Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Spindle Seal for Self-Pressurized Head/Disk Assembly

IP.com Disclosure Number: IPCOM000042286D
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Davis, RA: AUTHOR [+2]

Abstract

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.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 76% of the total text.

Page 1 of 1

Spindle Seal for Self-Pressurized Head/Disk Assembly

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. The air flow, as described in [*], may be reversed to accomplish the same result with the additional advantage of a self-pressurizing HDA if the arrangement shown in the figure is employed. The flow designated by arrow F of the integral cooling fan generates a high pressure area A. There is a vent V1 with an absolute filter AF included that leads from the high pressure area A to a channel B in the upper bearing clamp C. The upper bearing clamp C has a labyrinth seal S included to the spindle shaft SS and is within close proximity to the disk hub base D. All four sides of the spindle bearings SB are vented to atmospheric pressure by bypass vents V2. The base of the disk hub D spinning close to the upper bearing clamp C causes air to flow through the...