Self-compensating clearance seal for centrifugal pumps
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United States of America Patent
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May 25, 2004
Grant Date -
Apr 8, 2004
app pub date -
Jul 8, 2002
filing date -
Jul 8, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A seal for use in a centrifugal pump of the type used for pumping an abrasive slurry, and having a sealing ring groove formed in the pump casing and an arrangement for supplying flushing water, comprising a radial seal having a sealing end, a water receiving end, and opposed sides and adapted for installation within the sealing ring groove, the radial seal having multiple openings formed therethrough for the passage of flushing water. The openings are dimensioned and located so that when flushing water is supplied to the water receiving end of the radial seal, the water flows through the openings, causing the radial seal to automatically moves to a self-compensating balanced position between the pump casing and a rotating pump impeller. This will reduce leakage between the pump casing and pump impeller and reduce wear of the pump surfaces.
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