Abstract:

In this paper , the finite difference theory is adopted to obtain a discrete modified Reynolds equation of the gas , and the shear flow is used as the iterative leading term to obtain the pressure distribution of an ultra-thin gas-film lubrication bearing. Then , by varying the initial working parameters of the magnetic head , such as the flying height of the gas film , the initial pitch angle and the rotational speed of the disk , the parameters describing the
static flying characteristics of the bearing are calculated , including the gas-floating force , the pitch moment , as well as the maximum and minimum gas-floating forces. Moreover , the influences of the initial working parameters on the static flying characteristics are analyzed in detail. Calculated results indicate that , with the decrease in the flying height and the initial pitch angle , the stiffness of the gas-film lubrication bearing improves , and that the effect of rotational speed on performance parameters in constant flying height is similar to that in constant pitch angle.

Key words: magnetic head/disk, aerodynamic bearing, numerical analysis, flying attitude, static performanc