1151visitsPneumatic joint A component that performs work through the pressure or force generated by the expansion of a gas, that is, a device that converts the elastic energy of compressed air into kinetic energy. Such as cylinders, air motors, steam engines and so on. Pneumatic element is a form of power transmission, also an energy conversion device, using gas pressure to transfer energy.
advantage
1, pneumatic device structure is simple, light, simple installation and maintenance. The medium is air, which is not easy to burn compared with the hydraulic medium, so it is safe to use.
2, the working medium is inexhaustible air, air itself does not cost money. Exhaust treatment is simple, does not pollute the environment, low cost.
3. The adjustment of output force and working speed is very easy. The operating speed of the cylinder is generally less than 1M/S, which is faster than that of the hydraulic and electrical methods.
4, high reliability, long service life. The number of effective operations of electrical components is about one million times, while the general life is greater than 30 million times, and some good quality valves exceed 200 million times.
5, the use of air compressibility, can store energy, to achieve centralized gas supply. The energy can be released for a short time to obtain a high-speed response during intermittent movement. Buffering is possible. Strong adaptability to load and overload. Under certain conditions, the pneumatic device can be self-sustaining.
6, full pneumatic control with fire, explosion-proof, moisture-proof ability. Compared with the hydraulic method, the pneumatic method can be used in high temperature situations.
7. Compressed air can be supplied centrally and transported remotely.
shortcoming
1, due to the compressibility of the air, the speed of the cylinder is susceptible to changes in the load. The method of gas-liquid linkage can overcome this defect.
2. When the cylinder is moving at low speed, due to the large proportion of friction in the thrust, the low-speed stability of the cylinder is not as good as that of the hydraulic cylinder.
3, although in many applications, the output force of the cylinder can meet the working requirements, but its output force is smaller than the hydraulic cylinder.
Pneumatic technology is a professional technology to drive and control machinery with compressed air as the medium. Because it has the advantages of energy saving, no pollution, high efficiency, low cost, safety and reliability, simple structure, etc., it is widely used in various machinery and production lines. In the past, the pneumatic system and its components on the production line of automobiles and tractors were designed, manufactured and maintained by each factory.
