本文選題：攪拌 + 參數(shù)化　； 參考：《鄭州大學(xué)》2015年碩士論文

【摘要】：本文以斜軸式高效混料機(jī)為研究對(duì)象,在綜合分析傳統(tǒng)混料機(jī)的基礎(chǔ)上利用三維設(shè)計(jì)軟件SOLIDWORKS設(shè)計(jì)混料機(jī)的筒體和攪拌槳,分析其在混料過(guò)程中的混合原理,通過(guò)簡(jiǎn)化其三維模型,分析了混料機(jī)筒體傾斜角度、攪拌軸安裝位置以及攪拌葉片長(zhǎng)度對(duì)混料效果的影響;基于三維流場(chǎng)理論,綜合運(yùn)用SOLIDWORKS、DEM-EDEM、FLUENT等軟件,對(duì)斜軸式高效混料機(jī)筒體內(nèi)部流場(chǎng)進(jìn)行流體動(dòng)力學(xué)分析。通過(guò)對(duì)已有立軸式混料機(jī)攪拌葉片和筒體的形式特征來(lái)對(duì)比分析,綜合學(xué)習(xí)和利用國(guó)內(nèi)外關(guān)于混料機(jī)研發(fā)技術(shù)的基礎(chǔ)上,設(shè)計(jì)出一種新型的斜軸式混料機(jī)。該混料機(jī)是采用逆流原理混合的高效設(shè)備,混合盤(pán)以-4rad/s的速度順時(shí)針旋轉(zhuǎn),轉(zhuǎn)軸逆時(shí)針轉(zhuǎn)速30rad/s,這樣通過(guò)混合盤(pán)與攪拌軸的相對(duì)運(yùn)動(dòng)使物料不僅作水平移動(dòng)也垂直運(yùn)動(dòng),可以在短時(shí)間內(nèi)達(dá)到混合均勻的目的。結(jié)合計(jì)算流體力學(xué)理論,采用EDEM離散元分析方法,模擬仿真筒體內(nèi)物料的混合情況,設(shè)定10s、20s、30s、40s、50s五個(gè)時(shí)間段,來(lái)分別計(jì)算出混合度進(jìn)行對(duì)比分析。選取合適參數(shù)化的模型進(jìn)行有限元分析,采用多重參考系(MRF)及有限體積法,利用ANSYS ICEM進(jìn)行結(jié)構(gòu)化網(wǎng)格劃分,建立攪拌筒流體動(dòng)力學(xué)模型。運(yùn)用流體動(dòng)力學(xué)固、液混合模型,對(duì)攪拌筒內(nèi)流體在攪拌葉片作用下的運(yùn)動(dòng)狀態(tài)進(jìn)行分析,研究筒體傾斜角度、攪拌葉片長(zhǎng)度及速度變化對(duì)混合質(zhì)量的影響,分別得出速度和壓力云圖,建立起攪拌筒流場(chǎng)性能與攪拌性能的對(duì)應(yīng)關(guān)系。研究結(jié)果將為以后的新型混料機(jī)筒體和攪拌軸的開(kāi)發(fā)以及性能預(yù)估提供理論指導(dǎo)和依據(jù)。
[Abstract]:In this paper, the inclined shaft type high efficiency mixer is taken as the research object. On the basis of comprehensive analysis of the traditional mixer, the mixing principle of the cylinder and agitator of the mixer is designed by using three-dimensional design software SOLIDWORKS, and the mixing principle in the process of mixing is analyzed. By simplifying the three-dimensional model, the influence of the inclined angle of the mixer cylinder, the position of the mixing shaft and the length of the mixing blade on the mixing effect is analyzed, and based on the three-dimensional flow field theory, the software SOLIDWORKS DEM-EDEMMEUENT is used synthetically, such as SOLIDWORKSU DEM-EDEMMEUENT, etc. The hydrodynamic analysis of the flow field in the cylinder of the inclined shaft type high efficiency mixer is carried out. A new type of inclined shaft mixer was designed by comparing and analyzing the formal characteristics of the blade and cylinder of the vertical shaft mixer and synthetically studying and utilizing the research and development technology of the mixer at home and abroad. The mixer is a highly efficient equipment with countercurrent principle. The mixing disk rotates clockwise at a speed of -4 radr / s, and the rotating shaft rotates counterclockwise at 30 radr / s, which makes the material move not only horizontally but also vertically through the relative motion of the mixing disk and the mixing shaft. The mixture can be evenly mixed in a short period of time. Combined with the theory of computational fluid dynamics, the mixing of materials in the cylinder is simulated by using EDEM discrete element analysis method, and the mixing degree is calculated and analyzed respectively in five time periods of 10 s ~ 20 s ~ 30 s ~ 30 s ~ 40 s ~ 50 s. The appropriate parameterized model is selected for finite element analysis. The multi-reference system MRF) and the finite volume method are used to divide the structured meshes with ANSYS ICEM, and the hydrodynamic model of the mixing cylinder is established. By using the solid and liquid mixing model of fluid dynamics, the motion state of the fluid in the mixing cylinder under the action of the stirring blade is analyzed, and the influence of the inclined angle of the cylinder, the length and the velocity of the stirring blade on the mixing quality is studied. The velocity and pressure cloud diagrams are obtained, and the corresponding relationship between the flow field performance and the mixing performance is established. The research results will provide theoretical guidance and basis for the development and performance prediction of the new mixer barrel and mixing shaft in the future.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TQ051.71

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本文編號(hào)：1828890