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Description:
This application utilizes
a Drive Sheave, Motor, Ropes, and Counterweight, thereby
eliminating the use of hydraulics. This application can
be used for front openings as well as front and rear opening
configurations. The Drive Sheave is specially designed
to create Traction. The grooves are shaped like a “V”
to grip the ropes. “Geared” means there is
a Gear Box, called a Machine, which interfaces with the
Drive Sheave and Electric Motor. Several Rope / Sheave
arrangements are available to accommodate different project
requirements. The geared machine, along with the related
drive equipment, is generally located above the Hoistway
in a “penthouse” machine room.
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Advantages:
There is no risk of oil contamination in the ground.
This design offers almost unlimited Travel.
Traction car speeds are typically much faster than those
of hydraulic applications. A wide range of capacities
are available: this design will accommodate low capacity
passenger cars and high capacity freight cars. Because
of the counterweight arrangement, power efficiency is
greater than that of a Hydraulic application.
Disadvantages:
The material cost and the installation time are substantially
higher when compared to any of the Hydraulic applications.
There are structural building considerations, since all
of the loading forces are hanging from the overhead. Elevator
maintenance cost is generally higher (compared to Hydraulic
elevators).
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