CERAMIC CORE AND A METHOD FOR MAKING A HOLLOW TURBINE BLADE, USING A CERAMIC CORE AND A GAS TURBINE ENGINE WITH A HOLLOW TURBINE BLADE Russian patent published in 2020 - IPC F01D5/18 B22C9/04 B22C9/10 

FIELD: technological processes; turbines or turbomachines.

SUBSTANCE: ceramic core for casting by melted model of hollow turbine blade of gas turbine engine, having central, first and second side cavities, It comprises parts of the core intended for formation of the first and the second lateral cavities of the blade connected to the part of the core intended for formation of its central cavity. Core has the shape of a single element for formation of cavities, besides, parts of the core are connected by means of ceramic crosspieces of small cross-section located at different heights of the core. To feed cavities of co-cooling air inside and to increase mechanical strength of core part of core, forming first and second side cavities, and part of core forming central cavity, are connected in common shank of core by ceramic bridges. Multiple ceramic crosspieces of small cross-section provide possibility of additional cooling air supply to the blade in advance to preset critical zones of first and second lateral cavities. Another invention of the group relates to use of the above ceramic core for making a hollow turbine blade for a gas turbine engine by casting on a molten model. In production of hollow turbine blade for gas turbine engine by casting on molten model, said ceramic core is made, after which formed ceramic core is installed in place in casting mold and molten metal is poured into casting mold. One more invention of the group relates to gas turbine engine containing hollow turbine blades made by the above method.

EFFECT: group of inventions increases strength of ceramic core and increases service life of blade.

8 cl, 8 dwg