Article(id=1320037809721823468, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037738695475401, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2026.05.003, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1754928000000, receivedDateStr=2025-08-12, revisedDate=1773676800000, revisedDateStr=2026-03-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1792651138954, onlineDateStr=2026-10-22, pubDate=1780070400000, pubDateStr=2026-05-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792651138954, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792651138954, creator=13701087609, updateTime=1792651138954, updator=13701087609, issue=Issue{id=1320037738695475401, tenantId=1146029695717560320, journalId=1316781260334530699, year='2026', volume='54', issue='5', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='1780070400000', pubDateStr='2026-05-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792651122020, creator='13701087609', updateTime=1792656245721, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1320059229113795207, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037738695475401, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1320059229113795208, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037738695475401, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=18, endPage=26, ext={EN=ArticleExt(id=1320037810153836781, articleId=1320037809721823468, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=Experimental study on startup strategy of centrifugal pump system, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=

To investigate the hydraulic characteristics of centrifugal pumps during rapid transient processes and optimize their startup strategies,transient tests under various startup conditions were carried out on a marine centrifugal pump with a specific speed of 102.Based on a transient hydraulic performance test platform with a synchronous data acquisition system,the effects of five rotational speed variation curves and four startup times on the transient characteristics of pump startup were compared and analyzed under the conditions of rated speed of 1 450 r/min and design flow rate of 25 m3/h.The results show that under a fixed startup mode,the impact head decreases with increasing startup time.The startup acceleration has a significant effect on the impact head.Under the same startup time,the exponential startup curve produces the smallest impact head due to its lower acceleration in the final stage,with corresponding values of 6.923,6.872,6.865 and 6.836 m for the four startup times.The head overshoot rate is proposed as an indicator for evaluating the transient response of centrifugal pumps during startup.This parameter gradually decreases with time,and its variation trend exhibits an obvious concave curve characteristic.The head overshoot rate for the exponential startup mode is always the lowest,with values of 1.011 8,1.004 7,1.002 7,and 1.001 3,respectively.The exponential startup mode can effectively suppress head impact and is an ideal startup scheme for centrifugal pumps.This study can provide experimental basis and reference for the evaluation of startup status and optimization of operating performance of centrifugal pumps.

, authors=Chaolin WANG1, 2, Haoyu WANG1, 2, Jiyun DU1, 2, authorsList=Chaolin WANG, Haoyu WANG, Jiyun DU, authorCompany=null, correspAuthors=Jiyun DU, 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=1320037814566244609, articleId=1320037809721823468, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=离心泵系统启动策略的试验研究, columnId=1317484286475883136, journalTitle=流体机械, columnName=试验研究, runingTitle=null, highlight=null, articleAbstract=

为研究离心泵在快速瞬变过程中的水力特性并优化其启动策略,以一台比转速为102的船用离心泵为研究对象,开展了多种启动工况下的瞬态试验。基于搭建的同步数据采集系统瞬态水力性能测试平台,在额定转速1 450 r/min和设计流量25 m³/h的条件下,对比分析了5种转速变化曲线与4组启动时间对泵启动瞬态特性的影响。结果表明,在固定启动模式下,冲击扬程随启动时间延长而递减;启动加速度对冲击扬程具有显著影响,在相同启动时间下,指数型启动曲线因末期加速度较低,其冲击扬程最小,4种启动时间对应的值分别为6.923,6.872,6.865,6.836 m。提出扬程过冲率作为评价离心泵启动过程瞬态响应的指标,该参数随时间逐步减小,且变化趋势呈现明显的凹曲线特征,指数型启动模式对应的扬程过冲率始终最低,分别为1.011 8,1.004 7,1.002 7,1.001 3;指数型启动模式可有效抑制扬程冲击,是离心泵较为理想的启动方案。研究可为离心泵启动状态的评估与运行性能优化提供试验依据与参考。

, authors=王超林1, 2, 王浩宇1, 2, 杜继芸1, 2, authorsList=王超林, 王浩宇, 杜继芸, authorCompany=null, correspAuthors=杜继芸, authorNote=

王超林(2001),男,硕士,主要从事离心泵系统瞬态过程研究工作,E-mail:。

, correspAuthorsNote=
杜继芸(1991),男,博士,副教授,主要从事管道式水轮机设计优化研究工作,通信地址:214122江苏省无锡市滨湖区蠡湖大道1800号江南大学机械工程学院,E-mail:。
, copyrightStatement=作者向本刊所投稿件一经本刊录用,则该论文的复制权、发行权、信息网络传播权、翻译权、汇编权等权利视为自动转让给本刊。本刊为国内各主要数据库收录期刊,本刊所发表的稿件将同时通过互联网进行网络出版或提供信息服务。, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=6qbKiGRxu/bVArU16c10vQ==, magXml=KU2sK22aC9HGcYX/3pZILA==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=H1RhAkHRbLKXxtlrNOFAIg==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=iR1057PbQT+7JmHw75ey/Q==, mapNumber=null, fund=null)}, authors=[Author(id=1320037816617259273, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=w13969591413@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1320037816696951052, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, authorId=1320037816617259273, language=EN, stringName=Chaolin WANG, firstName=Chaolin, middleName=null, lastName=WANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, 2, address=1School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China
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王超林(2001),男,硕士,主要从事离心泵系统瞬态过程研究工作,E-mail:。

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王超林(2001),男,硕士,主要从事离心泵系统瞬态过程研究工作,E-mail:。

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articleId=1320037809721823468, language=CN, label=图1, caption=水力性能试验台

1-伺服电机;2-转矩转速传感器;3-油箱;4-出口高频动态压力传感器;5-蜗壳和叶轮;6-进口高频动态压力传感器;7-电磁流量计;8-电动球阀;9-储水罐。

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tableContent=null), ArticleFig(id=1320037821134524726, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, language=EN, label=Tab.1, caption=

Main parameters of the pump

, figureFileSmall=null, figureFileBig=null, tableContent=
参数数值
比转速ns102
额定转速n/(r⋅min-1)1 450
设计流量Qd/(m3⋅h-1)25
叶片数Z7
设计扬程H/m7
叶轮进口直径D1/mm50
叶轮出口直径D2/mm160
叶轮进口宽度d2/mm11
), ArticleFig(id=1320037821235188023, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, language=CN, label=表1, caption=

泵主要参数

, figureFileSmall=null, figureFileBig=null, tableContent=
参数数值
比转速ns102
额定转速n/(r⋅min-1)1 450
设计流量Qd/(m3⋅h-1)25
叶片数Z7
设计扬程H/m7
叶轮进口直径D1/mm50
叶轮出口直径D2/mm160
叶轮进口宽度d2/mm11
), ArticleFig(id=1320037821323268408, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, language=EN, label=Tab.2, caption=

Speed function for each startup scheme

, figureFileSmall=null, figureFileBig=null, tableContent=
启动方案速度函数(0<t≤T)
a n=ndt/T
b n=0.5ndt/0.25T,0≤t≤0.25T0.5nd1+t-0.25T0.75T,0.25T<t≤T
c n=0.5ndt/0.75T,0≤t≤0.75T0.5nd1+t-0.75T0.25T,0.75T<t≤T
d n=nd(1-et/m)
e n=nd 1+e-r(t-k)
), ArticleFig(id=1320037821394571577, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, language=CN, label=表2, caption=

每种启动方案的速度函数

, figureFileSmall=null, figureFileBig=null, tableContent=
启动方案速度函数(0<t≤T)
a n=ndt/T
b n=0.5ndt/0.25T,0≤t≤0.25T0.5nd1+t-0.25T0.75T,0.25T<t≤T
c n=0.5ndt/0.75T,0≤t≤0.75T0.5nd1+t-0.75T0.25T,0.75T<t≤T
d n=nd(1-et/m)
e n=nd 1+e-r(t-k)
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离心泵系统启动策略的试验研究
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王超林 1, 2 , 王浩宇 1, 2 , 杜继芸 1, 2
流体机械 | 试验研究 2026,54(5): 18-26
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流体机械 |试验研究 2026 , 54 (5) : 18 -26
离心泵系统启动策略的试验研究
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[Author(id=1320037816617259273, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=w13969591413@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1320037816696951052, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, authorId=1320037816617259273, language=EN, stringName=Chaolin WANG, firstName=Chaolin, middleName=null, lastName=WANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, 2, address=1School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China
2Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology,Jiangnan University,Wuxi 214122,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1320037816768254221, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037809721823468, authorId=1320037816617259273, language=CN, stringName=王超林, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, 2, address=1江南大学 机械工程学院,江苏 无锡 214122
2江南大学 江苏省食品先进制造装备技术重点实验室,江苏 无锡 214122, bio={"content":"

王超林(2001),男,硕士,主要从事离心泵系统瞬态过程研究工作,E-mail:。

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王超林(2001),男,硕士,主要从事离心泵系统瞬态过程研究工作,E-mail:。

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王超林1, 2 , 王浩宇1, 2, 杜继芸1, 2
作者信息
  • 1江南大学 机械工程学院,江苏 无锡 214122
  • 2江南大学 江苏省食品先进制造装备技术重点实验室,江苏 无锡 214122
通讯作者:
杜继芸(1991),男,博士,副教授,主要从事管道式水轮机设计优化研究工作,通信地址:214122江苏省无锡市滨湖区蠡湖大道1800号江南大学机械工程学院,E-mail:。
作者简介:

王超林(2001),男,硕士,主要从事离心泵系统瞬态过程研究工作,E-mail:。

Experimental study on startup strategy of centrifugal pump system
Chaolin WANG1, 2 , Haoyu WANG1, 2, Jiyun DU1, 2
Affiliations
  • 1School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China
  • 2Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology,Jiangnan University,Wuxi 214122,China
出版时间: 2026-05-30 doi: 10.3969/j.issn.1005-0329.2026.05.003
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为研究离心泵在快速瞬变过程中的水力特性并优化其启动策略,以一台比转速为102的船用离心泵为研究对象,开展了多种启动工况下的瞬态试验。基于搭建的同步数据采集系统瞬态水力性能测试平台,在额定转速1 450 r/min和设计流量25 m³/h的条件下,对比分析了5种转速变化曲线与4组启动时间对泵启动瞬态特性的影响。结果表明,在固定启动模式下,冲击扬程随启动时间延长而递减;启动加速度对冲击扬程具有显著影响,在相同启动时间下,指数型启动曲线因末期加速度较低,其冲击扬程最小,4种启动时间对应的值分别为6.923,6.872,6.865,6.836 m。提出扬程过冲率作为评价离心泵启动过程瞬态响应的指标,该参数随时间逐步减小,且变化趋势呈现明显的凹曲线特征,指数型启动模式对应的扬程过冲率始终最低,分别为1.011 8,1.004 7,1.002 7,1.001 3;指数型启动模式可有效抑制扬程冲击,是离心泵较为理想的启动方案。研究可为离心泵启动状态的评估与运行性能优化提供试验依据与参考。

离心泵  /  启动过程  /  冲击扬程  /  瞬态状况  /  扬程过冲率

To investigate the hydraulic characteristics of centrifugal pumps during rapid transient processes and optimize their startup strategies,transient tests under various startup conditions were carried out on a marine centrifugal pump with a specific speed of 102.Based on a transient hydraulic performance test platform with a synchronous data acquisition system,the effects of five rotational speed variation curves and four startup times on the transient characteristics of pump startup were compared and analyzed under the conditions of rated speed of 1 450 r/min and design flow rate of 25 m3/h.The results show that under a fixed startup mode,the impact head decreases with increasing startup time.The startup acceleration has a significant effect on the impact head.Under the same startup time,the exponential startup curve produces the smallest impact head due to its lower acceleration in the final stage,with corresponding values of 6.923,6.872,6.865 and 6.836 m for the four startup times.The head overshoot rate is proposed as an indicator for evaluating the transient response of centrifugal pumps during startup.This parameter gradually decreases with time,and its variation trend exhibits an obvious concave curve characteristic.The head overshoot rate for the exponential startup mode is always the lowest,with values of 1.011 8,1.004 7,1.002 7,and 1.001 3,respectively.The exponential startup mode can effectively suppress head impact and is an ideal startup scheme for centrifugal pumps.This study can provide experimental basis and reference for the evaluation of startup status and optimization of operating performance of centrifugal pumps.

centrifugal pump  /  startup process  /  impact head  /  transient characteristics  /  head overshoot ratio
王超林, 王浩宇, 杜继芸. 离心泵系统启动策略的试验研究. 流体机械, 2026 , 54 (5) : 18 -26 . DOI: 10.3969/j.issn.1005-0329.2026.05.003
Chaolin WANG, Haoyu WANG, Jiyun DU. Experimental study on startup strategy of centrifugal pump system[J]. Fluid Machinery, 2026 , 54 (5) : 18 -26 . DOI: 10.3969/j.issn.1005-0329.2026.05.003
随着节能减排需求的不断提升,用更加清洁、无污染的水电取代高污染、高耗能的火电已经成为大势所趋。同时,由于风能与太阳能的间歇性、不稳定性和波动特性,储能技术在保障电网稳定和能源高效转化方面发挥着关键作用。目前,抽水蓄能是技术最成熟、经济性最优、最具大规模开发条件的储能方式之一[1]。它能够将电能转化为水的势能进行储存,并在电网需要时迅速释放能量,有效平衡发电与用电需求,对于实现可再生能源发电系统的灵活电网集成具有不可代替的重要作用。然而,抽水蓄能电站的运行通常涉及频繁的启停操作,这对其中的关键设备——储能泵的性能提出了极高的要求。离心泵作为一种常见的储能泵,运行中常面临瞬态压力波动、汽蚀等复杂工况的挑战。压力波动与空化现象容易引发振动,进而影响泵组的稳定性及使用寿命[2-4]。因此,深入研究离心泵在启动条件下的瞬态效应,对于优化泵的设计与运行策略、提升其稳定性和安全性,具有极为重要的理论意义和工程价值。
近年来,泵在稳态条件下的研究逐渐完善,然而泵在启动和停止过程下的瞬态特性引起了广泛关注。许多学者开展了泵启停过程的数值模拟研究,为深入了解泵的瞬态内流场性能提供了新的研究方向。LI等[5-6]采用动态滑移区域方法捕捉离心泵的瞬态流动演化,研究发现,启动过程中流动加速度和瞬态水力损失导致瞬态扬程系数低于稳态值。LI等[7]通过滑移网格法对混流泵启动过程中的内部流动进行数值模拟,结果显示,启动初期叶轮内流场不稳定,涡流明显,随着转速稳定,流动逐渐平稳。FU等[8]通过数值模拟与试验相结合的方法探究了轴流泵在启动过程中的瞬态特性,结果表明,当转速达到额定速度时,瞬态冲击扬程上升到额定扬程的1.87倍。ZHANG等[9]分析了混流泵在不同叶片数量下启动时的瞬态汽蚀现象,发现叶片数量对汽蚀的时空演化有显著影响,增加叶片数量可有效抑制汽蚀,但存在非线性关系。REN等[10]通过数值模拟,探究了混流泵不同转速启动方案对流场和外部特性的影响,提出了综合评估流场稳定性的评估函数,结果表明,分段线性启动方案最能降低流场参数波动,减少冲击水头和压力脉动,提高混流泵的启动稳定性。ZHANG等[11]通过数值模拟研究了泵作为涡轮机在不同启动加速度下的瞬态外特性及其能量损失,结果显示,流量和出口静压曲线滞后于转速,扬程曲线在不同启动速度下呈现不同的上升趋势。张学静等[12]对混输双螺杆泵内气液两相流场进行瞬态数值模拟,发现含气率对泵内流动及转子变形有显著影响。
同时,在泵的瞬态过程研究中,针对其能量特性的研究主要集中在试验方面。TSUKAMOTO等[13-14]对离心泵启停过程中的瞬态特性进行了理论和实验研究,结果表明,脉冲压力和叶轮叶片周围环流的滞后性对瞬态特性和准稳态特性之间的差异起着主导作用。LEFEBVRE等[15]研究了离心泵在瞬态过程下的水力性能,其结果进一步证实了瞬态特性和准稳态特性之间存在偏差。王乐勤等[16-17]研究表明,混流泵启动时会出现瞬间压力冲击,且随着转速上升,扬程和流量的增加明显滞后于转速的上升。胡征宇等[18]通过无量纲分析发现,启动瞬态初期存在一个显著的扬程系数超调现象:瞬态无量纲扬程会形成一个远高于准稳态值的脉冲峰值,并迅速回落。吴大转等[19-20]通过试验研究了离心泵快速启动过程中的外部特性,结果表明,管路阻力特性直接影响流量和扬程的上升历程,同时还探究了离心泵启动过程中的瞬态空化特性,发现低入口压力和高转速条件下空化现象显著,会导致性能下降和扬程波动,但启动过程中的加速对空化有一定抑制作用。ZHANG等[21]通过试验发现,在启停阶段,泵内部会出现流量急剧变化、局部压力冲击等复杂瞬态水力现象,这些现象会随着泵出口阀门开度的调整而呈现不同规律。CHALGHOUM等[22]深入研究了离心泵启动阶段的瞬态特性,运用非稳态不可压缩流体方程并结合特征线法开展数值求解,同时通过试验对模型进行验证,研究发现,离心泵的瞬态响应受启动时长、叶轮几何结构及阀门开度的显著影响。李伟等[23]建立了瞬态外特性和压力脉动测量系统,通过试验研究混流泵在不同启动时间和流量条件下的压力脉动时频特性,结果表明,随着泵转速的增加,流量和扬程曲线呈现出缓慢上升、快速上升后趋于稳定的三个阶段;同时还发现,启动时间越短、流量越大时,压力冲击现象越显著。LU等[24]通过试验研究了混流泵在稳态和快速启动条件下的空化与振动相关性,发现空化发生时,泵内高频振动明显增加,集中于1 200~1 400 Hz频段。CHAI等[25]研究揭示了启动初期叶轮内低压区和强涡流的形成机制及其演变规律,阐明了压力波动的时频特性。LU等[26]通过试验研究了离心泵在储能站稳态及启动工况下的汽蚀与振动的相关性,建立了同步试验系统以捕捉汽蚀和振动性能,结果显示,启动过程中汽蚀与振动存在显著相关性,较短的启动时间可有效抑制启动过程中的汽蚀现象。赵斌等[27]探究了不同启动转速下离心泵的压力脉动特性,结果表明,采用0.63倍额定转速的分段启动方式能有效抑制压力脉动。
由上述可知,目前关于泵启动过程的研究多集中于数值模拟方法,分析其能量特性、压力脉动、空化及振动等特性,而针对不同启动模式对泵启动性能影响的试验研究仍较为缺乏。因此,本文以船用离心泵为研究对象,采用5种不同转速启动方案和4组不同启动时间,对其瞬态能量特性开展试验研究,系统分析启动模式对泵瞬态响应的影响。研究结果可为离心泵启动状态的评估与运行性能优化提供试验依据与参考。
本研究自主搭建了离心泵启动工况的水力性能试验台,试验系统整体结构如图1所示,主要由试验泵、循环管路系统、动力驱动系统及同步数据采集系统构成。试验蜗壳和叶轮实体如图2所示[28],泵主要参数见表1。
在本次试验中,所采用的试验泵为半开式离心泵。循环管路系统由储水罐、电动球阀以及循环管路组成,用于建立并维持稳定的水流循环。动力驱动系统则包括额定功率为3.0 kW的伺服电机、伺服驱动器以及任意波形发生器,用于为试验泵提供准确的转速控制。数据采集系统由电磁流量计、进出口处的高频动态压力传感器、转矩转速传感器以及同步数据采集仪组成,能够实现对流量、压力、转矩及转速等参数的实时同步测量与采集,确保实验数据的准确性和可靠性。
试验通过任意波形发生器输出电压信号来控制启动转速曲线,伺服驱动器接收该信号后,将对应的速度响应信号传递至伺服电机,其中,0~5 V电压信号与0~1 500 r/min的转速呈线性关系。试验采用转矩转速传感器测量瞬时转速和扭矩,测量范围为0~10 N⋅m,精度达0.3%。流量采集使用测量范围0~0.028 m3/s、精度0.3%的电磁流量计,高频动态压力传感器的测量范围为0~200 kPa、响应频率为10 kHz、精度为0.5%。最后,同步数据采集仪将所有测量结果输入计算机中。
为了深入探究多样化的启动策略对离心泵瞬态性能的影响,试验设计了5种不同的速度函数作为启动曲线,具体包括:一段线性启动方案a、二段线性启动方案b(先急后缓)、二段线性启动方案c(先缓后急)、指数型启动方案d和双曲正切型启动方案e。离心泵的额定转速设定为1 450 r/min,同时选取了0.5,1.0,1.5,2.0 s共4个不同的启动时间进行试验。每种启动方案的具体函数模型见表2。其中,参数m用于调控函数曲线的增长速率;参数r决定了函数曲线的陡峭程度;参数k代表函数曲线的中点时间位置。
以启动时间T=2.0 s为例,对应的转速曲线如图3所示。
在控制理论中,“过冲”是衡量系统响应动态特性的一个重要指标。在泵的运行过程中,扬程是一个关键的性能参数,它表示泵能够提供的能量大小,直接关系到其输送流体的能力。对于一个理想、稳定的运行状态,扬程会达到一个相对恒定的值,称其为稳态扬程。然而,泵在启动过程中会经历一个动态过渡阶段,这个阶段的扬程表现与稳态时显著不同,扬程曲线出现显著波动峰值,称其为冲击扬程。在研究不同泵型、不同启动时长、不同启动策略对扬程动态特性的影响时,一个统一、标准化和可横向比较的量化指标是至关重要的。本研究提出一种用于评估泵瞬态性能的函数——过冲率K,即将启动过程中的冲击扬程除以稳定运行时的稳态扬程,得到扬程过冲率K,其具体表达式如下:
K=∑1nmaxt∈0,T+0.2H(t)startup∑1n1/b-afs∑i=1b-afsH(t)steady
式中,n为总试验次数;T为启动时间,s;H(t)为某时刻扬程,m;a,b为截取的循环系统稳定运行的时间区间,s;fs为采样频率,Hz。
考虑到冲击扬程响应相对启动结束转速达到额定值存在明显的滞后性,因此,在构建评估函数时,将数据采集的时长基准从原始启动时间延长了0.2 s。此外,选取3.0~4.0 s的连续试验数据作为稳定运行时间区间,以确保评估结果的可靠性。
通过比较K值,定量地判断启动模式对系统的冲击性和平稳性,高K值代表需要对启动过程进行优化,以降低整个系统的运行风险。当K>1时,表明启动过程中出现了冲击扬程,其值越大代表系统在启动阶段承受水力冲击越剧烈,系统稳态性能相对较差;当K≈1时,表示扬程平滑、无显著过冲地达到了稳定值,是稳定性能较高的状态;当K<1时,这种情况在理论上并不存在。
离心泵的启动过程涉及转速和流量从零逐渐增加至额定值(n=1 450 r/min,Q=25 m3/h)。针对启动时间T分别为0.5,1.0,1.5,2.0 s的瞬态过程进行了试验研究。试验记录了转速、进出口压力、扬程和轴功率随时间的变化,结果如图4~8所示。
图4示出方案a启动模式下的能量特性演变。试验表明,采集的转速变化趋势与设计的速度曲线高度吻合,并在启动结束后稳定在1 450 r/min。启动时间为0.5,1.0,1.5,2.0 s时,冲击扬程分别为7.104,6.958,6.912,6.872 m。冲击扬程随启动时间的增加而逐渐减小,启动时间越短,冲击扬程波峰越明显,这一特性与其他启动模式相同。轴功率变化趋势与扬程增长过程近似,均为非线性增长。值得注意的是,所有启动模式均表现出共同特征:轴功率均在转速达到稳定值后出现峰值,但轴功率由峰值向稳态值衰减的过程较为缓慢,这主要是开阀启动所施加的水力负载导致的。
图5示出方案b启动模式下能量特性的演变过程。可以看出,方案b随启动时间增加,冲击扬程分别为7.046,6.907,6.876,6.842 m,都低于方案a,且扬程增长过程近似线性。由于加速度曲线的影响,在启动时间为1.0,1.5,2.0 s时,出口压力出现了驼峰现象;而0.5 s的启动时间较短,未能捕捉到这一现象。加速度的减小对轴功率的响应造成了显著影响:在加速度由高转低后,轴功率的增长中断,形成了一个约0.05 s的稳定期,随后才恢复上升趋势。这主要是因为流体惯性,即抵抗运动状态改变的固有属性,其大小与流体的加速度成正比。
图6示出方案c启动模式下能量特性的演变过程。0.5,2.0 s对应的冲击扬程分别为7.116,6.959 m,方案c在各启动时间的冲击扬程均为最大值,表现出较明显的扬程峰值现象,表明启动加速度对泵冲击扬程影响较大。相比其他方案,方案c在第2阶段采用了更高的角加速度范围:24.17~96.67 rad/s2,故引起了轴功率响应的显著差异。其功率曲线并未单调上升,而是表现为复杂的双峰振荡过程:启动末期出现一个局部功率峰值,经短暂下降后,轴功率再次上升至局部最大值,随后逐渐收敛至稳定运行值。启动过程的高峰值轴功率表明,产生瞬态扬程时,泵能量消耗也最大。因此,从扬程和轴功率两方面综合考虑,表明该方案的启动过程最剧烈、对系统动态冲击最大。
图7示出方案d启动模式下能量特性的演变过程。
经对比发现,方案d的冲击扬程最低,其中,4种启动时间对应的冲击扬程分别为6.923,6.872,6.865,6.836 m,这表明转速波动会导致离心泵的扬程波动,而较高的冲击扬程通常是由加速阶段后期较大的加速度引起的。方案d的加速度逐渐减小并趋近于零,因此,产生的冲击扬程较小。进口压力变化曲线显示,方案d的进口压力谷值均出现在启动后的0.5 s之前。该现象可解释如下:在启动初期,由于加速度较大,流体被急剧加速,从而导致泵进口压力显著骤降;随后,进口压力迅速回升并趋于稳定。随着启动时间增加,转速曲线变得更加平滑,带来更低的瞬态扬程冲击和轴功率峰值,表明该模式下的启动过程最平稳、对系统的动态冲击最小。
图8示出方案e启动模式下能量特性的演变过程。分析表明,方案e的变化趋势与方案d相似,但在启动期间,方案e产生的冲击扬程分别为7.028,6.885,6.866,6.845 m,略大于方案d,而方案e加速度先逐渐上升,并在启动时间中间点达到最大,然后再下降至零,加速度变化呈对称性,且较大的加速度启动时间较短。同时研究发现,进口压力的瞬态特性与启动时间密切相关:随启动时间的延长,进口压力谷值的幅值显著减小。此外,压力谷值均在加速结束前出现,并且其发生时刻会随着启动时间的增加而相对提前。相比于线性加速方式,该方案的瞬态冲击性也较小。
5种启动方案的扬程过冲率曲线及其函数拟合曲线如图9所示。在0.5~2.0 s的启动时间范围内均出现冲击扬程现象,且扬程过冲率随时间推移呈逐渐降低趋势。其中,0.5~2.0 s启动时间,方案c的扬程过冲率最大,分别为1.039 5,1.037 6,1.028 4,1.020;方案d的扬程过冲率均为最小,其值分别为1.011 8,1.004 7,1.002 7,1.001 3,二者分别相差2.74%,3.27%,2.56%,1.87%。说明不同的启动模式对循环系统的影响显著不同。相对而言,采用平滑的加速度曲线进行启动,能够使系统运行更为稳定。除方案c外,冲击扬程从最短启动时间0.5 s增加至1.0 s时降低最为显著,约占总降低值的65%,而启动时间为1.5 s和2.0 s时,扬程过冲率相近。通过函数拟合分析可知,扬程过冲率的变化规律与指数函数相似,启动时间越短,扬程过冲率越高。从扬程过冲率的角度分析,方案d启动模式在各个时间段表现最佳。
(1)对比启动过程的瞬态扬程变化可知,冲击扬程受加速度影响显著。在相同启动时间内,指数型启动模式因末期加速度较低,冲击扬程最小,分别为6.923,6.872,6.865,6.836 m,表明该启动模式更具优势。
(2)提出扬程过冲率作为评估离心泵瞬态性能的指标。分析表明,在相同启动模式下,该值随时间逐渐降低,且整体呈凹函数变化趋势,其中指数型启动模式的过冲率最小,分别为1.011 8,1.004 7,1.002 7,1.001 3。
(3)离心泵启动过程中的外特性变化趋势与其加速度曲线具有相关性:二段线性加速时进口压力呈现两次明显峰值,指数及双曲正切等平滑加速模式下进口压力仅出现单次峰值。

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doi: 10.3969/j.issn.1005-0329.2026.05.003
  • 接收时间:2025-08-12
  • 首发时间:2026-10-22
  • 出版时间:2026-05-30
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  • 收稿日期:2025-08-12
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    1江南大学 机械工程学院,江苏 无锡 214122
    2江南大学 江苏省食品先进制造装备技术重点实验室,江苏 无锡 214122

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杜继芸(1991),男,博士,副教授,主要从事管道式水轮机设计优化研究工作,通信地址:214122江苏省无锡市滨湖区蠡湖大道1800号江南大学机械工程学院,E-mail:。
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