液压胀接残余接触压力计算及相关参数影响分析  

Calculation of Residual Contact Pressure of Hydraulic Expansion Joint and Influence Analysis of Related Parameters

作　　者：宋利滨[1] 朱国栋[1] 李涌泉[1] Song Libin;Zhu Guodong;Li Yongquan(Technology Innovation Center of Risk Prevention and Control of Refining and Chemical Equipment for State Market Regulation,China Special Equipment Inspection and Research Institute,Beijing 100029,China)

机构地区：[1]国家市场监管技术创新中心(炼油与化工装备风险防控),中国特种设备检测研究院,北京100029

出　　处：《化工设备与管道》2023年第6期18-24,共7页Process Equipment & Piping

基　　金：国家市场监督管理总局科技计划项目(项目编号:2020MK182);中国特检院二级学科(项目编号:2021XKTD003)。

摘　　要：胀接压力适宜控制范围的确定,关键在于准确计算胀接后换热管与管板间的残余接触压力。现有残余接触压力理论计算方法忽视换热管反向屈服问题,导致残余接触压力计算值与实际不符。文中基于材料理想弹塑性和平面应变假设,给出了Mises屈服准则下胀接残余接触压力理论计算方法详细推导过程,讨论分析了换热管弹性模量、屈服强度、壁厚等变化对残余接触压力的影响,该方法可适用于先焊后胀胀接工艺下胀接残余接触压力预测。The key to determining the appropriate control range of the expansion pressure is to accurately calculate the residual contact pressure between the heat exchange tubes and the tubesheets after expansion.The existing theoretical calculation methods of residual contact pressure ignore the reverse yielding problem of the heat exchange tubes,which leads to the calculation value of residual contact pressure is inconsistent with the actual value.Based on the assumption of ideal elastic-plastic and plane strain of materials,a detailed derivation process of the theoretical calculation method for residual contact pressure in expansion joints under the Mises yield criterion is presented in this paper.The influence of changes in elastic modulus,yield strength,wall thickness,etc.of heat exchange tubes on residual contact pressure is discussed and analyzed.This method can be applied to predict residual contact pressure in expansion joints under the process of welding first and then expanding.

关 键 词：液压胀接 残余接触压力 换热管 管板 数值分析 

分 类 号：TK172[动力工程及工程热物理—热能工程]