Actuator Single Acting

The selection of single-acting actuators takes SR series pneumatic actuators as an example. In the application of spring return, the output torque is obtained in two different operation processes. According to the stroke position, each operation generates two different torque values. The output torque of the spring return actuator is obtained by multiplying the force (air pressure or spring force) by the force arm. In this case, the air source pressure forces the piston to turn from 0° to 90° position. Due to the reaction force generated by the compression of the spring, the torque gradually decreases from the maximum value at the starting point until it reaches the second condition: the output torque is that the spring recovers when the middle cavity loses air. The force acting on the piston is called "spring stroke output torque". In this case, due to the elongation of the spring, the output torque gradually decreases from 90 degrees to 0 degrees. As mentioned above, the single-acting actuator is based on two It is designed on the basis of generating a balance moment under such conditions.