Study on Fault Characteristics of Rotor-to-stator Rub-impact for Rolling Mechanism

The rub-impact of rotor-to-stator often occurs for high speed rotating machinery. The paper bases on Jeffcott rotor as model, and has set up differential coefficient equation. Numerical integral results indicate that different forms of rub-impact are taken on with the change of unbalance force and speed ratio. Meanwhile rotor to stator rub takes on abundant frequency characteristics. Rubbing-impact vibration of turbine shaft is also analyzed in detail based on the simulate test. The results of the test are identical with the theoretic contribution and help to diagnose and restrain rubbing-impact between stator and rotor for the plant.