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

【摘要】：粉磨設備是應用于工、農業(yè)部門和高新技術產業(yè)中不可缺少的加工設備,利用粉磨設備可以將大至幾米的物料經過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。但隨著工農業(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世界總電耗的10%-12%,而在這些行業(yè)的初期設備投資中,用于購買粉磨成套設備的費用已達50%-70%。因此對粉磨行業(yè)的設備工藝更新,降低粉磨的成本已變得非常重要。以往國內外粉磨技術的發(fā)展,長期停留在對原有技術上改造和加大規(guī)模上的研究,難以打破目前粉磨行業(yè)的現(xiàn)狀。 本文通過改變常規(guī)振動磨機的激振源,設計出混沌振動磨機。通過對振動磨機的粉磨原理進行研究發(fā)現(xiàn)振動強度是影響粉磨效率的主要因素,而常規(guī)振動磨機的振動幅度小、頻率單一、筒內存在乏能區(qū),很難實現(xiàn)高效生產。而混沌振動磨機在混沌激振器的激振下,產生混沌振動,振動體在原有的主頻振動基礎上增加倍頻振動。這種寬頻振動迫使磨筒內物料與研磨介質運動劇烈、隨機,使得粉磨沖擊力增大,筒內物體摩擦剪切的機會增加,同時有效避免了乏能區(qū)的產生 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)振動磨機和混沌振動磨機的數(shù)學模型,并使用Matlab對其運動軌跡進行仿真。通過對仿真結果進行對比,證明混沌振動磨機的運動時混沌振動,振動強度大于常規(guī)振動磨機。然后使用三維建模軟件對混沌振動磨的振動體進行建模,根據(jù)三維模型參數(shù)并結合KAM定理計算設計端面式混沌激振器,并對其他振動元件設計選型。同時使用Adams對修正后的振動體進行動力學仿真。通過仿真結果看出,混沌振動磨機的振動體的運動軌跡是在一定范圍內不確定、不規(guī)則的近圓運動。振動破碎速度大、頻率高,使粉磨加工快速有效。 研究分析表明,混沌振動磨機的粉磨效率和精度高于常規(guī)振動磨機,而且沒有乏能區(qū)的存在,減少能耗同時使粉磨加工粒度均勻。此設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.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TB44;TH113.1

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