Ergänzungsdichtung für Verdichtung einer Sehnenscharnierbefestigung für Gasturbinen

摘要

In a gas turbine having a chordal hinge seal (46) between an inner rail (52) of each nozzle segment and an annular axially facing sealing surface (54) of a nozzle support ring (44), a flexible supplemental seal (70) is disposed between the support ring and inner band (52) of the nozzle segment radially inwardly of the chordal hinge seal. To minimize or prevent leakage flow across the chordal hinge seal, the flexible seal extends between the inner rail and the sealing surface of the support ring radially inwardly of the chordal hinge seal. A first margin (74) of the flexible seal engages in a linear groove carried by the inner rail. The opposite margin (78) extends arcuately in sealing engagement with the nozzle support ring.