Article(id=1322276067184853541, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1322276007797702769, articleNumber=null, orderNo=null, doi=10.11868/j.issn.1001-4381.2025.000127, pmid=null, cstr=32421.14.j.issn.1001-4381.2025.000127, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1741017600000, receivedDateStr=2025-03-04, revisedDate=null, revisedDateStr=null, acceptedDate=1744560000000, acceptedDateStr=2025-04-14, onlineDate=1793184781117, onlineDateStr=2026-10-28, pubDate=1789833600000, pubDateStr=2026-09-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793184781117, onlineIssueDateStr=2026-10-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793184781117, creator=13701087609, updateTime=1793184781117, updator=13701087609, issue=Issue{id=1322276007797702769, tenantId=1146029695717560320, journalId=1220038251117760515, year='2026', volume='54', issue='9', pageStart='1', pageEnd='252', issueExtLink='null', onlineDate='null', pubDate='1789833600000', pubDateStr='2026-09-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=0, createTime=1793184766959, creator='13701087609', updateTime=1793185369041, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322278533200728093, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1322276007797702769, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322278533200728094, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1322276007797702769, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=226, endPage=234, ext={EN=ArticleExt(id=1322276067415540262, articleId=1322276067184853541, tenantId=1146029695717560320, journalId=1220038251117760515, language=EN, title=Elastic performance and air-tightness of U-shaped metal seals, columnId=1220689384450478826, journalTitle=Journal of Materials Engineering, columnName=RESEARCH ARTICLE, runingTitle=null, highlight=null, articleAbstract=
This study addresses the high-temperature sealing challenges in aero-engines by analyzing the effects of wall thickness, compression ratio, and cyclic compression cycles on the elastic performance of U-shaped metal seals. The optimal parameter combination is determined through systematic investigation. Additionally, a dedicated high-temperature gas tightness testing apparatus is developed to evaluate airtight performance, with a derived leakage rate calculation formula providing quantitative analysis. The results demonstrate that the elastic recovery rate decreases with increased wall thickness, higher compression ratios, or greater numbers of compression cycles. At 650 ℃, all three tested wall thicknesses maintain over 90% recovery rate after 50 compression cycles, with the 0.5 mm configuration showing superior elastic characteristics. Leakage rate exhibits negative correlation with temperature and contact stress, while displaying positive linear dependence on pressure differentials. Notably, the 0.5 mm seal achieves 50% lower leakage at 650 ℃ compared to room temperature. Enhanced wall thickness or compression ratio improves airtightness by elevating interfacial contact stress.
, authors=Yunjiao SUN
1, Difei WANG
1, Jingda LI
2, Chenxin JI
1, Jun LYU
2, Pengting LI
1, authorsList=Yunjiao SUN, Difei WANG, Jingda LI, Chenxin JI, Jun LYU, Pengting LI, authorCompany=null, correspAuthors=Pengting LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322276071253328445, articleId=1322276067184853541, tenantId=1146029695717560320, journalId=1220038251117760515, language=CN, title=U形金属密封件的弹性性能和气密性能, columnId=1220689384622445292, journalTitle=材料工程, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
针对航空发动机的高温密封问题,以U形金属密封件为研究对象,分析了密封件壁厚、压缩率及压缩循环次数对其弹性性能的影响,确定了最佳参数组合。同时,设计并搭建了高温气密性能检测装置,进行了密封件气密性能实验研究,给出了泄漏率计算公式,并分析了气密性能影响因素及其与密封件弹性性能的关系。结果表明,密封件回弹率随壁厚、压缩率的增大或压缩循环次数的增加而减小;3种壁厚的密封件在650 ℃温度下,50次压缩后回弹率均保持在90%以上,当壁厚为0.5 mm时密封件具有最佳的弹性性能。密封件的泄漏率随温度、接触应力的增加而减小,随压差的增大而线性增大;在650 ℃温度下,0.5 mm壁厚的密封件比室温条件下的泄漏率平均下降约50%。密封件的气密性能受其弹性性能的影响,增大壁厚或压缩率会增加密封表面接触应力,进而降低泄漏率。
, authors=孙赟娇
1, 王涤非
1, 李京达
2, 汲辰鑫
1, 吕军
2, 李鹏廷
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李鹏廷(1986—),男,副教授,博士,主要研究方向为载能束冶金及先进材料制备,联系地址:辽宁省大连市甘井子区大连理工大学新三束四号楼(116024),E-mail:
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U-shaped metallic sealing test specimens, figureFileSmall=Wleuqj8j9lPAx/EuEvoixg==, figureFileBig=5noavgkzt/IA0HzTmUQGaw==, tableContent=null), ArticleFig(id=1322276080363356780, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图1, caption=
U形金属密封件, figureFileSmall=Wleuqj8j9lPAx/EuEvoixg==, figureFileBig=5noavgkzt/IA0HzTmUQGaw==, tableContent=null), ArticleFig(id=1322276080665346669, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.2, caption=
Schematic diagram of U-shaped metal seals, figureFileSmall=kB4lay+7hu6sXVv5hbEb0g==, figureFileBig=9PTcnN7jbwEtf25iIFVdyQ==, tableContent=null), ArticleFig(id=1322276080778592878, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图2, caption=
U形金属密封件结构示意图, figureFileSmall=kB4lay+7hu6sXVv5hbEb0g==, figureFileBig=9PTcnN7jbwEtf25iIFVdyQ==, tableContent=null), ArticleFig(id=1322276080917004911, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.3, caption=
Schematic diagram of airtight test equipment(a)test system;(b)test fixture model;(c)physical test fixture
, figureFileSmall=ZBcIEVQ2bjn/mGskvuGzMw==, figureFileBig=afopKk64W2YB8DIl4XAyUQ==, tableContent=null), ArticleFig(id=1322276081017668208, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图3, caption=
气密性实验装置示意图(a)测试系统;(b)实验工装模型;(c)实验工装实物
, figureFileSmall=ZBcIEVQ2bjn/mGskvuGzMw==, figureFileBig=afopKk64W2YB8DIl4XAyUQ==, tableContent=null), ArticleFig(id=1322276081076388465, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.4, caption=
Elastic performance test results of seals with different wall thicknesses and compression ratios(a)compression ratio-linear load curve;(b)compression ratio-recovery rate curve, figureFileSmall=cYa+ItiSt8nvG9uwtRjgow==, figureFileBig=wpn6BXQIVP0kqKXXk+gc0w==, tableContent=null), ArticleFig(id=1322276081135108722, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图4, caption=
不同壁厚及压缩率条件下密封件的弹性性能测试结果图(a)压缩率-线载荷曲线;(b)压缩率-回弹率曲线
, figureFileSmall=cYa+ItiSt8nvG9uwtRjgow==, figureFileBig=wpn6BXQIVP0kqKXXk+gc0w==, tableContent=null), ArticleFig(id=1322276081218994803, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.5, caption=
Elastic performance test results of seals with different cycles(a)cycles-linear load curve;(b)cycles-recovery rate curve, figureFileSmall=KVSr5RUDxS9kTRTPdJh3DQ==, figureFileBig=ULtS/PKLbfmn0KWFnSo+Fw==, tableContent=null), ArticleFig(id=1322276081298686580, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图5, caption=
不同循环次数条件下密封件的弹性性能测试结果(a)循环次数-线载荷曲线;(b)循环次数-回弹率曲线, figureFileSmall=KVSr5RUDxS9kTRTPdJh3DQ==, figureFileBig=ULtS/PKLbfmn0KWFnSo+Fw==, tableContent=null), ArticleFig(id=1322276081407738485, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.6, caption=
Variation of seal leakage rate with pressure difference at different temperatures, figureFileSmall=k9LFlQzS6Zmq7csI6Ihh5A==, figureFileBig=+vxEoPXwX4R2rDjSqBENmg==, tableContent=null), ArticleFig(id=1322276081470653047, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图6, caption=
不同温度下密封件泄漏率随压差的变化规律, figureFileSmall=k9LFlQzS6Zmq7csI6Ihh5A==, figureFileBig=+vxEoPXwX4R2rDjSqBENmg==, tableContent=null), ArticleFig(id=1322276081550344824, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.7, caption=
Schematic diagram of the parallel-plate model, figureFileSmall=cyj3XKzBSHMczewa74mfIA==, figureFileBig=fzcMjFQJJLAYpXw7IAJISg==, tableContent=null), ArticleFig(id=1322276081617453689, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图7, caption=
平行平板模型示意图, figureFileSmall=cyj3XKzBSHMczewa74mfIA==, figureFileBig=fzcMjFQJJLAYpXw7IAJISg==, tableContent=null), ArticleFig(id=1322276081688756858, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.8, caption=
Validation of leakage rate calculation formula, figureFileSmall=yc3PvjNuovg8Cm5XdbzzPA==, figureFileBig=ayCvncFfS9w2on1Qj3NNBw==, tableContent=null), ArticleFig(id=1322276081860723323, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图8, caption=
泄漏率计算公式准确性验证, figureFileSmall=yc3PvjNuovg8Cm5XdbzzPA==, figureFileBig=ayCvncFfS9w2on1Qj3NNBw==, tableContent=null), ArticleFig(id=1322276083400032894, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.9, caption=
Variation of sealing component leakage rate and sealing gap height with contact stress(a)contact stress-leakage rate curve;(b)contact stress-sealing gap height curve, figureFileSmall=Mm0QAKxqJqfqw9grCF63sA==, figureFileBig=ZN04cnFf6J0YPsDxsLmfcQ==, tableContent=null), ArticleFig(id=1322276083483918975, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图9, caption=
密封件泄漏率及密封间隙高度随接触应力变化规律(a)接触应力-泄漏率曲线;(b)接触应力-密封间隙高度曲线, figureFileSmall=Mm0QAKxqJqfqw9grCF63sA==, figureFileBig=ZN04cnFf6J0YPsDxsLmfcQ==, tableContent=null), ArticleFig(id=1322276083551027840, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.10, caption=
Variation of sealing leakage rate with wall thickness and compression ratio(a)wall thickness-leakage rate curve;(b)compression ratio-leakage rate curve, figureFileSmall=+rqyR0mv1hMkLk0u+yLB+Q==, figureFileBig=VUGnq5ZyfHy0HESm1gfl5w==, tableContent=null), ArticleFig(id=1322276083618136705, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图10, caption=
密封件泄漏率随壁厚及压缩率变化规律(a)壁厚-泄漏率曲线;(b)压缩率-泄漏率曲线, figureFileSmall=+rqyR0mv1hMkLk0u+yLB+Q==, figureFileBig=VUGnq5ZyfHy0HESm1gfl5w==, tableContent=null), ArticleFig(id=1322276083689439874, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=EN, label=Fig.11, caption=
Variation of seal leakage rate with pressure difference, figureFileSmall=LO+BWPSBxUlij0R/mWFAFw==, figureFileBig=D2aXNPdGn52/zazso84dJg==, tableContent=null), ArticleFig(id=1322276083781714563, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322276067184853541, language=CN, label=图11, caption=
密封件泄漏率随压差的变化规律, figureFileSmall=LO+BWPSBxUlij0R/mWFAFw==, figureFileBig=D2aXNPdGn52/zazso84dJg==, tableContent=null)], attaches=null, journal=Journal(id=1220037122615103490, delFlag=0, nameCn=材料工程, nameEn=Journal of Materials Engineering, nameHistory1=null, nameHistory2=null, issn=1001-4381, eissn=, cn=11-1800/TB, coden=null, periodic=0, language=CN, oaType=null, ccby=null, superviseOffice=null, ownerOffice=null, pubOffice=null, editorOffice=null, officeType=null, aims=null, clcCode=null, officeProv=null, officeCity=null, officeAddr=null, officeZip=null, officeEmail=null, officePhone=null, editDirector=null, officeDirector=null, officeDirectorPhone=null, officeStaffNum=null, officeEmpNum=null, coverPicUrl=qS5NycccBtA0aS0XG68cYQ==, journalPrice=null, startedYear=null, abbrevIsoEn=Journal of Materials Engineering, journalRemark=null, publicationField=null, createdTime=1768809117229, updatedTime=1784018147184, createdBy=18614031015, updatedBy=13041195026, firstLetterCn=C, firstLetterEn=C, 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