2S-Bahn
The 2S-Bahn , also bicable orbit called, is a gondola whose vehicles depend on a supporting cable and are moved by a rope.
history
The first generation of circulating ropeways (especially material ropeways ) were mostly built in this mode of operation, as rope technology at that time was not yet advanced enough to build lang's lay ropes with good carrying properties. Their origins go back to the two-rope material ropeways, which Adolf Bleichert introduced from 1872 and became known as the German system . In Austria, the Bleichert material ropeway was further developed by Georg Wallmannsberger . Various systems were built with his Wallmannsberger cable car system from the 1950s onwards. However, as the performance of the ropes increased, this design fell out of fashion, as single-cable orbits were easier and cheaper to build. The need for higher transport capacities again led to the increased use of modern 2S lifts.
description
The 2S-Bahn connects elements of the aerial cableway and the circulating cableway . It has two lanes, each with a suspension cable, which is firmly anchored in one station and is kept in constant tension in the other by tension weights or hydraulic tensioning devices. On a cable car support , the support cable rests in a greased groove on the support cable saddle, like a cable car , in which it can slide back and forth to compensate for changes in weight and temperature. As with a gondola lift, the pull rope is endlessly spliced in a loop and always moves in the same direction without interruption. On the cable car supports, it runs over roller batteries which, depending on the type of support, are attached below the supporting cable saddle (for example with dome scaffolding) or further below so that the gondola can drive over them. The cabins take a usually consisting of four rollers drive on the supporting rope, and are (for example, Rendlbahn) operably attached releasably connected to a (for example, Eisjochbahn) or two independent terminals on the traction cable. In the stations, the cabins move from the carrying cable to a hanging rail, are decoupled from the pulling cable and braked by means of a tire decelerator. As with a single-cable gondola, they pass the platform area on the station rail. The arrangement of the platform area is different depending on the system. They are then accelerated again, driven onto the supporting cable in the opposite direction and coupled to the pulling cable at the coupling point, which ran around the deflection pulley in the station at a constant speed throughout the process. It is important that the coupling takes place as smoothly as possible in order to protect the pull rope. So that this also happens when the system is running at different speeds, the acceleration in modern systems is electronically controlled.
The most important advantage compared to monocable gondolas is the possibility of creating long spans between the supports. Seen in this way, a 2S cable car combines the advantages of a cable car (long span) and a circulating cable car (high transport capacity). In addition, a 2S cable car can be operated with larger gondolas and higher speeds.