Mechanical seal ring assembly with hydrodynamic pumping mechanism
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United States of America Patent
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May 27, 2008
Grant Date -
Dec 1, 2005
app pub date -
Apr 7, 2005
filing date -
May 28, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A seal ring configuration adapted to be disposed about a shaft to seal a fluid at a pressure differentials across the seal. The seal ring configuration comprises a mating ring and an axially movable primary ring. The primary ring includes a seal face in opposing relationship to the mating ring seal face to define a seal interface. The mating ring seal face or the primary ring seal face defines an annular axially recessed section and a dam section. The recessed section is axially disposed further from the cooperating seal face relative to the dam section. The axially recessed section further includes a face pattern axially spaced further from the dam section than the recessed portion and is capable of generating a hydrodynamic force between the mating ring seal face and the primary ring seal face.
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