An escalator is a fixed electric drive device with a circulating running step for tilting passengers up or down. (Extracted from national standard GB16899-1997)
The escalator is a combination of a special-structured chain conveyor and two special-structured belt conveyors with a circular motion ladder for up or down between different levels of the building. A fixed electric drive that tilts the passengers (see photo to the right). A continuous conveying machine that carries people up and down.
The escalator consists of a ladder (variable slab conveyor) and armrests on both sides (deformed belt conveyor). The main components are step, traction chain and sprocket, guide rail system, main drive system (including motor, speed reducer, brake and intermediate drive link, etc.), drive spindle, ladder tensioning device, armrest system, comb plate, escalator skeleton And electrical systems, etc. The steps are horizontally moved at the entrance of the passengers (convenient for passengers to board the stairs), and gradually form a step; the steps gradually disappear after approaching the exit, and the steps are again horizontally moved. These movements are realized by walking the main and auxiliary wheels of the step along different step guides.
The main parameters of the escalator are:
Lifting height: generally within 10 meters, in special cases up to tens of meters.
Tilt angle: generally 30 °, 35 °.
Speed: generally 0.5 m / s, and some ladder types can reach 0.65 m / s, 0.75 m / s
Step width: 600 mm, 800 mm, 1000 mm.
Theoretical conveying capacity: According to the speed of 0.5 m / s, the conveying capacity of different step widths is 4,500 person / hour, 6,750 person / hour, 9,000 person / hour.
Step pitch and traction chain pitch.
It can be widely used in places where people, such as stations, docks, shopping malls, airports, and underground railways, are concentrated. In 1900, a stepped ladder displayed at the Paris International Fair was the prototype of a modern escalator. In the future, escalators have developed rapidly in various countries.
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