一次机五段后冷却器高压管箱隔膜密封结构设计  

STRUCTURE DESIGN OF DIAPHRAGM SEAL IN THE HIGH-PRESSURE CHANNEL OF FIFTH-SECTION AFTER-COOLER OF PRIMARY COMPRESSOR

作　　者：陈孙艺 李志海[2,3] 钟经山 Chen Sunyi;Li Zhihai;Zhong Jingshan(The Challenge Petrochemical Machinery Corporation of Maoming,Maoming,Guangdong,525024;Guangdong Provincial Key Lab.of Petrochemical Equipment and Fault Diagnosis,Guangdong University of Petrochemical Technology,Maoming,Guangdong,525000;Guangdong Provincial Research Center for Petrochemical Equipment and Technology,Guangdong University of Petrochemical Technology,Maoming,Guangdong,525000;CNOOC and Shell Petrochemical Company Limited,Huizhou,Guangdong,516086)

机构地区：[1]茂名重力石化装备股份公司,广东茂名525024 [2]广东石油化工学院广东省石化装备故障诊断重点实验室,广东茂名525000 [3]广东石油化工学院广东省石油化工装备工程技术研究中心,广东茂名525000 [4]中海壳牌石油化工有限公司,广东惠州516086

出　　处：《石油化工设备技术》2020年第1期54-60,I0005,I0006,共9页Petrochemical Equipment Technology

基　　金：广东省自然科学基金-粤东西北创新人才联合培养项目(2018A030307042)

摘　　要：为了精确设计某后冷器管箱端口球面隔膜密封结构,分别根据弹性力学理论和JB 4732-1995标准的有关解析式,对内压作用下高压管箱圆筒短节的径向位移进行了计算分析,并采用有限元模型分析进行比较验证,之后再结合操作工况主要参数的影响确定了隔膜的优化结构。经工程实践验证,结果表明:根据标准中的薄膜解析式计算的径向位移应用于本案例已具有足够的工程精度;球面隔膜比平面隔膜具有更大的径向弹性补偿作用,能改善密封紧固件的受力状况;管箱短节上组焊的内、外附件有加强作用,但是会引起端口径向位移沿周向分布的显著不均匀性,不利于密封。In order to design the spherical diaphragm seal structure of channel cover of certain after-cooler accurately,this paper calculates and analyzes the radial displacement of the cylinder short section of the high-pressure channel under internal pressure according to the theory of elasticity and the relevant analytical formulas in JB 4732-1995 standard.And the finite element model analysis is adopted to compare and verify the results.Then combining with the impacts of main operating condition parameters,the optimum structure of the diaphragm is determined.The results show through verification of engineering practice that the radial displacement calculated by the analytical formulas of thin film in the standard in this case has sufficient engineering accuracy;the spherical diaphragm has more potential radial elastic compensation than the planar diaphragm,which can improve the stress condition of sealing fasteners;the internal and external attachments of group welding on the short section of the channel have strengthening effect,but it will cause notable non-uniformity of radial displacement distribution along the circumference position,which is not conducive to sealing.

关 键 词：隔膜密封 密封设计 应力分析 脉动载荷 管箱 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]