CN110061468B - Transmission line vibration damper based on eddy current energy consumption technology - Google Patents
Transmission line vibration damper based on eddy current energy consumption technology Download PDFInfo
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- CN110061468B CN110061468B CN201910432863.9A CN201910432863A CN110061468B CN 110061468 B CN110061468 B CN 110061468B CN 201910432863 A CN201910432863 A CN 201910432863A CN 110061468 B CN110061468 B CN 110061468B
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- sliding block
- eddy current
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 47
- 238000005265 energy consumption Methods 0.000 title claims abstract description 31
- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052802 copper Inorganic materials 0.000 claims abstract description 26
- 239000010949 copper Substances 0.000 claims abstract description 26
- 238000013016 damping Methods 0.000 claims abstract description 17
- 230000009467 reduction Effects 0.000 claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 239000012212 insulator Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
- F16F15/035—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means by use of eddy or induced-current damping
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a transmission line vibration damper based on an eddy current energy consumption technology, which can effectively reduce vibration in a direction perpendicular to a transmission line, namely vibration in a least favorable load direction of a transmission tower structure under normal conditions, and can effectively improve the bearing capacity of a line iron tower; the energy consumption is carried out by adopting the eddy current technology, and the energy consumption efficiency is greatly improved by a method of adjusting the radius ratio of the gear, so that the vibration of the power transmission line can be effectively reduced; the damping parameters are adjusted by adjusting the magnetic field intensity of the permanent magnet and the distance between the copper sheet and the permanent magnet; the permanent magnet is adopted to provide a continuous magnetic field source, so that external energy is not needed, and a long-term stable vibration reduction effect can be generated; the magnetic flux leakage of the magnetic circuit can be effectively avoided by adopting the magnetic conductive material, so that the efficiency of eddy current damping is improved, and the influence on various surrounding components is avoided; reasonable design, simple structure and convenient installation and maintenance. Therefore, the invention is widely applied to the technical fields of power equipment and transmission line vibration reduction.
Description
Technical Field
The invention relates to the technical field of power equipment and transmission line vibration reduction, in particular to a transmission line vibration reduction device based on an eddy current energy consumption technology.
Background
With the gradual increase of electricity demand of a plurality of countries and regions internationally, the gear distance of the transmission line, the split number of the wires and the like are in an increasing trend, and the wind vibration hazard of the transmission line is also led to be serious. Vibration of the power transmission line under the action of wind load is not negligible, and damages such as broken lines, fatigue and strand breakage can be caused when the vibration is serious, so that safe operation of the power transmission line is greatly threatened. In order to reduce the damage to the transmission line caused by the vibration of the wires, effective measures must be taken to suppress the vibration of the wires. At present, the common practice is mainly to realize the aim of inhibiting the vibration of the lead by installing devices such as a damping spacer, a detuning pendulum, a damping spacer and the like, but the vibration reduction effect is limited. Therefore, the development of the vibration damper with reasonable design and obvious vibration damping effect is beneficial to the safe operation of the power transmission line and reduces the maintenance cost.
Disclosure of Invention
The invention aims to provide a transmission line vibration damper based on an eddy current energy consumption technology.
The technical scheme of the invention is as follows:
the utility model provides a transmission line vibration damper based on electric vortex power consumption technique, includes insulator chain 1, slider 2, guide arm 3, wire spring 4, gear a5, connecting rod a6, gear b7, gear c8, connecting rod b9, copper sheet 10, permanent magnet 11, steel sheet 12, bolt 13, apron 14, hollow body 15, ball 16 and slide hole 17;
the hollow body 15 and the cover plate 14 form a shell of the whole vibration damper, and are connected through bolts 13; the whole vibration damper consists of two energy consumption units which are symmetrically arranged; the two energy consumption units share the insulator chain 1 and the sliding block 2 and are bilaterally symmetrical;
the insulator string 1 passes through a sliding hole 17 in the center of the bottom of the hollow body 15, the upper end of the insulator string is connected with the sliding block 2, and the lower end of the insulator string is connected with a lead;
the sliding hole 17 is formed at the bottom of the hollow body 15 along the moving direction of the sliding block 2, and the size of the sliding hole is equal to the stroke of the sliding block 2;
the sliding block 2 is sleeved on the guide rod 3, the side surface of the sliding block 2 is provided with teeth, the sliding block 2 is not in direct contact with the device shell, and the rolling balls 16 are adopted for friction reduction treatment;
the two ends of the guide rod 3 are fixed on the shell, guide the displacement of the sliding block 2, and are sleeved with a wire spring 4; one end of the wire spring 4 is connected to the shell, and the other end is connected to the sliding block 2;
the gear a5 is meshed with the teeth on the side face of the sliding block 2, and the gear b7 is meshed with the gear c 8; the gear a5 and the gear b7 are rigidly connected with the connecting rod a6, and the gear c8 is rigidly connected with the connecting rod b 9;
the steel plate 12 and the shell form a closed cavity, the permanent magnets 11 and the copper sheets 10 are arranged in the closed cavity, the two permanent magnets 11 are respectively fixed at the top and the bottom of the closed cavity, and the copper sheets 10 are positioned between the two permanent magnets 11;
the connecting rod b9 passes through the closed cavity and sequentially passes through the permanent magnet 11, the copper sheet 10 and the permanent magnet 11, and two ends of the connecting rod are not in direct contact with the shell, and friction reduction treatment is carried out by adopting the balls 16; the copper sheet 10 is rigidly connected with the connecting rod b 9.
The radius of the gear b7 is larger than that of the gear c 8.
The balls 16 are spherical balls.
The sliding block 2, the guide rod 3, the wire spring 4, the gear a5, the connecting rod a6, the gear b7, the gear c8, the connecting rod b9, the steel sheet 12, the bolt 13, the cover plate 14, the hollow body 15 and the ball 16 are all made of magnetic conductive materials.
The working principle of the invention is as follows: when the transmission line vibrates in the direction perpendicular to the transmission line, the insulator string drives the sliding block to move, so that the gear a, the gear b, the gear c and the copper sheet are driven to rotate. As is known from lenz's law, a copper sheet is subjected to a force that inhibits its movement. The relative motion of the copper sheet and the magnetic field causes the electromotive force to be generated in the copper sheet, and the electric charge moves to form an electric vortex. These eddy currents are subjected to lorentz forces under the influence of the magnetic field and always have a direction opposite to the direction of movement of the copper sheet, so that a resistance, i.e. an eddy current damping force, is formed. At the same time, a part of the vibration energy will be converted into heat energy due to the thermal effect of the current, thereby playing a role in reducing the vibration. In particular, assuming that the distance the slider slides over is d, the radius of gear a is R a The radius of the gear b is R b The radius of the gear c is R c ，R b ＞R c The rotation angle of the copper sheet can be amplified, and the rotation angle is (d/R a )×(R b /R c ) The magnification is R b /R c That is, the larger the radius ratio of the gear b to the gear c is, the smaller the radius of the gear a is, and the higher the energy consumption efficiency is.
The invention has the beneficial effects that:
(1) The transmission line vibration damper based on the eddy current energy consumption technology can effectively reduce vibration in the direction perpendicular to the transmission line, namely vibration in the direction of the least favorable load of the transmission tower structure under normal conditions, and can effectively improve the bearing capacity of a line iron tower;
(2) According to the power transmission line vibration damper based on the eddy current energy consumption technology, the eddy current technology is adopted for energy consumption, and the energy consumption efficiency is greatly improved by a method of adjusting the radius ratio of the gear, so that the vibration of the power transmission line can be effectively reduced;
(3) According to the electric transmission line vibration damper based on the eddy current energy consumption technology, the damping parameters can be adjusted by adjusting the magnetic field intensity of the permanent magnet and the distance between the copper sheet and the permanent magnet;
(4) According to the transmission line vibration damper based on the eddy current energy consumption technology, the permanent magnet is adopted to provide a continuous magnetic field source, external energy is not needed, and a long-term stable vibration damping effect can be generated;
(5) According to the transmission line vibration damper based on the eddy current energy consumption technology, the magnetic conductive material is adopted, so that magnetic leakage of a magnetic circuit can be effectively avoided, the efficiency of eddy current damping is improved, and the influence on various surrounding components is avoided;
(6) The transmission line vibration damper based on the eddy current energy consumption technology has reasonable design, simple structure and convenient installation and maintenance.
Drawings
FIG. 1 is a cross-sectional view of a power transmission line vibration damping device based on an eddy current energy dissipation technology according to an embodiment of the present invention;
FIG. 2 is a B-B cross-sectional view of a vibration damping device for a power transmission line based on an eddy current energy dissipation technology according to an embodiment of the present invention;
fig. 3 is a schematic position diagram of a vibration damping device for a power transmission line based on an eddy current energy dissipation technology according to an embodiment of the present invention;
in the figure: 1 an insulator string; 2, a sliding block; 3, a guide rod; 4 wire springs; 5 gear a;6, connecting the rod a;7 gear b;8 gear c;9 connecting rod b;10 copper sheets; 11 permanent magnets; 12 steel plates; 13 bolts; 14 cover plates; 15 hollow bodies; 16 balls; 17 slide holes.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 3, an embodiment of a vibration damper for a power transmission line based on an eddy current energy consumption technology according to the present invention includes an insulator string 1, a slider 2, a guide rod 3, a wire spring 4, a gear a5, a connecting rod a6, a gear b7, a gear c8, a connecting rod b9, a copper sheet 10, a permanent magnet 11, a steel plate 12, a bolt 13, a cover plate 14, a hollow body 15, a ball 16, and a sliding hole 17.
The lead is hung on the insulator chain 1, and the insulator chain 1 is connected with the sliding block 2; when the wire vibrates under the action of wind, the insulator string 1 and the sliding block 2 are driven to displace along the direction of the guide rod 3, and after vibration, the sliding block 2 is reset under the action of the wire spring 4; the teeth on the side surface of the sliding block 2 are meshed with the gear a5, the movement of the sliding block 2 drives the gear a5 to rotate, the gear b7 is just connected with the connecting rod a6, and then the gear a5 and the gear b7 synchronously rotate; gear b7 is meshed with gear c8, and gear b7 rotates to drive gear c8 to rotate; the copper sheet 10 is just connected with the connecting rod b9, and then the copper sheet 10 and the gear c8 synchronously rotate; the copper sheet 10 rotates between the magnetic fields generated by the two permanent magnets 11 to generate electric vortex, and the radius of the gear b7 is larger than that of the gear c8, so that the rotation angle of the copper sheet 10 can be enlarged, and the electric vortex with larger intensity is generated, so that the damping efficiency is improved; the steel plate 12 is wrapped around the permanent magnet 11, and forms a closed cavity with the device shell, so that the magnetic conduction effect can be ensured, and the generation efficiency of the electric vortex can be improved; the connecting rod and the contact part of the sliding block 2 and the shell are provided with the balls 16, so that friction can be reduced; the hollow body 15 and the cover plate 14 form the outer shell of the whole device, and the hollow body and the cover plate are connected through bolts 13, so that the device is convenient to assemble and disassemble.
The transmission line vibration damper based on the eddy current energy consumption technology can effectively reduce vibration in the direction perpendicular to the transmission line, namely vibration in the direction of the least favorable load of the transmission tower structure under normal conditions, and can effectively improve the bearing capacity of a line iron tower; the energy consumption is carried out by adopting the eddy current technology, and the energy consumption efficiency is greatly improved by a method of adjusting the radius ratio of the gear, so that the vibration of the power transmission line can be effectively reduced; the damping parameters can be adjusted by adjusting the magnetic field intensity of the permanent magnet 11 and the distance between the copper sheet 10 and the permanent magnet 11; the permanent magnet 11 is adopted to provide a continuous magnetic field source, so that external energy is not needed, and a long-term stable vibration reduction effect can be generated; the magnetic conductive material is adopted, so that magnetic leakage of a magnetic circuit can be effectively avoided, the efficiency of eddy current damping is improved, and the influence on various surrounding components is avoided; the invention has reasonable design, simple structure and convenient installation and maintenance. Because wind load is born almost at any time on the power transmission line and earthquakes rarely occur, the application of the electric vortex energy consumption spacer is more important in the wind resistance problem of the power transmission line.
The invention is designed with care: firstly, the vibration in the direction perpendicular to the transmission line can be reduced, the vibration damping effect is not achieved along the transmission line, but the direction of the least favorable load of the transmission tower structure is the direction perpendicular to the transmission line under the normal condition, and the bearing capacity of the line iron tower can be effectively improved by controlling the vibration in the direction; secondly, the rigidity of the linear spring 4 is calculated according to the upper limit wind speed set by people, the wind load at the wind speed is N, the maximum stroke of the sliding block 17 is L, the number of springs is m, and the rigidity is lower than the lower limit k min The rigidity is equal to N/mL, the sliding block is easy to collide with the shell when the rigidity is smaller than the lower limit value, the durability is not facilitated, the rigidity is too large, the movement stroke is too small, and the energy consumption efficiency is low; third, the radius Rb of the gear b7 is larger than the radius Ra of the gear a5, so that the corner of the copper sheet 10 can be amplified, and the amplification factor is equal to Rb/Ra; fourth, lubricating oil is smeared on the gears, the balls 16 and the guide rods 3, so that the rotation friction is reduced.
The above-mentioned embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and all kinds of modifications, substitutions or alterations made to the above-mentioned structures of the present invention according to the above-mentioned general knowledge and conventional means of the art without departing from the basic technical ideas of the present invention shall fall within the scope of the present invention.
Claims (5)
1. The transmission line vibration damper based on the eddy current energy consumption technology is characterized by comprising an insulator string (1), a sliding block (2), a guide rod (3), a wire spring (4), a gear a (5), a connecting rod a (6), a gear b (7), a gear c (8), a connecting rod b (9), a copper sheet (10), a permanent magnet (11), a steel plate (12), a bolt (13), a cover plate (14), a hollow body (15), balls (16) and a slide hole (17);
the hollow body (15) and the cover plate (14) form a shell of the whole vibration damper, and are connected through bolts (13); the whole vibration damper consists of two energy consumption units which are symmetrically arranged; the two energy consumption units share the insulator chain (1) and the sliding block (2) and are bilaterally symmetrical;
the insulator string (1) passes through a sliding hole (17) in the center of the bottom of the hollow body (15), the upper end of the insulator string is connected with the sliding block (2), and the lower end of the insulator string is connected with a lead;
the sliding hole (17) is formed at the bottom of the hollow body (15) along the moving direction of the sliding block (2), and the size of the sliding hole is equal to the stroke of the sliding block (2);
the sliding block (2) is sleeved on the guide rod (3), the side surface of the sliding block (2) is provided with teeth, the sliding block (2) is not in direct contact with the device shell, and the rolling balls (16) are adopted for friction reduction treatment;
the two ends of the guide rod (3) are fixed on the shell, the guide rod guides the displacement of the sliding block (2), and a wire spring (4) is sleeved on the guide rod; one end of the wire spring (4) is connected to the shell, and the other end is connected to the sliding block (2);
the gear a (5) is meshed with the teeth on the side face of the sliding block (2), and the gear b (7) is meshed with the gear c (8); the gear a (5) and the gear b (7) are rigidly connected with the connecting rod a (6), and the gear c (8) is rigidly connected with the connecting rod b (9);
the steel plate (12) and the shell form a closed cavity, the permanent magnets (11) and the copper sheets (10) are arranged in the closed cavity, the two permanent magnets (11) are respectively fixed at the top and the bottom of the closed cavity, and the copper sheets (10) are positioned between the two permanent magnets (11);
the connecting rod b (9) passes through the closed cavity, sequentially passes through the permanent magnet (11), the copper sheet (10) and the permanent magnet (11), and does not directly contact with the shell at two ends, and adopts the ball (16) to carry out friction reduction treatment; the copper sheet (10) is rigidly connected with the connecting rod b (9).
2. The transmission line vibration damping device based on the eddy current energy consumption technology according to claim 1, wherein the radius of the gear b (7) is larger than the radius of the gear c (8).
3. The transmission line vibration damper based on the eddy current energy consumption technology according to claim 1 or 2, wherein the balls (16) are spherical balls.
4. The transmission line vibration damper based on the eddy current energy consumption technology according to claim 1 or 2, wherein the slider (2), the guide rod (3), the wire spring (4), the gear a (5), the connecting rod a (6), the gear b (7), the gear c (8), the connecting rod b (9), the steel plate (12), the bolt (13), the cover plate (14), the hollow body (15) and the ball (16) are all made of magnetic conductive materials.
5. The vibration damper for electric transmission lines based on the eddy current energy consumption technology according to claim 3, wherein the slider (2), the guide rod (3), the wire spring (4), the gear a (5), the connecting rod a (6), the gear b (7), the gear c (8), the connecting rod b (9), the steel plate (12), the bolt (13), the cover plate (14), the hollow body (15) and the ball (16) are all made of magnetic conductive materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910432863.9A CN110061468B (en) | 2019-05-23 | 2019-05-23 | Transmission line vibration damper based on eddy current energy consumption technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910432863.9A CN110061468B (en) | 2019-05-23 | 2019-05-23 | Transmission line vibration damper based on eddy current energy consumption technology |
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| CN110061468A CN110061468A (en) | 2019-07-26 |
| CN110061468B true CN110061468B (en) | 2023-11-24 |
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| CN114597842B (en) * | 2022-02-25 | 2023-05-12 | 山东大学 | Energy consumption adjustable wind deflection prevention device, insulator, power transmission tower and method |
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|---|---|---|---|---|
| US4200003A (en) * | 1976-03-29 | 1980-04-29 | Facet Enterprises, Inc. | Magnetic viscous damper |
| CN107268824A (en) * | 2017-08-14 | 2017-10-20 | 山东大学 | Multidimensional tunes electromagnetic energy-consumption vibration absorber |
| CN107339001A (en) * | 2017-07-03 | 2017-11-10 | 同济大学 | Gear type current vortex inertia damping device |
| CN108512177A (en) * | 2018-05-18 | 2018-09-07 | 云南电网有限责任公司电力科学研究院 | A kind of windage yaw angle control applied to suspension insulator |
| CN109599820A (en) * | 2018-11-02 | 2019-04-09 | 浙江大学 | A kind of anti-dance is reversed to current vortex mass damper and optimization method |
| CN109659889A (en) * | 2019-01-25 | 2019-04-19 | 大连理工大学 | A kind of current vortex energy consumption conductor spacer |
| CN209709635U (en) * | 2019-05-23 | 2019-11-29 | 大连理工大学 | A kind of transmission line of electricity vibration absorber based on current vortex energy consumption technology |
-
2019
- 2019-05-23 CN CN201910432863.9A patent/CN110061468B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200003A (en) * | 1976-03-29 | 1980-04-29 | Facet Enterprises, Inc. | Magnetic viscous damper |
| CN107339001A (en) * | 2017-07-03 | 2017-11-10 | 同济大学 | Gear type current vortex inertia damping device |
| CN107268824A (en) * | 2017-08-14 | 2017-10-20 | 山东大学 | Multidimensional tunes electromagnetic energy-consumption vibration absorber |
| CN108512177A (en) * | 2018-05-18 | 2018-09-07 | 云南电网有限责任公司电力科学研究院 | A kind of windage yaw angle control applied to suspension insulator |
| CN109599820A (en) * | 2018-11-02 | 2019-04-09 | 浙江大学 | A kind of anti-dance is reversed to current vortex mass damper and optimization method |
| CN109659889A (en) * | 2019-01-25 | 2019-04-19 | 大连理工大学 | A kind of current vortex energy consumption conductor spacer |
| CN209709635U (en) * | 2019-05-23 | 2019-11-29 | 大连理工大学 | A kind of transmission line of electricity vibration absorber based on current vortex energy consumption technology |
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| CN110061468A (en) | 2019-07-26 |
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