Internally pressurized seals
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United States of America Patent
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-
Oct 14, 2014
Grant Date -
Apr 14, 2011
app pub date -
Mar 23, 2009
filing date -
Apr 1, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A seal assembly having a first seal ring sealed to a rotatable component and a second seal ring sealed to another rotatable component, and the second ring is urged towards the first ring such that sealing faces of the seal rings engage. A process chamber is formed inside the seal rings and opens to an outside the seal rings, and a barrier chamber outside of the seal rings opens to inside the seal rings. A shroud shields the external surface of the seal rings from process fluid in the process chamber such that heat transfer from the process fluid to the seal rings occurs at outer regions of the seal rings adjacent the sealing faces, and a sleeve is secured inside the seal rings such that heat transfer between the seal rings and barrier fluid in the barrier chamber occurs at radially extending surfaces of the seal rings adjacent the sealing faces.
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