Anti-vibration power generation device for power transmission line

Abstract

The invention discloses a power transmission line anti-vibration power generation device which comprises a wire clamp connected with a power transmission line, and the wire clamp is connected with a power generation part. The power generation part comprises a wind power generation assembly and a vibration power generation assembly; the wind power generation assembly comprises a center shaft connected with the wire clamp and a stator and a rotor which are connected to the center shaft in a sleeving mode, the stator is fixedly connected with the center shaft, the rotor is rotationally connected with the center shaft, and the rotor is connected with a wind power driving part; the vibration power generation assembly is fixedly connected with the stator and comprises two electrode plates and particles arranged between the two electrode plates and used for vibration power generation and vibration prevention. In a breeze vibration environment of a power transmission line, rotary (wind energy) and vibration (mechanical vibration) power generation is combined, the energy collection efficiency is improved, the device adapts to different environmental conditions, and wire vibration energy and environmental wind energy can be collected while vibration of a power transmission wire is restrained.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation, and specifically to a vibration-proof power generation device for transmission lines. Background Art

[0002] With the integrated development of the intelligent construction of the power grid, an increasing number of power electronic devices are connected to the power system. A huge sensing network formed by a large number of various sensors can meet the monitoring requirements of the power system. However, in complex environments such as transmission lines in remote areas, if the widely distributed sensor nodes rely on manual battery replacement, the workload is extremely huge. It is worth noting that there are rich micro-energy forms in the transmission line, which creates a broad space for the application of distributed energy harvesting devices and also brings new opportunities to solve the problem of self-powered sensing for transmission lines.

[0003] In transmission lines, aeolian vibration is a relatively common phenomenon. When a stable wind speed of 0.5 - 10 m / s blows towards the transmission conductor, Karman vortices that alternate up and down are generated on the leeward side of the transmission conductor, causing an up-and-down alternating force to act on the transmission conductor, and then the conductor generates vertical vibration. The frequency of aeolian vibration usually ranges from 5 Hz to 50 Hz, and its vibration amplitude is relatively small, generally within the diameter of the conductor, but usually lasts for a long time. Long-term aeolian vibration will cause fatigue cracks in the conductor under the action of alternating stress. In order to reduce the harm of aeolian vibration to the transmission line, vibration dampers are usually installed on the transmission conductor. The vibration damper can absorb the vibration energy of the transmission line, thereby suppressing the vibration of the transmission line. If a power generation device is integrated on the vibration damper, while realizing the vibration damping function, it can also have an energy harvesting function, and supply the generated electric energy to the sensors of the transmission line, enabling the vibration damper to change from a single vibration damping device to a multifunctional device, realizing self-powered sensing while damping vibration. This effectively improves the comprehensive benefits of the device and realizes the expansion and optimization of functions.

[0004] In 2020, the literature [Applied Energy 267(2020)114898] proposed a piezoelectric vibration energy harvester based on the structure of a vibration damper. This research realized the dual functions of vibration suppression and energy harvesting by integrating piezoelectric fibers into the structure of the transmission line vibration damper. However, this device can only collect vibration energy singly and fails to effectively utilize various micro-energy forms (such as wind energy, electric field energy, solar energy, etc.) widely existing in the transmission line environment, which limits its energy harvesting efficiency and application potential.

[0005] In this context, triboelectric nanogenerators based on the coupling effect of triboelectrification and electrostatic induction exhibit unique advantages. Triboelectric nanogenerators have broadband response characteristics and multi-energy compatibility capabilities: in a gentle breeze and vibration environment, triboelectric nanogenerators can simultaneously capture the mechanical vibration energy of transmission lines and environmental wind energy, and efficiently convert them into electrical energy. By systematically integrating triboelectric nanogenerators with the structure of vibration dampers, self-powered sensing of transmission lines can be achieved, providing power for small monitoring devices on transmission lines. Real-time perception of key parameters such as vibration status, temperature, and icing can be realized, completely getting rid of the dependence on manual maintenance of traditional battery power supply solutions. Summary of the Invention

[0006] The object of the present invention is to provide a vibration damping and power generation device for transmission lines, solve the power supply problem faced by on-line monitoring devices of transmission lines in the field environment, and innovatively propose a power generation device based on the structure of vibration dampers. This device can simultaneously capture wind energy and mechanical vibration energy and efficiently convert them into electrical energy under the combined working conditions of gentle breeze and conductor vibration, realizing the on-site self-powered operation of small electronic devices.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A vibration damping and power generation device for transmission lines includes a clamp connected to the transmission line, and the clamp is connected to a power generation part;

[0009] The power generation part includes a wind power generation component and a vibration power generation component;

[0010] The wind power generation component includes a central shaft connected to the clamp, and a stator and a rotor sleeved on the central shaft. The stator is fixedly connected to the central shaft, the rotor is rotatably connected to the central shaft, and the rotor is connected to a wind power driving part;

[0011] The vibration power generation component is fixedly connected to the stator, and the vibration power generation component includes two electrode plates and particles arranged between the two electrode plates for vibration power generation and vibration damping.

[0012] As a further solution of the present invention: mounting holes for connecting to the transmission line are provided on the clamp, a steel strand is fixedly connected to one side of the clamp away from the mounting hole, and the central shaft is fixedly connected to the clamp through the steel strand.

[0013] As a further solution of the present invention: steel strands are arranged on the clamp, the steel strands are fixedly connected to the central shaft through couplings, and power generation parts are fixedly connected to both ends of the steel strands.

[0014] As a further solution of the present invention: the stator includes an inner cylinder, the rotor includes an outer cylinder coaxially arranged with the inner cylinder, and the outer cylinder is sleeved outside the inner cylinder.

[0015] As a further solution of the present invention: a thin film array is arranged along the axial direction outside the inner cylinder. The thin film array includes alternately arranged first friction units and second friction units. An electrode array cooperating with the thin film array is arranged along the axial direction on the inner wall of the outer cylinder. The electrode array includes alternately arranged first electrodes and second electrodes. A charge replenishing unit is arranged on the inner wall of the outer cylinder, and the charge replenishing unit is in contact with the thin film array.

[0016] As a further solution of the present invention: at least one end of the inner cylinder is provided with an inner cylinder cover plate. The central shaft is coaxially and fixedly connected with the inner cylinder cover plate. Both ends of the outer cylinder are provided with outer cylinder cover plates. The middle part of the outer cylinder cover plate is rotationally connected with the central shaft through a bearing.

[0017] As a further solution of the present invention: the wind driving member includes a fan blade arranged outside the outer cylinder.

[0018] As a further solution of the present invention: multiple groups of vibration power generation components are arranged inside the stator.

[0019] As a further solution of the present invention: the electrode plate includes an upper plate, a third electrode on the lower side of the upper plate, a lower plate, and a fourth electrode on the upper side of the lower plate.

[0020] As a further solution of the present invention: the upper plate and the lower plate are fixedly connected to the inner wall of the stator. The honeycomb frame is fixedly connected between the third electrode and the fourth electrode. A plurality of through holes leading from one side of the third electrode to the other side of the fourth electrode are provided inside the honeycomb frame. The particles are damping particles, and the damping particles are arranged in the through holes.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In the micro-vibration environment of the transmission line, the present invention combines rotational (wind energy) and vibrational (mechanical vibration) power generation to improve the energy collection efficiency, adapt to different environmental conditions, and can collect wire vibration energy and environmental wind energy simultaneously.

[0023] 2. The traditional vibration damper only has the function of vibration reduction and cannot generate electricity. The present invention embeds the triboelectric nanogenerator into the traditional vibration damper structure, without occupying additional space, and directly utilizes the characteristics of the existing facilities. It makes the vibration damper become a multi-functional device, and the generated electric energy can supply power for small sensors on the transmission line, realizing self-powered sensing, without installing additional power supply devices, and reducing the deployment difficulty of the sensors.

[0024] 3. The damping particles serve both as power generation units and as dynamic mass blocks to enhance the vibration absorption capacity, increasing the vibration damping ability of the vibration damper; the honeycomb frame conducts the random collision energy to the electrode plate in a directional manner by restricting the movement trajectory of the particles, and at the same time reduces the fatigue damage of key components through the stress dispersion mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the power generation device based on the vibration damper structure in this embodiment;

[0026] Figure 2 is a schematic structural diagram of the power generation part in this embodiment;

[0027] Figure 3 is a schematic structural diagram of the rotor in this embodiment;

[0028] Figure 4 is a schematic structural diagram of the outer cylinder cover in this embodiment;

[0029] Figure 5 is a schematic structural diagram of the stator in this embodiment;

[0030] Figure 6 is a schematic structural diagram of the vibration power generation assembly in this embodiment.

[0031] In the figure:

[0032] 1 - wire clamp, 2 - power generation part, 3 - coupling, 4 - steel strand, 21 - rotor, 22 - stator, 23 - vibration power generation assembly, 211 - outer cylinder, 212 - fan blade, 213 - electrode array, 214 - charge replenishment unit, 215 - outer cylinder cover plate, 216 - bearing, 221 - inner cylinder, 222 - thin film array, 223 - inner cylinder cover plate, 24 - central shaft, 231 - upper electrode plate, 232 - lower electrode plate, 233 - third electrode, 234 - fourth electrode, 235 - honeycomb frame, 236 - damping particles. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figure 1-6, in the embodiment of the present invention, a vibration-proof power generation device for a transmission line includes a clamp 1 connected to the transmission line. The clamp 1 is connected to a power generation unit 2. In this embodiment, the clamp 1 is provided with mounting holes for connecting to the transmission wire, and the clamp 1 is fixed to the transmission wire through the mounting holes. On one side of the clamp 1 away from the mounting holes, a steel strand 4 is fixedly connected. The clamp 1 and the coupling 3 are made of 3D-printed PLA material, and the steel strand 4 is composed of multiple steel wires stranded together.

[0035] The power generation unit 2 includes a wind power generation component and a vibration power generation component. As Figure 2-5 shown, the wind power generation component includes a central shaft 24 connected to the clamp 1. The central shaft 24 is fixedly connected to the steel strand 4 through the coupling 3. The stator 22 is fixedly connected to the central shaft 24, and the rotor 21 is rotatably connected to the central shaft 24. The rotor 21 is connected to a wind power driving member. The wind power driving component is a fan blade 212 arranged outside the rotor. The stator 22 includes an inner cylinder 221, and the rotor 21 includes an outer cylinder 211 arranged coaxially with the inner cylinder 221. The outer cylinder 211 is sleeved outside the inner cylinder 221. At least one end of the inner cylinder 221 is provided with an inner cylinder cover plate 223, and the central shaft 24 is fixedly connected coaxially with the inner cylinder cover plate 223. Both ends of the outer cylinder 211 are provided with outer cylinder cover plates 215, and the middle of the outer cylinder cover plates 215 is rotatably connected to the central shaft 24 through bearings 216.

[0036] In this embodiment, the outer cylinder 211 is made of an acrylic cylinder with an inner diameter of 70 mm, an outer diameter of 75 mm, and a height of 140 mm; the outer cylinder cover plate 215 is made of an acrylic plate with an outer diameter of 75 mm, an inner diameter of 16 mm, and a thickness of 3 mm; the bearing 216 is a bidirectional bearing with an inner diameter of 8 mm, an outer diameter of 16 mm, and a thickness of 4 mm, and is embedded in the center of the outer cylinder cover plate 215. The inner cylinder 221 is made of an acrylic cylinder with an inner diameter of 60 mm, an outer diameter of 65 mm, and a height of 120 mm; the inner cylinder cover plate 223 is made of an acrylic plate with an outer diameter of 65 mm, an inner diameter of 8 mm, and a thickness of 3 mm. The central shaft 24 is made of a carbon fiber rod with a diameter of 8 mm and a length of 150 mm.

[0037] A thin film array 222 is arranged along the axial direction outside the inner cylinder 221. The thin film array 222 includes alternately arranged first friction units and second friction units. An electrode array 213 cooperating with the thin film array 222 is arranged along the axial direction on the inner wall of the outer cylinder 211. The electrode array 213 includes alternately arranged first electrodes and second electrodes. A charge replenishing unit 214 is arranged on the inner wall of the outer cylinder 211, and the charge replenishing unit 214 is in contact with the thin film array 222.

[0038] In this embodiment, the electrode array 213 is composed of 18 rectangular copper foils. The length and width of a single copper foil are 120 mm and 10 mm respectively, and the thickness is 60 μm. The sheet-like film array 222 is composed of 10 first friction units and 10 second friction units arranged alternately at intervals. The first friction unit is made of polytetrafluoroethylene film, and the second friction unit is made of nylon film. The first friction unit and the second friction unit have the same size, with a length of 120 mm, a width of 10 mm, and a thickness of 25 μm. The charge replenishment unit 214 is made of rabbit hair strips. The rabbit hair strips are 120 mm long, 10 mm wide, and the length of a single rabbit hair is about 2.5 mm. The gap between the sheet-like film array and the electrode array is 2.5 mm.

[0039] As Figure 6 shown, multiple vibration power generation components are arranged inside the stator 22. The vibration power generation components are fixedly connected to the central shaft 24 or the stator 22. The vibration power generation components include two electrode plates and a honeycomb frame 235, and particles for vibration power generation and vibration prevention arranged inside the honeycomb frame 235. The electrode plates include an upper electrode plate 231, a third electrode 233 on the lower side of the upper electrode plate 231, a lower electrode plate 232, and a fourth electrode 234 on the upper side of the lower electrode plate 232. The honeycomb frame 235 is fixedly connected between the third electrode 233 and the fourth electrode 234. A plurality of through holes leading from one side of the third electrode 233 to the other side of the fourth electrode 234 are provided inside the honeycomb frame 235. The particles are damping particles 236, and the damping particles 236 are arranged inside the through holes.

[0040] In this embodiment, the upper electrode plate 231 and the lower electrode plate 232 are made of acrylic plates with a thickness of 4 mm. The third electrode 233 and the fourth electrode 234 are composed of copper foils with a thickness of 60 μm covering the acrylic plates. The honeycomb frame 235 is made of 3D printed PLA material. The honeycomb frame contains 71 regular hexagonal through holes to form the densest arrangement. One damping particle 236 is placed inside each regular hexagonal through hole, and the damping particle 236 is a polytetrafluoroethylene small ball with a diameter of 6 mm.

[0041] When the present invention is in use, the wire clamp 1 is installed on the power transmission line. When the aeolian vibration of the power transmission line occurs, the breeze will blow the fan blades 212 on the outer cylinder 211, thereby driving the rotor 21 to rotate. When the rotor 21 rotates relative to the stator 22, the charge replenishment unit 214 on the rotor reciprocally rubs against the first friction unit and the second friction unit. Since the electron gain ability of the rabbit hair strip is less than that of the first friction unit, when the rabbit hair strip rubs against the first friction unit, the rabbit hair strip becomes positively charged and the first friction unit becomes negatively charged; since the electron gain ability of the rabbit hair strip is greater than that of the second friction unit, when the rabbit hair strip rubs against the second friction unit, the rabbit hair strip becomes negatively charged and the second friction unit becomes positively charged; therefore, there will be a potential difference between the first friction unit and the second friction unit. Since the electrode array 213 and the sheet-like thin film array 222 are very close, electrostatic induction causes a potential difference to be generated between the first electrode and the second electrode. If the first electrode and the second electrode are connected through an external circuit to form a path, then an alternating current will flow through the external circuit. At this time, the rotating friction nanogenerator can collect the wind energy of the power transmission line and convert it into electrical energy.

[0042] And when the aeolian vibration occurs, due to the characteristics of the cantilever beam structure of the vibration damper, the steel strand 4 will bend, and its power generation part 2 will also vibrate up and down to absorb the vibration energy of the power transmission line. When the vibration damper vibrates, the polytetrafluoroethylene balls in the honeycomb frame 235 will reciprocally jump between the upper and lower electrode plates after obtaining sufficient mechanical energy. The electron gain ability of polytetrafluoroethylene is greater than that of the copper electrode. Therefore, when the polytetrafluoroethylene ball contacts the copper electrode, the polytetrafluoroethylene ball becomes negatively charged and the copper electrode becomes positively charged. When the ball moves up and down in the honeycomb frame, electrostatic induction causes a potential difference to be generated between the third electrode 233 and the fourth electrode 234. If the third electrode and the fourth electrode are connected through an external circuit to form a path, then an alternating current will flow through the external circuit. At this time, the vibration friction nanogenerator can collect the vibration energy of the power transmission line and convert it into electrical energy.

[0043] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0044] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A transmission line vibration-proof power generation device, comprising a wire clamp (1) connected to a transmission line, characterized in that: The wire clamp (1) is connected to a power generation unit (2); The power generation unit (2) includes a wind power generation component and a vibration power generation component; The wind power generation assembly comprises a central shaft (24) connected to the wire clamp (1), and a stator (22) and a rotor (21) sleeved on the central shaft (24); the stator (22) is fixedly connected to the central shaft (24); the rotor (21) is rotatably connected to the central shaft (24); and the rotor (21) is connected to a wind driving member; The vibration power generation component is fixedly connected to the stator (22), and the vibration power generation component comprises two electrode plates and particles arranged between the two electrode plates for vibration power generation and vibration prevention.

2. A power transmission line vibration-proof power generation device according to claim 1, characterized in that: The wire clamp (1) is provided with a mounting hole for connecting to a power transmission line, a steel strand (4) is fixedly connected to a side of the wire clamp (1) away from the mounting hole, and the central axis (24) is fixedly connected to the wire clamp (1) via the steel strand (4).

3. A power transmission line vibration-proof power generation device according to claim 2, characterized in that: A steel strand (4) is arranged on the wire clamp (1), the steel strand (4) is fixedly connected to the central shaft (24) via a coupling (3), and both ends of the steel strand (4) are fixedly connected to a power generation unit (2).

4. A power transmission line vibration-proof power generation device according to claim 1, characterized in that: The stator (22) comprises an inner cylinder (221), and the rotor (21) comprises an outer cylinder (211) arranged coaxially with the inner cylinder (221), wherein the outer cylinder (211) is sleeved on the outside of the inner cylinder (221).

5. A power transmission line vibration-proof power generation device according to claim 4, characterized in that: A thin film array (222) is arranged on the outside of the inner cylinder (221) along the axial direction, and the thin film array (222) includes first friction units and second friction units that are alternately arranged. An electrode array (213) that cooperates with the thin film array (222) is arranged on the inner wall of the outer cylinder (211) along the axial direction, and the electrode array (213) includes first electrodes and second electrodes that are alternately arranged. A charge replenishment unit (214) is arranged on the inner wall of the outer cylinder (211), and the charge replenishment unit (214) is in contact with the thin film array (222).

6. A power transmission line vibration-proof power generation device according to claim 4, characterized in that: An inner cylinder cover plate (223) is provided at at least one end of the inner cylinder (221), the central shaft (24) is coaxially fixedly connected to the inner cylinder cover plate (223), and outer cylinder cover plates (215) are provided at both ends of the outer cylinder (211), and the middle part of the outer cylinder cover plate (215) is rotatably connected to the central shaft (24) via a bearing (216).

7. A power transmission line vibration-proof power generation device according to claim 4, characterized in that: The wind-driven component comprises a fan blade (212) arranged outside the outer cylinder (211).

8. The power transmission line vibration-proof power generation device according to claim 1, characterized in that: A plurality of groups of vibration power generation components are arranged in the stator (22).

9. A power transmission line vibration-proof power generation device according to claim 1 or 8, characterized in that: The electrode plate comprises an upper electrode plate (231), a third electrode (233) on the lower side of the upper electrode plate (231), a lower electrode plate (232), and a fourth electrode (234) on the upper side of the lower electrode plate (232); a honeycomb frame (235) is fixedly connected between the third electrode (233) and the fourth electrode (234).

10. A power transmission line vibration-proof power generation device according to claim 9, characterized in that: The upper electrode plate (231) and the lower electrode plate (232) are fixedly connected to the inner wall of the stator (22); the honeycomb frame (235) is fixedly connected between the upper electrode plate (231) and the lower electrode plate (232); a plurality of through holes are provided in the honeycomb frame (235) from one side of the third electrode (233) to one side of the fourth electrode (234); the particles are damping particles (236), and the damping particles (236) are arranged in the through holes.

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