The role of a single action pneumatic actuator
In fact, the pneumatic and electrical systems of a single pneumatic actuator are not mutually exclusive. The utility model has the advantages of simple structure, convenient maintenance and fast linear circular movement. Can also be used in a variety of harsh working environment, such as explosion-proof requirements, dust or damp working environment. But the servo motor drive has the advantages of fast force and accurate positioning. Electric drive is the perfect choice for precision, synchronous operation and adjustable positioning programming. The electrical system composed of closed-loop position controller servo system or stepper motor can make up for the shortage of pneumatic system.
Taking the application of single acting pneumatic actuator in spring resetting as an example, the selection of single acting pneumatic actuator is illustrated. The output torque is obtained during two different operations. Each operation produces two different torque values depending on the stroke position. The output torque of the spring reset actuator is obtained by multiplying the force (air pressure or spring force) by the moment arm: the output torque is obtained by compressing the spring into the middle chamber and is called "pneumatic stroke output torque". In this case, the air pressure forces the piston to move from 0 to 90 degrees, the spring compresses to produce a reaction force, and the torque gradually decreases from the starting large value to the second case: the output torque is the result of the restoring force acting on the piston as the spring restoring force acts on the discharge. In this case, the output torque is reduced from 90 degrees to 0 degrees due to the extension of the spring, and the design of the single-acting actuator is based on the balanced torque generated in the two cases. In each case, by varying the relationship between the number of springs and the air source pressure (e.g., two springs and five springs on each side).5 Bar air source and vice versa) two conditions can be obtained in the spring return application: degas open or degas closed. The safety factor of the spring reset actuator is 25-50%, which is used as a physical means of the reaction device for multifrequency ultrasonic extraction and synthesis. It is mainly used to explore the compound comparison experiment of molecular cleaning and cracking of different substances by ultrasonic wave with different frequencies and different powers, and obtain new reactions and substances by specific means.
