CPC F01D 9/041 (2013.01) [F01D 9/042 (2013.01); F01D 17/162 (2013.01); F05D 2220/32 (2013.01); F05D 2240/12 (2013.01)] | 20 Claims |
1. A method of operating a variable vane for a gas turbine engine, the method comprising:
locating a first bushing at least partially surrounding a first trunnion extending from a first end of the variable vane, the first trunnion includes an outer surface having a plurality of troughs and the first bushing includes a plurality of peaks extending inward from an inner surface;
producing relative movement between the first bushing and the first trunnion to form a carbon transfer film between the first bushing and the first trunnion; and
the relative movement between the first bushing and the first trunnion wears the plurality of peaks down to form the carbon transfer film.
|