Turbine vane with dusting hole at the base of the blade

Details Turbine vane with dusting hole at the base of the blade Turbine vane with dusting hole at the base of the blade

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/14 (2006.01) F01D 5/18 (2006.01) F01D 9/02 (2006.01)

Patent

CA 2757288

The invention relates to a cooled turbine vane for a turbine engine, that comprises a blade (2) mounted on a platform (6) carried by a base (5), said blade having one or more cavities formed therein for cooling air circulation, the cavity (11) extending along the trailing edge and being supplied with cooling air by a supply duct (10) connecting an air intake (12) located in the lower portion of the base (5) and the cavity (11) of the trailing edge by defining a bend (13) within said base, characterised in that the duct (10) comprises, on an axis substantially radial relative to the air intake (12) a bell-shaped niche (14) located under the platform (6), said niche being open at the top thereof via a dusting hole (19) extending through the platform and being defined at the foot of the base (5) by walls extending substantially radially from the platform (6) in order to close it laterally.

Aube de turbine refroidie pour turbomachine comprenant une pale (2) montée sur une plate-forme (6) portée par un pied (5), ladite pale étant creusée d'une ou plusieurs cavités pour la circulation d'air de refroidissement, la cavité (11) s'étendant le long du bord de fuite étant alimentée en air de refroidissement par un conduit d'alimentation (10) reliant une entrée d'air (12) située en partie basse du pied (5) à la cavité (11) de bord de fuite en faisant un coude (13) au sein dudit pied, caractérisée en ce que le conduit (10) comporte, sur un axe sensiblement radial par rapport à l'entrée d'air (12), une niche (14) située sous la plate- forme (6) ayant une forme en cloche, ladite niche débouchant à son sommet par un trou de dépoussiérage (19) traversant ladite plate-forme et étant délimitée à l'intérieur du pied (5) par des parois s'étendant sensiblement radialement à partir de la plate-forme (6) pour la refermer latéralement.

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