| Summary: | The rationality and stability of the vibrating flip-flow screen have a great influence on its screening performance and processing capability.In this paper,we established a mechanical model to reflect its vibration characteristics based on the theory of double-body damping linear vibration.Through mathematical and dynamic analysis,the main dynamic parameters such as:damping ratio <i>ξ</i><sub>2</sub>,eccentricity mass moment <i>M</i><sub><i>r</i></sub>,shear stiffness <i>k</i><sub>2<i>x</i></sub>,and mass ratio <i>μ</i> (mass ratio of floating screen frame and main screen frame) on the amplitude-frequency characteristics of the operating point are verified through tests.The results show that the damping ratio has negligible influence on the relative amplitude in the frequency domain,and the mass ratio <i>μ</i>≈0.3 is appropriate,which could not increase the mass of the vibrating flip-flow screen,but also reduce the impact of the material on the vibration system.Adjusted shear stiffness could make the working condition in the stable frequency domain;Increasing or decreasing the eccentricity mass moment can increase or decrease the relative amplitude linearly.The method of first regulating <i>μ</i>,then adjusting <i>k</i><sub>2<i>x</i></sub>,and finally increasing or decreasing <i>M</i><sub><i>r</i></sub> is proposed to ensure that the industrial flip-flow screen is located in a stable frequency domain when a reasonable relative amplitude is achieved.This improves the theoretical and technical support of the vibrating flip-flow screen.
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