Reviving the Old Escalator

Reviving the Old Escalator

The whole subway station “Polytechnic Institute” in Kiev was reported to be closed soon only due to the malfunction of the escalator. It does not seem too reasonable, right? But why is repair of an escalator so difficult to do? Let us check this out.

The process may take one month or two. The tunnel escalator is a complex machine with a huge number of moving parts. There are more than 600 stairs and about ten thousand of bearings. Many parts are subjected to heavy wear: if the escalator works no-nstop, it will overcome twenty eight thosand of kilometers. Overhaul must be done every 170 thousand of kilometers. If it suddenly breaks the consequences can be rather bad.

During the overhaul it is almost fully disassembled in the strict order: stairs, pulling chains, guide rails, etc.

The orther day they finished the dismantling of the parts of the escalator under repair. Almost all of them were brought to shops of the escalator service: each detail must be disassembled, cleaned, examined and repaired, if necessary.

Reviving the Old Escalator

The most interesting place is hidden under the feet of passengers – the turbine hall.

Reviving the Old Escalator

The disassembled escalator looks like this now.

Reviving the Old Escalator

This is a turbine hall. To the left is escalator № 2, a bit righter is №1. № 3 is hidden at the opposite side of the room.

Reviving the Old Escalator

The first machine – to the right is the engine with a break unit, to the left, behide the lattice, an upper sprocket is rotating – the stairs are endlessly running over it.

Reviving the Old Escalator

On the other side is the gearbox casing, through which the torque is transmitted from the engine to the sprocket.

Reviving the Old Escalator

We can see inside the main construction and watch how the stairs, turned upside down, are moving.

Reviving the Old Escalator

Each escalator is equipped with a powerful drive motor, which should ensure the escalator to start lifting at the highest possible load.

Reviving the Old Escalator

The escalator is equipped with a automated brake at the input shaft. The brake, as well as the escalator itself, are filled with numerous sensors. Safety of passengers depends mainly on this mechanism. At the slightest risk the escalator should stop. That red button is for an emergency call.

Reviving the Old Escalator

The work of the escalator and its parameters are controlled from this box.

Reviving the Old Escalator

This is how the turbine hall of the first Kiev subway stations looked like.

Reviving the Old Escalator

Reviving the Old Escalator

Some old mechanisms are still in use.

Reviving the Old Escalator

Rails with turning tables have also been preserved. They are used to  move cargoes over the turbine hall.

Reviving the Old Escalator

This is a spare drive motor.

Reviving the Old Escalator

Reviving the Old Escalator

But let us get back to the disassembled machine. Here only the reductor and the drum for braking have remained. In the center is the sprocket.

Reviving the Old Escalator

Parts of the safety enclosure lie nearby.

Reviving the Old Escalator

This is the reductor. Almost all parts of the brake are dismantled.

Reviving the Old Escalator

It’s the bearing of the main shaft.

Reviving the Old Escalator

Reviving the Old Escalator

The upper sprocket. The chain mounted over is pulling the stairs.

Reviving the Old Escalator

Reviving the Old Escalator

The force is transmitted from the engine to the main shaft through the gear, and the main shaft rotates the sprocket.

Reviving the Old Escalator

The operating corridor under the guard rail for the maintenance of the machines between the second and the third escalators.

Reviving the Old Escalator

Inside the disassembled escalator.

Reviving the Old Escalator

Handrail tensioning system is mounted in the upper part of the escalator.

Reviving the Old Escalator

The escalator is too long and its load may considerably vary so the extra system of handrail and stairs tensioning is necessary.

Reviving the Old Escalator

The tensioning chamber.

Reviving the Old Escalator

It’s the lower sprocket of the disassembled machine.

Reviving the Old Escalator

But how do more modern machines look like? This is “Pecherskaya” station which opened in 1997 and its turbine hall. The units are placed more reasonably: the drive motor is hidden under the upper sprocket, for example.

Reviving the Old Escalator

These are the upper sprocket of the forth machine and the open reductor (overhaul 2011).

Reviving the Old Escalator

Reviving the Old Escalator

The control station is also more compact.

Reviving the Old Escalator

Its’ the turbine hall of subway station “Syrets” (2004).

Reviving the Old Escalator

That little engine painted blue is also an auxiliary drive which is used during the repair and adjustment work to move the stairs at a speed not more than 4 cm / s.

Reviving the Old Escalator

Reviving the Old Escalator

Reviving the Old Escalator

Reviving the Old Escalator

The control station of “Syrets” has a modern electric filling.

Reviving the Old Escalator

Reviving the Old Escalator

And these are some assistants of the escalator service of “Syrets” subway station and they say goodbye to you!

Location: Kiev, Ukraine

via tov-tob

7 thoughts on “Reviving the Old Escalator”

  1. And they call that modern? Still with that huge ‘turbine hall’? Ouk’hey 🙂

    ..compared to modern Kone escalators, witch doesnt need much more room, than the stairs themself..

  2. But yet my wife tells me russia is so advanced and modern compared to america. That thing is awful looking 50’s technology if not earlier right there. Government really likes to contently upgrade there facilities to help the people it seems

  3. The “assistants” need to have their water changed. Red-Ear Sliders are native to the southern US but are popular all over the world.

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