阅读说明：本技术 一种直立柱漂浮式风机基础及风力发电机组 (Vertical column floating type fan foundation and wind generating set ) 是由 周昳鸣 郭小江 闫姝 穆延非 郑枫 李华 周国栋 索中举 刁新忠 陆界屹 陈晓路 于 2020-12-30 设计创作，主要内容包括：本发明公开一种直立柱漂浮式风机基础及风力发电机组,立柱漂浮式风机基础包括系泊系统、基础结构以及设置在海底的锚固基础,系泊系统将基础结构固定在海底的锚固基础上,基础结构包括等截面直立柱和变截面直立柱,等截面直立柱下端连接变截面直立柱上端,变截面直立柱的截面从上到下逐渐增大,变截面直立柱的下部设置减摇水舱；减摇水舱沿周向分为若干分舱,分舱的顶部和底部分别通过管道连通；基础结构的上部结构较细小,下部结构较粗大,用于降低整个结构重心,减少吃水深度,使结构整体重心下移,增大阻尼系数,减小固有频率,增加了基础平台稳性；并且减少了吃水深度,从而扩大了该基础平台结构的适用范围。(The invention discloses an upright post floating type fan foundation and a wind generating set, wherein the upright post floating type fan foundation comprises a mooring system, a foundation structure and an anchoring foundation arranged on the sea bottom, the mooring system fixes the foundation structure on the anchoring foundation on the sea bottom, the foundation structure comprises an equal-section upright post and a variable-section upright post, the lower end of the equal-section upright post is connected with the upper end of the variable-section upright post, the section of the variable-section upright post is gradually increased from top to bottom, and a sway reduction cabin is arranged at the lower part of the variable-section upright post; the anti-rolling water tank is divided into a plurality of sub-tanks along the circumferential direction, and the tops and the bottoms of the sub-tanks are respectively communicated through pipelines; the upper structure of the foundation structure is smaller, and the lower structure is thicker, so that the gravity center of the whole structure is reduced, the draft depth is reduced, the whole gravity center of the structure is moved downwards, the damping coefficient is increased, the natural frequency is reduced, and the stability of a foundation platform is improved; and the draught depth is reduced, so that the application range of the foundation platform structure is expanded.)

1. The vertical column floating type fan foundation structure is characterized by comprising a mooring system (4), a foundation structure (3) and an anchoring foundation arranged on the sea bottom, wherein the mooring system (4) fixes the foundation structure (3) on the anchoring foundation on the sea bottom, the foundation structure (3) comprises a uniform-section vertical column (31) and a variable-section vertical column (32), the lower end of the uniform-section vertical column (31) is connected with the upper end of the variable-section vertical column (32), the section of the variable-section vertical column (32) is gradually increased from top to bottom, and a sway reduction cabin (5) is arranged at the lower part of the variable-section vertical column (32); the anti-rolling water tank (5) is divided into a plurality of sub-tanks along the circumferential direction, and the tops and the bottoms of the sub-tanks are respectively communicated through pipelines; the anti-rolling tank (5) is provided with at least one layer.

2. The upright post floating type wind turbine foundation structure according to claim 1, wherein the anti-rolling water tank (5) comprises an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder form an annular space, a partition plate is arranged in the annular space to divide the annular space into a plurality of sub-tanks in equal parts, and the sub-tanks symmetrical about the longitudinal central plane of the anti-rolling water tank (5) are communicated through pipelines.

3. The upright column floating wind turbine foundation structure according to claim 1, wherein a sensor for monitoring flow rate is provided on the pipeline, and a water level monitoring sensor is provided in the anti-rolling tank (5).

4. The upright post floating wind turbine foundation structure according to claim 1, wherein the anti-rolling tanks (5) are provided in three layers, each layer of anti-rolling tanks (5) being independent from each other.

5. The upright post floating type fan foundation structure according to claim 1, wherein the number of the sub-compartments is even, the upper parts of two opposite sub-compartments in the sub-compartments are communicated through an upper communicating pipe, and the lower parts of two opposite sub-compartments in the sub-compartments are communicated through a lower communicating pipe.

6. An upright post floating wind turbine foundation structure according to claim 1, wherein the anti-roll tank (5) is provided with at least four sub-tanks.

7. The upright post floating fan foundation structure as claimed in claim 1, wherein the foundation structure (3) is assembled by axially welding steel cylinder segments, and the steel cylinder segments are rolled by steel plates.

8. The upright floating wind turbine foundation structure according to claim 1, wherein the junction of the equal section upright (31) and the variable section upright (32) is smoothly transitioned.

9. Upright column floating wind turbine foundation structure according to claim 1, wherein the mooring system (4) and the surface of the foundation structure (3) are provided with a corrosion resistant coating.

10. An upright column floating type wind generating set is characterized by comprising a fan (1), a tower frame (2) and a foundation, wherein the fan (1) is arranged at the top end of the tower frame (2), the tower frame (2) is arranged on the foundation, and the foundation adopts the upright column floating type fan foundation as claimed in claim 1; the top end face of the foundation structure (3) is not smaller than the diameter of the bottom end face of the tower (2).

Technical Field

The invention belongs to the technical field of design of a floating type foundation for wind power generation, and particularly relates to a vertical column floating type fan foundation and a wind generating set.

Background

With the continuous expansion of the development of wind energy resources, especially the development in deep sea, the research on the floating wind turbine is paid more attention. The common floating foundations include upright column foundations, tension leg foundations, semi-submersible foundations and the like. Coastal water depth is shallow, the water depth applicability of the platform and the manufacturing cost of a mooring structure are considered, and the vertical column fan foundation is widely concerned due to the advantages of simple structure, good stability and the like.

As shown in fig. 1, the conventional vertical column floating wind turbine is suitable for deep sea with water depth of 80m, and mainly comprises four parts, namely a wind turbine (1), a tower (2), a foundation structure (3) and a mooring system (4). However, the vertical column floating type wind turbine foundation needs to consider wind load, wave load, hydrodynamic load and mooring load at the same time, so that the requirement on stability is higher, and the required draft is larger. Because the offshore distance in China is within 100km in the sea area, the requirement of the vertical column floating type wind turbine foundation on the water depth (generally, the water depth is more than 80m) can not be met, and the offshore distance in China is not researched by extensive scholars in China. The conventional upright column floating type fan foundation has high requirement on the applicable water depth, and is not wide in the applicability in the current China coastal sea area.

In addition, for the vertical column floating type wind turbine foundation structure, since the dynamic characteristics thereof are similar to those of a ship, it can be considered to use the anti-rolling tanks to increase the stability of the foundation structure.

Disadvantages of the anti-roll tank include: only when the anti-rolling water tank reaches a certain volume, the anti-rolling water tank can generate enough rolling restoring moment, and the anti-rolling water tank can play a certain effect; in addition, the self-oscillation frequency of the anti-rolling tank must be higher than that of the floating foundation platform to realize rolling and anti-rolling, otherwise, the anti-rolling tank can even generate an effect of increasing rolling.

In summary, in order to solve the applicable water depth range of the vertical column floating type wind turbine foundation structure and increase the stability of the vertical column floating type foundation, the structure of the conventional vertical column floating type wind turbine foundation needs to be optimized.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the vertical column floating type fan foundation and the wind generating set, the anti-rolling water tank is arranged, the center of the structure is reduced, and the draught depth is reduced, so that the vertical column floating type fan foundation can be suitable for sea areas with the water depth of more than 50 m.

In order to achieve the purpose, the invention adopts the technical scheme that: the foundation structure comprises a uniform-section upright column and a variable-section upright column, the lower end of the uniform-section upright column is connected with the upper end of the variable-section upright column, the section of the variable-section upright column is gradually increased from top to bottom, and a sway reduction cabin is arranged at the lower part of the variable-section upright column; the anti-rolling water tank is divided into a plurality of sub-tanks along the circumferential direction, the tops and the bottoms of the sub-tanks are respectively communicated through pipelines, and at least one layer of anti-rolling water tank is arranged.

The anti-rolling water tank comprises an inner cylinder and an outer cylinder, an annular space is formed by the inner cylinder and the outer cylinder, a partition plate is arranged in the annular space to divide the annular space into a plurality of sub-tanks in equal parts, and the sub-tanks which are symmetrical about the longitudinal central plane of the anti-rolling water tank are communicated through pipelines.

The pipeline is provided with a sensor for monitoring flow, and the anti-rolling water tank is internally provided with a water level monitoring sensor.

The anti-rolling tank is provided with three layers, and each layer of anti-rolling tank is independent.

The number of the sub-compartments is even, the upper parts of two opposite sub-compartments in the sub-compartments are communicated through an upper communicating pipe, and the lower parts of two opposite sub-compartments in the sub-compartments are communicated through a lower communicating pipe.

The anti-rolling tank is provided with at least four sub-tanks.

The foundation structure is formed by welding and splicing steel cylinder segments along the axial direction, and the steel cylinder segments are rolled by steel plates.

The connection part of the upright post with the uniform cross section and the upright post with the variable cross section is in smooth transition.

The surfaces of the mooring system and the foundation structure are provided with corrosion resistant coatings.

A vertical column floating type wind generating set comprises a fan, a tower frame and a foundation, wherein the fan is arranged at the top end of the tower frame, the tower frame is arranged on the foundation, and the foundation adopts the vertical column floating type fan foundation; the top end face of the foundation structure is not smaller than the diameter of the bottom end face of the tower.

Compared with the prior art, the invention has at least the following beneficial effects:

the upper structure of the foundation structure is smaller, and the lower structure is thicker, so that the gravity center of the whole structure is reduced, the draft depth is reduced, the whole gravity center of the structure is moved downwards, the damping coefficient is increased, the natural frequency is reduced, and the stability of a foundation platform is improved; the foundation platform structure has good anti-rolling effect in the harmonic frequency range, and reduces the draught depth, thereby expanding the application range of the foundation platform structure.

Drawings

The above and other features and advantages of the present invention will become more apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

FIG. 1 is a schematic view of a conventional upright column floating fan system.

FIG. 2 is a schematic diagram of an upright column floating fan system that can be implemented in accordance with the present invention.

Fig. 3 is a schematic diagram of a foundation structure of a floating type fan vertical column using a rolling reduction tank.

Fig. 4 is a schematic view of a roll tank structure of the present invention.

FIG. 5 is a schematic front view of a roll tank embodying the present invention.

In the attached drawings, 1-a fan, 2-a tower, 3-a foundation structure, 4-a mooring system, 5-a rolling reduction water tank, 6-a communication pipe, 31-an equal-section upright column, 32-a variable-section upright column, 61-a first upper communication pipe, 62-a second upper communication pipe, 63-a first lower communication pipe and 64-a second lower communication pipe.

Detailed Description

The present invention is described in detail below with reference to the attached drawing figures, in which exemplary embodiments of the invention are shown.

The invention provides a vertical column floating type fan foundation structure which comprises a mooring system 4, a foundation structure 3 and an anchoring foundation arranged on the sea bottom, wherein the mooring system 4 fixes the foundation structure 3 on the anchoring foundation on the sea bottom, the foundation structure 3 comprises a uniform-section vertical column 31 and a variable-section vertical column 32, the lower end of the uniform-section vertical column 31 is connected with the upper end of the variable-section vertical column 32, the section of the variable-section vertical column 32 is gradually increased from top to bottom, and a sway reduction cabin 5 is arranged at the lower part of the variable-section vertical column 32; the anti-rolling tank 5 is divided into a plurality of sub-tanks along the circumferential direction, and the tops and the bottoms of the sub-tanks are respectively communicated through pipelines.

The anti-rolling tank 5 comprises an inner cylinder and an outer cylinder, an annular space is formed by the inner cylinder and the outer cylinder, a partition plate is arranged in the annular space to divide the annular space into a plurality of sub-tanks, and the sub-tanks which are symmetrical about the longitudinal central plane of the anti-rolling tank 5 are communicated through pipelines.

The anti-rolling tank 5 is provided with at least one layer, and when the anti-rolling tank 5 is provided with a plurality of layers, the anti-rolling tanks 5 on each layer are mutually independent.

The anti-rolling tank 5 is provided with three layers.

The number of the sub-compartments is even, the upper parts of two opposite sub-compartments in the sub-compartments are communicated through an upper communicating pipe, and the lower parts of two opposite sub-compartments in the sub-compartments are communicated through a lower communicating pipe.

The anti-rolling tank 5 is provided with at least four sub-tanks.

The foundation structure 3 is formed by welding and splicing steel cylinder segments along the axial direction, and the steel cylinder segments are rolled by steel plates.

The junction of the uniform-section upright post 31 and the variable-section upright post 32 is in smooth transition.

The surfaces of the mooring system 4 and the foundation structure 3 are provided with a corrosion resistant coating.

As an embodiment of the invention, an upright column floating type wind generating set comprises a fan 1, a tower frame 2 and a foundation, wherein the fan 1 is arranged at the top end of the tower frame 2, the tower frame 2 is arranged on the foundation, and the foundation adopts the upright column floating type fan foundation; the top end face of the foundation structure 3 is not smaller than the diameter of the bottom end face of the tower 2.

The invention provides a vertical column floating type fan foundation adopting a U-shaped anti-rolling water tank, which is used for a sea area with water depth of only more than 50m and is characterized by comprising the following components in percentage by weight as shown in figure 2: a wind turbine 1 and a tower 2 are arranged in a deep sea area, and a foundation structure 3 is fixed on a pile foundation on the sea bottom through a mooring system 4. The invention divides the traditional equal-section upright post structure into two parts, namely an equal-section upright post 31 and a variable-section upright post 32.

Referring to fig. 2, in the foundation structure 3 of the vertical column floating type wind turbine foundation adopting the U-shaped anti-rolling tank, the upper section AA ' and the lower section BB ' of the vertical column 31 with the uniform cross section are equal, the upper section BB ' of the vertical column 32 with the variable cross section is equal to the lower section of the vertical column 31 with the uniform cross section, and the lower section CC ' is obviously larger than the upper section BB ', and the whole structure is in a horn shape with a downward opening.

Referring to fig. 3, foundation structure 3's bottom has set up the tank 5 that subtracts who a plurality of subdivision, set up the inner tube in the tank 5 that subtracts, form annular space between inner tube and the urceolus, set up the baffle in the annular space and divide its equalling into the quartering, link to each other through communicating pipe 6 between the subdivision, it is concrete, wherein relative subdivision upper portion is respectively through first communicating pipe 61 and second communicating pipe 62 on going up, divide the tank upper portion of 5 vertical central planes symmetry about subtracting the tank to communicate through first communicating pipe 63 and second communicating pipe 64 respectively, it can both be effective to realize subtracting the tank when not equidirectional shaking. The heights of the first upper communication pipe 61, the second upper communication pipe 62, the first lower communication pipe 63, and the second lower communication pipe 64 are h, respectively₁,h₂,h₃,h₄After the geometric dimension of the anti-rolling water tank is determined, the anti-rolling effect mainly depends on the arrangement of the vertical position, the selection of parameters such as the side tank liquid level height and the damping coefficient; h is₁,h₂,h₃,h₄And the water surface height is designed according to site environmental conditions, fan model size, basic platform size, ballast weight and basic platform stability index requirements of specific projects.

According to the vertical column floating type fan foundation adopting the U-shaped anti-rolling water tank, the upper structure of the foundation structure 3 is fine, and the lower structure is coarse, so that the gravity center of the whole structure is reduced, and the draught depth is reduced. The floating type fan foundation structure is not limited to a horn shape with a downward opening, but also comprises other structural forms of small top and big bottom; the anti-rolling tank is not limited to the structure form that the upper communicating pipe and the lower communicating pipe are connected, but also comprises the structure form that the upper communicating pipe and the lower communicating pipe are connected through a tank type.

According to the vertical column floating type fan foundation adopting the U-shaped anti-rolling water tank, the center of gravity of the whole structure can be moved downwards, the damping coefficient is increased, the natural frequency is reduced, and the stability of a foundation platform is improved; and the draught depth is reduced, so that the application range of the foundation platform structure is expanded.

Fig. 2 shows a novel vertical column floating type fan system provided by the invention, which comprises a fan 1 and a tower 2, wherein the fan 1 is arranged at the top end of the tower 2, the tower 2 is arranged on a foundation structure 3, and the foundation structure 3 is fixed on a pile foundation on the seabed through a mooring system 4.

Fig. 3 is a vertical column floating type fan foundation adopting a U-shaped anti-rolling tank, which divides a conventional equal-section vertical column structure into two parts, wherein an equal-section vertical column 31 and a variable-section vertical column 32 are provided, an upper section AA ' and a lower section BB ' of the equal-section vertical column 31 are equal, an upper section BB ' of the variable-section vertical column 32 is equal to a lower section of the equal-section vertical column 31, and the lower section CC ' is significantly larger than the upper section BB ', and the whole is in a horn shape with a downward opening.

Fig. 4 and 5 show a structure view and a front view of a U-shaped anti-roll tank, respectively, and the size of the foundation structure 3 is as follows: OO ═ 50m, OO ═ 20m, O ' O ═ D ═ 30m, D ═ 6m, BC and B ' C ' are connected through a straight line, AB is connected with BC, A ' B ' is connected with B ' C ' by chamfering, the chamfering radius is 5m, AA ═ BB ═ 7m, CC ═ 50m, and the height of the anti-rolling tank is higher than that of the anti-rolling tankh is 4m, and 3 layers of anti-rolling water tanks are arranged, h₁＝2.5m，h₂＝2.4m，h₃＝0.5m，h₄＝0.4m。

The foundation structure 3 is rolled into a cylinder by a steel plate with the height of 2.0m-3.0m, and is connected into a vertical column floating foundation by girth welding.

The upper section AA ' of foundation structure 3 is the same or slightly larger diameter than the bottom of tower 2, and the lower section CC ' of foundation structure 3 has a significantly larger diameter than the upper sections AA ', A, B and C, with increasing diameters.

The foundation structure 3 is connected to the seabed anchoring foundation by means of a mooring structure 4, preventing its movement.

The above embodiments and parameters are selected as preferred examples of the present invention, and are not intended to limit the scope of the present invention.