escalator dimensions, stairs

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what is escalator and how you make it ? 

escalators stairs design
amazing escalator design idea
Not first century facilitate our walking miracle stairs Jesse Reno. Although the original objective was escalators powerful passenger transportation in subways, train stations and major stores, the availability of funds are no fundamental restrictions for their use in a wide variety of indoor and outside them.On the background of crystal chandeliers and heated garden paths it not so much luxury. And in some cases - in hospitals or homes with disabilities, in offices where staff had to constantly move from floor to floor, in areas where produce a continuous cyclical inspection (eg, electrical, located on different floors) personnel on duty, - and at an absolutely necessary tool. though Lifts require less space and facilities, can not be compared with escalators on convenience, speed and bandwidth.
escalators Ads ideas
creative escalators super idea
Currently commercially manufactured escalators length from 3 to 75 meters and cost respectively from several thousand to a million dollars.In the widely varied as their load capacity, speed and smoothness, length, width and height of the steps, climatic performance, noise characteristics, decoration, lighting, design details. Tilt angle can reach 35 degrees for a relatively small height (up to 7 meters) and 30 degrees for long escalators.

Thus, we can always choose (or order exclusive) mechanism for any conceivable application: united floors or terraces in the park, people rise to the head of a statue or inspect able pool water . It is difficult to recommend such a complex piece of engineering for the self-made (although historically cases where planes going it alone in the garage). But a brief overview of the technical challenges faced in the design and maintenance of escalators, and help when buying a ready: it is always helpful to know what options to look for, and what is due to the cost.
escalators
modern escalators design
Classical escalator structure is a set of steps, carts, mounted on the traction chain such that each step bears only the load of the weight of people being directly thereon, and the total force on the chain falls and reaches a maximum at its highest point.Special force acting as a chain, and the undercarriage bogies occurs when it is kinked around the drive sprocket and considerably exceeds the average tension on the payload.It is inversely proportional to the length of the link and the radius of inflection. Similarly, these parameters depend on the longitudinal "sitter" that reduces passenger comfort and durability of the escalator. But it is impossible to reduce the length of the link on the strength reasons.As a result, large diameter sprocket escalators exceed 2 meters. Therefore, a huge moment on the shaft, so - a huge gear.

escalators terminology
escalator parts terminology
she stage-trolley must withstand a force of more than 600 kg (on the knoll chain). Moreover, the total backlash of its moving parts may not exceed 0.4 mm. As a result, the cost of a conventional single stage metro escalator (ET-2, ET-3) - 277.0000 USD .

Of course, almost all of the problems outlined greatly simplified the transition to a smaller size and power. When the length of the escalator is not measured in tens and units of meters, the design load is 2 people on each step, and 5 people . It's just a difference. Until the transition from quantitative to qualitative changes: instead of rattling chains and metal carts - polymer parts (light, cheap, in many cases do not require lubrication) instead twitch gearing- and smooth clutches . Even with purely quantitative (without changing the concept) reducing the load capacity and length of 2 times the power consumed by the escalator is reduced 4-5 times the cost - about 4 times. If you get to the same qualitative leap, change orders are measured.
escalators
modern escalators design
More fundamental changes in the design (and price) occur during the transition to the corners than lifting 12-15 degrees. At the same time have the opportunity to opt out of the steps. Such mechanisms are called travelators or (at very small angles) passenger conveyors. Their work is a flat blade (of course, with high roughness and not slippery surfaces) polymer or metal strap hinge. Often (at an appropriate distance from the walls and surrounding objects) on the travelers can not use handrails. In many cases, they are more convenient escalators (transport of goods, carts, children and wheelchair users), more economical, quieter.  The only drawback - they occupy a large area to ensure the lift to the same height, and are used, respectively, only in large areas or open spaces, except in cases where the height difference is negligible levels connected.
curved escalators
curved escalator design
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