A structurally robust wind turbine foundation

Abstract

This application discloses a structurally stable wind turbine foundation, belonging to the field of wind turbine technology. It includes a pile body, a cushion layer, and a connecting column. The cushion layer is laid below the pile body, and the connecting column is fixed above the pile body. The pile body, the cushion layer, and the connecting column are all formed by concrete casting, suitable for assembling a wind turbine foundation. It also includes multiple reinforcing components. This structurally stable wind turbine foundation, through the design of limiting components, effectively solves the stress concentration problem at the connection between the wind turbine mounting column and the foundation, significantly improving the stability and safety of the connection and reducing the risk of breakage. The connecting component consists of a first arc-shaped clamping plate and a second arc-shaped clamping plate, which are tightly fixed to the connecting column by expansion bolts. Bolts are also used to firmly connect the clamping plates on both sides. The first and second arc-shaped rubber pads not only provide additional buffer protection at the connection point but also reduce the impact of vibration on the connecting parts.

Description

Technical Field

[0001] This application relates to the field of wind turbine technology, specifically to a structurally stable wind turbine foundation. Background Technology

[0002] A wind turbine is a general-purpose mechanical device that converts mechanical energy into gas flow energy. Its core function is to drive gas flow through blade rotation to achieve ventilation, air exchange, pressurization, or energy conversion. In order for wind turbines to operate stably, they need to be supported by a stable wind turbine foundation. The wind turbine foundation is the core support structure of the wind turbine generator set. Its function is to safely transfer the load of components such as the wind turbine tower, nacelle, and impeller to the ground, ensuring the long-term stable operation of the unit in complex natural environments.

[0003] Traditional wind turbine foundations typically connect the wind turbine tower directly to the foundation. This connection bears significant loads, and under strong winds, bending moments, shear forces, and torques are concentrated at this localized point, leading to stress concentration. Furthermore, the lack of additional restraints at the connection point increases the risk of breakage at the lower end of the wind turbine tower. Therefore, a structurally robust wind turbine foundation design is needed to address these issues.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a structurally stable wind turbine foundation, thereby addressing the problem that the connection between the wind turbine foundation and the wind turbine tower is not further restrained, which could lead to the risk of breakage at the lower end of the wind turbine tower connection.

[0006] The technical solution adopted by this application to solve its technical problem is: a wind turbine foundation with a stable structure, including a pile body, a cushion layer and a connecting column. The cushion layer is laid below the pile body, and the connecting column is fixed above the pile body. The pile body, the cushion layer and the connecting column are all formed by concrete pouring, which is suitable for forming a wind turbine foundation. It also includes multiple reinforcing components, which are arranged in a ring on the pile body to reinforce the connection between the pile body and the soil layer.

[0007] A limiting component is installed at the upper end of the connecting column and is suitable for limiting the connection between the tower on the wind turbine and the connecting column.

[0008] Furthermore, the limiting component includes a first arc-shaped clamping plate and a second arc-shaped clamping plate installed on both sides of the connecting column. The first arc-shaped clamping plate and the second arc-shaped clamping plate are fixed to the connecting column by expansion bolts. The two sides of the first arc-shaped clamping plate and the second arc-shaped clamping plate are fixedly installed by bolts, which is suitable for reinforcing the mounting column of the fan.

[0009] Furthermore, a first arc-shaped rubber pad and a second arc-shaped rubber pad are respectively fixed to one side of the first arc-shaped clamping plate and the second arc-shaped clamping plate.

[0010] Furthermore, the reinforcement component includes a steel plate, reinforcing bars, and steel rings. Multiple reinforcing bars are distributed in a ring and fixed to the steel plate by welding. Multiple steel rings are fixed to the outer wall of the reinforcing bars by welding and are formed by concrete casting, which is suitable for increasing the contact area between the wind turbine foundation and the soil layer.

[0011] Furthermore, an upper anchor plate and a lower anchor plate are respectively provided at both ends of the connecting column, and multiple prestressed anchor bolts are distributed in a ring between the upper anchor plate and the lower anchor plate.

[0012] Furthermore, drainage pipes are laid inside the pile body and the connecting column.

[0013] Furthermore, the upper part of the connecting column is provided with a recessed groove, the recess of which corresponds to the inlet of the drain pipe.

[0014] The beneficial effects of this application are as follows: The wind turbine foundation provided by this application has effectively solved the stress concentration problem at the connection between the wind turbine mounting column and the foundation through the design of the limiting component, which significantly improves the stability and safety of the connection and reduces the risk of breakage. The connection component consists of a first arc-shaped clamping plate and a second arc-shaped clamping plate, which are tightly fixed to the connecting column by expansion bolts, and the clamping plates on both sides are firmly connected by bolts. The setting of the first arc-shaped rubber pad and the second arc-shaped rubber pad not only provides additional buffer protection for the connection and reduces the impact of vibration on the connection, but also absorbs the small displacement during wind turbine operation to a certain extent through its elastic characteristics, further enhancing the stability and durability of the connection. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0016] In the attached diagram:

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the installation of a structurally stable wind turbine foundation according to an embodiment of this application;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of a wind turbine base limiting component according to an embodiment of this application;

[0019] Figure 3 This is a cross-sectional three-dimensional structural schematic diagram of a structurally stable wind turbine foundation pile according to an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the internal three-dimensional structure of a structurally stable wind turbine foundation pile according to an embodiment of this application;

[0021] Figure 5 This is a three-dimensional structural diagram of the lower part of a wind turbine foundation pile according to an embodiment of this application.

[0022] The following are the labeling elements in the figure:

[0023] 1. Pile body; 2. Cushion layer; 3. Connecting column; 4. Reinforcing component; 5. First arc-shaped clamping plate; 6. Second arc-shaped clamping plate; 7. Expansion bolt; 8. First arc-shaped rubber pad; 9. Second arc-shaped rubber pad; 10. Steel plate; 11. Reinforcing bar; 12. Steel ring; 13. Upper anchor plate; 14. Lower anchor plate; 15. Prestressed anchor bolt; 16. Drainage pipe; 17. Groove. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] like Figure 1 - Figure 5 As shown, this application provides a structurally stable wind turbine foundation, which includes a pile body 1, a cushion layer 2, and a connecting column 3. The cushion layer 2 is laid below the pile body 1, and the connecting column 3 is fixed above the pile body 1. The pile body 1, the cushion layer 2, and the connecting column 3 are all formed by concrete pouring, which is suitable for forming a wind turbine foundation. It also includes multiple reinforcing components 4, which are arranged in a ring on the pile body 1, which is suitable for reinforcing the connection between the pile body 1 and the soil layer.

[0027] A limiting component is installed at the upper end of the connecting column 3, which is suitable for limiting the connection between the tower on the wind turbine and the connecting column 3.

[0028] The pile body 1 is a frustum shape with a diameter of 22 meters and a depth of 3 meters to ensure it penetrates into a stable soil layer. It is poured with C40 high-strength concrete to ensure that the pile body has sufficient compressive and tensile strength. The reinforcement components 4 are distributed in a ring at the bottom of the pile body 1. Part of the reinforcement components 4 is inside the pile body 1 and part is at the bottom of the pile body 1. Each reinforcement component is welded from steel plate 10, steel bar 11 and steel ring 12 to form a grid structure. It is then poured with concrete and integrated with the pile body, increasing the contact area between the foundation and the soil layer.

[0029] The cushion layer 2 is a flat cylindrical shape, laid under the pile body, with a thickness of 0.1 meters. It is made of a mixture of crushed stone and sand, which has good compaction and drainage properties. It is used to distribute the load transmitted by the superstructure and reduce the local pressure on the foundation.

[0030] The connecting column 3 is cylindrical in shape and fixed above the pile body. It has a diameter of 6 meters and a height of 4 meters. It is also made of C40 high-strength concrete. The limiting component is installed on the upper end of the connecting column 3 to buffer the vibration and small displacement of the wind turbine during operation.

[0031] like Figure 3 As shown, the limiting assembly includes a first arc-shaped clamping plate 5 and a second arc-shaped clamping plate 6 installed on both sides of the connecting column 3. The first arc-shaped clamping plate 5 and the second arc-shaped clamping plate 6 are fixed to the connecting column 3 by expansion bolts 7. The first arc-shaped clamping plate 5 and the second arc-shaped clamping plate 6 are fixedly installed on both sides by bolts, which is suitable for reinforcing the mounting column of the fan.

[0032] The limiting component consists of a first arc-shaped clamping plate 5 and a second arc-shaped clamping plate 6. The arc-shaped design conforms to the shape of the fan mounting column. The clamping plates are made of Q345B steel, which has high strength and toughness. The surface is treated with anti-rust and is tightly fixed to the connecting column by expansion bolts 7. The clamping plates are fixed on both sides by bolts to form a stable limiting for the fan mounting column.

[0033] like Figure 4 As shown, a first arc-shaped rubber pad 8 and a second arc-shaped rubber pad 9 are respectively fixed on one side of the first arc-shaped clamping plate 5 and the second arc-shaped clamping plate 6.

[0034] The first arc-shaped rubber pad 8 and the second arc-shaped rubber pad 9 are made of highly elastic rubber material, which has good cushioning performance. Through its elastic properties, it absorbs the small displacements during the operation of the fan to a certain extent, further enhancing the stability and durability of the connection.

[0035] like Figure 5As shown, the reinforcement component 4 includes a steel plate 10, steel bars 11 and steel rings 12. Multiple steel bars 11 are distributed in a ring and fixed to the steel plate 10 by welding. Multiple steel rings 12 are fixed to the outer wall of the steel bars 11 by welding and are formed by concrete pouring, which is suitable for increasing the contact area between the wind turbine foundation and the soil layer.

[0036] Among them, the steel plate 10, as the main body of the reinforcement component, provides strong tensile and compressive strength; the ring distribution of the steel bars 11 effectively enhances the integrity and shear resistance of the structure; the addition of the steel ring 12 further improves the bonding force between the reinforcement component 4 and the concrete, ensuring the durability of the reinforcement effect. The steel bars 11 are welded to the steel plate in a ring distribution, and the steel ring 12 is welded to the outer wall of the steel bars to form a grid structure, which enhances the bonding force with the concrete.

[0037] like Figure 5 As shown, an upper anchor plate 13 and a lower anchor plate 14 are respectively provided at both ends of the connecting column 3, and multiple prestressed anchor bolts 15 are distributed in a ring between the upper anchor plate 13 and the lower anchor plate 14.

[0038] The connecting column 3 has an upper anchor plate 13, a lower anchor plate 14, and a prestressed anchor bolt 15 embedded inside, which are used to connect the wind turbine tower.

[0039] like Figure 5 As shown, drainage pipes 16 are laid inside the pile body 1 and the connecting column 3;

[0040] The drainage pipe 16 is cylindrical in shape and made of PVC material, which is corrosion-resistant and wear-resistant. It is pre-embedded inside the pile body 1 and the connecting column 3.

[0041] like Figure 5 As shown, the upper part of the connecting column 3 is provided with a recessed groove 17, and the recessed part of the groove 17 corresponds to the water inlet of the drain pipe 16.

[0042] The groove 17 corresponds to the inlet of the drain pipe 16, forming a water collection area. The groove 17 is a conical depression to ensure that the accumulated water can flow smoothly into the drain pipe 16.

[0043] Working principle: First, the wind turbine foundation consists of three core parts: pile body 1, cushion layer 2, and connecting column 3. These three parts are integrally cast with high-strength concrete to form a solid and stable support system.

[0044] As a transition layer between the foundation and the subgrade, the cushion layer 2 can not only effectively disperse the load transmitted from the superstructure and reduce the local pressure on the subgrade, but also adjust the uneven settlement of the subgrade to a certain extent, ensuring the flatness and stability of the foundation.

[0045] The pile 1 extends deep into the ground. Through its massive volume and the high strength of concrete, it safely and stably transfers the huge load generated by components such as the wind turbine tower, nacelle, and impeller to the deep foundation, ensuring the stable support of the wind turbine under various operating conditions.

[0046] Among them, the multiple reinforcing components 4 installed in a ring on the pile body 1 are the key to improving the overall stability of the foundation. These reinforcing components are precisely welded from steel plates 10, steel bars 11 and steel rings 12, and then wrapped with concrete to form a high-strength composite structure.

[0047] The limiting component installed at the upper end of the connecting column 3 can ensure the stability of the connection between the fan mounting column and the fan foundation. The component consists of a first arc-shaped clamping plate 5 and a second arc-shaped clamping plate 6, which are tightly fixed to the connecting column 3 by expansion bolts 7, and the clamping plates on both sides are firmly connected by bolts.

[0048] The first arc-shaped rubber pad 8 and the second arc-shaped rubber pad 9 not only provide additional buffer protection for the connection and reduce the impact of vibration on the connection, but also absorb the small displacements during the operation of the fan to a certain extent through their elastic properties, further enhancing the stability and durability of the connection.

[0049] The drainage pipes 16 laid inside the pile body 1 and the connecting column 3 are an important measure to ensure the dryness of the foundation and prevent corrosion. They ensure the effective drainage of water inside the foundation and avoid the erosion and damage of water to the concrete structure.

[0050] The groove 17 on the upper part of the connecting column 3 corresponds to the water inlet of the drain pipe 16, forming a natural water collection area, which allows the accumulated water to flow smoothly into the drain pipe 16, improving drainage efficiency.

[0051] The existence of a drainage system not only extends the service life of the foundation but also reduces later maintenance costs, ensuring the reliable operation of the fan under various environmental conditions.

[0052] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A structurally stable wind turbine foundation, comprising piles (1), a cushion layer (2), and connecting columns (3), wherein the cushion layer (2) is laid below the piles (1), and the connecting columns (3) are fixed above the piles (1), wherein the piles (1), the cushion layer (2), and the connecting columns (3) are all formed by concrete casting, suitable for forming a wind turbine foundation, characterized in that: It also includes multiple reinforcing components (4), which are arranged in a ring on the pile body (1) to reinforce the connection between the pile body (1) and the soil layer; A limiting component is installed at the upper end of the connecting column (3) and is suitable for limiting the connection between the tower on the wind turbine and the connecting column (3).

2. The structurally stable wind turbine foundation according to claim 1, characterized in that: The limiting component includes a first arc-shaped clamp (5) and a second arc-shaped clamp (6) installed on both sides of the connecting column (3). The first arc-shaped clamp (5) and the second arc-shaped clamp (6) are fixed to the connecting column (3) by expansion bolts (7). The first arc-shaped clamp (5) and the second arc-shaped clamp (6) are fixedly installed on both sides by bolts, which is suitable for reinforcing the mounting column of the fan.

3. The structurally stable wind turbine foundation according to claim 2, characterized in that: A first arc-shaped rubber pad (8) and a second arc-shaped rubber pad (9) are respectively fixed on one side of the first arc-shaped clamp (5) and the second arc-shaped clamp (6).

4. A structurally stable wind turbine foundation according to claim 1, characterized in that: The reinforcement component (4) includes a steel plate (10), reinforcing bars (11) and steel rings (12). Multiple reinforcing bars (11) are arranged in a ring and fixed to the steel plate (10) by welding. Multiple steel rings (12) are fixed to the outer wall of the reinforcing bars (11) by welding and are formed by concrete pouring, which is suitable for increasing the contact area between the wind turbine foundation and the soil layer.

5. A structurally stable wind turbine foundation according to claim 1, characterized in that: The connecting column (3) is provided with an upper anchor plate (13) and a lower anchor plate (14) at both ends, and a plurality of prestressed anchor bolts (15) are distributed in a ring between the upper anchor plate (13) and the lower anchor plate (14).

6. A structurally stable wind turbine foundation according to claim 1, characterized in that: Drainage pipes (16) are laid inside the pile body (1) and the connecting column (3).

7. A structurally stable wind turbine foundation according to claim 6, characterized in that: The upper part of the connecting column (3) is provided with a recessed groove (17), and the recessed part of the groove (17) corresponds to the water inlet of the drain pipe (16).

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