Study of Oil Film Characteristics of Ultra-high Speed Liquid Hybrid Bearings Considering Fluid-solid Coupling Effect
Consider the influence of the viscosity temperature effect of lubricating oil on hybrid bearings,the oil-film-shaft fluid-structure coupling model of ultra-high-speed liquid hybrid bearing was established,the pressure and tempera-ture fields of the oil film of the hybrid bearing were obtained by solving the continuity equation,energy equation and Navier-Stokes equation with computational fluid dynamics(CFD)method.The two-way fluid-structure coupling analysis method was used to calculate the hybrid bearing,and the effect of bearing elastic deformation on the oil film characteristics was an-alyzed.The results show that the oil film pressure and maximum deformation of the hybrid bearing increase with the in-crease of speed and oil supply pressure,and increasing the oil supply pressure can intensify the flow of lubricating medi-um,thus reducing the oil film temperature to a certain extent.After considering the effect of fluid-structure coupling,the actual bearing load capacity and oil film pressure of the hybrid bearing are reduced to a certain extent.
hybrid bearingfluid-structure couplingelastic deformationviscous temperature effectoil film characteristics
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