Patent ID: 7211921

Claim:
A machine having a rotor mounted rotatably about an axis of rotation, comprising: a rotor outer casing fixed to axial rotor shaft parts, surrounding a winding support having a superconductive winding; a holding unit to support the winding within the rotor outer casing, including: a first connecting device having a low thermal conductivity, formed on a torque-transmitting side, between the winding support and the rotor outer casing, and a second connecting device provided on an opposite side to compensate for changes caused by axial expansion of the winding support, the second connecting device having at least one axially extending connecting element of low thermal conductivity rigidly connected to the winding support on one end, and connected to at least one centering holding element of the rotor outer casing in an axially moveable and radially force-fitting manner on an opposite free end, wherein the free end of the axially extending connecting element is provided with a metal supporting ring which projects into an opening of the holding element and slides in a play-free manner such that the metal supporting ring and the holding element slide against one another in an axial direction, and the metal supporting ring is formed of a different material from the axially extending connecting element such that a material of the metal supporting ring is a hardened steel and a material of the axially extending connecting element is a fiber-reinforced plastic material; and cooling and thermally insulating units for the superconductive winding.