Fan blade tip clearance control via Z-bands

摘要

An engine has a blade, a casing surrounding the blade, an seal ring, and a passive system for connecting the seal ring to the casing and for accommodating thermal expansion of the seal ring relative to the casing so as to maintain blade tip clearance control. The passive system may include at least one, metallic Z-band extending between the casing and the seal ring.

主权项

1. An engine comprising:
a blade; a casing surrounding said blade; a seal ring; and a passive system for connecting said seal ring to said casing and for accommodating thermal expansion of said seal ring relative to said casing so as to maintain blade tip clearance control, wherein said passive system comprises at least one non-corrugated, solid Z-band extending between said casing and said seal ring; and further comprising a slip joint between a wall of said casing and leading edge and trailing edge portions of said abradable seal ring.