JET-DEFLECTOR COOLING OF OPERATING OR GUIDING TURBINE BLADES Russian patent published in 2017 - IPC F01D5/18 F01D5/20 

FIELD: machine engineering.

SUBSTANCE: invention relates to the turbine unit (10, 10a) comprising generally a hollow blade (12) and, at least, one deflector device (14, 14a, 14d), wherein the hollow blade (12) has, at least, the first side wall (16, 18) extending from the input edge (20) to the output edge (22) of the hollow blade (12) and, at least, one cavity (24), in which the said, at least, one deflector device (14, 14a, 14d) is located in the assembled state of the said, at least, one deflector device (14, 14a, 14d) in the hollow blade (12), at the predetermined distance to the inner surface (26) of the cavity (24) for jet-deflector cooling of, at least, one inner surface (26), and to form a flow channel (28) for the cooling medium (30) extending from the input edge (20) to the output edge (22), and wherein the said, at least, one deflector device (14, 14a, 14d) comprises the first part (42) and the second part (44) located side by side in the axial direction (78), wherein the second part (44) is located behind the first part (42), when viewed in the axial direction (78), and with axial distance from each other with the formation of the first flow passage (46), providing passage from one side of the blade (12) to the opposite side of the blade (12). The turbine unit (10, 10a) comprises, at least, the first locking member (32, 32b-d; 34, 34a), which is located in the flow channel (28) between the the second part (44) of the said, at least, one deflector device (14, 14a, 14d) and the said, at least, first side wall (16, 18) of the hollow blade (12) to minimize the cooling medium temperature supply to the blade and to increase the efficiency of jet-deflector cooling. The said, at least, first side wall (16, 18) is located on the backrest (36) of the hollow blade (12) to block the cooling medium flow (30) in the direction from the input edge (20) to the output edge (22) of the hollow blade (12) by preventing access to the section (94) of the flow channel (28) downstream behind the first locking member (32, 32b-d; 34, 34a) by directing the cooling medium (30) in the first flow passage (46) from the backrest (36) to the trough (38) of the hollow blade (12).

EFFECT: increasing the cooling efficiency.

16 cl, 7 dwg