阅读说明：本技术 一种具有高度自平衡性的浮式风机平台 (Floating fan platform with height self-balancing ) 是由 刘海笑 陈映宇 张玉明 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种具有高度自平衡性的浮式风机平台,包括风机、平衡舱、压力舱和系泊系统,平衡舱与风机之间连接有连接段,连接段为圆柱,风机固定于连接段的顶部,连接段的底部与平衡舱的顶部固定。平衡舱为顶部直径大于底部直径的空心圆台,压力舱为实心圆盘；平衡舱通过其形状,提高了浮式风机平台的浮心,压力舱布置于平衡舱以下,降低了平台的重心进而减小了压力舱重量,同时圆盘形的压力舱减小了平台的垂荡响应和纵摇响应,通过连接段可与任意型号的浮式风机相连。本发明的浮式风机平台增加了平台的自平衡性,其既能在恶劣海况中具有优秀的响应性能,又具有优良的经济性,在任意水深下皆可适用。(The invention discloses a floating type fan platform with height self-balance performance, which comprises a fan, a balance cabin, a pressure cabin and a mooring system, wherein a connecting section is connected between the balance cabin and the fan, the connecting section is a cylinder, the fan is fixed at the top of the connecting section, and the bottom of the connecting section is fixed with the top of the balance cabin. The balance cabin is a hollow round table with the diameter of the top larger than that of the bottom, and the pressure cabin is a solid disc; the balance cabin improves the floating center of the floating fan platform through the shape of the balance cabin, the pressure cabin is arranged below the balance cabin, the gravity center of the platform is reduced, the weight of the pressure cabin is reduced, meanwhile, the disc-shaped pressure cabin reduces the heaving response and the pitching response of the platform, and the pressure cabin can be connected with the floating fans of any model through the connecting section. The floating type fan platform provided by the invention has the advantages that the self-balance performance 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.)

1. A floating fan platform with height self-balancing performance comprises a fan (1), a balance cabin (3), a pressure cabin (4) and a mooring system (5), wherein the balance cabin (3) is arranged above the pressure cabin (4), the fan (1) is arranged above the balance cabin (3), the floating fan platform is characterized in that a connecting section (2) is connected between the balance cabin (3) and the fan (1), the connecting section (2) is a cylinder, the fan (1) is fixed at the top of the connecting section (2), and the bottom of the connecting section (2) is fixed with the top of the balance cabin (3);

the balance cabin (3) is a circular truncated cone with the diameter of the top larger than that of the bottom; the pressure chamber (4) is a disc, and the disc-shaped pressure chamber (4) increases the vertical damping and the pitch damping of the platform through the shape of the disc-shaped pressure chamber, so that the heave response and the pitch response of the platform are reduced; the bottom surface of the connecting section (2) is attached to the top surface of the balance cabin (3), the diameter of the top of the balance cabin (3) is larger than that of the connecting section (2), and the floating center of the floating fan platform is improved; the bottom surface of the balance cabin (3) is attached to the top surface of the pressure cabin (4), and the diameter of the pressure cabin (4) is larger than that of the bottom of the balance cabin (3), so that the gravity center of the platform is lowered; the central axes of the connecting section (2), the balance cabin (3) and the pressure cabin (4) are overlapped, one end of a mooring cable of the mooring system (5) is fixed at the bottom of the pressure cabin (4), and the other end of the mooring cable is fixed at the sea bottom;

the total mass of the fan (1) is m₂The horizontal wind power borne by the center of the fan (1) is F_wThe maximum wind-leaning moment of the fan (1) is M_wThe distance between the gravity center of the fan and the bottom of the tower column is H₄The inclination angle of the floating fan platform is alpha, and the distance from the integral floating core of the floating fan platform to the bottom of the balance cabin (3) is PK; the height of the connecting section (2) is H₁The height of the balance cabin (3) is H₂Total mass m of floating fan platform₁Satisfies the following conditions:

where ρ is_cIs the density of the concrete, rho_wIs the density of seawater;

height H of the connecting section (2)₁Satisfies the following conditions:wherein h is_fIs the heave amplitude of the floating fan platform;

diameter D of the connecting section (2)₁Is larger than the diameter of the bottom of the fan;

height H of the balance cabin (3)₂Satisfies the following conditions: h₂≤h-H₁-H₃-h_f-h_k-0.25h, wherein h is water depth; h is_kIs the vertical height change h of the pressure chamber (4) when the pressure chamber is inclined_k＝0.5D₂sinα；

D₂Is the diameter of the pressure chamber (4), H₃Is the height of the pressure chamber (4); diameter d of top of balance cabin (3)₁And diameter d of the bottom₂The ratio of Q; the natural pitch frequency omega of the floating fan platform is as follows:

according to wave spectrum parameters of a target sea area, a design scheme with small natural pitching frequency of the floating type fan platform is selected as an alternative scheme, and the diameter D of the concrete pressure cabin (4) can be determined₂And height H₃The value range of (a).

2. The floating wind turbine platform with high self-balancing according to claim 1, characterised in that the connection section (2), the balancing tank (3) and the pressure tank (4) are made of reinforced concrete material.

3. The floating wind turbine platform of claim 2, wherein: the balance cabin (3) is of a hollow structure, and the pressure cabin (4) is of a solid structure.

Technical Field

The invention relates to a wind power generation facility, in particular to a floating type fan platform with a high self-balancing property.

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, it is necessary to develop a new floating wind turbine platform which is suitable for any water depth and has excellent balance.

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 fan platform with the height self-balancing property comprises a fan, a balance cabin, a pressure cabin and a mooring system, wherein the balance cabin is arranged above the pressure cabin, the fan is arranged above the balance cabin, a connecting section is connected between the balance cabin and the fan, the connecting section is a cylinder, the fan is fixed to the top of the connecting section, and the bottom of the connecting section is fixed to the top of the balance cabin;

the balance cabin is a circular truncated cone with the diameter of the top larger than that of the bottom; the pressure chamber is a disc, and the disc-shaped pressure chamber increases the vertical damping and the pitch damping of the platform through the shape of the disc-shaped pressure chamber, so that the heave response and the pitch response of the platform are reduced; the bottom surface of the connecting section is attached to the top surface of the balance cabin, the diameter of the top of the balance cabin is larger than that of the connecting section, and the floating center of the floating fan platform is improved; the bottom surface of the balance cabin is attached to the top surface of the pressure cabin, and the diameter of the pressure cabin is larger than that of the bottom of the balance cabin, so that the gravity center of the platform is lowered; the central axes of the connecting section, the balance cabin and the pressure cabin are overlapped, one end of a mooring cable of the mooring system is fixed at the bottom of the pressure cabin, and the other end of the mooring cable is fixed on the sea bottom;

the total mass of the fan is m₂The horizontal wind force borne by the center of the fan is F_wThe maximum wind-leaning moment of the fan is M_wThe distance between the gravity center of the fan and the bottom of the tower column is H₄The inclination angle of the floating type fan platform is alpha, and the distance from the integral floating core of the floating type fan platform to the bottom of the balance cabin is PK; the height of the connecting section is H₁The height of the balance cabin is H₂Total mass m of floating fan platform₁Satisfies the following conditions:

where ρ is_cIs the density of the concrete, rho_wIs the density of seawater; height H of connecting section₁Satisfies the following conditions:wherein h is_fIs the heave amplitude of the floating fan platform; diameter D of the connecting section₁Is larger than the diameter of the bottom of the fan; height H of the balance cabin₂Satisfies the following conditions: h₂≤h-H₁-H₃-h_f-h_k-0.25h, wherein h is water depth; h is_kIs the vertical variation height h of the pressure chamber when the pressure chamber is inclined_k＝0.5D₂sinα；D₂Is the diameter of the pressure chamber, H₃Is the height of the pressure chamber; diameter d of top of balance cabin₁And diameter d of the bottom₂The ratio of Q; the natural pitch frequency omega of the floating fan platform is as follows:

according to wave spectrum parameters of a target sea area, a design scheme with small natural pitching frequency of the floating type fan platform is selected as an alternative scheme, and the diameter D of the concrete pressure cabin (4) can be determined₂And height H₃The value range of (a).

Furthermore, the connecting section, the balance cabin and the pressure cabin are all made of reinforced concrete materials.

The balance cabin is of a hollow structure, and the pressure cabin is of a solid structure.

Compared with the prior art, the invention has the beneficial effects that:

1) the diameter of the connecting section is slightly larger than the diameter of the bottom of the floating type fan, and the smallest connecting section size 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 balance cabin with the same volume and the same height, the circular truncated cone-shaped hollow balance 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 pressure tank disposed below the ballast tank allows the center of gravity of the platform to be lowered thereby reducing the weight of the pressure tank and the economic cost of constructing the pressure tank.

4) The disc-shaped pressure chamber increases the vertical damping and the pitch damping of the platform through the shape of the pressure chamber, and reduces the heave response and the pitch response of the platform.

5) Because the outstanding self-balancing nature of platform, the mooring system only needs to play the effect of restriction platform bow response, and the mooring system adopts the catenary mooring can satisfy safe handling requirement, and the mooring requirement is lower.

6) The mooring line is tied at the edge of the pressure chamber, and the mooring radius can be reduced due to the larger diameter of the pressure chamber, 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-connecting section, 3-balance cabin, 4-pressure cabin and 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 fan platform with high self-stability provided by the invention comprises a fan 1, a balance cabin 3, a pressure cabin 4 and a mooring system 5, wherein the balance cabin 3 is arranged above the pressure cabin 4, the fan 1 is arranged above the balance cabin 3, a connecting section 2 is connected between the balance cabin 3 and the fan 1, the connecting section 2 is a cylinder, the fan 1 is fixed at the top of the connecting section 2, and the bottom of the connecting section 2 is fixed with the top of the balance cabin 3. The balance cabin 3 is a circular truncated cone with the diameter of the top larger than that of the bottom; the pressure chamber 4 is a disc; the bottom surface of the connecting section 2 is attached to the top surface of the balance cabin 3, and the diameter of the top of the balance cabin 3 is larger than that of the connecting section 2; the bottom surface of the balance cabin 3 is attached to the top surface of the pressure cabin 4, the diameter of the pressure cabin 4 is larger than that of the bottom of the balance cabin 3, the central axes of the connecting section 2, the balance cabin 3 and the pressure cabin 4 coincide, the balance cabin 3 is of a hollow structure, and the pressure cabin 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-balance performance under any water depth condition.

The invention can be connected with floating fans of any type through the connecting section 2. The connecting section 2 is used for connecting the floating fan 1 at the upper part with the balance cabin 3 at the lower part, the diameter of the connecting section 2 is slightly larger than the diameter of the bottom of the floating fan 1, and the smallest connecting 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 balance 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 balance cabin with the same volume and the same height, the circular truncated cone type balance cabin obviously improves the floating center of the floating fan platform.

In the present invention, the pressure chamber 4 of the platform is provided separately. Arranged below the equalization tank 3 is a pressure tank 4 of solid construction, unlike a floating platform without pressure tanks, so that the centre of gravity of the platform is lowered. The increased distance between the center of gravity and the floating center reduces the required weight of the pressure chamber 4 and thus the economic cost of construction of the pressure chamber 4, while ensuring the same stability.

According to the disc-shaped pressure chamber, the vertical damping and the pitch damping of the platform are increased through the shape of the pressure chamber, and the heave response and the pitch response of the platform are reduced.

In the invention, the used mooring mode is catenary mooring, a reserved hole for installing a mooring line is arranged at the edge of the bottom of the pressure chamber, one end of the mooring line of the mooring system 5 is fixed at the bottom of the pressure chamber 4, and the other end of the mooring line 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 connecting section 2, the balance cabin 3 and the pressure cabin 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 F_wThe maximum wind-leaning moment of the fan 1 is M_wThe distance between the gravity center of the fan and the bottom of the tower column is H₄The inclination angle of the floating fan platform is alpha, and the distance from the integral floating core of the floating fan platform to the bottom of the balance cabin 3 is PK; as shown in FIG. 3, the connecting section 2 has a height H₁The height of the balance cabin 3 is H₂Total mass m of floating fan platform₁Satisfies the following conditions:

where ρ is_cIs the density of the concrete, rho_wIs the density of seawater;

height H of connecting section 2₁Satisfies the following conditions:wherein h is_fIs the heave amplitude of the floating fan platform;

diameter D of the connecting section 2₁Is larger than the diameter of the bottom of the fan;

height H of the balance cabin 3₂The safety of the platform under extreme environmental load is ensured, 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 h_fA reserved safe distance of 0.25h and a vertical change height h when the pressure chamber inclines_kSum, therefore, H should be satisfied₂≤h-H₁-H₃-h_f-h_k0.25h, wherein h_k＝0.5D₂sinα。

D₂Is the diameter of the pressure chamber 4, H₃The height of the pressure chamber 4; diameter d of top of balance cabin 3₁And diameter d of the bottom₂The ratio of Q; diameter D of pressure tank₂Height H₃And natural frequency of pitch of the vessel:

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 then a design scheme with smaller platform natural frequency is selected as an alternative scheme, namely the diameter D of the concrete pressure chamber 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.