Browse Prior Art Database

Nedox Coating to Increase Vane Compressor Life

IP.com Disclosure Number: IPCOM000111681D
Original Publication Date: 1994-Mar-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

De Lessio, A: AUTHOR

Abstract

Rotary vane compressors consist of a motor, hub, and a shaft or rotor. In the rotary vane compressor the rotor acts as a housing for a minimum of four or more graphite composite vanes (Figure). The rotor is offset from the hub which creates a void where the incoming air is trapped by the rotary vane. As the vane continues its rotation, the volume of the void is decreased and the trapped air is compressed and expelled from the compressor at a pressure which is greater than atomsphere.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 59% of the total text.

Nedox Coating to Increase Vane Compressor Life

      Rotary vane compressors consist of a motor, hub, and a shaft or
rotor.  In the rotary vane compressor the rotor acts as a housing for
a minimum of four or more graphite composite vanes (Figure).  The
rotor is offset from the hub which creates a void where the incoming
air is trapped by the rotary vane.  As the vane continues its
rotation, the volume of the void is decreased and the trapped air is
compressed and expelled from the compressor at a pressure which is
greater than atomsphere.

      The primary component which dictates the life of the rotary
vane compressor is vane wear.  Vane wear is a result of the friction
between the vane and the inner hub as the rotor turns.  There are two
critical wear components: 1) vane composition and 2) surface
roughness of the inner hub.

      The Nedox* coating is applied to the inner hub, creating a new,
extremely hard, extrememly smooth, dry-lubricated surface that gives
a part superior abrasion and corrosion resistance.  The compressor
industry has attempted to use Teflon** and nickel coatings with no
increase of vane compressor life.  However, the Nedox coating
eliminates the problems associated with the previous coatings.  The
Teflon would cause a compressor failure when the Teflon started to
separate from the contact surface.  The nickel coating was too
abrasive, causing excessive wear to the vanes and resulting in a
premature compressor failure.  The ap...