Modular truss structure for wind turbines

Abstract

The utility model relates to a kind of wind-driven generator modular truss structure, including several column modules, flexible connection between adjacent column modules, flexible connection between column module and cabin, it is equipped with elastic shock pad between the column module, it is equipped with supporting frame between the column module and cabin, and it is equipped with elastic shock pad, sealing expansion joint on the side of supporting frame facing cabin;Vertical pole is also extended on the column module, and the side of the extension section of vertical pole facing cabin is equipped with flexible corner for compensating installation gap.The utility model uses soft connection structure between wind-driven generator truss and cabin glass steel, realizes the purpose of buffering vibration reduction, reliable force transmission, and realizes flexible transition by the elastic connecting piece of non-standard design.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine truss technology, and in particular to a modular truss structure for wind turbines. Background Technology

[0002] Wind turbine towers can be constructed from metal and concrete or from truss structures. Truss structures, which mainly refer to truss-type towers, are important structural components in wind power systems used to support the turbine blades and drive units.

[0003] Compared to other types of towers, such as cylindrical towers, truss towers are relatively simple to manufacture and use less material, thus often resulting in lower costs. However, the stability of truss structures is slightly weaker than that of metal-concrete composite structures, especially at the connection between the top of the truss and the nacelle, which is susceptible to stress and external forces, posing a safety hazard to the overall stability. Utility Model Content

[0004] To address the shortcomings of existing production technologies, the applicant provides a structurally sound modular truss structure for wind turbines, which achieves vibration reduction and fatigue resistance through flexible connections.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A modular truss structure for a wind turbine includes several column modules, with flexible connections between adjacent column modules and between the column modules and the nacelle.

[0007] Elastic shock-absorbing pads are provided between the column modules.

[0008] A support frame is provided between the column module and the nacelle. An elastic shock-absorbing pad and a sealed expansion joint are provided on the side of the support frame facing the nacelle. A vertical pole extends from the column module. A flexible corner stop is provided on the side of the extension section of the vertical pole facing the nacelle to compensate for the installation gap.

[0009] As a further improvement to the above technical solution:

[0010] The column module includes:

[0011] Erect poles, set vertically, form the external frame surrounding the column module.

[0012] A diagonal brace is a cross-connection between two adjacent uprights, and the diagonal braces between two adjacent uprights are coplanar.

[0013] The top ends of the uprights and diagonal braces in the vertical direction are coplanar, and the bottom ends in the vertical direction are coplanar, forming a apex angle. A flange located in the horizontal plane is provided on the apex angle.

[0014] Elastic shock-absorbing pads are installed between the flanges of adjacent column modules.

[0015] The middle part of the upright is the installation position of the diagonal brace, and an elastic shock-absorbing pad is provided between the diagonal brace and the upright.

[0016] The upright extends upward from one column module in the vertical direction to the adjacent column module.

[0017] Elastic shock-absorbing pads are connected between the uprights of two adjacent column modules.

[0018] At the top of the assembled column module, the uprights extend upwards to form an extended section of space; the supporting frame is located in the middle of the reassembled uprights and is connected to the top of the diagonal brace of the column module at that location.

[0019] The extension is elastically restrained in the bottom circumferential direction.

[0020] Flexible corner guards use elastic shock-absorbing pads or flexible layers.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model adopts a soft connection structure between the wind turbine truss and the fiberglass nacelle to achieve the purpose of buffering and vibration reduction and reliable force transmission. The flexible transition is achieved through non-standard designed elastic connectors.

[0023] The flexible connection structure avoids direct rigid connection between the rigid truss and the rigid nacelle. Through intermediate components with elastic and damping characteristics, it absorbs the vibration and displacement between the truss and the nacelle, providing a certain buffering effect while ensuring the support strength. It is especially used to buffer wind loads and vibrations generated by equipment operation, and avoids cracking of fiberglass due to rigid transmission. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective.

[0026] Figure 3 This is a schematic diagram of Embodiment 1 of the present invention.

[0027] Figure 4 This is a schematic diagram of Embodiment 2 of the present invention.

[0028] Figure 5 This is a schematic diagram of the flexible arrangement at the support frame of this utility model.

[0029] The components include: 1. Cabin; 2. Extension section; 3. Truss; 4. Column module; 5. Elastic shock-absorbing pad; 6. First flange; 7. Second flange; 8. Bolt; 9. Upright; 10. Diagonal brace; 11. Reinforcing groove; 12. Flexible corner stop; 13. Support frame; 14. Sealed expansion joint. Detailed Implementation

[0030] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0031] like Figures 1-5 As shown, the modular truss structure 3 of the wind turbine generator in this embodiment includes several column modules 4, adjacent column modules 4 are flexibly connected, and the column modules 4 are flexibly connected to the nacelle 1.

[0032] Elastic shock-absorbing pads 5 are provided between the column modules 4.

[0033] A support frame 13 is provided between the column module 4 and the cabin 1. An elastic shock-absorbing pad 5 and a sealed expansion joint 14 are provided on the side of the support frame 13 facing the cabin 1. A vertical pole 9 extends from the column module 4. A flexible corner stop 12 for compensating for installation gaps is provided on the side of the vertical pole 9 facing the extension section 2 of the cabin 1.

[0034] Column module 4 includes:

[0035] Upright pole 9, set vertically, forms the external frame surrounding column module 4.

[0036] Diagonal braces 10 are intersecting between two adjacent uprights 9, and the diagonal braces 10 between two adjacent uprights 9 are coplanar.

[0037] The top ends of the uprights 9 and the bottom ends of the diagonal braces 10 are coplanar in the vertical direction, forming a apex angle, on which a flange located in the horizontal plane is installed.

[0038] An elastic damping pad 5 is installed between the flanges of adjacent column modules 4.

[0039] The middle part of the upright 9 is the installation position of the diagonal brace 10, and an elastic shock-absorbing pad 5 is provided between the diagonal brace 10 and the upright 9.

[0040] The upright 9 extends upward from one column module 4 in the vertical direction to the adjacent column module 4.

[0041] An elastic shock-absorbing pad 5 is connected between the uprights 9 of two adjacent column modules 4.

[0042] At the top surface of the assembled column module 4, the upright 9 extends upward to form the space of the extension section 2; the supporting frame 13 is located in the middle of the reassembled upright 9 and is connected to the top of the diagonal brace 10 of the column module 4 at that location.

[0043] Extension 2 is elastically limited in the bottom circumferential direction.

[0044] The flexible corner guard 12 uses an elastic shock-absorbing pad 5 or a flexible layer.

[0045] The specific structure and working principle of this utility model are as follows:

[0046] like Figure 1 The diagram shows the connection between truss 3 and nacelle 1. An extension section 2 is also connected to the bottom of nacelle 1. The key improvement of this embodiment lies in the flexible connection structure between the extension section 2 and the top of truss 3, and the elastic support structure that can be used between multiple truss 3 modules.

[0047] The truss 3 main body is composed of multiple truss 3 modules, including a base frame module and several column modules 4. Elastic damping pads 5 can be set between two adjacent modules. In this embodiment, the elastic damping pads 5 can be commercially available models such as EPDM-20-25 and PU-4701-40.

[0048] Taking two adjacent column modules 4 as an example, flanges are provided on the top surface of the lower column module 4 and the bottom surface of the upper column module 4. The flange on the top surface of the lower column module 4 and the flange on the bottom surface of the upper column module 4 are parallel to each other. For ease of description, the aforementioned flanges will be named the first flange 6 and the second flange 7 below. An elastic damping pad 5 is sandwiched between the first flange 6 and the second flange 7. After the first flange 6 and the second flange 7 are tightened, the elastic damping pad 5 is clamped and limited, avoiding rigid impact between the two column modules 4, thereby realizing the functions of vibration reduction, buffering and load transfer, and also compensating for a certain displacement.

[0049] Since each column module 4 is composed of multiple intersecting angle steels, the bottom and top of each column module 4 are not flat, but rather the end faces of at least four angle steels. Flanges are installed on the end faces of the angle steels. This embodiment provides two connection methods:

[0050] Example 1:

[0051] All the end faces of the angle steel are set to be parallel to the ground plane, and the first flange 6, the second flange 7, and the elastic damping pad 5 are all located in the horizontal plane. After the first flange 6 and the second flange 7 are fastened with bolts 8, the outer edges of the upper column module 4 and the lower column module 4 form a coplanar structure.

[0052] Example 2:

[0053] The difference from Embodiment 1 is that in this embodiment, each column module 4 includes a vertical upright 9 and diagonal braces 10 intersecting between adjacent uprights 9. The ends of all diagonal braces 10 are flat against the uprights 9, and elastic shock-absorbing pads 5 are provided between the splicing surfaces of the diagonal braces 10 and the uprights 9. A square flange is used to connect the end face of the diagonal braces 10 in the vertical plane, the surface of the upright 9, and the elastic shock-absorbing pads 5.

[0054] To improve the stability between adjacent column modules 4 and simplify installation, the bottom of one upright 9 is located in the middle of the lower column module 4, and the top of this upright 9 extends to the middle of the upper column module 4. The uprights 9 of adjacent column modules 4 are connected using square flanges. This structure, using the middle portion of the upright 9 as the mounting point for the diagonal brace 10, is more stable and easier to operate than using the end of the upright 9 as the mounting point for the diagonal brace 10.

[0055] As a further optimization, the upright 9 is made of angle steel, with concave vertical grooves formed on its two vertical surfaces, serving as reinforcing grooves 11. The installation point of the diagonal brace 10 can fall on the bottom of a larger reinforcing groove 11, or it can fall between two adjacent reinforcing grooves 11.

[0056] Example 3:

[0057] On the top surface of the last column module 4 at the top, the upright 9 extends upward. On the inner wall of the upright 9, an elastic shock-absorbing pad 5 or a flexible layer is set to form four flexible corner blocks 12. The four apex corners of the bottom end of the extension section 2 fall exactly at the four flexible corner blocks 12 and are reliably limited.

[0058] In the plane where the top of the diagonal rod 10 of the last column module 4 is located, a support frame 13 located in the horizontal plane is installed. The support frame 13 is used to contact the bottom surface of the extension section 2 and support the extension section 2 and the cabin 1 on the extension section 2.

[0059] Multiple elastic damping pads 5 are arranged in a matrix array on the supporting frame 13, and sealed expansion joints 14 are installed at the four top corners of the supporting frame 13. The installation space of the sealed expansion joints 14 requires that the four bottom top corners of the extension section 2 cannot directly abut against the inner walls of the four uprights 9. Therefore, the thickened elastic damping pads 5 or flexible layers are used to compensate for the gap between the four uprights 9 and the four bottom top corners of the extension section 2.

[0060] The advantage of this application is that it can reduce vibration and fatigue through flexible connections, adapt to small displacements between components by using unique compensation capabilities, prevent additional loads caused by forced deformation, ensure the sealing and structural integrity of the connection parts, and reduce the frequency of maintenance.

[0061] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A modular truss (3) structure for a wind turbine generator, characterized in that: It includes several column modules (4), with adjacent column modules (4) flexibly connected, and the column modules (4) flexibly connected to the cabin (1). Elastic shock-absorbing pads (5) are provided between the column modules (4). A support frame (13) is provided between the column module (4) and the cabin (1). An elastic shock-absorbing pad (5) and a sealed expansion joint (14) are provided on the side of the support frame (13) facing the cabin (1). A vertical pole (9) extends from the column module (4). A flexible corner guard (12) for compensating for installation gaps is provided on the side of the vertical pole (9) facing the extension section (2) of the cabin (1).

2. The modular truss (3) structure for wind turbine generators as described in claim 1, characterized in that: The column module (4) includes: The uprights (9) are set vertically to form the external frame of the column module (4). Diagonal bracing (10) is intersecting between two adjacent uprights (9), and the diagonal bracing (10) between two adjacent uprights (9) are coplanar.

3. The modular truss (3) structure for wind turbine generators as described in claim 2, characterized in that: The top ends of the uprights (9) and the diagonal braces (10) in the vertical direction are coplanar, and the bottom ends in the vertical direction are coplanar, forming a apex angle. A flange located in the horizontal plane is provided on the apex angle.

4. The modular truss (3) structure for wind turbine generators as described in claim 3, characterized in that: An elastic damping pad (5) is installed between the flanges of adjacent column modules (4).

5. The modular truss (3) structure for wind turbine generators as described in claim 2, characterized in that: The middle part of the upright (9) is the installation position of the diagonal bar (10), and an elastic shock-absorbing pad (5) is provided between the diagonal bar (10) and the upright (9).

6. The modular truss (3) structure for wind turbine generators as described in claim 5, characterized in that: The upright (9) extends upward from one column module (4) in the vertical direction to the adjacent column module (4).

7. The modular truss (3) structure for wind turbine generators as described in claim 6, characterized in that: An elastic shock-absorbing pad (5) is connected between the uprights (9) of two adjacent column modules (4).

8. The modular truss (3) structure for wind turbine generators as described in claim 5, characterized in that: At the top surface of the assembled column module (4), the upright (9) extends upward to form the space of the extension section (2); the supporting frame (13) is located in the middle of the upright (9) and is connected to the top of the diagonal bar (10) of the column module (4).

9. The modular truss (3) structure for wind turbine generators as described in claim 8, characterized in that: The extension segment (2) is elastically limited in the bottom circumferential direction.

10. The modular truss (3) structure for wind turbine generators as described in claim 8, characterized in that: The flexible corner guard (12) uses an elastic shock-absorbing pad (5) or a flexible layer.

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