140T电机振动式给料机给料箱有限元分析及结构改进

发布时间：2018-08-18 16:29

【摘要】：振动式给料机在矿山、冶金等各个领域都有广泛的应用,其稳定性和工作效率的提高对给料系统的效率提高都有重大的意义。现在,振动式给料机正向着高效率、高精度的方向发展,因此对其在动态特性方面的高要求有着重要的意义。在生产实践中,振动式给料机易出现减震弹簧损坏、楼面基础振动较为激烈且振动电机较容易破坏等故障。因此,需要对振动给料机进行动力学分析,找出原因,为进一步改进振动给料机提供良好的理论基础。本文以某重工集团140T型号为ZD-1490×2580的电机振动式给料机为研究对象,结合实际工作情况,为提高电机振动式给料机的生产稳定性和改善给料机的动态特性,进行必要的研究。主要工作是对ZD-1490×2580型号的电机振动式给料机的给料箱进行动力学分析与研究,并对其进行结构改造。本文采用ANSYS有限元分析软件,在进行动力学分析之前,首先建立了ZD-1490×2580型电机振动式给料机的给料箱、等效电机等部分及整个系统的有限元分析模型,再进行模型的动力学分析研究。具体的工作如下：第一,在ANSYS经典界面中使用板、壳及线对振动式给料机系统进行建模,再用ANSYS的网格划分模块对模型做网格的划分,从而生成有限元分析模型。第二,在模态分析中选用Block Lanczos算法对给料机的物理模型进行模态分析,得出前30阶有载荷及无载荷时的固有频率和振型。经过分析比较,可以获得该给料机耦合振动的情况,判断其是否满足亚共振的工作状态。在模态分析的基础上,用ANSYS软件对振动式给料机做谐响应分析,可求出所选节点的幅频动态响应曲线。结合模态分析和谐响应分析,便得出该振动式给料机可能会在20Hz、30Hz和40Hz三个频率点附近出现共振现象。第三,结合振动式给料机实际工作中给料量不足的情况,对其框架系统进行了结构改进,将上部框架与底板剖分开,中间采用软联接。改进后只有底板参与电机的振动,参振质量由改进前的3.8t,降为1.6t,降低了2.2t,从而解决了给料量不足的部分原因,符合实际生产要求。
[Abstract]:Vibrating feeder has been widely used in mining, metallurgy and other fields. The improvement of its stability and working efficiency is of great significance to the improvement of feed system efficiency. At present, vibrating feeder is developing towards high efficiency and high precision, so it is of great significance to require high dynamic characteristics. In production practice, vibration feeder is prone to vibration absorption spring damage, floor foundation vibration is more intense and vibration motor is easy to destroy and so on. Therefore, it is necessary to analyze the vibration feeder dynamics, find out the reason, and provide a good theoretical basis for further improvement of the vibration feeder. In this paper, a 140T motor vibrating feeder of ZD-1490 脳 2580 in a certain heavy industry group is taken as the research object. Combined with the actual working conditions, the necessary research is carried out to improve the production stability of the motor vibrating feeder and improve the dynamic characteristics of the feeder. The main work is to carry on the dynamics analysis and research to the feed box of the motor vibrating feeder of ZD-1490 脳 2580 model, and carry on the structural transformation to it. In this paper, the finite element analysis model of feed box, equivalent motor and the whole system of ZD-1490 脳 2580 vibrating feeder is established before dynamic analysis by using ANSYS finite element analysis software. Then the dynamic analysis of the model is carried out. The main work is as follows: firstly, the vibrating feeder system is modeled by plate, shell and line in the ANSYS interface, and then the finite element analysis model is generated by using ANSYS's mesh division module. Secondly, in modal analysis, Block Lanczos algorithm is used to analyze the physical model of feeder, and the natural frequency and mode shape of the first 30 orders with and without load are obtained. Through analysis and comparison, the coupling vibration of the feeder can be obtained and the working state of sub-resonance can be judged. On the basis of modal analysis, the harmonic response of vibrating feeder is analyzed by ANSYS software, and the dynamic response curve of the selected node can be obtained. Combined with modal analysis and harmonic response analysis, it is concluded that resonance may occur near the three frequency points of 20Hz / 30Hz and 40Hz. Thirdly, considering the shortage of feed quantity in the actual work of vibratory feeder, the structure of the frame system is improved, the upper frame and the bottom plate are divided into two parts, and the soft connection is adopted in the middle. After improvement, only the bottom plate takes part in the vibration of the motor, and the damping quality is reduced from 3.8 t to 1.6 t, which reduces 2.2 t, which solves some of the reasons for the shortage of feedstock and meets the actual production requirements.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH237.1

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