Vibroimpact regimes and stability of system “Rotor—Sealing Ring”

Vibroimpact interaction between rotor and floating sealing ring is studied. The two-mass model “high-speed rotor—sealing ring” is considered. The model includes an unbalanced flexible rotor with elastic bearings. The rotor rotates inside the floating sealing ring. The ring is able to contact with the casing. The hydrodynamic forces in the clearance between the rotor and the ring as well as the dry friction between the ring and the casing are taken into account. The investigation of flow-coupled vibroimpact oscillations of a rotor and ring are presented. For these regimes, the analytical solution as well as numerical results are obtained. The main dynamic features of these behaviour and stability domains are discussed.