Analysis on performance and test of a new type of ultra-high pressure pipe joint  

作　　者：Zhai Fugang Kong Xiangdong Sun Yugang Wang Zhong Hao Xiaobei 翟富刚;Kong Xiangdong;Sun Yugang;Wang Zitong;Hao Xiaobei(College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, P. R. China;Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University), Ministry of Education of China, Qinhuangdao 066004, P. R. China;Huaye Power Technology Co. , Foshan 528300, P. R. China)

机构地区：[1]College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, P. R. Chin [2]Key Laboratory of Advanced Forging ＆ Stamping Technology and Science （Yanshan University）, Ministry of Education of China, Qinhuangdao 066004, P. R. Chin [3]Huaye Power Technology Co. , Foshan 528300, P. R. China

出　　处：《High Technology Letters》2018年第2期203-207,共5页高技术通讯（英文版）

基　　金：Supported by the 2015 Industrial Transformation and Upgrading of Strong Base Project(TC150B5C0-29);the National Key Basic Research Program of China(2014CB046400)

摘　　要：Analysis as well as application of ultra-high pressure hydraulic system and elements has become a trend. The structure and operation principle of a new type of ultra-high pressure pipe joint is introduced. The structure of the new type of ultra-high pressure pipe joint is simple and is easy to be produced. The finite element model on two working conditions( preload condition with 30 N·m torque and static-loading condition with 70 MPa pressure) is built and computed. The width of contact area,the equivalent stress status,as well as the contact pressure status are plotted and analyzed. According to the national standard,test on air-tightness,blasting,and cyclic endurance is conducted and the results show that the new type of ultra-high pressure pipe joint has the sealability for ultra-high pressure up to 70 MPa,and the DN6 ultra-high pressure pipe joint can provide effective seal under70 MPa fluid pressure. The research can provide a thinking and method on designing ultra-high pressure pipe joint and push forward the development of ultra-high pressure hydraulic system.Analysis as well as application of ultra-high pressure hydraulic system and elements has become a trend. The structure and operation principle of a new type of ultra-high pressure pipe joint is intro- duced. The structure of the new type of ultra-high pressure pipe joint is simple and is easy to be pro- duced. The finite element model on two working conditions （preload condition with 30N · m torque and static-loading condition with 70MPa pressure） is built and computed. The width of contact area, the equivalent stress status, as well as the contact pressure status are plotted and analyzed. Accord- ing to the national standard, test on air-tightness, blasting, and cyclic endurance is conducted and the results show that the new type of ultra-high pressure pipe joint has the sealability for ultra-high pressure up to 70MPa, and the DN6 ultra-high pressure pipe joint can provide effective seal under 70MPa fluid pressure. The research can provide a thinking and method on designing ultra-high pres- sure pipe joint and push forward the development of ultra-high pressure hydraulic system.

关 键 词：pipe joint ultra-high pressure sealing performance hydraulic system 

分 类 号：TH137[机械工程—机械制造及自动化]