Traction Geared Elevators
With a traction elevator, torque is transmitted from the motor driven sheave to ropes attached to the car.
In a Traction Geared Elevator, a gearbox transfers torque between the motor and sheave. Elevators are low speed, high torque applications, so gearboxes are used to allow higher speed, lower torque motors to be used. A variety of rope types, sheave designs, gear types, and AC or DC motors are employed in several configurations by suppliers to constitute the actual machine. The Geared Traction Elevator is the most widely installed type worldwide. It services an extremely wide range of performance and building floor requirements.
Traction Gearless Elevators
The Traction Elevator derives its name from the fact that traction, between the ropes attached to the car and the motor driven sheave, is how torque is transmitted to move the car.
In the Traction Gearless Elevator, a very special, slow speed, high torque motor and the hoistway sheave are either on a common shaft or directly connected. No gear is used. A variety of rope types, sheave designs and AC or DC motors are employed in several configurations by the suppliers to constitute the actual machine.
Historically this type of machine had been used exclusively in high-rise, high performance elevators.
Hydraulic Elevators
The Hydraulic Elevator utilizes a hydraulic cylinder and piston as the means of moving the actual car. A variety of cylinder configurations and controls are available from the suppliers. The hydraulic elevator is widely used when only a few floors exist in the building.
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