CN202840431U - Pre-twisted wire type vibration-proof damper - Google Patents
Pre-twisted wire type vibration-proof damper Download PDFInfo
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- CN202840431U CN202840431U CN201220418824.7U CN201220418824U CN202840431U CN 202840431 U CN202840431 U CN 202840431U CN 201220418824 U CN201220418824 U CN 201220418824U CN 202840431 U CN202840431 U CN 202840431U
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- wire
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- hammerhead
- twisted wire
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Abstract
The utility model provides a pre-twisted wire type vibration-proof damper which can effectively reduce corona hearable noise and corona loss of a 330 kV high altitude region electric transmission line; compared with a normal dog-bone type vibration-proof damper with inconsistent hammerhead spherical sizes on two sides, the pre-twisted wire type vibration-proof damper possesses improved vibration-proof performance. The vibration-proof damper comprises a hammerhead, a stranded wire, a pre-twisted wire and a wire clamp fixedly pressed on the stranded wire; the hammerhead is of a dog-bone type structure; two ends of the hammerhead are of symmetrical spheres in a same size; the stranded wire is fixed to the hammerhead in a cold riveting mode. According to the utility model, hammerhead structure dimension is optimally designed and a curvature radius of a hammerhead surface is reasonably determined; the pre-twisted wire type vibration-proof damper guarantees good vibration-proof performance and meanwhile effectively raises anti-corona performance, thereby reducing corona noise and corona loss of a 330 kV electric transmission line vibration-proof damper in a high altitude region.
Description
Technical field
The utility model belongs to the vibration absorber field of overhead transmission line, is specifically related to a kind of pre-twisted wire type anti-vibration hammer.
Background technology
Western China is located in the plateau, for the planning of west area geographical features and energy development thereof, the demand of electric power is increased day by day.Yet along with the increase of height above sea level, high height above sea level corona problem is very outstanding, and the corona effects such as corona loss that cause of corona discharge, can affect the safety and economic operation of transmission line.Therefore, the problem of the anticorona discharge of power transmission line in high altitude region and corona noise is very necessary.
Corona is because rough conductor produces inhomogeneous electric field, when voltage is elevated to certain value, at the little position of non-uniform electric field mean curvature radius, will discharge when its surface field intensity surpasses the breakdown strength of air molecule, forms corona.Corona is wanted consumed energy, and the pulse electromagnetic wave that corona discharge produces can produce interference to radio and HF communication; Also can make the conductive surface corrosion, thereby reduce the useful life of conductor.At present, the electromagnetic environment problem has become power transmission line in high altitude region design, construction and the key factor that must consider in service.
Corona noise is by conductor partial discharge or corona and produce, height and the transmission line height above sea level of living in of it and electric pressure are closely related, and electric pressure is high, and electrical wiring is complicated, then the local field strength on energized conductor surface is higher, and partial discharge or corona more easily occur; The gold utensil in the higher area of height above sea level, corona discharge more easily appears in its surface.
The design of charged gold utensil is relevant with its surface work field intensity with applicable elements, and the work field intensity is higher than the bloom field intensity when the surface, will produce corona discharge on the gold utensil surface.Size and the hardware fitting structure of gold utensil work field intensity are closely related, studies show that the position that gold utensil surface curvature radius is less, under identical voltage effect, its surface work field intensity is higher, and corona discharge more easily appears in this place, thereby produce corona noise and electric energy loss, be unfavorable for energy-conserving and environment-protective.
According to a large amount of 330kV transmission line electromagnetic environment field measurements are found, conventional stockbridge damper corona discharge phenomenon in height above sea level is 1000 ~ 4000m scope is more outstanding, the bloom position of stockbridge damper mainly concentrates on the tup two end portions, and along with the increase of height above sea level, its strength of discharge and corona noise increase thereupon.
Present method for high altitude localities control corona is mainly by special construction design and realizes, for example application number is CN200910025011.4, denomination of invention is the application for a patent for invention of " anti-vibration hammer for high-voltage power transmission lines ", relate to a kind of anti-vibration hammer for high-voltage power transmission lines that the power industry electric line is used, formed by wire clamp, hammer body, steel strand wire, at least one preformed armor rods, wire clamp is fixedly mounted with steel strand wire and is connected, and described wire clamp is hippocampus shape version; Hammer body is dumbbell shaped version, two symmetrical two ends that tilt to be packed in steel strand wire of hammer body; The circular arc smooth treatment has been carried out on the hammer body surface; The problem of its solution is to absorb the different frequency vibration, has prolonged the useful life of circuit; Effectiveness in vibration suppression is better, has improved corona voltage, has reduced point discharge, has improved whole performance, has reduced pollution flashover.The tup of dumbbell shaped, the large end of tup one end is little, causes the radius of curvature of tup to differ increasing, and this can cause surpassing high altitude localities gold utensil surface work limit of electric field strength than hand hammer head surface maximum field strength, corona discharge occurs.
And for example application number is CN200910025013.3, denomination of invention is the application for a patent for invention of " 1000kV ultrahigh voltage alternating current transmission lines stockbridge damper ", relate to the stockbridge damper that power industry electric line 1000kV ultra-high voltage AC transmission is used, formed by wire clamp, hammer body, steel strand wire, at least one preformed armor rods, wire clamp is fixedly mounted with steel strand wire and is connected, two hammer bodies are packed in respectively the two ends of steel strand wire, preformed armor rods is fixed on wire clamp on the power transmission line, wire clamp is hippocampus shape structure, and hammer body is kirsite calabash shaped structure hammer body; Being connected between the windward side of cantilever end tup and the tup is designed to circular-arc, and with arc size control within the specific limits, thereby avoided point discharge.This patent is the same with the situation of above-mentioned patent, calabash shaped structure hammer body, can make than the maximum field strength of hand hammer head surface greater than the maximum field strength than the sledgehammer surface, cause the discharge inception voltage of stockbridge damper integral body to reduce.
Above-mentioned technology mainly is the improvement of hardware fitting structure, and its improvement effect is limited.
Application number is 200610048911.7, and denomination of invention is a kind of patent of invention of energy-saving vibration prevention hammer, and its improvement is that the wire clamp body adopts the austenitic nonmagnetic steel material, because wire clamp body material adopts nonmagnetic steel, has cut off magnetic loop, eliminates or has reduced electric energy loss.But this stockbridge damper only is an improvement to the electromagnetic consumable aspect, does not relate to anti-corona performance and the vibrationproof performance of stockbridge damper.
In sum, research and develop the anti-corona well behaved stockbridge damper in a high altitude localities, will play progradation to the construction of power transmission line in high altitude region.
Summary of the invention
It is a kind of for the high altitude localities pre-twisted wire type anti-vibration hammer that the purpose of this utility model is to provide, this anti-vibration hammer is the dog bone type structure, the sphere size design of tup end, both sides is identical, through optimal design, tup both side ends spheroid radius of curvature is reasonable in design, its application can effectively reduce corona audible noise and the corona loss of 330kV power transmission line in high altitude region, and compares with the inconsistent dog bone type stockbridge damper of both sides tup sphere size of routine, and its vibrationproof performance also makes moderate progress.
For achieving the above object, the technical scheme taked of the utility model is:
A kind of pre-twisted wire type anti-vibration hammer, described stockbridge damper comprise tup, steel strand wire, preformed armor rods and press solidly wire clamp on described steel strand wire; Its improvements are:
The two ends of described tup are symmetrical arranged measure-alike sphere, and the spheroid of described tup one end is provided with the steel strand wire installing hole, and the surface of described tup is seamlessly transitting between the cambered surface;
Described steel strand wire are fixed on the described tup with the riveting method of colding pressing;
Described wire clamp is arranged at the center of described steel strand wire.
Another optimal technical scheme of the present invention is: described hammer head material is cast Zn-Al alloy.
Another optimal technical scheme of the present invention is: described wire clamp presses solidly the center in described steel strand wire.
Another optimal technical scheme of the present invention is: described preformed armor rods cross section is for circular.
Another optimal technical scheme of the present invention is: the end, two ends of described preformed armor rods is smooth hemisphere.
Another optimal technical scheme of the present invention is: described tup centered by described wire clamp, about be the splayed configuration structure.
Owing to having adopted technique scheme, compared with prior art, the beneficial effects of the utility model comprise:
1) anti-corona performance
Conventional Pre-Cutter-Type Anti-Vibration Hammer is under the 330kV rated voltage, through simulation calculation, outside hand hammer head surface maximum field strength has reached 30kV/cm, far surpasses high altitude localities gold utensil surface work limit of electric field strength, corona phenomenon will inevitably occur, can not directly use in the high altitude localities.
The utility model Pre-Cutter-Type Anti-Vibration Hammer has passed through structural improvement, increased the radius of curvature of weak spot, namely increase the radius of little tup, being smoothly connected of a plurality of cambered surfaces adopted in the connection between while two tups, thereby greatly improved the anti-corona performance of stockbridge damper.The Pre-Cutter-Type Anti-Vibration Hammer of this structure is through simulation calculation, and surperficial maximum field strength has been reduced to 24kV/cm.The result surface of corona test, under 4000 meters height above sea level conditions of simulation, the discharge inception voltage of stockbridge damper is 410kV, far above the rating operating voltage of 330kV, has effectively suppressed the generation of corona, has realized the purpose of energy-conserving and environment-protective.
2) vibrationproof performance
The Pre-Cutter-Type Anti-Vibration Hammer of this structure is compared with conventional Pre-Cutter-Type Anti-Vibration Hammer, and the stockbridge damper gross mass is larger a little; Power characteristic result of the test from a plurality of stockbridge dampers of same type, conventional Pre-Cutter-Type Anti-Vibration Hammer only has three resonance frequencys usually, the 3rd frequency is generally about 87.6Hz, and the power difference between each stockbridge damper on this frequency is larger, have larger discreteness, be much higher than the frequency range of the aeolian vibration of its adaptive wire, i.e. the resonance frequency of conventional Pre-Cutter-Type Anti-Vibration Hammer distribution is reasonable not, peak-to-valley ratio is larger (greater than 5) also, not exclusively satisfy standard-required.The Pre-Cutter-Type Anti-Vibration Hammer of this structure has four resonance frequencys, and frequency distribution is more reasonable, and the 4th frequency is in the frequency range of aeolian vibration fully about 50Hz, and peak-to-valley ratio also satisfies standard-required (less than 5) fully.This shows, the more conventional Pre-Cutter-Type Anti-Vibration Hammer of Pre-Cutter-Type Anti-Vibration Hammer vibrationproof performance of the utility model structure is more good.
3) the utility model stockbridge damper is applicable to 4000 meters of height above sea level and following area.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the stockbridge damper structural representation;
Fig. 2 is the hammehead structure schematic diagram;
Fig. 3 is the top-twisted wire-clip front view;
Fig. 4 is the top-twisted wire-clip end view;
Fig. 5 is the preformed armor rods structural representation;
Reference numeral:
The 1-tup, 2-steel strand wire, 3-wire clamp, 4-preformed armor rods.
Embodiment
Below in conjunction with example the utility model is described in detail.
The utility model is same size by the structural shape of appropriate design tup with each side tup end ball design.Through this design, optimize the radius of curvature of tup end, improve the tup surface electric field distribution, thereby prevent that effectively the tup two ends from producing corona loss and corona noise in the 330kV transmission line of the following high altitude localities of 4000m, reach the purpose of energy-conserving and environment-protective; Simultaneously the number of the resonance frequency of stockbridge damper is increased to some extent, improve its vibrationproof performance.
Stockbridge damper is comprised of four parts: tup 1, steel strand wire 2, top-twisted wire-clip 3 and preformed armor rods 4.As shown in Figure 1.
Tup 1 is the dog bone type structure, and two ends are symmetrical arranged measure-alike sphere, and whole hammer head material is cast Zn-Al alloy, and the surface is seamlessly transitting between the cambered surface, without casting flaw.See accompanying drawing 2.
Steel strand wire 2 are fixed on the tup with the riveting method of colding pressing usually.
Top-twisted wire-clip 3 adopts the Birmasil manufacturing, and each cambered surface of surface seamlessly transits, and without casting flaw, flawless when pressing solidly with steel strand wire is seen shown in accompanying drawing 3 and the accompanying drawing 4.
Preformed armor rods 4 ends are that smooth semicircle is spherical, and material is aluminium alloy, any surface finish, flawless, the defective such as folding and scab.See accompanying drawing 5.As shown in Figure 5, the length of preformed armor rods is L ˊ, and the diameter of preformed armor rods is d, and each dimensional parameters of preformed armor rods and the situation of applicable wire diameter are as shown in table 1.
Table 1 preformed armor rods size and applicable wire diameter
| Figure number | Model | Applicable wire diameter/mm | D/mm | d/mm | Lˊ/mm | Pitch | Every group of radical | Weight/kg |
| 2009224-2-1 | FYH-24 | 27.63 | 23.0 | 6.3 | 1090 | 260 | 3 | 0.62 |
| 2009224-2-2 | FYH-25 | 28.00 | 23.2 | 6.3 | 1090 | 265 | 3 | 0.62 |
| 2009224-2-3 | FYH-26 | 29.14 | 24.8 | 6.3 | 1125 | 270 | 3 | 0.66 |
| 2009224-2-4 | FYH-27 | 30.00 | 24.9 | 6.3 | 1125 | 280 | 3 | 0.66 |
This anti-vibration hammer 1 is the dog bone type structure, through optimal design, tup 1 both side ends spheroid radius of curvature is reasonable in design, lighter weight, its application can effectively reduce corona audible noise and the corona loss of 330kV power transmission line in high altitude region, and compare with the dog bone type stockbridge damper of routine, its vibrationproof performance also makes moderate progress.
The utility model stockbridge damper has obtained very large improvement in anti-corona performance, is applicable to 4000 meters of height above sea level and following area, and its vibrationproof performance has also obtained improvement to a certain degree simultaneously.
According to specific exemplary embodiment the utility model is described herein.To carry out suitable replacement under the scope of the present utility model or revise will be apparent not breaking away to one skilled in the art.Exemplary embodiment only is illustrative, rather than to the restriction of scope of the present utility model, scope of the present utility model is by appended claim definition.
Claims (6)
1. pre-twisted wire type anti-vibration hammer, described stockbridge damper comprise tup (1), steel strand wire (2), preformed armor rods (4) and press solidly wire clamp (3) on described steel strand wire (2); It is characterized in that:
The two ends of described tup (1) are symmetrical arranged measure-alike sphere, and the spheroid of described tup (1) one end is provided with steel strand wire (2) installing hole, and the surface of described tup (1) is seamlessly transitting between the cambered surface;
Described steel strand wire (2) are fixed on the described tup (1) with the riveting method of colding pressing;
Described wire clamp (3) is arranged at the center of described steel strand wire (2).
2. a kind of pre-twisted wire type anti-vibration hammer as claimed in claim 1 is characterized in that described tup (1) material is cast Zn-Al alloy.
3. a kind of pre-twisted wire type anti-vibration hammer as claimed in claim 1 is characterized in that described wire clamp (3) presses solidly in the center of described steel strand wire (2).
4. a kind of pre-twisted wire type anti-vibration hammer as claimed in claim 1 is characterized in that described preformed armor rods (4) cross section is for circular.
5. a kind of pre-twisted wire type anti-vibration hammer as claimed in claim 1, the end, two ends that it is characterized in that described preformed armor rods (4) is smooth hemisphere.
6. a kind of pre-twisted wire type anti-vibration hammer as claimed in claim 1 is characterized in that described tup centered by described wire clamp (3), about be the splayed configuration structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220418824.7U CN202840431U (en) | 2012-08-22 | 2012-08-22 | Pre-twisted wire type vibration-proof damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220418824.7U CN202840431U (en) | 2012-08-22 | 2012-08-22 | Pre-twisted wire type vibration-proof damper |
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| Publication Number | Publication Date |
|---|---|
| CN202840431U true CN202840431U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220418824.7U Expired - Lifetime CN202840431U (en) | 2012-08-22 | 2012-08-22 | Pre-twisted wire type vibration-proof damper |
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| Country | Link |
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| CN (1) | CN202840431U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2533657C1 (en) * | 2013-06-26 | 2014-11-20 | Закрытое Акционерное Общество "Мзва" | Vibration damper |
| RU2763582C1 (en) * | 2021-04-20 | 2021-12-30 | Общество С Ограниченной Ответственностью "Мзва" | Vibration dampener to protect overhead lines |
-
2012
- 2012-08-22 CN CN201220418824.7U patent/CN202840431U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2533657C1 (en) * | 2013-06-26 | 2014-11-20 | Закрытое Акционерное Общество "Мзва" | Vibration damper |
| RU2763582C1 (en) * | 2021-04-20 | 2021-12-30 | Общество С Ограниченной Ответственностью "Мзва" | Vibration dampener to protect overhead lines |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |