Identification method of unbalanced fault characteristics of horizontal shaft of rotary table of drilling rig

Abstract The horizontal shaft of rotary table is an important rotating part drilling rig. vibration caused by the mass imbalance will seriously affect normal operation rig and lead to faults. Therefore, taking rotor system as research object, unbalanced characteristics are extracted improved all-phase fast Fourier transform method. Through cross-correlation signal, data discrete signal weighted superimposed, amplitude, time delay phase spectrum analysis can be obtained. experimental results show that accuracy stability amplitude method better, extraction reach 98%, which verifies effectiveness proposed