Patent ID: 8459951

Claim:
A rotor for a turbomachine which is exposable to an axial throughflow, comprising: a plurality of rotor disks arranged in a stacked manner and which are clamped to each other using a tie rod, each rotor disk including an outside diameter, wherein at least two of the plurality of rotor disks includes a smaller outside diameter than one of the adjacent rotor disks and an existing diameter difference is compensated using a drum which annularly encompasses the two rotor disks with the smaller outside diameter, wherein an entire axial extent of the at least two rotor disks with the smaller outside diameter is encompassed by the drum, and wherein on an inner face of the drum there is an endlessly encompassing web which is axially clamped between the two encompassed rotor disks, wherein the web of the drum extends radially further inwards than the rotor disk with the smaller outside diameter, and wherein the web includes an axial width such that the web at least partially extends into a hub opening whereby the hub opening is a gap between the two rotor disks with the smaller outside diameter.