Vane pump wear sensor for predicted failure mode
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United States of America Patent
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Apr 24, 2007
Grant Date -
Jul 8, 2004
app pub date -
Nov 17, 2003
filing date -
Sep 28, 2000
priority date (Note) -
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Abstract
A vane pump is disclosed for use with gas turbine engines that is adapted and configured to provide a failure mode similar to that of a traditional gear pump. The vane pump includes a pump housing, a cam member, a cylindrical rotor member and a mechanism for communicating a high pressure fluid from the discharge arc region to the inlet arc region when the tip surface of each vane element has experienced a predetermined amounted of wear so as to prevent pump startup. The tip surface of each vane element wears as a result the sliding contact with the circumferential surface of the pumping cavity.
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