Wind driven generator single-layer network structure flexible vibration reduction damping cable and vibration reduction method

Abstract

The single-layer network structure flexible vibration attenuation damping cable comprises a plurality of supporting rods which are evenly arranged in the circumferential direction of a tower drum of the wind driven generator, the outer ends of the supporting rods are connected with a damper on a tower drum foundation through main cables, and the main cables are connected through auxiliary cables in the horizontal direction; by means of the multi-direction adaptability, the vibration control effect and stability of the device are improved, the device can adapt to different working conditions and environments, and safe operation of the wind driven generator is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine tower vibration reduction, in particular to a wind turbine single-layer network structure flexible vibration reduction damping cable and a vibration reduction method. Background Art

[0002] As the global demand for renewable energy continues to grow, the development of wind power generation technology has received increasing attention. However, wind turbines are often affected by factors such as wind speed changes and wind direction changes during operation, which can easily cause vibration and instability, thus affecting their power generation efficiency and lifespan. Therefore, studying and improving the vibration control device of wind turbines has become one of the current research hotspots.

[0003] At present, the principles of wind turbine vibration control devices mainly include traditional rigid structure control and active control. Traditional methods mainly rely on rigid structures or simple vibration reduction devices, such as vibration reduction springs, shock absorbers, etc., to reduce vibration by changing the rigid structure or using vibration absorbing materials. Active control, on the other hand, is to monitor the vibration of the wind turbine by installing sensors and adjust the vibration control device, such as a damper or an adjustment rod, in real time through a control unit to achieve vibration suppression and control. However, these vibration control devices still have some limitations. First, the traditional rigid structure control method is difficult to adapt to changes under different working conditions and vibration frequencies, and its effect is limited. Second, these methods often require a large amount of materials and complex manufacturing processes, resulting in high costs. In addition, some active control devices may consume a lot of energy and require additional maintenance and overhaul, which increases maintenance costs and downtime. Therefore, the current wind turbine vibration control device still has certain limitations in terms of efficiency, cost and reliability, and further technological breakthroughs and innovations are urgently needed to improve its performance and applicability. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a single-layer network structure flexible vibration reduction and damping cable of a wind turbine and a vibration reduction method to solve the problems raised in the background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a single-layer network structure flexible vibration-damping damping cable of a wind turbine, including a plurality of support rods evenly arranged along the circumferential direction of the wind turbine tower, the outer ends of the support rods are connected to the damper on the tower base through main cables, and the plurality of main cables are connected in the horizontal direction through auxiliary cables.

[0006] Preferably, the top of the damper is hinged to the bottom of the main cable through a top plate, and the bottom of the damper is fixedly connected to the outer edge of the tower foundation through a bottom plate.

[0007] Preferably, the main cable is in a vertical state, the auxiliary cable is in a horizontal state, and the main cable and the auxiliary cable are vertically connected to each other.

[0008] Preferably, the auxiliary rope is connected to the main rope in a winding manner.

[0009] Preferably, a plurality of auxiliary cables with equal spacing are distributed on the surface of the main cable from top to bottom.

[0010] Preferably, the plurality of support rods are evenly distributed in a circular array in the circumferential direction of the wind turbine tower.

[0011] Preferably, the plurality of support rods are in a horizontal state and located in the same horizontal plane.

[0012] Preferably, the number of the support rods is six, the number of main cables corresponding to the outer ends of the support rods is six, and the projection of the tower foundation in the vertical direction is a regular hexagon.

[0013] In addition, the present invention also discloses a vibration reduction method for the above-mentioned wind turbine single-layer network structure flexible vibration reduction and damping cable, which comprises the following steps: S1. When a wind turbine is subjected to external wind force or other vibration sources, the vibration will be transmitted to the main cable and auxiliary cable through the wind turbine tower; S2. The network structure formed by the main cables and auxiliary cables can flexibly move and deform in the horizontal and vertical directions, adapt to vibrations in multiple directions, and absorb and slow down vibration energy through its flexibility and elasticity, thereby reducing the vibration amplitude of the wind turbine; S3. Dampers are auxiliary devices that can further control the vibration amplitude.

[0014] Beneficial effects of the present invention: 1. The present invention can flexibly adapt to different vibration and stress conditions in multiple directions. Through the design of flexible cables, including horizontal support rods, vertical main cables and horizontal auxiliary cables, the device forms a network structure, which enables the flexible cables to move and deform freely in the horizontal and vertical directions; this design enables the device to effectively absorb and disperse vibration energy from all directions, whether it is from wind force or vibration generated by the operation of the wind turbine itself, it can be effectively controlled; multi-directional adaptability not only improves the vibration control effect and stability of the device, but also enables it to adapt to different working conditions and environments, ensuring the safe operation of the wind turbine.

[0015] 2. The present invention combines the parallel setting of the damper and the flexible cable network, so that it can more effectively absorb and mitigate the vibration energy generated by the wind turbine; the design of the flexible cable network can fully absorb the vibration energy in the horizontal and vertical directions, and at the same time the setting of the damper can further mitigate the vibration by introducing damping force, thereby achieving vibration control and recovery; through this combined setting, the device can not only reduce the amplitude and frequency of the vibration, but also quickly restore to the original state, thereby ensuring the stable operation of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a vertical cross-sectional structural schematic diagram of a single-layer network structure flexible vibration reduction and damping cable of a wind turbine; Figure 2 for Figure 1 A schematic diagram of a top view of the structure in which the middle support rod is arranged in the circumferential direction of the wind turbine tower 1; Figure 3 for Figure 1 A partial enlarged view of the middle damper part. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Example 1: Figure 1-3 As shown, a single-layer network structure flexible vibration-damping cable for a wind turbine comprises a plurality of support rods 2 evenly arranged along the circumferential direction of a wind turbine tower 1, wherein the outer ends of the support rods 2 are connected to a damper 5 on a tower foundation 8 via a main cable 3, and the plurality of main cables 3 are connected in the horizontal direction via auxiliary cables 4.

[0019] Preferably, the top of the damper 5 is hinged to the bottom of the main cable 3 through a top plate 6 , and the bottom of the damper 5 is fixedly connected to the outer edge of the tower foundation 8 through a bottom plate 7 .

[0020] Preferably, the main cable 3 is in a vertical state, the auxiliary cable 4 is in a horizontal state, and the main cable 3 and the auxiliary cable 4 are vertically connected to each other. This vertical connection method can make the force and the force distribution more uniform, and can improve its vibration reduction effect.

[0021] Preferably, the auxiliary rope 4 is connected to the main rope 3 in a winding manner. In the actual installation process, when the auxiliary rope 4 is connected to the main rope 3, the auxiliary rope 4 can be firstly wound around the surface of one of the main ropes 3 for one or several turns, and then wound around the surface of another main rope 3 for one or several turns, and so on, to complete the winding and connection process of all the main ropes 3.

[0022] Preferably, a plurality of auxiliary cables 4 with equal spacing are distributed from top to bottom on the surface of the main cable 3. After such distribution, a three-dimensional network structure can be formed from top to bottom, so that it can adapt to vibrations in multiple directions, absorb and slow down vibration energy through its flexibility and elasticity, thereby reducing the vibration amplitude of the wind turbine.

[0023] Preferably, the plurality of support rods 2 are evenly distributed in a circular array in the circumferential direction of the wind turbine tower 1 .

[0024] Preferably, the plurality of support rods 2 are in a horizontal state and are located on the same horizontal plane.

[0025] Preferably, the number of the support rods 2 is six, the number of the main cables 3 corresponding to the outer ends of the support rods 2 is six, and the vertical projection of the tower foundation 8 is a regular hexagon.

[0026] The working principle of embodiment 1 is as follows: When the wind turbine is affected by external wind or other vibration sources, the vibration will be transmitted to the main cable 3 and the auxiliary cable 4 through the wind turbine tower 1. The main cable 3 and the auxiliary cable 4 are the main absorbers of vibration. Through their flexibility and elasticity, they can effectively absorb and slow down the vibration energy, thereby reducing the vibration amplitude of the wind turbine; the damper, as an auxiliary device, can further control the vibration; the network structure formed by the main cable 3 and the auxiliary cable 4 can flexibly move and deform in the horizontal and vertical directions, adapt to vibrations in multiple directions, and improve the applicability and stability of the device.

[0027] Embodiment 2: A vibration reduction method for a wind turbine single-layer network structure flexible vibration reduction and damping cable, comprising the following steps: S1. When the wind turbine is affected by external wind or other vibration sources, the vibration will be transmitted to the main cable 3 and the auxiliary cable 4 through the wind turbine tower 1; The network structure (i.e., a ring-shaped network structure) formed by connecting S2, the main cable 3, and the auxiliary cable 4 can flexibly move and deform in the horizontal and vertical directions, adapt to vibrations in multiple directions, and absorb and slow down vibration energy through its flexibility and elasticity, thereby reducing the vibration amplitude of the wind turbine; S3, damper 5 as an auxiliary device, can further control the vibration amplitude.

[0028] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A single-layer network structure flexible vibration damping cable for a wind turbine, characterized in that: It comprises a plurality of support rods (2) uniformly arranged along the circumferential direction of a wind turbine tower (1), wherein the outer ends of the support rods (2) are connected to a damper (5) on a tower foundation (8) via a main cable (3), and the plurality of main cables (3) are connected in the horizontal direction via a secondary cable (4).

2. According to claim 1, a single-layer network structure flexible vibration damping cable for a wind turbine generator, characterized in that: The top of the damper (5) is hinged to the bottom of the main cable (3) via a top plate (6), and the bottom of the damper (5) is fixedly connected to the outer edge of the tower foundation (8) via a bottom plate (7).

3. The single-layer network structure flexible vibration damping cable of a wind turbine according to claim 1, characterized in that: The main cable (3) is in a vertical state, the auxiliary cable (4) is in a horizontal state, and the main cable (3) and the auxiliary cable (4) are vertically connected to each other.

4. The single-layer network structure flexible vibration damping cable of a wind turbine according to claim 1, characterized in that: The auxiliary rope (4) is connected to the main rope (3) in a winding manner.

5. The single-layer network structure flexible vibration damping cable of a wind turbine according to claim 4, characterized in that: A plurality of auxiliary cables (4) with equal spacing are distributed from top to bottom on the surface of the main cable (3).

6. The single-layer network structure flexible vibration damping cable of a wind turbine according to claim 1, characterized in that: The plurality of support rods (2) are evenly distributed in a circular array in the circumferential direction of the wind turbine tower (1).

7. The single-layer network structure flexible vibration-reducing and damping cable of a wind turbine according to claim 6, characterized in that: The plurality of support rods (2) are in a horizontal state and are located on the same horizontal plane.

8. The single-layer network structure flexible vibration damping cable of a wind turbine according to claim 7, characterized in that: The number of the support rods (2) is six, the number of the main cables (3) corresponding to the outer ends of the support rods (2) is six, and the vertical projection of the tower foundation (8) is a regular hexagon.

9. A vibration reduction method for a wind turbine generator single-layer network structure flexible vibration reduction and damping cable according to any one of claims 1 to 8, characterized in that: It includes the following steps: S1. When the wind turbine is subjected to external wind force or other vibration sources, the vibration is transmitted to the main cable (3) and the auxiliary cable (4) through the wind turbine tower (1); The network structure formed by connecting S2, the main cable (3) and the auxiliary cable (4) can flexibly move and deform in the horizontal and vertical directions, adapt to vibrations in multiple directions, and absorb and slow down vibration energy through its flexibility and elasticity, thereby reducing the vibration amplitude of the wind turbine; S3, damper (5) as an auxiliary device, can further control the vibration amplitude.

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