Dynamic analysis of new type elastic screen surface with multi degree of freedom and experimental validation  

作　　者：宋宝成 刘初升 彭利平 李珺 

机构地区：[1]School of Mechanical and Electrical Engineering, China University of Mining and Technology [2]Xuyi Research and Development Center of Mining Equipment and Materials,China University of Mining and Technology

出　　处：《Journal of Central South University》2015年第4期1334-1341,共8页中南大学学报（英文版）

基　　金：Project(51221462)supported by the National Natural Science Foundation of China for Innovative Research Group;Project(20120095110001)supported by the Doctoral Fund of Ministry of Education of China;Project supported by the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions,China;Project(CXJJ201303)supported by the Innovation Foundation of Xuyi Research and Development Center of Mining Equipment and Materials,China University of Mining and Technology,China

摘　　要：A feasible method was proposed to improve the vibration intensity of screen surface via application of a new type elastic screen surface with multi degree of freedom(NTESSMDF). In the NTESSMDF, the primary robs were coupled to the main screen structure with ends embedded into the elastomers, and the secondary robs were attached to adjacent two primary robs with elastic bands. The dynamic model of vibrating screen with NTESSMDF was established based on Lagrange's equation and the equivalent stiffnesses of the elastomer and elastic band were calculated. According to numerical simulation using the 4th order Runge-Kutta method, the vibration intensity of screen surface can be enhanced substantially with an averaged acceleration amplitude increasing ratio of 72.36%. The primary robs and secondary robs vibrate inversely in steady state, which would result in the friability of materials and avoid stoppage. The experimental results validate the dynamic characteristics with acceleration amplitude rising by62.93% on average, which demonstrates the feasibility of NTESSMDF.A feasible method was proposed to improve the vibration intensity of screen surface via application of a new type elastic screen surface with multi degree of freedom（NTESSMDF）. In the NTESSMDF, the primary robs were coupled to the main screen structure with ends embedded into the elastomers, and the secondary robs were attached to adjacent two primary robs with elastic bands. The dynamic model of vibrating screen with NTESSMDF was established based on Lagrange＇s equation and the equivalent stiffnesses of the elastomer and elastic band were calculated. According to numerical simulation using the 4th order Runge-Kutta method, the vibration intensity of screen surface can be enhanced substantially with an averaged acceleration amplitude increasing ratio of 72.36%. The primary robs and secondary robs vibrate inversely in steady state, which would result in the friability of materials and avoid stoppage. The experimental results validate the dynamic characteristics with acceleration amplitude rising by62.93% on average, which demonstrates the feasibility of NTESSMDF.

关 键 词：vibrating screen elastic screen surface multi degree of freedom dynamic analysis mesh stoppage prevention 

分 类 号：O326[理学—一般力学与力学基础]