本文選題：傳統(tǒng)和新型轉(zhuǎn)運(yùn)站 + 顆粒接觸力學(xué)模型��； 參考：《太原科技大學(xué)》2017年碩士論文

【摘要】：帶式輸送機(jī)是固定式或運(yùn)移式起重運(yùn)輸設(shè)備的一大類(lèi)。它在各種現(xiàn)代化工礦企業(yè)的生產(chǎn)過(guò)程中起著不可或缺的作用。帶式輸送機(jī)轉(zhuǎn)運(yùn)站層高較大,物料流受重力作用自由下落,傳統(tǒng)轉(zhuǎn)運(yùn)站由于轉(zhuǎn)運(yùn)過(guò)程沖擊碰撞劇烈,嚴(yán)重影響供料系統(tǒng)的正常運(yùn)行,從而各種問(wèn)題逐漸引起人們的重視。轉(zhuǎn)運(yùn)站物料阻塞、粉塵逸出量超標(biāo)以及輸送帶偏載和加速磨損的情況時(shí)有發(fā)生,本文對(duì)傳統(tǒng)轉(zhuǎn)運(yùn)站和新型轉(zhuǎn)運(yùn)站進(jìn)行了對(duì)比分析,從而沿著減少粉塵的方向進(jìn)行分析,進(jìn)而設(shè)計(jì)出了新型束流頭罩、三通分料器、曲線落料管和無(wú)動(dòng)力抑塵導(dǎo)料槽。建立了顆粒接觸力學(xué)模型,從而得到非連續(xù)介質(zhì)的顆粒單元的運(yùn)動(dòng)模型。利用離散元理論對(duì)料流在頭部護(hù)罩、落料管以及導(dǎo)料槽中的運(yùn)動(dòng)進(jìn)行了料流分析,并證明了其在轉(zhuǎn)運(yùn)站內(nèi)具有良好的防堵抑塵效果,并重點(diǎn)分析了濕度和粒度對(duì)落料管接觸力的影響,為曲線落料管的磨損分析提供了技術(shù)支持。同時(shí)對(duì)粉塵產(chǎn)生機(jī)理進(jìn)行了深入研究,設(shè)計(jì)出了具有自然沉降粉塵顆粒的新型導(dǎo)料槽,利用計(jì)算流體力學(xué)軟件對(duì)導(dǎo)料槽的粉塵運(yùn)動(dòng)進(jìn)行分析,確認(rèn)了其合理性和可行性。本文針對(duì)國(guó)內(nèi)外帶式輸送機(jī)轉(zhuǎn)運(yùn)站存在的缺點(diǎn),設(shè)計(jì)出的新型束流頭罩、新型三通分料器以及曲線落料管和無(wú)動(dòng)力抑塵、除塵導(dǎo)料槽可以有效控制料流的方向和速度,解決了傳統(tǒng)轉(zhuǎn)運(yùn)站存在的物料沖擊大,粉塵大和帶式輸送機(jī)受料跑偏等問(wèn)題。為工程設(shè)計(jì)人員提供了新的設(shè)計(jì)方向,為解決傳統(tǒng)轉(zhuǎn)運(yùn)站的缺點(diǎn)提供了有力的支持。
[Abstract]:Belt conveyor is a kind of fixed or moving lifting equipment. It plays an indispensable role in the production process of various modern industrial and mining enterprises. The transfer station of belt conveyor has a large layer height and the material flow falls freely by the action of gravity. Because of the severe impact and collision of the traditional transfer station, the normal operation of the feed system is seriously affected, so people pay more and more attention to all kinds of problems. Material blockage, excessive dust emission, eccentric load and accelerated wear of conveyer belt occur from time to time. This paper makes a comparative analysis between traditional transfer station and new type transfer station, so as to analyze along the direction of reducing dust. Furthermore, a new beam hood, a three-way separator, a curved discharge tube and an unpowered dust suppression and conducting tank are designed. The particle contact mechanics model is established, and the motion model of particle element in discontinuous medium is obtained. Based on the discrete element theory, the material flow in the head guard, the drop tube and the guide tank is analyzed, and it is proved that the material flow has a good effect of blocking and dust suppression in the transfer station. The influence of humidity and particle size on the contact force of the blanking pipe is analyzed, which provides technical support for the wear analysis of the curved blanking pipe. At the same time, the mechanism of dust generation is deeply studied, and a new type of guide tank with naturally deposited dust particles is designed. The dust movement of the guide tank is analyzed by using computational fluid dynamics software, and the rationality and feasibility of the channel are confirmed. In this paper, aiming at the shortcomings of the domestic and foreign belt conveyor transfer stations, a new type of beam hood, a new type of three-way material separator, a curve drop pipe and no dynamic dust suppression are designed, and the direction and speed of the material flow can be effectively controlled by the dust removal guide tank. The problems such as large impact of materials, heavy dust and deviation of belt conveyor are solved in the traditional transfer station. It provides a new design direction for engineering designers and provides a strong support for solving the shortcomings of traditional transfer stations.
【學(xué)位授予單位】：太原科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TH222

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本文編號(hào)：1860111