Anti-shaking device for fan tower drum

Abstract

The utility model discloses an anti-shaking device for a fan tower drum, and mainly relates to the field of installation of wind generating sets. Comprising a cover plate covering the top of a tower drum, a sealing structure is arranged between the cover plate and the tower drum, and a damping device is arranged at the bottom of the cover plate; according to the utility model, vortex-induced vibration of the tower drum can be reduced through two measures of installing the damping device and installing the cover plate to seal the tower drum; meanwhile, the main crane can be loosened to prevent the crane from being damaged when the wind speed exceeds the wind-proof wind speed requirement of the crane.

Description

Technical Field

[0001] The utility model relates to the field of wind turbine generator installation, in particular to a wind turbine tower anti-sway device. Background Art

[0002] Wind turbine installation is the most risky construction content in wind farm construction. The installation of the tower generally requires continuous hoisting. The third and fourth sections of the tower and the nacelle should be installed on the same day. If the nacelle cannot be hoisted immediately, it is not allowed to stagnate for a long time in the hoisting stage of more than three sections; due to special reasons, it is impossible to avoid the hoisting stage (fourth section to nacelle) where vortex-induced vibration occurs frequently. If the hoisting cannot be completed within one day, the main crane is required not to loosen the hook, and the hook tension is about 50t. When using this measure, it should be ensured that the wind speed does not exceed the wind speed requirement of the crane itself. If the wind speed exceeds the wind speed requirement of the crane itself, it may cause damage to the crane.

[0003] To solve the above problems, there is a technical solution in the prior art of hanging spoilers on the tower, but the spoiler module cannot be used for a long time and is inconvenient to install and transport. In addition, welding the spoiler on the tower will also damage the structure of the tower itself. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art and to provide a wind turbine tower anti-sway device. By installing a damping device and installing a cover plate to seal the tower, the vortex-induced vibration of the tower can be reduced. At the same time, the main crane can be unhooked to prevent damage to the crane when the wind speed exceeds the crane's own wind speed requirement.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical solutions:

[0006] A wind turbine tower anti-sway device comprises a cover plate covering the top of the tower, a sealing structure is arranged between the cover plate and the tower, and a damping device is arranged at the bottom of the cover plate.

[0007] Preferably, the sealing structure is a rubber layer covering the bottom surface of the cover plate.

[0008] Preferably, a manhole is provided on the cover plate.

[0009] Preferably, the cover plate is provided with a plurality of lifting ears.

[0010] Preferably, a protective railing is provided on the top of the cover plate.

[0011] Preferably, the damping device comprises a steel wire rope with one end fixed to the bottom of the cover plate, and a counterweight is fixed to the end of the steel wire rope away from the cover plate.

[0012] Preferably, one end of the steel wire rope is fixed to the middle of the bottom of the cover plate, and the counterweight is an iron ball.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. After the cover plate of the utility model covers the top of the tower, the damping device is located inside the tower, and the damping device inside the tower can reduce the vibration of the tower.

[0015] 2. The utility model seals the top of the tower by means of a cover plate, and ensures the sealing between the cover plate and the tower by means of a sealing structure, thereby forming a closed space inside the tower. By means of the air flow and incompressibility of the air itself, a damper effect is achieved inside the tower, thereby reducing the vibration amplitude of the tower.

[0016] 3. The utility model has a manhole on the cover plate to facilitate personnel to go up and down, and to facilitate removing and re-hanging the hook.

[0017] 4. The utility model can reduce the vortex-induced vibration of the tower by installing a damping device and installing a cover plate to seal the tower. At the same time, the main crane can be unhooked to prevent the crane from being damaged when the wind speed exceeds the crane's own wind speed requirement. It can be applied to the tower installation work of various wind turbine models and has a wide range of applications. It can reduce the risks during the tower installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] The numbers in the attached drawings are: 1. tower; 11. wind turbine foundation; 2. cover plate; 3. sealing structure; 4. manhole; 5. lifting lug; 6. guardrail; 7. wire rope; 8. counterweight. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0021] Example: As attached Figure 1 As shown, the utility model describes a wind turbine tower anti-sway device, including a cover plate 2 covering the top of the tower 1, the cover plate 2 can be a circular steel plate, the outer diameter of the cover plate 2 is larger than the outer diameter of the tower 1, and at the same time, in order to facilitate the positioning of the cover plate on the tower, a frustum with a larger top and a smaller bottom can be welded at the bottom of the cover plate 2, and the outer diameter of the top of the frustum is smaller than the inner diameter of the tower 1, and the difference between the two can be 2-5CM.

[0022] A sealing structure 3 is provided between the cover plate 2 and the tower 1. The sealing structure 3 may be a rubber layer on the bottom surface of the cover plate 2, a rubber ring, or a rubber plate.

[0023] The bottom of the cover plate 2 is provided with a damping device. Preferably, in order to reduce costs, the damping device includes a steel wire rope 7 with one end fixed to the bottom of the cover plate 2, and a lug plate for fixing the steel wire rope 7 is welded to the bottom of the cover plate 2. A counterweight block 8 is fixed to the end of the steel wire rope 7 away from the cover plate 2, and a lug plate for fixing the steel wire rope 7 is also welded to the counterweight block 8. Further, one end of the steel wire rope 7 is fixed to the middle of the bottom of the cover plate 2, and the counterweight block 8 is a 5-ton iron ball.

[0024] Preferably, a manhole 4 is provided on the cover plate 2, and a sealing gasket is provided between the manhole cover and the cover plate 2, so that people can go up and down conveniently through the manhole.

[0025] Preferably, the cover plate 2 is provided with a plurality of lifting ears 5 , and four lifting ears 5 can be evenly welded along the circumference of the cover plate 2 to facilitate the lifting of the cover plate 2 .

[0026] Preferably, a guardrail 6 is welded to the edge of the top of the cover plate 2. The guardrail 6 is a fence with a height of 1.1 meters, which serves as a protection and is also convenient for construction workers to wear safety belts.

[0027] When one section of the tower installation is completed, due to gusts and other reasons, the tower or cabin installation cannot be continued. In order to prevent the installed tower from vortex-induced vibration, a crane is used to lift the cover plate 2 to the top of the installed tower. The personnel go up through the manhole 4 and remove the crane hook. The crane is retracted and away from the lifting site. When weather conditions permit, the cover plate 2 is lifted down by a crane. The tower or cabin installation work continues.

Claims

1. A wind turbine tower anti-sway device, characterized in that: It comprises a cover plate (2) covering the top of a tower (1), a sealing structure (3) is provided between the cover plate (2) and the tower (1), and a damping device is provided at the bottom of the cover plate (2).

2. The wind turbine tower anti-sway device according to claim 1, characterized in that: The sealing structure (3) is a rubber layer covering the bottom surface of the cover plate (2).

3. The wind turbine tower anti-sway device according to claim 1, characterized in that: The cover plate (2) is provided with a manhole (4).

4. The wind turbine tower anti-sway device according to claim 1, characterized in that: The cover plate (2) is provided with a plurality of lifting ears (5).

5. The wind turbine tower anti-sway device according to claim 1, characterized in that: A protective railing (6) is provided on the top of the cover plate (2).

6. The wind turbine tower anti-sway device according to claim 1, characterized in that: The damping device comprises a steel wire rope (7) with one end fixed to the bottom of the cover plate (2), and a counterweight (8) is fixed to the end of the steel wire rope (7) away from the cover plate (2).

7. The wind turbine tower anti-sway device according to claim 6, characterized in that: One end of the steel wire rope (7) is fixed to the middle of the bottom of the cover plate (2), and the counterweight (8) is an iron ball.

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