20. December 2010 18:28
You might be forgiven for thinking that an elevator is an elevator is an elevator; and that there is little variation between them, but this is actually a grave oversight if you are looking at having them installed in your building. There are many variations possible for elevators and we will look at just two very disparate ones here.Some elevators require machine rooms, but many more modern elevator designs will be ‘machine room-less’. This means that all of the components or most of the components of the lift fit inside the shaft itself and this has many benefits. For one, a machine room-less elevator will leave more usable space which can be used for any purpose that the building owner decides. At the same time these are generally more energy efficient and tend to save 70% and more energy when compared to hydraulic counterparts. These also do not require any oil to run, and are less costly to install. They can also run slightly faster which might mean more available time for staff to work on other projects – as they say, time is money.On the downside however these elevators will be slightly more expensive to maintain (you should get your maintenance cheaper by using a lift maintenance contract).
14. September 2010 16:26
You need to record the period for which the car’s doors remain open at each floor. Elevator passengers typically can exit a car in two or three seconds, and can enter a car in about four seconds. Doors that remain open for much longer than this only slow down service. Also important in this exercise is the performance of the door reversing device. When the doors are blocked, they should open again immediately, and then attempt to close again right away. Again, any delays only reduce service. Once the doors are closed, the car should move away immediately.
When measuring the speed with which a car moves from floor to floor, managers must consider the type of hoisting mechanism, and its horsepower, employed by the elevator. A geared elevator, which typically moves at speeds up to 400 feet per minute, should be able to travel the height of ten floors in five or six seconds. Higher speed gearless elevators, which can move 500 feet per minute or faster, can cover the same ten-floor span in four or five seconds. Conversely, slower hydraulic elevators, which typically are limited to speeds of 150 feet per minute, take up to eight seconds to travel the ten-floor distance.