What are Single Acting and Double Acting Cylinder
In one of the previous articles “Type of Hydraulic Cylinders”, we have mentioned that according to the action of hydraulic pressure, we divide hydraulic cylinders into single acting and double acting cylinder. To make it detailedly, we’ll elaborate on their definitions and differences.
A single acting hydraulic cylinder refers to a cylinder that only inputs hydraulic oil from one side of the piston and moves in one direction. Meanwhile, the piston can only be reset by means of a spring or the weight of the piston or an external force. The single acting hydraulic cylinder basically has only one effective area of action. Only one end of the two chambers of this cylinder has oil, and the other end is in contact with air. According to the technical structure, they can only generate thrust. Therefore, their application fields is mainly lifting equipment such as lifting platforms, lifting machinery and lifting machinery.
Double acting hydraulic cylinder refers to the movement of inputting pressure oil from the upper and lower ends of the cylinder piston, therefore, it can make the cylinder reach extension and retraction. The hydraulic system is used as the hydraulic oil return device, and the hydraulic oil is used as the actuator. It converts the liquid pressure into rapid , controllable linear motion or force to drive the load.
The difference between single acting and double acting cylinder are as follows:
- A single acting hydraulic cylinder means that the movement in one direction is realized by oil pressure, but the return depends on external forces such as dead weight or springs. Only one end of the two chambers of this cylinder has oil, and the other one end is in contact with air.
- A double acting hydraulic cylinder means that both chambers have oil, and realize the movements in both directions by oil pressure.