DEVICE FOR COOLING A TURBOMACHINE CASING

The invention relates to a turbine for a turbomachine, comprising a first rotor and a second rotor that are able to pivot about an axis in two opposite directions of rotation, the first rotor comprising a radially outer drum (29) from which blades extend radially inward, characterized in that it com...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DANTENY, Ulysse, ZAMAI, Laurent
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a turbine for a turbomachine, comprising a first rotor and a second rotor that are able to pivot about an axis in two opposite directions of rotation, the first rotor comprising a radially outer drum (29) from which blades extend radially inward, characterized in that it comprises cooling means (33) that are fixed with respect to the outer drum (29), said cooling means (33) comprising a supporting sheet (34) comprising at least one first orifice (40) and a calibration sheet (41) that is fastened to the supporting sheet (34) and is located radially inside the supporting sheet (34), the calibration sheet (41) comprising at least one second calibration orifice oriented towards the outer drum (29) in such a way as to allow cooling air to pass radially from outside to inside through the first and second orifices (40). L'invention concerne une turbine pour une turbomachine comportant un premier rotor et un second rotor aptes à pivoter autour d'un axe selon deux sens de rotation opposés, le premier rotor comportant un tambour (29) radialement externe à partir duquel des aubes s'étendent radialement vers l'intérieur, caractérisée en ce qu'elle comporte des moyens de refroidissement (33) fixes par rapport au tambour externe (29), lesdits moyens de refroidissement (33) comportant une tôle support (34) comprenant au moins un premier orifice (40) et une tôle de calibration (41) fixée sur la tôle support (34) et située radialement à l'intérieur de la tôle support (34), la tôle de calibration (41) comprenant au moins un second orifice de calibration tourné vers le tambour externe (29) de manière à permettre le passage d'air de refroidissement radialement de l'extérieur vers l'intérieur au travers des premier et second orifices (40).