CN112373640A - Offshore floating wind power platform - Google Patents
Offshore floating wind power platform Download PDFInfo
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- CN112373640A CN112373640A CN202011336258.0A CN202011336258A CN112373640A CN 112373640 A CN112373640 A CN 112373640A CN 202011336258 A CN202011336258 A CN 202011336258A CN 112373640 A CN112373640 A CN 112373640A
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- wind power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
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- Ocean & Marine Engineering (AREA)
- Wind Motors (AREA)
Abstract
The bottom of a tower cylinder penetrates through a floating platform floating on the sea surface to extend into the sea and is provided with a spherical damping body, and the top of the tower cylinder is provided with a fan unit; the upper half part of the damping body is hollow and provided with a water through hole, and the lower half part is poured with a balancing weight by concrete. The offshore floating wind power platform has excellent stability, small influence degree by wind and waves, high structural strength, stable work and high applicability, and can meet the requirements of various specifications of fan units, particularly the installation requirements of large fan units and the large-scale development requirements of wind power equipment.
Description
Technical Field
The invention relates to wind power equipment, in particular to a floating wind power platform used on the sea.
Background
Offshore floating wind power is a device which floats on the sea surface and generates power by wind power, the offshore floating wind power device needs to be provided with a floating platform which can float at a fixed position on the sea surface, the existing floating platforms are mainly divided into a SEMI-submersible platform (SEMI), a single-column platform (SPAR) and a Tension Leg Platform (TLP), and then a tower barrel, a fan set and other devices are arranged on the floating platforms.
The single-column platform and the tension leg platform are drilling platforms, and the manufacturing cost is high, so that the floating wind power generation mostly adopts a semi-submersible platform. The semi-submersible platform consists of a plurality of floating bodies, the floating bodies are connected through a connecting structure, the semi-submersible platform has good stability, and the restoring moment is large when the semi-submersible platform is transversely inclined. On the other hand, each floating body of the semi-submersible platform generates periodic reciprocating motion due to the disturbance of waves, the wave load on the floating bodies is huge, and the connecting structure between the floating bodies needs to bear the coupling action of a large bending moment and a large torque, so that large structural stress is generated, and the semi-submersible platform is easy to damage due to fatigue. Therefore, the semi-submersible platform is only suitable for mounting small and medium-sized fan sets, and the nonlinear rapid increase of cost when the semi-submersible platform is applied to large-sized fan sets greatly limits the large-scale setting of the fan sets, so that the power generation cost cannot be reduced through a scale effect.
Disclosure of Invention
The invention aims to provide an offshore floating type wind power platform which is simple in structure and suitable for the installation requirement of a large-scale fan unit, so as to meet the requirements of large-scale arrangement of the fan unit and large-scale development of wind power equipment.
The offshore floating wind power platform comprises a floating platform floating on the sea surface and a damping body located below the floating platform, wherein the floating platform is fixedly connected with the damping body through a connecting column, and a mooring chain is connected between the damping body and a positioning anchor fixed on the seabed; the upper part of the damping body is hollow and is provided with a water through hole communicated with the outside, and a balancing weight is arranged in the lower part of the damping body.
According to the offshore floating wind power platform, devices such as a tower cylinder and a fan unit are installed on a floatable floating platform, a damping body is connected to the lower portion of the floating platform through a connecting column, the damping body is located below the sea surface, seawater is filled into a hollow cavity in the upper portion of the damping body through a water inlet formed in the damping body, and a balancing weight with larger weight is arranged on the lower portion of the damping body, so that the center of gravity of the damping body is located below the center. The gravity center of the whole offshore floating wind power equipment can be lowered by arranging the damping body; when the floating platform is influenced by wind waves and swings, the damping bodies below the floating platform incline at the same time, so that torque required for restoring the floating platform is provided; in addition, the damping body can interact with the seawater inside and outside in the swinging process, so that the damping body can generate a damping effect on the floating platform, the swinging of the floating platform is reduced, and the floating platform is quickly and stably recovered. Therefore, the offshore floating wind power platform has excellent stability, small influence degree by wind and waves, high structural strength, stable work and high applicability, and can meet the requirements of fan units of various specifications, particularly the installation requirements of large fan units and the large-scale development requirements of wind power equipment; in addition, the upper part of the damping body can provide a perching and sheltering place for marine organisms in the use process of the wind power platform, and all the damping bodies can be stacked on the coastal seabed in a centralized manner even if the wind power platform or the damping bodies reach the life cycle and are scrapped, so that an artificial reef group is constructed by means of gaps among the damping bodies and in the damping bodies, an ecological-friendly resource utilization mode is formed, and the coastal marine organism resource protection and fishery resource sustainable development are promoted.
Drawings
Fig. 1 is a schematic structural diagram of an offshore floating wind power platform.
Fig. 2 is a partial schematic structural view of the offshore floating wind power platform shown in fig. 1.
Fig. 3 is a schematic diagram of the distribution structure of the buoyancy body and the buoyancy cabin body at the bottom of the buoyancy body.
Fig. 4 is a schematic view of the structure of the grooves on the damping body.
Fig. 5 is a schematic view of the structure of the coupling ring on the damping body.
Detailed Description
An offshore floating wind power platform comprises a floating platform 1 floating on the sea surface and a damping body 2 positioned below the floating platform, wherein the floating platform and the damping body are fixedly connected through a connecting column 3, and a mooring chain 4 is connected between the damping body and a positioning anchor 20 fixed on the seabed; the upper part of the damping body is hollow and is provided with a water through hole communicated with the outside, and a balancing weight 5 is arranged in the lower part of the damping body.
Offshore floating wind power platform, floating platform 1 includes floatable buoyancy body 11 and a plurality of buoyancy module body 12, buoyancy body 11 is cylindric, the vertical cross-sectional shape of buoyancy module body 12 is triangle-shaped, the buoyancy module body is fixed to be set up between buoyancy body bottom surface and 3 outer walls of spliced pole, and all buoyancy module bodies are along buoyancy body bottom surface circumference evenly distributed. The buoyancy body floats on the sea surface, and triangular buoyancy bodies are arranged under the buoyancy body along the vertical direction, and the buoyancy bodies mainly play a role of providing buoyancy for the whole system.
Offshore floating wind power platform, damping body 2 is globular, and 2 internal cavity of epispheres and be provided with balancing weight 5 in the lower hemisphere of damping body, the damping body of this shape can improve damping effect and stability. In addition, an annular groove 21 is formed in the middle of the damping body 2, the two arc-shaped connecting rings 6 are arranged in the groove, two end parts of the two connecting rings can be detachably connected and fixed respectively, the connecting rings are also provided with lug plates 7, and one end of the mooring chain 4 is connected to the lug plates; the connecting ring is generally made of steel, the steel used in ocean engineering needs to be docked for cutting and reinstalling a new connecting ring after seawater corrosion, and the connecting ring with the structure is convenient to assemble and disassemble while meeting the connecting work of the mooring chain. In addition, the balancing weight 5 is made of concrete in a pouring mode, the manufacturing is simple, the cost is low, the service life can reach 120 years, and the depreciation cost is greatly reduced.
According to the offshore floating wind power platform, the middle part of the connecting column 3 penetrates through the floating platform 1, the bottom of the connecting column is connected with the damping body 2, the top of the connecting column upwards extends to form a tower cylinder and is provided with the fan unit 8 for power generation, and the offshore floating wind power platform with the structure has higher structural stability and stationarity.
In the offshore floating wind power platform, a positioning anchor 20 is connected with a buoy cable 9, and the other end of the buoy cable is provided with an anchor buoy 10 floating on the sea surface. When the anchor is arranged on the offshore floating wind power platform, the anchor is lifted to the seabed; and when the anchor is lifted, the position of the positioning anchor can be found according to the anchor buoy so as to facilitate the anchor lifting operation.
As shown in fig. 1-5, the floating platform floats at sea level P, the bottom of the tower tube passes through the floating platform and is connected with the damping body, and the top is provided with a fan unit; the damping body under the water surface is spherical, seawater is poured into the hollow cavity at the upper part of the damping body through the water inlet, and the lower part of the damping body is poured into a balancing weight by concrete; the buoyancy body is in a steel cylinder shape, so that buoyancy and restoring moment can be improved, the buoyancy body at the bottom of the buoyancy body is in a triangular shape, for example, 25mx18mx5.4m, a single buoyancy body can provide 1245t buoyancy, and six buoyancy bodies can provide 7470t buoyancy; when the wind power platform is subjected to the tilting moment, the rotation center of the wind power platform is positioned at the intersection point (namely 'floating center') of the sea level (water plane) and the center line of the wind power platform, but not at the position of the center of gravity, so that the buoyancy can be always kept at a constant value, and the mechanical balance is met.
Assuming that the buoyancy body is a cylinder with the radius of 29m and the thickness of 7.5m, when the 2-degree transverse inclination occurs, the displacement volume change of the left side and the right side of the vertical center line is about 645m3, the restoring moment arm is about 29m, and the restoring moment is about 19000t m; in addition to the restoring moment generated by the buoyancy body, the counterweight positioned under the water also generates the restoring moment, and if the counterweight subtracts the buoyancy value of the sea to be 2000t, the restoring moment arm is about tan2 × 58m =2m, and the restoring moment is 4000t × m; when the underwater closed part of the tower with the diameter of 8m tilts, a moment opposite to the restoring moment is generated, the water displacement of the tower is 1650t, the moment arm is about tan2 × 16m =0.56m, and the moment is about-924 t × m; when the floating cabin body tilts transversely, the moment opposite to the restoring moment is generated, the water discharge amount of the floating cabin body is about 7470t, the moment arm is about tan2 × 7m =0.24m, and the moment is about-1800 t × m; when the fan is transversely inclined, the weight of a fan cabin is 500t, the moment arm is about 5m, the moment is about-2500 t m, the weight of the tower above a waterline is about 1200t, the moment arm is about 2.5m, and the moment is about-3000 t m; that is, when the offshore floating wind power platform generates a 2 ° list, its restoring moment is 14776t × m. The restoring moment is large enough to ensure that the offshore floating wind power platform is a steady system; in addition, the cross-sectional area of the water surface drainage structure of the offshore floating wind power platform is small, and the offshore floating wind power platform is similar to a small water surface ship, so that the advantages of small water surface can be fully utilized, and the wave load can be reduced to the maximum extent.
Claims (9)
1. The utility model provides an offshore floating wind power platform, includes floating platform (1) of cursory in the sea, its characterized in that: a damping body (2) is arranged below the floating platform, the floating platform is fixedly connected with the damping body through a connecting column (3), and a mooring chain (4) is connected between the damping body and a positioning anchor (20) fixed on the seabed; the upper part of the damping body is hollow and is provided with a water through hole communicated with the outside, and a balancing weight (5) is arranged in the lower part of the damping body.
2. The offshore floating wind power platform of claim 1, wherein: the floating platform (1) comprises a floatable buoyancy body (11) and a plurality of buoyancy bodies (12), the buoyancy bodies are fixedly arranged between the buoyancy body bottom surface and the outer wall of the connecting column (3), and all the buoyancy bodies are circumferentially and uniformly distributed along the buoyancy body bottom surface.
3. The offshore floating wind power platform of claim 2, wherein: the buoyancy body (11) is cylindrical, and the vertical section of the buoyancy body (12) is triangular.
4. The offshore floating wind power platform of claim 1, wherein: the damping body (2) is spherical.
5. The offshore floating wind power platform of claim 4, wherein: the upper hemisphere of the damping body (2) is hollow, and the lower hemisphere is internally provided with a balancing weight (5).
6. The offshore floating wind power platform of claim 1 or 4, wherein: the damping body (2) is provided with an annular groove (21) along the middle part, the two arc-shaped connecting rings (6) are arranged in the groove, the two end parts of the two connecting rings can be detachably connected and fixed respectively, the connecting rings are also provided with lug plates (7), and one end of the mooring chain (4) is connected onto the lug plates.
7. The offshore floating wind power platform of claim 1 or 4, wherein: the counter weight 5 is made of concrete by pouring.
8. The offshore floating wind power platform of claim 1, wherein: the middle part of the connecting column (3) penetrates through the floating platform (1), the bottom of the connecting column is connected with the damping body (2), and the top of the connecting column upwards extends to form a tower cylinder and is provided with a fan unit (8).
9. The offshore floating wind power platform of claim 1, wherein: the positioning anchor (20) is connected with a buoy cable (9), and the other end of the buoy cable is provided with an anchor buoy (10) floating on the sea surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336258.0A CN112373640A (en) | 2020-11-25 | 2020-11-25 | Offshore floating wind power platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336258.0A CN112373640A (en) | 2020-11-25 | 2020-11-25 | Offshore floating wind power platform |
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| CN112373640A true CN112373640A (en) | 2021-02-19 |
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| CN202011336258.0A Pending CN112373640A (en) | 2020-11-25 | 2020-11-25 | Offshore floating wind power platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217295A (en) * | 2021-06-21 | 2021-08-06 | 中天科技海缆股份有限公司 | Shallow water floating type wind power system and dynamic cable assembly thereof |
| CN114932982A (en) * | 2022-05-19 | 2022-08-23 | 中国华能集团清洁能源技术研究院有限公司 | Floating type platform and offshore wind power system |
Citations (7)
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|---|---|---|---|---|
| JP2001063684A (en) * | 1999-08-25 | 2001-03-13 | Mitsubishi Heavy Ind Ltd | Supporting float body for tower shaped structure |
| CN202152102U (en) * | 2011-04-19 | 2012-02-29 | 中国科学院工程热物理研究所 | Floating type wind power generation platform |
| KR20140052353A (en) * | 2012-10-24 | 2014-05-07 | 한국해양과학기술원 | Floating wind power generation with passive underwater heaving and rolling/pitching damper, passive heaving and rolling/pitching damper for floating wind power generation |
| CN105438411A (en) * | 2015-11-16 | 2016-03-30 | 中国能源建设集团江苏省电力设计院有限公司 | Offshore wind power spar buoyant foundation capable of towing |
| CN206634173U (en) * | 2017-04-24 | 2017-11-14 | 宁夏康泓矿山机械设备有限公司 | A kind of floating type wind power generation platform |
| CN109484575A (en) * | 2019-01-11 | 2019-03-19 | 大连海事大学 | Semisubmersible platform catenary mooring system and its installation method |
| CN111469992A (en) * | 2020-03-17 | 2020-07-31 | 中国电建集团华东勘测设计研究院有限公司 | Floating offshore wind power structure foundation with damping effect and stability control method |
-
2020
- 2020-11-25 CN CN202011336258.0A patent/CN112373640A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001063684A (en) * | 1999-08-25 | 2001-03-13 | Mitsubishi Heavy Ind Ltd | Supporting float body for tower shaped structure |
| CN202152102U (en) * | 2011-04-19 | 2012-02-29 | 中国科学院工程热物理研究所 | Floating type wind power generation platform |
| KR20140052353A (en) * | 2012-10-24 | 2014-05-07 | 한국해양과학기술원 | Floating wind power generation with passive underwater heaving and rolling/pitching damper, passive heaving and rolling/pitching damper for floating wind power generation |
| CN105438411A (en) * | 2015-11-16 | 2016-03-30 | 中国能源建设集团江苏省电力设计院有限公司 | Offshore wind power spar buoyant foundation capable of towing |
| CN206634173U (en) * | 2017-04-24 | 2017-11-14 | 宁夏康泓矿山机械设备有限公司 | A kind of floating type wind power generation platform |
| CN109484575A (en) * | 2019-01-11 | 2019-03-19 | 大连海事大学 | Semisubmersible platform catenary mooring system and its installation method |
| CN111469992A (en) * | 2020-03-17 | 2020-07-31 | 中国电建集团华东勘测设计研究院有限公司 | Floating offshore wind power structure foundation with damping effect and stability control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217295A (en) * | 2021-06-21 | 2021-08-06 | 中天科技海缆股份有限公司 | Shallow water floating type wind power system and dynamic cable assembly thereof |
| CN113217295B (en) * | 2021-06-21 | 2022-07-08 | 中天科技海缆股份有限公司 | Shallow water floating type wind power system and dynamic cable assembly thereof |
| CN114932982A (en) * | 2022-05-19 | 2022-08-23 | 中国华能集团清洁能源技术研究院有限公司 | Floating type platform and offshore wind power system |
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Application publication date: 20210219 |