TURBINE BLADE AND ITS COOLING PROCESS, DEVICE FOR FILLING TURBINE BLADE CLOSED CIRCUIT WITH COOLANT Russian patent published in 1997 - IPC

FIELD: power engineering. SUBSTANCE: primary coolant is passed through open-circuit channels made in blade and secondary coolant moves under thermosiphon pressure over closed-circuit loop channels passing through blade feather. Heat transfer from secondary coolant to primary one is effected near blade feather and thermosiphon differential pressures are summed up by sequential connection of closed-circuit loop channels. Closed coolant circuit is helical channel with oval turns. The latter may alternate from left to right direction. Device for filling turbine blade with coolant has tank communicating with closed-circuit channel. it is round cylinder with bottom and cover. Two holes are made in bottom to receive cylindrical tubes communicating with channel. EFFECT: improved cooling conditions. 14 cl, 17 dwg