流体机械

2021, v.49;No.585(03) 34-39+67

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阀门中法兰瞬态温度波动密封性能研究
Study on sealing performance of flange in valve under transient temperature fluctuation

姜峰;杨曦;赵维乐;周文海;陈斐;俞瑞利;
JIANG Feng;YANG Xi;ZHAO Weile;ZHOU Wenhai;CHEN Fei;YU Ruili;Institute of Petro-chemical Technology,Lanzhou University of Technology;Sichuan Xinchuan Aviation Instrument Co.,Ltd.;

摘要(Abstract):

根据传热学理论建立传热学模型,运用ANSYS有限元分析软件建立三维有限元模型和温度场,以瞬态温度场和热-结构耦合为基础,研究了不同升温速度对垫片密封性的影响。结果表明:受温度影响产生的热应力会造成法兰接头各元件应力及变形的变化,并且一定程度上会加剧垫片应力不均匀;并且升温速度越快,垫片应力下降越快,变形量增加越快,对密封造成的不良影响越大。另外本文还采用瞬态温度场对温度波动工况进行了研究,结果表明,温度波动会导致垫片内外侧变形增大而应力减小,大大降低密封可靠性。
A heat transfer model is established based on the heat transfer theory,and a three-dimensional finite element model and the temperature field are built by the ANSYS finite element analysis software.Based on the transient temperature field and thermal-structural coupling,the effects of different heating rates on the gasket sealing performance are investigated.The results show that the thermal stress caused by temperature will change the stress and deformation of each element of flange joint and increase the uneven stress of gasket to some extent.And the faster the temperature rises,the faster the gasket stress decreases,the faster the deformation increases,and the greater the effect on the sealing performance.In addition,the transient temperature field is used to study the temperature fluctuation conditions.The results show that the temperature fluctuation will cause the deformation of the inner and outer sides of the gasket to increase and the stress to decrease,which will greatly reduces the gasket sealing reliability.

关键词(KeyWords): 法兰;高温;瞬态;热-结构耦合;密封性
flange;high temperature;transient;thermal-structural coupling;sealing

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基金项目(Foundation): 国家自然科学基金项目(51566010);; 甘肃省自然科学基金项目(B061709)

作者(Author): 姜峰;杨曦;赵维乐;周文海;陈斐;俞瑞利;
JIANG Feng;YANG Xi;ZHAO Weile;ZHOU Wenhai;CHEN Fei;YU Ruili;Institute of Petro-chemical Technology,Lanzhou University of Technology;Sichuan Xinchuan Aviation Instrument Co.,Ltd.;

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