FIELD: engines and pumps.
SUBSTANCE: sealing element of leakage channel between turbine nozzle external platform and its support ring includes leaf seal and a plate forming impact jets. Support ring and external platform include surfaces arranged perpendicular to nozzle segment axis and forming the first and the second sealed surfaces accordingly. Sealed surfaces are in the same plane and have a radial gap in between. Leaf seal closes a gap between sealed surfaces. The plate forming impact jets provides impact-jet cooling of radial external surface of external platform and is designed with possibility of its rigid fixation to turbine nozzle. Another invention relates to gas turbine nozzle device containing support ring and nozzle segments, each of them containing external platform forming segment of external wall of operating gas flow channel, at least one guide blade and above mentioned sealing element. One more invention of the group refers to gas turbine containing above mentioned nozzle device.
EFFECT: group of inventions allows simplifying sealing element of gas turbine.
14 cl, 5 dwg
