弯矩作用下双楔角环垫法兰接头的密封性能
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摘要
螺栓法兰接头除受管道内压外,还承受外弯矩的作用,且外弯矩导致的变形及转角通常是直接导致法兰接头密封失效的主要原因。为研究外弯矩作用下双楔角环垫法兰接头的密封性能,以某轻量化双楔角环垫法兰接头为研究对象,利用ABAQUS有限元软件建立其有限元模型,分析在外弯矩作用下该轻量化双楔角环垫法兰接头的密封性能。结果表明:弯矩的作用使垫片应力在周向分布不均匀;随着弯矩增加,主、从密封面的最大接触应力也随之增大,环垫主面有效密封宽度明显增加,从面有效密封宽度先小幅下降后增大;随着弯矩的增大,法兰转角也有所增大,轻量化法兰最大偏转角度约为0.005°,远低于ASME规范中要求的0.3°。根据JB 4732对该轻量化双楔角环垫法兰进行应力强度评定,证明其满足使用条件。
Bolted flange joints are subjected to external bending moments in addition to the internal pressure in the pipeline,and the deformation and cornering caused by external bending moments are usually the main cause of the sealing failure of the flange joints.In order to study the sealing performance of the double wedge wedge flange joint under the action of the external bending moment,the ABAQUS was utilized to calculate the sealing performance of lightly double wedge angle ring gasket joint under the bending moment.The results show that the stress of the gasket is unevenly distributed in the circumferential direction by the action of the bending moment.With the increasing of the bending moment,the maximum contact stress of the master-slave sealing surfaces is increased,the effective sealing width of master surface is obviously increased,and the effective sealing width of slave surface is firstly decreased slightly and then increased.With the increasing of bending moment,the angle of the flange is also increased,the maximum deflection angle is about 0.005 degrees,it was lower than the 0. 3 degrees required in ASME standard criteria. According to the JB4732,the lightly double wedge angle ring gasket joints are safety under the service conditions.
Bolted flange joints are subjected to external bending moments in addition to the internal pressure in the pipeline,and the deformation and cornering caused by external bending moments are usually the main cause of the sealing failure of the flange joints.In order to study the sealing performance of the double wedge wedge flange joint under the action of the external bending moment,the ABAQUS was utilized to calculate the sealing performance of lightly double wedge angle ring gasket joint under the bending moment.The results show that the stress of the gasket is unevenly distributed in the circumferential direction by the action of the bending moment.With the increasing of the bending moment,the maximum contact stress of the master-slave sealing surfaces is increased,the effective sealing width of master surface is obviously increased,and the effective sealing width of slave surface is firstly decreased slightly and then increased.With the increasing of bending moment,the angle of the flange is also increased,the maximum deflection angle is about 0.005 degrees,it was lower than the 0. 3 degrees required in ASME standard criteria. According to the JB4732,the lightly double wedge angle ring gasket joints are safety under the service conditions.
引文
【1】诸士春,刘雪东,刘文明,等.弯矩作用下带Ni Ti垫片的法兰连接有限元分析[J].固体火箭技术,2016,39(5):685-691.ZHU S C,LIU X D,LIU W M,et al.Analysis on flange joints with Ni Ti gasket under bending using FEM[J].Journal of Solid Rocket Technology,2016,39(5):685-691.
【2】KUROKOUCHI S,OKABE M,MORITA S.Taper-seal type metal sealing system and available applications[J].Applied Surface Science,2001,169(1/2):799-802.
【3】MADAZHY R,MATHEWS S,HOWARD E.Analysis of contact pressure distribution on 3-bolt self-energized connector seals[C]//Proceedings of ASME 2009 Pressure Vessels&Piping Conference.Prague:ASME,2010:71-79.
【4】GARDNER C,MADAZHY R,HOWARD E.Analysis of contact pressure distribution on a pass partition gasket in conjunction with a double-tapered seal in a high pressure heat exchanger closure[C]//Proceedings of ASME 2009 Pressure Vessels&Piping Conference.Washington:ASME,2010:297-303.
【5】HOWARD E M.Systems and methods for making connections between pipe sections to form a conduit that is substantially free of gaps:7748751[P].2010-06-07.
【6】韩宇,栗国浩,袁李峰.Taper-Lok法兰在海底管线上的应用[J].石油矿场机械,2008,37(6):88-89.HAN Y,LI G H,YUAN L F.Application of taper-lok flanges on subsea pipelines[J].Oil Field Equipment,2008,37(6):88-89.
【7】刘贞飞,张印桐,严国华.Taper-Lok法兰在南海海管连接中的应用[J].中国水运(下半月刊),2010(10):223-225.
【8】陆晓峰,徐永杰.新型双楔角环垫结构参数显著性分析与设计[J].固体火箭技术,2014,37(2):247-252.LU X F,XU Y J.Significant analysis and design on the structure parameters of a new double wedge angle ring gasket[J].Journal of Solid Rocket Technology,2014,37(2):247-252.
【9】卢军.基于自紧式双楔角环垫的法兰轻量化研究[D].南京:南京工业大学,2017.
【10】盛涛涛.高温下承受外弯矩的法兰接头完整性分析[D].上海:华东理工大学,2014.
【11】赵奕斌.压力容器材料实用手册:碳钢及合金钢常用[M].北京:化学工业出版社,2000.
【12】诸士春,陆晓峰,巩建鸣.Al包覆层厚度对Al-Ni Ti复合垫片密封面压紧力影响的有限元分析[J].固体火箭技术,2012,35(5):683-687.ZHU S C,LU X F,GONG J M.Effect of Al cover thickness on contact stressof Al-Ni Ti gasket using FEM[J].Journal of Solid Rocket Technology,2012,35(5):683-687.
【13】徐永杰,陆晓峰.新型双楔角环垫结构参数对密封接触压力的影响[J].固体火箭技术,2013,36(6):805-810.XU Y J,LU X F.Effect of structure parameters of a new double wedge angle ring gasket on its seal contact pressure[J].Journal of Solid Rocket Technology,2013,36(6):805-810.
【14】中国质检总局和标准化委员会.压力容器:GB 150-2011[S].北京:中国标准出版社,2012.
【15】ASME.Boiler and pressure vessel code,SectionⅧ,DivisionⅠ[S].New York:American Society of Mechanical Engineers,2010.
【16】卢均臣.基于蠕变的高温法兰强度与密封分析[D].上海:华东理工大学,2012.
【17】钢制压力容器:分析设计标准:JB/T4732-2005[S].
【18】秦叔经.应力分类方法的几点讨论[J].化工设备与管道,2013(2):1-7.
【2】KUROKOUCHI S,OKABE M,MORITA S.Taper-seal type metal sealing system and available applications[J].Applied Surface Science,2001,169(1/2):799-802.
【3】MADAZHY R,MATHEWS S,HOWARD E.Analysis of contact pressure distribution on 3-bolt self-energized connector seals[C]//Proceedings of ASME 2009 Pressure Vessels&Piping Conference.Prague:ASME,2010:71-79.
【4】GARDNER C,MADAZHY R,HOWARD E.Analysis of contact pressure distribution on a pass partition gasket in conjunction with a double-tapered seal in a high pressure heat exchanger closure[C]//Proceedings of ASME 2009 Pressure Vessels&Piping Conference.Washington:ASME,2010:297-303.
【5】HOWARD E M.Systems and methods for making connections between pipe sections to form a conduit that is substantially free of gaps:7748751[P].2010-06-07.
【6】韩宇,栗国浩,袁李峰.Taper-Lok法兰在海底管线上的应用[J].石油矿场机械,2008,37(6):88-89.HAN Y,LI G H,YUAN L F.Application of taper-lok flanges on subsea pipelines[J].Oil Field Equipment,2008,37(6):88-89.
【7】刘贞飞,张印桐,严国华.Taper-Lok法兰在南海海管连接中的应用[J].中国水运(下半月刊),2010(10):223-225.
【8】陆晓峰,徐永杰.新型双楔角环垫结构参数显著性分析与设计[J].固体火箭技术,2014,37(2):247-252.LU X F,XU Y J.Significant analysis and design on the structure parameters of a new double wedge angle ring gasket[J].Journal of Solid Rocket Technology,2014,37(2):247-252.
【9】卢军.基于自紧式双楔角环垫的法兰轻量化研究[D].南京:南京工业大学,2017.
【10】盛涛涛.高温下承受外弯矩的法兰接头完整性分析[D].上海:华东理工大学,2014.
【11】赵奕斌.压力容器材料实用手册:碳钢及合金钢常用[M].北京:化学工业出版社,2000.
【12】诸士春,陆晓峰,巩建鸣.Al包覆层厚度对Al-Ni Ti复合垫片密封面压紧力影响的有限元分析[J].固体火箭技术,2012,35(5):683-687.ZHU S C,LU X F,GONG J M.Effect of Al cover thickness on contact stressof Al-Ni Ti gasket using FEM[J].Journal of Solid Rocket Technology,2012,35(5):683-687.
【13】徐永杰,陆晓峰.新型双楔角环垫结构参数对密封接触压力的影响[J].固体火箭技术,2013,36(6):805-810.XU Y J,LU X F.Effect of structure parameters of a new double wedge angle ring gasket on its seal contact pressure[J].Journal of Solid Rocket Technology,2013,36(6):805-810.
【14】中国质检总局和标准化委员会.压力容器:GB 150-2011[S].北京:中国标准出版社,2012.
【15】ASME.Boiler and pressure vessel code,SectionⅧ,DivisionⅠ[S].New York:American Society of Mechanical Engineers,2010.
【16】卢均臣.基于蠕变的高温法兰强度与密封分析[D].上海:华东理工大学,2012.
【17】钢制压力容器:分析设计标准:JB/T4732-2005[S].
【18】秦叔经.应力分类方法的几点讨论[J].化工设备与管道,2013(2):1-7.