【摘要】：大口徑多級(jí)消能固定錐形閥與普通固定錐形閥的區(qū)別是閥門出口帶有一個(gè)特殊設(shè)計(jì)的導(dǎo)流罩,同時(shí)大口徑多級(jí)消能固定錐形閥進(jìn)行了多項(xiàng)創(chuàng)新設(shè)計(jì),具有普通固定錐形閥的所有特點(diǎn),除了可用于普通固定錐形閥的對(duì)空消能或者淹沒消能場合外,還可應(yīng)用于高壓差及管中消能的場合。目前對(duì)大口徑多級(jí)消能固定錐形閥結(jié)構(gòu)優(yōu)化設(shè)計(jì)的研究很少,本文利用結(jié)構(gòu)優(yōu)化設(shè)計(jì)理論和有限元分析方法對(duì)該類產(chǎn)品進(jìn)行優(yōu)化研究,能夠提高產(chǎn)品的可靠性,降低制造的成本。通過對(duì)該類產(chǎn)品進(jìn)行CFD數(shù)值模擬計(jì)算,計(jì)算其流量系數(shù),了解其消能效果。本文研究內(nèi)容及結(jié)論主要體現(xiàn)在以下幾方面:(1)對(duì)固定錐形閥的結(jié)構(gòu)和原理進(jìn)行分析。結(jié)合某電站項(xiàng)目,分析其使用工況,提出了一種新的多級(jí)消能導(dǎo)流罩結(jié)構(gòu),應(yīng)用于管中消能場合。(2)模擬強(qiáng)度試驗(yàn)和密封試驗(yàn)工況,通過SolidWorks Simulation軟件對(duì)該電站DN2400、PN16固定錐形閥初設(shè)方案進(jìn)行分析和優(yōu)化,使產(chǎn)品達(dá)到了輕量化的要求。采用應(yīng)力應(yīng)變及位移試驗(yàn)對(duì)生產(chǎn)的產(chǎn)品實(shí)物進(jìn)行應(yīng)力評(píng)估和位移測量,將實(shí)測結(jié)果與有限元分析計(jì)算數(shù)值進(jìn)行比較,結(jié)果表明實(shí)測值與有限元計(jì)算值基本一致,優(yōu)化設(shè)計(jì)的結(jié)果滿足設(shè)計(jì)要求,從而驗(yàn)證了有限元計(jì)算方法的準(zhǔn)確性,可用于設(shè)計(jì)指導(dǎo)。(3)通過對(duì)三種固定錐形閥及閥后消能結(jié)構(gòu)的CFD數(shù)值分析比較,選出較優(yōu)的閥后消能結(jié)構(gòu)。(4)提出了模型試驗(yàn)的方法,并按照相似性理論制造縮小比例的DN250、PN16固定錐形閥及閥后消能結(jié)構(gòu)模型,完成模擬工況下的閥門消能試驗(yàn),將試驗(yàn)測試結(jié)果換算出的流量系數(shù)、消能率與通過ANSYS Fluent軟件數(shù)值分析計(jì)算出的流量系數(shù)、消能率進(jìn)行對(duì)比分析,證明CFD計(jì)算方法的原理及相關(guān)公式的正確性。本文通過對(duì)大口徑多級(jí)消能固定錐形閥設(shè)計(jì)優(yōu)化研究,建立了一套固定錐形閥的設(shè)計(jì)優(yōu)化方法、流量系數(shù)、應(yīng)力應(yīng)變和位移的計(jì)算分析方法,同時(shí)建立了試驗(yàn)?zāi)Ｐ筒⑦M(jìn)行了試驗(yàn),將試驗(yàn)數(shù)據(jù)與數(shù)值分析值進(jìn)行對(duì)比分析,得出了一些有價(jià)值的結(jié)論,為國內(nèi)大型水利工程中大口徑固定錐形閥的設(shè)計(jì)和研究提供了一套可行的方法,可縮短設(shè)計(jì)周期,降低制造成本,本研究對(duì)固定錐形閥的設(shè)計(jì)有深刻的指導(dǎo)意義。
[Abstract]:The difference between large caliber multistage fixed cone valve and common fixed cone valve is that the valve outlet has a specially designed flow guide cover, and at the same time, the large caliber multi stage energy dissipation fixed cone valve has carried out many innovative designs. It has all the characteristics of common fixed conical valve. It can be used not only for air energy dissipation or submerged energy dissipation of general fixed cone valve, but also for high pressure difference and energy dissipation in pipe. At present, there is little research on the structural optimization design of large caliber multi-stage energy dissipation fixed conical valve. In this paper, the structural optimization design theory and finite element analysis method are used to optimize this kind of products, which can improve the reliability of the products. Reduce the cost of manufacturing. Through the CFD numerical simulation of this kind of products, the flow coefficient is calculated and the energy dissipation effect is understood. The main contents and conclusions of this paper are as follows: (1) the structure and principle of the fixed conical valve are analyzed. In this paper, a new multistage energy dissipation guide cover structure is put forward based on the analysis of the operating conditions of a power station project. (2) the strength test and sealing test condition are simulated, and the DN2400, of the power station is analyzed by SolidWorks Simulation software. The initial design of PN16 fixed conical valve was analyzed and optimized to meet the requirement of lightweight. The stress, strain and displacement tests are used to evaluate and measure the stress and displacement of the products. The measured results are compared with the calculated values of finite element analysis. The results show that the measured values are in good agreement with the calculated values of the finite element method. The results of the optimization design meet the design requirements, which verify the accuracy of the finite element method and can be used to guide the design. (3) through the CFD numerical analysis and comparison of three fixed cone valves and their rear energy dissipation structures, (4) the method of model test is put forward, and according to the similarity theory, the DN250,PN16 fixed cone valve and the back energy dissipation structure model are manufactured to complete the valve energy dissipation test under simulated working condition. The flow coefficient, the energy dissipation rate and the flow coefficient calculated by the numerical analysis of the ANSYS Fluent software are compared and analyzed. The principle of the CFD calculation method and the relevant formula are proved to be correct. In this paper, by studying the design optimization of large caliber multistage fixed cone valve, a set of design optimization method, flow coefficient, stress strain and displacement analysis method of fixed cone valve are established. At the same time, the experimental model is established and the experimental data are compared with the numerical analysis values, and some valuable conclusions are obtained. This paper provides a set of feasible methods for the design and research of large caliber fixed conical valve in large water conservancy projects in China, which can shorten the design period and reduce the manufacturing cost. This study has a profound guiding significance for the design of fixed tapered valve.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TH134

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 章福儀;錐形閥水力特性的幾點(diǎn)研究[J];水利水電技術(shù);1963年01期

2 李維藩;汾河水庫錐形閥放水情況調(diào)查[J];水利水電技術(shù);1963年05期

3 A·T·卡維什尼科夫,邵先榮;裝有噴嘴的錐形閥[J];水利水電快報(bào);1998年16期

4 傅南山;汾河水庫錐形閥設(shè)計(jì)簡介[J];水利水電技術(shù);1962年03期

5 章見平,程忠理,林江;牛頭山水庫錐形閥改造分析[J];浙江水利水電�？茖W(xué)校學(xué)報(bào);2002年02期

6 李娟;內(nèi)套筒式錐形閥在南陽渠工程中的應(yīng)用[J];發(fā)展;2001年S1期

7 程碧周;;錐形閥閥體制造工藝與焊接技術(shù)[J];廣東水利水電;2009年12期

8 戴相富,周和平,龐東曉,劉清友,莫麗;自動(dòng)錐形閥運(yùn)動(dòng)規(guī)律數(shù)學(xué)模型及仿真[J];石油機(jī)械;2003年08期

9 閻秋霞;;大口徑調(diào)流閥應(yīng)用研究[J];水利建設(shè)與管理;2012年05期

10 李新民;;回料和排渣錐形閥常見問題的分析[J];華電技術(shù);2008年08期

，

本文編號(hào)：2336207