本文選題：跳汰機 + 跳汰周期��； 參考：《安徽理工大學(xué)》2017年碩士論文

【摘要】：我國精煤的獲取途徑主要是通過跳汰選煤技術(shù)來實現(xiàn)的,而跳汰機在跳汰選煤中一直扮演著一種極其重要的角色。但是由于在跳汰選煤的過程中會受到多種因素的影響,往往這些影響因素之間并非獨立而是有一定的聯(lián)系,不好控制,使得對原煤的分選效率也會大大下降。一般來說跳汰過程可分為兩個步驟:第一步是對原料進(jìn)行分層,第二步是精煤的分離。而充分的原料分層又是精煤分離的重要前提,因此跳汰選煤最主要的核心部分是通過跳汰室內(nèi)運動的水流對原料按密度的不同進(jìn)行分層,水流的運動軌跡直接影響原料的分層效果。我們所研究的跳汰曲線實際上就是研究水流的運動軌跡,因此通過適當(dāng)?shù)母淖兲�的周期觀察能否改變原料的分層效果,本系統(tǒng)設(shè)計的目的就是實現(xiàn)多種跳汰周期的試驗裝置。本系統(tǒng)采用LCD12864液晶屏作為顯示和操作界面,配合專用的按鍵進(jìn)行設(shè)置并可發(fā)送控制命令。選用可靠性高的PIC16F887作為控制芯片,輸出PWM脈沖來對步進(jìn)電機的轉(zhuǎn)動軌跡進(jìn)行控制最后帶動隔膜運動從而實現(xiàn)多跳汰周期的跳汰模型設(shè)計。實驗過程中利用高速攝像機以及相應(yīng)的圖像處理軟件ProAnalyst來測得跳汰室內(nèi)水流脈動的波形,得到相應(yīng)的跳汰參數(shù)與理論值相比較看兩者是否吻合,最后經(jīng)過多次實驗的驗證完成了本控制系統(tǒng)的設(shè)計。
[Abstract]:The way of obtaining clean coal in our country is mainly realized by jigging technology, and jig has always played an extremely important role in jigging. However, due to the influence of many factors in the process of coal jigging, the separation efficiency of raw coal will be greatly reduced due to the fact that these factors are not independent but have a certain relationship, which is not easy to control. Generally speaking jigging process can be divided into two steps: the first step is to stratify the raw material and the second step is to separate the clean coal. Sufficient stratification of raw materials is also an important prerequisite for separation of clean coal. Therefore, the most important core part of jig coal preparation is the stratification of raw materials according to different densities through the flow of moving water in jigging chamber. The movement track of the flow directly affects the stratification effect of the raw material. The jig curve we're studying is actually studying the trajectory of the water flow, so by changing the cycle of the jig curve appropriately, we can see if we can change the stratification effect of the raw material. The purpose of the system design is to realize a variety of jigging cycle test equipment. The system uses LCD12864 LCD screen as display and operation interface, with special keys to set and send control commands. The reliable PIC16F887 is used as the control chip, and the PWM pulse is output to control the rotation trajectory of the stepping motor. Finally, the diaphragm motion is driven to realize the jig model design of multi-jigging cycle. In the process of the experiment, the high speed video camera and the corresponding image processing software ProAnalyst are used to measure the wave of water flow pulsation in jig chamber, and the corresponding jig parameters are compared with the theoretical values to see if they agree with each other. Finally, the design of the control system is completed after many experiments.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD455.1

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