The hydraulic elevators are divided into two groups with shaft and without shaft. The hydraulic elevator with shaft has a pulley rope at the bottom of the elevator shaft, which receives the collected piston when the elevator descends. But the hydraulic elevator without a shaft has a piston on both sides of the cabin, which is divided into three categories: rope hydraulic elevator, telescopic hydraulic elevator and non-telescopic hydraulic elevator.
Benefits of hydraulic elevators
• The existence of the engine room at the bottom • Ability to lift heavy loads • No need for a well roof • Safety in motion • Softness of movement • Accuracy in stopping at the level of the floors Ventilation of the engine room of the hydraulic lift and especially keeping the hydraulic oil cool is also one of the important points. There are other reasons for choosing a hydraulic lift: • Suitable for low-rise buildings, and quick installation of this elevator • Its more reasonable price compared to other types • Provision of replacement parts and non-exclusivity of parts • Easier service and maintenance due to limited parts • Suitable for high capacities • Less sensitivity to accidents and electrical connections • The possibility of increasing the speed in the downward direction and not having to spend money at this time, because the gravity of the earth is the main factor of downward movement. • Low cost of equipment and repairs (15% to 25% compared to traction elevator) • Specialists are not needed in case of breakdown and trapped passengers • Suitable for old buildings
