本文選題：新型流道式泵　切入點(diǎn)：通過(guò)性能　出處：《合肥工業(yè)大學(xué)》2017年碩士論文

【摘要】：流道式潛水排污泵,因通過(guò)能力良好等優(yōu)良特性被廣泛應(yīng)用于污水處理等行業(yè),特別適用于介質(zhì)顆粒、雜質(zhì)纖維較多的特殊場(chǎng)合。但是,該類潛水排污泵也存在著磨損、纏繞、堵塞、效率低等缺點(diǎn),因此,有必要進(jìn)行新型流道式潛水排污泵的研究。本文應(yīng)用數(shù)值分析與試驗(yàn)相結(jié)合的研究方法,對(duì)新型流道式潛水排污泵的的各項(xiàng)性能展開(kāi)了細(xì)致的研究,具體研究結(jié)果如下:(1)對(duì)新型流道式葉輪的設(shè)計(jì)思想進(jìn)行了簡(jiǎn)要描述,闡釋了新型的水力設(shè)計(jì)形式對(duì)抗纏繞性能的影響。在三維建模的基礎(chǔ)上,將新型流道式葉輪與具有相同功率、比轉(zhuǎn)速、轉(zhuǎn)速的傳統(tǒng)型葉輪進(jìn)行通過(guò)能力對(duì)比,新型葉輪的最大過(guò)球直徑上升40%。對(duì)計(jì)算域幾何體進(jìn)行了多面體網(wǎng)格劃分并,建立了計(jì)算模型。(2)設(shè)計(jì)了外特性試驗(yàn)方案,開(kāi)展了外特性試驗(yàn),最終獲得了泵的外特性試驗(yàn)數(shù)據(jù),該結(jié)果與數(shù)值計(jì)算結(jié)果進(jìn)行對(duì)比,兩者吻合度較高,這也說(shuō)明應(yīng)用CFD技術(shù)進(jìn)行泵內(nèi)部流動(dòng)分析具有可參考性。(3)對(duì)清水狀態(tài)下泵內(nèi)部流場(chǎng)進(jìn)行了詳細(xì)的分析,對(duì)比分析了不同工況下泵內(nèi)部流場(chǎng)的結(jié)構(gòu)特性與演變過(guò)程;對(duì)固液兩相狀態(tài)下泵內(nèi)流動(dòng)規(guī)律進(jìn)行了細(xì)致的研究,分析比較了不同固相濃度、顆粒大小、流量值等對(duì)兩相流動(dòng)規(guī)律的影響;最后,預(yù)測(cè)了葉輪表面易磨蝕區(qū)域的分布。(4)開(kāi)展了新型流道式泵的磨蝕試驗(yàn),對(duì)葉輪磨蝕區(qū)域進(jìn)行了定性分析與定量分析;總結(jié)了葉輪表面磨蝕區(qū)域分布規(guī)律;試驗(yàn)中的易磨蝕區(qū)域分布與兩相流模擬中預(yù)測(cè)的結(jié)果相似。應(yīng)用3D掃描技術(shù),基于點(diǎn)云之間的偏差分析法對(duì)磨蝕結(jié)果進(jìn)行定量分析,最大磨蝕量主要出現(xiàn)在:葉片進(jìn)口邊及其向工作面延伸區(qū)域、葉片出口邊附近區(qū)域、輪轂頂圓端面等。
[Abstract]:The flow channel submersible sewage pump is widely used in sewage treatment industry because of its excellent characteristics, such as good passing capacity, especially for special occasions where medium particles and impurity fibers are abundant. However, this kind of submersible sewage pump also has wear and winding. Therefore, it is necessary to study a new type of flow channel submersible sewage pump. The method of numerical analysis and experiment is used in this paper. In this paper, the performances of a new type of flow channel submersible sewage pump are studied in detail. The concrete results are as follows: 1) the design idea of the new type of runner impeller is briefly described. The influence of new hydraulic design form on winding performance is explained. On the basis of 3D modeling, the passage capacity of the new flow impeller is compared with that of the traditional impeller with the same power, specific speed and rotational speed. The maximum diameter of the new impeller goes up by 40. The polyhedron mesh of the geometry in the calculation field is divided and the model of calculation is established. The external characteristic test scheme is designed, and the external characteristic test is carried out. Finally, the external characteristic test data of the pump are obtained. The results are compared with the results of numerical calculation, which shows that the flow field in the pump under the condition of clear water is analyzed in detail by using CFD technology to analyze the flow inside the pump. The structure characteristics and evolution process of the flow field in the pump under different operating conditions are compared, the flow law in the pump under the solid-liquid two-phase state is studied in detail, and the different solid concentration and particle size are analyzed and compared. Finally, the distribution of erosion zone on the surface of impeller is predicted. (4) the abrasion test of a new type of runner pump is carried out, and the qualitative analysis and quantitative analysis of the erosion area of impeller are carried out. The distribution of erosion area on impeller surface is summarized, and the distribution of erosion zone in the test is similar to that predicted in the simulation of two-phase flow. Using 3D scanning technology, based on the deviation analysis between point clouds, the erosion results are quantitatively analyzed. The maximum abrasion amount mainly occurs in the inlet edge of the blade and its extension to the working face, the area near the blade outlet edge, the round end face of the hub top, etc.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X703.3

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