FORK-SHAPED SHANKS OF OPERATING BLADES Russian patent published in 2019 - IPC F01D5/30 

FIELD: heat power engineering.

SUBSTANCE: invention relates to the power engineering, blade rings with forked shafts of steam and gas turbine blades. Blade of the steam turbine includes blades, each of which has a forked shank and is installed on the disk. Disk is made with a staggered arrangement of openings in two rows, at the same time, the blades have two types of liners alternately installed on the disc. First type of shank has the opening that is located on the upper row of disc openings and the part that is thickened in the circumferential direction, and the second type has the part that is thinned in the circumferential direction, as well as the opening that is located in the lower row of the disc openings and the part thickened in the circumferential direction. In cross section along the radius of the opening in the shank of the wall of the latter on each side of the opening they have the same thickness.

EFFECT: invention allows to reduce the stress concentration in the disk, to exclude the eccentric bend of the shank, as well as to improve the maintainability and load-bearing capacity of the shanks.

1 cl, 1 dwg