阅读说明：本技术 海上风电多桩基础 (Offshore wind power multi-pile foundation ) 是由 邱旭 尹铁男 卢坤鹏 王海明 张育钧 张万雄 于 2021-09-16 设计创作，主要内容包括：本发明公开一种海上风电多桩基础,所述海上风电多桩基础包括多个桩基础、承台和风机,多个桩基础间隔排布,每个桩基础的顶端与承台的底部相连,多个桩基础的底端的中心位于同一水平面上,且沿第一椭圆的圆周分布,风机安装在承台的顶部,风机包括叶轮,叶轮的旋转中心线的延伸方向为第一方向,第一椭圆的长轴沿第一方向延伸。本发明的海上风电多桩基础具有结构简单、桩基础稳固、使用寿命长等优点。(The invention discloses an offshore wind power multi-pile foundation which comprises a plurality of pile foundations, a bearing platform and a fan, wherein the pile foundations are arranged at intervals, the top end of each pile foundation is connected with the bottom of the bearing platform, the centers of the bottom ends of the pile foundations are positioned on the same horizontal plane and are distributed along the circumference of a first ellipse, the fan is installed at the top of the bearing platform and comprises an impeller, the extending direction of the rotating center line of the impeller is a first direction, and the long axis of the first ellipse extends along the first direction. The offshore wind power multi-pile foundation has the advantages of simple structure, stable pile foundation, long service life and the like.)

1. An offshore wind power multi-pile foundation, comprising:

the pile foundations are arranged at intervals;

the top end of each pile foundation is connected with the bottom of the bearing platform, and the centers of the bottom ends of the pile foundations are positioned on the same horizontal plane and distributed along the circumference of a first ellipse;

the fan is installed at the top of the bearing platform and comprises an impeller, the extending direction of the rotating center line of the impeller is a first direction, and the long axis of the first ellipse extends along the first direction.

2. The offshore wind power multi-pile foundation of claim 1, wherein the pile foundation extends downwardly from the bottom of the cap and in a direction away from the central axis of the cap.

3. Offshore wind power multi-pile foundation according to claim 1 or 2, wherein the centers of the top ends of a plurality of said pile foundations are located on the same horizontal plane and are distributed along the circumference of a second ellipse, the major axis of said second ellipse extending in said first direction.

4. The offshore wind power multi-pile foundation of claim 3, wherein the eccentricity of the first ellipse and the second ellipse is equal, and the projections of the center of the first ellipse and the center of the second ellipse on the horizontal plane coincide.

5. Offshore wind power multi-pile foundation according to claim 1 or 2, characterized in that the projection of the first ellipse on the horizontal plane surrounds the projection of the cap on the horizontal plane.

6. Offshore wind power multi-pile foundation according to claim 1, characterized in that the outer circumferential profile of the cross-section of the cap is oval and the major axis of the oval extends in the first direction.

7. Offshore wind power multi-pile foundation according to claim 6, wherein the cap is an elliptical cylinder and the central axis of the cap extends in a vertical direction.

8. The offshore wind power multi-pile foundation of claim 1, further comprising a tower mounted on top of the bearing platform, the wind turbine being mounted on top of the tower.

9. An offshore wind power multi-pile foundation according to claim 1 or 2, characterised in that the angle between the centre axis of the pile foundation and the horizontal plane is 30-90 °.

10. Offshore wind power multi-pile foundation according to claim 1 or 2, characterized in that the pile foundations comprise a first and a second pile foundation opposite on the major axis of the first ellipse.

Technical Field

The invention relates to the technical field of offshore wind power, in particular to an offshore wind power multi-pile foundation.

Background

Wind energy is increasingly regarded by human beings as a clean and harmless renewable energy source. Compared with land wind energy, offshore wind energy resources not only have higher wind speed, but also are far away from a coastline, are not influenced by a noise limit value, and allow the unit to be manufactured in a larger scale.

The offshore wind power foundation is a key place for supporting the whole offshore wind power machine, the cost accounts for 20-25% of the investment of the whole offshore wind power, the offshore wind power foundation generally requires the service life of more than 20 years, but because a fan of the offshore wind power foundation needs to bear the wind force in the main wind direction, the force received by the fan is downwards transmitted to the pile foundation, the wind force borne by the pile foundation is much larger than the force of water flow waves, so that the problems that the pile foundation is unstable, the pile foundation inclines and is even knocked down are easily caused, and the service life of the offshore wind power foundation is seriously influenced.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides an offshore wind power multi-pile foundation which is stable in structure, strong in wind resistance and low in cost.

The offshore wind power multi-pile foundation according to the embodiment of the invention comprises: the pile foundations are arranged at intervals; the top end of each pile foundation is connected with the bottom of the bearing platform, and the centers of the bottom ends of the pile foundations are positioned on the same horizontal plane and distributed along the circumference of a first ellipse; the fan is installed at the top of the bearing platform and comprises an impeller, the extending direction of the rotating center line of the impeller is a first direction, and the long axis of the first ellipse extends along the first direction.

According to the offshore wind power multi-pile foundation provided by the embodiment of the invention, the stability of the offshore wind power multi-pile foundation is improved through the arrangement of the pile foundations, the offshore wind power single-pile foundation is prevented from being inclined or rushed down due to the influence of the sea wind, and the service life of the offshore wind power single-pile foundation is prolonged.

In some embodiments, the pile foundation extends downwardly from a bottom of the cap and in a direction away from a central axis of the cap.

In some embodiments, the centers of the top ends of a plurality of pile foundations are located on the same horizontal plane and distributed along the circumference of a second ellipse, and the long axis of the second ellipse extends along the first direction.

In some embodiments, the eccentricity of the first ellipse is equal to the eccentricity of the second ellipse, and the projections of the center of the first ellipse and the center of the second ellipse on the horizontal plane coincide.

In some embodiments, the projection of the first ellipse on a horizontal plane surrounds the projection of the cap on the horizontal plane.

In some embodiments, the peripheral profile of the cross-section of the platform is elliptical, and the major axis of the ellipse extends in the first direction.

In some embodiments, the platform is an elliptical cylinder and the central axis of the platform extends in a vertical direction.

In some embodiments, the offshore wind power multi-pile foundation further comprises a tower mounted on top of the bearing platform, and the wind turbine is mounted on top of the tower.

In some embodiments, the central axis of the pile foundation is at an angle of 30 ° to 90 ° to the horizontal.

In some embodiments, the pile foundations comprise first and second pile foundations that are opposite on the major axis of the first ellipse.

Drawings

Fig. 1 is a schematic structural diagram of an offshore wind power multi-pile foundation according to an embodiment of the invention.

Fig. 2 is a front view of an offshore wind power multi-pile foundation according to an embodiment of the invention.

Fig. 3 is a top view of an offshore wind power multi-pile foundation according to an embodiment of the invention.

Fig. 4 is a bottom view of an offshore wind power multi-pile foundation according to an embodiment of the invention.

Reference numerals:

an offshore wind power multi-pile foundation 100;

pile foundations 1; a bearing platform 2; a tower drum 3; a first ellipse 4; a second ellipse 5;

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring now to fig. 1-4, an offshore wind power multi-pile foundation 100 according to an embodiment of the present invention is described, comprising a plurality of pile foundations 1, a cap 2 and a wind turbine (not shown).

A plurality of pile foundations 1 are arranged at intervals. As can be seen by those skilled in the art, the conventional pile foundations 1 are hollow cylindrical structures, and the sea bed surface is the interface between seawater and underwater sand. One part of the pile foundation 1 is positioned in the sea water above the sea bed surface, and the other part of the pile foundation 1 is buried in the sand below the sea bed surface, so that the pile foundation 1 is fixed on the sea.

The top end of each pile foundation 1 is connected with the bottom of the bearing platform 2, and the centers of the bottom ends of the pile foundations 1 are positioned on the same horizontal plane and distributed along the circumference of the first ellipse 4. Specifically, as shown in fig. 1, a plurality of pile foundations 1 are arranged on the lower end face of a bearing platform 2 at intervals along the circumferential direction of the bearing platform 2, the upper ends of the plurality of pile foundations 1 are connected with the bearing platform 2, and the lower ends of the plurality of pile foundations 1 are arranged at intervals along the direction of a first ellipse 4 along the center of the face.

The fan is arranged on the top of the bearing platform 2 and comprises an impeller, the extending direction of the rotating center line of the impeller is a first direction, and the long axis of the first ellipse 4 extends along the first direction. Specifically, the first direction is defined as a main wind direction, the rotation center line direction of the impeller extends toward the main wind direction, and the major axis of the first ellipse 4 extends in the wind direction of the main wind direction.

According to the offshore wind power multi-pile foundation 100 provided by the embodiment of the invention, the plurality of pile foundations 1 are arranged along the direction of the first ellipse 4, the ellipse shape has a bias current line type, the impact effect of fluid on the surface of the pile foundations 1 can be more effectively reduced than that of a common circle shape, the stability of the pile foundations 1 arranged in the ellipse shape is stronger, the impact force of stronger sea wind can be borne, the pile foundations 1 are prevented from inclining or falling under the impact force of the sea wind, and the service life of the offshore wind power multi-pile foundation 100 is prolonged.

According to the offshore wind power multi-pile foundation 100 provided by the embodiment of the invention, the long axis of the first ellipse 4 extends along the first direction, so that the long axis of the ellipse is consistent with the main wind direction, the impact of the main wind direction on the pile foundation 1 can be reduced, and the stability of the pile foundation 1 is ensured.

In some embodiments, the pile foundation 1 extends from the bottom of the cap 2 downwards and in a direction away from the central axis of the cap 2. Specifically, as shown in fig. 3-4, the central axes of the multiple pile foundations 1 extend outward along the inside and outside directions of the bearing platform 2, so that the multiple pile foundations can be conveniently inserted into gravels buried below the surface of the sea bed, and the stability of the offshore wind power multiple pile foundation 100 is improved.

In some embodiments, the centers of the top ends of the pile foundations 1 are located on the same horizontal plane and distributed along the circumference of the second ellipse 5, and the major axis of the second ellipse 5 extends in the first direction. Specifically, as shown in fig. 1, the upper ends of the plurality of pile foundations 1 are arranged at intervals along the center of the plane in the direction of the second ellipse 5, so that the plurality of pile foundations 1 are arranged in an ellipse by the first ellipse 4 and the second ellipse 5.

In some embodiments, the eccentricities of the first ellipse 4 and the second ellipse 5 are equal, and the projections of the center of the first ellipse 4 and the center of the second ellipse 5 on the horizontal plane coincide. Specifically, as shown in fig. 4, the ratio of the semi-focal length to the semi-major axis of the first ellipse 4 is equal to the ratio of the semi-focal length to the semi-major axis of the second ellipse 5, that is, the first ellipse 4 and the second ellipse 5 are similar ellipses, so that the difficulty in mounting and manufacturing the offshore wind power multi-pile foundation 100 is reduced, and the pit sea wind impact capability of the offshore wind power multi-pile foundation 100 is improved.

In some embodiments, the projection of the first ellipse 4 in the horizontal plane surrounds the projection of the platform 2 in the horizontal plane. Specifically, as shown in fig. 3 to 4, in the projection plane orthogonal to the up-down direction, the projection of the platform 2 in the projection plane is located in the first ellipse 4, so that the arrangement of the offshore wind power multi-pile foundation 100 is more reasonable.

In some embodiments, the peripheral profile of the cross-section of the platform 2 is elliptical, with the major axis of the ellipse extending in a first direction. Specifically, as shown in fig. 1 to 4, the long axis of the bearing platform 2 extends along the main wind direction, so that the stability of the offshore wind power multi-pile foundation 100 is further improved, and the capability of the offshore wind power multi-pile foundation 100 for resisting sea wind impact is improved.

In some embodiments, the platform 2 is an elliptical cylinder, and the central axis of the platform 2 extends in a vertical direction (up and down as shown in fig. 1-2). Therefore, the bearing platform 2 has certain stability and the capability of pit sea wind impact, and the design of the bearing platform 2 is more reasonable.

In some embodiments, the offshore wind power multi-pile foundation 100 further comprises a tower 3, the tower 3 is mounted on the top of the bearing platform 2, and the wind turbine is mounted on the top end of the tower 3. Specifically, tower section of thick bamboo 3 is established on the up end of cushion cap 2, and the fan passes through tower section of thick bamboo 3 and installs on cushion cap 2 to the installation manufacturing degree of difficulty of fan has been reduced.

In some embodiments the centre axis of the pile foundation 1 is at an angle of 30-90 ° to the horizontal. Specifically, the included angle between the central axis of the pile foundation 1 and the horizontal plane may be any one of angles of 30 °, 45 °, 60 °, 75 °, 80 °, 85 °, and 90 °.

In some embodiments, the major axis of the first ellipse 4 extends in the wind direction of the main wind direction, so that the major axis direction of the first ellipse 4 is subjected to a large impact force by the sea wind, and therefore, in some embodiments, the pile foundation 1 includes the first pile foundation 1 and the second pile foundation 1 opposite to each other on the major axis of the first ellipse 4. Specifically, as shown in fig. 1 to 4, the first pile foundation 1 is arranged at the left end of the first ellipse 4, and the second pile foundation 1 is arranged at the right end of the first ellipse 4, thereby further improving the stability and the pit wind impact capability of the offshore wind power multi-pile foundation 100.

In some embodiments, the ratio of the length of the major axis to the length of the minor axis of the first ellipse 4 is greater than 1 and less than or equal to 5.

In some embodiments, the length of the major axis of the first ellipse 4 is 10m to 80m, and the length of the minor axis of the first ellipse 4 is 2m to 80m, specifically, the length of the major axis of the first ellipse 4 may be selected from: 2m, 10m, 20m, 30m, 40m, 50m, 60m, 70m, 80 m. The length of the minor axis of the first ellipse 4 may be selected to be any one of 2m, 10m, 20m, 30m, 40m, 50m, 60m, 70m, 80 m.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.