本文選題：電磁泵 + 數(shù)值模擬　； 參考：《內(nèi)蒙古科技大學(xué)》2015年碩士論文

【摘要】：隨著磁流體力學(xué)的興起，電磁冶金已經(jīng)成為現(xiàn)代材料加工過程的關(guān)鍵技術(shù)之一。電磁泵是利用洛倫茲力驅(qū)動(dòng)金屬液體的裝置，在處理材料的過程中產(chǎn)生徑向電磁力推送熔融金屬。采用非接觸的方式驅(qū)動(dòng)金屬液體，可以有效地避免外部氣體進(jìn)入造成的金屬氧化，提高材料表面質(zhì)量，改善內(nèi)部組織性能。目前，在冶金領(lǐng)域連鑄過程中，多采用傳導(dǎo)式電磁泵進(jìn)行液體驅(qū)動(dòng)定量澆鑄。相比傳導(dǎo)式電磁泵，感應(yīng)式圓柱電磁泵具有流量大與揚(yáng)程高等特點(diǎn)。然而，感應(yīng)式圓柱電磁泵因其體積龐大，僅用于大型核動(dòng)力設(shè)備傳輸冷卻劑。本文致力于設(shè)計(jì)制作小型圓柱感應(yīng)式電磁泵，為感應(yīng)式電磁泵在工業(yè)中的普及提供參考。 本文計(jì)算建立在電磁驅(qū)動(dòng)理論基礎(chǔ)之上，通過運(yùn)用ANSYS有限元分析軟件對(duì)感應(yīng)式圓柱電磁泵進(jìn)行分析計(jì)算。電磁泵主要由初級(jí)鐵心繞組提供行波磁場(chǎng)，由泵溝內(nèi)金屬熔液作為次級(jí)沿徑向傳輸。文章分別對(duì)電磁泵磁極極數(shù)，初級(jí)鐵心，繞組電流，電源頻率以及其他相關(guān)結(jié)構(gòu)參數(shù)進(jìn)行模擬計(jì)算，探索其各個(gè)部分對(duì)電磁泵工作效率的影響。在分析計(jì)算的基礎(chǔ)上制作相應(yīng)的電磁泵樣機(jī)進(jìn)行相關(guān)實(shí)驗(yàn)，，從而驗(yàn)證模擬計(jì)算的可靠性，為樣機(jī)的改進(jìn)提供參考依據(jù)。 通過對(duì)電磁泵各個(gè)部分結(jié)構(gòu)的計(jì)算分析發(fā)現(xiàn)：磁極極對(duì)數(shù)為偶數(shù)的電磁泵能提供更高的磁感應(yīng)強(qiáng)度。環(huán)繞在泵溝外側(cè)的初級(jí)鐵心排布越緊密，對(duì)繞組產(chǎn)生的磁場(chǎng)強(qiáng)度利用率越高。而且，中心鐵心厚度以初級(jí)鐵心磁軛厚度為宜。參考各部分結(jié)構(gòu)對(duì)電磁泵工作效率的影響，在設(shè)計(jì)電磁泵時(shí)要根據(jù)所需電磁泵的體積尺寸確定其繞組的承載能力，為電磁泵傳輸壓差、流量等相關(guān)參數(shù)提出合理的設(shè)計(jì)方案。 在內(nèi)部裝置結(jié)構(gòu)，外部加載等方面的計(jì)算分析基礎(chǔ)上，本文成功制作出一臺(tái)長310mm，直徑250mm的感應(yīng)式圓柱電磁泵，該泵額定線電壓120v，線電流30A，可提供0.5個(gè)大氣壓與17L/min的流量。通過模擬液態(tài)金屬錫在泵中的傳輸，觀察了電磁泵模擬計(jì)算的一個(gè)正弦周期內(nèi)液態(tài)錫中磁感應(yīng)強(qiáng)度、感應(yīng)電流以及電磁力的變化情況。該電磁泵傳輸揚(yáng)程與其對(duì)應(yīng)模型計(jì)算結(jié)果存在較高的一致性。實(shí)驗(yàn)表明有限元分析技術(shù)能夠?yàn)殡姶疟迷O(shè)計(jì)提供了有效的指導(dǎo)作用。
[Abstract]:With the rise of magnetohydrodynamics, electromagnetic metallurgy has become one of the key technologies in modern material processing. Electromagnetic pump is a device that uses Lorentz force to drive metal liquid, which produces radial electromagnetic force to push molten metal in the process of processing material. Using non-contact way to drive metal liquid can effectively avoid the metal oxidation caused by external gas entering, improve the surface quality of materials and improve the internal microstructure and properties. At present, liquid driven quantitative casting is usually carried out by conducting electromagnetic pump in the process of continuous casting in metallurgical field. Compared with conductive electromagnetic pump, inductive cylindrical electromagnetic pump has the characteristics of large flow and high lift. However, inductive cylindrical electromagnetic pump is only used to transfer coolant for large nuclear power equipment because of its large size. This paper is devoted to the design and manufacture of small cylindrical induction electromagnetic pump, which provides a reference for the popularization of inductive electromagnetic pump in industry. Based on the electromagnetic driving theory, this paper analyzes and calculates the inductive cylindrical electromagnetic pump by using ANSYS finite element analysis software. The magnetic field of the electromagnetic pump is mainly provided by the primary core winding, and the metal melt in the pump ditch is used as the secondary radial transmission. In this paper, the number of magnetic poles, primary core, winding current, power frequency and other related structural parameters of electromagnetic pump are simulated and calculated, and the effects of each part on the efficiency of electromagnetic pump are explored. On the basis of analysis and calculation, the corresponding prototype of electromagnetic pump is made to carry out relevant experiments, which verifies the reliability of the simulation calculation and provides a reference for the improvement of the prototype. Through the calculation and analysis of the structure of each part of the electromagnetic pump, it is found that the electromagnetic pump with even logarithm of the pole can provide higher magnetic induction intensity. The closer the primary core is arranged around the outside of the pump groove, the higher the utilization rate of magnetic field intensity is. Moreover, the thickness of the center core is suitable for the primary core yoke. Referring to the influence of each structure on the working efficiency of the electromagnetic pump, the bearing capacity of the winding should be determined according to the volume size of the required electromagnetic pump in the design of the electromagnetic pump, and a reasonable design scheme should be put forward for the transmission pressure difference, flow rate and other related parameters of the electromagnetic pump. On the basis of calculation and analysis of internal device structure and external loading, a inductive cylindrical electromagnetic pump with a length of 310 mm and diameter of 250mm has been successfully fabricated. The pump has a rated line voltage of 120 v and a line current of 30 A. it can provide 0.5 atmospheric pressure and flow rate of 17L/min. By simulating the transmission of liquid metal tin in the pump, the changes of magnetic induction intensity, induced current and electromagnetic force in liquid tin during a sinusoidal cycle simulated by electromagnetic pump are observed. The transmission head of the electromagnetic pump is in good agreement with the calculation result of the corresponding model. Experiments show that the finite element analysis technique can provide effective guidance for electromagnetic pump design.
【學(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TH35

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