拧紧力矩对铜垫硬密封结构漏率的影响研究  

Effect of tightening torque on sealing structural leakage rate of copper backing

作　　者：杨旋 陈汉雷 张元 揭秉天 罗江[1] 焦飞飞 YANG Xuan;CHEN Hanlei;ZHANG Yuan;JIE Bingtian;LUO Jiang;JIAO Feifei(China Astronaut Research and Training Center,Beijing 100094,China)

机构地区：[1]中国航天员科研训练中心,北京100094

出　　处：《兵器装备工程学报》2025年第1期191-196,共6页Journal of Ordnance Equipment Engineering

摘　　要：针对铜垫硬密封结构在安装时的拧紧力矩选取需求,基于理论分析计算结果,开展不同力矩下的密封性能研究,并对分析结果进行验证试验。结果表明:欠力矩状态下的压紧力容易导致铜垫变形程度较弱,而过力矩状态下的压紧力则容易导致铜垫破损,并使其内芯产生塑性变形的趋势;密封结构安装时的实际施加力矩应选取力矩上限值的90%~95%,此时铜垫的变形程度能够促进其与密封面之间的配合,并保证较低的漏率值。研究可为金属硬密封结构的应用提供理论和试验依据,进一步提高高压类产品的使用稳定性和可靠性。Based on theoretical analysis,the sealing performance under different tightening torques was studied for the optimization design of copper backing sealing structure.The experiments results show that the compaction force under low-torque condition tends to produce weak deformation of copper backing,while that under excess-torque condition tends to generate inner plastic deformation with damage.The actual applied tightening torque during the assembly of the sealing structure should be 90%to 95%of the upper limit value.At this point,the deformation degree of copper backing can promote cooperation between sealing surfaces and ensure low leakage rate.This paper may provide theoretical and experimental basis for the application of metal rigidity sealing structures,further improving the stability and reliability of high-pressure products.

关 键 词：铜垫硬密封 拧紧力矩 密封性能 压紧力 

分 类 号：TB42[一般工业技术]