Gear box elevators
Gearbox Elevators are a type of elevator system that uses a gearbox as part of the hoisting mechanism. These elevators are typically powered by a motor connected to a gearbox, which drives the elevator’s hoisting cable or chain.
Key Features:
- Mechanism: The gearbox connects the motor to the drive sheave (pulley) and controls the speed and torque of the elevator.
- Types:
- Geared Traction Elevators: Use a worm gear to control movement, suitable for mid-rise buildings with moderate speed requirements.
- Hydraulic Elevators with Gear Systems: Found in some designs, where a gear system aids the hydraulic pump for low-rise applications.
- Speed and Height: Typically slower than gearless elevators, with a maximum speed of about 500 feet per minute (2.5 m/s). Best suited for buildings up to 250 feet (about 75 meters) in height.
- Cost-Effectiveness: Lower upfront costs compared to gearless elevators, making them a good choice for low- and mid-rise buildings.
Advantages:
- Reliable and durable for moderate use.
- Easier to repair due to mechanical simplicity.
- Lower initial cost compared to advanced systems like gearless elevators.
Disadvantages:
- Higher energy consumption compared to modern alternatives.
- Generates more noise and vibration due to mechanical parts.
- Requires regular maintenance for the gearbox and motor components.
Gearbox elevators are gradually being replaced by gearless and machine room-less systems in modern buildings due to their limitations in efficiency and noise levels.
