Effect of Self-adjustable Inertial Exciter on Resonance in Stopping Period of Square Plansifter
QIU Ming1; LIAO Zhenqiang1; JIAO Weidong2; FAN Lixia1
1.school of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094; 2. Zhengzhou Airplane Equipment Company, Zhengzhou, 450005
Abstract：The method of numerical computation is employed to design a novel inertial exciter whose eccentric distance is self-adjustable for eliminating resonance in square plansifter during stopping process. Considering the mechanical characteristic of three-phase asynchronous motor and the friction torque of bearing, the nonlinear dynamic model of the system which consists of the body of sifter, the suspenders and the exciter is established. Since the eccentric distance of exciter is unchangeable and self-adjustable respectively, the four-order Runge-Kutta method is applied to compute the stopping process. The law of influence of the initial eccentric distance, stiffness and damping of the new exciter on the stopping time is analyzed. The results show that the maximum instantaneous amplitude and the stopping time can be greatly shortened during stopping period by the novel exciter which has the appropriate parameters, and the moderate initial eccentric distance can obtain robust vibration absorbing.
2010, Vol. 29 
