A STUDY ON THE CHARACTERISTICS OF EXTERNALLY PRESSURIZED AIR BEARINGS

In this study the direct numerical method is applied to solve the pert urbed Reynolds' equation. To solve it the perturbed dimensionless mass flow rate is used as the boundary condition under the inherently comp ensated restrictor. The dynamic characteristics of a rotor supported i n the externally pressurized air bearings, such as stiffness and dampi ng coefficients, are analyzed, and as a result the orbit of the journa l center due to rotating unbalance force is calculated. The diameter o f the orbit has been experimentally determined based on the three-poin t method. The maximum difference between the measured and calculated d iameters was less than 5%.