Arc-shaped track damper device for wind generating set tower

Abstract

The arc-shaped track damper device comprises an arc-shaped track and a mass block set, the two ends of the arc-shaped track are connected with the inner side of the tower, the diameter of the arc-shaped track is 8-28 m, and a rotating mechanism and a sliding mechanism are arranged between the arc-shaped track and the mass block set. The mass block group reciprocates back and forth on the arc-shaped track through the sliding mechanism, the connecting mechanisms are connected to the two sides of the arc-shaped track and used for supporting the mass block group, the moment resisting device and the frequency modulation device are connected to the same end or the two ends of the rotating mechanism, and by arranging the arc-shaped track damper device, the purposes of increasing resistance and restraining vibration are achieved. The tower damping device is simple in structure, small in size, light in weight and small in occupied space, and can guarantee operation safety and power generation benefits of the wind generating set.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration reduction of wind power generation tower barrels, and more specifically, relates to an arc track damper device for a wind turbine tower. Background Art

[0002] A damping device is a device that uses damping characteristics to slow down mechanical vibrations and consume kinetic energy, and is widely used in multiple fields. Taking the wind power technology field as an example, the tower of a wind turbine is a support structure of the wind turbine, and its structural safety and stability are related to the safety and performance of the entire wind turbine. As the capacity of wind turbines continues to increase, the tower height continues to increase, the tower frequency continues to decrease, and the tower vibration problem will become more and more prominent. In order to ensure the safe and stable operation of the tower and the entire machine, a damping device needs to be installed on the wind turbine.

[0003] However, in the prior art, there are problems that the damping device occupies a large space and is prone to interference with the structural components inside the tower barrel, and has a complex structure, a large volume, and a large mass, which affects the operation safety and power generation efficiency of the wind turbine. At the same time, it is not convenient for daily maintenance, testing, and overhaul, etc. Summary of the Invention

[0004] Therefore, in order to solve the above technical problems, the present invention proposes an arc track damper device for a wind turbine tower, including an arc track 10 and a mass block group 20. The two ends of the arc track 10 are connected to the inner side of the tower. The diameter of the arc track 10 is 8 - 28 m. A rotating mechanism 30 and a sliding mechanism are provided between the arc track 10 and the mass block group 20. Through the sliding mechanism, the mass block group 20 reciprocates back and forth on the arc track 10. Connecting mechanisms 40 are connected to both sides of the arc track 10 for supporting the mass block group 20. A torque resistance device 50 and a frequency modulation device 60 are connected to the same end or both ends of the rotating mechanism 30. When the tower vibrates under an external force, the movement of the mass block group 20 and the connecting mechanism 40 generates an inertial force for vibration reduction. The mass block group 20 moves back and forth on the arc track 10, driving the rotating mechanism 30 to rotate, and then driving the torque resistance device 50 and the frequency modulation device 60 to start. When the components in the torque resistance device 50 rotate relative to each other, a resistance torque is generated to control the movement amplitude and speed of the mass block group 20. The frequency modulation device 60 plays an auxiliary frequency modulation role and is applicable to different frequencies of wind turbines. By providing the arc track 10 damper device, the present invention achieves the purpose of increasing resistance and suppressing vibration, reduces the vibration of the tower, and thus improves the stability and safety of the tower. It not only has a simple structure, a small volume, and a small mass, but also occupies a small space, and can ensure the operation safety and power generation efficiency of the wind turbine.

[0005] An arc-shaped track damper device for a wind turbine tower, comprising an arc-shaped track 10 and a mass block group 20. Both ends of the arc-shaped track 10 are connected to the inner side of the tower. The diameter of the arc-shaped track 10 is 8 - 28 m. A rotating mechanism 30 and a sliding mechanism are provided between the arc-shaped track 10 and the mass block group 20. Through the sliding mechanism, the mass block group 20 reciprocates back and forth on the arc-shaped track 10. Connecting mechanisms 40 are connected to both sides of the arc-shaped track 10 for supporting the mass block group 20. A torque resistance device 50 and a frequency modulation device 60 are connected to the same end or both ends of the rotating mechanism 30.

[0006] Further, the mass block group 20 includes an upper mass block 201 and a lower mass block 202. The connecting mechanism 40 includes a support plate 401. The top end of the support plate 401 is connected to the upper mass block 201, and the bottom end of the support plate 401 is connected to the lower mass block 202. When relative movement occurs in the mass block group 20, the connecting mechanism 40 is driven to move together. By increasing the number of the upper mass block 201 and / or the lower mass block 202, the generated inertial force is increased to achieve a better vibration damping effect on the tower.

[0007] Further, the connecting mechanism 40 further includes a connecting bracket 402. Both ends of the connecting bracket 402 are connected to the corresponding support plate 401. The connecting bracket 402 is used to fix the support plate 401, making the connection of the support plate 401 highly stable. The arc-shaped track 10 is placed inside the support plate 401. One side of one support plate 401 away from the arc-shaped track 10 is connected to the torque resistance device 50, and one side of the other support plate 401 away from the arc-shaped track 10 is connected to the frequency modulation device 60. One end of the rotating mechanism 30 passes through the support plate 401 and is connected to the driving end of the torque resistance device 50, and the other end of the rotating mechanism 30 passes through the support plate 401 and is connected to the driving end of the frequency modulation device 60.

[0008] Further, the rotating mechanism 30 includes a gear shaft 301, a rack 302, and a gear ring. The rack 302 or the gear ring is connected to the inner and outer circles of the arc-shaped track 10. The gear shaft 301 meshes with the rack 302, and the gear shaft 301 meshes with the gear ring. The gear shaft 301 is connected to the mass block group 20 through the connecting mechanism 40. One end of the gear shaft 301 is connected to the torque resistance device 50, and the other end is connected to the frequency modulation device 60. When relative movement occurs in the mass block group 20, the gear shaft 301 is driven to rotate.

[0009] Further, the rotating mechanism 30 further includes a toothed belt 303 and a pulley shaft 304. The toothed belt 303 meshes with the pulley shaft 304. The bottom end of the arc-shaped track 10 is connected to the toothed belt 303. The pulley shaft 304 is connected to the mass block group 20 through the connecting mechanism 40. One end of the pulley shaft 304 is connected to the torque resistance device 50, and the other end is connected to the frequency modulation device 60. When relative movement occurs in the mass block group 20, the pulley shaft 304 is driven to rotate.

[0010] Further, idler wheels 70 are provided on both sides of the pulley shaft 304. Both ends of the idler wheels 70 are connected to the connecting mechanism 40. The idler wheels 70 are used to adjust the contact area between the toothed belt 303 and the pulley shaft 304, thereby increasing the friction force and preventing the toothed belt 303 from slipping.

[0011] Further, the torque resistance device 50 includes a magnetic member and a conductor member. The moving part of the torque resistance device 50 is the magnetic member or the conductor member. When the moving part moves, the magnetic member and the conductor member rotate relative to each other to cut the magnetic induction line to generate a resistance torque. The conductor member is a whole piece of conductive material or a wire processed from conductive material. The torque resistance device 50 further includes a first speed increasing mechanism. One end of the first speed increasing mechanism is connected to the torque resistance device 50, and the other end is connected to the rotating mechanism 30, and is used to increase the rotation speed of the torque resistance device 50 and increase the resistance torque when the rotation speed of the torque resistance device 50 is too slow.

[0012] Further, the torque resistance device 50 is electromagnetic damping, friction damping, or fluid damping.

[0013] Further, the electromagnetic damping is generated by the conductor cutting the magnetic field, the fluid damping is generated by the resistance generated by the spoiler running in the liquid, and the friction damping is generated by the Coulomb friction between two solid surfaces, all of which generate a torque that hinders rotation and form a damping effect.

[0014] Further, the frequency modulation device 60 is a flywheel for assisting in frequency modulation. The frequency modulation device 60 further includes a second speed increasing mechanism 150. One end of the second speed increasing mechanism 150 is connected to the frequency modulation device 60, and the other end is connected to the rotating mechanism 30, and is used to increase the angular acceleration of the frequency modulation device 60 and increase the inertia torque when the rotation speed of the frequency modulation device 60 is too slow.

[0015] Further, the sliding mechanism includes a groove 80 and a roller group 90. The groove 80 with an outward opening is provided on both sides of the arc-shaped track 10. The connecting mechanism 40 is connected with the roller group 90 that matches the groove 80. The roller group 90 has at least two rollers, which are arranged symmetrically in parallel at intervals. The roller group 90 is slidably connected to the groove 80, so that the mass block group 20 reciprocates back and forth on the arc-shaped track 10.

[0016] Further, the roller set 90 includes a first roller 901 and a second roller 902. Both the first roller 901 and the second roller 902 are connected to the support plate 401. The top end of the first roller 901 abuts against the upper end of the groove 80, the bottom end of the first roller 901 abuts against the lower end of the groove 80, and the top end of the second roller 902 abuts against the bottom end of the groove 80.

[0017] Further, the sliding mechanism further includes a third roller 100. The third roller 100 is connected to the connecting mechanism 40 and is in rolling connection with the top surface of the arc track 10, so that the mass block set 20 reciprocates back and forth on the arc track 10.

[0018] Further, fixing blocks 110 are provided at both ends of the connecting mechanism 40. After the fixing blocks 110 are connected to the connecting mechanism 40, the fixing blocks 110 are then connected to the arc track 10. Under normal conditions, the fixing blocks 110 are used to fix the movement of the connecting mechanism 40 and the rotating mechanism 30.

[0019] Further, a heat dissipation device 120 is provided on one side of the connecting mechanism 40. The heat dissipation device 120 includes a mounting frame 1201 and heat dissipation fins 1202. The mounting frame 1201 is connected to the connecting mechanism 40, and both ends of the heat dissipation fins 1202 are mounted on the mounting frame 1201. There are multiple heat dissipation fins 1202, which are arranged at equal intervals. The heat dissipation device 120 is used to dissipate the heat generated during the operation of the torque resistance device 50 to prevent the temperature from being too high, affecting the performance, and damaging the equipment.

[0020] Further, a limiting device 130 is connected to the upper parts of both ends of the arc track 10. The limiting device 130 includes a support seat 1301, an elastic body 1302, and a fixing plate 1303. The support seat 1301 is connected to the upper parts of both ends of the arc track 10. The top end of the support seat 1301 is connected to the bottom end of the elastic body 1302, and the top end of the elastic body 1302 is connected to the fixing plate 1303. The limiting device 130 is used to limit the stroke of the mass block set 20 to prevent it from colliding with the tower.

[0021] Further, there are multiple elastic bodies 1302, which are arranged in parallel and symmetrically at equal intervals. The material of the elastic body 1302 is an elastic material, and the elastic material is rubber or silica gel.

[0022] Further, the limiting device 130 can also be a buffer, which is used to slow down and absorb the impact force of the collision of the mass block set 20.

[0023] Furthermore, fixed structures 140 are connected and provided at the lower parts of both ends of the arc-shaped track 10. The fixed structures 140 include fixed seats 1401 and connecting members 1402. One end of the fixed seat 1401 is connected to the tower wall, the other end of the fixed seat 1401 is fixedly connected to one end of the connecting member 1402, and the other end of the connecting member 1402 is connected to both sides of the lower part of the end of the arc-shaped track 10.

[0024] Working principle of the damping motor in electromagnetic damping: When a wire (winding) or a permanent magnet rotates, the wire will cut the magnetic induction lines, and an induced electromotive force will be formed in the wire. When a suitable load is added to the wire loop and closed, an induced current will be generated in the wire. This induced current will be affected by the Ampere force in the magnetic field and generate a torque that hinders rotation.

[0025] Working principle of eddy current in electromagnetic damping: When a whole conductor (such as a copper plate, an aluminum plate or other conductor metals, non-metals) or a permanent magnet rotates, the conductor will cut the magnetic induction lines, and eddy currents, that is, eddy current, will be induced inside the conductor. The eddy current will generate a magnetic field opposite to the direction of the original magnetic field, and the two will interact to generate resistance and produce a torque that hinders rotation.

[0026] Working principle of fluid damping: Fluid damping consists of a stator and a rotor. The stator is used to be fixed to an external fixed part, the rotor is connected to an external rotating part, spoiler plates are installed on the outside of the rotor, and a fluid damping medium (such as silicone oil, hydraulic oil, etc.) is filled in the space between the rotor and the stator. When the spoiler plates move in the fluid, the inertial force and viscous force of the liquid hinder the spoiler plates and generate resistance to rotation, producing a torque that hinders rotation.

[0027] Working principle of friction damping: Friction damping consists of a stator and a rotor. The stator is used to be fixed to an external fixed part, the rotor is connected to an external rotating part, and both the rotor and the stator are provided with friction surfaces, which are in contact with each other, and a certain pressure is given through a pressure mechanism (bolts, gravity, etc.). The friction surface material is a high-wear-resistant and high-friction material. When the friction surface of the rotor moves, the friction surface of the stator will generate Coulomb friction resistance, producing a torque that hinders rotation.

[0028] Advantages of the present invention: The present invention provides an arc-shaped track damper device for a wind turbine tower, which includes an arc-shaped track 10 and a mass block group 20. The two ends of the arc-shaped track 10 are connected to the inner side of the tower. The diameter of the arc-shaped track 10 is 8 - 28 m. A rotating mechanism 30 and a sliding mechanism are provided between the arc-shaped track 10 and the mass block group 20. Through the sliding mechanism, the mass block group 20 reciprocates back and forth on the arc-shaped track 10. Connecting mechanisms 40 are connected to both sides of the arc-shaped track 10 for supporting the mass block group 20. A torque resistance device 50 and a frequency modulation device 60 are connected to the same end or both ends of the rotating mechanism 30. When the tower vibrates under external force, the movement of the mass block group 20 and the connecting mechanism 40 generates inertial force for vibration reduction. The mass block group 20 moves back and forth on the arc-shaped track 10, driving the rotation of the rotating mechanism 30, and then driving the start of the torque resistance device 50 and the frequency modulation device 60. When the components in the torque resistance device 50 rotate relative to each other, a resistance torque is generated to control the movement amplitude and speed of the mass block group 20. The frequency modulation device 60 plays an auxiliary frequency modulation role and is applicable to different frequencies of wind turbines. By providing the arc-shaped track damper device, the present invention achieves the purpose of increasing resistance and suppressing vibration, reduces the vibration of the tower, and thus improves the stability and safety of the tower. It not only has a simple structure, small volume, and small mass, but also occupies little space, and can ensure the operation safety and power generation efficiency of wind turbines. Description of the Drawings

[0029] Figure 1 FIG. is a schematic diagram of the overall structure of an arc-shaped track damper device for a wind turbine tower according to the present invention.

[0030] Figure 2 FIG. is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention.

[0031] Figure 3 FIG. is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention.

[0032] Figure 4 FIG. is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention.

[0033] Figure 5 FIG. is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention.

[0034] Figure 6 FIG. is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention.

[0035] Main Element Symbol Description:

[0036] Arc-shaped track 10, mass block group 20, upper mass block 201, lower mass block 202, rotating mechanism 30, gear shaft 301, rack 302, connecting mechanism 40, support plate 401, connecting bracket 402, torque resistance device 50, frequency modulation device 60, toothed belt 303, pulley shaft 304, idler wheel 70, groove 80, roller group 90, first roller 901, second roller 902, third roller 100, fixing block 110, heat dissipation device 120, mounting frame 1201, heat sink 1202, limiting device 130, support seat 1301, elastic body 1302, fixing plate 1303, fixing structure 140, fixing seat 1401, connecting piece 1402, second speed increasing mechanism 150. Specific embodiments

[0037] The following embodiments are described to assist in understanding the present application. The embodiments are not and should not in any way be construed as limiting the scope of protection of the present application.

[0038] In the following description, those skilled in the art will recognize that throughout this discussion, various components or portions thereof may be divided into separate components or may be integrated together (including being integrated within a single system or component).

[0039] At the same time, the connections between components or systems are not intended to be limited to direct connections. Instead, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled", "connected", or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections.

[0040] Embodiment 1

[0041] As Figure 1 shown, it is a schematic diagram of the overall structure of an arc-shaped track damper device for a wind turbine tower according to the present invention; as Figure 2 shown, it is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention; as Figure 3 shown, it is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention; as Figure 4 shown, it is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention; as Figure 5 shown, it is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention; as Figure 6 shown, it is a schematic diagram of a partial structure of an arc-shaped track damper device for a wind turbine tower according to the present invention.

[0042] An arc-shaped track damper device for a wind turbine tower, comprising an arc-shaped track 10 and a mass block group 20. The two ends of the arc-shaped track 10 are connected to the inner side of the tower. The diameter of the arc-shaped track 10 is 8 - 28 m. A rotating mechanism 30 and a sliding mechanism are provided between the arc-shaped track 10 and the mass block group 20. Through the sliding mechanism, the mass block group 20 reciprocates back and forth on the arc-shaped track 10. Connecting mechanisms 40 are connected to both sides of the arc-shaped track 10 for supporting the mass block group 20. A torque resistance device 50 and a frequency modulation device 60 are connected to the same end or both ends of the rotating mechanism 30. When the tower vibrates under external force, the movement of the mass block group 20 and the connecting mechanisms 40 generates inertial forces for vibration reduction. The mass block group 20 moves back and forth on the arc-shaped track 10, driving the rotation of the rotating mechanism 30, and then driving the start of the torque resistance device 50 and the frequency modulation device 60. When the components in the torque resistance device 50 rotate relative to each other, a resistance torque is generated to control the movement amplitude and speed of the mass block group 20. The frequency modulation device 60 plays an auxiliary frequency modulation role and is applicable to different frequencies of wind turbines.

[0043] The mass block group 20 includes an upper mass block 201 and a lower mass block 202. The connecting mechanism 40 includes a support plate 401. The top end of the support plate 401 is connected to the upper mass block 201, and the bottom end of the support plate 401 is connected to the lower mass block 202. When relative movement occurs in the mass block group 20, it drives the connecting mechanism 40 to move together. By increasing the number of the upper mass block 201 and / or the lower mass block 202, the generated inertial force is increased to achieve a better vibration reduction effect on the tower.

[0044] The connecting mechanism 40 further includes a connecting bracket 402. Both ends of the connecting bracket 402 are connected to the corresponding support plate 401. The connecting bracket 402 is used to fix the support plate 401, making the connection of the support plate 401 highly stable. The arc-shaped track 10 is placed inside the support plate 401. One side of one support plate 401 away from the arc-shaped track 10 is connected to the torque resistance device 50, and the other side of the other support plate 401 away from the arc-shaped track 10 is connected to the frequency modulation device 60. One end of the rotating mechanism 30 passes through the support plate 401 and is connected to the driving end of the torque resistance device 50, and the other end of the rotating mechanism 30 passes through the support plate 401 and is connected to the driving end of the frequency modulation device 60.

[0045] The rotation mechanism 30 includes a gear shaft 301, a rack 302, and a gear ring. The inner and outer circles of the arc-shaped track 10 are connected with the rack 302 or the gear ring. The gear shaft 301 meshes with the rack 302, and the gear shaft 301 meshes with the gear ring. The gear shaft 301 is connected to the mass block group 20 through the connection mechanism 40. One end of the gear shaft 301 is connected to the torque resistance device 50, and the other end is connected to the frequency modulation device 60. When relative movement occurs in the mass block group 20, the gear shaft 301 is driven to rotate.

[0046] The torque resistance device 50 includes a magnetic member and a conductor member. The moving part of the torque resistance device 50 is the magnetic member or the conductor member. When the moving part moves, the magnetic member and the conductor member rotate relative to each other to cut the magnetic induction line to generate a resistance torque. The conductor member is a whole piece of conductive material or a wire formed by processing conductive material. The torque resistance device 50 further includes a first speed increasing mechanism. One end of the first speed increasing mechanism is connected to the torque resistance device 50, and the other end is connected to the rotation mechanism 30, and is used to increase its rotation speed and increase the resistance torque when the torque resistance device 50 rotates too slowly.

[0047] The torque resistance device 50 is an electromagnetic damper.

[0048] The electromagnetic damper conductor cuts the magnetic field. When the rotation mechanism 30 drives the torque resistance device 50 to start, the torque resistance device 50 generates an induced current. The induced current will be affected by the Ampere force in the magnetic field, generating a torque that hinders rotation, forming a damping effect, and further restricting the stroke of the rotation mechanism 30 and the mass block group 20.

[0049] The frequency modulation device 60 is a flywheel for assisting in frequency modulation. The frequency modulation device 60 further includes a second speed increasing mechanism 150. One end of the second speed increasing mechanism 150 is connected to the frequency modulation device 60, and the other end is connected to the rotation mechanism 30, and is used to increase its angular acceleration and increase the inertia torque when the frequency modulation device 60 rotates too slowly.

[0050] The sliding mechanism includes a groove 80 and a roller group 90. The groove 80 with an outward opening is provided on both sides of the arc-shaped track 10. The roller group 90 matching the groove 80 is connected to the connection mechanism 40. The roller group 90 has at least two, and is arranged symmetrically at intervals in parallel. The roller group 90 is slidably connected to the groove 80, so that the mass block group 20 reciprocates back and forth on the arc-shaped track 10.

[0051] The roller group 90 includes a first roller 901 and a second roller 902. Both the first roller 901 and the second roller 902 are connected to the support plate 401. The top end of the first roller 901 abuts against the upper end of the groove 80, the bottom end of the first roller 901 abuts against the lower end of the groove 80, and the top end of the second roller 902 abuts against the bottom end of the groove 80.

[0052] Both ends of the connecting mechanism 40 are provided with fixing blocks 110. After the fixing blocks 110 are connected to the connecting mechanism 40, the fixing blocks 110 are further connected to the arc track 10. Under normal conditions, the fixing blocks 110 are used to fix the movement of the connecting mechanism 40 and the rotating mechanism 30.

[0053] A heat dissipation device 120 is provided on one side of the connecting mechanism 40. The heat dissipation device 120 includes a mounting frame 1201 and heat dissipation fins 1202. The mounting frame 1201 is connected to the connecting mechanism 40, and both ends of the heat dissipation fins 1202 are mounted on the mounting frame 1201. There are multiple heat dissipation fins 1202, which are arranged at equal intervals. The heat dissipation device 120 is used to dissipate the heat generated during the operation of the torque resistance device 50 to prevent the temperature from being too high, affecting the performance, and damaging the equipment.

[0054] Limit devices 130 are connected to the upper parts of both ends of the arc track 10. The limit devices 130 include support seats 1301, elastic bodies 1302, and fixing plates 1303. The support seats 1301 are connected to the upper parts of both ends of the arc track 10. The top end of the support seat 1301 is connected to the bottom end of the elastic body 1302, and the top end of the elastic body 1302 is connected to the fixing plate 1303. The limit devices 130 are used to limit the stroke of the mass block group 20 to prevent it from colliding with the tower.

[0055] There are multiple elastic bodies 1302, which are arranged in parallel and symmetrically at equal intervals. The material of the elastic bodies 1302 is an elastic material, and the elastic material is rubber or silica gel.

[0056] Fixing structures 140 are connected to the lower parts of both ends of the arc track 10. The fixing structures 140 include fixing seats 1401 and connecting members 1402. One end of the fixing seat 1401 is connected to the tower wall, the other end of the fixing seat 1401 is fixedly connected to one end of the connecting member 1402, and the other end of the connecting member 1402 is connected to the lower sides of both ends of the arc track 10.

[0057] Embodiment 2

[0058] As Figure 5As shown in the figure, it is a partial structural schematic diagram of an arc track damper device for a wind turbine tower according to the present invention.

[0059] The difference between Embodiment 1 and Embodiment 2 is that: the rotating mechanism 30 further includes a toothed belt 303 and a pulley shaft 304, the toothed belt 303 meshes with the pulley shaft 304, the bottom end of the arc track 10 is connected to the toothed belt 303, the pulley shaft 304 is connected to the mass block group 20 through the connecting mechanism 40, one end of the pulley shaft 304 is connected to the torque resistance device 50, and the other end is connected to the frequency modulation device 60. When relative movement occurs in the mass block group 20, it drives the pulley shaft 304 to rotate.

[0060] Idler wheels 70 are provided on both sides of the pulley shaft 304, and both ends of the idler wheels 70 are connected to the connecting mechanism 40. The idler wheels 70 are used to adjust the contact area between the toothed belt 303 and the pulley shaft 304, thereby increasing the friction force and preventing the toothed belt 303 from slipping.

[0061] The torque resistance device 50 is a friction damping, and the friction damping generates a torque that hinders rotation through the Coulomb friction between two solid surfaces.

[0062] The sliding mechanism further includes a third roller 100. The third roller 100 is connected to the connecting mechanism 40, and the third roller 100 is in rolling connection with the top surface of the arc track 10, so that the mass block group 20 reciprocates back and forth on the arc track 10.

[0063] The limiting device 130 can also be a buffer, which is used to slow down and absorb the impact force of the collision of the mass block group 20.

[0064] Embodiment 3

[0065] The difference in Embodiment 3 is that: the torque resistance device 50 is a fluid damping, and the fluid damping generates a torque that hinders rotation through the resistance generated by the spoiler running in the liquid.

[0066] The sliding mechanism can also be a connection method of a slider and a slide rail. A slide rail is connected to the arc track 10, and a slider is provided on the connecting mechanism 40. The slide rail is in sliding connection with the slider.

[0067] Advantages of the present invention: The present invention provides an arc-shaped track damper device for a wind turbine tower, which includes an arc-shaped track 10 and a mass block group 20. The two ends of the arc-shaped track 10 are connected to the inner side of the tower. The diameter of the arc-shaped track 10 is 8-28 m. A rotating mechanism 30 and a sliding mechanism are provided between the arc-shaped track 10 and the mass block group 20. Through the sliding mechanism, the mass block group 20 reciprocates back and forth on the arc-shaped track 10. Connecting mechanisms 40 are connected to both sides of the arc-shaped track 10 for supporting the mass block group 20. A torque resistance device 50 and a frequency modulation device 60 are connected to the same end or both ends of the rotating mechanism 30. When the tower vibrates under external force, the movement of the mass block group 20 and the connecting mechanisms 40 generates inertial forces for vibration reduction. The mass block group 20 moves back and forth on the arc-shaped track 10, driving the rotation of the rotating mechanism 30, and then driving the start of the torque resistance device 50 and the frequency modulation device 60. When the components in the torque resistance device 50 rotate relative to each other, a resistance torque is generated to control the movement amplitude and speed of the mass block group 20. The frequency modulation device 60 plays an auxiliary role in frequency modulation and is applicable to different frequencies of wind turbines. By providing the arc-shaped track damper device, the present invention achieves the purpose of increasing resistance and suppressing vibration, reduces the vibration of the tower, and further improves the stability and safety of the tower. It not only has a simple structure, small volume, and small mass, but also occupies little space, and can ensure the operation safety and power generation efficiency of wind turbines.

[0068] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An arc-shaped track damper device for a wind turbine tower, characterized in that: It includes an arc-shaped track (10) and a mass block group (20). Both ends of the arc-shaped track (10) are connected to the inner side of the tower. The diameter of the arc-shaped track (10) is 8 - 28 m. A rotating mechanism (30) and a sliding mechanism are provided between the arc-shaped track (10) and the mass block group (20). Through the sliding mechanism, the mass block group (20) reciprocates back and forth on the arc-shaped track (10). Connecting mechanisms (40) are connected to both sides of the arc-shaped track (10) for supporting the mass block group (20). A torque resistance device (50) and a frequency modulation device (60) are connected to the same end or both ends of the rotating mechanism (30).

2. The arc-shaped track damper device for a wind turbine tower according to claim 1, characterized in that: The mass block group (20) includes an upper mass block (201) and a lower mass block (202). The connecting mechanism (40) includes a support plate (401). The top end of the support plate (401) is connected to the upper mass block (201), and the bottom end of the support plate (401) is connected to the lower mass block (202). When relative movement occurs in the mass block group (20), it drives the connecting mechanism (40) to move together. By increasing the number of the upper mass block (201) and / or the lower mass block (202), the generated inertial force is increased to reduce the vibration of the tower.

3. The arc-shaped track damper device for a wind turbine tower according to claim 1, characterized in that: The rotating mechanism (30) includes a gear shaft (301), a rack (302), and a gear ring. The rack (302) or the gear ring is connected to the inner and outer circles of the arc-shaped track (10). The gear shaft (301) meshes with the rack (302), and the gear shaft (301) meshes with the gear ring. The gear shaft (301) is connected to the mass block group (20) through the connecting mechanism (40). One end of the gear shaft (301) is connected to the torque resistance device (50), and the other end is connected to the frequency modulation device (60). When relative movement occurs in the mass block group (20), it drives the gear shaft (301) to rotate.

4. The arc-shaped track damper device for a wind turbine tower according to claim 1, characterized in that: The rotating mechanism (30) further includes a toothed belt (303) and a pulley shaft (304). The toothed belt (303) meshes with the pulley shaft (304). The bottom end of the arc-shaped track (10) is connected to the toothed belt (303). The pulley shaft (304) is connected to the mass block group (20) through the connecting mechanism (40). One end of the pulley shaft (304) is connected to the torque resistance device (50), and the other end is connected to the frequency modulation device (60). When relative movement occurs in the mass block group (20), it drives the pulley shaft (304) to rotate.

5. The arc-shaped track damper device for a wind turbine tower according to claim 4, characterized in that: The torque resistance device (50) is electromagnetic damping, friction damping, or fluid damping. For electromagnetic damping, a conductor cuts the magnetic field; for fluid damping, resistance is generated by a spoiler running in a liquid; for friction damping, it is the Coulomb friction between two solid surfaces. The torque resistance device (50) further includes a first speed increasing mechanism. One end of the first speed increasing mechanism is connected to the torque resistance device (50), and the other end is connected to the rotating mechanism (30), which is used to increase the rotation speed of the torque resistance device (50) when its rotation speed is too slow, thereby increasing the resistance torque.

6. The arc-shaped track damper device for a wind turbine tower according to claim 5, characterized in that: The frequency modulation device (60) is a flywheel for assisting in frequency modulation. The frequency modulation device (60) further includes a second speed increasing mechanism (150). One end of the second speed increasing mechanism (150) is connected to the frequency modulation device (60), and the other end is connected to the rotating mechanism (30), which is used to increase the angular acceleration of the frequency modulation device (60) when its rotation speed is too slow, thereby increasing the inertia torque.

7. The arc-shaped track damper device for a wind turbine tower according to claim 1, characterized in that: On one side of the connection mechanism (40), there is a heat dissipation device (120). The heat dissipation device (120) includes a mounting bracket (1201) and heat dissipation fins (1202). The mounting bracket (1201) is connected to the connection mechanism (40), and both ends of the heat dissipation fins (1202) are mounted on the mounting bracket (1201). There are multiple heat dissipation fins (1202) arranged at equal intervals. The heat dissipation device (120) is used to dissipate the heat generated during the operation of the torque resistance device (50), preventing the temperature from being too high, affecting the performance, and damaging the equipment.

8. The arc track damper device for a wind turbine tower according to claim 7, characterized in that: At the upper parts of both ends of the arc-shaped track (10), there is a limit device (130). The limit device (130) includes a support base (1301), an elastic body (1302), and a fixing plate (1303). The support base (1301) is connected to the upper parts of both ends of the arc-shaped track (10). The top end of the support base (1301) is connected to the bottom end of the elastic body (1302), and the top end of the elastic body (1302) is connected to the fixing plate (1303). The limit device (130) is used to limit the travel of the mass block group (20) to prevent it from colliding with the tower.

9. The arc track damper device for a wind turbine tower according to claim 8, characterized in that: At the lower parts of both ends of the arc-shaped track (10), there is a fixing structure (140). The fixing structure (140) includes a fixing base (1401) and a connecting member (1402). One end of the fixing base (1401) is connected to the tower wall, the other end of the fixing base (1401) is fixedly connected to one end of the connecting member (1402), and the other end of the connecting member (1402) is connected to the lower sides of both ends of the arc-shaped track (10).

10. The arc-shaped track damper device for a wind turbine tower according to claim 9, characterized in that: The sliding mechanism includes a groove (80) and a roller set (90). The groove (80) with an outward opening is provided on both sides of the arc-shaped track (10). The roller set (90) matching the groove (80) is connected to the connection mechanism (40). There are at least two roller sets (90), which are arranged symmetrically in parallel at intervals. The roller set (90) is slidably connected to the groove (80), so that the mass block set (20) reciprocates back and forth on the arc-shaped track (10).

Images