BLADE ROOT, CORRESPONDING BLADE, ROTOR DISC, AND TURBOMACHINE ASSEMBLY

摘要

In accordance with the invention there is provided a blade root comprising of a plurality of lobes and fillets and flanks in between, in which a shoulder is provided between the flanks and the fillets to increase the distance to a corresponding lobe of a corresponding rotor disc into which a blade with such a blade root is inserted. The invention is also directed to rotor blade having such a blade root. Furthermore this feature may alternatively or additionally also be applied to a rotor disc slot of a rotor disc, such that a flank of the rotor disc slot merges into a fillet of the rotor disc slot via a soft shoulder to increase the distance to a corresponding lobe of a blade root. Besides, an inventive shoulder could also be applied to both the blade root and the corresponding slot of the rotor disc.