Suppression of resonance amplitude of disk vibrations by squeeze air bearing plate

This article investigates the effect of suppressing the vibration of a spinning disk/spindle system by applying a squeeze filmm damping between the spinning disk and squeeze air bearing plate. The out-of-plane and in-plane vibrations of a 5-platter disk/spindle system were measured with and without a squeeze air bearing and illustrated by a Campbell diagram. When the squeeze air bearing plate with angular length of 180/spl deg/ and radial length of 20 mm was used at 0.120 mm clearance, the largest resonance amplitude of the out-of-plane disk vibration decreases less than one third. The disk flutter caused by the surrounding air flow could be perfectly suppressed. It was also found that the suppressing effect of the out-of-plane vibration can decrease proportionally to the in-plane vibration.