【作者】 庞梦飞； 惠虎； 耿圣陶； 王渭； 黄淞； 薛广珂；

【Author】 PANG Mengfei;HUI Hu;GENG Shengtao;WANG Wei;HUANG Song;XUE Guangke;School of Mechanical and Power Engineering,East China University of Science and Technology,Key Laboratory of Pressure Systems and Safety,Ministry of Education;Hefei General Machinery Research Institute Co.,Ltd.;

【机构】 华东理工大学机械与动力工程学院承压系统安全教育部重点实验室； 合肥通用机械研究院有限院公司；

【摘要】 针对现行超高压阀体设计方法普遍偏保守的问题,本文采用弹塑性有限元分析方法,研究不同结构参数对阀体安全裕度的影响。结果表明,按爆破安全系数4.0设计的阀体塑性垮塌压力为739.64 MPa,安全裕度约为2.79,远高于规范要求。随着阀体长度的增加,安全裕度提高;支管直径增大则导致安全裕度降低。当长度较短或支管直径过大时,安全裕度接近下限,存在失效风险。研究表明,现行设计方法在常规结构下存在较大冗余,具备减薄壁厚、优化设计的空间。但对于过短或支管过大的阀体结构,应提高安全系数或改进设计方法,以确保安全裕度。本研究结果可为超高压阀体设计优化和设计标准完善提供参考。更多还原

【Abstract】 To address the generally conservative nature of current ultra-high-pressure(UHP)valve body design methods,an elastic-plastic finite element analysis was conducted to investigate the influence of various structural parameters on the safety margin of valve bodies.The results revealed that a valve body designed based on a bursting safety factor of 4.0 exhibited a plastic collapse pressure of 739.64 MPa,corresponding to a safety margin of approximately 2.79,which significantly exceeds the standard requirements.It was found that the safety margin increased with valve body length,while it decreased with larger branch pipe diameters.When the body length was too short or the branch diameter excessively large,the safety margin approached the lower threshold,posing a potential risk of failure.The findings indicate that existing design methods exhibit substantial redundancy for typical structures,suggesting potential for wall thickness reduction and design optimization.However,for valve bodies with short lengths or oversized branch connections,an increased safety factor or improved design methodology is recommended to ensure sufficient safety margins.The results of this study may serve as a reference for the optimization of UHP valve body design and the refinement of relevant design standards.更多还原