新型动压箔片径向气体轴承低温透平膨胀机的开发

Study of New Aerodynamic Foil Journal Bearing For Cryogenic Turboexpander

针对一台40Nm3/h的空气低温透平膨胀机,设计了一种新型弹性支承箔片径向气体轴承。并对该透平膨胀机的机械性能做了大量试验,试验获得最大转速为220000r/min。试验表明,该箔片动压气体轴承低温透平膨胀机具有很好的运转稳定性,对进一步开发我国自己的全动压气体轴承低温透平膨胀机具有重要的意义。

The new aerodynamic foil journal bearing with elastic support was developed for a 40 Nm3/h air turboexpander.The bearing can support the rotor revolving at a high speed of 22×104 r/min.It is shown that this foil bearing has very good stability and will be used more widely in cryogenic turboexpander.