A multi-directional and multi-stage semi-active piezoelectric energy capture anti-vibration device

Abstract

The present invention relates to a multi-directional and multi-stage semi-active piezoelectric energy-capturing anti-dancing vibration reduction device, comprising an outer cylinder, blades are welded at both ends of the upper part of the outer cylinder, the outer cylinder is connected to the bearing through spokes, the bearing and the connecting shaft are interference fit, a spherical hinge is connected under the connecting shaft, and the outer part of the spherical hinge is rigidly connected to the inner cylinder. The spherical hinge in the inner cylinder is connected to a vibration-damping cylinder with a hanging ring on the top through a connecting rod, the vibration-damping cylinder is filled with magnetorheological fluid, a spring is wound on the upper end of the outer part of the vibration-damping cylinder, the lower end of the spring is connected to the piston inside the inner cylinder, and the piston inside the inner cylinder is also connected to the hanging ring at the bottom of the vibration-damping cylinder through a connecting rod. An excitation coil is wound on the outside of the inner cylinder, and a hanging rod is hinged on the upper end of the outer part of the inner cylinder. The hanging rod is connected to a hanging hammer, and the hanging hammer includes a hammer wing and a hammer belly. When there is no relative torsion between the upper and lower clamping devices, and no excitation of horizontal vibration occurs, the hammer wing rests on the vibration-damping rubber pad, and the energy-dissipating vibration reduction effect of the present invention is good.

Description

Technical Field

[0001] The present invention belongs to the field of vibration reduction control of transmission line intervals in overhead transmission line projects, and specifically relates to a multi-directional and multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device, which is mainly used to control the dancing of split conductors in transmission lines under wind loads. Background Art

[0002] At present, the conductors in power transmission lines are mostly split. Overhead power transmission lines are affected by meteorological conditions such as wind, ice, and low temperature all year round, as well as voltage and current. In addition to causing horizontal loads perpendicular to the line direction on overhead lines and towers, they also cause vibrations in overhead power transmission lines, which is called the transmission line galloping phenomenon. The harm caused by galloping is multifaceted. In mild cases, flashover and tripping may occur. In severe cases, hardware and insulator damage may occur, conductor strands and wires may be broken, tower bolts may become loose or fall off, and even towers may collapse, leading to major power grid safety accidents.

[0003] At present, transmission lines are generally multi-split, and generally need to be equipped with spacers to prevent the vibration of transmission lines. However, as the transmission line shows a trend of increasing conductor cross-section and increasing number of splits, the situation of anti-dancing of transmission lines has become more severe, and higher requirements have been put forward for the anti-dancing work of transmission lines. Currently, the existing anti-dancing spacers are mostly passive anti-dancing, which cannot be spontaneously regulated, and most of them are unidirectional anti-dancing, while the actual dancing moves in three-dimensional space. Therefore, the current anti-dancing device has limited restraint ability on the transmission line and cannot meet the current power industry's ultra-high voltage, long-distance, and large-span transmission requirements. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a multi-directional, multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device to solve the problem of insufficient vibration constraints on conductors by passive anti-dancing of existing power transmission lines under multi-directional excitation of the environment.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention proposes a multi-directional and multi-stage semi-active piezoelectric energy-capturing anti-dancing vibration reduction device, comprising an outer cylinder, blades are welded at both ends of the upper part of the outer cylinder, the outer cylinder is connected to the bearing through spokes, the bearing and the connecting shaft adopt interference fit, a spherical hinge is arranged under the connecting shaft, the outer part of the spherical hinge is rigidly connected to the inner cylinder; the spherical hinge inside the inner cylinder is connected to the vibration reduction cylinder with a hanging ring on the top through a connecting rod, the vibration reduction cylinder is filled with magnetorheological fluid, a spring is wound on the outer upper end of the vibration reduction cylinder, the lower end of the spring is connected to the first piston inside the inner cylinder, and the inner cylinder The first piston inside is also connected to the lifting ring at the bottom of the shock-absorbing cylinder through a connecting rod; an excitation coil is wound around the outer wall of the inner cylinder, and multiple suspension rods are hinged on the upper end of the outer inner cylinder, each suspension rod is connected to a hammer, and all the hammers rest on the shock-absorbing rubber pad. The inner side of the shock-absorbing rubber pad is fitted with the piezoelectric power generation unit, so that when the hammer swings, the pressure of the hammer wing is transmitted to the piezoelectric power generation unit through the shock-absorbing rubber pad; the piezoelectric power generation unit is fitted with a pressure sensor, and forms a closed loop with the power extraction and storage unit, the resistor and the excitation coil.

[0007] As a further technical solution, an arc track is arranged between each hanging hammer and the inner cylinder body, an arc gear track bar is placed on the arc track, and a gear meshing with the arc track gear bar is arranged above the arc gear track bar. The arc track is connected to a damping liquid tank through a connecting steel pipe, and the damping liquid tank is filled with damping liquid and a rotating wheel, and the gear shaft passes through the gear and the rotating wheel; one end of the arc gear track bar is connected to the hanging hammer, and the other end is connected to the fourth piston, and the built-in pistons in the arc track on both sides of the inner cylinder body are connected through air springs.

[0008] As a further technical solution, the shock-absorbing cylinder includes an inner cavity core cylinder and an outer cavity liquid storage cylinder. The inner cavity core cylinder is provided with a second piston and a third piston in sequence from top to bottom. The second piston and the third piston divide the inner cavity core cylinder into an upper chamber, a middle chamber and a lower chamber from top to bottom. The three chambers are all filled with magnetorheological fluid, and the lower chamber is connected to the outer cavity liquid storage cylinder through a reserved channel. The second piston is provided with an extension valve and a flow valve, which can slide linearly up and down in the inner chamber of the shock-absorbing cylinder. The third piston is fixed on the wall of the inner chamber of the shock-absorbing cylinder and is provided with a compression valve and a compensation valve.

[0009] As a further technical solution, the second piston is connected to the lifting ring via a piston rod.

[0010] As a further technical solution, the expansion valve, circulation valve, compression valve and compensation valve are all one-way valves. The expansion valve only allows the liquid in the upper chamber to flow into the middle chamber, and the circulation valve only allows the liquid in the middle chamber to flow into the upper chamber; the compression valve only allows the liquid in the upper chamber to flow into the middle chamber; and the compensation valve only allows the liquid in the middle chamber to flow into the upper chamber.

[0011] As a further technical solution, the volume of the piston rod built into the shock-absorbing cylinder is smaller than the volume of the liquid storage cylinder in the outer cavity of the shock-absorbing cylinder.

[0012] As a further technical solution, a limited short rod is provided on the second piston.

[0013] As a further technical solution, a damping net is arranged inside the extension valve, the flow valve, the compression valve, the compensation valve and the liquid storage cylinder inside the shock absorbing cylinder.

[0014] As a further technical solution, a first clamping device is connected to the top of the outer cylinder through a connecting rod, and a piston rod of the first piston passes through the inner cylinder and is connected to the second clamping device.

[0015] As a further technical solution, the outer cylinder and the inner cylinder of the anti-dancing device are made of fiber-reinforced composite materials.

[0016] Specifically, the working principle of the present invention is as follows:

[0017] The anti-dancing device is installed between overhead power transmission lines. When stimulated by vertical vibration, the clamping device drives the piston rod through the suspension rod to push the piston to make linear up and down motion in the inner cylinder. The spring is squeezed and expands inside the inner cylinder, thereby reducing part of the vibration. The piston rod is connected to the damping cylinder. When the damping cylinder is compressed, the piston rod in the damping cylinder moves downward relative to the upper cavity of the damping cylinder, the volume of the middle cavity of the damping cylinder decreases, and the volume of the upper cavity increases. The magnetorheological hydraulic opening and closing valve in the middle cavity squeezes into the upper cavity. Since the piston rod in the damping cylinder occupies part of the volume of the upper cavity, the increased volume of the upper cavity is less than the reduced volume of the middle cavity. This results in that the magnetorheological fluid in the middle cavity cannot flow to the upper cavity. The excess liquid enters the lower cavity from the compression valve and then flows into the liquid storage cylinder through the channel. Due to the existence of the damping net, when the magnetorheological fluid flows through the circulation valve and the compression valve, a damping force is generated, thereby dissipating energy; when the shock-absorbing cylinder is stretched, the piston in the shock-absorbing cylinder moves upward relative to the middle cavity of the shock-absorbing cylinder, the volume of the upper cavity of the shock-absorbing cylinder decreases, and the volume of the middle cavity increases. The magnetorheological fluid pushes open the extension valve and enters the middle cavity. Due to the existence of the piston rod in the shock-absorbing cylinder, a certain vacuum degree is generated in the middle cavity, causing the magnetorheological fluid to flow from the liquid storage cylinder into the lower cavity and then open the compensation valve to inhale the middle cavity. Due to the existence of the damping net, when the magnetorheological fluid flows through the extension valve and the compensation valve, a damping force is generated, thereby dissipating energy.

[0018] When the transmission wire dances in the horizontal direction, or the upper and lower transmission wires move relative to each other in the horizontal direction, the upper and lower clamping devices are stimulated by the horizontal vibration of the upper and lower transmission wires and the torque transmitted by the upper and lower transmission wires, and produce horizontal relative movement. The inner cylinder body will rotate with the spherical hinge, and the hanging hammer will hit the piezoelectric power generation unit in the horizontal direction due to the centrifugal force, and the first energy consumption will be achieved through collision. The piezoelectric power generation unit is attached to the pressure sensor and connected to the power extraction and storage unit. The power extraction and storage unit is connected to the current sensor, electromagnetic relay, ordinary switch and resistor to form a loop, converting mechanical energy into electrical energy, so that the resistor heats up to achieve the second energy consumption. The power extraction and storage unit forms another loop with the adsorption switch, hollow inductor and excitation coil. The greater the dancing amplitude of the wire, the more intense the hammer hits, the greater the pressure felt by the piezoelectric power generation unit, the greater the pressure signal released to the power extraction and storage unit through the pressure sensor, and the current value will also increase. When the current reaches a certain threshold, the electromagnetic relay will close the adsorption switch and energize the excitation coil. After power is turned on, the magnetic field strength of the excitation coil will change, causing the magnetorheological fluid in the vibration damping cylinder to produce greater viscosity, further reducing vibration and energy consumption. The pendulum is connected to the arc gear track bar on the arc track through an arc connecting rod. The other end of the arc gear track bar is connected to the piston through an arc connecting rod, and the other side of the piston is connected to the annular air spring. The annular air spring bypasses the inner cylinder and is connected to the piston at the other end. When the pendulum on one side swings, the piston on one side will pull the annular air spring to extend, and the annular air spring will give the pendulum an opposite force to hinder the pendulum from swinging. In addition, due to the existence of the annular air spring, the pendulums on both sides can transfer the vibration energy of the pendulum on one side to the other side, thereby achieving the effect of reducing vibration and energy consumption. There are gears on the arc-shaped gear track bar that mesh with it. The gears are connected to a gear shaft and can move coaxially with the runner in the damping liquid tank. The damping liquid tank is filled with damping liquid. When the pendulum swings in the horizontal direction, the pendulum will cause the arc-shaped track gear bar to slide along the arc-shaped track, so that the gear on the arc-shaped track will rotate. Since the gear and the runner move coaxially, the runner in the damping liquid tank will also rotate while the pendulum swings in the horizontal direction. However, due to the presence of damping liquid in the damping liquid tank, a damping force is generated when the runner rotates, thereby achieving the effect of vibration reduction and energy consumption.

[0019] When wind load acts on the anti-dancing device, the wind blades on both sides of the upper part of the outer cylinder can sense the wind load excitation from any wind direction, thereby driving the outer cylinder to rotate. The rotation of the outer cylinder can adjust the inner cylinder at the lower end of the spherical joint through the bearing, connecting shaft and spherical joint, so that it can rotate with the outer cylinder. The vibration reduction principle of the inner cylinder when the transmission wire dances in the horizontal direction, or the upper and lower transmission wires have relative movement in the horizontal direction, realizes vibration reduction and energy consumption in any wind direction, and enhances the vibration resistance of the anti-dancing device itself.

[0020] Compared with the prior art, the benefits of the present invention are:

[0021] The present invention is a multi-directional and multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device, which changes the singleness and limitations of passive control and unidirectional anti-dancing, makes the anti-dancing device more in line with the actual dancing destruction form, and achieves a better anti-dancing effect.

[0022] The present invention adopts a combination of a piezoelectric power generation unit and a magnetorheological fluid, and uses centrifugal force to make the hanging hammer hit the piezoelectric power generation unit, and then changes the value of the loop current through the pressure signal released by the pressure sensor to the power extraction and storage unit, thereby realizing semi-active control. When the vibration is more intense, the piezoelectric power generation unit connected to the power extraction and storage unit passes a larger current to the excitation coil, thereby changing the strength of the magnetic field to increase the viscosity of the magnetorheological fluid to achieve the effect of vibration reduction and energy consumption.

[0023] The present invention arranges a plurality of hanging weights along the circumference of the inner cylinder, and the inner cylinder can rotate with the spherical joint, thereby achieving vibration reduction and energy consumption effects in all directions and dimensions.

[0024] The present invention adopts homogeneous fiber reinforced composite material (FRP), and the interior of the outer cylinder adopts a hollow design form, which reduces the weight of the entire device and puts less burden on the power transmission line. At the same time, the design is reasonable, the installation and maintenance are simple, and the vibration reduction effect is obvious.

[0025] The present invention uses piezoelectric energy capture technology to convert mechanical energy into electrical energy and store it in the electrical energy extraction and storage unit. When the next vibration comes, the energy will be released to reduce the vibration. In addition, the present invention converts the curved motion of the piston and the pendulum on the shaped track into rotational motion, increasing energy consumption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0027] Figure 1 It is a schematic diagram of the overall structure of a multi-directional and multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device;

[0028] Figure 2 A top view of a multi-directional, multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device;

[0029] Figure 3 A detailed diagram of a vibration reduction cylinder of a multi-directional, multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device;

[0030] Figure 4 It is the AA section view of a multi-directional multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device;

[0031] Figure 5It is a schematic diagram of the relative position of the gear tracks of a multi-directional and multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device;

[0032] Figure 6 It is a circuit diagram of a multi-directional multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device;

[0033] Figure 7 It is a schematic diagram of the installation of a multi-directional and multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device;

[0034] In the figure: 1 outer cylinder, 2 damping cylinder, 3 inner cylinder, 4 spherical hinge, 5-1 connecting rod, 5-2 connecting rod, 5-3 connecting rod, 5-4 connecting rod, 6 spring, 7 piston rod, 8 suspension rod, 9 lifting ring, 10 hanging hammer, 11 blade, 12 first piston, 13 piezoelectric power generation unit, 14 power extraction and storage unit, 15 damping rubber pad, 16 excitation coil, 17 arc track, 18 gear, 19 fourth piston, 20 annular air spring, 21 arc gear track bar, 22 bearing, 23 connecting shaft, 24 spoke, 25 damping fluid, 26 steel plate, 27 piston rod built in damping cylinder, 28 second piston, 29 extension valve, 30 flow valve, 31 compression Valve, 32 compensation valve, 33 middle cavity, 34 upper cavity, 35 magnetorheological fluid, 36 liquid storage cylinder, 37 limit short rod, 38 damping net, 38-1 damping net, 38-2 damping net, 39-1 clamping device, 39-2 clamping device, 40 arc-shaped connecting rod, 41 connecting steel pipe, 42 gear shaft, 43 damping liquid tank, 44 limit plate, 45 current sensor, 46 electromagnetic relay, 47 ordinary switch, 48 resistor, 49 adsorption switch, 50 hollow inductor, 51 relay protection, 52 electronic component, 53 pressure sensor, 54 arc track limiter, 55 wheel, 56 lower cavity, 57 third piston, 58 channel, 59 protective sleeve, 60 wire. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, groups and / or combinations thereof;

[0037] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] Terminology explanation section: The terms "install", "connect", "connect", "fix" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The following is a detailed description of the implementation of the present invention in conjunction with the technical scheme and the accompanying drawings.

[0039] like Figure 1 As shown, this embodiment provides a multi-directional and multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device, including a cylindrical outer cylinder 1, the top of the outer cylinder 1 is closed and the bottom is open; blades 11 are welded at both ends of the top cylinder wall of the outer cylinder 1, and the blades 11 can sense the wind load excitation from any wind direction, thereby driving the outer cylinder to rotate; the top of the outer cylinder 1 is connected to the clamping device 39-1 through the upper connecting rod 5-1; the inner wall of the outer cylinder 1 is connected to the bearing 22 through the spokes 24, and the bearing 22 and the connecting shaft 23 are interference fit, and a spherical hinge 4 is provided under the connecting shaft 23, and the spherical hinge 4 is rigidly connected to the cylindrical inner cylinder 3 on the outside, that is, The spherical joint 4 is located in the inner cylinder 3, and the spherical joint 4 is connected to the vibration damping cylinder 2 with a lifting ring 9 on the top through a connecting rod 5. The upper end of the outer side of the vibration damping cylinder 2 is connected to a spring 6, and the lower end of the spring 6 is connected to the first piston 12 inside the inner cylinder 3. The first piston 12 inside the inner cylinder 3 is also connected to the lifting ring at the bottom of the vibration damping cylinder 2 through a connecting rod 5-3. The piston 12 is also connected to a piston rod 7 extending outside the inner cylinder 3, and the piston rod 7 is connected to another clamping device 39-2 at the bottom through another connecting rod 5-4; the clamping devices 39-1 and 39-2 are used to install the anti-dancing vibration damping device between the insulator strings of the overhead transmission line.

[0040] When wind load acts on the anti-dancing vibration reduction device, the blades 11 on both sides of the upper part of the outer cylinder 1 can sense the wind load excitation from any wind direction, thereby driving the outer cylinder 1 to rotate. The rotation of the outer cylinder 1 can adjust the inner cylinder 3 at the lower end of the spherical joint through the bearing 22, the connecting shaft 23, and the spherical joint 4, so that it can rotate with the outer cylinder 1.

[0041] An excitation coil 16 is wound around the outer wall of the inner cylinder 3, and four suspension rods 8 are hinged on the upper end of the side wall. Each suspension rod 8 is connected to a hanging hammer 10. Four hanging hammers 10 are evenly arranged along the circumferential direction of the inner cylinder to ensure that the anti-dancing device has a good vibration reduction effect in multiple dimensions. Each hanging hammer 10 includes a hammer wing and a hammer belly, and the hammer wing rests on a vibration-damping rubber pad 15; the vibration-damping rubber pad 15 is fitted with the piezoelectric power generation unit 13, so that when the hanging hammer 10 swings, the pressure of the hammer wing can be transmitted to the piezoelectric power generation unit 13 through the vibration-damping rubber pad 15. The piezoelectric power generation unit 13 is fitted with a pressure sensor 53, and the piezoelectric power generation unit 13 forms a closed loop with the power extraction and storage unit 14, the resistor 48, and the excitation coil 16.

[0042] Furthermore, the resistor 48 is connected in parallel with the excitation coil 16 in the closed loop, such as Figure 6 In the branch containing the resistor 48, a current sensor 45, an electromagnetic relay 46 and a common switch 47 are arranged before the resistor 48, and an adsorption switch 49 and an air-core inductor 50 are arranged in the branch containing the excitation coil 16. A relay protection device 51 is arranged between the entire circuit to protect the entire circuit.

[0043] Further, such as Figure 3 As shown, the damping cylinder 2 comprises a damping cylinder inner cavity core cylinder and a damping cylinder outer cavity liquid storage cylinder 36, the damping cylinder inner cavity core cylinder is provided with a second piston 28 and a third piston 57, the second piston 28 and the third piston 57 divide the damping cylinder inner cavity core cylinder into an upper cavity 34, a middle cavity 33 and a lower cavity 56 from top to bottom, the three cavities are all filled with magnetorheological fluid, and the lower cavity 56 is connected with the damping cylinder outer cavity liquid storage cylinder 36 through a reserved channel 58, the second piston 28 is connected with the damping cylinder outer cavity liquid storage cylinder 36 through a piston rod 27 built into the damping cylinder and a lifting ring 9, the second piston 28 is provided with an extension valve 29 and a flow valve 30, and can slide linearly up and down in the damping cylinder inner cavity, the third piston 57 is fixed on the cylinder wall of the damping cylinder inner cavity and is provided with a compression valve 31 and a compensation valve 32;

[0044] Furthermore, the extension valve 29, the flow valve 30, the compression valve 31 and the compensation valve 32 are composed of respective cones, connecting rods and baffles. The cones are connected to the baffles through connecting rods. The diameter of the connecting rods is smaller than the hole on the piston. Figure 3 As shown, when liquid flows into the hole on the piston, the liquid will push the conical surface to realize the flow of liquid between the cavities. The diameter of the bottom surface of the cone is larger than the diameter of the piston hole, so each valve only allows one-way flow of liquid; the extension valve 29 only allows the liquid in the upper chamber 34 of the damping cylinder to flow into the middle chamber 33 of the damping cylinder, and the flow valve 30 only allows the liquid in the middle chamber 33 of the damping cylinder to flow into the upper chamber 34 of the damping cylinder; the compression valve 31 only allows the liquid in the upper chamber 34 of the damping cylinder to flow into the middle chamber 33 of the damping cylinder; the compensation valve 32 only allows the liquid in the middle chamber 33 of the damping cylinder to flow into the upper chamber 34 of the damping cylinder.

[0045] Furthermore, the extension valve 29, the flow valve 30, the compression valve 31 and the compensation valve 32 are all provided with a damping net 38; a damping net 38-1 and a damping net 38-2 are provided in the liquid storage cylinder 36 of the outer cavity of the shock absorbing cylinder, and the function of the damping net 38, the damping net 38-1 and the damping net 38-2 is to increase the damping force when the magnetorheological fluid flows.

[0046] Further, such as Figure 1 , Figure 4 , Figure 5 As shown, an arc track 17 is arranged between the hanging hammer 10 and the inner cylinder 3, and an arc gear track bar 21 is placed on the arc track 17. The arc track 17 is connected to a damping liquid tank 43 through a connecting steel pipe 41. The damping liquid tank 43 is filled with damping liquid 25 and a rotating wheel 55. The gear shaft 42 passes through the rotating wheel 55 and the gear 18, so that the rotating wheel 55 and the gear 18 can rotate coaxially. The gear 18 is meshed with the arc gear track bar 21. One end of the arc gear track bar 21 is connected to the hanging hammer 10 through an arc connecting rod 40, and the other end is connected to the fourth piston 19 built into the arc track through the arc connecting rod 40. The other side of the fourth piston 19 built into the arc track is connected to the annular air spring 20.

[0047] Furthermore, the arc track 17, the damping fluid tank 43, the connecting steel pipe 41, the arc gear track bar 21, the gear 18, the gear shaft 42, and the arc connecting rod 40 are all wrapped with insulating materials.

[0048] Furthermore, the radius of the arc track 17, the arc gear track bar, and the arc connecting rod matches the length of the suspension rod, ensuring that the suspension hammer can move smoothly in the plane.

[0049] Furthermore, the spring 6 inside the inner cylinder 3 is made of a shape memory alloy material having good deformation recovery capability.

[0050] Furthermore, the outer cylinder 1 and the inner cylinder 3 are made of fiber reinforced composite material (FRP), which is light in weight, high in hardness, non-conductive and corrosion-resistant.

[0051] Furthermore, a layer of lubricating oil is coated on the inner wall of the inner cylinder 3 to ensure that there is only a small resistance when the piston moves. A limit plate 44 is provided at the lower part of the inner cylinder 3 to prevent the piston inside the inner cylinder from sliding out of the inner cylinder.

[0052] Furthermore, a rubber sealing ring is provided at the connection between the damping liquid tank filled with damping liquid and the gear shaft to prevent the damping liquid from overflowing from the damping liquid tank.

[0053] Furthermore, the volume of the piston rod built into the shock-absorbing cylinder 2 is smaller than the volume of the liquid storage cylinder in the outer cavity of the shock-absorbing cylinder, thereby ensuring that the shock-absorbing cylinder can be normally extended and retracted.

[0054] Furthermore, a limiting short rod 37 is provided on the piston in the damping cylinder 2 to prevent the valve from being blocked when the magnetorheological fluid flows.

[0055] In this embodiment, the anti-dancing device is installed between the insulator strings of the overhead transmission line. When stimulated by vertical vibration, the clamping device 39-1 and the clamping device 39-2 drive the piston rod 7 through the connecting rod to push the first piston 12 to make a linear motion up and down in the inner cylinder 3, and the spring 6 connected to the piston is squeezed and expanded in the inner cylinder 3, thereby reducing part of the vibration energy. The piston 7 is connected to the damping cylinder 2. When the damping cylinder 2 is compressed, the piston rod 27 in the damping cylinder 2 moves downward relative to the upper chamber 34 of the damping cylinder, the volume of the middle chamber 35 of the damping cylinder decreases, and the volume of the upper chamber 34 increases. The magnetorheological hydraulic opening and closing valve 30 of the middle chamber 35 squeezes into the upper chamber 34. Since the piston rod in the damping cylinder occupies part of the volume of the upper chamber, the increased volume of the upper chamber 34 is less than the reduced volume of the middle chamber 35, which results in that the magnetorheological fluid in the middle chamber 35 cannot flow completely to the upper chamber 34, and the excess liquid will enter the lower chamber 58 from the compression valve 29, and then enter the liquid storage cylinder 36 through the reserved channel 58. When the magnetorheological fluid flows through the circulation valve 30, the compression valve 29 and the liquid storage cylinder, it will generate a damping force through the damping net, thereby achieving the effect of vibration reduction and energy consumption; when the vibration damping cylinder is stretched, the piston in the vibration damping cylinder moves upward relative to the middle cavity 35 of the vibration damping cylinder, the volume of the upper cavity 34 of the vibration damping cylinder decreases, and the volume of the middle cavity 35 increases. The magnetorheological fluid pushes open the extension valve and enters the middle cavity 35. Due to the presence of the piston rod in the vibration damping cylinder, a certain vacuum degree is generated in the middle cavity 35, causing the magnetorheological fluid to flow from the liquid storage cylinder into the lower cavity 56 and then open the compensation valve 32 to be sucked into the middle cavity. Due to the presence of the damping net, when the magnetorheological fluid flows through the extension valve 31, the compensation valve 32 and the liquid storage cylinder, it will generate a damping force through the damping net, thereby achieving the effect of vibration reduction and energy consumption.

[0056] When the transmission wire dances in the horizontal direction, or the upper and lower transmission wires move relative to each other in the horizontal direction, the upper and lower clamping devices are stimulated by the horizontal vibration of the upper and lower transmission wires and the torque transmitted by the upper and lower transmission wires, and produce horizontal relative movement. The inner cylinder 3 is rotated through the spherical hinge 4 connected to the connecting rod, and the hanging hammer 10 hinged to the inner cylinder swings back and forth due to the centrifugal force. The hammer wing hits the piezoelectric power generation unit 13 in the horizontal direction, and the first energy consumption is achieved through collision. The piezoelectric power generation unit 13 is attached to the pressure sensor 53 and connected to the power extraction and storage unit 14. The power extraction and storage unit 14 is connected to the current sensor, electromagnetic relay, ordinary switch and resistor to form a loop, converting mechanical energy into electrical energy, causing the resistor 48 to heat up to achieve second energy consumption. The power extraction and storage unit forms another loop with the adsorption switch, air-core inductor and excitation coil. The greater the dancing amplitude of the wire, the more intense the hammer 10 hits, the greater the pressure felt by the piezoelectric power generation unit 13, the greater the pressure signal released to the power extraction and storage unit through the pressure sensor 53, and the greater the current value. When the current reaches a certain threshold, the electromagnetic relay 46 closes the adsorption switch and energizes the excitation coil. After energization, the magnetic field strength of the excitation coil will change, so that the magnetorheological fluid in the vibration damping cylinder will produce greater viscosity, further reducing vibration and energy consumption. In addition, when the pendulum 10 swings, the arc-shaped connecting rod 40 drags the arc-shaped gear track bar 21 to slide on the arc-shaped track 17, causing the gear 18 meshing with the arc-shaped gear track bar 21 to rotate. The rotation of the gear 18 will drive the rotating wheel in the damping liquid tank 43 to rotate through the gear shaft 42. The damping liquid in the damping liquid tank 43 will hinder the movement of the rotating wheel, generate a damping force, and achieve energy consumption and vibration reduction. At the same time, the arc-shaped track connected to the arc-shaped connecting rod has a built-in piston that squeezes the annular air spring 20, which can not only reduce vibration and energy consumption, but also squeeze the piston on the other side around the inner cylinder through the annular air spring 20, and further transfer the traction force to the pendulum 10 on the other side through the arc-shaped connecting rod to drag the arc-shaped gear track bar, on the one hand, realize the mutual restraint of the pendulums 10 on both sides, limit the swing amplitude of the pendulum 10, and prevent the swing amplitude from being too large. On the other hand, the transmission of vibration energy of the pendulums 10 on both sides is achieved, and the effect of further energy consumption and vibration reduction is achieved.

[0057] When wind load acts on the anti-dancing device, the wind blades on both sides of the upper part of the outer cylinder can sense the wind load excitation from any wind direction, thereby driving the outer cylinder 1 to rotate. The rotation of the outer cylinder 1 can adjust the inner cylinder 3 at the lower end of the spherical joint through the bearing, the connecting shaft, and the spherical joint 4, so that it can rotate with the outer cylinder 1. When the transmission line dances in the horizontal direction, or the upper and lower transmission lines have relative movement in the horizontal direction, the vibration reduction principle of the inner cylinder 3 is realized, and vibration reduction and energy consumption in any wind direction are realized, thereby enhancing the vibration resistance of the anti-dancing device itself.

[0058] The above implementation scheme of this patent is not intended to limit the scope of protection of the invention, and the implementation scheme of this patent is not limited to this. All other forms of modifications, replacements or changes made to the above structure of this patent based on the above content of this patent, in accordance with the common technical knowledge and customary means in this field, without departing from the above basic technical ideas of this patent, should fall within the scope of protection of this patent.

Claims

1. A multi-directional multi-stage semi-active piezoelectric energy capture anti-dancing vibration reduction device, characterized in that: It comprises an outer cylinder, blades are welded at both ends of the upper part of the outer cylinder, the outer cylinder is connected to the bearing through spokes, the bearing and the connecting shaft are interference fit, a spherical hinge is arranged under the connecting shaft, and the outer part of the spherical hinge is rigidly connected to the inner cylinder; the spherical hinge inside the inner cylinder is connected to a vibration-damping cylinder with a hanging ring on the top through a connecting rod, the vibration-damping cylinder is filled with magnetorheological fluid, a spring is wound around the outer upper end of the vibration-damping cylinder, the lower end of the spring is connected to the first piston inside the inner cylinder, and the first piston inside the inner cylinder is also connected to the hanging ring at the lower part of the vibration-damping cylinder through a connecting rod; an excitation coil is wound around the outer wall of the inner cylinder, a plurality of hanging rods are hinged at the outer upper end of the inner cylinder, each hanging rod is connected to a hanging hammer, and all hanging hammers are supported on a vibration-damping rubber pad, the inner side of the vibration-damping rubber pad is fitted with a piezoelectric power generation unit, so that the pressure of the hammer wing is transmitted to the piezoelectric power generation unit through the vibration-damping rubber pad when the hanging hammer swings; the piezoelectric power generation unit is fitted with a pressure sensor, and forms a closed loop with an electric energy extraction and storage unit, a resistor and an excitation coil.

2. A multi-directional multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device as claimed in claim 1, characterized in that: An arc track is arranged between each hanging hammer and the inner cylinder body, an arc gear track bar is placed on the arc track, a gear meshing with the arc track gear bar is arranged above the arc gear track bar, the arc track is connected to a damping liquid tank through a connecting steel pipe, the damping liquid tank is filled with damping liquid and a runner, and the gear shaft passes through the gear and the runner; one end of the arc gear track bar is connected to the hanging hammer, and the other end is connected to the fourth piston, and the built-in pistons in the arc track on both sides of the inner cylinder body are connected through air springs.

3. A multi-directional multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device as claimed in claim 1, characterized in that: The vibration damping cylinder comprises an inner cavity core cylinder and an outer cavity liquid storage cylinder. The inner cavity core cylinder is provided with a second piston and a third piston in sequence from top to bottom. The second piston and the third piston divide the inner cavity core cylinder into an upper cavity, a middle cavity and a lower cavity from top to bottom. The three chambers are all filled with magnetorheological fluid, and the lower cavity is connected with the outer cavity liquid storage cylinder through a reserved channel. The second piston is provided with an extension valve and a flow valve, which can slide linearly up and down in the inner chamber of the vibration damping cylinder. The third piston is fixed on the cylinder wall of the inner chamber of the vibration damping cylinder and is provided with a compression valve and a compensation valve.

4. A multi-directional multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device as claimed in claim 3, characterized in that: The second piston is connected to the lifting ring through a piston rod.

5. A multi-directional multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device as claimed in claim 3, characterized in that: The expansion valve, circulation valve, compression valve and compensation valve are all one-way valves. The expansion valve only allows the liquid in the upper chamber to flow into the middle chamber, and the circulation valve only allows the liquid in the middle chamber to flow into the upper chamber; the compression valve only allows the liquid in the upper chamber to flow into the middle chamber; and the compensation valve only allows the liquid in the middle chamber to flow into the upper chamber.

6. A multi-directional multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device as claimed in claim 3, characterized in that: The volume of the piston rod built into the vibration damping cylinder is smaller than the volume of the liquid storage cylinder in the outer cavity of the vibration damping cylinder.

7. A multi-directional multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device as claimed in claim 3, characterized in that: The second piston and the second piston are provided with a limited short rod.

8. The multi-directional multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device as claimed in claim 1, characterized in that: A damping net is arranged inside the extension valve, the flow valve, the compression valve, the compensation valve and the liquid storage cylinder inside the shock absorbing cylinder.

9. A multi-directional multi-stage semi-active piezoelectric energy capture and anti-dance vibration reduction device as claimed in claim 1, characterized in that: A first clamping device is connected to the top of the outer cylinder through a connecting rod, and a piston rod of the first piston passes through the inner cylinder and is connected to the second clamping device.

10. The multi-directional multi-stage semi-active piezoelectric energy capture and anti-dancing vibration reduction device as claimed in claim 1, characterized in that: The outer cylinder and the inner cylinder of the anti-dancing vibration reduction device are made of fiber-reinforced composite material.

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