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Views: 112 Author: Site Editor Publish Time: 2022-07-26 Origin: Site
Pneumatic control technology is closely integrated with sensor technology and electronic information technology. This has developed into automation technology including control, transmission and detection. Now it has developed into an important part of the field of automation.
Pneumatic control technology is widely used in industrial machines such as processing and manufacturing, automobile industry, electronics and home appliance industry, packaging automatic line, robot, assembly, painting, wall climbing, welding and so on. The brake device and door opening and closing device of the vehicle also adopt pneumatic control technology. In addition, all kinds of pneumatic tools also use pneumatic technology.
Pneumatic systems use compressed gas as a working medium to transmit power through the interaction of various components. A complete pneumatic system consists of four main parts: executive components, control components, pneumatic auxiliary components and compressed air generators.
Cylinder is an executive element in the pneumatic system, it can convert gas pressure energy into mechanical energy and complete related actions. It includes a cylinder for linear reciprocating motion, a pneumatic motor for continuous rotary motion and a swing motor for discontinuous rotary motion. In more detail, cylinders are divided into single acting air cylinder, double acting air cylinder, telescopic pneumatic cylinder and pneumatic cylinder with hollow piston rod.
Air is available everywhere, and the inexhaustible availability saves the cost of buying, storing, and transporting media. The used air is directly discharged into the atmosphere without pollution to the environment. There is no need to set up a recovery pipeline, so there is no problem of medium deterioration, supplementation and replacement.
Because the air viscosity is small (about one ten thousandth of hydraulic oil), the flow resistance in the pipe is small, and the pressure loss is small, which is convenient for centralized air supply and long-distance transportation. Even if there is a leak, it will not pollute the environment like hydraulic oil.
Compared with hydraulic transmission, the pneumatic response of air gripper pneumatic cylinder is quicker and the action is rapid. Maintenance is simple. The pipeline is not easy to be blocked.
Pneumatic components are simple in structure, easy to manufacture, and suitable for standardization, serialization and generalization.
The pneumatic system has good adaptability to the working environment. Especially when working in harsh working environments such as flammable, explosive, strong magnetism, radiation, vibration, etc., its safety and reliability are better than hydraulic, electronic and electrical systems.
The air is compressible, so that the pneumatic system can realize automatic overload protection, and it is also convenient for the gas storage tank to store energy in case of urgent need. Accordingly, the applied cylinders include spring loaded pneumatic cylinder, compressed air cylinder and hydraulic air cylinder.
The temperature of the gas decreases due to expansion during exhaust. Therefore, the pneumatic equipment can automatically cool down, and the air cylinder components will not overheat after long-term operation.
Pneumatic systems are used in household equipment, medical environments, transportation and industrial plants. Products mainly include air brakes (truck, bus and train), dental equipment, jackhammers and road drills required for civil construction projects, automated production equipment, and HVAC control.
