COOLED HIGH-PRESSURE TURBINE Russian patent published in 2017 - IPC F01D5/08 

FIELD: engines and pumps.

SUBSTANCE: cooled high-pressure turbine comprises the impeller in the form of a wheel disc with rotor blades with internal cooling cavities installed thereon, the channels supplying cooling air to the blades, the twisting nozzle apparatus, the bladeless diffuser, the blade-fixing locks and the attachable ring with booster blades. An annular protrusion with a labyrinth installed thereon is made on the impeller disc web. The bladeless diffuser is rigidly fixed on the twisting apparatus, and the attachable ring with booster blades is fixed under the disc rim via the bayonet connection and is equipped with a labyrinth made on the inner ring surface. The bladeless diffuser through cell ring sealings made on its walls is communicated with the labyrinth formed on the impeller annular protrusion and with the labyrinth made on the inner surface of the attachable ring. Grooves for blade-fixing locks are made In the disc rim and the blades feet. The channels supplying air in the blade are made in the form of a groove in the disc under the blade locks, and openings are made opposite the grooves in the disc in the blade-fixing locks from the attachable ring side. The cooling cavities of the blades are sequentally communicated with the channels supplying air in the blade, with the cavities under the attachable ring with booster blades and with the cavities of the bladeless diffuser and the twisting apparatus.

EFFECT: invention allows to improve the reliability and service life of the turbine disc, to reduce its weight, to increase the processability of the turbine components.

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