早在六十年代,就已采用低温透平膨胀机进行氦的液化。大型氦液化设备采用油轴承透平膨胀机,而小型氦液化器则采用气体轴承透平膨胀机。气体轴承透平膨胀机自从投入使用以来,已在许多方面获得了改进,例如提高了效率,增大了功率,以及在工业上的应用等。 As early as the sixties, liquefaction of helium has been carried out using a cryogenic turbo-expander. Large helium liquefaction equipment using oil-bearing turbine expander, and small helium liquefier gas bearing turbo expander. Gas bearing turbo-expander has been improved in many aspects since it was put into operation, for example, improving efficiency, increasing power, and industrial applications.