本文選題：跳汰選煤 + 跳汰周期��； 參考：《安徽理工大學(xué)》2016年碩士論文

【摘要】：跳汰選煤在選煤中占有重要地位,跳汰機(jī)在選煤中一直是一種極其有效的分選設(shè)備。自從它投入使用以來,一直不斷的改進(jìn)與完善,但是由于受各種條件的限制,導(dǎo)致跳汰機(jī)選煤的分選效率較低。在什么特性的脈動(dòng)水流下能使特定密度、粒度組成的物料獲得好的分選效果,以及這種特性的脈動(dòng)水流在什么樣的跳汰周期下才能獲得,依靠現(xiàn)有理論尚無法回答。跳汰過程主要包括兩個(gè)部分：一是原煤的分層,二是產(chǎn)品的分離。而原煤的分層是跳汰產(chǎn)品分離的前提條件,它直接影響著跳汰選煤的分選效果。原煤的分層是在垂直交變水流的作用下來完成的,而分層的產(chǎn)生又是以床層的松散為前提條件。水流的脈動(dòng)可以直接引起床層的松散,此外水流的脈動(dòng)又和跳汰周期特性密切相關(guān)。所以,對(duì)跳汰周期特性進(jìn)行研究,并最終做出可實(shí)現(xiàn)任意跳汰周期特性的試驗(yàn)裝置,對(duì)跳汰選礦將來的發(fā)展和應(yīng)用具有重要的意義。本文運(yùn)用LabVIEW作為上位機(jī)發(fā)送控制命令,具有圖形化的操作界面,下位機(jī)選用DSP28335芯片與上位機(jī)進(jìn)行串口通訊,同時(shí)作為步進(jìn)電機(jī)的控制器,通過步進(jìn)電機(jī)控制隔膜從而實(shí)現(xiàn)不同的跳汰曲線,進(jìn)一步借助高速攝像機(jī)以及相應(yīng)的處理軟件來進(jìn)行對(duì)跳汰曲線分析處理以檢驗(yàn)是否達(dá)到所需的曲線。本系統(tǒng)完成了硬件、軟件的實(shí)驗(yàn)調(diào)試,并通過實(shí)驗(yàn)得到了不同的跳汰周期曲線,取得了一定的效果。
[Abstract]:Jigging coal plays an important role in coal preparation. Jig is always a very effective separation equipment in coal preparation. Since it has been put into use, it has been continuously improved and perfected, but due to the constraints of various conditions, the separation efficiency of jig coal preparation is low. Under what characteristic pulsating flow can make the material with specific density and particle size get good sorting effect and what kind of jig period can be obtained for this characteristic pulsating flow can not be answered depending on the existing theories. Jigging process mainly includes two parts: one is the stratification of raw coal, the other is the separation of products. The stratification of raw coal is the precondition of jigging product separation, which directly affects the separation effect of jig coal. The stratification of raw coal is completed under the action of vertical alternating flow, and the formation of stratification is based on the loose bed. The pulsation of water flow can directly cause the bed to loose, and the pulsation of water flow is closely related to the periodic characteristics of jigging. Therefore, it is of great significance for the development and application of jig dressing in the future to study the periodic characteristics of jig and finally to make a test device that can realize the periodic characteristics of jig. In this paper, LabVIEW is used as the upper computer to send control commands, with a graphical operation interface. The lower computer uses DSP 28335 chip to communicate with the host computer and acts as the controller of the stepper motor at the same time. Different jig curves are realized by controlling the diaphragm of step motor, and then the jig curve is analyzed and processed with the help of high speed camera and corresponding processing software to check whether the jig curve is up to the required curve. The system has completed the experiment debugging of hardware and software, and obtained different jig cycle curves by experiment, and achieved certain effect.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TD94;TD455.1

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本文編號(hào)：1999445