DAMPER SEAL OF THE GAS TURBINE IMPELLER Russian patent published in 2022 - IPC F01D5/26 F01D11/00 

FIELD: power plant engineering.

SUBSTANCE: invention relates to the field of power plant engineering, specifically turbine engineering, in particular to the design of impellers of cooled stages of gas turbines. The damper seal of the gas turbine impeller is tightly placed in the cavity between the shelves of the adjacent working blades and the protrusion of the impeller disk and divides the specified cavity into side channels. The damper seal has a contact surface facing the surfaces of the working blade shelves and a non-contact surface adjacent to the surface of the disk protrusion. The non-contact surface is provided with a fixing protrusion dividing the specified surface into two parts, while a transverse groove is made on each of the parts of the non-contact surface adjacent to the fixing protrusion and connecting the side channels.

EFFECT: increase in the cooling efficiency of the damper seal and the impeller disk, a decrease in the temperature level of the disk, a decrease in the consumption of cooling air supplied to the impeller of the gas turbine, an increase in the efficiency of damping the vibrations of the working blades, which together provides an increase in efficiency and higher reliability of the gas turbine.

3 cl, 6 dwg