Patent ID: 11859503
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G | IPC F

Claim 0:
1. A gas turbine engine hot section comprising:
a turbine housing extending around a central axis and having a first probe boss;
an exhaust case surrounding the turbine housing and having a second probe boss aligned with the first probe boss on the turbine housing;
a cavity radially between the turbine housing and the exhaust case;
a probe extending through the second probe boss, the cavity and the first probe boss; and
a sleeve extending from the first probe boss through the cavity and into the second probe boss, the sleeve circumscribing an annular cavity around the probe, the annular cavity being sealed at opposed radially inner and radially outer ends thereof to form a dead air cavity around the probe, wherein the sleeve has a radially inner end having an inner diameter surface in tight fit engagement with an outer diameter surface of the first probe boss, and wherein the inner diameter surface includes circumferentially spaced-apart tight fit contact surface segments and inter-segment slots providing a discontinuous tight fit interface between the sleeve and the first probe boss.