CN102564717B - Based on aerial condutor galloping test device and the test method of the excitation of shelves end movement - Google Patents
Based on aerial condutor galloping test device and the test method of the excitation of shelves end movement Download PDFInfo
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- CN102564717B CN102564717B CN201210021143.1A CN201210021143A CN102564717B CN 102564717 B CN102564717 B CN 102564717B CN 201210021143 A CN201210021143 A CN 201210021143A CN 102564717 B CN102564717 B CN 102564717B
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Abstract
The invention discloses a kind of aerial condutor galloping test device based on the excitation of shelves end movement and test method, belong to aerial condutor anti-dance technical field, its test unit comprises thread-laying device, lateral driver device, aerial condutor and insulator chain, thread-laying device is fixed on ground, the two ends of aerial condutor are connected with two thread-laying devices respectively by insulator chain, lateral driver device is connected with insulator chain, and test method is by determining that the steps such as measurement point, loading, record, analysis realize.The present invention coordinates aerial condutor by lateral driver device, the aerial condutor of simulating in reality be subject to along on aerial condutor direction shelves end movement excitation time wave situation, under studying different span, different excitation frequency and different excitation amplitude, rule waved by aerial condutor, compensate for the deficiency that tradition only carries out waving perpendicular to aerial condutor excitation wire, testing crew more can be fullyed understand, and mechanism waved by aerial condutor, thus propose anti-dance measure.
Description
Technical field
The present invention relates to a kind of aerial condutor and wave simulation test platform and test method, belong to aerial condutor anti-dance technical field, especially a kind of aerial condutor galloping test device based on the excitation of shelves end movement and test method.
Background technology
It is one of problem that harm is comparatively large, strick precaution is more difficult in technical field of electric power transmission that transmission line wire is waved.Transmission line galloping refer to produce at wind effect lower wire a kind of low frequency (being about 0.1-3Hz), large amplitude wire autovibration, peak swing can reach the 5-300 doubly left and right of diameter of wire.This motion can cause very large dynamic stress, and wire, gold utensil and shaft tower sometimes can be made to cause very large destruction.
In order to avoid conductor galloping, need conductor galloping mechanism, become dance condition, wave the aspects such as rule and further investigate.In the process of research, need to build aerial condutor test platform to simulate conductor galloping, in order to analyzing waving, that finds aerial condutor waves rule.
Under wind effect, wire swings on horizontal path direction, the insulator chain hanging wire point that it can be caused to connect produces the displacement along line direction, is equivalent to be applied with a shelves end movement excitation to adjacent shelves wire, will produce certain impact to waving of adjacent shelves aerial condutor.
At present, relate to having of aerial condutor galloping test platform a variety of, major part is all by reducing proportional for single grade of wire in reality, utilizes column to simulate steel tower, sets up wire between steel tower, instantaneous excitation is loaded by the test point at wire, make wire produce vibration to test, wherein instantaneous excitation mostly is vibrator realization, only can vibrate by analog conducting wire, can not be formed and wave, therefore can not carry out the research to conductor galloping mechanism.In addition, the excitation experiment porch of wire vertical loading only being considered to horizontal path method affects aerial condutor, and does not relate to along the impact of shelves end movement excitation on aerial condutor on line direction.
Be disclose a kind of galloping test machine in 2004201103810.0 in the patent No., this testing machine is utilize two cover crank connecting rod apparatus analog conducting wire ellipses to wave track completely, and that simulates that Great span aerial condutor produces after icing waves; The core technology of this galloping test machine is vibrator, the track ovalize of its xsect when vibrator makes conductor galloping, and oval major and minor axis has different changes with external environment difference, and the center line of major axis also can be different and produce deflection with external force.This testing machine utilizes mechanical drive to carry out waving of analog conducting wire, bears the ability of waving, but do not relate to conductor galloping Mechanism simulation for studying wire, can not carry out waving study mechanism.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of aerial condutor galloping test device based on the excitation of shelves end movement and test method, this device can be good at the excitation of simulation along aerial condutor direction to the impact of conductor galloping, and mechanism waved by research aerial condutor further.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of aerial condutor galloping test device based on the excitation of shelves end movement, comprise thread-laying device, lateral driver device, aerial condutor and insulator chain, described thread-laying device is fixed on ground, the two ends of described aerial condutor are connected with two thread-laying devices respectively by insulator chain, and described lateral driver device is connected with insulator chain.The present invention to provide the low-frequency excitation continued by a small margin in a horizontal direction acting on shelves end to the aerial condutor in thread-laying device by lateral driver device, the measurement point on aerial condutor is made to reach into dance condition, can study different span, different excitation frequency, different excitation amplitude to the impact of conductor galloping, mechanism waved by research aerial condutor further.
Further restriction is done to said structure, described lateral driver device comprises the push rod that can move horizontally, described push rod and fixed mount are slidably matched, the left end of push rod is contacted with eccentric wheel by dull and stereotyped, the outside of push rod is socketed with the spring resetted for push rod, one end of described spring and fixed mount interior side contacts, the other end contacts with described flat board, and described fixed mount is fixed by the support of base.Push rod in the present invention is connected with the lower end of insulator chain, by eccentric uniform rotation, the vibration of the end of push rod is made to be a simple harmonic oscillation, a sinusoidal Persistent Excitation can be had to wire, this sinusoidal excitation can make conductor galloping on the one hand, sinusoidal excitation is an energisation mode with remarkable rule on the other hand, and its excited frequency is single, the convenient research when subsequent treatment.
Do further restriction to said structure, described lateral driver device is the toggle be made up of connecting rod slider and swiveling wheel, or has the cylinder of double.Toggle in the present invention and cylinder also can realize excitation wire and wave, and study it and wave rule, but the vibration frequency complicated component that these two kinds of modes produce, therefore test effect is obvious not as eccentric wheel structure.
Do further restriction to said structure, described thread-laying device comprises the cross-arm of horizontal positioned, and the end of described cross-arm is provided with the hook be connected with insulator chain, and the middle part of cross-arm is fixed with the holder of vertical cross-arm.Holder in the present invention and cross-arm, for simulating the steel tower in reality, make this device more can reflect situation in reality, increase the accuracy of model configuration.
Further restriction is done to said structure, described thread-laying device arrange three and more than, be connected with insulator chain by aerial condutor between adjacent thread-laying device, form many grades of aerial condutor the present invention to connect to thread-laying device, can study in many grades of aerial condutors, multiple measurement point wave situation, fully can reflect and wave rule.
Based on the test method that the aerial condutor of shelves end movement excitation is waved, it is characterized in that the step of described test method is as follows:
(1), after described test unit is put up, span, the ratio of measurement bay hollow wire carry and sag;
(2) determine measurement point, settle high speed camera in the position of measurement point, and start high speed camera;
(3) determine load(ing) point, start lateral driver device, aerial condutor is carried out to the loading of shelves end transversal displacement excitation;
(4) load time is recorded, the vibration frequency of lateral driver device and vibration amplitude;
(5) extract high speed camera data, analytical test result, on drafting aerial condutor, measurement point waves track.
Preferably, described lateral driver device, the vibration frequency of its transversely excited is 0.1-20Hz, and Oscillation Amplitude is 1-20mm.Because conductor galloping is low-frequency vibration in the present invention, excited vibration frequency does not require too high, and general control is at 0.1-20Hz.The beneficial effect adopting technique scheme to produce is: the present invention coordinates aerial condutor by lateral driver device, the wire of simulating the erection of steel tower in reality is subject to along waving situation during excitation on aerial condutor direction, under studying different span, different vibration frequency and different vibration amplitude, rule waved by aerial condutor, compensate for the deficiency that tradition only carries out vertical drive conductor vibration, testing crew more can be fullyed understand, and mechanism waved by aerial condutor, thus propose innovative approach and avoid the generation of waving; Test method in the present invention proposes for this test unit, and this device is simple, easy to operate, and can be good at simulation aerial condutor and wave, and tests easy understand, easily grasp for those skilled in the art.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is structural representation of the present invention;
Fig. 2 is two grades of aerial condutor galloping test apparatus structure schematic diagram;
Fig. 3 is the another kind of embodiment of Fig. 2;
Fig. 4 is the lateral driver device schematic diagram of eccentric mechanism;
Fig. 5 is the lateral driver device schematic diagram of toggle;
Fig. 6 is the lateral driver device schematic diagram of double cylinder;
Wherein: 1, lateral driver device, 2, cross-arm, 3, holder, 4, aerial condutor, 5, insulator chain, 6, base, 7, eccentric wheel, 8, fixed mount, 9, spring, 10, push rod, 11, connecting rod, 12, slide block, 13, swiveling wheel, 14, air pump, 15, cylinder.
Embodiment
1 is known with reference to the accompanying drawings, the present invention is specifically related to a kind of aerial condutor galloping test device based on the excitation of shelves end movement and comprises thread-laying device, lateral driver device 1, aerial condutor 4 and insulator chain 5, thread-laying device is fixed on ground, the two ends of aerial condutor 4 are connected with two thread-laying devices respectively by insulator chain 5, lateral driver device 1 is connected with insulator chain 5, thread-laying device comprises the cross-arm 2 of horizontal positioned, the end of cross-arm 2 is provided with the hook be connected with insulator chain 5, the middle part of cross-arm 2 be fixed with the holder 3 of vertical cross-arm 2,
2 is known with reference to the accompanying drawings, and thread-laying device is arranged side by side three, is mounted with insulator chain 5, connected between adjacent thread-laying device by aerial condutor 4 in cross-arm 2 end of thread-laying device, forms two grades of wires.Can study aerial condutor 4 on measurement points different on two grades of wires based on this device and wave situation, summing up affects situation on steel tower in a circuit when many grades of aerial condutors are waved, and avoids because waving the harm brought from whole piece circuit.
In fig. 3, be arranged side by side three thread-laying devices, point of excitation mediates on the insulator chain of wire-binding device, also can set multiple exciting bank on many grades of circuits, analyze different point of excitation, and different excitation number is to conductor galloping situation.
Wherein accompanying drawing 4,5 and 6 is three kinds of different embodiments of lateral driver device 1, wherein accompanying drawing 4 is the lateral driver device of eccentric mechanism, comprise the push rod 10 that can move horizontally, push rod 10 and fixed mount 8 are slidably matched, the left end of push rod 10 is contacted with eccentric wheel 7 by dull and stereotyped, and the outside of push rod 10 is socketed with the spring 9 resetted for push rod 10, one end of spring 9 and fixed mount 8 interior side contacts, the other end contacts with described flat board, and fixed mount 8 is fixed by the support of base 6.Eccentric wheel 7 is driven by frequency modulation motor, makes it at the uniform velocity rotate, and drive push rod 10 tangential movement, wherein the end of push rod 10 is simple harmonic oscillation, and it gives the excitation of aerial condutor 4 one sine wave.
Accompanying drawing 5 is the lateral driver device of toggle, the swiveling wheel 13 that this device has frequency modulation motor to drive rotates, articulated linkage 11 is gone out on the border of swiveling wheel 13, other one section of slide block 12 being connected with trapped orbit of connecting rod 11, form toggle, slide block 12 drives aerial condutor 4 to vibrate, and measurement point is formed and waves.The vibration mode that in toggle, slide block 12 end exports is anharmonic vibration, and its oscillating curve is more complicated, and therefore its effect is not as eccentric mechanism.
The lateral driver device of accompanying drawing 6 double cylinder, this device drives the piston movement of cylinder 15 by air pump 14, and this structural vibration frequency is not easy to control, and frequency adjustment range is too little, and in use there is uncertain noise vibration.
Except above-mentioned three kinds of lateral driver devices, other can realize the mechanism of reciprocating horizontal motion, all can be applicable to the present invention, and realize the object that aerial condutor is waved, it all comprises within scope in the present invention.Base 6 can be set to adjustable for height device in addition, for adapting to the test platform of differing heights, to improve practicality of the present invention.
According to the above, summed up the aerial condutor test method of waving encouraged based on shelves end movement by device, its step is as follows:
(1), after described test unit is put up, span, the ratio of measurement bay hollow wire carry and sag;
(2) determine measurement point, 2-3 measurement point can be determined, settle high speed camera in the position of measurement point, and start high speed camera;
(3) determine load(ing) point, start lateral driver device 1, aerial condutor 4 is carried out to the loading of shelves end transversal displacement excitation, wherein require that the vibration frequency of the given transversely excited of lateral driver device 1 is 0.1-20Hz, Oscillation Amplitude is 1-20mm;
(4) record the load time, require the load time need meet from be loaded into and become time period after dance at aerial condutor 4 measurement point, then record the vibration frequency of lateral driver device 1 and vibration amplitude;
(5) extract high speed camera data, analytical test result, draw measurement point on aerial condutor 4 and wave track.
What the high speed camera in the present invention adopted is the RMC-6740GE model camera that JAT company of Denmark produces, and its sample frequency is 200Fps, can know and gather measurement point track, meet requirement of the present invention.
The present invention is tested by several times, track waved by the aerial condutor 4 measured under different span, different excitation frequency and different excitation amplitude, analyzes, draw out aerial condutor and wave track result, summing up each factor to waving influence degree, finding out the measure avoiding aerial condutor to wave.
Claims (5)
1. the aerial condutor galloping test device based on the excitation of shelves end movement, it is characterized in that: comprise thread-laying device, lateral driver device (1), aerial condutor (4) and insulator chain (5), described thread-laying device is fixed on ground, the two ends of described aerial condutor (4) are connected with two thread-laying devices respectively by insulator chain (5), and described lateral driver device (1) is connected with insulator chain (5);
Described lateral driver device (1) comprises the push rod (10) that can move horizontally, described push rod (10) and fixed mount (8) are slidably matched, the left end of push rod (10) is contacted with eccentric wheel (7) by dull and stereotyped, the outside of push rod (10) is socketed with the spring (9) resetted for push rod (10), one end of described spring (9) and fixed mount (8) interior side contacts, the other end contacts with described flat board, and described fixed mount (8) is fixed by the support of base (6); Eccentric wheel (7) is driven by frequency modulation motor, it is made at the uniform velocity to rotate, drive push rod (10) tangential movement, wherein the end of push rod (10) is simple harmonic oscillation, and it gives the excitation of aerial condutor (4) sine wave.
2. the aerial condutor galloping test device based on the excitation of shelves end movement according to claim 1, it is characterized in that described thread-laying device comprises the cross-arm (2) of horizontal positioned, the end of described cross-arm (2) is provided with the hook be connected with insulator chain (5), and the middle part of cross-arm (2) is fixed with the holder (3) of vertical cross-arm (2).
3. the aerial condutor galloping test device based on the excitation of shelves end movement according to claim 2, it is characterized in that: described thread-laying device arrange three and more than, be connected with insulator chain (5) by aerial condutor (4) between adjacent thread-laying device, form many grades of aerial condutors.
4., by the test method of the aerial condutor galloping test device based on the excitation of shelves end movement in claim 1-3 described in any one, it is characterized in that the step of described test method is as follows:
(1), after described test unit is put up, span, the ratio of measurement bay hollow wire (4) carry and sag;
(2) determine measurement point, settle high speed camera in the position of measurement point, and start high speed camera;
(3) determine load(ing) point, start lateral driver device (1), aerial condutor (4) is carried out to the loading of shelves end transversal displacement excitation;
(4) load time is recorded, the vibration frequency of lateral driver device (1) and vibration amplitude;
(5) extract high speed camera data, analytical test result, that draws the upper measurement point of aerial condutor (4) waves track.
5. test method according to claim 4, is characterized in that described lateral driver device, and the vibration frequency of its transversely excited is 0.1-20Hz, and Oscillation Amplitude is 1-20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210021143.1A CN102564717B (en) | 2012-01-13 | 2012-01-13 | Based on aerial condutor galloping test device and the test method of the excitation of shelves end movement |
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| CN201210021143.1A CN102564717B (en) | 2012-01-13 | 2012-01-13 | Based on aerial condutor galloping test device and the test method of the excitation of shelves end movement |
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| CN109000870B (en) * | 2018-09-21 | 2024-03-15 | 武汉大学 | Transmission line galloping electromagnetic excitation system and method |
| CN109406083B (en) * | 2018-11-08 | 2023-12-05 | 国网新疆电力有限公司电力科学研究院 | Suspension string hardware wind excitation vibration abrasion simulation test platform |
| CN109374249B (en) * | 2018-11-08 | 2023-12-26 | 国网浙江省电力有限公司电力科学研究院 | Wire clamp test platform for simulating random curve swing of wire under wind excitation |
| CN110160899A (en) * | 2019-05-31 | 2019-08-23 | 武汉大学 | A kind of device applying alternation tension to high-voltage conducting wires |
| CN113819950A (en) * | 2021-09-26 | 2021-12-21 | 通鼎互联信息股份有限公司 | Test equipment and test method for wind-induced vibration and galloping performance of optical cable |
| CN117917552B (en) * | 2024-03-18 | 2024-06-04 | 中铁电气化局集团有限公司 | Insulator state detection method for electrified railway |
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