Dynamic Analysis And Parameter Optimization Of Double-Body High-Frequency Vibrating Screen

Aiming at the problem of mis-screening rate of tobacco and unbalance of foam in cigarettes,multilayer tobacco screen has become the mainstream of research and development.Qinhuangdao cigarette factory independent research and development of dual-body high-frequency vibrating screen have some problems: the screen body cracked during the test run,due to low side board leakage will leak material when handling capacity is large.This paper analyzes and optimizes the kinetic parameters of the equipment from the aspects of mechanism dynamics and material movement.The main content includes:On the basis of understanding the structure and principle of the double-body high-frequency vibrating screen,simplify the mechanical model of the structure,establish a three-degree-of-freedom mechanical model,and the dynamic parameters of the simplified model are obtained through experimental measurement and theoretical calculation.Along the main vibration establish a two-degree-of-freedom mechanical model,then establish the motion differential equation by the stiffness method,to solve the natural frequency of the system and the motion response of main vibration type and the upper and lower plastids,and use MATLAB to draw and analyze the amplitude frequency characteristic.The reasonable range of dynamic parameters is obtained through parameter optimization,which provides a theoretical reference for the design and improvement of the equipment.Then analyze the movement state of tobacco,derive the expression of tobacco movement.The trajectory of the steady motion of the tobacco is simulated,the average running speed,number of throwing and screening rate of the horizontal direction of tobacco were calculated.After that analyze the impact of dynamic parameters on projection intensity.Through the material movement analysis,the force of the material on the screen surface was calculated,and the differential equations of the harmonic excitation and thepiecewise linear excitation force were established.Then using MATLAB to solve numerically,obtain the motion response of the system's upper and lower plastids,and analyze the influence of materials on its system.Finally,by combining the influence of tobacco movement status and materials on the system,the equation of height of the sieving side plate is given.