【摘要】：振動(dòng)式給料機(jī)在礦山、冶金等各個(gè)領(lǐng)域都有廣泛的應(yīng)用,其穩(wěn)定性和工作效率的提高對(duì)給料系統(tǒng)的效率提高都有重大的意義�，F(xiàn)在,振動(dòng)式給料機(jī)正向著高效率、高精度的方向發(fā)展,因此對(duì)其在動(dòng)態(tài)特性方面的高要求有著重要的意義。在生產(chǎn)實(shí)踐中,振動(dòng)式給料機(jī)易出現(xiàn)減震彈簧損壞、樓面基礎(chǔ)振動(dòng)較為激烈且振動(dòng)電機(jī)較容易破壞等故障。因此,需要對(duì)振動(dòng)給料機(jī)進(jìn)行動(dòng)力學(xué)分析,找出原因,為進(jìn)一步改進(jìn)振動(dòng)給料機(jī)提供良好的理論基礎(chǔ)。 本文以某重工集團(tuán)140T型號(hào)為ZD-1490×2580的電機(jī)振動(dòng)式給料機(jī)為研究對(duì)象,結(jié)合實(shí)際工作情況,為提高電機(jī)振動(dòng)式給料機(jī)的生產(chǎn)穩(wěn)定性和改善給料機(jī)的動(dòng)態(tài)特性,進(jìn)行必要的研究。主要工作是對(duì)ZD-1490×2580型號(hào)的電機(jī)振動(dòng)式給料機(jī)的給料箱進(jìn)行動(dòng)力學(xué)分析與研究,并對(duì)其進(jìn)行結(jié)構(gòu)改造。 本文采用ANSYS有限元分析軟件,在進(jìn)行動(dòng)力學(xué)分析之前,首先建立了ZD-1490×2580型電機(jī)振動(dòng)式給料機(jī)的給料箱、等效電機(jī)等部分及整個(gè)系統(tǒng)的有限元分析模型,再進(jìn)行模型的動(dòng)力學(xué)分析研究。具體的工作如下： 第一,在ANSYS經(jīng)典界面中使用板、殼及線對(duì)振動(dòng)式給料機(jī)系統(tǒng)進(jìn)行建模,再用ANSYS的網(wǎng)格劃分模塊對(duì)模型做網(wǎng)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(duì)給料機(jī)的物理模型進(jìn)行模態(tài)分析,得出前30階有載荷及無載荷時(shí)的固有頻率和振型。經(jīng)過分析比較,可以獲得該給料機(jī)耦合振動(dòng)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(chǔ)上,用ANSYS軟件對(duì)振動(dòng)式給料機(jī)做諧響應(yīng)分析,可求出所選節(jié)點(diǎn)的幅頻動(dòng)態(tài)響應(yīng)曲線。結(jié)合模態(tài)分析和諧響應(yīng)分析,便得出該振動(dòng)式給料機(jī)可能會(huì)在20Hz、30Hz和40Hz三個(gè)頻率點(diǎn)附近出現(xiàn)共振現(xiàn)象。 第三,結(jié)合振動(dòng)式給料機(jī)實(shí)際工作中給料量不足的情況,對(duì)其框架系統(tǒng)進(jìn)行了結(jié)構(gòu)改進(jìn),將上部框架與底板剖分開,中間采用軟聯(lián)接。改進(jìn)后只有底板參與電機(jī)的振動(dòng),參振質(zhì)量由改進(jìn)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(shí)際生產(chǎn)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(xué)位授予單位】：遼寧科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TH237.1

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