【摘要】：隨著市場(chǎng)經(jīng)濟(jì)的發(fā)展,閥門作為壓力管道元件廣泛應(yīng)用于國民生產(chǎn)、生活各個(gè)領(lǐng)域。由于大型閥門具有體積大、生產(chǎn)成本高、維修難度大、故障危害性強(qiáng)等特點(diǎn),故對(duì)設(shè)計(jì)生產(chǎn)提出較高要求,使得大型閥門的性能研究與結(jié)構(gòu)優(yōu)化意義重大。有限元技術(shù)的發(fā)展彌補(bǔ)了傳統(tǒng)設(shè)計(jì)方法在精度和效率方面的不足,對(duì)于提高大型閥門的設(shè)計(jì)質(zhì)量具有積極作用。以DN1800三偏心蝶閥為研究對(duì)象,應(yīng)用ANSYS Workbench軟件將蝶板、閥桿和密封圈整體作為研究對(duì)象進(jìn)行結(jié)構(gòu)靜力分析,從模型簡化、網(wǎng)格劃分和邊界條件三方面論述精細(xì)化分析方案,獲得針對(duì)大型蝶閥的有限元分析方法;通過蝶板應(yīng)力、應(yīng)變分布圖,實(shí)現(xiàn)閥門受力狀況、危險(xiǎn)部位的精確分析,提出結(jié)構(gòu)改進(jìn)方案,合理確定蝶板厚度、肋板厚度及分布等。應(yīng)用Workbench Fluent模塊對(duì)不同開度下的閥門進(jìn)行CFD模擬仿真,獲得各開度下的流態(tài)分布圖、流量系數(shù)及流阻系數(shù)值,提供一種流動(dòng)特性值的計(jì)算方法。最后,分別改變閥門的三個(gè)偏心值,通過對(duì)比分析獲得偏心值與閥門流動(dòng)特性之間的關(guān)系;采用正交試驗(yàn)法對(duì)三個(gè)偏心值進(jìn)行優(yōu)化,實(shí)現(xiàn)閥門流動(dòng)特性的優(yōu)化。本文針對(duì)大型閥門設(shè)計(jì)效率低、精度差的問題,采用有限元技術(shù)對(duì)閥門關(guān)鍵部件的靜力結(jié)構(gòu)及內(nèi)部流動(dòng)特性進(jìn)行模擬仿真,獲得了針對(duì)該閥門的最佳設(shè)計(jì)和分析方案,指導(dǎo)閥門設(shè)計(jì)與優(yōu)化。
[Abstract]:With the development of market economy, valve as a pressure pipeline element is widely used in Yu Guomin production, life in various fields. Because of the characteristics of large valve, such as large volume, high production cost, difficult maintenance and strong fault harmfulness, the high requirements for design and production are put forward, which makes the performance research and structure optimization of large valve of great significance. The development of finite element technology makes up for the shortcomings of traditional design methods in accuracy and efficiency, and plays a positive role in improving the design quality of large valves. Taking DN1800 trieccentric butterfly valve as the research object, the structural static analysis of butterfly plate, stem and sealing ring is carried out by using ANSYS Workbench software, and the fine analysis scheme is discussed from three aspects: model simplification, grid division and boundary conditions. The finite element analysis method for large butterfly valve is obtained. Through the stress and strain distribution map of butterfly plate, the accurate analysis of valve stress condition and dangerous part is realized, and the structural improvement scheme is put forward, and the thickness and distribution of butterfly plate thickness, ribbed plate and so on are reasonably determined. The CFD simulation of valves with different opening degrees is carried out by using Workbench Fluent module. The flow pattern distribution map, flow coefficient and flow resistance coefficient at each opening degree are obtained, and a calculation method of flow characteristic value is provided. Finally, the relationship between the eccentric value and the flow characteristics of the valve is obtained by comparing and analyzing the three eccentricity values of the valve, and the orthogonal test method is used to optimize the three eccentric values to realize the optimization of the flow characteristics of the valve. In order to solve the problems of low design efficiency and poor accuracy of large valve design, the static structure and internal flow characteristics of key parts of valve are simulated by finite element technique, and the best design and analysis scheme for the valve is obtained. Guide valve design and optimization.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TH134

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 凌曉;三偏心蝶閥的力矩計(jì)算及結(jié)構(gòu)優(yōu)化[D];蘭州理工大學(xué);2011年

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本文編號(hào)：2476724