A tower damping device

Abstract

The application relates to a tower damping device applied in the field of wind turbine tower damping, which comprises a damping unit arranged in a tower, wherein the damping unit comprises an arc-shaped guide rail arranged on the inner wall of the tower, and a swing frame is slidably connected to the arc-shaped guide rail. The application has the technical effect that in the damping process, the swing frame only slides along the arc-shaped guide rail, without the need of reserving a large swing space in the tower, so that the installation difficulty and setting difficulty of the tower damping device are reduced.

Description

Technical Field

[0001] This application relates to the field of wind turbine tower vibration reduction technology, and in particular to a tower damping device. Background Technology

[0002] A wind turbine is a device that converts wind energy into electrical energy. It works by using the power of the wind to rotate propeller blades, which in turn drives a generator to produce electricity. A wind turbine typically consists of basic components such as blades, a nacelle, and a tower. The blades are designed to rotate with the wind, while the nacelle contains key components such as the generator and transmission mechanism.

[0003] With the continuous development of wind power generation technology, the height and size of wind turbine towers are also constantly increasing. Due to the inherent high flexibility of the tower, the vibration and deformation of the tower structure increase with the increase of tower height. Frequent tower swaying not only shortens the service life of the tower but may even lead to fatigue failure and accidents. Therefore, related technologies usually install dampers inside the tower to reduce vibration. For example, a pendulum damping device is installed inside the tower. When the tower vibrates, the pendulum of the pendulum damping device swings in the opposite direction, generating a counterforce to counteract and suppress the vibration, thereby protecting the tower structure.

[0004] However, the above-mentioned pendulum vibration reduction method is difficult to install because the pendulum swing requires a large swing space while the space inside the tower is limited, which increases the difficulty of setting up the tower damping device. Summary of the Invention

[0005] To help solve the problem of the high difficulty in setting up tower damping devices, this application provides a tower damping device with the following technical solution: it includes a damping unit installed inside the tower, the damping unit including an arc-shaped guide rail installed on the inner wall of the tower, and a swing frame slidably connected on the arc-shaped guide rail.

[0006] With the above technical solution, when the tower vibrates, the swing frame on the arc-shaped guide rail will slide along the arc-shaped guide rail to generate damping, thereby suppressing the vibration of the tower and protecting the tower structure. Compared with the pendulum vibration reduction method, the swing frame only slides along the arc-shaped guide rail during the vibration reduction process, without the need to reserve a large swing space in the tower, thus reducing the installation and setting difficulty of the tower damping device.

[0007] In one specific implementation, the damping unit is provided in one or more forms.

[0008] In one specific implementation, when there are multiple damping units, the multiple damping units are arranged at the same height or at different heights.

[0009] In one specific implementation, two damping units are provided, and the included angle between the arc-shaped guide rails of the two damping units is in the range of 70°~110°.

[0010] In one specific implementation, the damping unit is provided in three parts, and the included angle between the arc-shaped guide rails of two adjacent damping units is in the range of 50° to 70°.

[0011] In one specific implementation, the damping unit is provided with six units, and the included angle between the arc-shaped guide rails of two adjacent damping units is in the range of 110°~130°.

[0012] In one specific implementation, the damping unit is detachably connected to the inner wall of the tower via a connecting assembly.

[0013] In one specific implementation, the connecting assembly includes two support frames fixedly mounted on the inner wall of the tower, the arc-shaped guide rail is located between the two support frames, a transition frame is bolted to the support frame, a first limiting frame is provided on the transition frame, and the two ends of the arc-shaped guide rail are respectively bolted to the two first limiting frames.

[0014] In one specific implementation, the connecting assembly includes two first support plates bolted to the flange of the tower, an arc-shaped guide rail located between the two first support plates, the first support plates being located above the flange of the tower, and second limiting frames provided on the first support plates, with both ends of the arc-shaped guide rail bolted to the two second limiting frames respectively.

[0015] In one specific implementation, the connecting assembly includes two second support plates bolted to the flange of the tower, an arc-shaped guide rail located between the two second support plates, the second support plates being located below the flange, extension frames bolted to the second support plates, and the two ends of the arc-shaped guide rail being bolted to the two extension frames respectively.

[0016] In summary, this application has the following beneficial technical effects: When the tower vibrates, the swing frame on the arc-shaped guide rail slides along the arc-shaped guide rail to generate damping, thereby suppressing the vibration of the tower and protecting the tower structure. Compared with the pendulum vibration reduction method, the swing frame only slides along the arc-shaped guide rail during the vibration reduction process, without the need to reserve a large swing space in the tower, thus reducing the installation and setting difficulty of the tower damping device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0018] Figure 2This is a schematic diagram used in this application to illustrate the installation of damping units at different heights on the tower.

[0019] Figure 3 This is a schematic diagram illustrating the structure of the connecting component in Embodiment 1 of this application.

[0020] Figure 4 This is a schematic diagram illustrating the structure of the connecting component in Embodiment 2 of this application.

[0021] Figure 5 This is a schematic diagram illustrating the structure of the connecting component in Embodiment 3 of this application.

[0022] Reference numerals in the attached drawings: 1. Tower; 2. Arc-shaped guide rail; 3. Arc-shaped rack; 4. Support frame; 5. Adapter frame; 6. First limiting frame; 7. First support plate; 8. Flange; 9. Second limiting frame; 10. Second support plate; 11. Extension frame. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This application discloses a tower damping device.

[0025] Example 1 Reference Figure 1 The tower damping device includes a damping unit disposed within the tower 1. The damping unit includes an arc-shaped guide rail 2 mounted on the inner wall of the tower 1. The arc-shaped guide rail 2 is concave and has a gap with the inner wall of the tower 1. Specifically, the damping unit can be detachably connected to the inner wall of the tower 1 via a connecting assembly. A swing frame is slidably connected to the arc-shaped guide rail 2. For example, a groove can be opened on the side wall of the arc-shaped guide rail 2, and rollers matching the groove can be installed on the swing frame. The slidable connection between the swing frame and the arc-shaped guide rail 2 is achieved by rolling the rollers within the groove. Furthermore, the swing frame can also be slidably connected to the inner wall of the tower 1 via a connecting assembly. The swing frame is connected to the rotating shaft on the frame, and then the swing frame is slidably connected to the arc-shaped guide rail 2 by the shaft being mounted on the arc-shaped guide rail 2. Therefore, when the tower 1 vibrates, the swing frame on the arc-shaped guide rail 2 will slide back and forth along the arc-shaped guide rail 2 under the action of vibration force and its own weight, thereby generating damping, suppressing the vibration of the tower 1 and protecting the structure of the tower 1. Compared with the pendulum vibration reduction method, the swing frame only slides along the arc-shaped guide rail 2 during the vibration reduction process, without the need to reserve a large swing space in the tower 1, thereby reducing the installation difficulty and setting difficulty of the damping device of the tower 1.

[0026] Reference Figure 1Furthermore, in order to increase the vibration reduction effect generated during the swing of the swing frame, an arc-shaped rack 3 that matches the arc-shaped guide rail 2 can be fixedly connected to the concave surface of the arc-shaped guide rail 2. A gear shaft is rotatably connected on the swing frame, and the gear shaft meshes with the arc-shaped rack 3. As a result, during the sliding process of the swing frame, the gear shaft on the swing frame will rotate under the restriction of the arc-shaped rack 3, thereby further improving the vibration reduction effect generated by the swing frame during the swing.

[0027] Reference Figure 1 and Figure 2 It should be noted that during the actual installation of the damping units, the installation method and quantity can be flexibly adjusted according to the actual situation. Specifically, one or more damping units can be installed inside the tower 1. When multiple damping units need to be installed, they can be installed at the same height or at different heights. To ensure better damping effect when the tower 1 vibrates, when there are two damping units, the included angle between the arc-shaped guide rails 2 of the two damping units can be set to 70°~110°; when there are three damping units, the included angle between the arc-shaped guide rails 2 of two adjacent damping units can be set to 50°~70°; and when there are six damping units, the included angle between the arc-shaped guide rails 2 of two adjacent damping units can be set to 110°~130°. The above included angle range specifically refers to the angle between the swing direction of the swing frame on two adjacent arc-shaped guide rails 2 in the projected state when viewed from above.

[0028] Reference Figure 3 The connecting assembly is configured to include two support frames 4 welded to the inner wall of the tower 1, an arc-shaped guide rail 2 located between the two support frames 4, and an L-shaped adapter frame 5 bolted to the support frame 4. One end of the adapter frame 5 is bolted to the support frame 4, and the other end of the adapter frame 5 is welded to a first limiting frame 6. The first limiting frame 6 includes two limiting plates welded to the adapter frame 5 and arranged in parallel. The two ends of the arc-shaped guide rail 2 are bolted to the first limiting frame 6 via end-plugs and bolts between the two limiting plates. Specifically, the spacing between the two limiting plates can be set to match the ends of the arc-shaped guide rail 2, making it less prone to wobbling relative to the adapter frame 5 under external forces, thereby further enhancing the connection stability between the arc-shaped guide rail 2 and the support frame 4. Simultaneously, a reinforcing plate can be provided on the end face of the adapter frame 5 facing away from the guide rail to enhance the structural stability of the adapter frame 5, enabling it to provide stable support.

[0029] Example 2 Reference Figure 4The difference between this embodiment and Embodiment 1 is that the connecting assembly includes two first support plates 7 bolted to the flange 8 of the tower 1. Specifically, the first support plates 7 are fixed above the flange 8 via through holes in the flange 8 using bolt connections. An arc-shaped guide rail 2 is located between the two first support plates 7. A second limiting frame 9 is provided on the first support plates 7. The second limiting frame 9 includes two parallel limiting plates welded to the first support plates 7. The two ends of the arc-shaped guide rail 2 are bolted to the second limiting frame 9 via end-insertion and bolt connections between the two limiting plates. Specifically, the spacing between the two limiting plates can be set to match the ends of the arc-shaped guide rail 2, making it less prone to wobbling relative to the adapter frame 5 under external force, thereby further enhancing the connection stability between the arc-shaped guide rail 2 and the support frame 4.

[0030] Example 3 Reference Figure 5 The difference between this embodiment and Embodiment 1 is that the connecting assembly includes two second support plates 10 bolted to the flange 8 of the tower 1. Specifically, the second support plates 10 are fixed to the bottom of the flange 8 via through holes in the flange 8 using bolt connections. An arc-shaped guide rail 2 is located between the two second support plates 10, and an extension frame 11 is bolted to the second support plate 10. The two ends of the arc-shaped guide rail 2 are respectively bolted to the ends of the two extension frames 11 away from the second support plates 10. Furthermore, a reinforcing plate can be provided between the extension frame 11 and the first support plate 7 to enhance the stability of the connecting assembly.

[0031] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A tower damping device, characterized in that: It includes a damping unit installed inside the tower (1), the damping unit including an arc-shaped guide rail (2) installed on the inner wall of the tower (1), and a swing frame slidably connected on the arc-shaped guide rail (2); The arc-shaped guide rail (2) is concave. When the tower (1) vibrates, the swing frame on the arc-shaped guide rail (2) will slide back and forth along the arc-shaped guide rail (2) under the action of vibration force and its own weight, generating damping.

2. The tower damping device according to claim 1, characterized in that: The damping unit has one or more components.

3. The tower damping device according to claim 2, characterized in that: When there are multiple damping units, the multiple damping units are set at the same height or at different heights.

4. The tower damping device according to claim 2, characterized in that: The damping unit is provided in two parts, and the included angle between the arc-shaped guide rails (2) of the two damping units is in the range of 70°~110°.

5. The tower damping device according to claim 2, characterized in that: The damping unit is provided in three parts, and the included angle between the arc-shaped guide rails (2) of two adjacent damping units is 50°~70°.

6. The tower damping device according to claim 2, characterized in that: The damping unit is provided in six parts, and the included angle between the arc-shaped guide rails (2) of two adjacent damping units is in the range of 110°~130°.

7. The tower damping device according to claim 1, characterized in that: The damping unit is detachably connected to the inner wall of the tower (1) via a connecting assembly.

8. The tower damping device according to claim 7, characterized in that: The connecting assembly includes two support frames (4) fixedly installed on the inner wall of the tower (1), the arc-shaped guide rail (2) is located between the two support frames (4), the support frame (4) is bolted with a transition frame (5), the transition frame (5) is provided with a first limiting frame (6), and the two ends of the arc-shaped guide rail (2) are respectively bolted to the two first limiting frames (6).

9. The tower damping device according to claim 7, characterized in that: The connecting assembly includes two first support plates (7) bolted to the flange (8) of the tower (1), the arc-shaped guide rail (2) is located between the two first support plates (7), the first support plates (7) are located above the flange (8), the first support plates (7) are provided with second limiting frames (9), and the two ends of the arc-shaped guide rail (2) are bolted to the two second limiting frames (9) respectively.

10. The tower damping device according to claim 7, characterized in that: The connecting assembly includes two second support plates (10) bolted to the flange (8) of the tower (1), the arc-shaped guide rail (2) is located between the two second support plates (10), the second support plates (10) are located below the flange (8), and extension frames (11) are bolted to the second support plates (10). The two ends of the arc-shaped guide rail (2) are respectively bolted to the two extension frames (11).

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