Sealing arrangement for a nozzle guide vane and gas turbine

摘要

A nozzle guide vane support arrangement including a platform portion of a nozzle guide vane at a trailing edge is provided, the platform portion having a platform wall including a first platform wall portion and a second platform wall portion. A working fluid interaction surface and a cooling surface at least partly limit an inner cavity of the platform portion in which a cooling fluid is leadable. The second platform wall is connected to the first platform wall at an axial downsealing arrangement and gas turbinesealing arrangement for a nozzle guide vane and gas turbinestream end of the platform portion. A first surface of the second platform wall limits the inner cavity, and a support structure including a seal arranged in a recess between the support structure and a second surface of the second wall to reduce cooling liquid leakage from the inner cavity to a space downstream.

主权项

1. A nozzle guide vane sealing arrangement, comprising:
a platform portion of a nozzle guide vane, the platform portion having a platform wall, the platform wall having a first platform wall portion and a second platform wall portion, the first platform wall portion comprising a working fluid interaction surface on a first side thereof and a cooling surface on a second side thereof, the cooling surface at least partly limiting an inner cavity of the platform portion in which inner cavity a cooling fluid is leadable; the second platform wall portion being connected to the first platform wall portion at a downstream end of the platform portion, a first surface of the second platform wall portion at least partly limiting the inner cavity; a support structure for supporting the platform portion, the support structure having a recess; a seal arranged in the recess between the support structure and a second surface of the second platform wall portion, wherein the seal is adapted to reduce cooling liquid leakage from the inner cavity to a space downstream the support structure.