초록 ▼

An end face seal assembly is disclosed for use in severe service applications, such as for use in sealing a track joint. The seal assembly includes a rubber load ring, an L-shaped metal seal ring and a polyurethane seal ring. The polyurethane seal ring is mounted in a groove provided in the end face

An end face seal assembly is disclosed for use in severe service applications, such as for use in sealing a track joint. The seal assembly includes a rubber load ring, an L-shaped metal seal ring and a polyurethane seal ring. The polyurethane seal ring is mounted in a groove provided in the end face of the track bushing and has a seal lip which dynamically seals against a radial sealing surface of the metal seal ring. The load ring mounts the metal ring in the counterbore of the outer track link and provides the axial force for urging the metal seal ring into axial sealing engagement against the seal lip. The seal assembly eliminates grooving of the bushing end face which occurs with the use of prior art seals which use such end face as a dynamic sealing surface. The metal seal ring of the present seal assembly is made of an extremely hard and corrosion resistant material so as to virtually eliminate such grooving.

대표청구항 ▼

An end face seal assembly adapted for use in sealing a joint wherein a first member of said joint is pivotable about an axis relative to a second member thereof, said first member having an annular, axially opening seal cavity about said axis, said seal assembly comprising: a first seal ring (50) of

An end face seal assembly adapted for use in sealing a joint wherein a first member of said joint is pivotable about an axis relative to a second member thereof, said first member having an annular, axially opening seal cavity about said axis, said seal assembly comprising: a first seal ring (50) of a rigid metal construction positionable within said seal cavity and having an L-shaped cross sectional configuration defining a radially outwardly extending flange portion and an axially extending flange portion said radial flange portion having a hard, wear and corrosion resistant radial sealing surface; a resilient second seal ring having an annular seal lip of a wear resistant polyurethane, said lip being disposed for axial sealing engagement against said radial sealing surface of said rigid first seal ring; an elastomeric load ring being positionable between said seal cavity and said rigid first seal ring for axially urging said radial sealing surface into axial sealing engagement against said seal lip of said resilient second seal ring; and means for maintaining said second seal ring in a fixed, non-rotative relationship relatively to said second member during pivoting of said joint, said means including said second member having an annular groove opening toward said radial sealing surface of said first seal ring and said second seal ring having a body portion positionable within said groove.