Loading patent…
AssigneeMTU Motoren- und Turbinen-Union Muenchen GmbH
InventorsAlois Rohra, Walter Wildner
Estimating the term…
A bearing arrangement between shafts of a fluid flow engine, especially including a high pressure turbine and/or a lower pressure turbine, includes a damping gap for the controllable formation of a carrier film between an outer bearing race and a bearing mounting member. A damping fluid is introduced into the damping gap of a squirrel cage bearing. The outer bearing race rotates with an r.p.m. corresponding to that of the high pressure turbine shaft r.p.m. or to that of the low pressure turbine shaft r.p.m. The damping fluid is supplied through a channel passing through the low pressure turbine shaft and into an entrapment chamber just at the entrance end of the damping gap, whereby the rotation of the entrapment chamber compresses the damping fluid by a centrifugal force into the damping gap.
An apparatus for damping vibrations in a fluid flow engine, comprising shaft means for supporting engine components, bearing means including an inner bearing race, and an outer bearing race having an outer surface, mounting means for said bearing means having an inner surface facing said outer surface, said outer surface having a smaller diameter than said inner surface for forming a damping gap between said inner and outer surfaces, said damping gap having a fluid flow gap entrance end and a fluid flow gap exit end, fluid flow entrapment chamber means formed around said gap entrance end for accumulating damping fluid in said chamber means, and means for directing a damping fluid flow through said entrapment chamber means into said damping gap, whereby rotation of said entrapment chamber means compresses damping fluid into said damping gap by centrifugal force.
Dependencies are inferred from the claim text.