TURBINE NOZZLE DIAPHRAGM SECTOR, METHOD OF FABRICATING SAID TURBINE NOZZLE DIAPHRAGM SECTOR, AND GAS TURBINE ENGINE

摘要

FIELD: engines and pumps.;SUBSTANCE: turbine nozzle diaphragm sector comprises segments of inner and outer sites with one or several hollow vanes arranged there between. Every vane comprises rear edge cavity to receive cooling air and to communicate with several vent channels distributed along said rear edge. Said vent channels serve to remove a portion of cooling air. Said cavity comprises outer hole extending through outer site segment to communicate with air outlet. Said air outlet extends through part that covers outer hole and is secured to outer site segment. Said vent channels serve to remove a portion of cooling air. Invention covers also method of making comprising: making above described sector. Protective coating is applied on said sector by saturation from gas phase so that one portion of gas used for application passes through said air outlet while cavity walls at hole end are coated by protective coating. Invention covers also gas turbine engine including, at least, one turbine equipped with said nozzle diaphragm composed of several above described sectors.;EFFECT: reduced high-temperature corrosion of rear edge cavity.;9 cl, 4 dwg