FIELD: machine building.
SUBSTANCE: invention relates to the field of transport and power turbine construction and can be used in the design of working blades of a high-temperature gas turbine having shrouds. Shroud of working blade of high-temperature gas turbine, which contains sector of annular element 1 with at least one crest of labyrinth seal 2, stiffening ribs 3 and screen 4. Sector of annular element 1, stiffeners 3 and screen 4 form cavity 5 for supplying air from inner cavity 6 of working blade and directing it to contact surfaces 7 of shroud.
EFFECT: invention provides an increase in the service life of both the working blades and the high-temperature gas turbine by reducing the temperature of the shroud shelf of the working blade in the area of the contact surfaces.
1 cl, 4 dwg
