Add  a report and ppt about the hydraulic escalators

Abstract

An escalator is a mechanized hilling staircase, where lots of foot traffic is common in places, where a traditional ladder is very long and is tired to climb. Escalators can often be seen in shopping malls, museums, multi-story parking garages and metro stations, for example escalators are often established in pairs, with an escalator and an escalator near each other, while the day's separation According to the direction of heavy traffic on time, an escalator can be changed to move up or down.

An escalator is similar to a conveyor belt, but it is different that it is on a slope and the surface of the stairs instead of a flat belt. Most escalators also include a railing that runs in combination with the stairs.

To move from one end of an escalator to another, one person can stand on one step until reaching the end, or climb or climb on a traditional staircase such as the escalator. Many escalators in busy areas are enough to accommodate two pillars of people, and people who want to stand traditionally stay on one side of the escalator

The escalator, while relatively expensive and large, is actually a relatively original machine, an escalator's machinery is hidden beneath its feet, called truss. At the top of the escalator, placed in Truss, is an electric motor that runs four gears, all of which are escalators - two drive gear from both sides and both of the two return gears on both sides.

These gear are loop chain around the gear and run each part of the escalator down. Connected with each stage, these chains help in taking steps, or down, escalator

The handles which the riders use for their balance or safety on the riders or down escalators are governed by the same system which has the powers of the stairs at the top of the handles escalator, the long rubber loops attached to the two drive gear and the same Powers that are powered by electric motors

Speed ​​is governed by a governor, similar to the general principle, which is used on steam locomotives. Two heavy metal balls are attached to the pivoted liver, which are fixed for a vertical shaft, which rotate through gearing.

The shaft rotates faster, and more metal balls are gripped by centrifugal force, and the speed of the lift should be more than the preset, the governor plays the role of a break