【摘要】：閥門作為工業(yè)發(fā)展中一個(gè)不可缺少的部分,已經(jīng)成為衡量一個(gè)國家生產(chǎn)水平的標(biāo)志,閥門產(chǎn)業(yè)的發(fā)展逐漸向著大容量、高參數(shù)、高要求、多效用以及自動化方向發(fā)展。傳統(tǒng)的閥門設(shè)計(jì)方法已經(jīng)不能促進(jìn)閥門產(chǎn)業(yè)的快速發(fā)展,計(jì)算機(jī)輔助設(shè)計(jì)將成為閥門設(shè)計(jì)發(fā)展的必然。本文主要通過CFD相關(guān)理論,由介質(zhì)對閥門的影響出發(fā),使用流體分析軟件Fluent、有限元分析軟件ANSYS進(jìn)行閥門的結(jié)構(gòu)、強(qiáng)度等一系列分析,實(shí)現(xiàn)閥門設(shè)計(jì)的智能化。 (1)首先通過已有閥門實(shí)驗(yàn)數(shù)據(jù)與仿真數(shù)據(jù)的對比,確定了一套適合連桿蝶閥分析的仿真模型,為本文后續(xù)分析提供了依據(jù)。 (2)利用驗(yàn)證模型對該連桿蝶閥進(jìn)行結(jié)構(gòu)、強(qiáng)度和流態(tài)分析,獲得大部分閥門的實(shí)驗(yàn)數(shù)據(jù)以及所需要的參數(shù),根據(jù)所得的數(shù)據(jù)結(jié)果,提出了結(jié)構(gòu)優(yōu)化的方案,并提出閥門操作存在的弊端。 (3)對閥門進(jìn)行結(jié)構(gòu)優(yōu)化,建立優(yōu)化后的連桿蝶閥模型,通過改進(jìn)前后對比,發(fā)現(xiàn)改進(jìn)后的蝶閥無論在功能上,還是在結(jié)構(gòu)上都比原蝶閥要好,證明了通過流體分析對蝶閥進(jìn)行的優(yōu)化是合理的。 (4)對連桿蝶閥進(jìn)行多場耦合分析,提出了蝶閥研究的新方法,驗(yàn)證了改進(jìn)后蝶閥在受到介質(zhì)壓力時(shí)變形量遠(yuǎn)遠(yuǎn)小于改進(jìn)前模型。 (5)對閥門的失效形式——汽蝕進(jìn)行了深入研究,從產(chǎn)生根源,到發(fā)展過程,最終到其所造成的破壞等,都進(jìn)行了詳盡的分析,其中使用了數(shù)學(xué)模型、流體仿真等多種方法,給出了避免汽蝕的方法。 本文從CFD入手,通過多種方法對閥門進(jìn)行剛度、強(qiáng)度、流阻、流態(tài)等多方面的分析,解決了閥門實(shí)驗(yàn)的巨大耗資問題,并且深入研究了閥門的失效形式,使閥門設(shè)計(jì)從傳統(tǒng)的經(jīng)驗(yàn)設(shè)計(jì)過渡到現(xiàn)代的智能設(shè)計(jì)。
[Abstract]:As an indispensable part of industrial development, valve has become a symbol to measure the production level of a country. The development of valve industry is gradually towards the direction of large capacity, high parameters, high requirements, multi-utility and automation. Traditional valve design method can not promote the rapid development of valve industry, computer aided design will become the inevitable development of valve design. Based on the theory of CFD and the influence of the medium on the valve, this paper uses the fluid analysis software Fluent, finite element analysis software ANSYS to analyze the structure and strength of the valve, so as to realize the intelligent design of the valve. The main contents are as follows: (1) by comparing the existing valve experimental data with the simulation data, a set of simulation model suitable for the analysis of the connecting rod butterfly valve is established, which provides the basis for the subsequent analysis of this paper. (2) the structure, strength and flow state of the connecting rod butterfly valve are analyzed by using the verification model. The experimental data of most valves and the required parameters are obtained. According to the obtained data, the scheme of structure optimization is proposed. The disadvantages of valve operation are also put forward. (3) optimize the structure of valve, establish the model of optimized connecting rod butterfly valve, and find that the improved butterfly valve is better than the original butterfly valve in function and structure by comparing before and after improvement. It is proved that the optimization of butterfly valve by fluid analysis is reasonable. (4) Multi-field coupling analysis of connecting rod butterfly valve is carried out, and a new method of butterfly valve research is put forward, which verifies that the modified butterfly valve is much smaller than the modified model when it is subjected to medium pressure. (5) the failure form of valve, cavitation, has been deeply studied, from the origin, to the development process, and finally to the damage caused by the valve, the mathematical model, fluid simulation and many other methods have been used. The method of avoiding cavitation is given. Starting with CFD, this paper analyzes the stiffness, strength, flow resistance and flow state of the valve by a variety of methods, solves the huge cost problem of the valve experiment, and deeply studies the failure form of the valve. Make valve design transition from traditional experience design to modern intelligent design.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH134

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本文編號：2395361