CN209938890U - Variable-cross-section three-floating-body offshore wind power foundation - Google Patents
Variable-cross-section three-floating-body offshore wind power foundation Download PDFInfo
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- CN209938890U CN209938890U CN201920516359.2U CN201920516359U CN209938890U CN 209938890 U CN209938890 U CN 209938890U CN 201920516359 U CN201920516359 U CN 201920516359U CN 209938890 U CN209938890 U CN 209938890U
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Abstract
The utility model relates to the field of offshore wind power development, in particular to a variable cross-section three-floating-body offshore wind power foundation, which comprises three variable cross-section cylindrical floating bodies which are arranged in a triangular manner, wherein the three variable cross-section cylindrical floating bodies have the same structure and are connected with a lower horizontal stay bar through an upper horizontal stay bar; each variable cross-section columnar floating body comprises an upper horizontal stay bar connecting section, a near water surface section, a lower horizontal stay bar connecting section and a ballast section from top to bottom, the diameters of the upper horizontal stay bar connecting section and the lower horizontal stay bar connecting section are both larger than the diameter of the near water surface section, the diameter of the ballast section is smaller than the diameter of the lower horizontal stay bar connecting section, a heave plate is arranged at the bottom of the ballast section, the diameter of the near water surface section of the floating body is smaller, and the wave external load acting on a foundation is effectively reduced; the wave motion response of the foundation is substantially reduced, and the operating efficiency and the service life of the wind driven generator are improved.
Description
Technical Field
The utility model relates to an offshore wind power development field especially relates to a three floating body formula offshore wind power foundations of variable cross-section type.
Background
The development of offshore wind power generation is an important supporting point of ocean economic strategy in China, and is also a main measure for solving the crisis of conventional energy and developing new energy. The wind resources in offshore and deep sea areas are very rich, and the method is a main battlefield for offshore wind power development in China in a future period. With the increase of the water depth of the development sea area, the fixed wind power foundation gradually loses superiority, and the floating wind power foundation becomes a second choice for the wind power development of offshore and deep sea areas.
The floating bodies of the currently used three-floating-body foundation are all cylindrical structures with equal cross sections, and the diameters of the floating bodies are about 10m for providing enough water displacement. Thus, such floating foundations typically have a large water surface and a large response to motion in the waves, which in turn affects and limits the efficiency and service life of the wind turbine. The technical difficulty of reducing the motion response of the floating foundation in waves has become a bottleneck in the development of wind power in offshore and deep sea areas.
Disclosure of Invention
To the problem that exists among the prior art, the utility model aims at: the variable-section three-floating-body offshore wind power foundation can substantially reduce the motion response of the floating foundation in waves, and improve the operation efficiency and the service life of a wind driven generator.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a variable cross-section type three-floater offshore wind power foundation comprises three variable cross-section type columnar floating bodies which are arranged in a triangular mode, wherein the three variable cross-section type columnar floating bodies are identical in structure and are connected with lower horizontal supporting rods through upper horizontal supporting rods; every variable cross-section type column body includes horizontal brace rod linkage segment, nearly surface of water section, horizontal brace rod linkage segment and ballast section down from top to bottom, and the diameter of going up horizontal brace rod linkage segment and horizontal brace rod linkage segment down all is greater than the diameter of nearly surface of water section, and ballast section diameter is less than the diameter of horizontal brace rod linkage segment down, and the bottom of ballast section is equipped with hangs down the swing board.
Furthermore, the diameters of the upper horizontal stay bar connecting section and the lower horizontal stay bar connecting section are the same, and the diameter of the ballast section is larger than that of the near-water surface section.
Furthermore, the upper horizontal stay bar connecting section, the near-water surface section, the lower horizontal stay bar connecting section and the ballast section of each variable cross-section columnar floating body are connected by adopting a circular truncated cone-shaped transition section.
Furthermore, the three variable cross-section columnar floating bodies are arranged in an equilateral triangle, an upper horizontal stay bar is arranged between any two upper horizontal stay bar connecting sections, and a lower horizontal stay bar is arranged between any two lower horizontal stay bar connecting sections.
Further, a ballast tank is arranged in the ballast section, and a solid ballast is filled in the ballast tank.
Further, the heave plate is a circular heave plate.
Furthermore, the diameter ratio of the diameter of the near water surface section to the diameter of the lower horizontal stay bar connecting section is 0.47-0.5, and the height ratio is 0.3-0.35.
Further, the ratio of the diameter of the ballast section to the diameter of the lower horizontal strut connecting section is 0.58-0.65, and the height ratio is 0.6-0.66.
Furthermore, the ratio of the diameter to the length of the upper horizontal stay bar to the diameter of the lower horizontal stay bar is 0.05-0.07.
In general, the utility model has the advantages of it is following:
(1) the variable-section three-floating-body offshore wind power foundation is low in overall gravity center and has high rolling and pitching rigidity;
(2) greater additional mass in the degrees of freedom of surge, sway and bow;
(3) greater radiation damping in heave, roll, pitch and yaw degrees of freedom;
(4) the diameter of the section of the floating body close to the water surface is smaller, so that the external wave load acting on the foundation is effectively reduced;
(5) the wave motion response of the foundation is substantially reduced, and the operating efficiency and the service life of the wind driven generator can be greatly improved.
Drawings
Fig. 1 is a schematic view of the overall three-dimensional structure of the variable cross-section three-floating offshore wind power foundation together with the tower and the wind turbine.
Fig. 2 is the utility model relates to a three floating body formula offshore wind power basis spatial structure schematic diagrams of variable cross-section type.
Fig. 3 is the utility model discloses a three floating body formula offshore wind power basis plane structure schematic diagrams of variable cross-section type.
Wherein, fig. 1, fig. 2 and fig. 3 include:
1-variable section type columnar floating body, 11-upper horizontal strut connecting section, 12-first transition section, 13-near water surface section, 14-second transition section, 15-lower horizontal strut connecting section, 16-third transition section, 17-ballast section;
2-heave plate;
3-upper horizontal stay bar, 4-lower horizontal stay bar;
5-the tower;
6-wind power generator.
Detailed Description
The following is a detailed description of the present invention:
as shown in fig. 1, 2 and 3, a variable cross-section three-floating-body offshore wind power foundation mainly comprises three same variable cross-section columnar floating bodies 1 arranged in an equilateral triangle, each variable cross-section columnar floating body 1 can be divided into an upper horizontal strut connecting section 11, a near-water surface section 13, a lower horizontal strut connecting section 15 and a ballast section 17 from top to bottom, an upper horizontal strut 3 is arranged between any two upper horizontal strut connecting sections 11, a lower horizontal strut 4 is arranged between any two lower horizontal strut connecting sections 15, the three variable cross-section columnar floating bodies 1 are fixedly connected together through the upper horizontal strut 3 and the lower horizontal strut 4, the diameters of the upper horizontal strut connecting sections 11 and the lower horizontal strut connecting sections 15 are the same, and the sizes of the upper horizontal strut 3 and the lower horizontal strut 4 are the same, so that the variable cross-section three-floating-body offshore wind power foundation is convenient to process and install; the tower 5 and the wind driven generator 6 are positioned at the geometric center of the foundation; the diameter of the upper horizontal stay bar connecting section 11 of each floating body is 8.5m, the height of each floating body is 2m, the ratio of the height of the upper horizontal stay bar connecting section 11 to the diameter of each floating body is smaller, so that the height of the part of the variable-section columnar floating body 1 above the water surface is lower, the stability is good, the diameter of the near-water-surface section 13 is 4m, the height of the near-water-surface section is 7m, and the lower horizontal stay bar connecting section is lower than theThe diameter of the brace connecting section 15 is 8.5m, the height is 23m, the diameter of the ballast section 17 is 5m, the height is 15m, the diameter of the ballast section 17 is smaller than that of the lower horizontal brace connecting section 15, so that the floating center of the variable-section columnar floating body 1 moves upwards as much as possible, and the filling density of the ballast tank in the ballast section 17 is 4.5-4.7 t/m3The solid ballast of (1) makes the center of gravity of the variable cross-section columnar floating body move downwards as far as possible to form a state that the floating center is higher than the center of gravity by a certain distance, thereby improving the anti-overturning capability of the whole foundation; a first transition section 12 with the height of 2m is arranged between the upper horizontal stay connecting section 11 and the near water surface section 13 of each floating body, a second transition section 14 with the height of 2m is arranged between the near water surface section 13 and the lower horizontal stay connecting section 15, and a third transition section 16 with the height of 4m is arranged between the lower horizontal stay connecting section 15 and the ballast section 17; the diameter of the first transition section 12 is gradually reduced from the upper horizontal strut connecting section 11 to the near water surface section 13, the diameter of the second transition section 14 is gradually increased from the near water surface section 13 to the lower horizontal strut connecting section 15, and the diameter of the third transition section 16 is gradually reduced from the lower horizontal strut connecting section 15 to the ballast section 17; ballast tanks are arranged in the ballast section 17 of each variable cross-section type columnar floating body 1 and are used for filling solid ballast, so that the center of gravity of the foundation can be effectively reduced, the foundation has sufficient initial stability, and the rolling and pitching rigidity of the foundation is improved. In addition, the bottom of each variable cross-section type columnar floating body 1, namely the bottom of the ballast section 17 is provided with the circular heave plate 2, so that the heave performance of the foundation is improved.
As shown in fig. 2, three identical variable cross-section columnar floating bodies 1 are arranged in an equilateral triangle, and are symmetrically arranged and have good stability. The diameter of each floating body near-water surface section 13 is only 4m, and compared with a large-diameter floating body foundation in the prior art, the impact effect of the external load of waves on the foundation can be greatly reduced, and the improvement of the motion response of the foundation in stormy waves is facilitated.
The utility model relates to a three floating body formula offshore wind power basis of variable cross-section type its advantage can outline as follows:
(1) the floating center of the variable-section three-floating-body offshore wind power foundation is higher than the gravity center, so that the variable-section three-floating-body offshore wind power foundation has enough initial stability and high rolling and pitching rigidity; and, have greater additional mass in surging, swaying and yawing freedom, have greater radiation damping in the surging, swaying, surging and yawing freedom;
(2) the diameter of the section of the floating body close to the water surface is smaller, so that the external wave load acting on the foundation is effectively reduced;
(3) the wave motion response of the foundation is reduced substantially, the amplitude of the heave, roll, pitch and yaw motion of the foundation is reduced, and the operation of the upper wind driven generator is facilitated. The method has practical significance for improving the working efficiency of the fan, reducing the influence of environmental load on the fan, prolonging the service life of the fan and the like.
(4) The variable-section three-floating-body offshore wind power foundation has great applicability by combining the characteristic that the wind waves in offshore and deep sea areas (especially in south sea areas) of China are generally great.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (9)
1. A variable cross-section type three-floating-body offshore wind power foundation is characterized in that: the device comprises three variable cross-section columnar floating bodies which are arranged in a triangular manner, wherein the three variable cross-section columnar floating bodies have the same structure and are connected with each other through an upper horizontal stay bar and a lower horizontal stay bar; every variable cross-section type column body includes horizontal brace rod linkage segment, nearly surface of water section, horizontal brace rod linkage segment and ballast section down from top to bottom, and the diameter of going up horizontal brace rod linkage segment and horizontal brace rod linkage segment down all is greater than the diameter of nearly surface of water section, and ballast section diameter is less than the diameter of horizontal brace rod linkage segment down, and the bottom of ballast section is equipped with hangs down the swing board.
2. The variable cross-section type three-floating-body offshore wind power foundation of claim 1, wherein: the diameters of the upper horizontal stay bar connecting section and the lower horizontal stay bar connecting section are the same, and the diameter of the ballast section is larger than that of the near-water surface section.
3. The variable cross-section type three-floating-body offshore wind power foundation of claim 2, wherein: the upper horizontal stay bar connecting section, the near-water surface section, the lower horizontal stay bar connecting section and the ballast section of each variable cross-section columnar floating body are connected by adopting a circular truncated cone transition section.
4. The variable cross-section type three-floating-body offshore wind power foundation of claim 1, wherein: the three variable cross-section columnar floating bodies are arranged in an equilateral triangle, an upper horizontal support rod is arranged between any two upper horizontal support rod connecting sections, and a lower horizontal support rod is arranged between any two lower horizontal support rod connecting sections.
5. The variable cross-section type three-floating-body offshore wind power foundation of claim 1, wherein: the ballast section is internally provided with a ballast tank, and the ballast tank is filled with solid ballast.
6. The variable cross-section type three-floating-body offshore wind power foundation of claim 1, wherein: the heave plate is a circular heave plate.
7. The variable cross-section type three-floating-body offshore wind power foundation of claim 1, wherein: the ratio of the diameter of the near water surface section to the diameter of the lower horizontal stay bar connecting section is 0.47-0.5, and the height ratio is 0.3-0.35.
8. The variable cross-section type three-floating-body offshore wind power foundation of claim 1, wherein: the ratio of the diameter of the ballast section to the diameter of the lower horizontal strut connecting section is 0.58-0.65, and the height ratio is 0.6-0.66.
9. The variable cross-section type three-floating-body offshore wind power foundation of claim 1, wherein: the diameter-to-length ratio of the upper horizontal brace rod to the lower horizontal brace rod is 0.05-0.07.
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| CN201920516359.2U CN209938890U (en) | 2019-04-17 | 2019-04-17 | Variable-cross-section three-floating-body offshore wind power foundation |
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| CN201920516359.2U CN209938890U (en) | 2019-04-17 | 2019-04-17 | Variable-cross-section three-floating-body offshore wind power foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001877A (en) * | 2019-04-17 | 2019-07-12 | 华南理工大学 | A kind of three float type offshore wind power foundation of variable cross-section type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001877A (en) * | 2019-04-17 | 2019-07-12 | 华南理工大学 | A kind of three float type offshore wind power foundation of variable cross-section type |
| CN110001877B (en) * | 2019-04-17 | 2024-07-05 | 华南理工大学 | Variable cross-section type three-floating offshore wind power foundation |
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