SLOW OSCILLATIONS OF UNBALANCED VIBRATION EXCITER WHEN PASSING THROUGH THE RESONANCE ZONE OF VIBRATION MACHINE

Abstract

The problem of occurrence of slow oscillations of velocity of the unbalanced vibration exciter during the passage trough the resonance zone is solved by the method of direct separation of motions; in addition, it is taken into account the effect on the oscillation of the vibration exciter rotor of the moment of gravity of the imbalance. It is also obtained the expression describing oscillations of the vibration exciter velocity in the zone of the Sommerfeld effect. It is shown that slow oscillations of the vibration exciter are caused by a resonant increase in value of braking vibration moment. It was found out that  amplitudes of slow oscillations of the rotor velocity in cases of taking into account the action of the moment of gravity and neglecting it, will be approximately the same. Computer simulation confirms the obtained results.