本文選題：真空注型機(jī) + 動(dòng)網(wǎng)格�。� 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：真空澆注(VC)技術(shù)是快速成型技術(shù)最廣泛的應(yīng)用之一,基于此技術(shù)的真空注型機(jī)是一種將不同組分的溶液混合并澆注固化成產(chǎn)品的設(shè)備,這種設(shè)備可以實(shí)現(xiàn)多品種、小批量、非金屬零件的高效率、敏捷化生產(chǎn),能夠滿足企業(yè)生產(chǎn)需要,使其在激烈的市場(chǎng)競(jìng)爭(zhēng)中占據(jù)有利地位,受到市場(chǎng)的青睞。其中,溶液的混合效果直接關(guān)乎產(chǎn)品質(zhì)量,對(duì)注型設(shè)備內(nèi)部混合器的研究也越來(lái)越受到人們的重視。本文基于計(jì)算流體力學(xué)技術(shù),針對(duì)中小型真空注型機(jī)內(nèi)部的混合裝置進(jìn)行了相關(guān)研究。借鑒國(guó)內(nèi)外研究經(jīng)驗(yàn),設(shè)計(jì)了一款能夠生產(chǎn)非金屬制品的中小型真空注型機(jī),并據(jù)此提出了與該設(shè)備匹配且實(shí)現(xiàn)溶液按比例混合的新型動(dòng)態(tài)混合器。建立注型機(jī)澆注艙與動(dòng)態(tài)混合器的有限元模型,應(yīng)用FLUENT軟件中的S2S輻射與對(duì)流模型對(duì)澆注艙內(nèi)的熱場(chǎng)進(jìn)行了分析,選用動(dòng)網(wǎng)格模型、Mixture多相流模型、RNGk-ε湍流模型及PISO算法對(duì)在此溫度條件下工作的動(dòng)態(tài)混合器內(nèi)部流場(chǎng)進(jìn)行了宏觀分析,并在此基礎(chǔ)上,實(shí)現(xiàn)了對(duì)混合器結(jié)構(gòu)一定程度的改進(jìn);另外,分別從改變預(yù)混合器出口位置、葉片數(shù)量和葉輪轉(zhuǎn)速等方面對(duì)混合器的混合性能進(jìn)行了研究;最后,通過(guò)采用對(duì)混合澆注后制品的觀察和力學(xué)性能測(cè)量?jī)煞N不同的檢驗(yàn)方式,評(píng)測(cè)了混合器的混合性能。研究結(jié)果表明預(yù)混合管道出口位置不同時(shí),混合器混合效果不同;當(dāng)葉片數(shù)量為16時(shí),混合效果最理想;模擬還表明,增加葉輪旋轉(zhuǎn)速度對(duì)混合效果作用明顯,但是達(dá)到一定轉(zhuǎn)速后,混合效果趨于穩(wěn)定;在此基礎(chǔ)上,通過(guò)液體質(zhì)點(diǎn)運(yùn)動(dòng)矢量圖、速度流線圖和湍動(dòng)強(qiáng)度分布云圖,分析了加速溶液混合均勻的主要因素是葉輪二次剪切和混合器中運(yùn)動(dòng)部件對(duì)流場(chǎng)的湍動(dòng)作用,選用環(huán)氧樹(shù)脂(E51)與固化劑進(jìn)行混合并澆注成型,實(shí)驗(yàn)結(jié)果表明該混合器混合性能可靠。以上研究結(jié)果,對(duì)動(dòng)態(tài)混合器的設(shè)計(jì)和分析具有一定的參考意義。
[Abstract]:The vacuum casting technology is one of the most extensive applications of rapid prototyping technology. The vacuum casting machine based on this technology is a kind of equipment for mixing different components of solutions and solidifying them into products. The high efficiency and agile production of non-metal parts can meet the production needs of enterprises and make them occupy a favorable position in the fierce market competition and be favored by the market. Among them, the mixing effect of solution is directly related to product quality, and the research on internal mixer of injection equipment has been paid more and more attention. Based on computational fluid dynamics (CFD) technology, the mixing device of medium and small vacuum injection machine is studied in this paper. Based on the domestic and foreign research experience, a small and medium-sized vacuum injection machine was designed to produce non-metal products. Based on this, a new type of dynamic mixer was put forward, which matched the equipment and realized the proportional mixing of solution. The finite element model of the pouring tank and dynamic mixer of the pouring machine is established. The heat field in the pouring tank is analyzed by using the S2S radiation and convection model in FLUENT software. RNGk- 蔚 turbulence model and PISO algorithm are used to macroscopically analyze the internal flow field of the dynamic mixer working at this temperature. On the basis of this, the structure of the mixer is improved to a certain extent. The mixing performance of the mixer was studied by changing the outlet position of the premixer, the number of blades and the speed of the impeller, etc. Finally, two different inspection methods, the observation of the products after mixing and the measurement of the mechanical properties, were adopted. The mixing performance of the mixer is evaluated. The results show that the mixing effect of the mixer is different when the outlet position of the pre-mixed pipe is different, the mixing effect is the best when the number of blades is 16:00, and the simulation also shows that the mixing effect is obvious when the rotating speed of the impeller is increased. However, the mixing effect tends to be stable after a certain rotational speed is achieved. On this basis, through the vector diagram of liquid particle motion, the velocity streamline diagram and the turbulent intensity distribution cloud diagram, The main factors of accelerating the mixing uniformity of the solution are the secondary shear of impeller and the turbulent movement of the moving parts in the mixer. The epoxy resin E51) is mixed with the curing agent and molded. The experimental results show that the mixing performance of the mixer is reliable. The above results have some reference significance for the design and analysis of dynamic mixer.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH16

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孫計(jì)贊;張引;劉勝;張麗;倪榮軍;許宏民;張苗;陶琳;;日用陶瓷吸水率能力驗(yàn)證樣品制備關(guān)鍵技術(shù)研究[J];山東陶瓷;2016年05期

2 陳卓;曾良才;湛從昌;鄭飛龍;趙康;;基于Fluent的鉆井糾斜液壓系統(tǒng)導(dǎo)向套葉片形狀優(yōu)化選擇[J];武漢科技大學(xué)學(xué)報(bào);2015年04期

3 朱峰;高學(xué)農(nóng);;溫度對(duì)環(huán)氧樹(shù)脂熱物性影響的研究[J];廣東化工;2015年09期

4 張學(xué)閣;賈甲;耿思增;梁曉軍;;粉水混合器轉(zhuǎn)子動(dòng)力特性理論研究[J];糧食加工;2015年02期

5 裴凱凱;李瑞江;吳勇強(qiáng);倪燕慧;朱子彬;;氣-氣快速噴射混合器的模擬研究[J];化學(xué)反應(yīng)工程與工藝;2015年01期

6 雷宗明;榮準(zhǔn);孔松濤;;ZM-2鉆井液密度調(diào)節(jié)混合裝置的研制與應(yīng)用[J];天然氣工業(yè);2014年11期

7 張海光;張壯雅;胡慶夕;;真空注型智能質(zhì)量控制方法及系統(tǒng)實(shí)現(xiàn)[J];計(jì)算機(jī)集成制造系統(tǒng);2014年10期

8 鄭勐;雷鵬;董永亨;;一種高粘度兩相流靜態(tài)混合器混合均勻度的仿真分析[J];機(jī)械科學(xué)與技術(shù);2014年10期

9 王沖;楊濮亦;徐建新;王仕博;王華;;頂吹攪拌混合過(guò)程氣液兩相流流型識(shí)別實(shí)驗(yàn)研究[J];昆明理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年04期

10 關(guān)天灝;許雪巖;唐亮;;聚合物驅(qū)攪拌器的結(jié)構(gòu)設(shè)計(jì)與分析[J];當(dāng)代化工;2014年07期

相關(guān)會(huì)議論文 前1條

1 方宜;鄔斌;駱培成;;多孔錯(cuò)流射流噴射混合器內(nèi)液體湍流混合特性研究[A];2015年中國(guó)化工學(xué)會(huì)年會(huì)論文集[C];2015年

相關(guān)碩士學(xué)位論文 前1條

1 張宏斌;高粘度聚合物母液靜態(tài)混合器混合特性研究[D];東北石油大學(xué);2013年

，

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