STATOR OF MULTISTAGE GAS TURBINE Russian patent published in 2000 - IPC

FIELD: mechanical engineering; gas turbines. SUBSTANCE: stator of multistage gas turbine has outer housing furnished with radial ribs pointed to center. Outer flanges of rims of nozzle blade stages and split ring sector are arranged on ribs. Additional parts are installed between outer flanges of rims of nozzle blade stages, split ring sectors and seats on surfaces of housing radial ribs. Additional parts are made in form of ring envelopes or tapes in form of ring which divide spaces, formed by outer shell of housing, its ribs and outer surfaces of flanges of nozzle blades and split ring sector, into inner spaces, located near axis, and outer spaces, adjoining stator outer shell. Inner spaces are filled up with heat insulating material. Outer spaces of all stages of nozzle blades and split rings are connected by axially directed channels made in radial ribs of outer housing to form common system, or are divided into several systems. EFFECT: increased efficiency of turbine owing to reduction of radial clearances and improved efficiency of cooling of stator inner members. 1 dwg