Patent ID: 7798778

Claim:
A wheel for a rotating flow machine, comprising: a rotor on which a plurality of blades are arranged projecting radially from the rotor, with each blade having a root attached to the rotor and a blade top; and a ring arranged concentrically in relation to the rotor outside the blade tops in such a way that the ring and the blades overlap each other when the ring and the blades are viewed in a radial direction, which ring is arranged to be caused to rotate by the blades when the rotor rotates, wherein an extent of the blades in a radial direction and an internal dimension of the ring are matched to each other in such a way that there is a clearance between each blade top and the ring in a radial direction when the rotor is not rotating, wherein the internal surface of the ring has bristles extending radially inwards, for transferring force between the blade tops and the ring via the bristles.