本文選題：沖壓泵　切入點(diǎn)：導(dǎo)葉　出處：《浙江工業(yè)大學(xué)》2011年碩士論文

【摘要】：離心泵是一種通用流體機(jī)械,廣泛應(yīng)用在工業(yè)生產(chǎn)和社會(huì)生活的各個(gè)領(lǐng)域。近年來(lái),隨著沖壓離心泵的問(wèn)世及發(fā)展,沖壓泵已逐步取代了鑄造泵。沖壓泵采用沖壓成型制造技術(shù),不僅避免了鑄造工藝的缺點(diǎn),而且水力性能也優(yōu)于傳統(tǒng)鑄造泵。如今,沖壓泵已廣泛應(yīng)用于石油化工、油脂、食品、飲料、釀酒、醫(yī)藥衛(wèi)生、電力、紡織、印染、環(huán)保、水處理、表面處理、電子機(jī)械、樓宇供水等行業(yè)。導(dǎo)葉是沖壓泵級(jí)間重要的固定過(guò)流部件,它兼?zhèn)湮液蛪核业碾p重作用,不僅可以導(dǎo)流,還可以回收能量。本文采用MDP40-8-8沖壓立式多級(jí)離心泵作為研究對(duì)象,采用CFD數(shù)值模擬方法,對(duì)其中的兩級(jí)進(jìn)行數(shù)值模擬,研究了導(dǎo)葉出口與葉輪進(jìn)口的匹配關(guān)系,并選擇了其中的一個(gè)方案進(jìn)行了試驗(yàn)驗(yàn)證。本文的主要研究工作包括： (1)簡(jiǎn)要介紹和分析了導(dǎo)葉結(jié)構(gòu)設(shè)計(jì)方法,查閱大量書(shū)籍及文獻(xiàn),整理并總結(jié)出了導(dǎo)葉出口直徑、導(dǎo)葉進(jìn)出口安放角以及導(dǎo)葉葉片數(shù)的相關(guān)計(jì)算公式,為文中改變導(dǎo)葉設(shè)計(jì)參數(shù)的方案作理論鋪墊。 (2)簡(jiǎn)要介紹了Pro/ENGINEER三維制圖軟件,并應(yīng)用Pro/E軟件繪制了不同設(shè)計(jì)參數(shù)下導(dǎo)葉模型,再將不同導(dǎo)葉與其他過(guò)流部件分別組裝組件,導(dǎo)入Gambit中采用非結(jié)構(gòu)化網(wǎng)格進(jìn)行分塊網(wǎng)格劃分,再將網(wǎng)格文件用Fluent軟件寫(xiě)入后進(jìn)行數(shù)值模擬計(jì)算,最后用CFD數(shù)據(jù)后處理技術(shù)對(duì)計(jì)算結(jié)果進(jìn)行分析比較,得出了導(dǎo)葉與葉輪中流場(chǎng)的分布情況和內(nèi)部流動(dòng)特征。 (3)將各組數(shù)值模擬的數(shù)據(jù)進(jìn)行分析,得出在改變導(dǎo)葉參數(shù)情況下,葉輪中流態(tài)的優(yōu)劣情況,模擬結(jié)果表明,在改變導(dǎo)葉出口直徑、導(dǎo)葉出口安放角、導(dǎo)葉葉片數(shù)以及導(dǎo)葉出口和葉輪進(jìn)口距離等設(shè)計(jì)參數(shù)時(shí),葉輪中的流態(tài)均受到了影響。 (4)選擇數(shù)值模擬研究的其中一組方案進(jìn)行試驗(yàn)研究,對(duì)方案中不同的導(dǎo)葉尺寸制造出樣機(jī),整理并分析試驗(yàn)數(shù)據(jù),試驗(yàn)結(jié)果與數(shù)值模擬結(jié)果具有較高的相似性,證明了數(shù)值模擬的正確性和可靠性。
[Abstract]:Centrifugal pump is a kind of universal fluid machinery, which is widely used in various fields of industrial production and social life.In recent years, with the advent and development of centrifugal pump, stamping pump has gradually replaced the casting pump.The punching pump not only avoids the shortcoming of casting process, but also has better hydraulic performance than traditional casting pump.Nowadays, punching pump has been widely used in petrochemical, oil, food, beverage, wine, medicine and hygiene, electric power, textile, printing and dyeing, environmental protection, water treatment, surface treatment, electronic machinery, building water supply and so on.The guide vane is an important fixed flow unit between the stages of the punching pump. It has the dual functions of the suction chamber and the pressure chamber, which can not only guide the flow, but also recover the energy.In this paper, MDP40-8-8 stamping vertical multistage centrifugal pump is used as the research object, and CFD numerical simulation method is used to simulate the two stages of the pump, and the matching relationship between the guide vane outlet and the impeller inlet is studied.One of the schemes is selected for experimental verification.The main research work of this paper includes:This paper briefly introduces and analyzes the design method of guide vane structure, looks up a large number of books and documents, arranges and summarizes the relevant formulas for calculating the outlet diameter of guide vane, the inlet and outlet angle of guide vane, and the number of guide vane pieces.This paper provides a theoretical basis for changing the design parameters of guide vane.In this paper, the Pro/ENGINEER 3D drawing software is introduced briefly, and the guide vane model with different design parameters is drawn by using Pro/E software. Then the different guide vane and other overcurrent components are assembled separately, and the unstructured grid is used to divide the block mesh into Gambit.Then the grid file is written into Fluent software for numerical simulation. Finally, the results are analyzed and compared by using CFD data post-processing technology, and the distribution and internal flow characteristics of the flow field in the guide vane and impeller are obtained.3) by analyzing the data of each group of numerical simulation, the flow state in the impeller can be obtained by changing the parameters of the guide vane. The simulation results show that when the diameter of the outlet of the guide vane is changed, the angle of placement of the outlet of the guide vane is changed.The flow pattern in the impeller is affected by the design parameters such as the number of the guide vane and the distance between the outlet of the guide vane and the inlet of the impeller.4) A group of schemes of numerical simulation is selected for experimental study. A prototype is made for different guide vane sizes in the scheme, and the test data are sorted out and analyzed. The experimental results are similar to those of numerical simulation.The correctness and reliability of the numerical simulation are proved.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH311

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