CN113202698A - Method for realizing eccentric semi-submersible type floating fan foundation - Google Patents
Method for realizing eccentric semi-submersible type floating fan foundation Download PDFInfo
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- CN113202698A CN113202698A CN202110579486.9A CN202110579486A CN113202698A CN 113202698 A CN113202698 A CN 113202698A CN 202110579486 A CN202110579486 A CN 202110579486A CN 113202698 A CN113202698 A CN 113202698A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention belongs to the field of offshore wind and power engineering, and particularly relates to a method for realizing an eccentric semi-submersible floating fan foundation, which comprises the following steps of selecting and designing a fan, a first buoy, a second buoy, a third buoy, a middle upright post, a first edge upright post, a second edge upright post and a third edge upright post; step two: splicing the first buoy, the second buoy and the third buoy to form a symmetrical Y-shaped structure; step three: and installing the floating type fan foundation and the fan. The floating fan foundation designed by the invention adopts an eccentric design, so that the stability of the fan can be improved, and the generated energy can be further improved.
Description
Technical Field
The invention belongs to the field of offshore wind power engineering, and particularly relates to a method for realizing an eccentric semi-submersible floating fan foundation.
Background
With the development of offshore wind power, the technology of floating wind turbines is gradually mature, and floating wind turbines begin to appear in offshore and open sea areas, including sea areas of various water depths and complex terrains. The semi-submersible foundation is one of floating fan foundations, and has the advantages of wide applicable water depth range, convenience in installation and good stability. The floating type fan can be influenced by wind, wave and current loads when working on the sea, the lower base structure swings and is separated from the balance position, and the power generation efficiency of the fan is reduced. The vertical columns of the traditional semi-submersible foundation are connected through the guide pipes, the drainage volume is mostly provided by the side vertical columns, and the requirement on the depth of water in the sea area is high. On the other hand, the traditional semi-submersible foundation mostly adopts a central structure, and the fan is used as an unbalanced body, so that the stability of a central structure platform is not high, and the power generation efficiency of the fan is reduced. In addition, the traditional semi-submersible foundation mostly adopts a three-upright-column structure, so that the center of gravity of the foundation is higher, and the stability of the foundation is poorer.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides a technical scheme of an implementation method of an eccentric semi-submersible floating fan foundation.
The method for realizing the eccentric semi-submersible floating fan foundation is characterized by comprising the following steps
The method comprises the following steps: the fan, the first buoy, the second buoy, the third buoy, the middle upright post, the first side upright post and the second side upright post are alignedThe column and the third column are selected and designed to satisfy the formula M + G1×D1×2＝G2×D2+GIn×D3And the requirement that the length of the first pontoon be less than the lengths of the second and third pontoons,
wherein M is the moment generated by wind load, the sum of the gravity of the second buoy and the second side upright post and the sum of the gravity of the third buoy and the third side upright post are G1，D1The length of the second buoy and the third buoy, G2Is the sum of the gravity of the first buoy and the first side column, D2Is the length of the first pontoon, GInIs the sum of the gravity of the central upright post and the blower fan D3The vertical distance between the gravity center of the whole middle upright post and the fan (10) and the first buoy is set;
step two: splicing the first buoy, the second buoy and the third buoy to form a symmetrical Y-shaped structure;
step three: the floating type fan foundation and the fan are installed, wherein the middle upright posts are installed at the cross connection positions of the first floating barrel, the second floating barrel and the third floating barrel in a matched mode, the first side upright posts are installed on the outer end of the first floating barrel in a matched mode, the second side upright posts are installed on the outer end of the second floating barrel in a matched mode, and the third side upright posts are installed on the outer end of the third floating barrel in a matched mode.
The method for realizing the eccentric semi-submersible floating fan foundation is characterized in that the moment M is F multiplied by H, wherein F is the rated thrust of the fan, and H is the vertical distance between the fan impeller hub and the surface of the first buoy.
The method for realizing the eccentric semi-submersible floating fan foundation is characterized in that in the first step, the length of the first buoy is designed to be 30-75% of the length of the second buoy.
The method for realizing the eccentric semi-submersible floating fan foundation is characterized in that in the second step, water pressing plates are respectively arranged at the bottoms of the outer ends of the first buoy, the second buoy and the third buoy.
The method for realizing the eccentric semi-submersible floating fan foundation is characterized in that in the third step, when the floating fan foundation and the fan are installed, the first buoy, the second buoy and the third buoy are moored through corresponding anchor chains respectively.
Compared with the prior art, the invention has the beneficial effects that:
1) the floating type fan foundation designed by the invention adopts an eccentric design, so that the stability of the fan can be improved, and the generating capacity can be further improved;
2) the length of the buoys at the bottom of the floating type fan foundation designed by the invention is different, so that when the floating type fan foundation is acted by waves, certain offset effect is achieved among the waves, the effect of wave load on the foundation is reduced, the fatigue of the fan is reduced, and the service life of the fan is prolonged;
3) the floating type fan foundation designed by the invention adopts an eccentric structure which is more stable in work and small in structural stress, and can reduce the fatigue of the foundation, reduce the steel consumption of the foundation and reduce the manufacturing cost;
4) the bottom of the floating type fan foundation designed by the invention adopts a full-floating-cylinder structure, so that the water displacement is increased, and the applicable water depth range is wide;
5) the bottom of the floating type fan foundation designed by the invention is connected by adopting the full floating cylinders, and the gravity center of the fan can be reduced and the stability of the fan can be improved by changing the material of the filler.
Drawings
FIG. 1 is a flow chart of a method for implementing an eccentric semi-submersible floating fan foundation according to the present invention;
FIG. 2 is a schematic structural view of an eccentric semi-submersible floating fan foundation of the present invention when a fan is installed, and anchor chains are not shown in the figure;
FIG. 3 is a schematic top view of an eccentric semi-submersible floating fan foundation according to the present invention;
fig. 4 is a schematic view of the basic structure of the eccentric semi-submersible floating fan of the present invention, and the anchor chain is not shown in the figure.
Detailed Description
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
The invention will be further explained with reference to the drawings.
As shown in the figure, a method for realizing an eccentric semi-submersible floating fan foundation,
the method comprises the following steps: the fan 10, the first buoy 1, the second buoy 2, the third buoy 3, the middle upright post 4, the first side upright post 5, the second side upright post 6 and the third side upright post 7 are selected and designed to meet the formula M + G1×D1×2＝G2×D2+GIn×D3And the requirement that the length of the first pontoon 1 is smaller than the lengths of the second and third pontoons 2 and 3,
wherein M is the moment generated by wind load, and the sum of the gravity of the second buoy 2 and the second side upright post 6 and the sum of the gravity of the third buoy 3 and the third side upright post 7 are G1，D1The length of the second buoy 2 and the third buoy 3, G2Is the sum of the gravity of the first buoy 1 and the first side upright post 5, D2Is the length of the first buoy 1, GInIs the sum of the gravity of the central upright post 4 and the blower 10D3The vertical distance between the gravity center of the whole body of the central upright post 4 and the fan 10 and the first buoy 1 is set;
step two: splicing the first buoy 1, the second buoy 2 and the third buoy 3 to form a symmetrical Y-shaped structure;
step three: the floating type fan foundation and the fan 10 are installed, wherein the middle upright post 4 is installed at the cross connection part of the first floating barrel 1, the second floating barrel 2 and the third floating barrel 3 in a matched mode, the first side upright post 5 is installed at the outer end of the first floating barrel 1 in a matched mode, the second side upright post 6 is installed at the outer end of the second floating barrel 2 in a matched mode, and the third side upright post 7 is installed at the outer end of the third floating barrel 3 in a matched mode.
As an optimization: the moment M is F × H, where F is the rated thrust of the fan 10, H is the vertical distance from the fan hub to the surface of the first buoy 1, and since F and H are both parameters of the fan itself, M can also be regarded as a parameter of the fan itself.
As an optimization: in the first step, the length of the first buoy 1 is designed to be 30-75% of the length of the second buoy 2. The second buoy 2 is as long as the third buoy 3, and the first side column 5, the second side column 6 and the third side column 7 are positioned at three corners of an isosceles triangle.
As an optimization: and in the second step, water pressing plates 8 are respectively arranged at the bottoms of the outer ends of the first buoy 1, the second buoy 2 and the third buoy 3.
As an optimization: in step three, when the installation of floating fan basis and fan 10, moor first flotation pontoon 1, second flotation pontoon 2 and third flotation pontoon 3 through the anchor chain 9 that corresponds respectively, wherein, two anchor chains 9 are connected in the cooperation of first limit stand 5, an anchor chain 9 is connected in the cooperation of second limit stand 6 and third side stand 7 respectively.
Compared with the traditional three-upright-post semi-submersible foundation, the foundation designed by the invention has the advantage that the upright posts 4 are deviated towards the windward direction. The offset distance is obtained by calculating the wind tilting moment of the wind load to the foundation when the fan 10 works and by utilizing the moment generated by the offset of the gravity center and the principle of moment balance generated when the fan 10 works. Therefore, under the working condition of the fan 10, the eccentric moment can resist a certain wind tilting moment, so that the stability of the fan is improved, and the power generation amount of the fan 10 is further improved.
The eccentric structure body has different lengths of the buoys at the bottom, and the ratio of the first buoy 1 to the second buoy 2 is 0.3-0.75; when receiving the wave impact, the wave has certain offset effect, can reduce the effect of wave load to the basis, promotes the life who floats formula fan system.
The bottom of the semi-submersible foundation designed by the invention is connected by the floating cylinders, so that a large amount of drainage volume can be provided, and compared with the traditional scheme, the semi-submersible foundation can reduce draught and is suitable for relatively shallow water depth. Furthermore, the ballast filler material in the pontoon can be changed, thereby lowering the center of gravity of the foundation and improving the stability of the foundation.
According to the eccentric structure designed by the invention, the truss connection can be increased before the side upright columns and the middle upright columns, so that the integral structural rigidity is improved, and the safety and the reliability under extreme working conditions are better ensured.
The eccentric structure designed by the invention adopts a four-line four-anchor mooring scheme, the first side upright post 5 is provided with two anchor chains 9, and the second side upright post 6 and the third side upright post 7 are respectively provided with one anchor chain 9. The mooring scheme can improve the stability of the whole structure and can also reduce the cost of the anchoring system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. An implementation method of an eccentric semi-submersible floating fan foundation is characterized by comprising
The method comprises the following steps: the fan (10), the first buoy (1), the second buoy (2), the third buoy (3), the middle upright post (4), the first side upright post (5), the second side upright post (6) and the third side upright post (7) are selected and designed to meet the formula M + G1×D1×2＝G2×D2+GIn×D3And the length of the first buoy (1) is less than the length of the second buoy (2) and the third buoy (3),
wherein M is the moment generated by wind load, the sum of the gravity of the second buoy (2) and the second side upright post (6) and the sum of the gravity of the third buoy (3) and the third side upright post (7) are G1，D1The length G of the second buoy (2) and the third buoy (3)2Is the sum of the gravity of the first buoy (1) and the first side upright post (5) D2Is the length of the first buoy (1), GInThe central upright post (4) and the fan (10) are heavySum of forces, D3The vertical distance between the gravity center of the whole body of the central upright post (4) and the fan (10) and the first buoy (1) is set;
step two: splicing the first buoy (1), the second buoy (2) and the third buoy (3) to form a symmetrical Y-shaped structure;
step three: the floating type fan foundation and the fan (10) are installed, wherein the middle upright columns (4) are installed at the cross connection positions of the first floating cylinder (1), the second floating cylinder (2) and the third floating cylinder (3) in a matched mode, the first side upright columns (5) are installed on the outer end of the first floating cylinder (1) in a matched mode, the second side upright columns (6) are installed on the outer end of the second floating cylinder (2) in a matched mode, and the third side upright columns (7) are installed on the outer end of the third floating cylinder (3) in a matched mode.
2. A method of realizing an eccentric semi-submersible floating fan foundation according to claim 1, characterized in that the moment M is F x H, where F is the rated thrust of the fan (10) and H is the vertical distance of the fan hub from the surface of the first pontoon (1).
3. A method for realizing an eccentric semi-submersible floating fan foundation according to claim 1, characterized in that in step one, the length of the first buoy (1) is designed to be 30-75% of the length of the second buoy (2).
4. The method for realizing the eccentric semi-submersible floating fan foundation according to any one of claims 1-3, characterized in that in the second step, the bottom parts of the outer ends of the first buoy (1), the second buoy (2) and the third buoy (3) are respectively provided with a water pressing plate (8).
5. A method for realizing an eccentric semi-submersible floating fan foundation according to any of claims 1-3, characterized in that in the third step, the first buoy (1), the second buoy (2) and the third buoy (3) are moored by corresponding anchor chains (9) when the floating fan foundation and the fan (10) are installed.
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| CN202110579486.9A CN113202698A (en) | 2021-05-26 | 2021-05-26 | Method for realizing eccentric semi-submersible type floating fan foundation |
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| CN202110579486.9A CN113202698A (en) | 2021-05-26 | 2021-05-26 | Method for realizing eccentric semi-submersible type floating fan foundation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151276A (en) * | 2021-11-29 | 2022-03-08 | 中国大唐集团未来能源科技创新中心有限公司 | Eccentric semi-submersible type floating wind turbine control system |
| WO2023108853A1 (en) * | 2021-12-17 | 2023-06-22 | 上海惠生海洋工程有限公司 | Offshore wind power generation platform, floating foundation, and transportation method therefor |
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| WO2023108853A1 (en) * | 2021-12-17 | 2023-06-22 | 上海惠生海洋工程有限公司 | Offshore wind power generation platform, floating foundation, and transportation method therefor |
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