發(fā)布時(shí)間：2018-06-25 06:48

  本文選題：振動(dòng)磨機(jī) + 混沌激振器��； 參考：《昆明理工大學(xué)》2013年碩士論文

【摘要】：粉磨設(shè)備是應(yīng)用于工、農(nóng)業(yè)部門和高新技術(shù)產(chǎn)業(yè)中不可缺少的加工設(shè)備,利用粉磨設(shè)備可以將大至幾米的物料經(jīng)過(guò)一段或多段粉碎加工,將物料加工到幾毫米至幾微米,甚至到亞微米級(jí)。但隨著工農(nóng)業(yè)的發(fā)展,粉磨物料的電耗不斷增加,用于粉碎粉磨的電耗已達(dá)世界總電耗的10%-12%,而在這些行業(yè)的初期設(shè)備投資中,用于購(gòu)買粉磨成套設(shè)備的費(fèi)用已達(dá)50%-70%。因此對(duì)粉磨行業(yè)的設(shè)備工藝更新,降低粉磨的成本已變得非常重要。以往國(guó)內(nèi)外粉磨技術(shù)的發(fā)展,長(zhǎng)期停留在對(duì)原有技術(shù)上改造和加大規(guī)模上的研究,難以打破目前粉磨行業(yè)的現(xiàn)狀。 本文通過(guò)改變常規(guī)振動(dòng)磨機(jī)的激振源,設(shè)計(jì)出混沌振動(dòng)磨機(jī)。通過(guò)對(duì)振動(dòng)磨機(jī)的粉磨原理進(jìn)行研究發(fā)現(xiàn)振動(dòng)強(qiáng)度是影響粉磨效率的主要因素,而常規(guī)振動(dòng)磨機(jī)的振動(dòng)幅度小、頻率單一、筒內(nèi)存在乏能區(qū),很難實(shí)現(xiàn)高效生產(chǎn)。而混沌振動(dòng)磨機(jī)在混沌激振器的激振下,產(chǎn)生混沌振動(dòng),振動(dòng)體在原有的主頻振動(dòng)基礎(chǔ)上增加倍頻振動(dòng)。這種寬頻振動(dòng)迫使磨筒內(nèi)物料與研磨介質(zhì)運(yùn)動(dòng)劇烈、隨機(jī),使得粉磨沖擊力增大,筒內(nèi)物體摩擦剪切的機(jī)會(huì)增加,同時(shí)有效避免了乏能區(qū)的產(chǎn)生 本文首先分析物料粉碎原理,找出影響粉磨效率的主要因素,分析不利因素產(chǎn)生原因并提出優(yōu)化方案。其次,文章中利用Lagrange方程分別建立常規(guī)振動(dòng)磨機(jī)和混沌振動(dòng)磨機(jī)的數(shù)學(xué)模型,并使用Matlab對(duì)其運(yùn)動(dòng)軌跡進(jìn)行仿真。通過(guò)對(duì)仿真結(jié)果進(jìn)行對(duì)比,證明混沌振動(dòng)磨機(jī)的運(yùn)動(dòng)時(shí)混沌振動(dòng),振動(dòng)強(qiáng)度大于常規(guī)振動(dòng)磨機(jī)。然后使用三維建模軟件對(duì)混沌振動(dòng)磨的振動(dòng)體進(jìn)行建模,根據(jù)三維模型參數(shù)并結(jié)合KAM定理計(jì)算設(shè)計(jì)端面式混沌激振器,并對(duì)其他振動(dòng)元件設(shè)計(jì)選型。同時(shí)使用Adams對(duì)修正后的振動(dòng)體進(jìn)行動(dòng)力學(xué)仿真。通過(guò)仿真結(jié)果看出,混沌振動(dòng)磨機(jī)的振動(dòng)體的運(yùn)動(dòng)軌跡是在一定范圍內(nèi)不確定、不規(guī)則的近圓運(yùn)動(dòng)。振動(dòng)破碎速度大、頻率高,使粉磨加工快速有效。 研究分析表明,混沌振動(dòng)磨機(jī)的粉磨效率和精度高于常規(guī)振動(dòng)磨機(jī),而且沒(méi)有乏能區(qū)的存在,減少能耗同時(shí)使粉磨加工粒度均勻。此設(shè)備為解決目前粉磨行業(yè)難題提供有效解決方案。
[Abstract]:Grinding equipment is an indispensable processing equipment used in industrial, agricultural and high-tech industries. With grinding equipment, materials as large as several meters can be processed by one or more segments, and materials can be processed to several millimeters to several microns. Even sub-micron. However, with the development of industry and agriculture, the power consumption of grinding materials is increasing, and the power consumption of grinding materials has reached 10- 12 of the total power consumption in the world. In the initial equipment investment of these industries, the cost of purchasing complete sets of grinding equipment has reached 50 to 70 percent. Therefore, it is very important to update the equipment process and reduce the cost of grinding. With the development of grinding technology both at home and abroad, it is difficult to break the present situation of grinding industry because of its long term research on the transformation of the original technology and the enlargement of the scale. In this paper, the chaotic vibration mill is designed by changing the exciting source of the conventional vibration mill. By studying the grinding principle of vibration mill, it is found that the vibration intensity is the main factor affecting the grinding efficiency, while the vibration amplitude of the conventional vibration mill is small, the frequency is single, and there is a lack of energy region in the cylinder, so it is difficult to realize high efficiency production. The chaotic vibration is produced in the chaotic vibration grinder under the excitation of the chaotic vibration exciter, and the vibration body increases the frequency doubling vibration on the basis of the original main frequency vibration. This kind of wide-band vibration forces the material and the grinding medium to move violently and randomly, which increases the impact force of grinding and increases the chances of friction and shearing of objects in the cylinder. At the same time, the paper analyzes the principle of material grinding, finds out the main factors that affect grinding efficiency, analyzes the causes of unfavorable factors and puts forward the optimization scheme. Secondly, the mathematical models of conventional vibration mill and chaotic vibration mill are established by Lagrange equation, and the motion trajectory is simulated by Matlab. By comparing the simulation results, it is proved that the chaotic vibration intensity of the chaotic vibration mill is higher than that of the conventional vibration mill. Then the vibration object of chaotic vibration mill is modeled with 3D modeling software. According to the 3D model parameters and combining with Kam theorem, the end face chaotic vibration exciter is designed, and other vibration elements are designed and selected. At the same time, the modified vibrator is simulated by Adams. The simulation results show that the motion track of the vibrating body of the chaotic vibration mill is uncertain and irregular in a certain range. The vibration crushing speed is high, the frequency is high, makes the grinding processing fast and effective. The results show that the grinding efficiency and precision of the chaotic vibration mill are higher than that of the conventional vibration mill, and there is no lack of energy region, which reduces the energy consumption and makes the grinding granularity even. This equipment provides an effective solution to the current grinding industry problems.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TB44;TH113.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 董遠(yuǎn)達(dá);馬學(xué)鳴;;高能球磨法制備納米材料[J];材料科學(xué)與工程;1993年01期

2 李和平,夏翔,吳霞;圓柱螺旋壓縮彈簧的設(shè)計(jì)計(jì)算[J];井岡山師范學(xué)院學(xué)報(bào);2005年03期

3 張合軍,王軍瑋;幾種常用偏心塊偏心矩及其激振力的計(jì)算分析[J];礦山機(jī)械;1999年06期

4 王vd,王友宏,羅帆;硬質(zhì)物料的振動(dòng)沖擊細(xì)碎[J];礦山機(jī)械;2003年04期

5 郭天德;振動(dòng)磨的發(fā)展及降低能耗途徑[J];中國(guó)非金屬礦工業(yè)導(dǎo)刊;1999年05期

6 孫成林;近年我國(guó)超細(xì)粉碎與超細(xì)分級(jí)發(fā)展及問(wèn)題[J];中國(guó)非金屬礦工業(yè)導(dǎo)刊;2003年01期

7 張更超,應(yīng)富強(qiáng);超細(xì)粉碎技術(shù)現(xiàn)狀及發(fā)展趨勢(shì)[J];煤礦機(jī)械;2003年05期

8 楊萬(wàn)東;馬建敏;劉穎;張文;;同一軸線上雙激振器驅(qū)動(dòng)的振動(dòng)體同步運(yùn)動(dòng)狀態(tài)分析[J];振動(dòng)與沖擊;2008年06期

9 何春娟,邢凱;振動(dòng)磨機(jī)彈性元件的設(shè)計(jì)[J];西安工業(yè)學(xué)院學(xué)報(bào);1998年03期

，

本文編號(hào)：2065038