COOLED TURBINE Russian patent published in 2014 - IPC F01D5/18 F02C7/16 

FIELD: machine building.

SUBSTANCE: cooled turbine comprises working wheel with working blades that have two cooling circuits. Said circuits are communicated with working wheel air channels and independent circular diffuser channels made at working wheel surface. Said diffuser channels are communicated with distributor swirlers and transit air duct at their inlet. Besides, it has nozzle blades, heat exchanger and transit air ducts. Every nozzle blades is composed of a structural element confined by top and bottom shrouds and space there between confined by blade root convex and concave walls in the form of leading edge and distribution chamber arranged along blade root axis. Leading edge distribution manifold inlet is communicated with combustion chamber air chamber while its outlet communicates via perforations with turbine flow section. Heat exchanger inlet communicates with combustion chamber air chamber and its outlet communicates with air manifold and distribution chamber. This turbine incorporates distribution manifold for cooling air, cooling deflector and two transit deflectors arranged in said distribution chamber in its axis with clearance between each other and relative to blade root concave and convex wall to make cooling channels along said walls. Cooling deflector has perforated bores on its two opposite walls and arranged in distribution chamber at distribution manifold wall and gas its perforated wall directed to nozzle blades root concave and convex walls. Blade top and bottom shrouds have air ducts their inlets being communicated with turbine flow section. Distribution cooling air manifold is connected with air source, top shroud air duct inlet and cooling deflector inlet. Air duct inlet in bottom shroud is connected with cooling deflector outlet. Air manifold is connected with inlet of transit deflectors while transit air ducts are connected with outlet of transit deflectors and swirling nozzle blades communicated with circular diffuser channels. Distribution chamber communicates the turbine flow section.

EFFECT: longer life, higher reliability and efficiency.

7 cl, 5 dwg