The lubrication characteristics of floating ring bearing oil films vary with the number of oil holes on the floating ring,so as to affect the vibration characteristics and stability of the rotor.Based on the flow continuity equation and bearing lubrication theory,the oil film governing equation of floating ring bearing was derived,and the relationship between the number of oil holes and the lubrication characteristics of floating ring bearing was revealed.With the turbocharger floating ring bearing of a certain type of gasoline engine as an example,the finite element model of floating ring bearing was established.The lubrication characteristics of oil films were analyzed based on CFD method,and the influence of different number of oil holes of the maximum pressure,bearing capacity and dynamic characteristic coefficient of floating ring bearing was studied.The results show that when the number of oil holes of the floating ring increases from 2 to 8,the maximum pressure of the inner and outer oil film,the bearing capacity of the outer oil film and the dynamic characteristic coefficient of the oil film decrease,while the bearing capacity of the inner oil film increases.With the increase of rotational speed,the bearing capacity of the inner oil film decreases gradually when the number of oil holes is 2,and it has no obvious change when the number of oil holes is 4,but it increases when the number of oil holes is 6 and 8.The higher the rotational speed becomes,the greater influence the oil holes can have on bearing capacity.On the contrary,the higher the rotational speed gets,the smaller influence the oil holes can have on the maximum pressure and dynamic characteristic coefficient.