FIELD: machine building.
SUBSTANCE: group of inventions relates to a sealing device of an axial turbomachine, comprising circular strip (38) with an outer surface and an inner surface; annular layer of abradable material (40) on one of the outer and inner surfaces of the strip, designed to provide sealing with an annular row of rotor blades (24). Surface (42) of the strip covered by abradable layer (40) comprises at least two perforated circular zones (46; 48), each with a series of distributed perforations (50). Surface (42) of the strip covered by abradable layer (40) further comprises smooth circular zone (44) disposed axially between perforated areas (46; 48). Smooth zone (44) is centered on outer ends (54) of rotor blades (24). Invention improves adhesion of abradable layer (40) on metal strip (38), and enables to avoid premature breakdown of the abradable layer in contact with the rotor blades, despite presence of perforations (50).
EFFECT: object of the invention is to solve at least one of the technical problems presented by the prior art, and keep at least one of the advantages mentioned.
15 cl, 4 dwg
