Browse Prior Art Database

Heat Pipe Cooling of a Rotary Carbon Vane Compressor to Increase the Life of the Compressor

IP.com Disclosure Number: IPCOM000107501D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Bellar, RJ: AUTHOR [+3]

Abstract

Reel-to-reel and cartridge tape drives utilize an air compressor to provide pressurized air to hydrostatic air bearings in the tape path. The air bearings maintain a thin layer of air between the tape and the air bearing surface to reduce friction and wear in the tape path.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Heat Pipe Cooling of a Rotary Carbon Vane Compressor to Increase the Life of the Compressor

       Reel-to-reel and cartridge tape drives utilize an air
compressor to provide pressurized air to hydrostatic air bearings in
the tape path.  The air bearings maintain a thin layer of air between
the tape and the air bearing surface to reduce friction and wear in
the tape path.

      The IBM 3480/90 tape drives have been specified with a
compressor life of 30 to 40 thousand hours.  As new products become
smaller the size of the compressor reduces correspondingly.  This
results in larger amounts of heat to be dissipated from smaller
areas, which, in turn, increases the compressors' nominal operating
temperature.  As a rule of thumb, the life of the compressor doubles
for every 10 degree C decrease in vane operating temperature.

      To obtain the decrease in vane temperature necessary to
increase compressor life, the application of a flat plate heat pipe
is proposed.  The flat plate heat pipe can be attached to the front
face of the compressor using thermal epoxy.  Heat is transferred from
the compressor to the evaporator section of the heat pipe, which
causes fluid to evaporate and flow to the condensing section.  Heat
is then dissipated to ambient air through heat sinks in the
condensing section, where the vapor condenses and the liquid flows
back to the evaporator by capillary action.