STEAM TURBINE MEDIUM-PRESSURE TWO-FLOW CYLINDER Russian patent published in 2011 - IPC F01D5/08 F01D3/02 

FIELD: engines and pumps.

SUBSTANCE: proposed two-flow cylinder comprises outer and inner housings 1 and 2, rotor 3 with disks 4 and working vanes of direct section of straight and back flows 6 and 7, diaphragms 7 and 8 of said flows and shell 11. Medium-pressure cylinder inner housing central part accommodates shielding body 12 to rest on cylinder inner housing. Shell is arranged axially symmetric inside shielding body and is provided with communicated annular chambers 13 and 14 provided with holes 15 and 16 made of the shell inner and face walls. Diaphragms of straight and back flow stages are provided with annular chambers 17 and nozzles 18. Guide vanes of second stage diaphragms are provided with holes 20. Annular chambers in said diaphragms are communicated by lines 21 and 22 with external source of cooling steam.

EFFECT: cooling of strained disks ob both flows, reduced metal creep Longer life.

1 dwg