考虑热膨胀差影响的双锥密封性能研究与应用
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摘要
针对高温高压容器双锥密封的失效问题,运用变形协调原理和内力平衡方程,将预紧与操作两个工况之间的热膨胀差引入双锥密封机理,提出了"热当量间隙ΔU"的概念,并关注其对操作密封比压q、拐点压力p_c、最小操作密封比压q_c的影响。同时,考虑热当量间隙后,推导了在操作工况下的螺栓载荷W_o计算通用公式,并以此分析和解决了实际高温高压容器双锥密封的泄漏问题。
For the failure problem of double-cone seal of high-temperature and high-pressure vessel,in this paper the thermal expansion difference between pre-tightening and operating conditions is introduced into the mechanism of double-cone seal using the deformation compatibility principle and internal force balance equation,the concept of "thermal equivalent clearance ΔU" is put forward and attention is given to its influence on operating sealing pressure q,inflexion point pressure pcand minimum operating sealing pressure qc. At the same time,considering the thermal equivalent clearance,the general formula for calculating the bolt load under operating conditions is deduced,and the leakage problem of the double-cone seal of high-temperature and high-pressure vessel is analyzed and solved.
For the failure problem of double-cone seal of high-temperature and high-pressure vessel,in this paper the thermal expansion difference between pre-tightening and operating conditions is introduced into the mechanism of double-cone seal using the deformation compatibility principle and internal force balance equation,the concept of "thermal equivalent clearance ΔU" is put forward and attention is given to its influence on operating sealing pressure q,inflexion point pressure pcand minimum operating sealing pressure qc. At the same time,considering the thermal equivalent clearance,the general formula for calculating the bolt load under operating conditions is deduced,and the leakage problem of the double-cone seal of high-temperature and high-pressure vessel is analyzed and solved.
引文
[1]盛水平,韩树新,郑津洋,等.高压容器双锥环密封性能的研究[J].工程力学,2010,27(5):173-178.
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[3]吕理荣,胡天然,刘志杰.双锥密封的初步试验与研究(三)---高温密封试验[J].化工与通用机械,1979(8):1-7.
[4]蔡仁良,郑建荣,岑红.高压分离器双锥环密封失效的数值模拟[J].华东理工大学学报,1998,24(2):181-185.
[5]张伯君,郑津洋,马利,等.大直径双锥密封结构设计[C]//第七届全国压力容器设计学术会议---压力容器设计技术研究.2010.
[6]宗磊.双锥环密封系统的应用研究[D].天津:天津大学,2014.
[7]高永建.大型高压容器双锥密封结构设计方法研究[D].杭州:浙江大学,2008.
[8]盛水平,韩树新,郑津洋.高压容器双锥环密封径向间隙的研究[J].润滑与密封,2010,35(6):81-84.
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[11]王冰清,余三成,孟祥铠,等.高压星形密封圈的密封性能分析[J].流体机械,2017,45(8):37-42.
[12]朱斌,廖长洋,林晓平,等.高温导热油旋转接头应用中的事故分析和预防措施[J].流体机械,2017,45(11):58-60.
[13]杨绮云,高靖宇.食品超高压设备金属密封圈失效机理及有限元分析[J].包装与食品机械,2013,31(3):34-37.
[14]全国化工设备技术中心站.钢制化工容器强度计算规定:HG/T 20582-2011[S].北京:中国标准出版社,2011:417.
[15]CEN.Unfired Pressure Vessel-Part 3:Design,Annex G:EN 13445-3[S].EUROPEAN:CEN national Members,2015:669-670.
[16]匡良明,罗展慧,甘望星.ASME法兰刚度与转角关系的验证及转角极限的确定[J].化工设备与管道,2018,55(1):20-24.
[17]ASME.Guidelines for Pressure Boundary Bolted Flange Joint Assemble:PCC-1[S].USA:ASME,2010:57-68.
[18]蒲弦.双锥密封结构设计[J].化工设计,2013,23(2):26-29.
[19]于跃.双锥环在预紧过程中密封问题的解决方法[J].一重技术,2007,119(5):17-19.
[2]通用机械研究所高压组.双锥密封的初步试验与研究[J].化工与通用机械,1975(1):13-34.
[3]吕理荣,胡天然,刘志杰.双锥密封的初步试验与研究(三)---高温密封试验[J].化工与通用机械,1979(8):1-7.
[4]蔡仁良,郑建荣,岑红.高压分离器双锥环密封失效的数值模拟[J].华东理工大学学报,1998,24(2):181-185.
[5]张伯君,郑津洋,马利,等.大直径双锥密封结构设计[C]//第七届全国压力容器设计学术会议---压力容器设计技术研究.2010.
[6]宗磊.双锥环密封系统的应用研究[D].天津:天津大学,2014.
[7]高永建.大型高压容器双锥密封结构设计方法研究[D].杭州:浙江大学,2008.
[8]盛水平,韩树新,郑津洋.高压容器双锥环密封径向间隙的研究[J].润滑与密封,2010,35(6):81-84.
[9]周智斌.双锥密封环内柱面与大盖圆柱支承面之间径向间隙探讨[J].小氮肥,2009,37(8):4-6.
[10]吴云龙.自紧式八角垫密封结构研究与探讨[J].压力容器,2017,34(11):47-54.
[11]王冰清,余三成,孟祥铠,等.高压星形密封圈的密封性能分析[J].流体机械,2017,45(8):37-42.
[12]朱斌,廖长洋,林晓平,等.高温导热油旋转接头应用中的事故分析和预防措施[J].流体机械,2017,45(11):58-60.
[13]杨绮云,高靖宇.食品超高压设备金属密封圈失效机理及有限元分析[J].包装与食品机械,2013,31(3):34-37.
[14]全国化工设备技术中心站.钢制化工容器强度计算规定:HG/T 20582-2011[S].北京:中国标准出版社,2011:417.
[15]CEN.Unfired Pressure Vessel-Part 3:Design,Annex G:EN 13445-3[S].EUROPEAN:CEN national Members,2015:669-670.
[16]匡良明,罗展慧,甘望星.ASME法兰刚度与转角关系的验证及转角极限的确定[J].化工设备与管道,2018,55(1):20-24.
[17]ASME.Guidelines for Pressure Boundary Bolted Flange Joint Assemble:PCC-1[S].USA:ASME,2010:57-68.
[18]蒲弦.双锥密封结构设计[J].化工设计,2013,23(2):26-29.
[19]于跃.双锥环在预紧过程中密封问题的解决方法[J].一重技术,2007,119(5):17-19.