Working principle
There is only one piston chamber inside the single-acting cylinder, one of which is connected with the air source, called the air inlet; The other port is connected to the atmosphere by a valve or external load, called the exhaust port. When a source of air is supplied to the piston chamber, the piston moves outward and generates thrust. When the air supply is stopped, usually by the action of a spring or an external load, the piston will return to its initial position.
Structural composition
Spring return type: mainly composed of piston, cylinder, front and rear end cover, piston rod, spring, pull rod, seal ring and so on. One end of the cylinder is driven by compressed air, the other end is connected with the atmosphere, and the reset is driven by a spring.
Diaphragm type: mainly composed of diaphragm, piston and cylinder. The piston moves through the diaphragm deformation, does not need the sealing ring to seal, its acting area is large, the driving force is large, but the stroke is generally small, often used in clamping occasions, the piston return is driven by external force 6.
Airbag type: The main component is the airbag, the stroke is larger than the diaphragm type cylinder, but because the cylinder has no guide, the guidance problem should be considered when used in the equipment.
peculiarity
Advantages: The structure is relatively simple, mainly composed of cylinder, piston, piston rod and seal, etc., the connection and control system is also relatively simple. Control is relatively easy, just control the supply and stop of the air source. Manufacturing costs are usually lower.
Disadvantages: the driving force will be partially offset by the spring when moving forward, and the general single-acting spring return cylinder stroke can not be too long. Due to the installation of spring and other components in the cylinder, the effective stroke is smaller than that of the double-acting cylinder of the same volume. The tension of the cylinder return spring changes with the size of the deformation, and the output force of the piston rod changes during the process of travel.
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