Patent ID: 7311003
Filing Date: 2007-12-25
Classification: G01M

Abstract:
1. A method of balancing journal-less rotors, in which a rotor with a bore hole is arranged on a bearing mandrel of a balancing device and fluid is brought between rotor and bearing mandrel surfaces which are opposite each other, and the rotor is put into rotation, imbalance-induced oscillations of the bearing mandrel being used to determine the imbalance, wherein the rotor is supported in a first bearing region in the radial direction hydrostatically by means of a liquid and in a second bearing region in the axial direction by means of fluid, and delivery and removal are at least partly carried out via the inside of the bearing mandrel; wherein the bearing mandrel comprises first openings connected to delivery conduits for the fluid and second openings connected to removal conduits for the fluid; wherein the first and second openings are each connected to conduit portions which run transversely to the bearing mandrel axis and conduit portions which run parallel to the bearing mandrel axis; and wherein the conduit portions of the delivery conduits have choke portions with a small cross-section.