire wind turbine foundation, thereby improving the stability performance of the wind turbine foundation.

[0026] Third, in the main column compartments, the ballast tank at the bottom provides counterweight to lower the center of gravity of the entire floating wind turbine, and the transition tank is to make up for the insufficient buoyancy of the wind turbine foundation. These compartments have eliminated all unnecessary functions to minimize construction costs.

[0027] Fourth, the inside of the side column can be filled with a non-absorbent lightweight composite material, which can not only increase the anti-collision performance and keep the shape of the side column stable during a collision, but also avoid the loss of buoyancy caused by damage to the outer wall of the side column, which in turn causes the entire wind turbine to overturn. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0029] Figure 1 A schematic diagram of the composite floating wind turbine foundation structure provided by an embodiment of the utility model;

[0030] Figure 2 A schematic diagram of the main column structure provided by an embodiment of the utility model;

[0031] Figure 3 A cross-sectional view of a side column provided for an embodiment of the utility model;

[0032] Figure 4 A schematic diagram of the damping plate structure provided by an embodiment of the utility model;

[0033] Among them, 1. main column, 2. cross bar, 3. side column, 4. damping plate, 5. mooring cable system, 501. mooring cable, 502. mooring anchor, 6. wind turbine, 601. tower, 602. wind turbine assembly, 7. cable compartment, 8. transition compartment, 9. ballast tank, 10. cable hole, 11. outer wall of side column, 12. composite material, 13. cross steel plate of side column. DETAILED DESCRIPTION

[0034] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0035] It should be noted that the utility model is a construction scheme. As for the various equipment units involved therein, the specific structures for realizing the functions they should realize already exist in the prior art, and the protocols, software or programs involved in the work processing therebetween also already exist in the prior art. Those skilled in the art are fully aware that the utility model does not make any improvements to the units of each device, and therefore does not involve the content of the software, but relies on the organic integration of various components into a whole, that is, providing a construction scheme.

[0036] Example 1

[0037] like Figure 1 As shown, this embodiment provides a composite floating wind turbine foundation, including a main column 1, side columns 3 evenly arranged around the main column and a mooring system 5, wherein the main column 1 and each side column are connected by a strut 2, and a plurality of damping plates 4 are arranged along the outer surface of the side column 3; a mooring system restraint device is installed inside the main column, and the mooring system 5 is connected to the mooring system restraint device.

[0038] This composite foundation combines the advantages of Spar type and semi-submersible floating foundation structure, and has the advantages of small heave amplitude and small swing motion, and has strong adaptability to water depth. The surrounding side columns of the floating wind turbine foundation are equipped with damping plates, which can effectively reduce the heave motion of the floating foundation and improve the movement performance and force performance of the foundation. The floating wind turbine foundation has the advantages of simple structure, convenient processing, low steel consumption, and convenient transportation and installation. It has high cost-effectiveness and is conducive to promoting the parity process of deep-sea floating wind turbines.

[0039] like Figure 2 The main column structure schematic diagram is shown, the main column 1 is a buoy-type structure with a closed bottom section and an upper section connected to the external sea area. The main column 1 is composed of a cable compartment 7, an intermediate transition compartment 8, and a ballast compartment 9 connected to the external sea area from top to bottom;

[0040] The foundation also includes a fan installation structure for installing the fan.

[0041] The cable compartment 7 is provided with a cable hole 10, which is connected with the external environment through the cable hole 10, and seawater can enter the compartment. The fan cable above the foundation passes through the cable hole 10 for power transmission.

[0042] The intermediate transition tank 8 is an empty tank, and provides most of the buoyancy for the floating wind turbine foundation together with the ballast tank 9. The interior of the intermediate transition tank 8 can be a complete empty cabin, or can be divided into multiple empty cabins by bulkheads.

[0043] The ballast tank 9 can be filled with concrete, seawater, etc. as ballast to lower the center of gravity of the floating wind turbine foundation.

[0044] Among the compartments of the main column 1, the ballast tank 9 at the bottom provides counterweight to lower the center of gravity of the entire floating wind turbine, and the transition tank 8 is to make up for the insufficient buoyancy of the wind turbine foundation. These compartments have eliminated all unnecessary functions to minimize the construction cost.

[0045] It should be noted that the main building materials of the main column 1, the support rod 2 and the side column 3 are steel.

[0046] The side columns 3 are arranged with the main column 1 as the center, and the number and size of the side columns 3 are comprehensively determined according to factors such as the structural buoyancy and the height of the center of gravity.

[0047] The diameter of the side column 3 is smaller than that of the main column 1 , and the inside of the side column can be a fully empty cabin, or a cross steel plate 13 can be welded, but without any frame material, which can be selected according to actual working conditions.

[0048] like Figure 3 As shown, this is one of the working conditions shown, in which a cross steel plate 13 is welded inside the side column 3.

[0049] The inside of the side column 3 can be filled with a non-absorbent lightweight composite material 13, which can not only increase the anti-collision performance and keep the side column stable in shape during a collision, but also avoid the loss of buoyancy caused by damage to the outer wall 11 of the side column, which in turn causes the entire wind turbine to overturn.

[0050] For example, the non-absorbent lightweight composite material 12 is a composite foam material composed of hollow particles (such as hollow glass microspheres, composite hollow balls, etc.) and a polymer adhesive. Its microstructure is a porous material composed of many closed pores, which has many advantages such as low density, high strength, low water absorption, corrosion resistance and aging resistance, and is suitable for application fields such as deep-sea buoyancy materials.

[0051] Among them, the support rods 2 and side columns 3 adopt a hollow tube structure without any compartments. The support rods 2 and side columns 3 use larger diameter steel pipes without frame materials and compartments inside to improve construction convenience, shorten processing cycle, and reduce steel consumption.

[0052] The purpose of this setting is: most of the buoyancy is provided by the main column 1, and the support rod 2 and the side column 3 do not provide much buoyancy. The only function of the two is to set the damping plate 4 to a position farther away from the main column 1. This can greatly reduce the sway amplitude and significantly increase the floating height of the entire wind turbine foundation, thereby improving the stability performance of the wind turbine foundation.

[0053] Figure 1 A certain number of damping plates 4 are arranged along the outer surface of the side columns 3 to reduce the vertical swing movement and horizontal rotation of the floating wind turbine foundation and improve the movement stability of the foundation.

[0054] In this embodiment, the structure of the damping plate 4 is as follows: Figure 4 A steel plate is shown which is at a certain angle to the outer surface of the column.

[0055] It can be understood that the side columns 3 can be vertical or inclined.

[0056] The advantage of the above technical solution is that the composite foundation combines the advantages of both Spar and semi-submersible floating foundation structures, can effectively reduce the heave movement and horizontal rotation of the floating foundation, and has strong adaptability to different water depths. The floating foundation has the advantages of simple structure, convenient processing, low steel consumption, and convenient transportation and installation, which is conducive to promoting the parity and commercialization of deep-sea floating wind turbines.

[0057] Example 2

[0058] This embodiment provides a fan system, including:

[0059] fans; and

[0060] As in the composite floating wind turbine foundation described in Example 1, the wind turbine is installed on the composite floating wind turbine foundation.

[0061] Among them, Figure 1 As shown, the wind turbine 6 includes a tower 601 and a wind turbine assembly 602 arranged on the tower. One end of the tower 601 is fixed to the composite floating wind turbine foundation, and the wind turbine assembly 602 is arranged on the other end of the tower.

[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite floating wind turbine foundation, characterized in that: It includes a main column, side columns evenly arranged around the main column and a mooring system. The main column and the side columns are connected by struts, and a number of damping plates are arranged along the outer surfaces of the side columns. A mooring system restraint device is installed inside the main column, and the mooring system is connected to the mooring system restraint device.

2. A composite floating wind turbine foundation as claimed in claim 1, characterized in that: The main column is a buoy-type structure with a closed bottom section and an upper section connected to the external sea area.

3. A composite floating wind turbine foundation as claimed in claim 1, characterized in that: The foundation also includes a fan installation structure for installing the fan.

4. A composite floating wind turbine foundation as claimed in claim 3, characterized in that: The main columns are, from top to bottom, a cable compartment connected to the external sea area, an intermediate transition compartment, and a ballast compartment; The cable compartment is provided with a cable hole, through which the fan cable transmits power; The intermediate transition tank is an empty tank, and the ballast tank is filled with ballast.

5. The composite floating wind turbine foundation according to claim 1, characterized in that: The mooring system of the main column includes a mooring anchor and a mooring cable. The upper end of the mooring cable is connected to the mooring system restraint device, and the lower end is connected to the seabed through the mooring anchor.

6. The composite floating wind turbine foundation according to claim 1, characterized in that: The diameter of the side column is smaller than the diameter of the main column.

7. The composite floating wind turbine foundation according to claim 1, characterized in that: The support rods and side columns adopt hollow tube structures.

8. The composite floating wind turbine foundation according to claim 1, characterized in that: The interior of the side column is a fully open empty cabin; Alternatively, a cross steel plate is welded inside the side column.

9. A fan system, characterized in that: include: Fan; and The composite floating wind turbine foundation according to any one of claims 1 to 8, wherein the wind turbine is installed on the composite floating wind turbine foundation.

10. A fan system according to claim 9, characterized in that: The wind turbine comprises a tower and a wind turbine assembly arranged on the tower. One end of the tower is fixed to the composite floating wind turbine foundation, and the wind turbine assembly is arranged on the other end of the tower.

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