Mechanical seal with enhanced face stability
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United States of America Patent
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Jun 14, 2011
Grant Date -
Sep 13, 2007
app pub date -
Mar 7, 2007
filing date -
Mar 8, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A seal assembly for use with a rotating shaft comprises a seal ring, a seal ring shell and bellows. The seal ring defines an axially extending annular surface and a radially extending seal face. The seal ring shell includes a foot portion connected to a radially extending shin portion located radially outward of the foot portion. The foot portion defining an axially extending engagement surface in interference-fit engagement with the annular surface of the seal ring. The engagement surface is positioned so as to have a near-zero moment about the center of gravity of the seal ring due to the engagement. The bellows defines an effective diameter at zero pressure applied on the seal ring. The interface of the foot portion with the seal ring defines an interference diameter.
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