Dynamic Performance And Fatigue Analysis Of Banana-shaped Vibratory Screen

As a type of commonly used screening equipment, vibratory screen is widely used in mining and screening process of various resources. Depending on different industries, the need of screening method can be different which developing different trajectories of screening machinery. As a type of linear vibratory screen, the banana-shaped vibratory screen has low energy consumption, high efficiency, simple structure characteristics. Vibratory screen is widely used in mine, coal, smelting, building materials and other industries. With the development of economy and the constant renewal of technology, the surveys upon vibration screening machinery have drawn more and more attentions. The emphasis place not only on finer division, stricter specification, but also on higher standards of performance and fatigue life. Due to the long-term action of erosion from material and dynamic cycle loads, components are easy to produce fatigue problem. For the less research on fatigue research of vibratory screen, the subject has a far-reaching significance.Schenck SLO2461 banana-shaped linear vibratory screen is the object to be discussed. The main structure and working principle of vibratory screen are introduced. The relevant dimensions of vibratory screen are obtained by drawing. The components of vibratory screen are three-dimensional modeled by SolidWorks. Three-dimensional model of vibratory screen is achieved by assembly between components on the premise that there has no interference.The three-dimensional model of vibratory screen is corresponding simplified for balancing the efficiency and making the results more correct in the process of finite element analysis. The finite element analysis model will be obtained after the material properties, the constraints definite and meshing done. The natural frequencies and shapes are obtained by modal analysis of vibratory screen combining with ANSYS software. The rationality of structure can be proved by its avoiding resonance. After harmonic response analysis, the displacement response at different frequencies, stress response under working frequency and stress results of the dangerous position are obtained.The converted vibration mass, spring stiffness and system damping are calculated by the analysis of dynamic parameters. Then, a dynamic model of vibratory screen is established. According to the established dynamic model and three-dimensional model, the displacement, velocity and acceleration curve of vibratory screen are obtained by MATLAB software. The low order natural frequency and shapes are also obtained compared to the results of ANSYS software.According to the stress state of vibratory screen, the constraints among parts are redesigned by ADAMS software. After the driving force imposed, the motion simulation results are obtained. The load-time-history curves show the relationship between time and load.S-N curve is drawn according to characteristics of the material. Combining with its load-time-history curve, finite element analysis result and S-N curve, the fatigue life contour is obtained by DesignLife software through particular process.According to the correlation analysis in dynamic performance and fatigue life of banana-shaped vibratory screen, the practice can be better guided so as to improve its life.