AT9826U1 - POWER RAIL - Google Patents

Description

2 AT 009 826 U1

The invention relates to a busbar for rail-bound vehicles. Railbound vehicles, e.g. electrically powered railways are powered by a catenary system. The catenary system consists in most cases of contact wires, which are suspended from suspension cables and held by structures. The power transmission of trolley wire, also called overhead contact line, is carried out by a vehicle-mounted pantograph, which is referred to as a grinding bar or pantograph. Although the support cables are highly tensioned, it is unavoidable that they sag between the individual suspension points, so that the height of the contact wire constantly fluctuates over the rail, which must be compensated by movements of the pantograph. However, this also changes the contact forces between pantograph and contact wire, which can lead to vibrations, uneven contact resistance and sparking.

In DE 24 36 640, therefore, it has also been proposed to provide the suspension of the overhead lines at attachment points of different spacing and irregular sequence in order to achieve wave propagation of the oscillations of different wavelengths and to avoid resonances. For high-speed lines, which are to be driven at 240 km / h and faster, but this measure is not enough.

Furthermore, rigid busbars are also used as wear-able conductors for power transmission, with busbars being used as the overhead line predominantly only in tunnels, since they require less space. Such busbars are known from DE 201 00 960 U1, DE 201 01 581 U1, DE 42 07 622 C2, DE 195 48 103 C1 and AT 409 904 B.

Busbars in which a copper trolley wire is clamped between and held by support arms are also known from US 918761, FR 2 470 020 and US 4 230 209. In this case, a so-called groove wire is used, i. a copper wire with V-shaped grooves, in which clamping arms of the busbar interlock positively to hold the contact wire. The contact wire, which is groomed by the pantograph and therefore subject to wear, can thus be replaced.

The clamping of the corrugated wire takes place in that the two mirror-symmetrically opposite clamping arms above the corrugated wire screwed together (US 4,230,209, FR 2 470 020, DE 43 33 446 A1, DE 195 48 103 C1) or riveted (US 918 761).

The installation of the corrugated wire to the busbar, either in the original equipment or later replacement of a ground contact wire is therefore very time consuming and cumbersome, as in short distances screw or riveted joints must be made.

The individual elements of the busbars have in practice a length of about 10 m to 12 m. At junctions of two adjacent busbars then the subsequent problem occurs that for a possible exactly rectilinear alignment of the busbars on both sides of the joint must be attached to a supporting structure or the ceiling of a tunnel, which also requires considerable effort. For example, if you attach each busbar only in the middle of a supporting structure or a tunnel wall, so the two ends of the busbar can bend by its own weight, so that noticeable kinks occur at the joint against the rail axis, which mechanically load the contact wire and vibrations at the power take lead.

The object of the invention is therefore to provide a busbar that holds a corrugated wire safely, which is easy to install, in which the contact wire can be easily replaced and ensures the most straight course of the contact wire and indeed at joints of adjacent busbar elements. 3 AT 009 826 U1

This object is achieved by the features specified in claim 1. Advantageous embodiments and further developments of the invention can be found in the dependent claims.

Basic principle of the invention is to form the busbar as an elongated, one-piece, slotted in the longitudinal direction profile, which has a flat cross member and two of this substantially vertically protruding clamping arms. The clamping arms are each connected to a clamping arm which extends at an acute angle to an axis of symmetry. The clamping arms and / or the clamping arms are resilient, so that the contact wire is held exclusively by the spring force of the clamping arms and / or the clamping arms. A screw for clamping the contact wire is no longer required. Rather, a closed, interrupted only by a longitudinal slot box profile is created, which has a high bending stiffness and holds the contact wire in a straight axis, whereby an absolutely constant distance of the contact wire to the rail is guaranteed. The insertion and replacement of the contact wire is very easy and quick to perform. According to a development of the invention, the cross member is wider than the distance of the clamping arms transversely to the longitudinal direction of the busbar, so that therefore the cross member projects on both sides beyond the clamping arms. As a result, the area moment of inertia and thus the rigidity of the busbar is increased.

According to a development of the invention laterally projecting cantilever arms are provided in the transition region of the clamping arms to the clamping arms, the top of the cross member facing is flat and their underside facing the contact wire has a groove. These cantilevers serve on the one hand for holding and guiding a wire insertion device, which spreads apart the two clamping arms for inserting or removing the contact wire. This device can run along the top of the cantilevers and engage through the grooves located at the bottom for spreading the tension arms. In addition, these cantilevers also serve to increase the area moment of inertia and thus to improve the flexural rigidity of the busbar.

According to a development of the invention, the clamping arms have at their respective to the other clamping arm facing inside at least one, preferably two projections which extend over the entire length of the busbar. By these projections, the area moment of inertia and thus the rigidity of the busbar is also increased. These projections have a rectangular, trapezoidal or triangular profile, the trapezoidal profile is the most preferred embodiment.

These projections are also used according to a development of the invention at frontal joints of successive busbars as a spring of a tongue and groove connection between the clamping arms and bumpers that bridge the joint. The bumpers have the projections corresponding grooves and are attached to both sides of the joint with only one or two screws on the clamping arms. The clamping arms have for this purpose a hole and the butt plates a threaded hole. Through this tongue and groove connection an exact, rectilinear alignment of the contact wire is obtained at junctions of adjacent busbars and there is no more kinking at the joints. Thus, these busbars are also suitable for high speeds of up to 250 km / h and more. Preferably, two butt bumps are used per joint, which are each connected to one of the two clamping arms.

According to a development of the invention, at least one, preferably two contact blade strips can be arranged between the respective butt strap and the associated tensioning arm, which improve the electrical connection between the butt straps and the tensioning arms of adjacent busbars. For unambiguous fixation and better mounting of the contact lamella strips, the push tabs for receiving and holding the contact lamella strips can have a depression with mutual undercuts. 4 AT 009 826 U1

According to another embodiment of the invention may be provided over the entire length of the busbar extending web, which protrudes perpendicularly from the surface of the cross member at the top of the cross member. It is also possible to use several such webs in parallel next to each other.

In the following the invention will be explained in more detail with reference to embodiments in conjunction with the drawings. It shows:

1 shows a cross section of a busbar according to a first embodiment of the invention.

Fig. 2 is a bus bar according to a second embodiment of the invention;

Fig. 3 shows a cross section of a busbar according to a third embodiment of the

Invention;

Fig. 4 is a side view of the bus bar of Fig. 3;

5 shows a cross section of a butt strap;

Fig. 6 is an enlarged view of the detail A of Fig. 6; and

Fig. 7 is a side view of the butt strap of Fig. 6 with inserted contact blades.

Fig. 1 shows a busbar 1, which has a longitudinally slotted profile, in which a contact wire 2 is inserted and held there in a form-fitting manner. The busbar 1 has a plate-shaped cross member 3 with a flat surface, from the two clamping arms 4 and 5, which are mirror-symmetrical to an axis of symmetry 6, protrude substantially perpendicularly. Starting from the cross member, the clamping arms 4 and 5 are slightly tapered, wherein the angle between the inner and outer surface of the clamping arms is about 1.5 °. At the free ends of the clamping arms 4 and 5 respectively clamping arms 7 and 8 are mounted, which protrude at an acute angle of the clamping arms and to run towards each other, wherein the clamping arms each have a tip in correspondingly shaped grooves 9 and 10 of the contact wire 2 intervene. The tips mentioned and the grooves 9 and 10 have for example an angle of 78 °. The grooves 9 and 10 are arranged above a running through a central axis of the contact wire level.

At the transition region between the clamping arms 4 and 5 and the clamping arms 7 and 8 lateral, facing away from the axis of symmetry cantilevers 11 and 12 are mounted, the cross member 3 facing upper side is flat and the side facing away from the cross member 3 underside a recess or groove 13 and 14, which serves as a guide for a movable contact wire insertion device, which spreads the clamping and clamping arms for inserting the contact wire.

The cross member 3 projects laterally beyond the clamping arms 4 and 5 on both sides and is thickened in the transition region to the clamping arms via bevels.

The entire busbar 1 described so far is designed as a one-piece profile that can be produced in the pultrusion process. As the material, for example, aluminum or an aluminum alloy is used, which or have the good electrical conductivity, so that the power supply to the contact wire 2 can also be done via the busbar 1.

The busbar 1 forms a total largely closed and interrupted only by a longitudinal slot for receiving the contact wire 2 box section that holds the contact wire 2 only by spring forces of the clamping and clamping arms. The profile as a whole is highly resistant to bending and torsion, wherein the clamping and clamping arms can be resiliently reciprocated to a small extent with respect to the axis of symmetry 6 to insert or replace the contact wire. On the other hand, this movement possibility is limited by the shape, dimensioning and material properties so that the contact wire 2 is held securely and is held securely even under mechanical loads by the pantograph of a vehicle. 5 AT 009 826 U1

For reasons of transport, handling and assembly, busbars on a track have a maximum length of 10 m to 12 m. For a distance then multiple busbars are connected to each other end-to-end abutting, which is done by butting plates 15, 16, which are inserted into the interior of the busbar profile and bridging the joint between two adjacent busbars (see Fig. 4).

Fig. 1 shows two such bumpers 15, 16, which generally have a rectangular profile and are each secured to the inside of an associated clamping arm 4 and 5 respectively. The length of the butt plates 15, 16 is of the order of 40 cm. The bumpers serve both the electrical connection between two adjacent Stromschiehenprofilen as well as for the transmission of mechanical forces. The butt plates 15, 16 are fastened by screws 17, 18 which project through bores 19, 20 of the clamping arms 4, 5 and are screwed into threaded bores 21, 22 of the butt plates 15, 16. Only two to four screws, which are screwed to adjacent busbars on both sides of a busbar joint, are required per push-fit tab.

Due to a puncture clearance of the bores 19, 20, a small, but still unfavorable deflection of the busbar axes could occur, which may result in a kink at the joint. Such a kink has a negative influence on the current decrease, since the pantograph is deflected there, thus can not continuously grind on the contact wire 2, whereby the contact forces between pantograph and contact wire zoom in or out, creating the risk that the pantograph of profile jumps, the contact force loses and thus the power supply. These mechanical-geometric and electrical disadvantages can not be accepted for a high-speed overhead conductor rail. For this purpose, in addition to the screw additionally a positive connection between the busbars and the butt straps is realized and that in principle with a tongue and groove connection.

For this purpose, on the inner sides of the clamping arms 4 and 5 projections 23, 24 and 25, 26 are mounted, which protrude inwardly into the cavity of the busbar profile. The projections extend over the entire length of a busbar, since it is an extruded profile. The spacing of the projections 23 and 24 or 25 and 26 is chosen as large as possible, i. the respective projections are as close as possible to the two ends of the clamping arms 4 and 5, respectively.

The butt plates 15 and 16 have corresponding grooves 27, 28 and 29, 30, in which engage the associated projections 23-26. Through this positive tongue and groove connection has a possible hole play the holes 19 and 20 has no effect and, even if the tongue and groove connection should have a small game, goes because of the length of the butt straps and thus the length of the tongue and groove connection a deflection or a kink between adjacent busbars virtually zero. Thus, the overhead conductor rail can be laid practically exactly in one axis and there are no discontinuities, whereby the power consumption is improved and high speeds up to 250 km / h and greater are possible. Possible deformations are distributed continuously over the entire busbar system. Deflections in the vertical direction no longer occur at the joints.

In addition, an additional stiffening of the busbar profile is achieved by the projections 23, 24 and 25, 26.

In the embodiment of Fig. 1, the projections 23-26 in cross-section a trapezoidal profile, preferably the profile of an isosceles trapezoid. Accordingly, the grooves 27-30 also have a trapezoidal profile whose depth is slightly greater than the height of the projections 23-26. This achieves a wedge effect, which ensures that always a tight-fitting connection of the tongue and groove joint takes place, even if at 6 AT 009 826 U1 the production of the projections and / or grooves a certain amount of play is present. As a result, a defined mechanical connection is always achieved and at the same time a perfect electrical contact. In addition, it should be noted that the screws 17, 18 need not absorb any (vertical) transverse forces, so that four to eight screws are required per track push, namely two per bumper. It should be noted that the leading edges of the projections and the leading edges of the grooves may be chamfered or rounded to facilitate insertion of the butt straps.

In order to achieve a better electrical connection between the butt straps and the clamping arms, according to a development of the invention may additionally be provided between the outside of the butt plates 15 and 16 and the inside of the clamping arms 4 and 5 each one or two contact lamellae strips 31, 32, 33rd 34, which will be described in more detail in connection with FIGS. 5, 6 and 7. This ensures that the electrical connection is made not only in the region of the tongue and groove joint, but also between the larger vertical surfaces of the butt plates and the clamping arms.

In the embodiment of Fig. 2, the projections 23-26 and the grooves 27-30 are rectangular, resulting in experiments to improved power transmission. Since the depth of the grooves 27-30 is greater than the height of the projections 23-26, it is always ensured that the vertical, opposing surfaces of the butt plates and the clamping arms come into contact with each other. Therefore, it is not absolutely necessary to provide the contact blade strips 31-34. However, these can of course be provided to improve the contact resistance.

In addition, in the embodiment of Fig. 2 for further stiffening of the busbar profile at the top of the cross member 3, a perpendicular projecting from this web 34 is provided, which extends over the entire length of the busbar. This web is arranged centrally in the embodiment of FIG. It is also possible to provide a plurality of such webs, which then run parallel to each other at a distance.

At this point it should be noted that such webs can also be provided on the busbars according to the other embodiments, ie in particular Figs. 1 and 3-7.

In the embodiment of Fig. 3, the grooves 27-30 and the projections 23-26 are triangular in cross section. Again, it can be ensured by appropriate dimensioning of the projections and / or the grooves that the vertical surfaces of the butt plates and the clamping arms always touch, so that here the contact lamella strips can be omitted.

Fig. 4 shows a side view of a joint 35 of two adjacent conductor rails 1 and 1a, which follow one another at the joint 35, which is shown here for clarity as an enlarged gap, and bridged by the butt plates 15 and 16 (not visible in Fig. 4) , In practice, the gap is kept as small as possible and is determined by the spacing of the holes 19 and 20 to the end 36 and 36a of the busbar 1 and 1a on the one hand and the distance of the threaded holes 21 and 22 on the respective butt strap 15 and 16 respectively , In practice, with a length of the bump plates of about 400 mm, the distance between the threaded holes on a butt strap at 200 mm, these holes are to be arranged symmetrically to the center of the butt strap.

FIG. 5 shows a cross-section of a butt strap according to FIG. 2 and FIG. 6 shows an enlarged detail of detail A. For fastening the contact lamellae strips, a depression 37 is provided on the vertical surface 36, which in the assembled state is opposite the tensioning arm, which edge Undercuts 38 and 39 has. In this recess 37

Claims (12)

7 AT 009 826 U1, a contact lamella strip can be inserted and held by the undercuts 38 and 39. The undercuts each have a radius in their reason. The contact lamella strips extend over the entire length of the butt straps, as can be seen from FIG. Such contact lamella strips are commercially available. They consist of electrically highly conductive material, such as e.g. Copper or aluminum, and have a variety of flexible blades. The depth of the recess 37 is in practice about 0.5 mm, while the width of the recesses in the order of 13 to 14 mm. The angle of the undercut 38 is on the order of 30 °. As shown in FIG. 5, the butt strap has two recesses 37 and 37a, which are preferably arranged symmetrically to the central axis of the threaded bore 22. Fig. 7 shows a side view of a butt strap with inserted contact lamellae strips 31 and 32 and the two threaded holes 19. The invention provides very stable and easy to install busbars as longitudinally slotted hollow profiles, which have no deflections in the vertical direction and are therefore suitable for high-speed routes. By a positive connection of two longitudinally slotted hollow profiles to obtain a good electrical connection, which can be improved by contact lamellae strip. Due to the special shape of the busbars insertion and also a later replacement of a contact wire is easily and automatically possible. Claims 1. Busbar for holding a contact wire with two clamping arms, between which the contact wire is held, characterized in that the busbar (1) an elongated, one-piece, longitudinally slotted profile with a cross member (3) and the two of this in the substantially perpendicularly projecting clamping arms (4, 5), that the clamping arms (4, 5) each with a clamping arm (7, 8) are connected, which extends at an acute angle to an axis of symmetry (6) that the clamping arms (4, 5) and / or the clamping arms (7, 8) are resilient, and that the contact wire (2) exclusively by the spring force of the clamping arms <4, 5) and / or the clamping arms (7, 8) is held. 2. Busbar according to claim 1, characterized in that the cross member (3) is wider than the distance of the clamping arms (4, 5) transversely to the longitudinal direction of the busbar. 3. busbar according to claim 1 or 2, characterized in that in the transition region of the clamping arms (4, 5) to the clamping arms (7, 8) laterally projecting cantilevers (11, 12) are provided, the cross member (3) facing top is even and whose the trolley wire (2) facing underside has a groove (13, 14). 4. busbar according to one of claims 1 to 3, characterized in that the clamping arms (4, 5) on its side facing each other clamping arm inside at least one projection (23, 24, 25, 26) which extends over the entire length the busbar (3) extends. 5. A busbar according to claim 4, characterized in that each clamping arm (4, 5) has two projections (23, 24, 25, 26) which are arranged near the two ends of the respective clamping arm (4, 5). 8 AT 009 826 U1 6. busbar according to claim 4 or 5, characterized in that the projections (23, 24, 25, 26) in cross section have a rectangular, trapezoidal or triangular profile. 7. Busbar according to one of claims 4 to 6, characterized in that at the frontal joints (35) of successive busbars (1, 1 a) at least one butt strap (15, 16) is provided which bridges the joint (35) that the butt strap (15, 16) has the projections (23-26) corresponding grooves (27-30), and that the butt strap (15, 16) on both sides of the joint (35) each have a threaded bore (21, 22) through which the butt strap (15, 16) with the ends of two successive busbars (1, 1 a) can be screwed. 8. Conductor rail according to claim 7, characterized in that per joint (35) has two butt plates (15, 16) are provided, each with one of the two clamping arms (4, 5) are connectable. 9. busbar according to claim 7 or 8, characterized in that between the butt strap (15, 16) and the associated clamping arm (4, 5) at least one contact lamella strip (31-34) is arranged. 10. Conductor rail according to claim 9, characterized in that each butt strap (15, 16) are associated with two parallel contact lamella strips (31, 32, 33, 34). 11. A busbar according to claim 9 or 10, characterized in that the push tab (15, 16) for receiving and holding the contact lamella strips (31-34) has a recess (37) with double-sided undercuts (38). 12. Busbar according to one of claims 1 to 11, characterized in that at the top of the cross member (3) at least one vertically upwardly projecting web (37) is provided which extends over the entire length of the busbar. For this purpose 5 sheets of drawings