Abstract: A flange covering a disc of a turbine blade to allow ventilation. A diverted face of the disc is provided with a labyrinth seal with lickers to form a seal. Cutters of the lickers are inclined axially and staggered axially and radially, to off-set the center of gravity of a flexible web of the disc and to encourage deformation of the web towards the disc under the effect of centrifugal forces, to reinforce the contact of a bearing face with a pressure plate of the disc. Thus, hooks usually used to unite the periphery of the web to the disc become superfluous.

Abstract: A flange (10) covering a disc (3) of a turbine blade (4) in order to allow ventilation (27, 29) and whose diverted face (24) of the disc (3) is provided with a labyrinth seal (20) with lickers (23) to form a seal, original in that the cutters (37) of the lickers (23) are inclined axially and staggered axially and radially, in order to off-set the center of gravity of the flexible web (14) of the disc and to encourage deformation of the web (14) towards the disc (3) under the effect of centrifugal forces, in order to reinforce the contact of a bearing face (15) with a pressure plate (16) of the disc (3). Thus the hooks usually used to unite the periphery of the web (14) to the disc (3) become superfluous.