Browse Prior Art Database

Novel Spacer-Ring Design for Improved Air-Flow and Cooling in Disk-Files

IP.com Disclosure Number: IPCOM000116217D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Nayak, J: AUTHOR

Abstract

Disclosed is the design of disk-file spacer rings with vanes, (Figs. 1A and 1B) for improved air-flow and cooling. These vanes could be either radial or forward-curved or backward-curved with respect to the direction of spindle-rotation. These vanes can be provided with or without vent holes on the spacer-rings.

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Novel Spacer-Ring Design for Improved Air-Flow and Cooling in Disk-Files

      Disclosed is the design of disk-file spacer rings with vanes,
(Figs. 1A and 1B) for improved air-flow and cooling.  These vanes
could be either radial or forward-curved or backward-curved with
respect to the direction of spindle-rotation.  These vanes can be
provided with or without vent holes on the spacer-rings.

      The rotation of the disk-file spindle imparts greater kinetic
energy to the inter-disk air due the disclosed addition of vanes to
the spacer-rings, resulting in a greater amount of circulation of air
inside the disk-file.  The presence of vanes imparts both tangential
as well as radial velocity to the air.  The radial component can be
further enhanced and optimized by the curvature and shaping of the
vanes.

      This increased flow results in improved purging of the
inter-disk air and greater circulation past the internal filter of
the disk-file.  This ensures a cleaner interface between the head and
disk resulting in improved interface life for the file.

      Furthermore, the increased flow results in increased convective
heat transfer from the spindle and enclosed spindle-motor providing
improved cooling leading to a) Improved life of spindle bearings and
motor, and b) Reduction in Track Misregistration due to thermal
expansion
facilitating improvements in track density.