盾尾密封油脂的抗水压密封性能评价标准研究

朱炜健; 王德乾; 廖剑平; 王静; 谢宇飞; 斯芳芳

doi:10.3973/j.issn.2096-4498.2021.07.010

隧道建设 >

2021 , Vol. 41 >Issue 7: 1166 - 1171

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.07.010

研究与探索

盾尾密封油脂的抗水压密封性能评价标准研究

朱炜健 ,
王德乾 ,
廖剑平 ,
王静 ,
谢宇飞 ,
斯芳芳

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(1.中铁建华南建设（广州）高科技产业有限公司，广东广州 511458； 2.中铁第五勘察设计院集团有限公司，北京 102600)

朱炜健（1993—），男，广东广州人，2020年毕业于广东工业大学，材料工程专业，硕士，助理工程师，主要从事隧道与地下施工材料研发工作。E-mail： 865860861@qq.com。*通信作者：王德乾， E-mail： wangdeqian@t5y.cn。

网络出版日期: 2021-07-29

基金资助

中铁建华南建设有限公司科技计划基金（18-A-03）

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Evaluation Standards for Water Tightness of Shield Tail Sealing Grease under Conditions of High Water Pressure

ZHU Weijian ,
WANG Deqian ,
LIAO Jianping ,
WANG Jing ,
XIE Yufei ,
SI Fangfang

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(1. CRCC South Construction (Guangzhou) Hitech Industry, Guangzhou 511458, Guangdong, China; 2. China Railway Fifth Survey and Design Institute Group Co., Ltd., Beijing 102600, China)

Online published: 2021-07-29

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摘要

为解决目前国内外盾尾密封油脂抗水压密封测试标准不统一，不能定量测试油脂抗水压密封性等问题，研制出一种新型抗水压密封测试仪，并对国内外常见盾尾密封油脂进行抗水压密封性能测试。经分析，总结油脂抗水压密封机制，并定义水击穿压力测试指标，即实验室25 ℃下，使用1层网孔孔径为0.76 mm、丝径0.3 mm的金属钢丝网，300 g盾尾密封油脂被水击穿的最小压力。用水击穿压力可定量表征盾尾密封油脂抗水压密封性，进而提出抗水压密封测试标准。

关键词： 盾尾密封油脂; 抗水压密封测试仪; 抗水压密封性; 评价标准; 水击穿压力

本文引用格式

朱炜健 , 王德乾 , 廖剑平 , 王静 , 谢宇飞 , 斯芳芳 . 盾尾密封油脂的抗水压密封性能评价标准研究[J]. 隧道建设, 2021 , 41(7) : 1166 -1171 . DOI: 10.3973/j.issn.2096-4498.2021.07.010

Abstract

The test standards for the watertightness of shield tail sealing grease under high water pressure are not uniform around the world, and the performance of the sealing grease cannot be quantitatively tested. Therefore, in this study, a new method of testing the sealing performance of shield tail sealing grease under high water pressure is developed, and watertightness tests are conducted on commonly used types of shield tail sealing grease. Following an analysis, the sealing mechanism for sealing grease under highpressure conditions is summarized, and test standards for the water breakdown pressure are defined. The water breakdown pressure is the minimum water pressure that will puncture 300 g of shield tail sealing grease on a layer of metal wire mesh that has a mesh hole diameter of 0.76 mm and a steel wire diameter of 0.3 mm at 25 ℃. The water breakdown pressure can be used to quantitatively evaluate the sealing performance of shield tail sealing grease under water pressure. Finally, the test standards are proposed.

Key words： ; shield tail sealing grease; testing device for watertightness under high pressure; watertightness under high pressure; evaluation standards; water breakdown pressure

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