Swing type damper
By installing a supporting structure and a frequency modulation unit on the inner wall of the tower and adjusting the swing frequency, the problems of increased cost and low space utilization caused by excessive pendulum length are solved, and an effective vibration reduction effect is achieved at low frequency.
Patent Information
- Application Number
- CN202510919217.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-04
- Publication Date
- 2025-09-26
AI Technical Summary
When the main structure frequency of the existing swing damper is low, the swing length is too long, resulting in increased costs, low utilization of the tower internal space, and poor vibration reduction effect.
By installing a supporting structure on the inner wall of the tower, connecting the swing arm unit, and using the frequency modulation unit to adjust the swing frequency, including connecting bolts, mass blocks, transmission components and flywheels, the swing effect of the swing arm unit is optimized, the system inertia is increased and the swing frequency is reduced.
The pendulum length is adjusted within a reasonable range to achieve frequency adaptation between the damper and the tower, and inertia force is used for vibration reduction, which improves the vibration reduction effect and avoids cost increase and space waste.
Smart Images
Figure CN120701702A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of wind power vibration reduction, and in particular to a swing damper. Background Art
[0002] A swing damper is a device used to reduce the tower's swing amplitude due to wind or other external forces. The swing frequency of a swing damper is affected by factors such as pendulum length and mass. The damper achieves optimal vibration reduction when the swing frequency is close to the main structural frequency, forming a resonance.
[0003] A swing damper typically consists of a pendulum frame made up of several stacked masses, and a connection structure connecting the pendulum frame to the tower body. The tower's swing drives the pendulum frame, achieving vibration reduction through a transmission mechanism.
[0004] The pendulum frame length of the existing swing damper, i.e. the pendulum length, will become very long when the main structure frequency is low. Excessive pendulum length will lead to a series of problems such as increased cost, low utilization of the internal space of the tower, and poor vibration reduction effect. Summary of the Invention
[0005] In order to help solve a series of problems of existing swing dampers such as excessive swing length when the main structure frequency is low, resulting in increased costs, low utilization of the internal space of the tower, and poor vibration reduction effect, the present application provides a swing damper, which adopts the following technical solution: it includes a support structure installed on the inner wall of the tower, a swing arm unit is connected to the support structure, and a frequency modulation unit for adjusting the swing frequency is provided on the swing arm unit and the support structure.
[0006] Through the above technical solution, when the tower with a lower main structure frequency swings, the tower drives the swing arm unit to swing. When the swing length is within a reasonable range and the influence of gravity is not changed, the frequency modulation unit is used to optimize the swing effect of the swing arm unit while increasing the inertia of the system and reducing the swing frequency of the swing arm, thereby achieving damping while facilitating the response to the lower main structure frequency.
[0007] In a specific feasible implementation scheme, the frequency modulation unit includes a connecting bolt and several mass blocks arranged on the swing arm, each of the mass blocks is provided with a first connecting hole, and the swing arm is provided with a second connecting hole. The connecting bolt passes through the first connecting hole and the second connecting hole in sequence, and the outer edge of the connecting bolt is threadedly connected to a connecting nut, and the connecting nut is pressed against the swing arm with its surface facing the swing arm.
[0008] Through the above technical solution, the operator can remove the mass block from the swing arm by disassembling the bolts, so that the number of mass blocks can be set according to the actual size and model of the tower, which is convenient for adjusting the swing frequency of the swing arm.
[0009] In a specific feasible implementation scheme, the frequency modulation unit includes a main connecting shaft rotatably connected to a support structure, the swing arm is fixedly sleeved on the outer edge of the main connecting shaft, a slave connecting shaft is provided on the support structure, and a plurality of first flywheels are connected to one end of the slave connecting shaft away from the support structure, and the main connecting shaft and the slave connecting shaft are connected by a transmission assembly; when the swing arm swings, the main connecting shaft rotates synchronously with the plurality of first flywheels.
[0010] Through the above technical solution, when the swing arm generates a two-dimensional swing in a single direction along the center of the connection point between the swing arm and the supporting structure, the swing arm swings synchronously with the main connecting shaft, and the transmission component is used to rotate the main connecting shaft to drive the synchronous rotation of several first flywheels. When the several first flywheels rotate, the inertia of the system is increased and the swing frequency of the swing arm is reduced, which is convenient for coping with the lower main structure frequency.
[0011] In a specific possible implementation scheme, the transmission assembly includes a main gear arranged at the end of the main connecting shaft away from the supporting structure, a slave gear matching the main gear is rotatably connected to the slave connecting shaft, the main gear is meshed with the slave gear, and the end of the slave gear away from the supporting structure is fixedly connected to the first flywheel shaft, and a plurality of the first flywheel plates are arranged at the end of the first flywheel shaft away from the supporting structure.
[0012] Through the above technical solution, when the swing arm generates a unidirectional two-dimensional swing along the center of the connection point between the swing arm and the supporting structure, the swing arm and the main connecting shaft swing synchronously, and the rotation of the main connecting shaft drives the main gear to rotate. Since the main gear is engaged with the slave gear, it drives the slave gear to rotate. The rotation of the slave gear drives the first flywheel shaft to rotate, thereby rotating several first flywheel plates. When several first flywheel plates rotate, the inertia of the system will be increased and the swing frequency of the swing arm will be reduced, which is convenient for coping with the lower main structure frequency.
[0013] In a specific feasible implementation scheme, the frequency modulation unit includes a first mounting shaft connected to the support structure through a joint bearing, the swing arm is fixedly arranged on the first mounting shaft, the swing arm is provided with a first mounting bracket, the support structure is provided with a first screw rod, the first nut of the first screw rod is rotatably connected to the first mounting bracket, and the outer edge fixed sleeve of the first nut of the first screw rod is provided with a plurality of second flywheel pieces.
[0014] Through the above technical solution, when the swing arm generates a unidirectional two-dimensional swing along the center of the connection point between the swing arm and the supporting structure, the swing arm swings synchronously with the first mounting shaft, driving the first mounting frame to swing. Since the first screw rod is arranged on the inner wall of the tower, when the first mounting frame swings, the first nut of the first screw rod is driven to move along the direction of the first screw rod and the first nut will rotate. The rotation of the first nut drives the rotation of several second flywheel pieces. When the several second flywheel pieces rotate, the inertia of the system will be increased and the swing frequency of the swing arm will be reduced, so as to cope with the lower main structure frequency.
[0015] In a specific feasible implementation scheme, the frequency modulation unit includes a second mounting shaft connected to the support structure through a joint bearing, the swing arm is fixedly set on the second mounting shaft, a second mounting bracket is provided on the swing arm, a second screw rod is rotatably connected to the support structure, the second nut of the second screw rod is fixedly set on the second mounting bracket, and a plurality of third flywheel pieces are solidly sleeved on the second screw rod.
[0016] Through the above technical solution, when the swing arm generates a unidirectional two-dimensional swing along the center of the connection point between the swing arm and the supporting structure, the swing arm swings synchronously with the second mounting shaft, driving the second mounting frame to swing, and the second mounting frame drives the second nut to move along the axial direction of the second screw rod. While the position of the second nut moves, it drives the second screw rod to rotate, thereby driving the rotation of several third flywheel pieces on the second screw rod. When the several third flywheel pieces rotate, the inertia of the system will be increased and the swing frequency of the swing arm will be reduced, which is convenient for coping with the lower main structure frequency.
[0017] In a specific feasible implementation scheme, the frequency modulation unit includes a first transmission seat rotatably connected to the swing arm, the first transmission seat is hinged to a first transmission rod at one end facing away from the swing arm, a first support frame is provided on the first transmission rod, a first support rod is ball-hinged on the inner wall of the tower and the first support frame is slidingly connected to the first support rod, a rack is provided on the first support rod, a second flywheel shaft is rotatably connected to the first support frame, the second flywheel shaft is provided with a gear matching the rack at one end facing the first support rod, the gear is meshed with the rack, and a plurality of fourth flywheel plates are provided at one end of the second flywheel shaft facing away from the first support rod.
[0018] Through the above technical solution, when the swing arm generates a multi-directional three-dimensional swing along the center of the connection point between the swing arm and the support structure, the swing of the swing arm drives the first transmission seat to move, and drives the first transmission rod to move along with the swing of the swing arm, so that the first transmission rod drives the first support frame to move. Since the first support frame is slidingly connected to the first support rod and the first support rod is ball-hinged with the inner wall of the tower, the movement of the first support frame drives the first support rod to swing. While the first support frame moves in the direction of the first support rod, it drives the gear to move in the direction of the rack, driving the gear to rotate, thereby driving the second flywheel shaft and several fourth flywheel plates to rotate synchronously. When the several fourth flywheel plates rotate, it will increase the inertia of the system and reduce the swing frequency of the swing arm, which is convenient for coping with the lower main structure frequency.
[0019] In a specific implementation scheme, a roller bearing is rotatably connected to the first support frame, a rolling groove matching the roller bearing is formed on the surface of the first support rod facing the roller bearing, and the roller bearing is slidably connected in the rolling groove.
[0020] Through the above technical solution, the rolling groove limits the position of the roller bearing, so that the roller bearing can only slide along the direction of the rolling groove, thereby limiting the position of the first support frame, reducing the possibility of the first support frame deviating from the first support rod, and improving the stability of the first support frame during movement.
[0021] In a specific feasible implementation scheme, the frequency modulation unit includes a second transmission seat rotatably connected to the swing arm, the second transmission seat is hingedly connected to the second transmission rod at one end facing away from the swing arm, a second support frame is provided on the second transmission rod, a second support rod is ball-hinged on the inner wall of the tower, and the second support frame is slidably connected to the second support rod, the first roller, the second roller and the third roller are rotatably connected to the second support frame in sequence, the second support rod is provided with a synchronous belt, both ends of the synchronous belt are arranged on the second support rod, and the synchronous belt is tightened and wrapped around the first roller, the second roller and the third roller in sequence, the third flywheel shaft is rotatably connected to the second support frame, the second rolling wheel is arranged at one end of the third flywheel shaft facing the second support rod, and a plurality of fifth flywheel plates are provided at one end of the third flywheel shaft facing away from the second support rod.
[0022] Through the above technical solution, when the swing arm generates a multi-directional three-dimensional swing along the center of the connection point between the swing arm and the support structure, the swing of the swing arm drives the second transmission seat position to move, and drives the second transmission rod to move along with the swing of the swing arm, so that the second transmission rod drives the second support frame to move. Since the second support frame is slidingly connected to the second support rod and the second support rod is ball-hinged to the inner wall of the tower, the movement of the second support frame drives the second support rod to swing. Since the two ends of the synchronous belt are arranged on the second support rod, the second support frame drives the first rolling wheel, the second rolling wheel and the third rolling wheel to rotate synchronously while moving along the second support rod. The rotation of the second rolling wheel drives the third flywheel shaft to rotate, thereby driving the rotation of several fifth flywheel pieces on the third flywheel shaft. When several fifth flywheel pieces rotate, it will increase the inertia of the system and reduce the swing frequency of the swing arm, which is convenient for coping with lower main structure frequencies.
[0023] The transmission gear of the present invention is a gear which is connected to the first gear and the gear is connected with the gear to be driven by the third gear of the transmission gear, and the gear is connected with the gear to be driven by the third gear of the transmission gear.
[0024] Through the above technical solution, when the swing arm generates a multi-directional three-dimensional swing along the center of the connection point between the swing arm and the support structure, the swing of the swing arm drives the third transmission seat position to move, and drives the third transmission rod to move along with the swing of the swing arm, so that the third transmission rod drives the third support frame to move. Since the third support frame is slidingly connected to the third support rod and the third support rod is ball-hinged with the inner wall of the tower, the movement of the third support frame drives the third support rod to swing. Since the two ends of the chain are set on the third support rod, the third support frame drives the first sprocket, the second sprocket and the third sprocket to rotate synchronously while moving along the third support rod. The rotation of the second sprocket drives the fourth flywheel shaft to rotate, thereby driving the rotation of several sixth flywheel pieces on the fourth flywheel shaft. When several sixth flywheel pieces rotate, it will increase the inertia of the system and reduce the swing frequency of the swing arm, which is convenient for coping with the lower main structure frequency.
[0025] To sum up, the present application has at least the following beneficial technical effects: the pendulum length of the damper is within a reasonable range, and the swing frequency of the swing arm unit is adjusted to adapt to the frequency of the tower through the frequency modulation unit; thus, when the tower with a lower main structure frequency swings, the tower uses the inertia force generated by the swing arm unit to reduce vibration, thereby achieving a damping effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram used to reflect the first flywheel in Example 1 of the present application.
[0027] Figure 2 It is a structural diagram for reflecting the second flywheel in the second embodiment of the present application.
[0028] Figure 3 It is a structural diagram used to reflect the fourth flywheel in Example 4 of the present application.
[0029] Figure 4 It is a structural diagram used to reflect the second flywheel shaft in Example 4 of the present application.
[0030] Figure 5 It is a structural diagram used to reflect the synchronous belt in Example 5 of the present application.
[0031] Figure numerals: 1. supporting structure; 2. swing arm; 3. main connecting shaft; 4. slave connecting shaft; 5. first flywheel; 6. transmission assembly; 7. main gear; 8. slave gear; 9. first flywheel shaft; 10. mass block; 11. first mounting frame; 12. first screw rod; 13. second flywheel; 14. first transmission seat; 15. first transmission rod; 16. first supporting frame; 17. first support rod; 18. rack; 19. second flywheel shaft; 20. gear; 21. fourth flywheel; 22. first rolling wheel; 23. second rolling wheel; 24. third rolling wheel; 25. second support rod; 26. synchronous belt; 27. connecting bolt; 28. connecting nut. DETAILED DESCRIPTION
[0032] The following is combined with Figure 1-5 This application is described in further detail.
[0033] The embodiment of the present application discloses a swing damper.
[0034] Reference Figure 1 The swing damper includes a support structure 1 installed on the inner wall of the tower. In the embodiment of the present application, the support structure 1 can be a beam, a flange or a platform. A swing arm unit is connected to the support structure 1, and the swing arm unit includes a swing arm 2 and a connecting bolt 27 and a plurality of mass blocks 10 arranged on the swing arm 2. The swing arm unit and the support structure are provided with a frequency modulation unit for adjusting the swing frequency. The swing arm unit includes a swing arm 2 and a connecting bolt 27 and a plurality of mass blocks 10 arranged on the swing arm 2. A first connecting hole is opened on the plurality of mass blocks 10, and a second connecting hole is opened on the swing arm 2. The connecting bolt 27 passes through the first connecting hole and the second connecting hole in sequence. The outer edge of the connecting bolt 27 is threadedly connected with a connecting nut 28, and the connecting nut 28 is pressed against the swing arm 2 facing the surface of the swing arm 2. The operator can remove the mass block 10 from the swing arm 2 by disassembling the bolts, so that the number of mass blocks 10 can be set according to the actual frequency of the tower, so as to facilitate the adjustment of the swing frequency of the swing arm 2.
[0035] Therefore, the pendulum length of the damper is within a reasonable range, and the swing frequency of the swing arm unit is adjusted to adapt to the frequency of the tower through the frequency modulation unit; thus, when the tower with a lower main structure frequency swings, the tower uses the inertia force generated by the swing arm unit to reduce vibration, thereby achieving a damping effect.
[0036] Regarding the unidirectional two-dimensional swinging of the swing arm 2 along the center of the connection point between the swing arm 2 and the support structure 1, this application provides three implementation methods, as follows:
[0037] Example 1
[0038] Reference Figure 1The frequency modulation unit includes a main connecting shaft 3 rotatably connected to the support structure 1. In the embodiment of the present application, a bearing can be installed between the support structure 1 and the main connecting shaft 3. The bearing can support and position the main connecting shaft 3, bear the load, and reduce friction loss. The swing arm 2 is fixedly sleeved on the outer edge of the main connecting shaft 3. A slave connecting shaft 4 is installed on the support structure 1. A plurality of first flywheels 5 are connected to the end of the slave connecting shaft 4 away from the support structure 1. The main connecting shaft 3 and the slave connecting shaft 4 are connected by a transmission assembly 6. When the swing arm 2 swings, the main connecting shaft 3 rotates synchronously with the plurality of first flywheels 5. The transmission assembly 6 includes a main gear 7 arranged at the end of the main connecting shaft 3 away from the support structure 1, a slave gear 8 matching the main gear 7 is rotatably connected to the slave connecting shaft 4, and the main gear 7 is meshed with the slave gear 8. The end of the slave gear 8 away from the support structure 1 is fixedly connected to the first flywheel shaft 9, and a plurality of first flywheels 5 are arranged at the end of the first flywheel shaft 9 away from the support structure 1.
[0039] The implementation principle of the first embodiment of the present application is: when the swing arm 2 generates a unidirectional two-dimensional swing along the center of the connection point between the swing arm 2 and the support structure 1, the swing of the swing arm 2 will drive the main connecting shaft 3 to rotate synchronously, and the rotation of the main connecting shaft 3 will drive the main gear 7 to rotate. Since the main gear 7 is meshed and connected with the slave gear 8, it drives the slave gear 8 to rotate. The rotation of the slave gear 8 drives the first flywheel shaft 9 to rotate, thereby rotating several first flywheel plates 5. When several first flywheel plates 5 rotate, the inertia of the system will increase and the swing frequency of the swing arm 2 will be reduced, so as to cope with the lower main structure frequency.
[0040] Example 2
[0041] Reference Figure 2 The frequency modulation unit includes a first mounting shaft connected to the support structure 1 through a joint bearing. The joint bearing is a spherical sliding bearing whose sliding contact surface consists of an inner sphere and an outer sphere. This structure allows the joint bearing to rotate and swing at any angle during movement. The swing arm 2 is fixedly set on the first mounting shaft. A first mounting frame 11 is installed on the swing arm 2. A first screw rod 12 is installed on the support structure 1. The first nut of the first screw rod 12 is rotatably connected to the first mounting frame 11. The outer edge of the first nut of the first screw rod 12 is fixedly sleeved with a plurality of second flywheel pieces 13. In the embodiment of the present application, a bearing can be set between the first mounting frame 11 and the first nut of the first screw rod 12. The bearing can support and position the main connecting shaft 3, bear the load, and reduce friction loss.
[0042] The implementation principle of the second embodiment of the present application is: when the swing arm 2 generates a unidirectional two-dimensional swing along the center of the connection point between the swing arm 2 and the support structure 1, the swing arm 2 swings synchronously with the first mounting axis, driving the first mounting frame 11 to swing. Since the first screw rod 12 is set on the support structure 1, when the first mounting frame 11 swings, the first nut that drives the first screw rod 12 to move along the direction of the first screw rod 12 will rotate. The rotation of the first nut drives the rotation of the plurality of second flywheel pieces 13. When the plurality of second flywheel pieces 13 rotate, it will increase the inertia of the system and reduce the swing frequency of the swing arm 2, so as to cope with the lower main structure frequency.
[0043] Example 3
[0044] The frequency modulation unit includes a second mounting shaft connected to the support structure 1 through a joint bearing, the swing arm 2 is fixedly set on the second mounting shaft, the swing arm 2 is bolted to a second mounting frame, the support structure 1 is rotatably connected to a second screw rod, the second nut of the second screw rod is fixedly set on the second mounting frame, and a plurality of third flywheel pieces are set on the outer edge solid sleeve of the second screw rod.
[0045] The implementation principle of the third embodiment of the present application is: when the swing arm 2 generates a unidirectional two-dimensional swing along the center of the connection point between the swing arm 2 and the support structure 1, the swing arm 2 swings synchronously with the second mounting shaft, driving the second mounting frame to swing, and the second mounting frame drives the second nut to move along the axial direction of the second screw rod. While the position of the second nut moves, it drives the second screw rod to rotate, thereby driving several third flywheel pieces on the outer edge of the second screw rod to rotate. When several third flywheel pieces rotate, they will increase the inertia of the system and reduce the swing frequency of the swing arm 2, so as to cope with the lower main structure frequency.
[0046] Regarding the multi-directional three-dimensional swinging of the swing arm 2 along the center of the connection point between the swing arm 2 and the support structure 1, this application provides three implementation methods, as follows:
[0047] Example 4
[0048] Reference Figure 3 and Figure 4 The frequency modulation unit includes a first transmission seat 14 rotatably connected to the swing arm 2, a first transmission rod 15 is hinged on the end of the first transmission seat 14 away from the swing arm 2, a first support frame 16 is bolted to the first transmission rod 15, a first support rod 17 is ball-hinged on the inner wall of the tower, and the first support frame 16 is slidably connected to the first support rod 17, a rack 18 is bolted to the first support rod 17, a second flywheel shaft 19 is rotatably connected to the first support frame 16, and a gear 20 matching the rack 18 is provided on the end of the second flywheel shaft 19 facing the first support rod 17, the gear 20 is meshed with the rack 18, and a plurality of fourth flywheel pieces 21 are provided on the end of the rotating axis of the second flywheel shaft 19 away from the first support rod 17.
[0049] Reference Figure 3 and Figure 4 A roller bearing is rotatably connected to the first support frame 16. A rolling groove matching the roller bearing's size is defined on the surface of the first support rod 17 facing the roller bearing, and the roller bearing slides within the rolling groove. Therefore, the rolling groove limits the position of the roller bearing, forcing it to slide only along the direction of the rolling groove. This limits the position of the first support frame 16, reducing the possibility of the first support frame 16 deviating from the first support rod 17 and improving the stability of the first support frame 16 during movement.
[0050] The implementation principle of the fourth embodiment of the present application is: when the swing arm 2 generates a multi-directional three-dimensional swing along the center of the connection point between the swing arm 2 and the support structure 1, the swing of the swing arm 2 drives the first transmission seat 14 to move, and drives the first transmission rod 15 to move along with the swing of the swing arm 2, so that the first transmission rod 15 drives the first support frame 16 to move. Since the first support frame 16 is slidingly connected to the first support rod 17 and the first support rod 17 is ball-hinged with the inner wall of the tower, the movement of the first support frame 16 drives the first support rod 17 to swing. While the first support frame 16 moves in the direction of the first support rod 17, it drives the gear 20 to move in the direction of the rack 18, driving the gear 20 to rotate. The rotation of the gear 20 drives the second flywheel shaft 19 to rotate, thereby driving the rotation of several fourth flywheel plates 21 on the second flywheel shaft 19. When the several fourth flywheel plates 21 rotate, it will increase the inertia of the system and reduce the swing frequency of the swing arm 2, so as to cope with the lower main structure frequency.
[0051] Example 5
[0052] Reference Figure 3 and Figure 5 The first gear 22 is connected to the transmission gear 21 and the transmission gear 22 is connected to the transmission gear 21 through 3. The transmission gear 22 is connected to the transmission gear 21 by a bolt, and the transmission gear 22 is connected to the transmission gear 21 at a predetermined time.
[0053] The implementation principle of the fifth embodiment of the present application is: when the swing arm 2 generates a multi-directional three-dimensional swing along the center of the connection point between the swing arm 2 and the support structure 1, the swing of the swing arm 2 drives the second transmission seat position to move, and drives the second transmission rod to move along with the swing of the swing arm 2, so that the second transmission rod drives the second support frame to move. Since the second support frame is slidingly connected to the second support rod 25 and the second support rod 25 is ball-hinged with the inner wall of the tower, the movement of the second support frame drives the second support rod 25 to swing. Since the two ends of the synchronous belt 26 are set on the second support rod 25, the second support frame moves along the second support rod 25 while driving the first rolling wheel 22, the second rolling wheel 23 and the third rolling wheel 24 to rotate synchronously. The rotation of the second rolling wheel 23 drives the third flywheel shaft to rotate, thereby driving the rotation of several fifth flywheel plates. When several fifth flywheel plates rotate, it will increase the inertia of the system and reduce the swing frequency of the swing arm 2, which is convenient for coping with the lower main structure frequency.
[0054] Example 6
[0055] The transmission gear is hinged on the 3rd gear and is connected with the 3rd gear of 3rd gear.The transmission gear is hinged on the 3rd gear and is connected with the 3rd gear of 3rd gear in the transmission gear.
[0056] The implementation principle of the sixth embodiment of the present application is: when the swing arm 2 generates a multi-directional three-dimensional swing along the center of the connection point between the swing arm 2 and the support structure 1, the swing of the swing arm 2 drives the third transmission seat position to move, and drives the third transmission rod to move along with the swing of the swing arm 2, so that the third transmission rod drives the third support frame to move. Since the third support frame is slidingly connected to the third support rod and the third support rod is ball-hinged with the inner wall of the tower, the movement of the third support frame drives the third support rod to swing. The two ends of the chain are set on the third support rod. While the third support frame moves along the third support rod, it drives the first sprocket, the second sprocket and the third sprocket to rotate synchronously. The rotation of the second sprocket drives the fourth flywheel shaft to rotate, thereby driving the rotation of several sixth flywheel pieces on the fourth flywheel shaft. When several sixth flywheel pieces rotate, it will increase the inertia of the system and reduce the swing frequency of the swing arm 2, so as to cope with the lower main structure frequency.
[0057] According to the calculation formula of the swing arm:
[0058]
[0059] In the above formula: ω is the oscillation frequency; l m is the distance from the center of the swing to the center of the mass block; m is the mass of the swing mass block; g is the acceleration due to gravity; J is the total moment of inertia of the swing part about the center of the swing; k v is the speed ratio of swing to rotation; J s is the moment of inertia of the flywheel;
[0060] The principle analysis is as follows: From the above formula, it can be seen that when the pendulum length is within a reasonable range and the influence of gravity is not changed, when the flywheel's moment of inertia J s When the vibration frequency ω increases, the swing frequency ω will decrease. Therefore, the frequency modulation unit is used to rotate the first flywheel 5, the second flywheel 13, the third flywheel 21, the fourth flywheel 21, the fifth flywheel, and the sixth flywheel. This increases the rotational inertia of the flywheel without increasing the influence of gravity, and reduces the swing frequency of the swing arm 2 to cope with the lower main structure frequency. There is no need to increase the swing length of the swing arm 2 in the damper. Only when the swing frequency of the swing arm 2 is adapted to the main structure frequency can the best vibration damping effect be achieved.
[0061] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.
Claims
1. A swing damper, characterized in that: It comprises a support structure (1) installed on the inner wall of a tower, a swing arm unit is connected to the support structure (1), and a frequency modulation unit for adjusting the swing frequency is provided on the swing arm unit and the support structure (1).
2. The swing damper according to claim 1, characterized in that: The swing arm unit comprises a swing arm (2), a connecting bolt (27) arranged on the swing arm (2), and a plurality of mass blocks (10), wherein a first connecting hole is provided on each of the plurality of mass blocks (10), a second connecting hole is provided on the swing arm (2), the connecting bolt (27) passes through the first connecting hole and the second connecting hole in sequence, the outer edge of the connecting bolt (27) is threadedly connected with a connecting nut (28), and the connecting nut (28) is pressed against the swing arm (2) with its surface facing the swing arm (2).
3. The swing damper according to claim 2, characterized in that: The frequency modulation unit comprises a main connecting shaft (3) rotatably connected to a support structure (1); the swing arm (2) is fixedly sleeved on the outer edge of the main connecting shaft (3); a slave connecting shaft (4) is provided on the support structure (1); one end of the slave connecting shaft (4) facing away from the support structure (1) is connected to a plurality of first flywheels (5); the main connecting shaft (3) and the slave connecting shaft (4) are connected via a transmission assembly (6); when the swing arm (2) swings, the main connecting shaft (3) and the plurality of first flywheels (5) rotate synchronously.
4. The swing damper according to claim 3, characterized in that: The transmission assembly (6) comprises a main gear (7) arranged at one end of the main connecting shaft (3) away from the support structure (1); a slave gear (8) matching the main gear (7) is rotatably connected to the slave connecting shaft (4); the main gear (7) is meshed with the slave gear (8); the end of the slave gear (8) away from the support structure (1) is fixedly connected to a first flywheel shaft (9); and a plurality of the first flywheel plates (5) are arranged at one end of the first flywheel shaft (9) away from the support structure (1).
5. The swing damper according to claim 2, characterized in that: The frequency modulation unit comprises a first mounting shaft connected to a support structure (1) via a joint bearing, the swing arm (2) is fixedly arranged on the first mounting shaft, a first mounting frame (11) is provided on the swing arm (2), a first screw rod (12) is provided on the support structure (1), a first nut of the first screw rod (12) is rotatably connected to the first mounting frame (11), and a plurality of second flywheel pieces (13) are fixedly sleeved on the outer edge of the first nut of the first screw rod (12).
6. The swing damper according to claim 2, characterized in that: The frequency modulation unit comprises a second mounting shaft connected to the support structure (1) via a joint bearing, the swing arm (2) is fixedly arranged on the second mounting shaft, a second mounting frame is provided on the swing arm (2), a second screw rod is rotatably connected to the support structure (1), a second nut of the second screw rod is fixedly arranged on the second mounting frame, and a plurality of third flywheel pieces are solidly sleeved on the second screw rod.
7. The swing damper according to claim 2, characterized in that: The frequency modulation unit comprises a first transmission seat (14) rotatably connected to the swing arm (2), a first transmission rod (15) is hingedly connected to the end of the first transmission seat (14) away from the swing arm (2), a first support frame (16) is provided on the first transmission rod (15), a first support rod (17) is ball-hinged on the inner wall of the tower, and the first support frame (16) is slidably connected to the first support rod (17), a rack (18) is provided on the first support rod (17), a second flywheel shaft (19) is rotatably connected to the first support frame (16), the second flywheel shaft (19) is provided with a gear (20) matching the rack (18) at one end facing the first support rod (17), the gear (20) is meshed with the rack (18), and a plurality of fourth flywheel pieces (21) are provided on the end of the second flywheel shaft (19) away from the first support rod (17).
8. The swing damper according to claim 7, characterized in that: A roller bearing is rotatably connected to the first support frame (16), and a rolling groove matching the roller bearing is provided on the surface of the first support rod (17) facing the roller bearing, and the roller bearing is slidably connected in the rolling groove.
9. The swing damper according to claim 2, characterized in that: The frequency modulation unit comprises a second transmission seat rotatably connected to the swing arm (2), the second transmission seat is hingedly connected to a second transmission rod at one end away from the swing arm (2), a second support frame is provided on the second transmission rod, a second support rod (25) is ball-hinged on the inner wall of the tower, and the second support frame is slidably connected to the second support rod (25), a first rolling wheel (22), a second rolling wheel (23) and a third rolling wheel (24) are rotatably connected to the second support frame in sequence, a synchronous belt (26) is provided on the second support rod (25), both ends of the synchronous belt (26) are arranged on the second support rod (25), the synchronous belt (26) is tightened and wound around the first rolling wheel (22), the second rolling wheel (23) and the third rolling wheel (24) in sequence, a third flywheel shaft is rotatably connected to the second support frame, the second rolling wheel (23) is arranged at one end of the third flywheel shaft facing the second support rod (25), and a plurality of fifth flywheel pieces are provided at one end of the third flywheel shaft away from the second support rod (25).
10. The swing damper according to claim 2, characterized in that: The transmission gear of the present invention is a gear which is connected to the first gear and the gear is connected to the transmission gear of the present invention, and the gear is connected to the first gear and the gear is connected to the transmission gear of the present invention; and the transmission gear is connected to the gear of the transmission gear of the present invention in an orderly manner.