Article(id=1222503108756886305, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222503107959968541, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202307387, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=1689004800000, revisedDateStr=2023-07-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1769397054137, onlineDateStr=2026-01-26, pubDate=1698163200000, pubDateStr=2023-10-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769397054137, onlineIssueDateStr=2026-01-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769397054137, creator=13701087609, updateTime=1769397054137, updator=13701087609, issue=Issue{id=1222503107959968541, tenantId=1146029695717560320, journalId=1210938733613449225, year='2023', volume='52', issue='10', pageStart='1', pageEnd='198', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769397053947, creator=13701087609, updateTime=1773966614026, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241669232136614309, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222503107959968541, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241669232136614310, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222503107959968541, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=138, endPage=143, ext={EN=ArticleExt(id=1222503109008544549, articleId=1222503108756886305, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Analyse on shafting vibration and operating state of sealing pad of Arabelle type nuclear power turbo generator, columnId=1211002409397129992, journalTitle=Thermal Power Generation, columnName=Power generation technology forum, runingTitle=null, highlight=null, articleAbstract=
Taking a million kilowatt nuclear power half speed steam turbine generator set as the research object, a dynamic model of spring foundation bearing rotor is established by using the rotor dynamics professional analysis software ARMD. The dynamic characteristics of the shafting are obtained through dynamic calculation and analysis. The accuracy of the calculation model is verified by the coincidence of the field measured critical speed of the shafting and the calculated value. On this basis, the vibration response caused by the thermal imbalance of the seal pad of the generator is calculated. It is found that the vibration changes are mainly concentrated at the rotor of the generator, and the thermal imbalance of the seal pad is only the direct influence factor of the vibration fluctuation of the shaft system, but not the root cause. At the same time, the oil film stress of the seal pad under different operating conditions is analyzed, and it is found that the axial inclination has the greatest impact on the stress of the seal pad. Therefore, the processing and installation process shall be ensured during the maintenance and adjustment of the unit to prevent the shaft system deflection during the operation of the seal pad.
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以某百万千瓦级核电半速汽轮发电机组为研究对象,采用转子动力学的专业分析软件ARMD,建立弹簧基础-轴承-转子的动力学模型,通过动力学计算获得轴系动力学特性,现场实测轴系临界转速与计算值吻合,验证了该计算模型的准确性。在此基础上计算了发电机密封瓦热不平衡导致的振动响应,发现其振动变化主要集中于发电机转子处,密封瓦动静摩擦仅是轴系振动波动问题的直接影响因素之一,而非根本原因。同时对不同运行状态下密封瓦油膜受力进行分析,发现轴向倾斜对密封瓦受力影响最大,因此机组在检修调整过程中应保证加工及安装工艺,严防密封瓦运行过程中出现轴向倾斜。
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张恒(1988),男,硕士,工程师,主要研究方向为旋转设备轴系振动故障诊断及处理,zhanghengj@tpri.com.cn。
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张恒(1988),男,硕士,工程师,主要研究方向为旋转设备轴系振动故障诊断及处理,zhanghengj@tpri.com.cn。
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Vibration response change of bearing 8 when elevation changes 1 mm, figureFileSmall=+izn9ESFkLsZD85781d0FQ==, figureFileBig=YjwED1iWbHAqbQOjqOQZVg==, tableContent=null), ArticleFig(id=1241694382701727992, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=图5, caption=
标高变化1 mm时8号轴瓦振动响应变化, figureFileSmall=+izn9ESFkLsZD85781d0FQ==, figureFileBig=YjwED1iWbHAqbQOjqOQZVg==, tableContent=null), ArticleFig(id=1241694382823362819, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Fig.6, caption=
Unbalance relation above critical speed, figureFileSmall=xOenA2aPKRMRCV8zBcuxgA==, figureFileBig=5JIx18huUscbG9XJH2p5cA==, tableContent=null), ArticleFig(id=1241694382919831815, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=图6, caption=
高于临界转速时不平衡量关系, figureFileSmall=xOenA2aPKRMRCV8zBcuxgA==, figureFileBig=5JIx18huUscbG9XJH2p5cA==, tableContent=null), ArticleFig(id=1241694382991134995, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Fig.7, caption=
Vibration response of seal pad under thermal unbalance, figureFileSmall=hcyBarltbR2KIWqmMabPTw==, figureFileBig=Pw54enZMGc3htnJVrwRWUQ==, tableContent=null), ArticleFig(id=1241694383083409687, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=图7, caption=
密封瓦处热不平衡时振动响应, figureFileSmall=hcyBarltbR2KIWqmMabPTw==, figureFileBig=Pw54enZMGc3htnJVrwRWUQ==, tableContent=null), ArticleFig(id=1241694383175684384, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Fig.8, caption=
Model of generator rotor and sealing pad, figureFileSmall=Gk5cesydbKCRG9ldf/s06g==, figureFileBig=RVbhwNsEDX5YkdV1777vyQ==, tableContent=null), ArticleFig(id=1241694383263764776, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=图8, caption=
发电机转子及密封瓦模型, figureFileSmall=Gk5cesydbKCRG9ldf/s06g==, figureFileBig=RVbhwNsEDX5YkdV1777vyQ==, tableContent=null), ArticleFig(id=1241694383368622386, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Fig.9, caption=
Deformation calculation of generator rotor and sealing pad, figureFileSmall=wtpTpIZaVm2qNsfsO9nf0A==, figureFileBig=CWhVeigIw3kCpMJ+M1UQiA==, tableContent=null), ArticleFig(id=1241694383469285690, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=图9, caption=
发电机转子及密封瓦变形计算, figureFileSmall=wtpTpIZaVm2qNsfsO9nf0A==, figureFileBig=CWhVeigIw3kCpMJ+M1UQiA==, tableContent=null), ArticleFig(id=1241694383561560388, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Fig.10, caption=
Stress diagram of sealing pad, figureFileSmall=1uUKqjTfXtxVQCQu7K+xxQ==, figureFileBig=Gyxu7YghYuYTk/82bYjJvw==, tableContent=null), ArticleFig(id=1241694383624474954, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=图10, caption=
密封瓦受力, figureFileSmall=1uUKqjTfXtxVQCQu7K+xxQ==, figureFileBig=Gyxu7YghYuYTk/82bYjJvw==, tableContent=null), ArticleFig(id=1241694383733526865, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Fig.11, caption=
Oil film pressure distribution of sealing pad, figureFileSmall=0VAdG6asqLv4eYe7PaeN2g==, figureFileBig=Xq3/pJx56B7WsaHlQeb9NA==, tableContent=null), ArticleFig(id=1241694383842578776, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=图11, caption=
密封瓦油膜压力分布变化, figureFileSmall=0VAdG6asqLv4eYe7PaeN2g==, figureFileBig=Xq3/pJx56B7WsaHlQeb9NA==, tableContent=null), ArticleFig(id=1241694383951630692, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Tab.1, caption=
Each rotor critical speed calculated values
, figureFileSmall=null, figureFileBig=null, tableContent=
| 阶次 | 高中压转子/(r·min–1) | 1号低压转子/(r·min–1) | 2号低压转子/(r·min–1) | 3号低压转子/(r·min–1) | 发电机转子/(r·min–1) |
|---|
| 一阶 | 943 | 1 098 | 1 092 | 1 053 | 874 |
| 二阶 | | | | | 2 812 |
), ArticleFig(id=1241694384048099689, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=表1, caption=
各转子临界转速计算值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 阶次 | 高中压转子/(r·min–1) | 1号低压转子/(r·min–1) | 2号低压转子/(r·min–1) | 3号低压转子/(r·min–1) | 发电机转子/(r·min–1) |
|---|
| 一阶 | 943 | 1 098 | 1 092 | 1 053 | 874 |
| 二阶 | | | | | 2 812 |
), ArticleFig(id=1241694384165540209, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Tab.2, caption=
Measured values of each rotor critical speed
, figureFileSmall=null, figureFileBig=null, tableContent=
| 阶次 | 高中压转子/(r·min–1) | 1号低压转子/(r·min–1) | 2号低压转子/(r·min–1) | 3号低压转子/(r·min–1) | 发电机转子/(r·min–1) |
|---|
| 一阶 | 900~1 000 | 1 000~1 200 | 1 000~1 200 | 1 000~1 200 | 800~1 050 |
| 二阶 | | | | | |
), ArticleFig(id=1241694384249426301, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=表2, caption=
各转子临界转速实测值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 阶次 | 高中压转子/(r·min–1) | 1号低压转子/(r·min–1) | 2号低压转子/(r·min–1) | 3号低压转子/(r·min–1) | 发电机转子/(r·min–1) |
|---|
| 一阶 | 900~1 000 | 1 000~1 200 | 1 000~1 200 | 1 000~1 200 | 800~1 050 |
| 二阶 | | | | | |
), ArticleFig(id=1241694385767764356, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Tab.3, caption=
Unbalanced mass distribution
, figureFileSmall=null, figureFileBig=null, tableContent=
| 位置 | 质量/(kg·mm) | 角度/(°) |
|---|
| 3号低压转子末级叶片(调端) | 200 | 0 |
| 3号低压转子次末级叶片(调端) | 200 | 100 |
| 3号低压转子中部 | 400 | 180 |
| 3号低压转子次末级叶片(电端) | 200 | 280 |
| 3号低压转子末级叶片(电端) | 200 | 0 |
| 发电机转子风扇环(调端) | 300 | 50 |
| 发电机转子中部 | 500 | 150 |
| 发电机转子风扇环(电端) | 300 | 230 |
), ArticleFig(id=1241694385860039048, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=表3, caption=
不平衡质量分布
, figureFileSmall=null, figureFileBig=null, tableContent=
| 位置 | 质量/(kg·mm) | 角度/(°) |
|---|
| 3号低压转子末级叶片(调端) | 200 | 0 |
| 3号低压转子次末级叶片(调端) | 200 | 100 |
| 3号低压转子中部 | 400 | 180 |
| 3号低压转子次末级叶片(电端) | 200 | 280 |
| 3号低压转子末级叶片(电端) | 200 | 0 |
| 发电机转子风扇环(调端) | 300 | 50 |
| 发电机转子中部 | 500 | 150 |
| 发电机转子风扇环(电端) | 300 | 230 |
), ArticleFig(id=1241694385952313746, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Tab.4, caption=
Changes of oil film parameters with the clearance of sealing pad
, figureFileSmall=null, figureFileBig=null, tableContent=
| 间隙变化量/mm | 偏心率 | 流量/(L·min–1) | 最小油膜厚度/µm | 最大油膜压力/MPa |
|---|
| 0 | 0.753 | 21.857 | 63.2 | 0.411 3 |
| 0.02 | 0.757 | 22.573 | 64.5 | 0.408 5 |
| 0.04 | 0.760 | 23.214 | 65.7 | 0.405 1 |
| 0.06 | 0.764 | 23.998 | 67.1 | 0.401 9 |
| 0.08 | 0.767 | 24.712 | 68.7 | 0.398 8 |
), ArticleFig(id=1241694386090725788, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=表4, caption=
间隙变化时密封瓦油膜参数变化
, figureFileSmall=null, figureFileBig=null, tableContent=
| 间隙变化量/mm | 偏心率 | 流量/(L·min–1) | 最小油膜厚度/µm | 最大油膜压力/MPa |
|---|
| 0 | 0.753 | 21.857 | 63.2 | 0.411 3 |
| 0.02 | 0.757 | 22.573 | 64.5 | 0.408 5 |
| 0.04 | 0.760 | 23.214 | 65.7 | 0.405 1 |
| 0.06 | 0.764 | 23.998 | 67.1 | 0.401 9 |
| 0.08 | 0.767 | 24.712 | 68.7 | 0.398 8 |
), ArticleFig(id=1241694386203972006, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=EN, label=Tab.5, caption=
Change of oil film parameters of seal pad when axial inclination
, figureFileSmall=null, figureFileBig=null, tableContent=
| 倾斜度/(mm·mm–1) | 偏心率 | 最小油膜厚度/µm | 最大油膜压力/MPa |
|---|
| 0 | 0.753 | 63.2 | 0.411 3 |
| 0.001 | 0.788 | 55.6 | 0.423 7 |
| 0.002 | 0.814 | 47.1 | 0.449 3 |
| 0.003 | 0.846 | 38.8 | 0.530 4 |
| 0.004 | 0.879 | 29.7 | 0.662 3 |
), ArticleFig(id=1241694386342384050, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503108756886305, language=CN, label=表5, caption=
轴向倾斜时密封瓦油膜参数变化
, figureFileSmall=null, figureFileBig=null, tableContent=
| 倾斜度/(mm·mm–1) | 偏心率 | 最小油膜厚度/µm | 最大油膜压力/MPa |
|---|
| 0 | 0.753 | 63.2 | 0.411 3 |
| 0.001 | 0.788 | 55.6 | 0.423 7 |
| 0.002 | 0.814 | 47.1 | 0.449 3 |
| 0.003 | 0.846 | 38.8 | 0.530 4 |
| 0.004 | 0.879 | 29.7 | 0.662 3 |
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