ANALYSIS ON THE STEADY STATE VIBRATION PROPERTIES OF ROTOR SYSTEMS CONNECTED WITH MISALIGNED GEAR COUPLING

In the rotor system connected with a gear coupling, misalignment is a commonly mechanical fault that can cause excessive vibration. In this work, the dynamics of bearing rotor system connected with a misaligned gear coupling and the dynamic forces generated by the coupling due to the misalignment are analyzed. The theoretical analysis shows the misalignment forces are from the inertia force of the sleeve and the internal damping between the teeth. The amplitudes of the steady state vibration of the system are related to the misalignment, internal damping, the rotating speed, and the structural parameters of the coupling. Numerical analysis reveals that the even integer multiples of lateral vibration and the odd integer multiples of torsional vibration are occurred in the misaligned system, and the integer multiples of vibration are apparent around the gear coupling.