Internal cooling of the case of a low pressure turbine

A low pressure turbine casing (10) has a conical annular shell (12) circumscribed about a centerline (14). A forward flange (16) depends from a forward end (18) of the annular shell (12) and a forward hook (22) extends aftwardly from the forward flange (16). First and second rails (23, 25) having fi...

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Bibliographische Detailangaben
Hauptverfasser:	ZEGARSKI, FREDERICK J, THOMPSON, JAMES EDWARD, HILDEBRAND, KURT THOMAS, ANDERSON, JR., HENRY CALVIN, BOSEL, TOD KENNETH
Format:	Patent
Sprache:	eng ; fre ; ger
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:	A low pressure turbine casing (10) has a conical annular shell (12) circumscribed about a centerline (14). A forward flange (16) depends from a forward end (18) of the annular shell (12) and a forward hook (22) extends aftwardly from the forward flange (16). First and second rails (23, 25) having first and second hooks (24, 26), respectively, extend aftwardly from the annular shell (12). First and second cooling holes (27, 29) extend through the first and second rails (23, 25), respectively. Cooling air feed holes (28) extend through the forward flange (16). The first and second cooling holes (27, 29) may be radially disposed through the first and second rails (23, 25), respectively, with respect to the centerline (14) or disposed through the first and second rails (23, 25) at an oblique angle with respect to the centerline (14). A low pressure turbine casing and shroud assembly (40) further includes a first annular cavity (50) in fluid flow communication with the first cooling holes (27) and the second cooling holes (29). A second annular cavity (70) is in fluid flow communication with the first and second cooling holes (27, 29).