Sealing to the blade shaft of a rotor stage of an axial flow machine

Sealing device (1) to a blade shaft (4) of a rotor stage of an axial-flow machine, wherein a plurality of blades adjacent to each other in the circumferential direction on a rotor (5) are angeordnt and wherein the sealing device (1) on the blade shaft (4) in the axial direction protruding bottom plates and in the radial ', which form a double seal in the axial direction, characterized in that to the bulkhead from the bottom plate (7, 7 in the direction extending along the blade shaft (4), partition walls (7, 7) ") is preferably a rounded or a parbolischer transition cross-section is provided, wherein at least one of the bulkhead walls (7, 7 ') with respect to the Schaufelfusrandes (14, 14') in the direction of the radial axis (13) of the blade shaft (4) is offset. The present invention provides a reduction in the centrifugal forces initiated by torsion or voltages at the ends of the partition walls is achieved on the blade root, which enables a reduction in the Schaufelfuslange in the axial direction. This enables a more cost-effective production of the components, less material stress of the component, an improved performance of the turbo machine as well as a reduced fracture risk in the case of Plattenscherung during operation of the turbomachine.