Pneumatic actuator | classification principle | structure

Pneumatic actuator is a kind of high security in the actuator. In the process of production control with high safety requirements, pneumatic actuator is often used. According to the different types of action, the pneumatic actuator can be divided into single acting pneumatic actuator and double acting pneumatic actuator. Pneumatic actuator's switch action is completed by gas source drive, namely double acting pneumatic actuator, and only the opening action is driven by gas source, and the shutdown as a spring reset is a single action pneumatic actuator.


[principle of double acting pneumatic actuator]

The pneumatic actuator with double action completes the switch action under the drive of the gas source power. The compressed air enters the pneumatic actuator from the nozzle of the pneumatic actuator, and the gas moves the piston to the two ends. The rack drives the gear on the rotary shaft to rotate, thereby opening the valve. When the pneumatic actuator is closed, the gas source is entered from the reverse tube, pushing the piston forward to the middle, and driving the valve to close. Double acting pneumatic actuator


[principle of single acting pneumatic actuator]

The single action pneumatic actuator is driven by gas source power, and the opening process is basically the same as that of the double action pneumatic actuator. However, the reverse pipe nozzle of the single action pneumatic actuator is the exhaust port and the compressor is not the inlet. The closing action of the single action pneumatic actuator is done by the spring power to drive the valve. Single action of pneumatic actuator


[the structure of pneumatic actuator]


The actuator and regulating mechanism of pneumatic actuator are unified. The components of actuator can be selected as thin film, piston or rack and pinion, and rack and pinion is the most commonly used. The gear and rack actuator has a compact structure, large output driving force, stable and reliable action, and is the most balanced performance in the three actuator components.