Variable Vane Overlap Shroud

摘要

A shroud supports one of an inner and an outer trunnion on a variable vane. The shroud is provided by a first and a second axial half. Each of the axial halves is provided by a plurality of circumferentially spaced segments. Circumferential edges are defined on each of the plurality of circumferentially spaced segments. Edges between adjacent ones of the circumferentially spaced segments on the first half are circumferentially offset from the edges on adjacent ones of circumferentially spaced segments of the second half, such that no direct leakage path exists across an axial width of the shroud.

主权项

1. A variable vane assembly comprising:
a plurality of vanes having an airfoil extending between an inner trunnion and an outer trunnion; an actuator for causing said plurality of airfoils to pivot to change an angle of incidence; and a shroud supporting one of said inner and outer trunnions, said shroud being provided by a first and a second axial half, with said shroud including a plurality of support surfaces for supporting said one of said trunnions, and each of said axial halves being provided by a plurality of circumferentially spaced segments, with circumferential edges defined on each of said plurality of circumferentially spaced segments, and edges between adjacent ones of said circumferentially spaced segments on said first half being circumferentially offset from the edges on adjacent ones of circumferentially spaced segments of said second half, such that no direct leakage path exists across an axial width of said shroud.