Browse Prior Art Database

Reservoir for Continuously Lubricated Magnetic Disk System

IP.com Disclosure Number: IPCOM000101333D
Original Publication Date: 1990-Aug-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 3 page(s) / 87K

Publishing Venue

IBM

Related People

Greaves, HR: AUTHOR

Abstract

Disclosed is a design enhancement to the method of lubrication control of disk surfaces of magnetic disk files, as described in European Patent Application 302 606 A2. By changing components in the airflow passage between disks and lubrication source, the necessary temperature difference required by the lubrication system can be controlled easily over a range of parameters by means of alternative circular standard-sized parts. Fig. 1 shows the above-referenced disk cover, and Fig. 2 shows the disclosed alternative design.

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Reservoir for Continuously Lubricated Magnetic Disk System

       Disclosed is a design enhancement to the method of
lubrication control of disk surfaces of magnetic disk files, as
described in European Patent Application 302 606 A2.  By changing
components in the airflow passage between disks and lubrication
source, the necessary temperature difference required by the
lubrication system can be controlled easily over a range of
parameters by means of alternative circular standard-sized parts.
Fig. 1 shows the above-referenced disk cover, and Fig. 2 shows the
disclosed alternative design.

      One of the means of meeting the desired level of lubrication on
the disk surface of a file using the continuous re-lubing method of
the reference is by the maintenance of a specific temperature
difference between the spinning disks of the file and a reservoir of
the lubrication agent.  This disclosure allows the required
temperature difference to be met.  It also has design parameters that
can be easily changed so that the file can operate in user systems
with different efficiencies for file cooling.  The design has three
components:
      i)   low surface energy treated heatsink 1
      ii)  low surface energy thermal insulation 7, e.g.,
           PTFE
      iii) unsaturated for absorbing media 6 for holding a
           reservoir of lubricant, e.g., HEPA.

      The heatsink 4 is insulated from the casting 2 by resting on
the holder 7 with the media 6 trapped between them all inside.  Thus,
there is a thermal break between the file casting 2 and heatsink 1.
The holder 7 has two gates 3 cut on a radius from the imaginary
center of the spindle. The...