The Self-Synchronization Theory Of A Dual Mass Vibration System With Two Motors Drives

The self-synchronous phenomena of unbalance rotors provides a new way for the application of the vibration technology, and results in the establishment of the vibration utilization engineering. At present, a variety of vibration machinery has been widly used in industry, such as self-synchronous vibrating conveyors, self-synchronous vibrating feeders, self-synchronous probability screens, etc. However, some machines transfers large dynamic load to base in vibration direction, then it is necessary to do vibration isolation processing for improving the vibration isolation performance of the vibration system and the vibration system is designed to doule -body vibration system. Therefore, it is significant to research the influence of each parameter of the vibration system to the achievement of steadily self-synchronous phenomenon of two unbalance rotors.The self-synchronization theory of a dual mass vibration system with two motors drives was investigated in this paper. The dynamic model of the vibration system was established and the conditions of achiving the self-synchronization and motion stability of the vibration system with two co-rotating and counter-rotating motors were obtained firstly. Then the numerical simulations were used to investigate the self-synchronous motion characteristic. And the effects of the system parameters and disturbance on the self-synchronization were also investigated by the numerical simulations. The accuracy and effectiveness of numerical simulations were finally validated by experiments. The works in this paper are described as follows:(1) Based on the dynamic model of the dual mass vibration system with two co-rotating or two counter-rotating motors, the motion differential equations of the vibration system driven by two co-rotating or two counter-rotating motors were obtained by Lagrange equation.(2) The Hamiton principle was used to deduce the conditions of achieving self-synchronizaiton and its motion stability of the dual mass vibration system with two co-rotating or two counter-rotating motors.(3) The mathematical model of electromagnetic torque of a 3-phase squirrel cage asynchronous motor was established. And the simulations on the dual mass vibration system with two co-rotating motors or two counter-rotating motors were carried out to analyze the self-synchronous motion characteristic under different working conditions. And the effect of the system parameters, such as the installation position of the two motors, the mass ratio of the two eccentric rotors, the power supply frequency difference of the two motors, the initial conditions of the system and disturbance, on the self-synchronization of the dual mass vibration system were also researched by the numerical simulations.(4) The self-synchronization vibrating test-bed was established, and the experiments on the self-synchronization of the test-bed with two co-rotating or two counter-rotating motors were conducted by using the B&K vibration test system. And the effect of the system parameters, such as the mass ratio of the two eccentric rotors, the power supply frequency difference of the two motors, on the self-synchronization of the dual mass vibration system were tested by adjust the overlap angle of the eccentric rotors and the power supply frequency of the motors. The accuracy and effectiveness of numerical simulations were finally validated by contrast the results of numerical simulations and experiments.