TURBINE BLADE Russian patent published in 1997 - IPC

FIELD: gas-turbine engines for power engineering. SUBSTANCE: coating on feather rod has ceramic rib oriented along blade feather. Rib is reinforced with ceramic fibers arranged crosswise of it in the form of one or more layers continuously embracing feather contour. Rib incorporates ceramic insert; layer of crosswise ceramic fibers is applied to insert surface. Insert is reinforced by longitudinal ceramic fibers. Layer of crosswise ceramic fibers is made as winding whose turns are fitted onto feather rod. Turns are formed by thread, harness, or ribbon made of ceramic fibers. Ceramic rib may form entrance and exit edges of blade and also sections of blade back. Rib may be hollow. Rod surface under rib may be corrugated and oriented across rib. Corrugations are varying lengthwise in depth and its maximum is under central part of ceramic rib contour. EFFECT: improved strength of blade. 14 cl, 19 dwg, 1 tbl