【摘要】：振動式給料機在礦山、冶金等各個領域都有廣泛的應用,其穩(wěn)定性和工作效率的提高對給料系統(tǒng)的效率提高都有重大的意義�，F(xiàn)在,振動式給料機正向著高效率、高精度的方向發(fā)展,因此對其在動態(tài)特性方面的高要求有著重要的意義。在生產實踐中,振動式給料機易出現(xiàn)減震彈簧損壞、樓面基礎振動較為激烈且振動電機較容易破壞等故障。因此,需要對振動給料機進行動力學分析,找出原因,為進一步改進振動給料機提供良好的理論基礎。 本文以某重工集團140T型號為ZD-1490×2580的電機振動式給料機為研究對象,結合實際工作情況,為提高電機振動式給料機的生產穩(wěn)定性和改善給料機的動態(tài)特性,進行必要的研究。主要工作是對ZD-1490×2580型號的電機振動式給料機的給料箱進行動力學分析與研究,并對其進行結構改造。 本文采用ANSYS有限元分析軟件,在進行動力學分析之前,首先建立了ZD-1490×2580型電機振動式給料機的給料箱、等效電機等部分及整個系統(tǒng)的有限元分析模型,再進行模型的動力學分析研究。具體的工作如下： 第一,在ANSYS經典界面中使用板、殼及線對振動式給料機系統(tǒng)進行建模,再用ANSYS的網格劃分模塊對模型做網格的劃分,從而生成有限元分析模型。 第二,在模態(tài)分析中選用Block Lanczos算法對給料機的物理模型進行模態(tài)分析,得出前30階有載荷及無載荷時的固有頻率和振型。經過分析比較,可以獲得該給料機耦合振動的情況,判斷其是否滿足亞共振的工作狀態(tài)。在模態(tài)分析的基礎上,用ANSYS軟件對振動式給料機做諧響應分析,可求出所選節(jié)點的幅頻動態(tài)響應曲線。結合模態(tài)分析和諧響應分析,便得出該振動式給料機可能會在20Hz、30Hz和40Hz三個頻率點附近出現(xiàn)共振現(xiàn)象。 第三,結合振動式給料機實際工作中給料量不足的情況,對其框架系統(tǒng)進行了結構改進,將上部框架與底板剖分開,中間采用軟聯(lián)接。改進后只有底板參與電機的振動,參振質量由改進前的3.8t,降為1.6t,降低了2.2t,從而解決了給料量不足的部分原因,符合實際生產要求。
[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.
【學位授予單位】：遼寧科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TH237.1

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本文編號：2190031