Abstract：The unitized dynamics model of journal and floating ring for the journal floating ring hydrostatic/hydrodynamic bearing was established. The stability criterion of the journal floating ring bearing was obtained using Routh-Hurwitz method. The stiffness and damping coefficients under different rotational speed and eccentricity for a high speed floating ring bearing were calculated with finite element method. On this base the variation of threshold speed with eccentricity was acquired. The results show that floating ring bearing has excellent stability and the threshold speed increased quickly with the eccentricity increment. The research fruits have great value in the model integrality and stability analyse of journal floating hybrid bearing.
2012, Vol. 31 
