The so-called gas-lubricated bearings refer to interactive bearings that use gas lubricants for lubrication. Our common gas lubricant is air. During use, the mechanism of the gas-lubricated bearing to form a bearing gas film is the same as that of the liquid-lubricated bearing. Therefore, gas-lubricated bearings have the following advantages when used.

Advantages of gas-lubricated bearings

    1. High precision　

      The gas film has the effect of homogenizing the error, its accuracy is two orders of magnitude higher than that of the rolling bearing, and it has low vibration and low noise.

    2. High speed　

      The speed of the small helium turboexpander has reached 650 000r/min, the linear speed is 238m/s, and it has reached 455x106mm·r/min calculated by the dn value.

    3. Low friction loss　

      The gas viscosity is only one thousandth of that of the lubricating oil, so the friction torque caused by the friction in the gas film is three orders of magnitude lower than that of the oil film.

    4. Wide applicable temperature range, capable of antigen radiation

      The high temperature resistance can reach 300-500℃, and the gas bearing can still work when the temperature is as low as 10K.

    5. Long life

      The aerostatic bearing has no direct metal contact, and its theoretical life is infinite. Considering other conditions, it should generally be above 104h. There is metal-to-metal friction at the start and stop of the dynamic pressure gas bearing, and its life is affected to a certain extent.

    6. No pollution

      The lubricating gas is generally air or inert gas, which will not cause pollution when discharged into the atmosphere. The bearing has low vibration and low noise, and does not pollute the environment.