摘要
介绍核电站空气闸门用高性能橡胶中空充气密封条的研制情况。根据该密封条的结构特点和综合使用性能要求,橡胶材料选用三元乙丙橡胶(EPDM),骨架材料选用锦纶纤维,粘合剂选用开姆洛克238。采用EPDM混炼胶、汽油和粘合剂组成的胶浆对骨架材料表面进行预处理,以提高胶料与骨架材料的粘合性能。密封条模具设计为五段分体的组合模具,并采用数控加工中心进行精准加工。对研制的密封条进行外观、充气压力、密封条本体、热老化、充泄压循环、辐照、冷却剂丧失、主蒸汽管道破裂、极限密封、1∶1泄漏率和破坏性试验,均达到合格要求,综合使用性能完全达到了设计要求。该密封条具有良好的耐热性、耐机械疲劳性、耐辐照、耐压强性,对核电站空气闸门系统有较好的密封性能,同时还具有补偿空气闸门系统剪切变形及线性位移等优异性能。这类新型结构密封条也可应用在航天、航空、医疗和化工等领域。
The development of high-performance inflatable rubber sealing strip for the air gate of nuclear power plant was introduced.According to the structural features and comprehensive performance requirements of the sealing strip,ethylene propylene diene monomer(EPDM)was selected as the rubber material with nylon fiber as the skeleton material and Chemlock 238 as the adhesive.The surface of the framework material was pretreated with the slurry composed of EPDM compound,gasoline and adhesive to improve the adhesion between the rubber and the framework material.The sealing strip mold was designed as a five segment mold,and was precisely processed by a CNC machining center.The appearance,inflation pressure,sealing strip body,thermal aging,pressure charging and relieving cycle,irradiation,LOCA,MSLB,limit seal,1∶1 leakage rate and destructive tests of the developed sealing strips met the product requirements,and the comprehensive service performance fully met the design requirements.This sealing strip had good heat resistance,mechanical fatigue resistance,radiation resistance and strong pressure resistance with good sealing performance for the air gate system of nuclear power plant.At the same time,it also had excellent performance to compensate the shear deformation and linear displacement of the air gate system.This kind of new structural sealing strip could also be used in the fields of aerospace,aviation,medical and chemical industry.
作者
尉言辉
金学铭
王崇
李冬
周洋
徐继亮
WEI Yanhui;JIN Xueming;WANG Chong;LI Dong;ZHOU Yang;XU Jiliang(CNNP Nuclear Power Operations Management Co.,Ltd,Jiaxing 314300,China;Shenyang Rubber Research&Design Institute Co.,Ltd,Shenyang 110021,China)
出处
《橡胶科技》
2023年第1期30-34,共5页
Rubber Science and Technology
