Browse Prior Art Database

Device to Rectify the Unfiltered Reverse Flow for Sealed Rigid Disk Files

IP.com Disclosure Number: IPCOM000105856D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Chang, C: AUTHOR [+4]

Abstract

Disclosed is a method and an apparatus for rectifying the contaminated airflow moving from the actuator (ACT) region to the disk enclosure (DE) area. The movement of th unfiltered airflow from ACT to DE, the reverse flow, has been identified as detrimental to the reliable operation of the HDA in the past. Airflow studies have shown that it is effective in blocking the reverse flow by placing flow obstacles at the ACT/DE interface.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 67% of the total text.

Device to Rectify the Unfiltered Reverse Flow for Sealed Rigid Disk Files

      Disclosed is a method and an apparatus for rectifying the
contaminated airflow moving from the actuator (ACT) region to the
disk enclosure (DE) area.  The movement of th unfiltered airflow from
ACT to DE, the reverse flow, has been identified as detrimental to
the reliable operation of the HDA in the past.  Airflow studies have
shown that it is effective in blocking the reverse flow by placing
flow obstacles at the ACT/DE interface.

      A device, reverse-flow rectifier, was designed and installed
according to the principle outlined above.  The reverse-flow
rectifier is constructed in the form of a comb, as shown in the
Figure.  On installation, the fingers of the rectifier are positioned
at an equal distance from the adjacent arms with the operation; the
rectifier assembly is attached to the base structure of the HDA.  The
rectifier is placed at the interface between ACT and DE, meaning the
plane containing the fingers is coincidental to the interface between
ACT and DE.  The height (in the direction of the spindle axis) of the
fingers should be kept as large as possible, without interfering with
the merge/demerge operation and arms seeking of the HDA.  The length
of the fingers should be kept as long as possible, without making
contact with the wall of the shroud opening at the interface between
ACT and DE.

      Flow visualization was performed on an HDA equipped with an...