|本期目录/Table of Contents|

[1]戴文超,郑小涛*,文 翔,等.高温振动下聚四氟乙烯垫片的松弛与泄漏测试[J].武汉工程大学学报,2017,39(05):503-507.[doi:10. 3969/j. issn. 1674?2869. 2017. 05. 017]
 DAI Wenchao,ZHENG Xiaotao*,WEN Xiang,et al.Relaxation and Leakage Test of PTFE Gasket under High Temperature Vibration[J].Journal of Wuhan Institute of Technology,2017,39(05):503-507.[doi:10. 3969/j. issn. 1674?2869. 2017. 05. 017]
点击复制

高温振动下聚四氟乙烯垫片的松弛与泄漏测试(/HTML)
分享到:

《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
39
期数:
2017年05期
页码:
503-507
栏目:
机电与信息工程
出版日期:
2017-12-19

文章信息/Info

Title:
Relaxation and Leakage Test of PTFE Gasket under High Temperature Vibration
文章编号:
20170517
作者:
戴文超郑小涛*文 翔喻九阳徐建民
化工装备强化与本质安全湖北省重点实验室(武汉工程大学),湖北 武汉 430205
Author(s):
DAI WenchaoZHENG Xiaotao*WEN XiangYU JiuyangXU Jianming
Hubei Key Laboratory of Chemical Equipment Intensification and Intrinsic Safety(Wuhan Institute of technology),Wuhan 430205,China
关键词:
聚四氟乙烯垫片密封性能高温小幅振动
Keywords:
polytetrafluoroethylene gaskets sealing performance high temperature small-amplitude vibration
分类号:
TQ 050.4+3
DOI:
10. 3969/j. issn. 1674?2869. 2017. 05. 017
文献标志码:
A
摘要:
设计了一种高温下垫片密封性能的测试系统,研究了在100 ℃时小幅位移控制振动及静态松弛条件下聚四氟乙烯垫片的应力松弛和密封性能,并讨论了载荷比为0.99时3种最大压缩量对聚四氟乙烯垫片的动态应力松弛和泄漏行为的影响,以及在同上最大压缩量下的静态应力松弛和密封性能. 结果表明,100 ℃下聚四氟乙烯垫片的动态应力松弛率随最大压缩量增大而增大,静态应力松弛率随最大压缩量增大有缓慢减小;在静态和动态试验的初始20 s阶段内,应力迅速下降,表现明显的应力松弛,而动态试验更明显;动态松弛实验前后的压差变化约是静态松弛试验的1.1倍.
Abstract:
The testing system of sealing performance for high-temperature gasket was designed. The stress relaxation and sealing performance of polytetrafluoroethylene (PTFE) gasket under small-amplitude deformation-controlled vibration and static stress relaxation at 100 ℃ were investigated. The effects of maximum compression on the dynamic stress relaxation and leakage behavior of PTFE were studied. The static stress relaxation and sealing performance of PTFE gasket at load ratio of 0.99 and the maximum compression of 0.3 mm, 0.4 mm and 0.5 mm were further researched. Results show that the dynamic stress relaxation rate of PTFE increases with the maximum compression rising and the static stress relaxation rate of PTFE reduces slowly with the increase of the maximum compression deformation at 100 ℃. Moreover, the stress decreases rapidly during the initial 20 s in both dynamic and static tests, which shows a remarkable effect of the stress relaxation, especially in the dynamic stress relaxation experiment. The differential pressure of dynamic test is about 1.1 times that of static test.

参考文献/References:

[1] 王明伟,王春燕,杨继新,等. BT20钛合金高温应力松弛行为研究[J]. 稀有金属材料与工程,2012,41(3):502-505. WANG M W,WANG C Y,YANG J X,et al. Study of high temperature stress relaxation behavior of BT20 alloy[J]. Rare Metal Materials and Engineering,2012,41(3):502-505. [2] 桑聪,郑小涛,文翔,等. 疲劳载荷下高温柔性石墨金属波齿复合垫片的实验研究[J]. 武汉工程大学学报,2016,38(1):78-81. SANG C,ZHENG X T,WEN X,et al. Creep fluctuation behavior of high temperature flexible graphite corrugated metal gaskets under fatigue loading[J]. Journal of Wuhan Tnstitute of Technology,2016,38(1):78-81. [3] 郑小涛,陈瑶,喻九阳,等. 螺栓法兰连接系统的热应力场[J]. 武汉工程大学学报,2014,36(6):37-40. ZHENG X T,CHEN Y,YU J Y,et al. Thermal stress of bolted flanged system[J]. Journal of Wuhan Institute of Technology,2014,36(6):37-40. [4] BOUZID A, NECHACHE A. An analytito cal solution for evaluating gasket stress change in bolted flange connections subjected high temperature loading[J]. Journal of Pressure Vessel Technology 2005,127(4): 414-427. [5] BOUZID A, NECHACHE A. Thermally induced deflection in bolted flanged connections [J]. ASME Journal of Pressure Vessel Technology, 2005,127(4): 394-401. [6] BOUZID A, CHAABAN A. An accurate method for evaluating relaxation in bolted flanged connections[J].Journal of Pressure Vessel Technology,1997,119(4):10-17. [7] NECHACHE A, BOUZID A H. On the use of plate theory to evaluate the load relaxation in bolted flanged joints subjected to creep[J]. International Journal of Pressure Vessel and Piping,2008,85(7):486-497. [8] ALKELANI AA, HOUSARI BA, NASSAR SA. A proposed model for predicting clamp load loss due to gasket creep relaxation in bolted joints[J]. ASME Journal of Pressure Vessel Technology,2012, 134(2):517-522. [9] 许珊珊,张营营,张其林. PTFE膜材的应力松弛性能及预测模型分析[J]. 应用数学和力学, 2016,37(3):266-276. XU S S,ZHANG Y Y,ZHANG Q L. Stress relaxation properties and the prediction models for PTFE membranes[J]. Applied Mathematics and Mechanics.2016,37(3):266-276. [10] 张红才,郑小涛,轩福贞,等. 蠕变-疲劳载荷下25Cr2MoVA钢的循环应力松弛行为[J]. 压力容器,2014,31(9):23-27. ZHANG H C,ZHENG X T,XUAN F Z,et al. Cyclic stress relaxation behavior of 25Cr2MoVA steel under creep-fatigue loadings[J]. Pressure Vessel Technology,2014,31(9):23-27. [11] 喻九阳,王明伍,张红才,等. 25Cr2MoVA和15CrMo钢的高温蠕变特性[J]. 武汉工程大学学报,2014,36(5):48-52. YU J Y,WANG M W,ZHANG H C,et al. Creep behavior of 25Cr2MoVA steel and 15CrMo steel[J]. Journal of Wuhan Institute of Technology,2014,36(5):48-52. [12] 中国国家标准化管理委员会. GB/T 12621-2008管法兰用垫片应力松弛试验方法[S]. 北京:中国标准出版社,2008. [13] 郑小涛,文翔,桑聪,等. 高温波齿复合垫片的循环压缩回弹性能[J]. 武汉工程大学学报,2016,38(4):382-384. ZHENG X T,WEN X,SANG C,et al. Cyclic compression-resilience of flexible graphite corrugated metal gaskets at elevated temperature[J]. Journal of Wuhan Institute of Technology,2016,38(4):382-384. [14] 罗文波,杨挺青. 固态高聚物的应力松弛行为[J]. 高分子材料科学与工程,2002,18(2):100-101. LUO W B,YANG T Q. Stress relaxation behavior of solid polymers[J]. Polymer Materials Science and Engineering,2002,18(2):100-101. [15] 陈艳,陈宏善,康永刚. 分数Maxwell模型应用于PTFE松弛模量的研究[J]. 高等学校化学学报,2006,27(11):2160-2163. CHEN Y,CHEN H S,KANG Y G. Relaxation modulus of PTFE studied by fractional maxwell model[J]. Chemical Journal of Chinese University,2006,27(11):2160-2163.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期:2017-04-15 基金项目:湖北省教育厅科学研究计划重点项目(D20161508) 作者简介:戴文超,硕士研究生. E-mail:437870333@qq.com
更新日期/Last Update: 2017-10-26