Patent ID: 8172503
Filing Date: 2012-05-08
Classification: F01D,F05D,F16C

Abstract:
1. A turbomachine comprising: a shaft mounted in a shaft housing, said housing having a ventilation connector which is connected with a low pressure region of the turbomachine; at least one rotor disposed in a rotor housing, said rotor housing being overhung at one end of the shaft, for compression, expansion, or transport of a working gas; and at least two hydrostatic, gas-lubricated bearings for mounting the shaft in the shaft housing, said bearings having a connector to a compressed gas line that is connected with a pressure region of the turbomachine, wherein the bearings are each configured as combined axial/radial bearings, wherein a portion of working gas that is passed from the pressure region through the compressed gas line is applied to the bearings by way of a branched connector and blown into pockets for a radial bearing effect and axial bearing effect, by means of nozzles, wherein the pockets for the radial bearing effect interact directly with an assigned surface of the shaft and the pockets for the axial bearing effect interact directly with an assigned bearing disc disposed on the shaft, thereby guaranteeing support of the shaft even during startup of the turbomachine, and guaranteeing good rigidity and low sensitivity to pressure surge stresses independent of the speed of rotation, and wherein pressure in the connector to the compressed gas line is at least 10 to 20 bar greater than the pressure in the region of the ventilation connector and the pressure drop essentially occurs over the bearings.