CN110011257B - Torsional electromagnetic damping anti-galloping device - Google Patents
Torsional electromagnetic damping anti-galloping device Download PDFInfo
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- CN110011257B CN110011257B CN201910306804.7A CN201910306804A CN110011257B CN 110011257 B CN110011257 B CN 110011257B CN 201910306804 A CN201910306804 A CN 201910306804A CN 110011257 B CN110011257 B CN 110011257B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
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Abstract
The invention relates to a torsional electromagnetic damping type power line anti-galloping device which mainly comprises a stator and a rotor, wherein the stator and the rotor comprise electromagnetic structures, the stator and the rotor are disc-shaped excitation components or induction components, the electromagnetic damping anti-galloping device is installed and fixed on an existing multi-split sub-spacer which is installed and clamped on a power line, and the electromagnetic damping anti-galloping device absorbs power line galloping energy to generate damping to prevent the power line from galloping. The torsional electromagnetic damping anti-galloping device has the advantages of simple structure, easiness in installation, safety, reliability, low cost, good damping anti-galloping effect and the like.
Description
Technical Field
The invention relates to a torsional electromagnetic damping anti-galloping device, and belongs to the technical field of vibration control.
Background
The ice-coated galloping of the overhead transmission line conductor is a disaster form with high occurrence frequency, wide influence range and large loss, and the frequent galloping faults seriously threaten the safe and stable operation of a power grid. In the face of increasingly complex meteorological environment factors, safe, advanced, economic and reliable anti-galloping theories and scheme measures are needed to be taken as guarantees for building strong national power grids and ensuring long-term safe and stable operation of large power grids. The icing galloping of the power transmission line has the characteristics of complex generation mechanism, high prevention and control difficulty and strong destructive power, and is an internationally recognized problem in the field of overhead power transmission lines.
The conductor galloping is low-frequency and large-amplitude vibration, the amplitude can reach more than ten meters at most, and the galloping can be intensified continuously under the excitation of strong wind until a power transmission system is seriously damaged. Therefore, the hazards caused by the waving are various, and the light people have flashover and jump; the serious accident causes hardware and insulator damage, strand breakage and line breakage of the lead, looseness and falling of the tower bolt and even tower collapse.
The anti-galloping device commonly used at present comprises an interphase spacer, a double-pendulum anti-galloping device, a wire clamp rotary spacer, a detuning pendulum, an anti-galloping whip, an eccentric heavy hammer, a damping anti-galloping device, a spoiler and the like.
Although a great deal of research is carried out on the transformation of the spacer and the anti-galloping device in China, and the situation is relieved after certain measures are taken, the problems are not thoroughly solved. How to design and develop an anti-galloping device which has strong damping capacity, simple and reasonable structural form and convenient engineering application still remains the actual problem faced at present.
Disclosure of Invention
The invention relates to a torsional damping type electromagnetic anti-galloping device utilizing non-contact electromagnetic force, which is used for inhibiting galloping of a power transmission line.
A torsional electromagnetic damping anti-galloping device mainly comprises a stator and a rotor, wherein the stator is fixed on a multi-split sub-spacer clamped on a power line, the rotor is connected with a gravity pendulum, and the stator and the rotor are one of disc-shaped induction parts or excitation parts.
The electromagnetic damping anti-galloping device comprises an induction part, an excitation part, a rotating shaft and a gravity pendulum, wherein the induction part is a stator, the excitation part is a rotor, the two induction parts are positioned at two axial sides of the excitation part, two air gaps are formed between the two induction parts, the induction part mainly comprises a current conducting plate, a magnetic conducting plate and a shell, the current conducting plate is fixed at the air gap side of the magnetic conducting plate, one side of the magnetic conducting plate, which is not fixed with the current conducting plate, is fixed on the shell, the excitation part mainly comprises a substrate and permanent magnets, the magnetic poles of the permanent magnets are alternately arranged along the circumferential direction N, S and are sequentially fixed on the substrate, the magnetic poles of the permanent magnets are of an axial magnetizing structure or a Halbach array structure, the two induction parts are rotatably connected with the rotating shaft through bearings and are fixedly connected with the shell, the excitation part.
The electromagnetic damping anti-galloping device comprises an induction part, an excitation part, a rotating shaft and a gravity pendulum, wherein the induction part is a stator, the excitation part is a rotor, the two induction parts are positioned at two axial sides of the excitation part, two air gaps are formed among the two induction parts, the induction part mainly comprises guide bars, an inner end ring, an outer end ring, a magnetic conduction plate and a shell, the air gap side of the magnetic conduction plate is radially slotted, each slot is arranged along the circumferential direction, one guide bar is embedded in each slot, the outer end of each guide bar is connected with the outer end ring, the inner end of each guide bar is connected with the inner end ring, the excitation part mainly comprises a substrate and permanent magnets, permanent magnet poles are alternately arranged along the circumferential direction N, S and are sequentially fixed on the substrate, the permanent magnet is of an axial magnetizing structure or a Halbach array structure, the two induction parts are rotatably connected with the rotating shaft through a bearing and are fixedly connected with, the gravity pendulum is fixed at the end part of the rotating shaft extending out, and the lower end of the gravity pendulum is a pendulum bob.
The electromagnetic damping anti-galloping device comprises an induction part, an excitation part, a rotating shaft and gravity pendulums, wherein the excitation part is a stator, the induction part is a rotor, the two excitation parts are positioned on two axial sides of the induction part, two air gaps are formed between the two excitation parts, the induction part mainly comprises a current conducting plate and a magnetic conducting plate, the current conducting plate is fixed on two sides of the magnetic conducting plate, the excitation part mainly comprises a base plate, a permanent magnet and a shell, the permanent magnet magnetic poles are alternately arranged along the circumferential direction N, S and are sequentially fixed on the base plate, the permanent magnet magnetic poles are of an axial magnetizing structure or a Halbach array structure, the two excitation parts are rotatably connected with the rotating shaft and are fixedly connected with the frame through the shell, the induction part is fixedly connected with the rotating shaft, the two gravity pendulums are positioned between the two excitation.
The electromagnetic damping anti-galloping device comprises an induction part, an excitation part, a rotating shaft and a gravity pendulum, wherein the excitation part is a stator, the induction part is a rotor, the two excitation parts are positioned on two axial sides of the induction part, two air gaps are formed among the two excitation parts, the induction part mainly comprises guide bars, an inner end ring, an outer end ring and a magnetic conduction plate, two sides of the magnetic conduction plate are respectively provided with a groove along the radial direction, each groove is arranged along the circumferential direction, each groove is embedded with one guide bar, the outer end of each guide bar is connected with the outer end ring, the inner end of each guide bar is connected with the inner end ring, the whole body formed by the guide bars, the inner end ring and the outer end ring is arranged on two sides of the magnetic conduction plate, the excitation part mainly comprises a base plate, permanent magnets and a shell, permanent magnet poles are alternately arranged along the circumferential direction N, S and are sequentially fixed on the base plate, the permanent magnet is of, through shell and frame fixed connection, response part and pivot fixed connection, two gravity pendulums are located between two excitation part and the frame, are connected with the pivot, and the lower extreme of two gravity pendulums is the pendulum.
The electromagnetic damping anti-galloping device comprises an induction part, an excitation part, a rotating shaft, a gravity pendulum and a control circuit, wherein the induction part is a stator, the excitation part is a rotor, the two induction parts are positioned at two axial sides of the excitation part, two air gaps are formed among the three parts, the induction part mainly comprises coil windings and magnetic conduction plates, the air gaps of the magnetic conduction plates are radially grooved, all grooves are arranged along the circumferential direction, the coil windings are embedded in the grooves, leading-out wires of the coil windings are connected with the control circuit, the excitation part mainly comprises a base plate and permanent magnets, permanent magnet poles are alternately arranged along the circumferential direction N, S and are sequentially fixed on the base plate, the permanent magnet poles are of an axial magnetizing structure or a Halbach array structure, the two induction parts are rotatably connected with the rotating shaft through bearings and are fixedly connected with a shell, the excitation part is fixedly connected with the rotating shaft, and the, the lower end of the gravity pendulum is a pendulum bob.
The electromagnetic damping anti-galloping device comprises an induction part, an excitation part, a rotating shaft, a gravity pendulum and a control circuit, wherein the induction part is a stator, the excitation part is a rotor, the two induction parts are positioned on two axial sides of the excitation part, two air gaps are formed among the three parts, the induction part mainly comprises a coil winding and a magnetic conduction plate, the coil winding is fixed on the air gap side of the magnetic conduction plate, a leading-out wire of the coil winding is connected with the control circuit, the excitation part mainly comprises a substrate and permanent magnets, the magnetic poles of the permanent magnets are alternately arranged along the circumferential direction N, S and are sequentially fixed on the substrate, the magnetic poles of the permanent magnets are of an axial magnetizing structure or a Halbach array structure, the two induction parts are rotatably connected with the rotating shaft through bearings and are fixedly connected with a shell, the excitation part is fixedly connected with the rotating shaft, the gravity.
And the heating part of the control circuit is connected with the shell at the position needing deicing.
The rotating shaft of the electromagnetic damping anti-galloping device is connected with the gravity pendulum through the speed reducer, the gravity pendulum is connected with the low-speed shaft of the speed reducer, and the rotating shaft of the electromagnetic damping anti-galloping device is connected with the high-speed shaft of the speed reducer.
The conductive plate, the conducting bar, the inner end ring, the outer end ring or the coil winding of the electromagnetic damping anti-oscillation device induction part are made of copper or aluminum materials.
The electromagnetic damping anti-galloping device can also be in a radial magnetic field structure, and can be in an inner rotor structure or an outer rotor structure.
The invention relates to a torsional electromagnetic damping anti-galloping device, when a power line gallows, a multi-split sub-spacer gallops along with the power line, a stator of the electromagnetic damping anti-galloping device and a frame of the multi-split sub-spacer are relatively fixed and do not rotate along with a rotating shaft, a rotor rotates along with the rotating shaft, thereby causing the stator and the rotor to generate relative motion, the induction component cuts magnetic lines of force to generate eddy current, the eddy current generates electromagnetic field with polarity opposite to that of the magnetic field of the permanent magnet, the two electromagnetic fields with opposite polarities mutually hinder the movement to generate an eddy current damping effect, the swinging kinetic energy of the gravity pendulum is converted into heat energy generated by the eddy current, thereby realizing the energy consumption effect and the vibration reduction purpose, in addition, when the induction component comprises a loop or a coil, controllable current can be formed, the current is consumed through a control circuit to generate large heat, the heat is utilized, and the deicing effect near the torsional electromagnetic damping anti-galloping device can be realized to a certain extent.
In the design of the anti-galloping device, the pendulum weights and the lengths of the swing rods can be utilized to cover the whole galloping frequency range, so that the natural frequency of the system is far away from the frequency interval of vertical vibration and torsional vibration, and the aim of preventing the system from resonating is fulfilled.
Drawings
FIG. 1 is a schematic structural diagram of a torsional electromagnetic damping anti-galloping device.
Fig. 2 is a schematic diagram of the structure of the torsional electromagnetic damping anti-galloping device along the direction of the rotating shaft in the first embodiment.
FIG. 3 is a schematic view of a structure subdivision of the electromagnetic damping anti-galloping device in the first embodiment.
Fig. 4 is a schematic structural diagram of the sensing component in the second and fourth embodiments.
FIG. 5 is a schematic view of a third embodiment of the electromagnetic damping anti-galloping device in a split structure.
Fig. 6 is a schematic structural diagram of a sensing component in the fifth embodiment.
Detailed Description
A torsional electromagnetic damping anti-galloping device is mainly composed of a stator and a rotor, wherein the stator is fixed on a multi-split sub-spacer, and the stator and the rotor are one of disc-shaped induction parts or excitation parts, as shown in figure 1.
Fig. 2 is a first embodiment of the present invention. The electromagnetic damping anti-galloping device mainly comprises an induction part, an excitation part, a rotating shaft 7 and a gravity pendulum 6, wherein the induction part and the excitation part are disc-shaped, the rotating shaft 7 is connected with the shell 1 through a bearing, the two induction parts are located on two axial sides of the excitation part, and two air gaps are formed between the two induction parts and the three. The induction part mainly comprises current conducting plate 2, magnetic conduction plate 3 and shell 1, current conducting plate 2 is fixed in the air gap side of magnetic conduction plate 3, one side that magnetic conduction plate 3 does not fix current conducting plate 2 is fixed to shell 1, two induction parts pass through the bearing rotation with pivot 7 and are connected, and through shell 1 and the many splittings spacer fixed connection on the power line (the fixed connection of this application indicates that the mode that can not take place relative motion connects between two parts), the excitation part mainly comprises base plate 4 and permanent magnet 5, excitation part and pivot 7 fixed connection, permanent magnet 5 magnetic pole is N, S alternate arrangement along the circumferencial direction, fix on base plate 4 in proper order, permanent magnet 5 magnetic pole is axial magnetization structure or Halbach array structure, two gravity pendulums 6 are fixed at the tip that pivot 7 stretches out the shell, the lower extreme of gravity pendulum is the pendulum. When the power line waves, the multi-split sub-spacer swings along with the power line, the two induction parts of the electromagnetic damping anti-wave device and the multi-split sub-spacer are relatively fixed and do not rotate along with the rotating shaft 7, the excitation part rotates along with the rotating shaft 7, so that the current conducting plate 2 of the induction part cuts magnetic lines of force to generate eddy current, the eddy current generates an electromagnetic field with the polarity opposite to that of the magnetic field of the permanent magnet, and the two electromagnetic fields with the opposite polarities mutually hinder movement to generate an eddy current damping effect. The swing kinetic energy of the gravity pendulum is converted into heat energy generated by eddy current, the heat energy is consumed through conduction of air and the like, the swing amplitude of the gravity pendulum is smaller and smaller until the gravity pendulum stops under the effect of eddy current damping effect, the energy generated by power line galloping is finally converted into the heat energy generated by eddy current, the energy consumption effect is realized, and the purposes of vibration reduction and galloping prevention are achieved. The electromagnetic damping anti-oscillation device may have the induction component as a stator and the excitation component as a rotor as shown in fig. 1, or may have the excitation component as a stator and the induction component as a rotor.
The second embodiment is different from the first embodiment in the structure of the sensing component, and the rest of the structure is the same, in the second embodiment, see fig. 4, the sensing component mainly comprises a guide bar 12, an inner end ring 13, an outer end ring 14, a magnetic conductive plate 72 and a shell, a groove is formed in the air gap side of the magnetic conductive plate 72 along the radial direction, each groove is arranged along the circumferential direction, one guide bar 12 is embedded in each groove, the outer end of each guide bar 12 is connected with the outer end ring 14, and the inner end of each guide bar 12 is connected with the inner end ring 13.
The third embodiment, see fig. 5, a torsional electromagnetic damping anti-galloping device, characterized in that the electromagnetic damping anti-galloping device is mainly composed of an induction component and an excitation component, the induction component or the excitation component is disc-shaped, the two excitation components are located at two axial sides of the induction component, two air gaps are formed between the three, the induction component is mainly composed of a conductive plate 63 and a magnetic conductive plate 73, the conductive plate 63 is pasted and fixed at two sides of the magnetic conductive plate 73, the excitation component is mainly composed of a base plate 93, a permanent magnet 103 and a shell 83, magnetic poles of the permanent magnet 103 are alternately arranged along a circumferential direction N, S and are sequentially fixed on the base plate 93, the magnetic poles of the permanent magnet 103 are of an axial magnetizing structure or a Halbach array structure, the two excitation components are rotatably connected with a rotating shaft 7 through bearings, the shell 83 is fixedly connected with a multi-split sub-spacer, the induction component is fixedly connected with the, two excitation parts of the electromagnetic damping anti-galloping device are relatively fixed with the shell 83 and do not rotate along with the rotating shaft 7, the induction part rotates along with the rotating shaft 7, so that the conducting plate 63 of the induction part cuts magnetic lines of force to generate eddy current, the eddy current generates an electromagnetic field with the polarity opposite to that of the magnetic field of the permanent magnet, the two electromagnetic fields with the opposite polarities mutually hinder movement, and an eddy current damping effect is generated. The swing of the gravity pendulum is converted into heat energy generated by the eddy current, and the heat energy is consumed through conduction of air and the like. Under the action of eddy current damping effect, the gravity pendulum has lower and lower swinging speed and smaller angle until stopping. The energy of the power line during vibration is finally converted into heat energy generated by eddy current, so that the energy consumption effect is realized, and the aims of vibration reduction and anti-galloping are fulfilled. The electromagnetic damping anti-oscillation device may be configured such that the exciting member is a stator and the induction member is a rotor as shown in fig. 5, or the induction member is a stator and the exciting member is a rotor.
The fourth embodiment is different from the third embodiment in the structure of the sensing element, and the rest of the structure is the same, in the fourth embodiment, the sensing element mainly comprises the conducting bars, the inner end ring, the outer end ring and the magnetic conducting plate, the specific structure is shown in fig. 4, the two sides of the magnetic conducting plate are respectively provided with a groove along the radial direction, the conducting bars are arranged along the circumferential direction of each groove, the whole body formed by the conducting bars, the inner end ring and the outer end ring is arranged on the two sides of the magnetic conducting plate, and the conducting plates arranged on the two sides of the magnetic conducting plate in the third embodiment are replaced.
The fifth embodiment is different from the first embodiment in the structure of the induction component, the rest of the structure is the same, in the fifth embodiment, see fig. 6, the induction component mainly comprises a winding and a magnetic conduction plate 75, a slot is formed on the air gap side of the magnetic conduction plate along the radial direction, each slot is arranged along the circumferential direction, a coil winding 651 is embedded in each slot, the leading-out wire of the coil winding 651 is connected with a control circuit 652, the heating part of the control circuit 652 is attached with the outer shell, when the power line waves, the multi-split sub spacer swings along with the power line, two induction components of the electromagnetic damping anti-swing device are not moved relative to the outer shell and do not rotate along with the rotating shaft 7, the excitation component rotates along with the rotating shaft 7, thereby causing the coil winding 651 of the induction component to cut the magnetic line, thereby generating current in the coil winding 651, the current generates heat through the control circuit 652 control loss, thereby realizing, and the part that generates heat of control circuit 652 is laminated with the shell mutually to can be with on the electromagnetic damping anti-galloping ware of heat conduction, will be melted when having ice on the anti-galloping ware, play the effect of deicing to a certain extent, this embodiment is applicable to ice rain weather, the region that freezes easily, when with vibration energy consumption, can be with the effectual utilization of the heat that generates. The electromagnetic damping anti-galloping device can enable the induction part to be a stator and the excitation part to be a rotor, and can also enable the excitation part to be a stator and the induction part to be a rotor.
The sixth embodiment is different from the fifth embodiment in the fixing manner of the coil winding, and the rest of the structure is the same.
As an alternative embodiment, the rotating shaft of the electromagnetic damping anti-galloping device and the gravity pendulum can be connected through a speed reducer, the gravity pendulum is connected with a low-speed shaft of the speed reducer, and the rotating shaft of the electromagnetic damping anti-galloping device is connected with a high-speed shaft of the speed reducer.
The conductive plate, the conducting bar, the inner end ring, the outer end ring or the coil winding of the electromagnetic damping anti-oscillation device induction part are made of copper or aluminum materials.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (3)
1. A torsional electromagnetic damping anti-galloping device mainly comprises a damper containing a stator and a rotor electromagnetic structure, wherein the electromagnetic damping anti-galloping device is fixedly installed on a multi-splitter spacer clamped on a power line in the prior art, the electromagnetic damping anti-galloping device mainly comprises a stator and a rotor, the stator and a shell are fixed on the multi-splitter spacer, and the rotor is connected with a gravity pendulum through a rotating shaft which is fixed together. The outgoing line of the coil winding is connected with a control circuit, an excitation part mainly comprises a substrate and permanent magnets, the magnetic poles of the permanent magnets are alternately arranged along the circumferential direction N, S and are sequentially fixed on the substrate, the magnetic poles of the permanent magnets are of an axial magnetizing structure or a Halbach array structure, two induction parts are rotatably connected with a rotating shaft through bearings and fixedly connected with a shell, the excitation part is fixedly connected with the rotating shaft, a gravity pendulum is fixed at the extending end part of the rotating shaft, the lower end of the gravity pendulum is a pendulum, and the heating part of the control circuit is attached to a position needing deicing.
2. A torsional electromagnetic damping anti-galloping device mainly comprises a damper containing a stator and a rotor electromagnetic structure, wherein the electromagnetic damping anti-galloping device is fixedly installed on a multi-splitter spacer clamped on a power line in the prior art and mainly comprises a stator and a rotor, the stator and a shell are fixed on the multi-splitter spacer, and the rotor is connected with a gravity pendulum through a rotating shaft which is fixed together. The permanent magnet magnetic poles are arranged alternatively along the circumferential direction N, S and fixed on the substrate in sequence, the permanent magnet magnetic poles are of an axial magnetizing structure or a Halbach array structure, two induction parts are rotatably connected with the rotating shaft through bearings and fixedly connected with the shell, the excitation part is fixedly connected with the rotating shaft, the gravity pendulum is fixed at the end part of the rotating shaft extending out, the lower end of the gravity pendulum is a pendulum bob, and the heating part of the control circuit is attached to the position needing deicing.
3. The torsional electromagnetic damping anti-galloping device according to any one of claims 1 to 2, wherein the electromagnetic damping anti-galloping device rotating shaft is connected with the gravity pendulum through a speed reducer, the gravity pendulum is connected with a low-speed shaft of the speed reducer, and the electromagnetic damping anti-galloping device rotating shaft is connected with a high-speed shaft of the speed reducer.
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| CN201910306804.7A CN110011257B (en) | 2019-04-17 | 2019-04-17 | Torsional electromagnetic damping anti-galloping device |
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| CN201910306804.7A CN110011257B (en) | 2019-04-17 | 2019-04-17 | Torsional electromagnetic damping anti-galloping device |
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| CN110071470A (en) * | 2019-06-14 | 2019-07-30 | 哈尔滨工业大学 | A kind of torsion damp type electromagnetism anti-dance device |
| CN110937498B (en) * | 2019-12-17 | 2020-11-10 | 河南卫华重型机械股份有限公司 | Crane hoisting mechanism with permanent magnet damping |
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| CN101345122B (en) * | 2008-05-19 | 2010-10-13 | 哈尔滨工业大学 | Direct current flux control type adjustable reactor |
| CN101593956A (en) * | 2008-05-29 | 2009-12-02 | 四平线路器材厂 | Quadrifid insulated damping conductor spacer |
| CN101630825B (en) * | 2009-06-25 | 2011-11-09 | 浙江泰昌实业有限公司 | Reinforced type lead wire damping spacer |
| CN104467358A (en) * | 2014-11-21 | 2015-03-25 | 夏宇轩 | Permanent magnet eddy current brake device |
| CN105896879B (en) * | 2016-06-17 | 2018-09-07 | 哈尔滨工业大学 | Permanent torque Permanent magnet eddy-current brake device |
| CN107872040B (en) * | 2016-09-23 | 2021-06-22 | 中国电力科学研究院 | Combined anti-galloping device based on energy consumption and detuning principle |
| CN109557849A (en) * | 2018-11-28 | 2019-04-02 | 王和中 | A kind of drainage thread waves adjusting and monitoring device |
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