本文選題：節(jié)段式離心泵 + 傳統(tǒng)設(shè)計(jì)方法��； 參考：《華北電力大學(xué)》2011年碩士論文

【摘要】：本文根據(jù)火電廠節(jié)段式多級(jí)離心泵使用中出現(xiàn)的情況,提出對(duì)其進(jìn)行全面性能優(yōu)化設(shè)計(jì)的必要性,接著對(duì)離心泵的傳統(tǒng)設(shè)計(jì)方法,即相似換算法和速度系數(shù)法進(jìn)行介紹,并指出各自的局限性:即相似換算法設(shè)計(jì)結(jié)果在很大程度上要依賴優(yōu)秀水力模型的技術(shù)水平,若沒有合適的優(yōu)秀水力模型,將無法開展新產(chǎn)品的設(shè)計(jì),而速度系數(shù)法中系數(shù)選取范圍的寬長(zhǎng)性,使初設(shè)計(jì)者無從下手感到很困惑,并且同一設(shè)計(jì)參數(shù),不同的設(shè)計(jì)者會(huì)設(shè)計(jì)出不同的設(shè)計(jì)結(jié)果,本文根據(jù)工程實(shí)際中的設(shè)計(jì)經(jīng)驗(yàn),提出一種基于Excel的有效設(shè)計(jì)方法。 結(jié)合離心泵性能影響因素,對(duì)設(shè)計(jì)過程中的高效率、高抗汽蝕性能、無駝峰曲線及運(yùn)行范圍內(nèi)功率無過載等目標(biāo)建立分目標(biāo)模型,并用數(shù)學(xué)規(guī)劃理論對(duì)多目標(biāo)模型進(jìn)行統(tǒng)一目標(biāo)函數(shù),根據(jù)實(shí)際設(shè)計(jì)經(jīng)驗(yàn)和優(yōu)秀水力模型庫(kù)系數(shù)的統(tǒng)計(jì),對(duì)統(tǒng)一目標(biāo)函數(shù)提出相應(yīng)的約束條件。 隨著CFD技術(shù)發(fā)展日趨完善和分析、計(jì)算結(jié)果精確度的提高,成為離心泵設(shè)計(jì)、研究領(lǐng)域不可或缺的一種檢驗(yàn)設(shè)計(jì)的方法。本文介紹了節(jié)段式離心泵的葉輪基于Solidwoks的實(shí)體造型技術(shù),同時(shí)采用Flow Simulation流體分析軟件對(duì)葉輪內(nèi)部流場(chǎng)進(jìn)行了分析。
[Abstract]:According to the situation in the use of segmental multistage centrifugal pump in thermal power plant, this paper puts forward the necessity of overall performance optimization design, and then introduces the traditional design methods of centrifugal pump, that is, similarity conversion method and velocity coefficient method. It is pointed out that the design results of the similarity conversion method depend on the technical level of the excellent hydraulic model to a great extent, and if there is no suitable excellent hydraulic model, the design of the new product will not be carried out. But in the velocity coefficient method, the width and length of the selection range of the coefficient makes the initial designer feel perplexed, and with the same design parameter, different designers will design different design results. In this paper, according to the design experience in engineering practice, This paper presents an effective design method based on Excel. Combining with the influencing factors of centrifugal pump performance, a sub-objective model is established for the objectives of high efficiency, high cavitation resistance, no hump curve and no power overload in the operation range during the design process. According to the practical design experience and the statistics of the excellent hydraulic model base coefficient, this paper puts forward the corresponding constraint conditions for the unified objective function. With the development of CFD technology, the unified objective function is improved and analyzed. The improvement of the accuracy of the calculation results has become an indispensable test design method in the field of centrifugal pump design and research. The solid modeling technology of impeller of segmental centrifugal pump based on Solidwoks is introduced in this paper. Flow simulation fluid analysis software is used to analyze the flow field inside the impeller.
【學(xué)位授予單位】：華北電力大學(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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本文編號(hào)：1996657