【摘要】：受溫室效應(yīng)影響,燃料電池作為清潔能源之一,由于其具有高效、零污染、無噪音以及不受場地限制獲得廣泛關(guān)注,雙極板是燃料電池最重要的組成部分,雙極板的制備工藝和專用熱壓機裝備研發(fā)一直是制約燃料電池發(fā)展的難點問題,因此,雙極板專用熱壓機的設(shè)計研究成為了一項重要內(nèi)容。本文在現(xiàn)有雙極板制備工藝等對壓機要求的基礎(chǔ)上,提出雙極板熱壓機的功能要求、設(shè)計要求、結(jié)構(gòu)特點和模具設(shè)計要求,為雙極板壓機的設(shè)計生產(chǎn)提供參考依據(jù),具體工作內(nèi)容如下:(1)比較三種類型的液壓機機身結(jié)構(gòu)優(yōu)缺點,框架式結(jié)構(gòu)由于剛強度較好且成本較低等優(yōu)點,選用為雙極板專用熱壓機機身結(jié)構(gòu),并設(shè)計相關(guān)主機結(jié)構(gòu)。(2)比較點型、直線形以及蛇形等流場性能優(yōu)缺點,設(shè)計直線形流場模具結(jié)構(gòu);比較齒輪、凸輪以及棘輪等旋轉(zhuǎn)機構(gòu),選擇棘輪機構(gòu)設(shè)計雙極板模架可旋轉(zhuǎn)機構(gòu),消除模具以及工作平臺不平整性對雙極板制備的影響。(3)根據(jù)熱壓板傳熱學(xué)的基本原理,設(shè)計電熱壓板與油加熱板的加熱孔道直徑與孔道數(shù),建立有限元模型對兩結(jié)構(gòu)進行熱分析,得到兩種熱壓板的溫度場云圖結(jié)果,實驗驗證兩種熱壓板的結(jié)構(gòu)設(shè)計合理性。(4)綜合考慮雙極板模具以及雙極板壓機機身的實際載荷情況,對雙極板模具以及雙極板壓機機身建立有限元模型,并對模具和機身進行熱力耦合仿真分析,揭示溫度載荷對壓機熱加工變形機理。(5)實驗驗證雙極板熱壓機機身和模具的變形與溫度之間的關(guān)系,揭示熱壓過程中熱壓機變形影響機理;在機身與模具變形情況下,制件雙極板實驗,驗證機身與模具的變形對雙極板正常壓制的影響。
[Abstract]:Under the influence of Greenhouse Effect, fuel cell is one of the clean energy sources. Because of its high efficiency, zero pollution, no noise and no limitation of site, bipolar plate is the most important component of fuel cell. The preparation process of bipolar plate and the research and development of special hot press equipment have been the difficult problems restricting the development of fuel cell. Therefore, the design and research of special hot press for bipolar plate has become an important content. On the basis of the existing bipolar plate preparation technology and other requirements for the press, this paper puts forward the functional requirements, design requirements, structural characteristics and die design requirements of the bipolar plate hot press, which provides a reference for the design and production of the bipolar plate press. The specific work is as follows: (1) comparing the advantages and disadvantages of three types of hydraulic press fuselage structure, the frame structure is chosen as the special hot-press body structure for bipolar plate due to the advantages of good rigidity and low cost. And design the related host structure. (2) compare the merits and demerits of point, linear and snake flow field, and design the die structure of linear flow field; Comparing the rotating mechanism of gear, cam and ratchet, selecting ratchet mechanism to design the rotating mechanism of bipolar plate mould frame, eliminating the influence of the unevenness of die and working platform on the preparation of bipolar plate. (3) according to the basic principle of heat transfer of hot pressing plate, The diameter and number of heating holes of electric hot pressing plate and oil heating plate are designed. The thermal analysis of the two structures is carried out by using finite element model, and the results of the temperature field cloud diagram of the two hot pressed plates are obtained. The experimental results show that the structural design of the two hot pressing plates is reasonable. (4) considering the actual load of the bipolar plate die and the body of the bipolar plate press, the finite element model of the bipolar plate die and the fuselage of the bipolar press is established. The thermo-mechanical coupling simulation analysis of die and fuselage is carried out to reveal the deformation mechanism of hot working press under temperature load. (5) the relationship between deformation and temperature of the body and die of bipolar plate hot press is verified by experiments. The influence mechanism of hot press deformation during hot pressing is revealed. In the case of the deformation of the fuselage and die, the effect of the deformation of the fuselage and die on the normal pressing of the bipolar plate is verified by the experiment of the bipolar plate.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH122

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