DE7400561U - Aerodynamic damper of dancing a pipe - Google Patents

Description

Djpl .. | " _B. Or _jlir .

Frank Arnold Nix

Piiten'anw.! Ι Frankfort am Main 70

Gartenstralie 123 t ~

Ai-KODiWALJSGhER DAkU ³ V ^ DES DANZEiNb ONE

LSlTUWG

The voriie _b Enue invention relates dip Starkstroiafreilei, insDesonciere iinrichtungen for damping of dancing ätaricsi / rojnireileitungeri and concretely an a * \ rodj'namiscaea damper ues i'anzens an overhead power line.

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xiexianntlich low-frequency among the dancing lines Seismic vibrations of the lines with a large Aiplituae Dei one or two halves per span Verstanae.1, aie after iterative effects for an electrical energy transmission line pose the greatest danger. The lancing of the lines occurs in certain atmospheres Conditions that result in unilateral ice formation

the! lines, a wind pressure au £ dicäo at one speed from 5 to 18 m / sec.

The dancing of the lines is for the electric power transmission lines very dangerous and leads in the Hegel to considerable damage to these lines and possibly to their destruction. In connection with this, a great deal of attention has been paid in recent years Provision in the field of damping methods for the Dancing the lines and means of realizing these practices on both emerging and im Microenergy transmission situations in operation given. Here, the measures to combat the dancing of the lines and the formation of ice are the cause divided as follows:

1) Finding various preventive measures for that Ice formation on the lines and pipeline routes as well as in accordance with procedures to reduce the dangerous effects of the Dancing the wires;

2) Development of new and improvement of known means for actively combating these phenomena.

The first group of measures includes: - Various known methods of melting the Ice curtains on the conductors and conductor ropes both by means of an alternating current as well as a direct current with disconnection of the lines or by superimposing the

Alternating current with a direct current component. These procedures produce a positive effect in a number of cases, but require a great deal of effort and large investments, which is only for large energy supply systems located in areas with intensive ice formation is justified, which is why it is not widely used have found.

- Prophylactic heating of pipes by currents that prevent ice formation on the former. These

■ Method gives a very good effect, but is only in

Various energy supply systems can be used where it is possible to transfer loads from one line to the other and maintain these loads at such a level that the current value in the lines enables them to be heated to +2 to +5 ⁰ C and does not cause excessive heating and overheating of the lines, mainly in contact connections;

- Use of special cables made from one material with the Curie point in a range from 0 ° to 10 C and with a conductivity above 0.005 · 10 S / cm ^, the heat due to magnetic reversal losses developed, application of various types of couplings, tapes or sleeves, which are mounted on aen! lines and made of alloy -

rungs with high specific resistance and erratic Increase in magnetic permeability with temperature

\ from C ⁰ C were hergesbellt, which leads to a düii

Curie-JPunict corresponding leuipex ^ atur iüiir ν ♦ such Facilities are, tew-er and can exceptionally

1 individual transitions of the lines over difficult-to-pass

■ i bitre natural obstacles are used;

• Various methods of mechanical sanctification

the lines from the ice curtain or the use of special

; Fillings and coatings for the lines, but as a result

'Low effectiveness, no practical use found

; to have.

'. - Likewise well-known Voriuarer »for the removal of a

j Collapse of lines when they dance by means of = -

ι increase the distances between aen lines, especially for ^ r-

i weighting of masts, the transfer of Doppeleitun ^ eii at

Icing on a farm in the evacuation of a large one

J triangle, where out of 6 lines in operation only .5 lines

! stay, leads, as well as anaere similar3.icu.e i..aßscar that

■ due to a reduction in ÖKonoiaiscaer nominal values aer i '; 3ni: -

j tro energy transfer no wide useiii-: found

; hubs.

The second group of precautions includes: 1 - Disturbance of the oscillation mechanism of lines

j in a span by Linwiricung on this special

; Facilities aie aie anox between the ladders

in the tension field of rigid or firing isoliei'encLeii

stancishaluern vorseaen. Similar procedures for disrupting the The swing mechanism of cables ropes the suspension on the lines of various vibration dampers for the lines in front, ax themselves from ventilation systems and Inertia masses ocier the lines encompassing, elastic Assemble flexible couplings that dissipate energy contribute to other vibrations. The facilities based on the procedures listed are heavy realizable, have an increase in wind loads of aea cables on the masts are manufacturing technology complicated, oversized and expensive, which is why they have not found wide use.

- to a method for increasing the üiergieaufwanues for the friction in line vibrations is known, which provides for the production of lines of special construction with an air gap between the inner layers of conductor cables, oei aenen due to a magnification of ueibungskräften and a i'requenz & SA differential in natural oscillations! the outer courtyard conductor and the core suppress the vibrations when the lines are dancing. The damping methods for dancing are not very effective due to a relatively small loss of mechanical energy for the friction and a slight oscillation frequency difference. At the same time, the manufacture of wire ropes requires the-

like construction additional costs that make the energy transmission line considerably more expensive as a whole. - It is a device for damping the satchel of the lines known, which is arranged on the conductors in aen tension fields of the line and on the damping of torsional vibrations of the line caused by a flywheel builds up with springs. The complexity of the manufacture and assembly of the device as well as an inadequate de effectiveness of the damping of the torsional vibrations, which are not in the initial stage α exdevelopment of dancing, but already after its development, have no way to a wide application of this device Worn.

a number of facilities are also known,

which belong to the second group of measures / on one Disturbance of the vibration mechanism based on the line in the vicinity of the masts.

For example, it is recommended that the loads on the section one on the line with the help of suspensions at a certain distance on both sides of the fastening point a supporting chain of insulators attached to the rope hang up. It is assumed that the load distribution from the weight of the load to several points along the section in the adjoining tension fields the development will prevent intense line vibrations. Ee wurae

proposed the mechanical coupling between aen ladders aer ang renzenden Spannielder on both sides of the attachment points of the ladder "on the supporting isolator chains using different types of dampers or without them in order to prevent longitudinal vibrations of the lines, the insulators on which they are suspended, as well as for the action of the adjoining Tension field to the original ^ movement, changing its type and in the case of partial

[· 'Would take the vibrational energy to materialize.

It is a means of dampening the dancing of the lines In the bounding tension fields with different intensities of these oscillations known that a pendulum the insulators along the line cause the dur ^ h. the Displacement of a hollow cylinder filled with sand along a curved rail is damped. With all positive ones Properties of this group of devices make them very complicated and technically expensive constructions In addition, the existing flexibility of the attachment of the isolators to the mast brackets contributes in one way or another to move damping devices along with the conductors attached to them the line, whereby the vibration damping effect on the lines is weakened and an overflow the vibration energy from clamping field to clamping field that maintains the self-oscillation of the lines.

Other similar devices are also known. In the case of -from the inside, it is suggested to use feathers Damping devices on rope connecting webs between several distant iunxtexi aer lines in α en adjoining spanning elements in the vicinity of load-bearing masts assemble, wooei the dampers in turn using insulating parts at the j ^ ons trüget ion des ji-iastes are defied, while some displacement of the conductor along the line Swivel lever of the damping device is reached ..

In the case of the other - will be the aas l'anzen of the lines suppressive damping of the longitudinal displacement on the suspension clamps by installing a liquid or air damper between a hanging clamp and an immovable one, on the mast with hixi'e two horizontally lying rigid ones insulating spacer attached part provided. In order to guarantee a slight postponement aes The conductor in the axial direction of the line is immovable in aem Part on which the Da 'pier is fastened, a longitudinal groove vox 'seen. In both cases there were vertical lines Loads absorbed by the insulator chain.

The common disadvantage of the devices mentioned is their complexity and their relatively large size Manufacturing costs of the damping devices as well an extremely limited possibility of horizontal

Movement of the conductor along the line, which makes it difficult the iiOastruütion ues wastes to iOlge, the door one eraeblxcae difference in the ladder run without uneven dropping As for the ice curtain from the ladder, it was perfect for you one-sided ladder run in the emergency room (in the event of a ladder break in the adjacent tension dress) who must be laid out. After all, to diminish the dancing is the Lines ax exploitation of aerodynamic dampers of the aer lines (aercaynaiaiBcueu stabilizers) loading

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for example, an aerodynamic damper is the Dancing's α ex line of the English type (USA patent I <ro ^ öo20fa) ueicannt, aer aas a plastic plate special profile CT-formifejen cross-section) with four oCixlitzeix is composed of four aluminum mounting brackets, ax for fastening aer said plate on the conductor are provided.

..acöeilig is aerodynamic dampers of the aieseia Dancing aer i-eitan ^ uie utilization of an iietall (aluminum) for the first-mentioned aai ladder, aas lack of sicii selost Dexestigenuen elements, an enlargement of aorona losses and eunk disorders, a great work intensity aer assembly of these aerodynamic dampers of the i'anzens aer line on the head. In addition, will be in the course the inner surface of a mounting bracket under the

Influence of mechanical influences aiii 'tier geö & iiiitäu aerodynamic Damper of the dancing line worn out and. a game is formed that causes the plate to slide towards the center of the conductor slack and to pivot it under the effect of the buoyancy of the air flow, i.e. to the Creation of aerodynamically unfavorable conditions for the vibration damper, all of which contribute to the reinforcement of the dancing air.

The purpose of the present invention is to provide a straightforward aerodynamic damper of the Tanzess line to create that is simply and reliably attached to the conductor and does not increase corona losses and Causes radio interference.

The invention is based on the object of a simple Damper from dancing the line only from an insulating material without creating metallic fasteners, with this aerodynamic damper aes dancing the leitsag should be carried out in such a way that ate self-attachment when mounting on the ladder, the lower the ambient temperature, the better the security, especially if the conditions favor the formation of ice on the ladder.

This is achieved in that with an aerodynamic Damper aes dancing the conductor of an overhead power line, an elongated plastic plate and a

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lileaent 2 for the amusement of this elongated ii on said conductor contains said fastening element made of plastic according to the invention in the form of a half-sleeve uniformly with the aforementioned elongated plastic plate with an a opposite the outer diameter aes th conductor by the value of an oversize smaller diameter αer Innentläcne is executed, said Fastening element in relation to the aforementioned elongated

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Plastic plate is arranged in such a way that its original

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witness lines along the above-mentioned inferior wall is directed.

It is expedient to carry out the dance of the line in the manner ₀ aerodynamic damper that the elongated plastic plate in the plane referred to by the geometric longitudinal axis de3, in ü'orm a HaIbbüchse fastener executed it goes, is located on one side thereof.

It is also useful to perform the aerodynamic damper of dancing αer line such that the elongated plastic plate lies in the plane, aie through the geometric longitudinal axis of said, in the form a half-sleeve executed fastening element, with one part of said elongated plastic plate on the one hand of said fastening element and the other part thereof, on the other hand, of said fastening element is located.

The Yorli ""; find.e aer ^ .- namieche Däi "piei"aes'i'anzens eier line is simple in construction and. Manufacture; It is easy to assemble on the ladder, whereby it attaches itself and secures itself reliably in any position, in general because it has been arranged. Line experimental i-Tüfung on the transmission line ^ trek ergaD positive results by showing that aurch derarti _& e aerodynamic damping a wesentlicue ochwächun ^ · is erreicat aer line vibrations.

Since the present aerodynamic campers ues Tanzeiis eier line ^ have a metallic element * !, their installation on the conductor does not lead to any coronation of corona losses and x '* disturbances in uen high and extra-high voltage surges ^ transmission lines.

A detailed description is given below; one concrete execution of a

inventive aerod ^ namiscnen Däiapxer-s aes dance ens aes Conductor of an electrical transmission line, accompanied by drawings. üs shows:

1 shows a known aerod ^ 'naaiiscneri damping ex · aes 'Dancing the lead of elongated type in side view; i'ig.2 the same in the section along the line II-II

3 shows an xsef mounting bracket in side view; 4 the same in a front view; Fig. 5 shows the conting process on the head of a loading

Belted aerodynamic damper aes xanzens aer line iia initial stage;

Fig. 6 aass the same in. Intermediate stage; i'i.g.7 the same in the terminal stage;

Ji'ig-8 an aerodynamic damper according to the invention des xanzens de & head of an energy transmission line, in eggs the elongated .Kunststoffplatte on the one hand of the fastening element it lies;

FIG. 9 the same in section along the line IX-IX of FIG. 8;

10 shows an aerodynamic damper according to the invention of the dancing line in perspective, at aem the elongated plastic plate on one side of the fastening i ng s element lies;

11 shows an aerodynamic damper according to the invention the i'anzens the line including aem line piece, at to which the x'eile of the elongated ivuns st off ρ latte on both sides are arranged by the i-mounting element; 12 the same in cross section;

Fig. Vf) uie Ciuersichniütsform an aerodynamic damper according to the invention ues Γanζens the line, in which the on the other side of the joex st igung β element arranged χ Ie of the longitudinal Suns X st offp latte have the same dimensions;

Fig. 14 aie ^ initial shape of an inventive aerodynamic damper aes Tanζens the line, in which

the parts of the elongated plastic plate arranged on both sides of the fastening element have different height dimensions exhibit;

FIG. 15 shows one according to the invention shown in FIGS. 11 to 14 aerodynamic damper of dancing line in perspective.

To better understand the essence of the invention

starting point

becomes for the time being the known aerodynamic one, regarded as ν Damper of dancing lead is considered of the elongated type.

It represents an elongated plate 1 (Fig.1, 2) T-shaped cross-section with four slots 2 (in Fig. A only half of the plate is indicated with two slots 2). The upper part 5 of this plate 2 is expanded and its on the conductor 5 adjacent section 4 is given a round shape with a radius of curvature corresponding to the radius of the conductor 5.

The fastening element represents aluminum plates 6 (Fig.J ₁ 4), each of which is inserted through a corresponding slot 2 in the process of fastening said elongated plate 1 of T-shaped cross-section.

The sequence of operations for fastening said plate 1 of T-shaped cross-section is shown in FIGS. 5, 6 and 7 reproduced.

The present aerodynamic damper of dancing

the line of an overhead power line is a plastic construction special profile, which is an elongated plastic plate 7 (Fig.b to 10) and one with the named plastic plate uniformly designed fastening element from the same art keeps open.

This fastener represents a half sleeve represents, in which the diameter of the inner surface is smaller than the diameter of said conductor 9 by the value of the Excess is. This enables the present aerodynamic damper of dancing the line to self-attach on a bare conductor on which it is placed. As can be seen from the drawings listed (Fig. 8 to 10), this half-sleeve is arranged along the elongated Kaüsstoffplatte with which it forms a unit . It is evident that the generatrix is the inner surface the said half-sleeve is also directed along the ge called elongated plastic plate.

The self-fastening of the present aerodynamic The damper of the dancing line is by means of shoulders 10 with an outer diameter of the to be encompassed Conductor of the otark power line corresponding inside radius r taking into account the shrinkage of the material used and the required oversize guaranteed. The angle <> l can, within wide limits can be varied, with the optimal angle for the widely used

used wires with a diameter of 24- and pC mm a loop angle of about 270 applies.

Spreading of the shoulders uia axe ureide des Ladder to put on aes bescurieoenen aercäyüaiaisehen the shock absorber gets on the wires thanks to its elasticity the former on the basis of the selection of a corresponding one Material (polyethylene, etc.).

The modification / on the wire of the present aerodynamic iron üchwingungsdäDipxer ^ i ex 'followed by a simple manual spreading on opposite sides of the Shoulders 10 with the former touching down afterwards on the wire.

In the other variant, the device-technical version "is aerodynamic dampers of the dancing of the line an elongated plastic plate 11 (Fig. 11, 12), its parts 12 and 12 "on the other hand in the form of a half-rifle executed ran estigungselementeb 14 lie, with whose help the aerodynamic damper mentioned on the Lei t he 1 ^ attached wixxL.

Here, in one of the versions, the parts 16 and 17 (FIG. 15) can follow the elongated plastic plate the height be the same, while in other versions the parts 18 and 19 (Fig.14) of the elongated plastic plate can be different according to the altitude.

Such a construction of an aerodynamic damper

he lead ^ i t an elongated art at place plate, aeren Parts are arranged on both sides of the fastening element, has a grater of additional positive holdings of its own, unu, she

- scnaxft conditions for a stronger eddy formation, Aie aas ranzen of the lines cause buoyancy to be effective under

- vei'üxaaert aie expression ues ixufils one intense. axiv.en ubx- ^ eitun ^ en promoteaen Eisbeuanges;

- completely or partly the Enteteuuug of a Jx-ecuaou.entes i.a system "plate from aerodyBeuaiecüen

Dri-ipfor -Leiter "from the Dei of the arrangement of the plate

outside of the lei lei arises uad it ujl aie axis aes conductor twisted in a way that the dancing of the Lines au ^ losenae buoyancy is effectively suppressed; - v ^ rrrdrv! There is a lot of work involved in assembling the

'- ¹ WQ $ 64

Claims (2)

3CHUT CLAIMS 1. Aerodynamic damper of dancing conductor an overhead power line, which is an elongated plastic plate and an element for securing said elongated plastic plate to said conductor, characterized in that the Fastening element (8) made of plastic in i'orm one Half-rifle made uniform with the aforementioned elongated plastic plate., with an opposite to the outer diameter of the Said conductor (9) is made by the value of the oversize smaller diameter d * r inner surface, with the said fastening element (8) in relation to said elongated plastic plate (7) is arranged such that its generatrix along said elongated Plastic plate (7) is directed., 2. Aerodynamic damper of the dancing line according to claim 1, characterized in that that the elongated plastic plate (7) in cLur Plane, aie approximately through the geometric longitudinal axis of the aforementioned fastening element, which is designed in the form of a half-sleeve (B) goes, on a side ce of this is arranged, j>. Aerodynamic damper aes dancing the line according to claim 1, characterized in net that aie angXicne plastic plate (11 ) in the i-oene, which goes approximately u through ax geometric longitudinal axis of the mentioned, m shape of a labducase executed fastening element (1A-), is so angeorci.net that the one. Part (1 ^ j of said elongated plastic plate is on one side of said fastening element and its other part (13>; a & i on the other side of said fastening element.