摘要
为应对现代工业领域中日益增长的高温高压工况需求,采用有限元方法,对偏心半球阀进行温度-力学耦合数值模拟,深入探讨高温条件下的固体力学特性。对阀门三维模型进行处理,随后,利用多物理场耦合技术,在标准环境温度(20℃)和高温工况(300℃)下,对阀门整体及其核心部件的应力与应变进行多物理场耦合仿真分析。研究结果显示:在标准环境温度下,阀门的最大应力为243 MPa,最大变形量为0.087 mm;而在高温条件下,最大应力增至244 MPa,最大变形量为0.094 mm。与相关材料标准进行对比验证后发现,变形量处于可接受范围内,但在设计压力作用下,阀门内流道的部分应力超过了允许值。将材料替换为17-4PH之后,阀门满足相关的性能标准。还通过一系列温度条件下应力与应变的综合分析,拟合出应力与变形随温度变化的规律曲线,为偏心半球阀在高温工况下的应力-应变分析提供了参考,并为进一步的优化提供支持。
To address the growing demands for high-temperature and high-pressure operating conditions in modern industrial fields,the finite element method was employed to conduct a coupled thermal-mechanical numerical simulation of eccentric stmi-ball valves,delving into its solid mechanics characteristics under high-temperature conditions.The three-dimensional model of the valve was processed,followed by the use of multiphysics coupling technology to perform a multiphysics coupling simulation analysis on the overall valve and its core components under standard environmental temperature(20℃)and high-temperature operating conditions(300℃).The results indicate that under standard environmental temperatures,the maximum stress on the valve is 243 MPa,with a maximum deformation of 0.087 mm;whereas under high-temperature conditions,the maximum stress increases to 244 MPa,and the maximum deformation is 0.094 mm.After comparing and validating these results with relevant material standards,it was found that the deformation is within acceptable limits.However,under design pressure,some parts of the valve′s internal flow channel experienced stresses exceeding allowable values.By replacing the material with 17-4PH,the valve met the relevant performance standards.Furthermore,through comprehensive analysis of stress and strain distribution across a series of temperature conditions,curves representing the relationship between stress and deformation changes with temperature were fitted.This provides reference for the stress-strain analysis of eccentric half-sphere valves under high-temperature operating conditions and supports for further optimization efforts.
作者
朱鹏鹏
毕祯
徐鹏
周盛华
陈长青
刘飞飞
陈强
梁培
ZHU Pengpeng;BI Zhen;XU Peng;ZHOU Shenghua;CHEN Changqing;LIU Feifei;CHEN Qiang;LIANG Pei(College of Metrology Measurement and Instrument,China Jiliang University,Hangzhou Zhejiang 310018,China;College of Energy and Environment and Safety Engineering,China Jiliang University,Hangzhou Zhejiang 310018,China;College of Optical and Electronic Technology,China Jiliang University,Hangzhou Zhejiang 310018,China;Tix Technology Group Lishui Fluid Equipment Co.,Ltd.,Lishui Zhejiang 323006,China)
出处
《机床与液压》
北大核心
2025年第21期174-180,共7页
Machine Tool & Hydraulics
基金
浙江省“尖兵领雁+X”研发攻关计划(2024C01228)。
关键词
偏心半球阀
有限元分析
热固耦合
应力场
优化设计
eccentric stmi-ball valve
finite element analysis
thermo-solid coupling
stress field
optimized design
