CERMET GAS LINE FOR HIGH-TEMPERATURE GAS TURBINE Russian patent published in 2001 - IPC

FIELD: gas-turbine manufacture for gas-turbine engines. SUBSTANCE: gas line is composite structure made in the form of tightly joined and packed midget ceramic members each one being locally dove-tailed in squirrel-cage bearing structures. Gas-line sections are placed in quasi- sealed spaces of gas-turbine engine stator packed with refractory heat- insulating granules; gas-line sections carrying cycle air compressed to corresponding pressure communicate with gas-turbine engine compressor. Midget ceramic members incorporated in gas line meet requirements to factor of dimensions for joining ceramic and metal parts, dominating loading with compressive stresses, uniformity of variations in thickness of ceramic part; they have no stress concentrators nor evident irregularities of temperature fields. EFFECT: enhanced reliability of gas line released from gas pressure difference; reduced cooling air consumption. 15 cl, 10 dwg