Tower drum and wind generating set

Abstract

The utility model relates to a tower drum and a wind generating set. The tower drum comprises a drum body, a supporting structure and a plurality of prestressed cables. The supporting structure is arranged in the cylinder body; the supporting structure comprises a support and a plurality of supporting wheels, the supporting wheels are rotatably installed on the support and arranged at intervals with the inner wall of the barrel, the support is connected with the barrel, and the supporting wheels are arranged at intervals in the circumferential direction of the barrel; the two ends of a plurality of prestressed cables extend to the two sides, in the axial direction of the barrel, of the supporting structure correspondingly and are connected with the barrel, and each prestressed cable is tensioned and can be wound around the corresponding supporting wheel in a sliding mode. According to the tower drum and the wind generating set provided by the embodiment of the invention, the damage condition of the prestressed cable can be effectively reduced, and the stability of the tower drum structure and the safety of the wind generating set are improved.

Description

Technical Field

[0001] This application relates to the field of wind power technology, and in particular to a tower and a wind turbine generator set. Background Technology

[0002] The tower is an important component of a wind turbine generator set, used to support the generator and wind turbine blades. The tower typically contains prestressed cables inside, with one end connected to the top of the tower and the other end connected to the foundation at the bottom. By adjusting the tension of the prestressed cables, the tower is compressed, thereby ensuring its stability.

[0003] However, during use, it was found that the tower is formed by connecting and assembling multiple tower sections. At the point where the tower diameter changes, a prismatic structure is formed on the inner wall of the tower. Since the prestressed cables extend along the inner wall of the tower, the prismatic structure can easily cause frictional damage to the prestressed cables, affecting the structural stability of the tower and the safety of the wind turbine generator. Utility Model Content

[0004] This application provides a tower and a wind turbine generator set, which can effectively reduce damage to prestressed cables and improve the stability of the tower structure and the safety of the wind turbine generator set.

[0005] This application provides a tower cylinder, wherein the tower cylinder includes a cylinder body, a supporting structure, and multiple prestressed cables;

[0006] A support structure is located inside the cylinder; the support structure includes a bracket and a plurality of support wheels, the support wheels are rotatably mounted on the bracket and spaced apart from the inner wall of the cylinder, the bracket is connected to the cylinder, and each of the support wheels is spaced apart along the circumference of the cylinder;

[0007] Multiple prestressed cables extend to both ends of the support structure along the axial direction of the cylinder and are connected to the cylinder. Each prestressed cable is tensioned and slidably wound around a corresponding support wheel.

[0008] According to one aspect of the embodiments of this application, the cylinder includes a straight cylinder section and a conical cylinder section connected to each other, the support structure is located at the connection between the conical cylinder section and the straight cylinder section, and the bracket is connected to the straight cylinder section and / or the conical cylinder section; a portion of the prestressed cable is located in the straight cylinder section, and a portion of the prestressed cable is located in the conical cylinder section.

[0009] According to one aspect of the embodiments of this application, the bracket includes multiple support shafts and multiple sets of support leg components. Each support shaft extends circumferentially along the cylinder and is connected sequentially. Each support wheel is rotatably sleeved on one of the support shafts. A set of support leg components is connected between two adjacent support shafts. The support leg components are connected to the inner wall of the cylinder.

[0010] According to one aspect of the present application, the bracket is provided with a plurality of brackets and is spaced apart circumferentially along the cylinder, and each bracket is equipped with a support wheel.

[0011] According to one aspect of the present application, the support includes a support shaft and two sets of support leg members. The support shaft extends circumferentially along the cylinder, and the two sets of support leg members are respectively connected to both ends of the support shaft, and the support leg members are connected to the inner wall of the cylinder.

[0012] According to one aspect of the present application, the axial dimension of the support shaft is greater than the axial dimension of the support wheel, and the support wheel can reciprocate relative to the support shaft along its axial direction.

[0013] According to one aspect of the embodiments of this application, the support leg component includes a first support leg and a second support leg. The first end of the first support leg and the first end of the second support leg are both fixedly connected to the support shaft. The second end of the first support leg and the second end of the second support leg are both connected to the inner wall of the cylinder. The second end of the first support leg and the second end of the second support leg are spaced apart along the axial direction of the cylinder.

[0014] According to one aspect of the embodiments of this application, the second end of the first leg is detachably connected to the inner wall of the straight section, and the second end of the second leg is detachably connected to the inner wall of the conical section.

[0015] According to one aspect of the present application, the leg component further includes a connecting plate, and the second end of the first leg and the second end of the second leg are both provided with connecting plates. The connecting plates are detachably connected to the cylinder through connectors.

[0016] According to one aspect of the present application, the surface of the connecting plate facing the inner wall of the cylinder is in close contact with the inner wall of the cylinder;

[0017] And / or, each of the connecting plates is detachably connected to the cylinder via two of the connecting members, the two connecting members being spaced apart along the axial direction of the cylinder.

[0018] According to one aspect of the embodiments of this application, the rotation axis of the support wheel is perpendicular to the axial center line of the cylinder, and the rotation axis of the support wheel is perpendicular to the line connecting the center of the support wheel to the axial center line of the cylinder;

[0019] And / or, a positioning groove is recessed around the outer circumference of the support wheel, and the prestressed cable is embedded in the positioning groove.

[0020] This application also provides a wind turbine generator set, wherein the wind turbine generator set includes the tower as described above.

[0021] The tower and wind turbine generator provided in this application embodiment have a support structure inside the tower body. The support structure has a bracket and support wheels. After the bracket is connected to the tower body, the support wheels can be spaced apart from the inner wall of the tower body. At this time, the prestressed cable is wound and tensioned on the corresponding support wheel, which can effectively make a certain distance between the prestressed cable and the inner wall of the tower body, preventing the prestressed cable from contacting the inner wall of the tower body and causing friction, thereby effectively reducing the damage to the prestressed cable. At the same time, when the prestressed cable is subjected to external force, the rolling of the support wheel allows the prestressed cable to be adjusted along the axial direction of the tower body, so that the tension of the prestressed cable is the same at all points, improving the stability of the tower structure and the safety of the wind turbine generator. Attached Figure Description

[0022] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the radial cross-section of the tower provided in an embodiment of this application;

[0024] Figure 2 A schematic diagram of the axial cross-section of the tower provided in an embodiment of this application;

[0025] Figure 3 A three-dimensional structural diagram of the support structure for the tower provided in an embodiment of this application;

[0026] Figure 4 A schematic plan view of the support structure of the tower provided in the embodiments of this application;

[0027] Figure 5 This is a schematic diagram of the connecting plate of the support structure of the tower provided in the embodiment of this application.

[0028] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0029] Explanation of icon numbers:

[0030] 1. Cylinder body; 11. Straight cylinder section; 12. Conical cylinder section; 2. Support structure; 21. Bracket; 211. Support shaft; 212. Leg component; 2121. First leg; 2122. Second leg; 213. Connecting plate; 2131. Connecting hole; 22. Support wheel; 221. Positioning groove; 3. Prestressed cable. Detailed Implementation

[0031] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0032] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the tower and wind turbine generator set of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] like Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a tower, which is installed on a foundation to support a wind turbine. The tower includes a cylinder 1, a support structure 2, and multiple prestressed cables 3. The prestressed cables 3 extend axially along the cylinder 1 and are used to press the cylinder 1 to improve its stability. The support structure 2 is used to separate the prestressed cables 3 from the inner wall of the cylinder 1 to prevent contact friction between the prestressed cables 3 and the inner wall of the cylinder 1, which could cause damage.

[0034] The support structure 2 is located inside the cylinder 1 and fixed to the inner wall of the cylinder 1.

[0035] Specifically, the support structure 2 includes a bracket 21 and multiple support wheels 22. The bracket 21 is fixedly connected to the inner wall of the cylinder 1. The support wheels 22 are rotatably mounted on the bracket 21 and spaced apart from the inner wall of the cylinder 1 to ensure that the support wheels 22 do not come into contact with the inner wall of the cylinder 1 during rotation. Each support wheel 22 is spaced apart along the circumference of the cylinder 1. The two ends of multiple prestressed cables 3 extend to both sides of the support structure 2 along the axial direction of the cylinder 1 and are connected to the cylinder 1. Each prestressed cable 3 is tensioned and can slide around a support wheel 22 corresponding to itself, that is, each prestressed cable 3 spans a support wheel 22.

[0036] Multiple prestressed cables 3 are spaced apart along the circumference of the cylinder 1 to provide uniform compressive force along the circumference of the cylinder 1, ensuring that the structural strength of the cylinder 1 is uniform throughout.

[0037] The prestressed cables 3 and the support wheels 22 can be set one-to-one, or the number of support wheels 22 can be greater than the number of prestressed cables 3. This ensures that each prestressed cable 3 is supported by the support wheels 22 and spaced apart from the inner wall of the cylinder 1, preventing the prestressed cables 3 from contacting the inner wall of the cylinder 1 and causing friction. This effectively reduces the possibility of damage to the prestressed cables 3. At the same time, when the prestressed cables 3 are subjected to external forces, the rolling of the support wheels 22 allows the prestressed cables 3 to be adjusted along the axial direction of the cylinder 1, ensuring that the tension of the prestressed cables 3 is the same at all points, thereby improving the stability of the tower structure and the safety of the wind turbine generator.

[0038] like Figure 2 As shown, according to one aspect of an embodiment of this application, the cylindrical body 1 includes a straight cylindrical section 11 and a conical cylindrical section 12 connected to each other. The conical cylindrical section 12 is disposed on a foundation, and the straight cylindrical section 11 is connected above the conical cylindrical section 12. The diameter of the straight cylindrical section 11 remains constant from top to bottom, while the diameter of the conical cylindrical section 12 gradually increases from top to bottom. The diameter of the upper end of the conical cylindrical section 12 is equal to the diameter of the straight cylindrical section 11. At the connection between the conical cylindrical section 12 and the straight cylindrical section 11, due to the change in the inner diameter of the cylindrical body 1, an annular ridge structure is formed on the inner wall of the cylindrical body 1.

[0039] The support structure 2 is located at the connection between the conical section 12 and the straight section 11 to ensure that the prestressed cable 3 can be effectively separated from the cylinder 1 at the ridge structure on the inner wall of the cylinder 1, and to prevent the prestressed cable 3 from contacting the ridge structure and causing friction damage.

[0040] The bracket 21 is connected to the straight section 11 and / or the conical section 12 for ease of construction.

[0041] A portion of the prestressed cable 3 is located in the straight section 11, and a portion of the prestressed cable 3 is located in the conical section 12. Specifically, the prestressed cable 3 can be formed by connecting multiple shorter cable segments end to end, or it can be a single, longer cable. The upper end of the prestressed cable 3 can be fixed to the top of the straight section 11, and the lower end of the prestressed cable 3 can be fixed to the bottom of the conical section 12 or directly fixed to the foundation to achieve the fixed installation of the prestressed cable 3 and ensure the compression effect on the cylinder 1 after tensioning.

[0042] like Figure 3 As shown, according to one aspect of the embodiments of this application, the bracket 21 includes multiple support shafts 211 and multiple sets of support leg components 212. Each support shaft 211 extends along the circumference of the cylinder 1 and is connected sequentially to form a polygonal ring structure. A set of support leg components 212 is connected at the connection between two adjacent support shafts 211. Each set of support leg components 212 is connected to the inner wall of the cylinder 1 to fix the ring structure to the inner wall of the cylinder 1.

[0043] Optionally, the number of support wheels 22 can be equal to the number of support shafts 211, or the number of support wheels 22 can be less than the number of support shafts 211. Each support wheel 22 is rotatably mounted on a support shaft 211, and the support shaft 211 serves as the pivot of the corresponding support wheel 22.

[0044] In this embodiment of the application, each support wheel 22 of the bracket 21 shares a bracket 21. During construction, each support wheel 22 can be pre-assembled with the bracket 21 and transported as a whole to the inside of the cylinder 1 for installation.

[0045] like Figure 4 As shown, according to one aspect of an embodiment of this application, a plurality of supports 21 are provided and spaced apart circumferentially along the cylinder 1, and each support 21 is equipped with a support wheel 22. In this embodiment, each support 21 and a support wheel 22 form a whole, which has the advantages of small overall structural size and easy transportation. During construction, a corresponding number of support structures 2 can be installed inside the cylinder 1 according to the number of prestressed cables 3.

[0046] like Figure 4 As shown, according to one aspect of the embodiment of this application, the bracket 21 includes a support shaft 211 and two sets of support leg components 212. The support shaft 211 extends circumferentially along the cylinder 1 and passes through a corresponding support wheel 22. The support shaft 211 serves as the pivot of the support wheel 22. The two sets of support leg components 212 are respectively connected to the two ends of the support shaft 211, and the support leg components 212 are connected to the inner wall of the cylinder 1 to realize the connection between the support structure 2 and the cylinder 1.

[0047] like Figure 1 , Figure 3 and Figure 4As shown, according to one aspect of the embodiments of this application, the axial dimension of the support shaft 211 is greater than the axial dimension of the support wheel 22, so that the support wheel 22 can slide back and forth relative to the support shaft 211 along its axial direction, which can effectively reduce the constraint of the support wheel 22 on the prestressed cable 3, thereby further reducing the frictional damage to the prestressed cable 3. At the same time, the angle error tolerance of the prestressed cable 3 is high, reducing the installation difficulty of the prestressed cable 3.

[0048] like Figure 3 As shown, according to one aspect of an embodiment of this application, the support leg component 212 includes a first support leg 2121 and a second support leg 2122. The first end of the first support leg 2121 and the first end of the second support leg 2122 are both fixedly connected to the support shaft 211. The second end of the first support leg 2121 and the second end of the second support leg 2122 are both connected to the inner wall of the cylinder 1. The second ends of the first support leg 2121 and the second end of the second support leg 2122 are spaced apart along the axial direction of the cylinder 1. The first support leg 2121, the second support leg 2122 and the cylinder 1 form a stable triangular structure, so that the support leg component 212 provides reliable support for the support shaft 211 and the roller.

[0049] like Figure 3 and Figure 4 As shown, according to one aspect of an embodiment of this application, the second end of the first leg 2121 is detachably connected to the inner wall of the straight section 11, and the second end of the second leg 2122 is detachably connected to the inner wall of the tapered section 12. This allows the leg member 212 to span the connection between the straight section 11 and the tapered section 12, enabling the support wheel 22 and the prestressed cable 3 to effectively avoid the ridge structure formed at the connection between the straight section 11 and the tapered section 12.

[0050] like Figure 3 and Figure 4 As shown, according to one aspect of an embodiment of this application, the outrigger component 212 further includes a connecting plate 213. The second end of both the first outrigger 2121 and the second end of the second outrigger 2122 are provided with the connecting plate 213. The connecting plate 213 is detachably connected to the cylinder 1 via a connector. By providing the connecting plate 213, the contact area between the first outrigger 2121 and the cylinder 1, and between the second outrigger 2122 and the cylinder 1, can be increased, thereby improving the stability of the outrigger component 212 installed on the cylinder 1.

[0051] like Figure 4 As shown, according to one aspect of the embodiment of this application, the surface of the connecting plate 213 facing the inner wall of the cylinder 1 is in close contact with the inner wall of the cylinder 1 to ensure the contact area between the connecting plate 213 and the inner wall of the cylinder 1.

[0052] Specifically, since the inner wall of the cylinder 1 has an arc-shaped surface, the angle between the connecting plate 213 and the corresponding first leg 2121 or second leg 2122 can be adjusted so that the connecting plate 213 is approximately parallel to the inner wall of the cylinder 1 at the corresponding position, so as to ensure reliable contact between the connecting plate 213 and the inner wall of the cylinder 1.

[0053] like Figure 5 As shown, according to one aspect of an embodiment of this application, each connecting plate 213 is detachably connected to the cylinder 1 via two connectors, the two connectors being spaced apart along the axial direction of the cylinder 1. Specifically, the connecting plate 213 has two connecting holes 2131, the two connecting holes 2131 being spaced apart along the axial direction of the cylinder 1, and each connector passing through one connecting hole 2131 and connecting to the cylinder 1. This arrangement can improve the connection reliability between the connecting plate 213 and the cylinder 1, and at the same time, the relative movement between the connecting plate 213 and the cylinder 1 can be restricted by the cooperation of the two connectors, preventing the connecting plate 213 from rotating or shifting.

[0054] According to one aspect of the embodiments of this application, the rotation axis of the support wheel 22 is perpendicular to the axial center line of the cylinder 1, and the rotation axis of the support wheel 22 is perpendicular to the line connecting the center of the support wheel 22 to the axial center line of the cylinder 1; so as to ensure that a portion of the circumferential surface of the support wheel 22 faces the axial center line of the cylinder 1, and during the displacement of the prestressed cable 3 along the axial direction of the cylinder 1, a force along its tangent can be applied to the circumferential surface of the support wheel 22, so that the support wheel 22 rotates under the action of the force, and the adjustment makes the prestressed cable 3 uniformly tensioned at all points.

[0055] A positioning groove 221 is recessed around the outer circumference of the support wheel 22, and the prestressed cable 3 is embedded in the positioning groove 221. This ensures a reliable connection between the prestressed cable 3 and the support wheel 22. During displacement along the circumference of the cylinder 1, the prestressed cable 3 can drive the support wheel 22 to move synchronously along the circumference of the cylinder 1, and is not easily separated from the support wheel 22, thus ensuring effective support of the prestressed cable 3 by the support wheel 22.

[0056] The tower provided in this application has a simple structure and high construction efficiency. At the connection between the conical section 12 and the straight section 11, it meets the requirements of changing the transmission path of the prestressed cable 3 from the conical section 12 to the straight section 11 and the structural strength is satisfied.

[0057] This application also provides a wind turbine generator set, wherein the wind turbine generator set includes the tower as described above.

[0058] The wind turbine generator provided in this application embodiment has a support structure 2 installed inside the tower body 1. The support structure 2 has a bracket 21 and a support wheel 22. After the bracket 21 is connected to the tower body 1, the support wheel 22 can be spaced apart from the inner wall of the tower body 1. At this time, the prestressed cable 3 is wound and tensioned on the corresponding support wheel 22, which can effectively make a certain distance between the prestressed cable 3 and the inner wall of the tower body 1, preventing the prestressed cable 3 from contacting the inner wall of the tower body 1 and causing friction, thereby effectively reducing the damage to the prestressed cable 3. At the same time, when the prestressed cable 3 is subjected to external force, the rolling of the support wheel 22 allows the prestressed cable 3 to be adjusted along the axial direction of the tower body 1, so that the tension of the prestressed cable 3 is the same at all points, improving the stability of the tower structure and the safety of the wind turbine generator.

[0059] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tower, characterized in that, The tower includes: Cylinder (1); A support structure (2) is provided inside the cylinder (1); the support structure (2) includes a bracket (21) and a plurality of support wheels (22), the support wheels (22) are rotatably mounted on the bracket (21) and spaced apart from the inner wall of the cylinder (1), the bracket (21) is connected to the cylinder (1), and each of the support wheels (22) is spaced apart along the circumference of the cylinder (1); Multiple prestressed cables (3) are provided, with both ends of the prestressed cables (3) extending to both sides of the support structure (2) along the axial direction of the cylinder (1) and connected to the cylinder (1). Each prestressed cable (3) is tensioned and slidably wound around a support wheel (22) corresponding to itself.

2. The tower according to claim 1, characterized in that, The cylinder (1) includes a straight cylinder section (11) and a conical cylinder section (12) connected to each other. The support structure (2) is located at the connection between the conical cylinder section (12) and the straight cylinder section (11), and the bracket (21) is connected to the straight cylinder section (11) and / or the conical cylinder section (12). A portion of the prestressed cable (3) is located in the straight cylinder section (11), and a portion of the prestressed cable (3) is located in the conical cylinder section (12).

3. The tower according to claim 2, characterized in that, The bracket (21) includes multiple support shafts (211) and multiple sets of support leg components (212). Each support shaft (211) extends along the circumference of the cylinder (1) and is connected sequentially. Each support wheel (22) is rotatably sleeved on one of the support shafts (211). A set of support leg components (212) is connected between two adjacent support shafts (211). The support leg components (212) are connected to the inner wall of the cylinder (1).

4. The tower according to claim 3, characterized in that, The bracket (21) is provided in multiple ways and is spaced apart around the circumference of the cylinder (1), and each bracket (21) is equipped with a support wheel (22).

5. The tower according to claim 4, characterized in that, The bracket (21) includes a support shaft (211) and two sets of support leg components (212). The support shaft (211) extends circumferentially along the cylinder (1). The two sets of support leg components (212) are respectively connected to the two ends of the support shaft (211) and the support leg components (212) are connected to the inner wall of the cylinder (1).

6. The tower according to claim 3 or 5, characterized in that, The axial dimension of the support shaft (211) is greater than the axial dimension of the support wheel (22), and the support wheel (22) can slide back and forth relative to the support shaft (211) along its axial direction.

7. The tower according to claim 3 or 5, characterized in that, The support leg component (212) includes a first support leg (2121) and a second support leg (2122). The first end of the first support leg (2121) and the first end of the second support leg (2122) are both fixedly connected to the support shaft (211). The second end of the first support leg (2121) and the second end of the second support leg (2122) are both connected to the inner wall of the cylinder (1). The second end of the first support leg (2121) and the second end of the second support leg (2122) are spaced apart along the axial direction of the cylinder (1).

8. The tower according to claim 7, characterized in that, The second end of the first leg (2121) is detachably connected to the inner wall of the straight section (11), and the second end of the second leg (2122) is detachably connected to the inner wall of the conical section (12).

9. The tower according to claim 7, characterized in that, The leg component (212) further includes a connecting plate (213). The second end of the first leg (2121) and the second end of the second leg (2122) are both provided with connecting plates (213). The connecting plates (213) are detachably connected to the cylinder (1) through connectors.

10. The tower according to claim 9, characterized in that, The surface of the connecting plate (213) facing the inner wall of the cylinder (1) is in contact with the inner wall of the cylinder (1); And / or, each of the connecting plates (213) is detachably connected to the cylinder (1) by two of the connecting members, which are spaced apart along the axial direction of the cylinder (1).

11. The tower according to claim 1, characterized in that, The rotation axis of the support wheel (22) is perpendicular to the axial center line of the cylinder (1), and the rotation axis of the support wheel (22) is perpendicular to the line connecting the center of the support wheel (22) to the axial center line of the cylinder (1). And / or, a positioning groove (221) is recessed around the outer circumference of the support wheel (22), and the prestressed cable (3) is embedded in the positioning groove (221).

12. A wind turbine generator set, characterized in that, The wind turbine generator set includes a tower as described in any one of claims 1 to 11.

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