CPC F01D 15/12 (2013.01) [F02C 3/04 (2013.01); F02C 7/06 (2013.01); F02C 7/36 (2013.01); F02C 9/18 (2013.01); F02K 3/06 (2013.01); F16H 57/0482 (2013.01); F05D 2220/323 (2013.01); F05D 2230/10 (2013.01); F05D 2230/232 (2013.01); F05D 2230/60 (2013.01); F05D 2230/90 (2013.01); F05D 2260/31 (2013.01); F05D 2260/4031 (2013.01); F05D 2260/40311 (2013.01); F05D 2260/98 (2013.01); F05D 2300/141 (2013.01); F05D 2300/171 (2013.01); F05D 2300/2284 (2013.01); F16H 1/28 (2013.01); Y02T 50/60 (2013.01)] | 19 Claims |
1. A gas turbine engine comprising:
a propulsor and a fan drive turbine, the fan drive turbine driving the propulsor through a geared architecture;
the geared architecture including a sun gear, a ring gear, and intermediate gears supported on journal support pins, the sun gear engaging the intermediate gears and the intermediate gears engaging the ring gear; and
wherein the journal support pins include:
a titanium body and an outer surface outside of the titanium body having a surface hardness that is harder than the titanium body, the outer surface provided by a steel sleeve,
oil supply holes extending from a central bore in the body through the steel sleeve, and
at least one pin extending through the steel sleeve to secure the steel sleeve to the titanium body.
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