基于DEM-FEM耦合的环锤式破碎机反击板可靠性分析  

Reliability analysis of ring hammer crusher’s counterattack plate based on DEM-FEM coupling

作　　者：杨硕 闫军[1] 刘志勇 YANG Shuo;YAN Jun;LIU Zhiyong(School of Mechanical Engineering,Inner Mongolia University of Technology,Huhehot 010051)

机构地区：[1]内蒙古工业大学机械学院,内蒙古呼和浩特010051

出　　处：《机械设计》2024年第7期114-120,共7页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51865044);内蒙古自治区自然科学基金资助项目(2018LH05039)。

摘　　要：由于环锤式破碎机破碎物料的过程是一个极其复杂多变的过程,且与反击板所受的碰撞力是不连续、无规则的,因此,无法使用公式推导或使用单一软件对反击板受力进行计算,为了能够更好地确定破碎机破碎过程中反击板的载荷大小、分布和寿命,文中提出了一种基于离散元(DEM)和有限元(FEM)耦合计算的环锤式破碎机反击板可靠性分析方法,通过EDEM建立环锤式破碎机破碎物料仿真过程,并提取出破碎过程中反击板的载荷分布,与ANSYS Workbench建立耦合计算通道,计算得到在正常工作参数下反击板的受力大小和位置,在此基础上采用n Code Design Life疲劳分析软件对反击板进行寿命分析,得到反击板的受力云图和损伤云图,研究转子转速、反击板倾角、转子与筛板距离等不同因素下对反击板可靠性的影响,结果表明:转子转速为1000 r∕min时反击板的最大受力值为247.9 MPa、反击板角度为60°时应力最大值为206.48 MPa、转子与筛板距离为530 mm时受力最大值为268.37 MPa。Since the process of crushing materials by the ring hammer crusher is extremely complex and changeable,and the collision force exerted on the counterattack plate is discontinuous and irregular,it is impossible to use formula derivation or employ a single software to calculate the force exerted on the counterattack plate.In this article,in order to better determine the counterattack plate’s load size,distribution and service life in the crushing process,the method of reliability analysis on the ring hammer crusher’s counterattack plate is proposed based on the coupling calculation of DEM(discrete element)and FEM(finite element).The simulation process of crushing materials is set up with the help of EDEM,and the counterattack plate’s load distribution in the crushing process is extracted.The coupling-calculation channel is established by means of ANSYS Workbench,and efforts are made to calculate the force size and position of the counterattack plate with normal working parameters.On this basis,the nCode Design Life fatigue analysis software is used to conduct the analysis on the counterattack plate’s service life,and both the force cloud diagram and the damage cloud diagram are identified.The influence of different factors on the counterattack plate’s reliability is explored,such as the rotor speed,the inclination angle,as well as the distance between the rotor and the sieve plate.The results show that the maximum force exerted on the counterattack plate is 247.9 MPa when the rotor speed is 1000 r∕min,the maximum force is 206.48 MPa when the counterattack plate’s inclination angle is 60°,and the maximum force is 268.37 MPa when the distance between the rotor and the sieve plate is 530 mm.

关 键 词：DEM-FEM耦合 仿真 反击板 可靠性 

分 类 号：TG156[金属学及工艺—热处理]