CN110712724A - Floating type fan platform with high self-stability - Google Patents

Floating type fan platform with high self-stability Download PDF

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Publication number
CN110712724A
CN110712724A CN201910978031.7A CN201910978031A CN110712724A CN 110712724 A CN110712724 A CN 110712724A CN 201910978031 A CN201910978031 A CN 201910978031A CN 110712724 A CN110712724 A CN 110712724A
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China
Prior art keywords
buoyancy
fan
platform
floating
tank
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CN201910978031.7A
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Chinese (zh)
Inventor
刘海笑
陈映宇
张玉明
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Tianjin University
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Tianjin University
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B2021/505—Methods for installation or mooring of floating offshore platforms on site
    • 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)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sustainable Development (AREA)
  • Wind Motors (AREA)

Abstract

The invention discloses a floating type fan platform with high self-stability, which comprises a fan, a buoyancy chamber, a ballast chamber and a mooring system, wherein a transition section is connected between the buoyancy chamber and the fan, the transition section is cylindrical, the fan is fixed at the top of the transition section, and the bottom of the transition section is fixed with the top of the buoyancy chamber. The buoyancy tank is a hollow circular table with the diameter of the top larger than that of the bottom, and the ballast tank is a solid disc; the buoyancy tank improves the floating center of the floating fan platform through the shape of the buoyancy tank, the ballast tank is arranged below the buoyancy tank, the gravity center of the platform is reduced, the weight of the ballast tank is reduced, meanwhile, the disc-shaped ballast tank reduces the heaving response and the pitching response of the platform, and the buoyancy tank can be connected with floating fans of any models through the transition section. The floating type fan platform provided by the invention has the advantages that the self-stability of the platform is increased, the floating type fan platform not only has excellent response performance in severe sea conditions, but also has excellent economy, and the floating type fan platform can be suitable for any water depth.

Description

Floating type fan platform with high self-stability
Technical Field
The invention relates to a wind power generation facility, in particular to a floating type fan platform with high self-stability.
Background
With the gradual progress of energy development of human beings to the ocean field, a plurality of novel floating ocean platforms emerge, and the platforms are widely applied to the industry of human beings developing ocean resources at present and are responsible for various works such as drilling, production, offshore crude oil treatment, wind power generation and the like. The application range of the platform in the prior art is limited by corresponding water depth conditions, and the platform of a single type is difficult to popularize to any water depth. In order to solve the above difficulties, a new floating wind turbine platform with excellent stability suitable for any water depth needs to be developed.
Disclosure of Invention
The existing floating type fan platform with a single type is limited by corresponding water depth conditions and has no universality. Aiming at the problem in the prior art, the invention provides a floating type fan platform which is suitable for any water depth and has high self-stability.
In order to solve the technical problem, the floating type fan platform with high self-stability provided by the invention comprises a fan, a buoyancy chamber, a ballast tank and a mooring system, wherein the buoyancy chamber is arranged above the ballast tank, the fan is arranged above the buoyancy chamber, a transition section is connected between the buoyancy chamber and the fan, the transition section is a cylinder, the fan is fixed at the top of the transition section, and the bottom of the transition section is fixed with the top of the buoyancy chamber.
Further, according to the floating type fan platform with high self-stability, the buoyancy cabin is a circular truncated cone with the diameter of the top larger than that of the bottom; the ballast tank is a disc; the bottom surface of the transition section is attached to the top surface of the buoyancy cabin, and the diameter of the top of the buoyancy cabin is larger than that of the transition section; the bottom surface of the buoyancy tank is attached to the top surface of the ballast tank, the diameter of the ballast tank is larger than that of the bottom of the buoyancy tank, the central axes of the transition section, the buoyancy tank and the ballast tank are overlapped, one end of a mooring cable of the mooring system is fixed to the bottom of the ballast tank, and the other end of the mooring cable is fixed to the sea bottom.
The transition section, the buoyancy chamber and the ballast tank are all made of reinforced concrete materials.
The buoyancy tank is of a hollow structure, and the ballast tank is of a solid structure.
In the floating type fan platform, the fan comprises a rotor, a cabin and a tower column, and the total mass of the fan is m2The horizontal wind force borne by the center of the fan is FwThe maximum wind-leaning moment of the fan is MwThe distance between the gravity center of the fan and the bottom of the tower column is H4The distance between the center of the hub of the fan and the bottom of the tower column is H5The inclination angle of the floating type fan platform is alpha, the distance from the integral gravity center of the floating type fan platform to the bottom of the buoyancy cabin is SK, and the distance from the integral buoyancy center of the floating type fan platform to the bottom of the buoyancy cabin is PK; the height of the transition section is H1The height of the buoyancy chamber is H2Total mass m of floating fan platform1Satisfies the following conditions:
Figure BDA0002234284890000021
where ρ iscIs the density of the concrete, rhowIs the density of seawater; height H of transition section1Satisfies the following conditions:
Figure BDA0002234284890000022
wherein h isfIs the heave amplitude of the floating fan platform; diameter D of the transition section1Is larger than the diameter of the bottom of the fan; height H of buoyancy module2Satisfies the following conditions: h2≤h-H1-H3-hf-hk-0.25h, wherein h is water depth; h iskIs the vertical variation height h of the ballast tank when the ballast tank is inclinedk＝0.5D2sinα；D2Is the diameter of the ballast tank, H3Is the height of the ballast tank; buoyancy tank roof diameter d1And diameter d of the bottom2The ratio of Q; the natural pitch frequency omega of the floating fan platform is as follows:
Figure BDA0002234284890000023
selecting a design scheme with small natural pitching frequency of the floating fan platform as an alternative scheme according to the wave spectrum parameters of the target sea area, and determining coagulationDiameter D of the earth ballast tank2And height H3The value range of (a).
Compared with the prior art, the invention has the beneficial effects that:
1) the diameter of the transition section is slightly larger than the diameter of the bottom of the floating type fan, and the minimum size of the transition section is selected to be beneficial to reducing the water surface area of the platform under the condition of meeting the requirement of safely supporting the floating type fan.
2) Compared with a cylindrical hollow buoyancy cabin with the same volume and the same height, the circular truncated cone-shaped hollow buoyancy cabin with the diameter of the top larger than that of the bottom improves the floating center of the floating fan platform.
3) The solid ballast tanks disposed below the buoyancy tanks allow the center of gravity of the platform to be lowered thereby reducing the ballast tank weight and economic cost of ballast tank construction.
4) The disc-shaped ballast tank increases the vertical damping and pitch damping of the platform by its shape, reducing the heave response and pitch response of the platform.
5) Because the outstanding self-stability of platform, the mooring system only needs to play the effect of restriction platform bow response, and the mooring system adopts catenary mooring can satisfy the safe operation requirement, and the mooring requirement is lower.
6) The mooring line is tied at the edge of the ballast tank, and the mooring radius can be reduced due to the larger diameter of the ballast tank, so that the mooring cost is reduced.
Drawings
FIG. 1 is a schematic structural view of a floating wind turbine platform of the present invention;
FIG. 2 is a top view of the floating fan platform of FIG. 1;
fig. 3 is a schematic diagram of the dimensions of various portions of the floating wind turbine platform of the present invention.
In the figure, 1-fan, 2-transition section, 3-buoyancy chamber, 4-ballast chamber, 5-mooring system.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, which are not intended to limit the invention in any way.
As shown in fig. 1 and 2, the floating type wind turbine platform with high self-stability provided by the invention comprises a wind turbine 1, a buoyancy tank 3, a ballast tank 4 and a mooring system 5, wherein the buoyancy tank 3 is arranged above the ballast tank 4, the wind turbine 1 is arranged above the buoyancy tank 3, a transition section 2 is connected between the buoyancy tank 3 and the wind turbine 1, the transition section 2 is a cylinder, the wind turbine 1 is fixed at the top of the transition section 2, and the bottom of the transition section 2 is fixed with the top of the buoyancy tank 3. The buoyancy cabin 3 is a circular truncated cone with the diameter of the top larger than that of the bottom; the ballast tank 4 is a disc; the bottom surface of the transition section 2 is attached to the top surface of the buoyancy cabin 3, and the diameter of the top of the buoyancy cabin 3 is larger than that of the transition section 2; the bottom surface of the buoyancy tank 3 is attached to the top surface of the ballast tank 4, the diameter of the ballast tank 4 is larger than that of the bottom of the buoyancy tank 3, the central axes of the transition section 2, the buoyancy tank 3 and the ballast tank 4 coincide, the buoyancy tank 3 is of a hollow structure, and the ballast tank 4 is of a solid structure. The floating type fan platform adopts the design, and based on the tumbler principle, the platform can ensure excellent self-stability under any water depth condition.
The invention can be connected with floating fans of any type through the transition section 2. The transition section 2 is used for connecting the floating fan 1 at the upper part with the buoyancy cabin 3 at the lower part, the diameter of the transition section 2 is slightly larger than the diameter of the bottom of the floating fan 1, and the smallest transition section 2 is beneficial to reducing the water surface area of the platform under the condition of supporting the floating fan.
In the invention, the buoyancy cabin 3 mainly provides buoyancy for the platform, adopts a circular truncated cone shape with the diameter of the top larger than that of the bottom, and compared with a cylindrical hollow buoyancy cabin with the same volume and the same height, the circular truncated cone type buoyancy cabin obviously improves the floating center of the floating fan platform.
In the present invention, the ballast tank 4 of the platform is provided separately. Arranged below the buoyancy tank 3 is a ballast tank 4 of solid construction, unlike a floating platform without ballast tanks, so that the centre of gravity of the platform is lowered. The increased center of gravity and center of buoyancy spacing reduces the required weight of the ballast tank 4 and thus reduces the economic cost of constructing the ballast tank 4 while maintaining the same stability.
According to the invention, the disc-shaped ballast tank increases the vertical damping and the pitch damping of the platform through the shape of the ballast tank, and reduces the heave response and the pitch response of the platform.
In the invention, the used mooring mode is catenary mooring, a reserved hole for installing a mooring rope is arranged at the edge of the bottom of the ballast tank, one end of the mooring rope of the mooring system 5 is fixed at the bottom of the ballast tank 4, and the other end of the mooring rope is fixed at the sea bottom. And the mooring rope used by the platform passes through the reserved hole site to complete the connection with the seabed anchoring structure.
In the invention, the transition section 2, the buoyancy chamber 3 and the ballast tank 4 are all made of reinforced concrete materials, so that the material source is wide and the construction cost is low.
In the floating type fan platform, the fan 1 comprises a rotor, a cabin and a tower column, and the total mass of the fan 1 is m2The horizontal wind force borne by the center of the fan 1 is FwThe maximum wind-leaning moment of the fan 1 is MwThe distance between the gravity center of the fan and the bottom of the tower column is H4The distance between the center of the hub of the fan and the bottom of the tower column is H5The inclination angle of the floating fan platform is alpha, the distance from the integral gravity center of the floating fan platform to the bottom of the buoyancy cabin 3 is SK, and the distance from the integral buoyancy center of the floating fan platform to the bottom of the buoyancy cabin 3 is PK; as shown in FIG. 3, the transition section 2 has a height H1The height of the buoyancy chamber 3 is H2Total mass m of floating fan platform1Satisfies the following conditions:
Figure BDA0002234284890000041
where ρ iscIs the density of the concrete, rhowIs the density of seawater;
height H of transition section 21Satisfies the following conditions:wherein h isfIs the heave amplitude of the floating fan platform;
diameter D of transition section 21Is larger than the diameter of the bottom of the fan;
height H of buoyancy compartment 32Should ensureThe safety of the platform under extreme environmental load is proved, namely the bottom of the platform is not contacted with the surface of the sea bed, and the total draught of the platform is less than the water depth h and the heave amplitude hfA reserved safe distance of 0.25h and a vertical change height h when the ballast tank is inclinedkSum, therefore, H should be satisfied2≤h-H1-H3-hf-hk0.25h, wherein hk＝0.5D2sinα。
D2Is the diameter of the ballast tank 4, H3Is the height of the ballast tank 4; diameter d of the top of the buoyancy chamber 31And diameter d of the bottom2The ratio of Q; ballast tank diameter D2Height H3And natural frequency of pitch of the vessel:
Figure BDA0002234284890000043
because the natural frequency of the platform pitching should avoid the high energy range of the waves, a scheme meeting the requirements can be obtained according to the wave spectrum parameters of the target sea area, and a design scheme with smaller platform natural frequency is selected as an alternative scheme, namely the diameter D of the concrete ballast tank can be determined2Height H3The value range of (a).
While the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are illustrative only and not restrictive, and various modifications which do not depart from the spirit of the present invention and which are intended to be covered by the claims of the present invention may be made by those skilled in the art.

Claims (5)

1. The utility model provides a floating fan platform with high self-stability, includes fan (1), buoyancy tank (3), ballast tank (4) and mooring system (5), buoyancy tank (3) set up the top of ballast tank (4), fan (1) sets up the top of buoyancy tank (3), its characterized in that, buoyancy tank (3) with be connected with changeover portion (2) between fan (1), changeover portion (2) are the cylinder, fan (1) are fixed in the top of changeover portion (2), the bottom of changeover portion (2) with the top of buoyancy tank (3) is fixed.
2. The floating fan platform with high self-stability according to claim 1, wherein the buoyancy compartment (3) is a circular truncated cone with a top diameter larger than a bottom diameter; the ballast tank (4) is a disc; the bottom surface of the transition section (2) is attached to the top surface of the buoyancy cabin (3), and the diameter of the top of the buoyancy cabin (3) is larger than that of the transition section (2); the bottom surface of the buoyancy chamber (3) is attached to the top surface of the ballast chamber (4), the diameter of the ballast chamber (4) is larger than that of the bottom of the buoyancy chamber (3), the central axes of the transition section (2), the buoyancy chamber (3) and the ballast chamber (4) are overlapped, one end of a mooring rope of the mooring system (5) is fixed to the bottom of the ballast chamber (4), and the other end of the mooring rope is fixed to the sea bottom.
3. The floating wind turbine platform with high degree of self-stability according to claim 2, wherein the transition section (2), the buoyancy tank (3) and the ballast tank (4) are all made of reinforced concrete material.
4. The floating wind turbine platform of claim 3, wherein: the buoyancy tank (3) is of a hollow structure, and the ballast tank (4) is of a solid structure.
5. The floating wind turbine platform with high degree of self-stability according to claim 4, said wind turbine (1) comprising a rotor, a nacelle and a tower, said wind turbine (1) having a total mass m2The horizontal wind power borne by the center of the fan (1) is FwThe maximum wind-leaning moment of the fan (1) is MwThe distance between the gravity center of the fan and the bottom of the tower column is H4The distance between the center of the hub of the fan and the bottom of the tower column is H5The inclination angle of the floating fan platform is alpha, the distance from the integral gravity center of the floating fan platform to the bottom of the buoyancy cabin (3) is SK, and the distance from the integral buoyancy center of the floating fan platform to the bottom of the buoyancy cabin (3) is PK; the method is characterized in that:
height of transition section (2)Degree of H1The height of the buoyancy chamber (3) is H2Total mass m of floating fan platform1Satisfies the following conditions:
Figure FDA0002234284880000011
where ρ iscIs the density of the concrete, rhowIs the density of seawater;
height H of the transition section (2)1Satisfies the following conditions:
Figure FDA0002234284880000012
wherein h isfIs the heave amplitude of the floating fan platform;
diameter D of the transition section (2)1Is larger than the diameter of the bottom of the fan;
height H of the buoyancy compartment (3)2Satisfies the following conditions: h2≤h-H1-H3-hf-hk-0.25h, wherein h is water depth; h iskIs the vertical height change h of the ballast tank (4) when the ballast tank is inclinedk＝0.5D2sinα；
D2Is the diameter of the ballast tank (4), H3Is the height of the ballast tank (4); the diameter d of the top of the buoyancy cabin (3)1And diameter d of the bottom2The ratio of Q; the natural pitch frequency omega of the floating fan platform is as follows:
Figure FDA0002234284880000021
according to wave spectrum parameters of a target sea area, a design scheme with small natural pitching frequency of the floating wind turbine platform is selected as an alternative scheme, and the diameter D of the concrete ballast tank (4) can be determined2And height H3The value range of (a).
CN201910978031.7A 2019-10-15 2019-10-15 Floating type fan platform with high self-stability Pending CN110712724A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111361699A (en) * 2020-04-01 2020-07-03 中山大学 Floating wind power platform suitable for near-shore shallow water area
CN113200129A (en) * 2021-06-11 2021-08-03 中国船舶重工集团海装风电股份有限公司 Novel float formula fan platform
CN113562130A (en) * 2021-08-24 2021-10-29 天津大学 Floating fan platform with height self-balancing

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CN103818523A (en) * 2014-03-04 2014-05-28 新疆金风科技股份有限公司 Floating fan base with flare type tension legs, marine wind-driven generator and construction method
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Publication number Priority date Publication date Assignee Title
DE10337997A1 (en) * 2003-08-19 2005-03-10 Zeljko Gajic Anchoring device for off-shore wind-powered energy plant using anchoring lines attached to foundation provided as vertically aligned elongate float body
US20060005617A1 (en) * 2004-07-06 2006-01-12 Lemieux David L Method and apparatus for determining a site for an offshore wind turbine
WO2011092437A1 (en) * 2010-01-29 2011-08-04 Dcns Floating support for offshore structure such as a wind generator in particular
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111361699A (en) * 2020-04-01 2020-07-03 中山大学 Floating wind power platform suitable for near-shore shallow water area
CN111361699B (en) * 2020-04-01 2022-04-12 中山大学 Floating wind power platform suitable for near-shore shallow water area
CN113200129A (en) * 2021-06-11 2021-08-03 中国船舶重工集团海装风电股份有限公司 Novel float formula fan platform
CN113562130A (en) * 2021-08-24 2021-10-29 天津大学 Floating fan platform with height self-balancing

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