大型蝶阀产品的结构有限元分析及优化研究
发布时间：2019-05-14 12:42
【摘要】：随着市场经济的发展,阀门作为压力管道元件广泛应用于国民生产、生活各个领域。由于大型阀门具有体积大、生产成本高、维修难度大、故障危害性强等特点,故对设计生产提出较高要求,使得大型阀门的性能研究与结构优化意义重大。有限元技术的发展弥补了传统设计方法在精度和效率方面的不足,对于提高大型阀门的设计质量具有积极作用。以DN1800三偏心蝶阀为研究对象,应用ANSYS Workbench软件将蝶板、阀杆和密封圈整体作为研究对象进行结构静力分析,从模型简化、网格划分和边界条件三方面论述精细化分析方案,获得针对大型蝶阀的有限元分析方法;通过蝶板应力、应变分布图,实现阀门受力状况、危险部位的精确分析,提出结构改进方案,合理确定蝶板厚度、肋板厚度及分布等。应用Workbench Fluent模块对不同开度下的阀门进行CFD模拟仿真,获得各开度下的流态分布图、流量系数及流阻系数值,提供一种流动特性值的计算方法。最后,分别改变阀门的三个偏心值,通过对比分析获得偏心值与阀门流动特性之间的关系;采用正交试验法对三个偏心值进行优化,实现阀门流动特性的优化。本文针对大型阀门设计效率低、精度差的问题,采用有限元技术对阀门关键部件的静力结构及内部流动特性进行模拟仿真,获得了针对该阀门的最佳设计和分析方案,指导阀门设计与优化。
[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.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH134
本文编号：2476724
[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.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH134
【参考文献】
相关硕士学位论文 前1条
1 凌晓;三偏心蝶阀的力矩计算及结构优化[D];兰州理工大学;2011年
，本文编号：2476724
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