A four-sided pyramid type floating offshore wind turbine foundation

Abstract

The utility model aims at providing a four-sided pyramid type floating offshore wind turbine foundation relates to offshore wind power technical field, the design of bottom support makes the bottom support can float on the sea surface through four balanced floats, four columns are used for connecting the bottom support and the wind driven generator together, form the four prism pyramid structure which is small on top and big on bottom, two columns are located in the front of the bottom support, the plane determined by the two columns is perpendicular to the bottom support as the vertical surface, and the wind turbine blade is installed in front of the vertical surface, so that the sea airflow can directly blow on the wind turbine blade without passing through the column, the column can be well avoided to disturb the airflow and affect the wind driven power generation, and the structure of the four prism pyramid makes the inclined surface on both sides perpendicular to the vertical surface, when the airflow blows from the side, can be evenly stressed, can make the whole floating structure more stably float on the sea surface.

Description

Technical Field

[0001] This utility model relates to the technical field of offshore wind power, and in particular to a four-sided conical floating offshore wind turbine foundation. Background Technology

[0002] my country possesses abundant wind energy resources, with exploitable wind energy reserves of approximately 8 billion kW. Of this, onshore wind energy reserves are approximately 3.5 billion kW, and offshore exploitable wind energy reserves are approximately 4.5 billion kW. As of the end of 2024, the country's cumulative installed power generation capacity was approximately 3.35 billion kilowatts, of which wind power capacity was approximately 520 million kilowatts, accounting for about 15.5%. Guided by the "dual carbon" goals, it is imperative to continuously promote the green and low-carbon transformation of energy, accelerate the construction of new power systems, and develop and utilize wind power generation in accordance with local conditions.

[0003] Offshore wind power is a crucial area for renewable energy development and a vital force driving technological advancements and industrial upgrading in wind power. It is no longer merely a substitute or supplementary energy source, but is becoming one of the core pillars of future new power systems. my country possesses abundant offshore wind energy resources, and accelerating the construction of offshore wind power projects is of great significance for actively addressing climate change and transforming the energy structure. Therefore, the National Energy Administration requires further efforts to improve offshore wind power development and construction, and to continuously promote its development.

[0004] Currently, offshore wind turbine foundations include single-column types, which generally have relatively low stability. Semi-submersible foundations improve floating stability to some extent. There are also three-column types, where the overall structure is a truncated triangular prism, with one vertical face and two sloping faces. The wind turbine is installed on the vertical face, and there is an angle between the two sloping faces and the vertical face. The tail column of this type is relatively large, which can significantly impact the wake. Additionally, there is a four-column type, where the overall structure is a truncated triangular prism, with four columns arranged in two groups. These two groups of columns are installed on the front and rear sides of the wind turbine blades, respectively. While this type of foundation offers good stability under stress, the two columns positioned in front of the wind turbine blades can potentially affect the airflow in the direction of the incoming wind, thus impacting the wind turbine's power generation efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a tetrahedral floating offshore wind turbine foundation, improving upon the existing four-column wind turbine foundation. The first two columns form a vertical surface, with the wind turbine blades mounted on the outer side of this surface, placing the blades in front of the four columns and avoiding direct impact on airflow. With the first two columns upright, the two sides of the tetrahedron have equal areas and are perpendicular to the vertical surface. When wind blows from the sides, the lateral forces are relatively stable, making the overall floating wind turbine foundation more stable. The specific technical solution is as follows: A four-sided pyramidal floating offshore wind turbine foundation includes a bottom support, four columns, a turbine mounting platform, and a wind turbine generator. The bottom support and the turbine mounting platform are fixedly connected by the four columns, forming a four-sided pyramidal structure with a smaller top and a larger bottom. Two of the columns are located in front of the bottom support, and the plane defined by these two columns is perpendicular to the bottom support, forming a vertical plane. The wind turbine generator includes wind turbine blades located in front of the vertical plane.

[0006] Furthermore, the bottom support includes a connecting frame, a counterweight float, and four balancing floats. The connecting frame has a quadrilateral structure. The counterweight float is installed at the middle of the connecting frame on the 1 / 4 position of the fan side, and the four balancing floats are installed at the four corners of the connecting frame.

[0007] Furthermore, the upper end of the column is fixedly connected to the unit mounting platform, and the lower end is fixedly connected to the connecting frame.

[0008] Compared with the prior art, the technical solution of this application has the following beneficial effects: The design of the bottom support of this utility model allows it to float on the sea surface under the support of a counterweight float and four balancing floats. The bottom support is connected to the turbine mounting platform by four columns, forming a truncated pyramid structure that is smaller at the top and larger at the bottom. Two of the columns are located in front of the bottom support, and the plane defined by these two columns is perpendicular to the bottom support, forming a vertical surface. The wind turbine blades are installed in front of this vertical surface. This allows the sea airflow to blow directly onto the wind turbine blades without being disturbed by the columns, thus avoiding turbulence caused by the columns and affecting wind power generation. Furthermore, the truncated pyramid structure ensures that the inclined surfaces on both sides are perpendicular to the vertical surface, allowing the airflow to be evenly distributed when it blows from the sides, resulting in a more stable position on the sea surface. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the front structure of this utility model; Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a side view of the structure of this utility model.

[0010] In the diagram: Balance float-1, counterweight float-2, connecting frame-3, column-4, wind turbine generator-5, wind turbine blade-6, unit mounting platform-7. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Example: In this embodiment, current offshore wind turbine foundations include single-column types, which generally have relatively low stability. Semi-submersible foundations improve floating stability to some extent. There are also three-column types, where the overall structure is a truncated triangular prism, with one vertical face and two sloping faces. The wind turbine is installed on the vertical face, and there is an angle between the two sloping faces and the vertical face. The tail column of this foundation is relatively large, which can significantly impact the wake. Additionally, there is a four-column type, where the overall structure is a truncated triangular prism, with four columns arranged in two groups. These two groups of columns are installed on the front and rear sides of the wind turbine blades. While this type of foundation offers good stability under stress, the two columns positioned in front of the wind turbine blades can easily influence the airflow in the direction of the incoming wind, thus affecting the wind turbine's power generation efficiency. Therefore, a tetrahedral floating offshore wind turbine foundation is proposed, which improves upon the existing four-column wind turbine foundation. The first two columns form a vertical surface on which the wind turbine blades are mounted, placing the blades in front of the four columns and preventing them from affecting the airflow trajectory. After the first two columns are placed vertically, the two sides of the tetrahedron have equal area shapes and are perpendicular to the vertical surface. When wind blows from the sides, the sides are stable under force, making the wind turbine foundation more stable. The specific technical solution is as follows: Please see Figure 1-4 A four-sided pyramidal floating offshore wind turbine foundation includes a bottom support, four columns 4, a turbine mounting platform 7, and a wind turbine generator 5. The bottom support and the turbine mounting platform 7 are fixedly connected by the four columns 4 to form a truncated pyramidal structure with a smaller top and a larger bottom. Two of the columns 4 are located in front of the bottom support, and the plane defined by the two columns 4 is perpendicular to the bottom support and is a vertical plane. The wind turbine generator 5 includes wind turbine blades 6 located in front of the vertical plane. In this embodiment, the bottom support includes a connecting frame 3, a counterweight float 2, and four balancing floats 1. The connecting frame 3 has a quadrilateral structure. The counterweight float 2 is installed at the middle of the connecting frame 3 on the 1 / 4 side of the yoke. The four balancing floats 1 are respectively installed at the four corners of the connecting frame 3. The upper end of the column 4 is fixedly connected to the wind turbine 5, and the lower end is fixedly connected to the connecting frame 3. In this embodiment, the design of the bottom support allows it to float on the sea surface using four floating balance floats 1. The bottom support is connected to the turbine mounting platform 7 by four columns 4, forming a truncated pyramid structure that is smaller at the top and larger at the bottom. Two of the columns 4 are located in front of the bottom support, and the plane defined by these two columns 4 is perpendicular to the bottom support, forming a vertical surface. The wind turbine blades 6 are installed in front of this vertical surface. This allows the sea airflow to blow directly onto the wind turbine blades without passing through the columns 4, effectively avoiding turbulence caused by the columns 4 and its impact on wind power generation. Furthermore, the truncated pyramid structure ensures that the inclined surfaces on both sides are perpendicular to the vertical surface, allowing the airflow to be evenly stressed when it blows from the conical side, resulting in a more stable position on the sea surface.

[0013] The preferred embodiments of this utility model disclosed above are only for illustrating the present utility model. The preferred embodiments do not describe all details exhaustively, nor do they limit the utility model to the specific implementations described. Obviously, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize the present utility model. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A four-sided conical floating offshore wind turbine foundation, comprising a bottom support, four columns, a turbine mounting platform, and a wind turbine generator; characterized in that, The bottom support is fixedly connected to the unit mounting platform by four columns, forming a truncated pyramid structure with a smaller top and a larger bottom. Two of the columns are located in front of the bottom support, and the plane defined by these two columns is perpendicular to the bottom support, forming a vertical plane. The wind turbine includes wind turbine blades located in front of the vertical plane.

2. The tetrahedral floating offshore wind turbine foundation according to claim 1, characterized in that, The bottom support includes a connecting frame, a counterweight float, and four balancing floats. The connecting frame is a quadrilateral structure, the counterweight float is installed in the middle of the connecting frame, and the four balancing floats are installed at the four corners of the connecting frame.

3. The tetrahedral floating offshore wind turbine foundation according to claim 2, characterized in that, The upper end of the column is fixedly connected to the unit mounting platform, and the lower end is fixedly connected to the connecting frame.

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