Wind power tuned mass damper

Abstract

The application relates to a wind power tuned mass damper applied in the field of energy dissipation and vibration reduction of a wind power tower drum, which comprises a mounting frame arranged in the wind power tower drum, a counterweight assembly connected to the mounting frame through an elastic assembly, and a first moving frame rollingly connected to the mounting frame; when the wind power tower drum vibrates, the counterweight assembly moves and drives the first moving frame to move. The application has the technical effect that the natural frequency of the counterweight assembly and the elastic assembly is highly consistent with the vibration frequency of the main structure of the wind power tower drum which needs to be controlled by accurately controlling the counterweight assembly and the elastic assembly; when the main structure of the wind power tower drum resonates due to wind load, earthquake or wave load, the counterweight assembly of the damper moves in the opposite direction of the vibration direction of the main structure to dissipate vibration energy, so that the resonance response of the main structure of the tower drum is efficiently weakened.

Description

Technical Field

[0001] This application relates to the field of wind turbine tower energy dissipation and vibration reduction technology, and in particular to a wind turbine tuned mass damper. Background Technology

[0002] The wind turbine tower, also known as the supporting tower of a wind turbine, is a key structural component of the wind turbine generator set, supporting the wind turbine generator set (nacelle, blades, etc.) in the air.

[0003] With the rapid development of wind power technology and the continuous evolution of wind turbines towards larger and taller towers, the environmental excitations experienced by wind turbine towers during operation are becoming increasingly complex. Especially under the combined effects of wind load, mechanical excitation, and vortex-induced vibration, the tower structure is prone to strong vibration responses. Related technologies typically incorporate dampers within the tower to reduce vibration. For example, a pendulum-type damping device can be installed inside the tower. When the tower vibrates, the pendulum 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 address the challenges of pendulum-type vibration damping, which requires a large swing space but has limited space within the tower, making installation difficult and increasing the complexity of tower damping device installation, this application provides a wind turbine tuned mass damper. The damper includes a mounting frame installed inside the wind turbine tower or nacelle. A counterweight assembly is connected to the mounting frame via an elastic component, and the counterweight assembly moves when the wind turbine tower vibrates.

[0006] In one specific implementation, a first annular movable frame is mounted on the mounting frame, and the first movable frame is located at the outer edge of the counterweight assembly; when the wind turbine tower vibrates, the counterweight assembly moves and drives the first movable frame to move.

[0007] In one specific implementation, the mounting frame is further provided with a ring-shaped second movable frame, the first movable frame is mounted on the second movable frame and the second movable frame is located between the mounting frame and the first movable frame; when the wind turbine tower vibrates, the counterweight assembly moves and drives the first movable frame and the second movable frame to move.

[0008] In one specific implementation, a first movable roller is rotatably connected to the first movable frame, and a first guide rail matching the first movable roller is provided on the second movable frame, with the first movable roller rotatably connected within the first guide rail; a second movable roller is rotatably connected to the second movable frame, and a second guide rail matching the second movable roller is provided on the mounting frame, with the second movable roller rotatably connected within the second guide rail, and the first guide rail and the second guide rail are perpendicular to each other.

[0009] In one specific implementation scheme, the second movable frame is provided with limiting plates on both sides, which are parallel to the first guide rail. The first movable frame is rotatably connected to the first transverse bearings on both sides. The limiting plates are located between the first transverse bearings and abut against the outer edge of the first transverse bearings respectively.

[0010] In one specific implementation scheme, limit blocks are provided at both ends of the first guide rail, and the first movable roller and the first transverse bearing are both located between the two limit blocks.

[0011] In one specific implementation scheme, the counterweight frame is provided with mounting bolts, and the first movable frame is provided with mounting grooves that match the mounting bolts. The end of the mounting bolt facing the first movable frame is threaded into the mounting groove.

[0012] In one specific implementation, the elastic component includes a plurality of mounting blocks disposed on a mounting frame, the plurality of mounting blocks being located on the outer side of the second movable frame, the plurality of mounting blocks being provided with a plurality of first elastic columns, and the ends of the plurality of first elastic columns facing away from the mounting frame being disposed on a counterweight frame.

[0013] In one specific implementation scheme, the mounting frame is provided with a support rod, and the support rod is provided with a plurality of second elastic columns. The ends of the plurality of second elastic columns opposite to the mounting frame are respectively set on the counterweight frame, and the plurality of second elastic columns are all located between the mounting frame and the second movable frame.

[0014] In one specific implementation, the second movable frame is provided with a connecting frame, and the connecting frame is provided with a third elastic column, the end of the third elastic column opposite to the second movable frame being disposed on the mounting frame.

[0015] In summary, this application has the following beneficial technical effects: when the wind turbine tower vibrates, the counterweight component moves relative to the mounting frame due to inertia, and under the constraint of the elastic component, the counterweight component is difficult to detach from the mounting frame during the movement, thereby achieving the damping effect of the counterweight component moving when the wind turbine tower vibrates; at the same time, compared with the traditional pendulum damper, the technical solution of this application can make more compact use of the vertical space of the tower or nacelle, reduce the requirements for horizontal space, and thus significantly reduce the installation difficulty of the damper. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a structural schematic diagram illustrating the first movable roller in an embodiment of this application.

[0018] Reference numerals in the attached drawings: 1. Mounting frame; 2. Counterweight assembly; 3. First movable frame; 4. Second movable frame; 5. First movable roller; 6. First guide rail; 7. Second movable roller; 8. Second guide rail; 9. Limiting plate; 10. First transverse bearing; 11. Limiting block; 12. Counterweight frame; 13. Mass block; 14. Mounting bolt; 15. Mounting block; 16. First elastic column; 17. Support rod; 18. Second elastic column; 19. Connecting frame; 20. Third elastic column. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0020] This application discloses a wind power tuned mass damper.

[0021] Reference Figure 1 and Figure 2 The wind turbine tuned mass damper includes a mounting frame 1 installed inside the wind turbine tower or nacelle. This allows the damper to be installed entirely inside the wind turbine tower or nacelle as needed. A counterweight assembly 2 is connected to the mounting frame 1 via an elastic component. When the wind turbine tower vibrates, the counterweight assembly 2 moves relative to the mounting frame 1 due to inertia. Under the constraint of the elastic component, the counterweight assembly 2 is unlikely to detach from the mounting frame 1 during movement, thus achieving a damping effect by moving the counterweight assembly 2 when the wind turbine tower vibrates. Furthermore, compared to traditional pendulum dampers, this technical solution utilizes the vertical space of the tower or nacelle more compactly, reducing the requirements for horizontal space and significantly lowering the installation difficulty of the damper.

[0022] Reference Figure 1 and Figure 2A ring-shaped first movable frame 3 can also be mounted on the mounting frame 1, located at the outer edge of the counterweight assembly 2. When the wind turbine tower vibrates, the counterweight assembly 2 moves, driving the first movable frame 3 to move. Therefore, when the wind turbine tower vibrates, the counterweight assembly 2 moves relative to the mounting frame 1 due to inertia, and the movement of the counterweight assembly 2 drives the first movable frame 3 to move. By precisely controlling the counterweight assembly 2 and the elastic component, their natural frequency is made highly consistent with the vibration frequency that needs to be controlled for the main structure of the wind turbine tower. When the main structure of the wind turbine tower resonates due to wind load, earthquake, or vehicle load, the counterweight assembly 2 of the damper will generate a movement opposite to the vibration direction of the main structure, dissipating vibration energy and thus effectively weakening the resonance response of the main structure of the tower.

[0023] Reference Figure 1 and Figure 2 The counterweight assembly 2 includes a counterweight frame 12 mounted on the mounting frame 1. Several stacked mass blocks 13 are bolted to the counterweight frame 12. The operator can precisely design the total mass of the additional mass blocks 13 by means of bolt connection. When assembling the counterweight assembly 2 inside the wind turbine tower, the counterweight frame 12 is first pre-fixed to the mounting frame 1 by bolting the assembly frame. Then, after the assembly is completed, the assembly frame is removed, so that the counterweight frame 12 can sway with the vibration of the wind turbine tower.

[0024] Reference Figure 1 and Figure 2 The counterweight frame 12 is provided with mounting bolts 14, and the first movable frame 3 is provided with mounting grooves that match the size of the mounting bolts 14. The end of the mounting bolts 14 facing the first movable frame 3 is threaded into the mounting groove. The operator can use the bolt connection to connect the counterweight frame 12 and the first movable frame 3, so that the counterweight frame 12 and the mass block 13 can stably transmit the force to the first movable frame 3 during the movement of the counterweight frame 12 and the mass block 13.

[0025] Reference Figure 1 and Figure 2 A second annular movable frame 4 can also be mounted on the mounting frame 1. The first movable frame 3 is mounted on the second movable frame 4, and the second movable frame 4 is located between the mounting frame 1 and the first movable frame 3. Specifically, the first movable frame 3 has a first roller part at each of its four corners. The first roller part includes a first movable roller 5 rotatably connected to the first movable frame 3. The second movable frame 4 is equipped with four first guide rails 6 that match the size of the first movable rollers 5. The four first movable rollers 5 are respectively rotatably connected to the four first guide rails 6. The setting of the first movable rollers 5 reduces the frictional resistance when the first movable frame 3 moves relative to the second movable frame 4, so that the first movable frame 3 can move stably under the drive of the counterweight component 2.

[0026] Reference Figure 1 and Figure 2The second movable frame 4 has two roller sections at its four corners. Each roller section includes a second movable roller 7 rotatably connected to the second movable frame 4. The mounting frame 1 has four second guide rails 8 that match the size of the second movable rollers 7. The four second movable rollers 7 are respectively rolled within the four second guide rails 8, and the first guide rails 6 and the second guide rails 8 are perpendicular to each other. Therefore, when the wind turbine tower vibrates, the mass block 13 moves relative to the mounting frame 1 due to inertia. The movement of the mass block 13 and the counterweight frame 12 drives the first movable frame 3 to move, causing the four first movable rollers 5 to be rolled within the four first guide rails 6, and the four second movable rollers 7 to be rolled within the four second guide rails 8, thus achieving a composite vector motion. This allows the counterweight assembly 2 to make displacements in any direction along the horizontal direction, thereby adjusting the vibration of the main tower structure from any direction.

[0027] Reference Figure 1 and Figure 2 The second movable frame 4 has limiting plates 9 installed on both sides, parallel to the first guide rail 6. The first movable frame 3 has first transverse bearings 10 rotatably connected to both sides. The limiting plates 9 are located between the first transverse bearings 10 and abut against the outer edges of the first transverse bearings 10. Limiting blocks 11 are bolted to both ends of the first guide rail 6. The first movable roller 5 and the first transverse bearing 10 are both located between the two limiting blocks 11. The limiting blocks 11 limit the positions of the first movable roller 5 and the first transverse bearing 10, reducing the possibility of the first movable roller 5 and the first transverse bearing 10 detaching from the first guide rail 6. In this embodiment, four limiting plates 9 and four first transverse bearings 10 are used as an example, corresponding to the number of first guide rails 6. The second movable frame 4 is equipped with second transverse bearings and limiting plates 9, corresponding to the structure of the first movable frame 3. The first transverse bearing 10 and the second transverse bearing mainly serve as limiters to ensure that the first moving frame 3 and the second moving frame 4 can maintain a mutually perpendicular sliding state under the restriction of the first transverse bearing 10 and the second transverse bearing, thereby realizing the vector synthesis of the vibration reduction process.

[0028] Reference Figure 1 and Figure 2The elastic component includes several mounting blocks 15 disposed on the mounting frame 1. In this embodiment, four mounting blocks 15 are used as an example. The four mounting blocks 15 are located on the outer side of the second movable frame 4. Several vertically arranged first elastic columns 16 are installed on the mounting blocks 15, and the ends of the first elastic columns 16 facing away from the mounting frame 1 are respectively disposed on the counterweight frame 12. A support rod 17 is bolted to the mounting frame 1. Several vertically arranged second elastic columns 18 are installed on the support rod 17. The ends of the second elastic columns 18 facing away from the mounting frame 1 are respectively disposed on the counterweight frame 12, and the second elastic columns 18 are all located between the mounting frame 1 and the second movable frame 4. A connecting frame 19 is bolted to the second movable frame 4. A vertically arranged third elastic column 20 is installed on the connecting frame 19, and the end of the third elastic column 20 facing away from the second movable frame 4 is disposed on the mounting frame 1. In this embodiment, the first elastic column 16, the second elastic column 18, and the third elastic column 20 are all made of vibration-damping rubber columns, which can provide a certain stiffness and play a damping role; according to the vibration frequency formula: When the mass m of the moving parts in the overall structure remains constant, ƒ has a linear relationship with k. Therefore, in the wind power tuned mass damper, the total stiffness k of the entire structure can be changed by adjusting the number of vibration damping rubber columns, thereby obtaining the corresponding frequency ƒ, which can adapt to the vibration excitation of the tower from low frequency to high frequency.

[0029] Furthermore, this wind turbine tuned mass damper is a passive control device. Its working principle relies on the mechanical motion of the "mass block 13 - vibration damping rubber column - damping" system, requiring no external power, hydraulic, or control system drive. This characteristic brings the following advantages: First, the overall structure is energy-independent, and it can still operate normally even in extreme scenarios such as power outages caused by earthquakes or typhoons, reducing the risk of active control devices failing due to power outages. The structure is simple and has a low failure rate. Second, the core components of the wind turbine tuned mass damper are only the mass block 13 and elastic components, without complex electronic components or software systems. It requires almost no maintenance during long-term operation, and its service life can be synchronized with the main structure. Moreover, most of the core components of this wind turbine tuned mass damper are rigid, resulting in lower production costs, a simple structure, and convenient assembly and disassembly. It requires no energy replenishment, only periodic lubrication and tightening, leading to low maintenance costs in the later stages.

[0030] The implementation principle of this application embodiment is as follows: When the wind turbine tower vibrates, the mass block 13 moves relative to the mounting frame 1 due to inertia. The movement of the mass block 13 and the counterweight frame 12 drives the first moving frame 3 and the second moving frame 4 to move, so that the four first moving rollers 5 are respectively rolled and connected in the four first guide rails 6, and the four second moving rollers 7 are respectively rolled and connected in the four second guide rails 8, thereby obtaining a composite vector motion. This allows the counterweight assembly 2 to make displacement in any direction along the horizontal direction, thereby adjusting the vibration of the main structure of the tower from any direction. During the movement of the first moving frame 3 and the second moving frame 4, the first elastic column 16, the second elastic column 18, and the third elastic column 20 are deformed. In the wind turbine tuned mass damper, the total stiffness of the entire structure is changed by adjusting the number or stiffness of the first elastic column 16, the second elastic column 18, and the third elastic column 20, thereby adapting to the vibration excitation of the tower from low frequency to high frequency. By precisely controlling the counterweight assembly 2 and the elastic assembly, their natural frequency is highly consistent with the vibration frequency that needs to be controlled in the main structure of the wind turbine tower. When the main structure of the wind turbine tower resonates due to wind load, earthquake or vehicle load, the counterweight component 2 of the damper will generate a motion opposite to the vibration direction of the main structure to dissipate vibration energy, thereby effectively weakening the resonance response of the main structure of the tower. At the same time, compared with the traditional pendulum damper, the technical solution of this application can make more compact use of the vertical space of the tower and reduce the requirements for horizontal space, thereby significantly reducing the installation difficulty.

[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 wind-tuned mass damper, characterized by: It includes a mounting frame (1) installed inside the wind turbine tower or nacelle, and a counterweight assembly (2) is connected to the mounting frame (1) via an elastic component. When the wind turbine tower vibrates, the counterweight assembly (2) moves.

2. The wind power tuned mass damper according to claim 1, characterized in that: The mounting frame (1) is equipped with a ring-shaped first movable frame (3), which is located on the outer edge of the counterweight assembly (2). When the wind turbine tower vibrates, the counterweight assembly (2) moves and drives the first movable frame (3) to move.

3. The wind power tuned mass damper according to claim 2, characterized in that: The mounting frame (1) is also equipped with a ring-shaped second movable frame (4), the first movable frame (3) is mounted on the second movable frame (4) and the second movable frame (4) is located between the mounting frame (1) and the first movable frame (3); when the wind turbine tower vibrates, the counterweight assembly (2) moves and drives the first movable frame (3) and the second movable frame (4) to move.

4. The wind power tuned mass damper according to claim 3, characterized in that: The first movable frame (3) is rotatably connected to a first movable roller (5), and the second movable frame (4) is provided with a first guide rail (6) that matches the first movable roller (5). The first movable roller (5) is rotatably connected to the first guide rail (6). The second movable frame (4) is rotatably connected to a second movable roller (7), and the mounting frame (1) is provided with a second guide rail (8) that matches the second movable roller (7). The second movable roller (7) is rotatably connected to the second guide rail (8). The first guide rail (6) and the second guide rail (8) are perpendicular to each other.

5. The wind power tuned mass damper according to claim 4, characterized in that: The second movable frame (4) is provided with limiting plates (9) on both sides, which are parallel to the first guide rail (6). The first movable frame (3) is rotatably connected to the first transverse bearings (10) on both sides. The limiting plates (9) are located between the first transverse bearings (10) and abut against the outer edge of the first transverse bearings (10).

6. The wind power tuned mass damper according to claim 5, characterized in that: The first guide rail (6) has limit blocks (11) at both ends, and the first moving roller (5) and the first transverse bearing (10) are located between the two limit blocks (11).

7. The wind power tuned mass damper according to claim 2, characterized in that: The counterweight frame (12) is provided with mounting bolts (14), and the first movable frame (3) is provided with mounting grooves that match the mounting bolts (14). The end of the mounting bolts (14) facing the first movable frame (3) is threaded into the mounting groove.

8. The wind power tuned mass damper according to claim 1, characterized in that: The elastic component includes a plurality of mounting blocks (15) disposed on the mounting frame (1), the plurality of mounting blocks (15) being located on the outer side of the second movable frame (4), the plurality of mounting blocks (15) being provided with a plurality of first elastic columns (16), and the ends of the plurality of first elastic columns (16) facing away from the mounting frame (1) being disposed on the counterweight frame (12).

9. The wind power tuned mass damper according to claim 8, characterized in that: The mounting frame (1) is provided with a support rod (17), and the support rod (17) is provided with a plurality of second elastic columns (18). The ends of the plurality of second elastic columns (18) away from the mounting frame (1) are respectively set on the counterweight frame (12), and the plurality of second elastic columns (18) are all located between the mounting frame (1) and the second movable frame (4).

10. The wind power tuned mass damper according to claim 3, characterized in that: The second movable frame (4) is provided with a connecting frame (19), and the connecting frame (19) is provided with a third elastic column (20). The end of the third elastic column (20) facing away from the second movable frame (4) is provided on the mounting frame (1).

Images