Sealing arrangement for a nozzle guide vane and gas turbine

摘要

It is described a nozzle guide vane support arrangement, comprising: a platform portion (11) of a nozzle guide vane (109, 115, 111) at a trailing edge (117) of the nozzle guide vane, the platform portion (111) having a platform wall, the platform wall having a first platform wall portion (123) and a second platform wall portion (125), the first platform wall portion (123) comprising a working fluid interaction surface (137) on a first side thereof and a cooling surface (139) on a second side thereof, the cooling surface (139) at least partly limiting an inner cavity (133) of the platform portion (111) in which inner cavity a cooling fluid (141) is leadable; the second platform wall portion (125) being connected to the first platform wall portion (123) at an axial downstream end (143) of the platform portion (111), a first surface (147) of the second platform wall portion (125) at least partly limiting the inner cavity (133); a support structure (121) for supporting the platform portion (111), the support structure having a recess (127); a seal (129), in particular rope seal, arranged in the recess (127) between the support structure (121) and a second surface (145) of the second wall portion (125), wherein the seal (129) is adapted to reduce cooling liquid (141) leakage from the inner cavity (133) to a space (135) downstream the support structure (121).