FIELD: machine building.
SUBSTANCE: turbine blade comprises an elongated profile with a leading and back edges, an edge at a first end of the profile and a root at a second end of the profile opposite the first end. At the first end, a sealing edge is formed from a radially extending side edge wall of a high pressure side with an outer surface, a radially extending side edge wall of a low pressure side with an outer surface and extending along the axis of the edge wall, extending between the edge wall of the high pressure side edge and the edge side of the low pressure side. Axially extending edge wall is concave and is formed of two outer linear surfaces joined together at their intersection. Inner surface of the edge extending along the axis of the wall forms a radially outer boundary of a cavity of a cooling system and comprises a convex surface with the radially outermost points of the convex surface at the intersections with the walls of the high pressure side and the low pressure side.
EFFECT: invention makes it possible to reduce the flow over the edge of the blade of the turbine and provide improved cooling in the region of the edge near the walls of the increased and reduced pressure sides.
11 cl, 9 dwg
