HIGH PRESSURE LIP SEALS WITH ANTI-EXTRUSION AND ANTI-GALLING PROPERTIES AND RELATED METHODS

摘要

Sealing assemblies to provide sealing between a shaft and a housing comprising a sealing component comprising a body section as well as an outer flange and an inner flange both extending from said body section; a supporting component receiving said sealing component and comprising a relatively thick inner arm projecting into said sealing component and providing a supporting area spanning an inner portion of said body section and a portion of said inner flange; an anti-extrusion component engaged with said relatively thick inner arm; the minimum clearance between said anti-extrusion component and said shaft being less than the minimum clearance between said relatively thick inner arm and said shaft; said inner flange comprising a sealing area; wherein said sealing assembly is to be received in a cavity in said housing or on said shaft.

主权项

1. A sealing assembly to provide sealing between a shaft and a housing comprising:
a sealing component comprising a body section, an outer flange, and an inner flange both extending from said body section, said inner flange comprising a sealing area and a sealing lip; a supporting component receiving said sealing component and comprising an inner arm comprising an inner arm stub projecting under said sealing component, said inner arm stub providing a supporting area spanning an inner portion of said body section and a first portion of said inner flange of said sealing component and comprises an inner arm edge; an anti-extrusion ring engaged to said inner arm stub, said anti-extrusion ring comprising an inner surface; wherein said inner arm edge of said inner arm stub defining a first inside diameter and said inner surface of said anti-extrusion ring defining a second inside diameter, and wherein the second inside diameter is smaller than the first inside diameter so that when the sealing assembly is mounted on a shaft, said second inside diameter has a smaller clearance than said first inside diameter with the shaft.