Patent ID: 7278818
Filing Date: 2007-10-09
Classification: F01D,F04D,F16C

Abstract:
1. Turbomachine for low-temperature applications, comprising: a housing; a rotor shaft mounted in the housing; an impeller disposed on one end of the rotor shaft, to which a cold gas is applied, wherein a cold zone (K) forms within the housing in an impeller-side end of the housing during operation of the turbomachine, and a warm zone (W) forms at an end of the housing facing away from the impeller; an electrical machine integrated into the housing, said electrical machine comprising a rotor disposed on the rotor shaft and stator windings disposed in the housing; at least two compressed gas connectors for a compressed gas, one of said connectors being disposed on a housing segment assigned to the cold zone (K), and the other of said connectors being disposed on a housing segment assigned to the warm zone (W); at least two valve devices, each valve device being assigned to a respective one of the compressed gas connectors, said valve devices alternately connecting each compressed gas connector with a compressed gas feed line or an outflow line; and a control device connected to the valve devices, said control device establishing a flow-through direction for the compressed gas on the basis of temperatures occurring in the cold zone (K) and the warm zone (W), and controlling the valve devices accordingly.