NUMERICAL ANALYSIS OF THE LUBRICATION PERFORMANCES FOR ULTRA-THIN GAS FILM LUBRICATION OF MAGNETIC HEAD/DISK WITH A NEW FINITE DIFFERENCE METHOD

摘要

In the present paper, a new iterative algorithm of finite difference method to numerically solve the lubrication problems of magnetic head/disks under ultra thin gas film thickness is introduced. Pressure distributions are calculated when a slider deviates slowly or abruptly from the balance position due to perturbations. The results show that when the slider moves in the film thickness direction, the pressure always tends to force the slider back to the balance position. Steady flying simulations show that the pitch angle is the sensitive parameter to the load carrying capacity of the slider, which should be carefully controlled in design. Squeeze effect is apparent when abrupt movements or rotations happen, which can avoid, to some extent, fatal damages due to vibration or uncertain interferences.