Spindle Seal for Self-Pressurized Head/Disk Assembly
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03
The contamination of a head/disk assembly (HDA) from the flow of air through spindle bearings may be reduced by the arrangement shown in the figure. In addition, bearing failure as a result of bearing grease dehydrating and migrating may be minimized. The arrangement shown is an improvement over the air circulation system shown and described in [*]. Outside contamination and bearing grease particles may be prevented from entering the head/disk assembly through the spindle bearings by pressurizing the HDA relative to the surrounding atmospheric pressure to insure the air flow from the disk enclosure to the outside. This, however, requires a source of clean makeup air.