STEAM TURBINE DIAPHRAGM Russian patent published in 1998 - IPC

FIELD: steam turbines. SUBSTANCE: diaphragm includes disk 1 which is split over diameter; disk is provided with nozzle passages 2 formed by solid nozzle vanes 3 secured on rim. Diaphragm has central orifice with two parallel shaped grooves over its circumference where segments 6 with strips 7 of labyrinth seal, bounding the chamber are located. This chamber is brought in communication with nozzle vanes 3 through passages 14 provided in disk. Provided inside nozzle vanes 3 are additional nozzle passages 10 whose inlet is communicated with passages 2 running from chamber and outlet is communicated respectively with nozzle passages. EFFECT: enhanced efficiency of operation due to reduction of heat losses. 3 dwg