Steam cooled gas turbine rotor

F - Mech Eng,Light,Heat,Weapons – 01 – D

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Details

F01D 5/08 (2006.01) F01D 25/00 (2006.01)

Patent

CA 2247491

A gas turbine having rotor blades cooled with steam. A cooling steam circulation passage for a gas turbine rotor (30) having turbine discs (41 ~ 47) are composed of center line bores (73 ~ 77) open at an axial end of the rotor and extending through a central portion of the rotor; a steam inlet-outlet pipe (79) coaxially disposed therein so as to define an annular passage (81) for cooling steam at an outer side; steam cavities (89a, 89b) defined between and by facing side surfaces of said turbine discs; steam cavities (91a, 91b) each defined at non-facing side surface portions of said turbine discs (41, 43); axial steam holes (61, 63) formed to extend through the turbine discs and including a partition tube (99); and radial steam holes (97, 103a, 103b, 105, 107) extending from each of the steam cavities (91a, 101, 89a) to mounting portions for the rotor blades.

Une turbine à gaz possède des pales mobiles refroidies par vapeur. Un conduit de circulation de vapeur de refroidissement dans un rotor turbine (30) ayant des disques (41-47) de turbine comprend des trous axiaux centraux (73-77) ouverts à une extrémité axiale du rotor et s'étendant centralement dans le rotor turbine, un tuyau (79) d'entrée et de sortie de vapeur coaxial par rapport aux trous axiaux et définissant à l'extérieur un passage annulaire (81) pour la vapeur de refroidissement, des espaces (89a, 89b) pour la vapeur définis entre les surfaces latérales se faisant face des disques (41, 43) de turbine, des espaces (91a, 91b) pour la vapeur, respectivement, définis sur des surfaces latérales ne se faisant pas face des disques de turbine, des trous axiaux (61, 63) pour la vapeur formés pour s'étendre à travers les disques de turbine et renfermant un tuyau (99) de compartiment, et des trous radiaux (97, 103a, 103b, 105, 107) pour la vapeur s'étendant vers un support de pales mobile depuis les espaces respectifs (91a, 101, 89a) pour la vapeur.

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