Intermediate element for a blade/rotor disc connection in a rotor of a turbomachine, associated rotor for a turbomachine, and turbomachine

An intermediate element for a blade/rotor disk connection in a rotor of a fluid flow machine, the intermediate element being adapted to a shape of a blade root of a blade and to a blade root slot in a rotor disk for receiving the blade root in such a way that, when in a state arranged between the blade root and the rotor disk, the intermediate element prevents direct contact between the blade root and the rotor disk, the intermediate element comprising, on an outer surface that faces the rotor disk in the state arranged between the blade root and the rotor disk, at least one protrusion configured to reduce an air flow parallel to an axis of rotation of the rotor between the rotor disk and the intermediate element;

• and on an inner surface that faces the blade root in the state arranged between the blade root and the rotor disk, a recess that corresponds to the at least one protrusion on the outer surface of the intermediate element,
• wherein, in the arranged state, the at least one protrusion is arranged in a region of a non-load-bearing flank of the blade root.