HEAT-INSULATED TURBINE BLADE Russian patent published in 1997 - IPC

FIELD: gas-turbine power plants. SUBSTANCE: heat-insulated turbine blade has base and feather whose metal rod is covered with ceramic coat. Screen of unidirectional metal fins and ceramic threads separated by clearances and placed across fins with loose engagement of fins is made on rod surface. Ceramic threads are placed between rod surface and metal fins; the latter are secured to rod surface in clearances between threads. Metal fins are crosswise relative to feather rod; ceramic threads are longitudinal to it. Longitudinal ceramic threads are arranged in longitudinal slots between longitudinal metal fins which support crosswise fins. Crosswise slots between crosswise fins accommodate crosswise ceramic threads attached to longitudinal threads to form ceramic screen fastened to external part of ceramic coat - layer of oriented ceramic fibers incorporating lining of ceramic cloth. Crosswise fins are arranges in the form of coil about feather rod. Channels for porous cooling of fibrous ceramic coat are made in rod at screen knots. Blade may optionally have lock joint of metal fins and ceramic threads. EFFECT: improved blade protection against corrosion due to displacement of combustion products from fibrous ceramic coat by air. 23 cl, 18 dwg