Features of pneumatic systems 2

Characteristics of pneumatic system 2

1. Characteristics of actuator

Pneumatic execution Components include air cylinder, swing cylinder and air motor. Pneumatic actuator components have the following characteristics:

1) Basic motion (linear, swing and rotation) is easy to implement.

2) A variety of sports are easy to combine.

3) Movement parameters (force, speed, direction) are easy to control.

4) There are many varieties and a wide range of sizes, making it easy to design and choose.

5) Long service life, safe, reliable and sensitive.

6) Easy to operate and install, with high debugging requirements.

The cylinder is the most important executive component in the pneumatic system. Because the cylinder is low in price, easy to install, has a simple and reliable structure, and has components of various sizes and effective strokes available, it has become a Important linear drive components. Cylinders generally have the following characteristics:

· Diameter range: 6-320 mm

· Effective stroke: 1-2000 mm

· Piston rod output force: 2 —50000 N

· Piston speed: 0.02—1 m/s

2. Characteristics of pneumatic control systems

Pneumatic control systems usually use the following methods to control pneumatic equipment:

1) Use pure pneumatic control: This method is suitable for those that cannot be controlled electrically occasion. For example, the control system of magnetic head processing equipment, non-static equipment, etc. is completely composed of pneumatic logic valves, pneumatic directional valves, and manual control valves. This kind of purely pneumatic control system has complex gas circuits and difficult maintenance. This method is generally not used in situations where electronic control can be used.

2) Electro-pneumatic control system: This method is suitable for simple pneumatic system control. If the pneumatic system of the equipment only consists of 3 to 4 cylinders, and the logical relationship between the mutual actions is simple, this control method can be used. Since the control system uses a conventional relay-contact control system, it is suitable for situations where the control system is not highly complex.

3) PLC control system: This is currently the most common control method for pneumatic equipment. Since PLC can handle quite complex logical relationships, it can control pneumatic systems of various types and complexity. And because the control system adopts software programming method to realize the control logic, the logical function of the gas system can be changed by changing the software, thereby increasing the flexibility and reliability of the system.

4) Network control system: When the complexity of the system continues to increase and each device needs to communicate with each other to coordinate actions, a network control system is needed.