Support structure of a wind turbine tower and wind turbine tower

Abstract

The application belongs to the technical field of fan tower, and particularly relates to a support structure of a fan tower, which comprises a foundation bearing platform arranged at the bottom of a steel tower drum of the fan tower, an annular rib plate for fixing and clamping the steel tower drum of the fan tower, and a support leg obliquely arranged between the annular rib plate and the foundation bearing platform, wherein the support leg comprises two circular pipe columns, and the two circular pipe columns are crossed at the bottom to form a support leg with an inverted triangular structure. According to the application, the complex loads such as bending moment, torque, horizontal force and vertical force conducted by the fan tower are decomposed by the support structure in space segments, so that the bending moment force borne by the support leg circular pipe column can be reduced as much as possible at the top node of the lower support leg, the lower support leg is in an axial stress state as much as possible, the material utilization efficiency is improved, and the material consumption is reduced.

Description

Technical Field

[0001] This application belongs to the field of wind turbine tower technology, specifically relating to a support structure for a wind turbine tower and a wind turbine tower. Background Technology

[0002] In the wind power industry, wind turbines are the main power generation equipment. Wind turbines are usually designed to be very large, and the hub of the turbine is placed at a high height to improve the power generation efficiency. Therefore, a wind turbine tower is installed below the wind turbine to support the wind turbine and increase the height of the hub.

[0003] However, as the size of wind turbines and the height of their hubs increase, the overall fixed support load on the wind turbine towers also increases. Especially when the hub height exceeds 120 meters, how to utilize the special structure of the wind turbine towers to balance support stability has become a problem that needs to be solved. Utility Model Content

[0004] The purpose of this application is to provide a support structure for a wind turbine tower and a wind turbine tower to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this application adopts the following technical solution: a support structure for a wind turbine tower, comprising:

[0006] The foundation platform is set at the bottom of the steel tower of the wind turbine tower, and the steel tower of the wind turbine tower is fixedly connected to the center of the top surface of the foundation platform;

[0007] The annular rib plate that securely clamps the steel tower cylinder of the wind turbine tower;

[0008] A support leg is inclinedly disposed between the annular rib and the foundation platform. The top end of the support leg is fixedly connected to the bottom end of the annular rib, and the bottom end of the support leg is fixedly connected to the foundation platform. The support leg includes two circular tube columns, the bottoms of which intersect to form an inverted triangular structure.

[0009] This application may further include the following technical solution: the annular rib plate includes two annular rings arranged vertically, and a support column is fixedly arranged between the two annular rings.

[0010] This application may further include the following technical solution: at least four support columns are provided, and the four support columns are distributed at equal intervals between the annular rings.

[0011] This application may further include the following technical solution: at least eight support columns are provided, and two of the eight support columns form a support column group. The four support column groups are distributed at equal intervals between the annular rings, and the spacing between the support columns in the same support column group is smaller than the spacing between the support columns in different support column groups.

[0012] This application may further include the following technical solution: a vertical stiffening rib is provided between the two annular rings, and the top and bottom ends of the vertical stiffening rib are respectively fixedly connected to the upper and lower annular rings.

[0013] This application may further include the following technical solution: a steel strand is provided inside the support leg, one end of the steel strand is fixedly connected to the annular rib plate, and the other end is fixedly connected to the foundation platform.

[0014] This application may further include the following technical solution: the inverted triangular structure has four supporting legs, and the bottom of the four supporting legs is provided with a fixing pile, which is fixed to the four corners of the foundation platform.

[0015] This application may further include the following technical solution: multiple fixed columns are arranged in an array along the adjacent two sides of the foundation platform.

[0016] A wind turbine tower includes: a wind turbine head, a steel tower supporting the wind turbine head, and a support structure for fixing the steel tower to the ground, wherein the support structure adopts the support structure of the wind turbine tower described above.

[0017] This application may further include the following technical solution: the bottom end of the steel tower is provided with an inverted truncated cone. Beneficial effects

[0018] This application effectively decomposes the load transmitted from the upper wind turbine by setting a foundation platform, annular ribs and support legs with a specific structure, converting most of the bending moment into axial force of the support legs, improving the utilization efficiency of material properties, and the triangular support legs fully utilize the stability of the triangle, effectively transferring complex loads to the axial force direction of the inclined support legs, giving full play to the advantages of the structural system, and improving stability and reducing costs compared with traditional structural forms. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the support structure and part of the steel tower of the wind turbine tower in this application;

[0020] Figure 2 This is a schematic diagram of the annular rib plate of the wind turbine tower in this application;

[0021] Figure 3This is a schematic diagram of part of the support structure of the wind turbine tower in this application;

[0022] Figure 4 This is another schematic diagram of part of the support structure of the wind turbine tower in this application;

[0023] Figure 5 This is a schematic diagram of another supporting structure and part of the steel tower of the wind turbine tower in this application.

[0024] The attached diagram is labeled as follows: 100, foundation platform; 101, load-bearing platform; 102, fixed column; 200, annular rib; 201, annular ring; 202, support column; 203, vertical stiffening rib; 301, support leg; 302, fixed pile; 400, steel tower. Detailed Implementation

[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0026] The most prominent characteristic of wind turbine loads is that they are transmitted from above, with huge bending moments, long-term vibrations, and the possibility of vibrations in all 360 degrees. Therefore, in order to better adapt to wind turbine loads, a special support structure needs to be designed to improve support strength.

[0027] The embodiments of this application mainly utilize a reasonable structural system to transfer the complex wind turbine load to the bottom concrete foundation platform through the annular ribs and support legs, giving full play to the advantages of the structural system and improving stability and reducing costs compared to traditional structural forms.

[0028] The following will refer to the appendices in the embodiments of this application. Figure 1-5 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] A support structure for a wind turbine tower, comprising:

[0030] The foundation platform 100 is set at the bottom of the steel tower 400 of the wind turbine tower, and the steel tower 400 of the wind turbine tower is fixedly connected to the center of the top surface of the foundation platform 100.

[0031] The annular rib plate 200 of the steel tower cylinder 400 that holds the wind turbine tower is fixedly clamped;

[0032] A support leg 301 is inclinedly disposed between the annular rib 200 and the foundation platform 100. The top end of the support leg 301 is fixedly connected to the bottom end of the annular rib 200, and the bottom end of the support leg 301 is fixedly connected to the foundation platform 100. The support leg 301 comprises two circular tubular columns whose bottoms intersect to form an inverted triangular structure. Through the optimized arrangement of eight inclined support legs 301, several positive and negative triangles are formed, constituting a truncated cone enclosed by triangular faces. This fully utilizes the stability of triangles and effectively transfers complex loads to the axial force direction of the inclined support legs 301. Furthermore, through the design of this support structure, the load transmitted from the upper wind turbine can be effectively decomposed, converting most of the bending moment into axial force on the support legs 301, thus improving the utilization efficiency of material properties.

[0033] In some embodiments, the annular rib 200 includes two annular rings 201 arranged vertically, with a support column 202 fixedly disposed between the two annular rings 201. By providing the annular rib 200, the steel tower 400 is reinforced regardless of the direction from which the wind turbine load is transmitted, and the load is distributed layer by layer from the direction of stress to other directions. The wind turbine load distributed by the annular rib 200 is also supported by the diagonal supports that connect with the elliptical steel pipe.

[0034] In some embodiments, at least four support columns 202 are provided, and the four support columns 202 are equally spaced between the annular rings 201. The equally spaced support columns 202 can evenly distribute the load, so as to better transmit the load to the inclined support leg 301 of the lower triangular brace.

[0035] In some embodiments, at least eight support columns 202 are vertically arranged, and two of the eight support columns 202 form a support column group 202. Four support column groups 202 are distributed at equal intervals between the annular rings 201. The spacing between the support columns 202 in the same support column group 202 is smaller than the spacing between the support columns 202 in different support column groups 202.

[0036] In some embodiments, a vertical stiffening rib 203 is provided between the two annular rings 201, and the top and bottom ends of the vertical stiffening rib 203 are respectively fixedly connected to the upper and lower annular rings 201.

[0037] In some embodiments, a steel strand is provided inside the support leg 301, with one end of the steel strand fixedly connected to the annular rib plate 200 and the other end fixedly connected to the foundation platform 100. The steel strand may be prestressed steel strand to reduce the fatigue stress amplitude of the entire transition section.

[0038] In some embodiments, the inverted triangular structure has four support legs 301, and the bottom of each support leg 301 is provided with a fixing pile 302, which is fixed to the four corners of the foundation platform 100. By setting multiple round steel pipe diagonal support legs 301 and forming a spatial segment composed of triangular supports connected end to end, the vertical force transmitted from the annular rib plate 200 is received. By utilizing the spatial splicing of triangles, the stability of the triangle is maximized, and complex loads are converted into axial forces on the structure as much as possible.

[0039] In some embodiments, the foundation platform 100 includes a support platform 101 and fixed columns 102 fixed to the bottom of the support platform 101. Multiple fixed columns 102 are provided, and multiple fixed columns 102 are fixedly connected to the ground. Multiple fixed columns 102 are arranged in an array along adjacent sides of the foundation platform 100.

[0040] Optionally, the foundation cap 100 can also be a raft foundation, which is a fixed planar structure or a near-planar structure. The structure after the raft foundation is connected to the supporting structure can be referenced. Figure 5 As shown, its functions and beneficial effects are similar to those of the foundation platform 100 in the above embodiment, and will not be repeated here.

[0041] A wind turbine tower includes: a wind turbine head, a steel tower 400 supporting the wind turbine head, and a support structure for fixing the steel tower 400 to the ground, wherein the support structure adopts the support structure of the wind turbine tower described above.

[0042] In some embodiments, the bottom end of the steel tower 400 is provided with an inverted truncated cone.

[0043] In this embodiment, the complex loads such as bending moment, torque, horizontal force and vertical force transmitted from the wind turbine tower are decomposed into spatial segments using the support structure. This minimizes the bending moment force borne by the circular tube column of the lower support leg, thereby keeping the lower support leg under axial stress as much as possible, improving material utilization efficiency and helping to reduce material consumption.

[0044] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0045] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] It will be understood by those skilled in the art that, in the description of the embodiments of this application, the term "and / or" merely indicates a relationship describing the associated objects, meaning that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, the term "at least one" indicates any combination of at least two of a plurality of options, for example, including at least one of A, B, and C, which can represent any one or more elements selected from a set including communication between A, B, and C. Moreover, the term "multiple" means two or more, unless otherwise precisely specified.

[0049] In the description of the embodiments of this application, the terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A support structure for a wind turbine tower, characterized in that, include: The foundation platform is set at the bottom of the steel tower of the wind turbine tower, and the steel tower of the wind turbine tower is fixedly connected to the center of the top surface of the foundation platform; The annular rib plate that securely clamps the steel tower cylinder of the wind turbine tower; A support leg is inclinedly disposed between the annular rib and the foundation platform. The top end of the support leg is fixedly connected to the bottom end of the annular rib, and the bottom end of the support leg is fixedly connected to the foundation platform. The support leg includes two circular tube columns, the bottoms of which intersect to form an inverted triangular structure.

2. The support structure for a wind turbine tower according to claim 1, characterized in that, The annular rib plate includes two annular rings arranged vertically, with a support column fixedly arranged between the two annular rings.

3. The support structure for a wind turbine tower according to claim 2, characterized in that, At least four support columns are provided, and the four support columns are distributed at equal intervals between the annular rings.

4. The support structure for a wind turbine tower according to claim 2, characterized in that, At least eight support columns are provided. Each pair of the eight support columns forms a support column group. The four support column groups are distributed at equal intervals between the annular rings. The spacing between the support columns in the same support column group is smaller than the spacing between the support columns in different support column groups.

5. The support structure for a wind turbine tower according to any one of claims 2-4, characterized in that, A vertical stiffening rib is also provided between the two annular rings, and the top and bottom ends of the vertical stiffening rib are respectively fixedly connected to the upper and lower annular rings.

6. The support structure for a wind turbine tower according to claim 1, characterized in that, The support leg is equipped with a steel strand, one end of which is fixedly connected to the annular rib plate and the other end is fixedly connected to the foundation platform.

7. The support structure for a wind turbine tower according to claim 1, characterized in that, The inverted triangular structure has four supporting legs, and the bottom of the four supporting legs is provided with fixing piles, which are fixed to the four corners of the foundation platform.

8. The support structure for a wind turbine tower according to claim 1, characterized in that, The foundation platform includes a load-bearing platform and fixed columns fixed to the bottom of the load-bearing platform. Multiple fixed columns are provided and fixedly connected to the ground. The multiple fixed columns are arranged in an array along the adjacent two sides of the foundation platform.

9. A wind turbine tower, characterized in that, include: The wind turbine head, the steel tower supporting the wind turbine head, and the support structure for fixing the steel tower to the ground, wherein the support structure adopts the support structure of the wind turbine tower as described in any one of claims 1-8.

10. A wind turbine tower according to claim 9, characterized in that, The bottom end of the steel tower is provided with an inverted truncated cone.

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