A hydraulic elevator is an elevator that works with oil pressure and the driving force of the cabin is supplied by a power unit and a piston. And in fact, by changing the oil pressure, the corresponding jack moves the elevator cabin up or down. Compared to traction elevators, these types of elevators occupy less space in the building and do not require an engine room above. This type of elevator is divided into direct-central, direct-side and indirect-side hydraulic types according to the connection between the cabin and the piston. .
Most of these elevators are controlled by a piston that is installed in the lower part of the elevator chamber. The highest speed of these elevators is estimated to be 200 feet per minute (one meter per second). In general, in the classification of types of elevators and their speed, they are among the average examples.
Such elevators require the presence of an engine room, which is located in the lowest part near the elevator shaft. These elevators are available in the market in two types of elevators with shafts and without shafts.
Hydraulic elevator (pits)
When the chamber is moving down, by means of the cable embedded in the bottom of the well, the piston is in a retracted and small position. In some of the production examples of such elevators, a telescopic piston model is used, for its installation, it is necessary to create a hole with a shallow depth in the lower part of the well. The maximum distance that this model of elevators can move passengers or cargo is about 19 meters per minute.
A hydraulic elevator without a well
In this model of elevators, we see a piston on both sides of the chamber, which includes all types of hydraulic telescopic, non-telescopic and rope elevators.
Telescopic types: In such The models are equipped with two to three telescopic pistons that are able to manage the elevator speed up to a height of 15 meters. These equipments are set in the foundations of the elevator shaft and no longer need cables, pulleys or holes under the shaft. and have the ability to move the chamber up to about 6 meters per minute.
Cable types (rope) : As the name of these elevators shows, in addition to using pistons, cables are also used. This model can move the chamber to a distance of 18 meters.