Offers a glimpse into the interior of the escalator and look at the time-consuming repair this moving stairs.
Everyone is familiar with this device, someone riding on it every day :)
From January 9 began overhaul escalator №3 Art. "Polytechnic Institute". Such repairs are carried out regularly at all stations, but "Polytech" opened in 1963 and having 3 escalator during repairs pops one annoying trait.
During normal operation, the station in the morning peak flow of people on the way out so that you have to use all three machines: two on the rise and one on the descent. Exactly the same situation in the neighboring "the Station", where the last repair escalators took only a couple of years ago. This means that if one of the escalators stopped for repairs, have to sacrifice something. Leave one escalator on the descent and ascent can not be one-on-one escalator will not be able to remove the entire flow from the bottom and the people will gradually accumulate on the platform. In the worst case it will end someone's falling on the rails.
So both the escalator on the rise will have to leave, and the entrance to the station in the morning peak limit. This measure is unpleasant, but forced - it is better to create a crowd in an open space or spend too much time on the road to a nearby subway station, you create the potential flea market underground. It is an unwritten law.
It is because of the constant accumulation of people at the station was built the second transition between "Khreschatik" and "Maidan". For the same reason so desperately need a second transition between the "Theater" and "Golden Gate". Unfortunately, not everywhere and not always fulfill the law, and this is very bad, but wherever possible to avoid the notorious big crowd at the station, the choice can be only one. According to current building codes, stations deep foundation with one output should be at least 4 escalators, but on older plants with 3 machines something radically change the already very difficult.
Why escalator repair lasts a month or two? Tunnel escalator - a rather complicated machine with a large number of moving parts: on the same "Polytech" alone, nearly 600 steps, and various bearings about 10 thousand. In contrast to the escalators of floor that we see in various shopping malls, large length of tunnel escalators imposes specific requirements for durability and reliability of their designs.
However, many details are subject to considerable wear, if the escalator would work continuously for a year ladder painting will be held on 28 th. Km. Overhaul of escalators that are set to "Polytechnic Institute" must be performed every 170 thousand. Km. Finally, the escalator - a very important mechanism: for example, by breaking one of the fans the lives of passengers is under the direct threat, and in the case of failure of the escalator consequences can be very unpleasant: the history of accidents were fatal and the former Soviet Union, the recent case with dangling handrail on the "Golden Gate", which injured a man - a very easy example of the possible consequences. Therefore, on the condition of all parts of the escalator depends very much, and given the amount of one night will not replace all.
During the overhaul of the escalator is almost completely disassembled in a clearly defined sequence: first, to dismantle the stairs, then traction chains that pull the ladder painting, guides, devices, responsible for the work of handrails, traction motor, brake, auxiliary drive, gear shafts and more. When this is in place furring escalator and several other parts of the machine, which also pass the inspection and repair. On paper, the description of the repair and maintenance of the escalator takes more than a dozen pages.
Recently at the "Polytechnic Institute" finished dismantling parts repaired escalator. Almost all of them are now taken to workshops escalator services that are located in the electric depot "Darnitsa". Each item must be disassembled, cleaned of dirt and debris, to examine, if necessary, repair or replace the contents, touch up and reassembled. The problem of the accumulation of garbage is very relevant: the soles of shoes people are entered from the street a lot of dirt that remains partially inside the escalator. Some components (reagents for ice control) lead to corrosion of the metal. As practice shows, during the overhaul must be changed to 50% coverage of the stairs - it wears out the most.
After an all-out inspection and repair parts escalator they are set into place in the reverse order. In this case, upon completion of all work on the escalator can let passengers only after a complex checks, run-in and acceptance of regulatory agencies.
Behind the green fence, which appears every time at one of the stations begins escalator repair, nothing special there. There is an overload of equipment and perform some repairs escalator. The most interesting thing is hidden in the engine room, which is under the passengers' feet.
Polurazobrannom escalator and remove overlap on turbine chamber. Big-eyed readers will be able to see a piece of the top stars, which we see below.
Down into the mash. hall. Type about turnstiles, as if we were looking at the escalator to the level we are used to. Left escalator №2, right - №1. №3 hidden behind them on the opposite side of mash. hall. Drives escalators are located at different distances from the input pad, as their size does not allow to put all the equipment between adjacent machines. For those interested in all three escalators have type LT-3, height 49, 4 m.
1st car. Right - the engine brake, left behind a lattice rotates the upper sprocket on which an endless stream flipped stage.