The company has a group of cooperation teams engaged in the working principle of hydraulic jack industry for many years, with dedication, innovation spirit and service awareness, and has established a sound quality control and management system to ensure product quality.
Hydraulic lifts work on a basic principle: to go up, a pump pushes oil into the cylinder, pushing the piston (which pushes the lift car) up. To go down, the valve opens and oil is allowed to flow back into the reservoir, and is pushed back using the gravitational force of the lift car. The diagram above shows this system.
When the valve is closed, the oil can only go from the reservoir into the cylinder. When the valve is open, the oil can only flow from the cylinder back into the reservoir.
The controls in the lift car make the pump operate, moving the oil. When a floor is reached, the pump is switched off and the lift car sits on top of the piston, held in position by the oil which is trapped in the cylinder.
The position, size and operation of the cylinder can be one of two options – ‘holed’ or ‘hole-less’.
A holed hydraulic lift is a conventional hydraulic lift. ‘Holed hydraulic’ refers to the hole required in the floor for the lift. The cylinder which encases the piston and pushes the lift car extends into the ground. The distance this extends is equal to the distance the lift car can travel upwards.
A hole-less hydraulic lift means no need for a deep pit for the cylinder. The pistons are direct action, and are mounted on the floor of the pit in line with the bottom corners of the lift car. The system operates like a jack, and restricts travel to around 20-30m at most. This is not as common but allows for use where space is restricted going down, travel is short and a hydraulic system is required.
If you have any questions on working principle of hydraulic jack. We will give the professional answers to your questions.