What is a Hydraulic Elevator?
Hydraulic elevators use hydraulic fluid to move the elevator car up and down. A pump pushes oil into a cylinder, which raises a piston connected to the elevator car. This type of elevator is commonly found in low to mid-rise buildings with fewer than eight stories, such as apartments and offices. Although slower than traction elevators, hydraulic elevators are energy-efficient, affordable, and offer a quieter, smoother ride.
How Do Hydraulic Elevators Work?
Hydraulic elevators operate by pumping hydraulic oil into a cylinder to move a piston, which lifts the elevator car. When descending, the oil is released back into the reservoir. The elevator’s speed depends on the size of the oil pump and piston, making it ideal for buildings up to five or six stories.
Types of Hydraulic Elevators
- Holed Hydraulic: Uses underground cylinders to lift the elevator.
- Holeless Hydraulic: No drilling required; jacks are located above ground.
- Roped Hydraulic: Combines cables and pistons for smooth movement without deep digging.
Advantages
Hydraulic elevators are cost-effective, energy-efficient, quiet, and easy to maintain. They also take up less space with machine room-less options.
Disadvantages
Their use is limited to low-rise buildings, and they can be affected by temperature fluctuations or oil leaks.
