MR / MRL
Electric Elevators ( with Machine Room)
Geared Traction Elevators
As classical type of traction elevators have a gearbox which is attached to the electric motor and turns the hoist sheave and moves the rope. Geared traction elevators are driven by either direct current (DC) or alternating current (AC) and their maximum speed is up to 500 ft. per minute. This speed limit is lower than gearless traction elevators but higher than many other types of elevators.
many people choose these system for their ability of traveling to a maximum distance of 250 ft. They are also they have fair installation and maintenance costs, and low energy consumption. While their speed is slower than gearless elevators, geared elevators offer advantages in terms of energy efficiency as they use less power to turn the pulley (sheave). Furthermore, these elevators have the ability to lift loads up to 13600 kg.
Machine Room less Elevator, MRL Elevators, MRL Lifts, Gearless Traction Elevators
These traction elevators have the wheel directly attached to the electric motor. Gearless traction elevators have a very high travel speed i.e. up to 2000 ft. per minute and can travel a great distance. Their maximum travel distance is almost 2000 ft. and thus they are the best and the only choice for high-rise buildings. These elevators had the ability to be employed in all kinds of buildings of any height and had a much higher speed than other hydraulic elevators. The gearless traction system, since then, has proven to be so durable that even today it is the best and most reliable option available for high-rise applications. These elevators function using a wire cable (hoisting ropes) which is attached to the elevator top and wrapped around the sheave on one end. The other end of the cable is attached with a counterweight that raises and lowers in the hoist way. The weight of the cab and counterweight together press the cable which then turns the sheave and the elevator begins moving. To keep the load on the electric motor minimum, the counterweight is matched with the weight of the elevator cab and half-load of the passengers. As the elevator cab moves upwards, the counterweight begins to move downwards, and in this way, it balances the elevator load. This significantly reduces the energy consumption as the motor only bears the weight of half the cab load.