CN214464682U

CN214464682U - Semi-submersible offshore wind turbine unit, foundation and heave plate

Info

Publication number: CN214464682U
Application number: CN202023309198.1U
Authority: CN
Inventors: 周昳鸣; 郭小江; 穆延非; 闫姝; 张波; 邱旭; 杭兆峰; 姚晖; 张宇; 王威崴; 杨立华; 刘立勋; 唐程; 李鑫鑫
Original assignee: Huaneng Yancheng Dafeng New Energy Power Generation Co ltd; Jiangsu Cleaning Energy Branch Of Huaneng Power Intl Inc; Huaneng Clean Energy Research Institute; Huaneng Offshore Wind Power Science and Technology Research Co Ltd
Current assignee: Huaneng Yancheng Dafeng New Energy Power Generation Co ltd; Jiangsu Cleaning Energy Branch Of Huaneng Power Intl Inc; Huaneng Clean Energy Research Institute; Huaneng Offshore Wind Power Science and Technology Research Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-10-22
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a semi-submersible offshore wind turbine unit, a foundation and a heave plate, wherein a plurality of through holes are uniformly arranged along the circumferential direction of the heave plate, and the semi-submersible wind turbine foundation comprises the heave plate and a main buoy; the heave plate adopts the heave plate of claim 1, the heave plate is coaxially arranged at the bottom of the main buoys, at least three main buoys are arranged, and inclined struts and cross struts are arranged between the two main buoys; the utility model discloses reduced the quality of swinging the board after flagging on swinging the board trompil to increased the wet area of structure outward flange profile and water contact, consequently the utility model provides a semi-submerged formula fan basis of trompil swing extra hydrodynamic damping that the board can provide, increase the additional mass of overall structure, effectively improve the motion performance of floating formula fan.

Description

Semi-submersible offshore wind turbine unit, foundation and heave plate

Technical Field

The utility model belongs to the technical field of power generation steel pylon design, concretely relates to half submerged formula offshore wind turbine unit, basis and hang down swing plate.

Background

With the continuous expansion of the development of wind energy resources, especially the development in deep sea, the research on the floating wind turbine is paid more attention. Common floating foundations include Spar foundations, TLP foundations, semi-submersible foundations, and the like. At shallower coastal water depth, the water depth applicability of the platform and the manufacturing cost of the mooring structure are considered, and the semi-submersible fan foundation is widely concerned by the advantages of good stability, manufacturability, convenience for wet towing installation and the like.

In general, the semi-submersible platform needs to design the size of a main buoy to be larger, and the heaving inherent cycle is ensured to be far larger than the wave cycle by means of heavy draught. The heave plate is arranged under the main buoy of the semi-submersible platform, so that the platform can be prevented from resonating with waves, and the platform has good motion performance. The additional mass of the heave plate can increase the heave natural oscillation period of the platform and enable the heave natural oscillation period to be far away from a wave energy concentration frequency band; the provided additional damping can effectively reduce the dynamic response of the platform and improve the motion performance of the platform.

As shown in fig. 1, most of the heave plates (5) of the existing semi-submersible fan bases are complete circular plate structures, have large mass, and have small wet area of the outer edge profile of the structure contacting water, so that the additional hydrodynamic damping and the additional mass are small, and the function of the heave plates is not well exerted.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art, the utility model provides a hang down and swing board for semi-submerged formula fan basis considers the symmetry of structure and the homogeneity of atress, hangs down at semi-submerged formula fan and swings and carry out even trompil on the board, reduces the weight of structure, increases and hangs down hydrodynamic damping and the additional mass of swinging the board when the up-and-down motion to the stability on floating fan basis has been improved.

In order to realize the purpose, the utility model discloses a technical scheme is: a heave plate for a semi-submersible fan foundation is uniformly provided with a plurality of through holes along the circumferential direction of the heave plate.

The number of vias is 8n, n =1,2, … 16; and 8 through holes are formed in the same circumference, and when n is more than or equal to 2, the through holes in two adjacent circles are arranged in a staggered mode.

When n =1, the radius of the circumference of the through hole is r1=0.25 × D2+0.25 × D1, D1 is the diameter of the main pontoon, and D2 is the diameter of the heave plate.

When n =2, the through holes are formed along two circumferences of the heave plate, the through holes on the two circles are arranged in a staggered mode, r1-D1/2= r2-r1 ', r2 is larger than r 1', and r2 is the radius of the circle where the through hole with the center located at the excircle is located.

When n =3, the through holes are formed along three circumferences of the heave plate, the through holes on two adjacent circles are arranged in a staggered mode, r3 is greater than r2 '> r 1', r1 'is the radius of the circle where the through hole with the center located at the inner ring is located, r3 is the radius of the circle where the through hole with the center located at the outer ring is located, and r 2' is the radius of the circle where the through hole between the inner ring and the outer ring is located.

The thickness is 25-60mm, and the diameter is 1.5-2 m larger than the diameter of the float bowl.

The semi-submersible type fan foundation comprises a heave plate and a main buoy; hang down and swing the board and adopt the board, hang down and swing the coaxial setting of board in main flotation pontoon bottom, main flotation pontoon is provided with threely at least, sets up bracing and stull between two main flotation pontoons.

The surfaces of the main buoy, the inclined strut, the cross strut and the heave plate are all provided with anti-corrosion layers.

The ratio of the diameter of the main buoy to the diameter of the heave plate is not less than 1.2.

The utility model provides an offshore wind turbine of semi-submerged formula, adopts semi-submerged formula fan foundation, pylon setting are on semi-submerged formula fan foundation's central axis, and the pylon passes through bracing and stull with main flotation pontoon and is connected.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

the utility model discloses reduced the quality of swinging the board after flagging on swinging the board trompil to increased the wet area of structure outward flange profile and water contact, consequently the utility model provides a semi-submerged formula fan basis of trompil swing extra hydrodynamic damping that the board can provide, increase the additional mass of overall structure, effectively improve the motion performance of floating formula fan.

Drawings

The above and other features and advantages of the present invention will become more apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings, wherein:

fig. 1 is a schematic diagram of a prior art floating wind turbine foundation.

FIG. 2 is a schematic diagram of a semi-submersible fan foundation main pontoon and an 8-hole heave plate structure.

Fig. 3 is a schematic front view of a floating type fan foundation main pontoon and an 8-hole heave plate.

Fig. 4 is a side view of the main pontoon and the 8-hole heave plate of the floating fan base.

Fig. 5 is a schematic top view of the floating fan foundation main pontoon and the 24-hole heave plate.

FIG. 6 is a top view of the floating fan foundation main pontoon and the 16-hole heave plate.

Fig. 7 is a schematic bottom view of the floating fan foundation main pontoon and the 24-hole heave plate.

In the attached drawing, 1 is a main buoy, 2 is a tower frame, 3 is an inclined strut, 4 is a cross strut, 5 is a heave plate and 6 is a through hole.

Detailed Description

The invention will be described in detail below with reference to fig. 1,2, 3, 4 and 5, in which exemplary embodiments of the invention are shown.

Referring to fig. 2, the heave plate for a semi-submersible fan foundation provided by the present invention is uniformly provided with a plurality of through holes 6 along the circumferential direction; the number of vias 6 is 8n, n =1,2, … 16; and 8 through holes 6 are formed in the same circumference, and when n is more than or equal to 2, the through holes in two adjacent circles are arranged in a staggered mode.

When n =1, the radius of the circumference where the through hole 6 is located is r1=0.25 × D2+0.25 × D1, D1 is the diameter of the main pontoon, and D2 is the diameter of the heave plate 5.

When n =2, the through holes 6 are opened along two circumferences of the heave plate 5, the through holes 6 on the two circles are arranged in a staggered mode, r1-D1/2= r2-r1 ', r2 > r 1', and r2 is the radius of the circle where the through hole 6 with the center located at the excircle is located.

When n =3, the through holes 6 are opened along three circumferences of the heave plate, the through holes 6 on two adjacent circles are arranged in a staggered manner, r3 is more than r2 '> r 1', r1 'is the radius of the circle where the through hole 6 with the center located at the inner circle is located, r3 is the radius of the circle where the through hole 6 with the center located at the outer circle is located, and r 2' is the radius of the circle where the through hole 6 between the inner circle and the outer circle is located.

The semi-submersible fan foundation comprises a heave plate 5 and a main buoy 1; hang down and swing board 5 and adopt the board, hang down and swing board 5 coaxial setting in 1 bottoms of main flotation pontoon, main flotation pontoon is provided with threely at least, sets up bracing 3 and stull 4 between two main flotation pontoons.

The surfaces of the main buoy 1, the inclined strut 3, the cross strut 4 and the heave plate 5 are all provided with anti-corrosion layers.

The ratio of the diameter of the main buoy 1 to the diameter of the heave plate 5 is not less than 1.2.

As shown in fig. 1, the utility model provides a semi-submerged formula fan basis of trompil, including main flotation pontoon 1, pylon 2, bracing 3, stull 4, hang down to swing board 5, hang down to swing the board and establish through-hole 6 along its circumferencial direction, the diameter of main flotation pontoon 1 is D1, and the diameter that hangs down to swing board 5 is D2, and main flotation pontoon is unanimous with the centre of a circle O that hangs down the board. 8 through holes 6 are uniformly formed on a circle which is r1 away from the center O, namely the distance from the center of the through hole 6 to the center of the main buoy 1 is r1, and the radian corresponding to the arc between the centers of two adjacent through holes 6 on the same circumference is pi/4. In general terms:

r1=0.25×D2+0.25×D1

the through holes 6 on the heave plate plane are uniformly distributed round holes, and the number and the diameter of the through holes can be adjusted according to specific application scenes. For example, FIGS. 6 and 7 show real-time examples of the floating wind turbine foundation main pontoon and 16 through-holes and 24 through-holes,

holes are uniformly formed in the heave plate, and the number and the positions of the through holes 6 can be adjusted according to specific project requirements.

Fig. 2 is a drawing of a structure of the 8-hole heave plate of the semi-submersible fan foundation, and fig. 3, 4 and 5 are a front view, a side view and a top view of the 8-hole heave plate of the semi-submersible fan foundation respectively. As can be seen from the figure, the distance from the center of the through hole 6 to the center of the main buoy 1 is r1, and the included angle between two adjacent holes is 45 °. In general terms: r1=0.25 × D2+0.25 × D1

Fig. 6 shows a top view of the semi-submersible fan foundation 16-hole heave plate, the distance between the center of the through hole 6 and the center of the main buoy 1 is r1 and r2, r2 is greater than r1, and the radian corresponding to the arc between the centers of two adjacent through holes 6 on the same circumference is pi/4. In general terms:

r1-D1/2=r2-r1

fig. 7 shows a top view of the 24-hole heave plate of the semi-submersible fan foundation, the distance from the center of the through hole 6 to the center of the main buoy 1 is r1, r2 and r3, r3 is greater than r2 is greater than r1, and the radian corresponding to the arc between the centers of two adjacent through holes 6 on the same circumference is pi/4.

Because reduced the quality of swinging the board behind the trompil to increased the wet area of structure outward flange profile and water contact, consequently the utility model provides a semi-submerged formula fan basis of trompil swing extra hydrodynamic damping that the board can provide, increase the additional quality of whole structure, effectively improve the motion performance of floating the formula fan.

The utility model discloses during the concrete implementation, will semi-submersible fan basis is used for the offshore wind turbine of semi-submersible, and pylon 2 sets up on the central axis on semi-submersible fan basis, and pylon 2 is connected through bracing 3 and stull 4 with main flotation pontoon 1.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Claims

1. A heave plate of a semi-submersible fan foundation is characterized in that a plurality of through holes (6) are uniformly formed along the circumferential direction of the heave plate; the number of vias (6) is 8n, n =1,2, … 16; when n is more than or equal to 2, the through holes on two adjacent circles are arranged in a staggered mode, the thickness is 25-60mm, and the diameter is larger than the diameter of the buoy by 1.5-2 m.

2. Heave plate for a semi-submersible wind turbine foundation according to claim 1, characterised in that the radius of the circumference of the through hole (6) is r1=0.25 x D2+0.25 x D1 when n =1, D1 being the diameter of the main pontoon and D2 being the diameter of the heave plate (5).

3. The heave plate for a semi-submersible fan foundation according to claim 1, wherein when n =2, the through holes (6) are arranged along two circumferences of the heave plate (5), the through holes (6) on the two circles are arranged in a staggered manner, and r1-D1/2= r2-r1 ', r2 > r 1', and r2 is the radius of the circle where the through hole (6) with the center at the excircle is located.

4. The heave plate for a semi-submersible fan foundation according to claim 1, wherein when n =3, the through holes (6) are arranged along three circumferences of the heave plate, the through holes (6) on two adjacent circles are arranged in a staggered manner, r3 > r2 '> r 1' ', r 1' 'is the radius of the circle where the through hole (6) with the center located at the inner circle is located, r3 is the radius of the circle where the through hole (6) with the center located at the outer circle is located, and r 2' is the radius of the circle where the through hole (6) between the inner circle and the outer circle is located.

5. The semi-submersible offshore wind turbine foundation is characterized by comprising a heave plate (5) and a main buoy (1); the heave plate (5) adopts the heave plate of claim 1, the heave plate (5) is coaxially arranged at the bottom of the main buoys (1), at least three main buoys are arranged, and an inclined strut (3) and a cross strut (4) are arranged between the two main buoys.

6. Semi-submersible fan foundation according to claim 5, characterised in that the surfaces of the main pontoon (1), the diagonal bracing (3), the cross brace (4) and the heave plate (5) are provided with an anti-corrosion layer.

7. Semi-submersible fan foundation according to claim 5, characterised in that the ratio of the diameter of the main pontoon (1) to the diameter of the heave plate (5) is not less than 1.2.

8. A semi-submersible offshore wind turbine unit, characterized in that the semi-submersible wind turbine foundation according to claim 5 is adopted, the tower (2) is arranged on the central axis of the semi-submersible wind turbine foundation, and the tower (2) is connected with the main buoy (1) through the inclined strut (3) and the cross strut (4).