Axial shaft seal for a turbomachine
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United States of America Patent
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-
Sep 15, 2015
Grant Date -
Jan 10, 2013
app pub date -
May 15, 2012
filing date -
Jul 7, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A turbomachine has a housing having a passage extending along an axis and an annular axially directed housing face extending radially from the passage. A shaft extending axially in the passage has an outer shaft surface radially spaced from an inner surface of the passage and forming therewith an annular axially extending gap. A radial impeller fixed to the shaft outside the housing has an axially directed and radially extending impeller face axially spaced from and confronting the radial housing face and forming therewith a radially extending gap opening into the axially extending gap. An impeller housing forms a flow space with the impeller outside the housing. The radial gap opens into the flow space. A plurality of spaced seals engaged in the radial gap between the radial faces of the housing and impeller fluidically separates the axial gap from the flow space.
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