Mounting for ceramic scroll.

摘要

A mounting for a ceramic scroll (42) on a metal engine block of a gas turbine engine includes a first ceramic ring (60) and a pair of cross-key connections (66-70) between the first ceramic ring (60), the ceramic scroll (42), and the engine block. The cross-key connections (66-70) support the scroll (42) on the engine block independent of relative radial thermal growth and for bodily movement towards an annular mounting shoulder (28) on the engine. The scroll (42) has an uninterrupted annular shoulder (70) facing the mounting shoulder (28) on the engine block. A second ceramic ring (62) is captured between the mounting shoulder (28) and the uninterrupted shoulder (70) on the scroll (42) when the latter is bodily shifted towards the mounting shoulder (28) to form a gas seal between the scroll (42) and the engine block. <IMAGE>