Abstract
Vibrating screen is the pivotal equipment to separate drilling fluid and cuttings during oil exploitation. However, some inherent defects such as low screening efficiency, vibration fatigue and structural failure are observed in the most of conventional vibrating screens with single screen box and same-frequency actuation. For the above-mentioned problems, a newly dynamic vibration absorption device driven by multiple-rotor and double-frequency is designed. To explore the dynamic characteristics of the vibrating device, the vibration isolation performance and the synchronization mechanism are studied in this paper. Firstly, the dynamic equations of the system are established by Lagrangian method. Subsequently, on the basis of averaging method, the synchronization condition and the stability criterion are theoretically deduced. Then, the influence of structure parameters on synchronization and vibration isolation are numerically discussed. Later, the correctness of the theoretical research results is verified by simulation and experiment. Finally, the research results indicate that the synchronization of the vibrating system is mostly determined by mass ratio of the eccentric rotors and mounting position of the motors. Meanwhile, the research results will provide theoretical direction for the design of new vibrating screen.
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