Film riding shaft seal
AssigneeWestinghouse Electric Corp.
InventorsWilliam Byers, Gene Zottola
Life of this patent
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Abstract
The invention is a film-riding seal for a pump shaft that is resistant to the deposition of iron oxides such as hematite and goethite on the confronting, spaced apart, seal surfaces. The seal generally comprises a ceramic runner mounted on the pump shaft and an adjacent ceramic stationary sealing ring. The runner has a sealing surface and the stationary sealing ring has sealing surface confronting the runner sealing surface. The ceramic sealing surfaces include a catalyst selected from the group consisting of rhenium, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, gold and mixtures thereof.
Claims10
A film-riding seal for a pump shaft, comprising:
- a ceramic runner mounted on the pump shaft, the ceramic runner having a sealing surface;
- a ceramic stationary sealing ring having a sealing surface confronting and spaced from the runner sealing surface;
- wherein at least one of the confronting surfaces comprises a catalyst selected from the group consisting of rhenium, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, gold and mixtures thereof.
Dependencies are inferred from the claim text.