What are the advantages and disadvantages of pneumatic transmission?

Advantages are as follows:

1. With air as working medium, it is easy to obtain working medium. The used air is discharged into the atmosphere and handled conveniently. Compared with hydraulic transmission, it is unnecessary to install recycled oil tank and pipeline.

2. Because the viscosity of air is very small (about one thousandth of the dynamic viscosity of hydraulic oil), its loss is also very small, so it is convenient for centralized gas supply and long-distance transportation. The external leakage will not pollute the environment as seriously as the hydraulic transmission.

3. Compared with hydraulic transmission, pneumatic transmission has the advantages of quick action, quick reaction, simple maintenance, clean working medium, and no deterioration of medium.

4. Good adaptability to working environment, especially in flammable, explosive, dusty, strong magnetic, radiation, vibration and other harsh working environment, superior to hydraulic, electronic and electrical control.

5. Low cost, automatic protection of overload.

Shortcomings are as follows:

1. Because of the compressibility of air, the stability of working speed is slightly poor. But the gas-liquid linkage device will get a satisfactory result.

2. The total output force should not be greater than 10-40 kN because of the low working pressure (generally 0.31 MPa) and the unfavorable size of the structure.

3. Noise is high. Mufflers should be added when exhausting at high speed.

4. The speed of gas signal transmission in pneumatic devices is slower than that of electrons and light. Therefore, pneumatic control system should not be used in complex circuits with too many series of components.