Variable stator vane support arrangement
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United States of America Patent
Stats
-
Jan 27, 2004
Grant Date -
Sep 11, 2003
app pub date -
Nov 15, 2001
filing date -
Nov 15, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A trunnion support for a variable-position stator vane in a turbomachine. The stator vane includes an upper trunnion and a lower trunnion to allow the stator vane to be pivoted about a longitudinal axis. The lower trunnion is supported in a bushing that is carried in an opening provided in an annular stator vane carrier ring. The bushing is longitudinally split and is installed in the carrier ring while in a laterally compressed condition so that when installed in the carrier ring the bushing bears against the carrier ring opening in which it is positioned. When the carrier ring material expands with rising temperature, the pre-stress in the bushing will cause it to expand to maintain tight frictional engagement between the bushing and the opening and thereby prevent relative rotation between the bushing and the carrier ring to minimize wear of the carrier ring material.
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