CN212423403U - Multi-floating-body platform of offshore floating type wind turbine - Google Patents
Multi-floating-body platform of offshore floating type wind turbine Download PDFInfo
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- CN212423403U CN212423403U CN202020701210.4U CN202020701210U CN212423403U CN 212423403 U CN212423403 U CN 212423403U CN 202020701210 U CN202020701210 U CN 202020701210U CN 212423403 U CN212423403 U CN 212423403U
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Abstract
The utility model relates to a many floating body platforms of marine floating wind energy conversion system, including last body and lower body, go up the body and connect through the tension tendon that is in tensile state between the body down, it includes fixed buoyancy tank, variable buoyancy tank, the basis ballast that from the top down set gradually to go up the body, fixed buoyancy tank is used for providing buoyancy, variable buoyancy tank includes first cavity and first ballast pump, the body includes the ballast down. Compared with the prior art, the utility model discloses under external load effect, the displacement takes place for the floating body, and the pulling force of lower body transmits supreme body through the tension tendon that links to each other with it, has reduced the floating body motion on the one hand, and on the other hand has accelerated the speed that the floating body resumes to balanced position, has improved the stability of system, has not only reduced and has surged, has pitched and has shaken first the response, and has inherited the good motion characteristic of Spar platform.
Description
Technical Field
The utility model relates to an offshore wind turbine floating foundation especially relates to a many floating body platforms of marine floating wind turbine.
Background
Energy is the fundamental guarantee for human survival and development. With the rapid growth of economy in China, the industrialization process is continuously accelerated, the problems of energy shortage, environmental pollution and the like are increasingly highlighted, and wind energy as clean energy is widely concerned. Compared with land wind energy, offshore wind energy has the advantages of high wind speed, low turbulence, abundant reserves, no land resource occupation and the like, and the main direction of future wind power development is 'from land to sea' which becomes the consensus of academic circles and business circles.
At present, a fixed foundation is mostly adopted for a floating wind turbine in an offshore shallow water region, but as the water depth is increased, economic benefits show that the floating platform can better meet the requirements of cost and environment. At this stage, widely used floating platforms are a Tension Leg Platform (Tension Leg Platform), a Barge Platform (Barge Platform), a Semi-Submersible Platform (Semi-Submersible Platform), and a Spar Platform (Spar Platform), as shown in fig. 1. The Spar platform has the advantages that the center of gravity of the Spar platform is reduced through the ballast tank to guarantee structural stability, the integral stability of the platform is obviously improved by matching with catenary mooring, and in addition, the inherent period of six degrees of freedom is far away from a deep sea wave frequency concentration area, so the Spar platform has good motion characteristics, but the span is large, the installation is inconvenient, and the manufacturing cost is overhigh.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a many floating body platforms of marine floating wind energy conversion system in order to overcome the defects that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a many floating body platforms of marine floating wind turbine, includes upper buoy and lower buoy, connect through the tension tendon that is in tensile state between upper buoy and the lower buoy, upper buoy includes fixed buoyancy tank, variable buoyancy tank, the basis ballast that sets gradually from the top down, fixed buoyancy tank is used for providing buoyancy, variable buoyancy tank includes first cavity and first ballast pump, lower buoy includes the ballast.
Preferably, the fixed buoyancy chambers are filled with gas.
Preferably, the gas is air.
Preferably, the tendons are connected between the base ballast and the lower hull.
Preferably, the base ballast is constructed steel.
Preferably, the lower float further comprises a second cavity and a second ballast pump.
Preferably, the lower floating body is of a solid structure.
Preferably, the upper buoy is connected with one end of a mooring system, and the other end of the mooring system is fixed on the sea bottom.
Preferably, one end of the mooring system is fixed at the base ballast of the upper buoy.
Preferably, the ballast is concrete.
Compared with the prior art, the utility model has the advantages of it is following:
1. the tension tendon connected with the upper floating body and the lower floating body is always in a stretching state under the action of the tensile force of the upper floating body and the weight force of the lower floating body so as to ensure that the system is relatively stable; under the action of external load, the upper floating body is displaced, and the pulling force of the lower floating body is transmitted to the upper floating body through the tension tendon connected with the upper floating body, so that the movement of the upper floating body is reduced, the speed of the upper floating body recovering to a balance position is increased, and the stability of the system is improved.
2. When the environmental condition is comparatively abominable, go up the body and float the mode that the body accessible was poured into the sea water under with, reduce the system focus to improve platform stability, in addition, also can adjust the length of tension tendon and change the float position under in order to adapt to external adverse circumstances.
3. Along with the change of the depth of the seawater, the lower floating body can be made of different materials as ballast so as to change the quality, the position and the like of the ballast, thereby ensuring the stability of the system and further increasing the applicable water depth range.
4. Compare in current Spar platform, this novel many floating body platform surging, surging and yawing motion response all reduces, and platform stability is showing and is improving.
5. The multi-floating-body platform has smaller size span, reduces the manufacturing and installation difficulty, improves the flexibility of the platform and reduces the cost.
Drawings
FIG. 1 illustrates a floating wind turbine in various forms;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is an enlarged view of a portion of the structure of the present invention;
FIG. 4 is a schematic structural diagram of a floating wind turbine based on a multi-floating-body platform of the invention;
FIG. 5 is a schematic diagram of six-degree-of-freedom motion of a floating platform;
FIG. 6 is a power spectrum of the heave direction of the Spar platform and the present multi-float platform;
FIG. 7 is a graph of the pitch power spectra of Spar platforms and the present multiple hull platform;
FIG. 8 is a chart of the yaw direction power spectra of Spar platform and the present multiple float platform.
The figure is marked with: 1. blade, 2, cabin, 3, tower, 4, sea surface, 5, upper floating body, 6, fixed floating cabin, 7, variable floating cabin, 8, basic ballast, 9, tension tendon, 10, lower floating body, 11, mooring connection point, 12, catenary mooring, 13, first ballast pump, 14, first cavity, 15, second ballast pump, 16, second cavity.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
As shown in FIG. 2, the application provides a multi-floating-body platform of a marine floating wind turbine, which comprises an upper floating body 5 and a lower floating body 10, wherein the upper floating body 5 and the lower floating body 10 are connected through tension tendons 9 in a stretching state. The upper floating body 5 is provided with a wind turbine. The structure that this application adopted ballast tank and platform main part to separate adopts tension tendon 9 to connect both, and when the platform took place to move, the ballast tank (lower floater 10) after the separation exerted reverse direction effort to platform main part (upper floater 5) through continuous tension tendon 9 under the inertial force, and then restrained the platform motion. Compared with the Spar platform, the platform not only reduces the response of surge, pitch and yaw, but also has good motion characteristics of the Spar platform. In addition, in the design stage, the lower floating body 10 can adopt different ballast weights according to the selection of the water depth range so as to adapt to different sea conditions, and the application range of the platform water depth is enlarged.
The upper floating body 5 comprises a fixed floating chamber 6, a variable floating chamber 7 and a basic ballast 8 which are arranged from top to bottom in sequence. The fixed floating cabin 6 is positioned at the top of the upper floating body 5, is hollow and is filled with gas, and in the embodiment, the fixed floating cabin 6 is filled with air to provide buoyancy for the wind turbine. The variable floating cabin 7 is positioned in the middle of the upper floating body 5, is hollow inside, comprises a first cavity 14 and a first ballast pump 13, can open a valve through a control system according to different external environmental conditions, and utilizes the first ballast pump 13 to inject or discharge seawater so as to adapt to different environmental conditions. The basic ballast 8 is located at the bottom of the upper floating body 5, and in this embodiment, the basic ballast 8 is made of structural steel. The upper floating body 5 has lower gravity center and better stability through the mass distribution of 'upper light and lower heavy'.
The lower float 10 is located below the upper float 5 and includes ballast. The ballast is generally concrete. The lower floating body 10 can be of a solid structure and can change along with the depth of service water of the platform, and different materials can be selected as ballast in the design stage so as to adapt to different environmental loads and improve the adaptability of the platform to different depths of water. In addition, the lower floating body 10 may also include a second cavity 16 and a second ballast pump 15 according to the environmental load, as shown in fig. 3, the second ballast pump 15 is used to inject or discharge seawater to improve the adaptability of the system to the environment. In the design stage, the lower hull 10 can be designed with a variety of ballast to suit different sea conditions, depending on the environmental conditions of the service area of the platform.
The tension tendon 9 is positioned between the upper floating body 5 and the lower floating body 10, is specifically connected between the basic ballast 8 and the lower floating body 10, and is always in a stretching state under the action of the tension of the upper floating body 5 and the gravity of the lower floating body 10. When the upper floating body 5 moves under the action of environmental load, the tension tendon 9 transmits the tensile force of the lower floating body 10 to the upper floating body 5, so that the motion response of the upper floating body 5 is reduced, the time for the upper floating body to recover to a balance position is shortened, and the stability of the system is improved. In addition, along with the change of external environmental conditions, the tension tendons 9 can be prolonged or shortened through the control system, and the tension force borne by the upper floating body 5 is adjusted, so that the adaptability of the system to different environments is improved.
As shown in fig. 4, the mooring system is fixed at one end to the foundation ballast 8 of the upper buoyant body 5 by a mooring connection point 11 and at the other end to the sea floor. Under the action of environmental load, the floating wind turbine moves to the maximum displacement position, gradually recovers to the balance position under the action of the pull force of the catenary mooring 12, and finally is in a relatively stable state.
In the stage of platform installation, the length of the tension tendon 9 is shortened through a winch, so that the lower floating body 10 is tightly attached to the bottom of the upper floating body 5, and the multi-floating-body platform is transported to a service sea area by adopting a ship; after the seawater arrives at a designated sea area, the seawater is gradually filled into the sea area through the first ballast pump 13 of the upper floating body 5, so that the seawater is changed from a horizontal state to a vertical state, and then the tension tendon 9 is gradually released through the winch, so that the lower floating body 10 sinks to a designated position. Compared with Spar platforms, the multi-floating-body platform has smaller span, reduces the manufacturing and installation difficulty and greatly reduces the manufacturing cost.
In the operation stage, the platform can inject seawater into the upper floating body 5 or the lower floating body 10 through the ballast pump along with the change of environmental conditions, so that the gravity center of the system is reduced, and the stable operation of the wind turbine is ensured; when the method of using the ballast pump to inject the seawater can not guarantee the platform to run stably, the gravity center of the system can be adjusted by replacing the ballast.
Researches show that the surging, the pitching and the yawing motions have great influence on the stable operation and the power generation efficiency of the wind turbine, as shown in fig. 6. The power spectra of Spar platform and the novel multi-buoy platform in the surge, pitch and yaw directions are respectively shown in fig. 7 and 8. Compare in Spar platform, in the deep water region that the depth of water is 320m, when this many floating body platforms upper floating body 5's height is 98m, lower floating body 10 (adopt the concrete as the ballast) height is 8m, the diameter is 16m, and upper floating body 5 is 33m with lower floating body 10 interval, this novel many floating body platform's surge, pitch and initial motion response all are obviously less than Spar platform.
Claims (10)
1. The utility model provides a many floating body platforms of offshore floating wind turbine, characterized in that, includes upper buoy body (5) and lower buoy body (10), connect through tension tendon (9) that are in tensile state between upper buoy body (5) and the lower buoy body (10), upper buoy body (5) are including fixed buoyancy tank (6), variable buoyancy tank (7), basis ballast (8) that set gradually from the top down, fixed buoyancy tank (6) are used for providing buoyancy, variable buoyancy tank (7) include first cavity and first ballast pump, lower buoy body (10) are including the ballast.
2. The offshore floating wind turbine multi-floating-body platform as recited in claim 1, wherein the fixed floating chambers (6) are filled with gas.
3. The offshore floating wind turbine multi-float platform of claim 2, wherein the gas is air.
4. An offshore floating wind turbine multi-buoyant platform according to claim 1 wherein the tendons (9) are connected between the base ballast (8) and the lower buoyant body (10).
5. The offshore floating wind turbine multi-float platform according to claim 1, characterized in that the basic ballast (8) is made of structural steel.
6. The offshore floating wind turbine multi-buoy platform of claim 1, characterized in that the lower buoy (10) further comprises a second cavity and a second ballast pump.
7. The offshore floating wind turbine multi-buoy platform of claim 1, characterized in that the lower buoy (10) is a solid structure.
8. The offshore floating wind turbine multi-buoy platform as claimed in claim 1, wherein the upper buoy (5) is connected with one end of a mooring system, and the other end of the mooring system is fixed on the sea floor.
9. An offshore floating wind mill multi-float platform according to claim 8, characterized in that one end of the mooring system is fixed at the base ballast (8) of the upper float (5).
10. The offshore floating wind turbine multi-floating-body platform as claimed in claim 1, wherein the ballast is concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020701210.4U CN212423403U (en) | 2020-04-30 | 2020-04-30 | Multi-floating-body platform of offshore floating type wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020701210.4U CN212423403U (en) | 2020-04-30 | 2020-04-30 | Multi-floating-body platform of offshore floating type wind turbine |
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| Publication Number | Publication Date |
|---|---|
| CN212423403U true CN212423403U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020701210.4U Expired - Fee Related CN212423403U (en) | 2020-04-30 | 2020-04-30 | Multi-floating-body platform of offshore floating type wind turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111483564A (en) * | 2020-04-30 | 2020-08-04 | 上海理工大学 | Multi-floating-body platform of offshore floating type wind turbine |
-
2020
- 2020-04-30 CN CN202020701210.4U patent/CN212423403U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111483564A (en) * | 2020-04-30 | 2020-08-04 | 上海理工大学 | Multi-floating-body platform of offshore floating type wind turbine |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |