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Article(id=1319293671313363792, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1319293542573392487, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2025.07.007, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1733328000000, receivedDateStr=2024-12-05, revisedDate=1747238400000, revisedDateStr=2025-05-15, acceptedDate=null, acceptedDateStr=null, onlineDate=1792473722532, onlineDateStr=2026-10-20, pubDate=1753804800000, pubDateStr=2025-07-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792473722532, onlineIssueDateStr=2026-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792473722532, creator=13701087609, updateTime=1792473722532, updator=13701087609, issue=Issue{id=1319293542573392487, tenantId=1146029695717560320, journalId=1316781260334530699, year='2025', volume='53', issue='7', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='1753804800000', pubDateStr='2025-07-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792473691838, creator='13701087609', updateTime=1792473691838, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=47, endPage=52, ext={EN=ArticleExt(id=1319293671481135953, articleId=1319293671313363792, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=Effect of geometric dimensions of floating wear rings on centrifugal pump performance, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=

In order to study the influence of geometric dimensions of floating ring on the head and efficiency of centrifugal pumps，five different sizes of floating ring were installed on the experimental pump for ZM65-40-125 centrifugal pump. When the length of the floating ring gap was the same and the width of the ring gap was changed （0.06，0.12，0.24 mm），and the width of the floating ring gap was the same but the length of the ring gap was changed（3，5，7 mm），the changes in pump flow rate and head were compared and analyzed；Calculate the theoretical leakage flow rate at the mouth ring and compare it with the test data.The results show that as the floating wear ring clearance width increases，both pump head and efficiency decrease.When clearance width increases from 0.06 mm to 0.24 mm，the maximum head reduction is 1.19 m and maximum efficiency reduction is 4.6%.As the floating wear ring clearance length shortens，both head and efficiency decrease.When clearance length decreases from 7 mm to 3 mm，the maximum head reduction is 0.38 m and maximum efficiency reduction is 1.78%，indicating insignificant decline.These trends are essentially consistent with calculated leakage flow comparisons.This study provides reference for designing centrifugal pumps with floating wear ring structures.

, authors=Feixiang YANG, Hongfei WU, Xiaofeng LAI, Miaoyun WANG, Xuemei LI, authorsList=Feixiang YANG, Hongfei WU, Xiaofeng LAI, Miaoyun WANG, Xuemei LI, authorCompany=null, correspAuthors=null, 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=1319293672840090462, articleId=1319293671313363792, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=浮动式口环几何尺寸对离心泵性能的影响, columnId=1317484287230853622, journalTitle=流体机械, columnName=设计计算, runingTitle=null, highlight=null, articleAbstract=

为了研究浮动式口环几何尺寸对离心泵扬程和效率的影响，针对ZM65-40-125离心泵，在试验泵上安装5种不同尺寸的浮动式口环，当浮动式口环间隙长度相同、改变口环间隙宽度（0.06，0.12，0.24 mm），浮动式口环间隙宽度相同、改变口环间隙长度（3，5，7 mm）时，对比分析了泵的流量和扬程的变化；同时计算口环处理论泄漏流量，并与测试数据进行对比。结果表明，随着浮动式口环间隙宽度增大，泵的扬程和效率均下降，口环宽度从0.06 mm增加到0.24 mm时，扬程最大下降1.19 m，效率最大下降4.6%；随着浮动式口环间隙长度变短，泵的扬程和效率均下降，口环长度从7 mm减小到3 mm时，扬程最大下降0.38 m，效率最大下降1.78%，下降并不明显，与计算泄漏流量对比结果基本一致。研究可为浮动式口环结构离心泵的设计提供参考。

, authors=杨飞翔, 吴宏飞, 赖晓锋, 王妙云, 李雪梅, authorsList=杨飞翔, 吴宏飞, 赖晓锋, 王妙云, 李雪梅, authorCompany=null, correspAuthors=null, authorNote=

杨飞翔（1987），男，工程师，主要从事流体机械水力设计研究工作，通信地址：311107浙江省杭州市余杭区仁和街道仁河大道46号南方泵业股份有限公司，E-mail：。

, correspAuthorsNote=null, 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=aiYRnlqUHT4BOJdIuXL3YQ==, magXml=29aQs/JPCgQy7UI1tX8tsA==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=9VAsIN48BbzI9HjTrNh/6w==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=uM95EUaHLJeo1a3wbxsuDg==, mapNumber=null, fund=null)}, authors=[Author(id=1319293733590381133, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=yfx@nanfang-pump.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1319293733661684303, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, authorId=1319293733590381133, language=EN, stringName=Feixiang YANG, firstName=Feixiang, middleName=null, lastName=YANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=Nanfang Pump Co.，Ltd.，Hangzhou 311107，China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1319293733749764688, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, authorId=1319293733590381133, language=CN, stringName=杨飞翔, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=南方泵业股份有限公司，杭州 311107, bio={"content":"

杨飞翔（1987），男，工程师，主要从事流体机械水力设计研究工作，通信地址：311107浙江省杭州市余杭区仁和街道仁河大道46号南方泵业股份有限公司，E-mail：。

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杨飞翔（1987），男，工程师，主要从事流体机械水力设计研究工作，通信地址：311107浙江省杭州市余杭区仁和街道仁河大道46号南方泵业股份有限公司，E-mail：。

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label=Fig.5, caption=Flow-head test curve, figureFileSmall=Ah/E9K/jo5WE3Mq3jIvmBA==, figureFileBig=REQRdIGbpCL0L+vWfcTJHw==, tableContent=null), ArticleFig(id=1319293739164611191, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, language=CN, label=图5, caption=流量-扬程测试曲线, figureFileSmall=Ah/E9K/jo5WE3Mq3jIvmBA==, figureFileBig=REQRdIGbpCL0L+vWfcTJHw==, tableContent=null), ArticleFig(id=1319293739244302968, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, language=EN, label=Fig.6, caption=Flow-efficiency test curve, figureFileSmall=ksTLbBrDRtlWpbJXlWQE7g==, figureFileBig=P/xt7CM4QribfjyGW1lspw==, tableContent=null), ArticleFig(id=1319293739328189049, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, language=CN, label=图6, caption=流量-效率测试曲线, figureFileSmall=ksTLbBrDRtlWpbJXlWQE7g==, figureFileBig=P/xt7CM4QribfjyGW1lspw==, tableContent=null), ArticleFig(id=1319293739428852346, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, language=EN, label=Tab.1, caption=

Five kinds of pump floating wear ring geometry size

, figureFileSmall=null, figureFileBig=null, tableContent=
泵编号A泵B泵C泵D泵E泵
间隙长度L/mm55537
间隙宽度S/mm0.060.120.240.060.06
), ArticleFig(id=1319293741073019516, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, language=CN, label=表1, caption=

5种泵浮动口环几何尺寸

, figureFileSmall=null, figureFileBig=null, tableContent=
泵编号A泵B泵C泵D泵E泵
间隙长度L/mm55537
间隙宽度S/mm0.060.120.240.060.06
), ArticleFig(id=1319293741182071421, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, language=EN, label=Tab.2, caption=

Theoretical calculation result of floating wear ring leakage

, figureFileSmall=null, figureFileBig=null, tableContent=
测试泵A泵B泵C泵D泵E泵
泄漏量/(m3⋅h-1)0.410.932.040.530.36
泄漏量占比/%1.643.728.162.121.44
), ArticleFig(id=1319293741391786622, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293671313363792, language=CN, label=表2, caption=

浮动式口环泄漏量理论计算结果

, figureFileSmall=null, figureFileBig=null, tableContent=
测试泵A泵B泵C泵D泵E泵
泄漏量/(m3⋅h-1)0.410.932.040.530.36
泄漏量占比/%1.643.728.162.121.44
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浮动式口环几何尺寸对离心泵性能的影响
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杨飞翔 , 吴宏飞 , 赖晓锋 , 王妙云 , 李雪梅
流体机械 | 设计计算 2025,53(7): 47-52
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流体机械 |设计计算 2025 , 53 (7) : 47 -52
浮动式口环几何尺寸对离心泵性能的影响
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杨飞翔（1987），男，工程师，主要从事流体机械水力设计研究工作，通信地址：311107浙江省杭州市余杭区仁和街道仁河大道46号南方泵业股份有限公司，E-mail：。

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杨飞翔（1987），男，工程师，主要从事流体机械水力设计研究工作，通信地址：311107浙江省杭州市余杭区仁和街道仁河大道46号南方泵业股份有限公司，E-mail：。

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杨飞翔 , 吴宏飞, 赖晓锋, 王妙云, 李雪梅
作者信息
  • 南方泵业股份有限公司，杭州 311107
作者简介:

杨飞翔（1987），男，工程师，主要从事流体机械水力设计研究工作，通信地址：311107浙江省杭州市余杭区仁和街道仁河大道46号南方泵业股份有限公司，E-mail：。

Effect of geometric dimensions of floating wear rings on centrifugal pump performance
Feixiang YANG , Hongfei WU, Xiaofeng LAI, Miaoyun WANG, Xuemei LI
Affiliations
  • Nanfang Pump Co.，Ltd.，Hangzhou 311107，China
出版时间: 2025-07-30 doi: 10.3969/j.issn.1005-0329.2025.07.007
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摘要
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为了研究浮动式口环几何尺寸对离心泵扬程和效率的影响，针对ZM65-40-125离心泵，在试验泵上安装5种不同尺寸的浮动式口环，当浮动式口环间隙长度相同、改变口环间隙宽度（0.06，0.12，0.24 mm），浮动式口环间隙宽度相同、改变口环间隙长度（3，5，7 mm）时，对比分析了泵的流量和扬程的变化；同时计算口环处理论泄漏流量，并与测试数据进行对比。结果表明，随着浮动式口环间隙宽度增大，泵的扬程和效率均下降，口环宽度从0.06 mm增加到0.24 mm时，扬程最大下降1.19 m，效率最大下降4.6%；随着浮动式口环间隙长度变短，泵的扬程和效率均下降，口环长度从7 mm减小到3 mm时，扬程最大下降0.38 m，效率最大下降1.78%，下降并不明显，与计算泄漏流量对比结果基本一致。研究可为浮动式口环结构离心泵的设计提供参考。

离心泵  /  浮动式口环  /  口环间隙长度  /  口环间隙宽度

In order to study the influence of geometric dimensions of floating ring on the head and efficiency of centrifugal pumps，five different sizes of floating ring were installed on the experimental pump for ZM65-40-125 centrifugal pump. When the length of the floating ring gap was the same and the width of the ring gap was changed （0.06，0.12，0.24 mm），and the width of the floating ring gap was the same but the length of the ring gap was changed（3，5，7 mm），the changes in pump flow rate and head were compared and analyzed；Calculate the theoretical leakage flow rate at the mouth ring and compare it with the test data.The results show that as the floating wear ring clearance width increases，both pump head and efficiency decrease.When clearance width increases from 0.06 mm to 0.24 mm，the maximum head reduction is 1.19 m and maximum efficiency reduction is 4.6%.As the floating wear ring clearance length shortens，both head and efficiency decrease.When clearance length decreases from 7 mm to 3 mm，the maximum head reduction is 0.38 m and maximum efficiency reduction is 1.78%，indicating insignificant decline.These trends are essentially consistent with calculated leakage flow comparisons.This study provides reference for designing centrifugal pumps with floating wear ring structures.

centrifugal pump  /  floating wear ring  /  clearance length of wear ring  /  clearance width of wear ring
杨飞翔, 吴宏飞, 赖晓锋, 王妙云, 李雪梅. 浮动式口环几何尺寸对离心泵性能的影响. 流体机械, 2025 , 53 (7) : 47 -52 . DOI: 10.3969/j.issn.1005-0329.2025.07.007
Feixiang YANG, Hongfei WU, Xiaofeng LAI, Miaoyun WANG, Xuemei LI. Effect of geometric dimensions of floating wear rings on centrifugal pump performance[J]. Fluid Machinery, 2025 , 53 (7) : 47 -52 . DOI: 10.3969/j.issn.1005-0329.2025.07.007
正文
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0　引言
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离心泵具有结构简单、运行可靠、便于维修等优点，作为一种通用机械，在国民经济各个领域中都得到了广泛的应用［1-3］。
目前，国内外关于口环间隙对泵性能影响的研究成果，大多是研究口环间隙宽度在0.2 mm以上的固定式口环离心泵。SINGH等［4］提出了一种基于模型的方法来阐明口环间隙对泵性能的影响，发现泄漏量随磨损环间隙的增加呈非线性趋势，表现在2个临界值上，当间隙超过第1个临界值时，泄漏量迅速增加，导致泵的扬程下降；当间隙超过第2个临界值时，泄漏量变化则较为恒定。高波等［5］采用三维数值计算和试验的方法研究了叶轮口环间隙对离心泵性能及流动特性的影响，发现叶轮口环间隙从0.25 mm增大到0.75 mm时，离心泵扬程随之减小，效率也随之降低。付强等［6］研究了前口环间隙对离心泵内流动特性的影响，发现叶轮口环间隙从0.2 mm增大到1.2 mm时，扬程、效率均出现下降，扬程下降了5.37%，效率下降了4.07%。潘中永等［7］通过数值模拟和试验的方法，研究了叶轮口环间隙对离心泵性能的影响，发现当口环间隙值减小时，离心泵的扬程和总效率均增大。赵伟国等［8］利用数值计算和试验验证相结合的方法，研究了前口环间隙和前口环长度对立式自吸泵性能的影响，研究发现，前口环间隙和前口环长度对自吸泵自吸性能均有影响，适当减小前口环间隙和增大前口环长度均能提高泵的自吸性能，且当前口环间隙过大时，前口环间隙对泵自吸性能的影响大于前口环长度对泵自吸性能的影响。
目前，离心泵的口环密封结构大多采用传统固定式口环结构，这种结构在泵运转时，叶轮部件受力会使泵轴产生挠度，导致叶轮与口环摩擦，特别在卧式悬臂式离心泵上表现得更为突出［9-13］。为保证泵运行的可靠性，国内外泵设计标准中均对口环间隙做了明确限制，如API 610标准中规定了口环在不同直径下的最小口环间隙，然而这又限制了泵效率的进一步提升［14］。本文提出了一种新型结构的浮动式口环，可很好地解决固定式口环存在的上述难题，明显减小泵的口环间隙，提升泵的效率水平，具有较广泛的应用前景。同时，采用性能测试对比和理论计算相结合的方式，针对浮动式口环几何尺寸变化对离心泵性能的影响进行研究，可为浮动式口环结构离心泵设计及其应用提供参考。
1　浮动式口环结构
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以一种新型结构的浮动式口环为研究对象，该口环结构的离心泵在国内外应用很少，相关研究也很少。该浮动式口环有别于传统固定式口环，结构如图1所示。其主要特点是可以与叶轮一起进行径向浮动，从而能够进一步减小口环的间隙宽度，不会出现固定式口环泵在装配或运行时，因间隙宽度太小而经常出现与叶轮硬摩擦，甚至卡死的问题［15］。
该新型浮动式口环的工作原理如图2所示。口环安装在泵体口环座内，用口环压盖轴向固定，预留0.1~0.2 mm轴向窜动间隙。
口环压盖和口环上设计有凸点和凹槽，使口环能够进行径向浮动，但不会随叶轮进行圆周转动，起到防转动的作用。从叶轮排出的液体一部分回流叶轮进口处，由于轴向力的原因，口环会紧紧贴合在泵体口环座密封面上，回流的液体只能通过口环间隙处回流，而口环的最小单边间隙可控制至0.05 mm，因口环处泄漏回流的液体越少，泵的容积损失就越小，泵的效率也就越高。
相比固定式口环，浮动式口环具有以下优点。
（1）密封节流效果好。该结构大大降低了口环的间隙，可有效降低泵的回流容积损失，提高泵的效率水平。通过多次试验表明，采用浮动式口环离心泵比固定式口环离心泵的效率可提升2%~5%。
（2）转子对中要求低。该浮动式口环可与叶轮同步进行径向浮动，故转子部件对中精度要求低，降低了零部件的加工精度要求和装配难度。
（3）泵的使用寿命长。该浮动式口环采用耐磨、耐腐蚀的PPS+40%GF材料，且叶轮不会与口环硬摩擦，故泵的使用寿命更高。
2　试验系统
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以ZM65-40-125型不锈钢冲压型端吸离心泵为试验对象。该泵额定流量25 m3/h，额定扬程20 m，额定效率75%，电机功率2.2 kW，电机转速2 900 r/min，泵比转速93.3。该泵体进出口直径分别为65，40 mm，叶轮外径135 mm。该泵采用浮动式口环结构设计，口环内径69 mm，外径86 mm，厚度（5±0.1） mm，口环采用耐磨、耐腐蚀的PPS+40%GF材料，泵体和叶轮采用不锈钢冲压、焊接工艺制作，泵为套轴式直连结构。
为了保证测试数值结果的可靠性，试验装置采用闭式试验台对离心泵进行性能测试。试验台测试系统如图3所示。
该试验台符合GB/T 3216—2016《回转动力泵 水力性能验收试验 1级、2级和3级》和GB/T 12785—2014《潜水电泵 试验方法》1级精度要求，并通过中国计量认证与中国合格评定国家认可委员会认证。试验采用的仪器仪表精度等级情况：压力变送器0.2级，电磁流量计0.5级，电参数仪0.2级，仪器仪表均在检定有效期内。
试验采用同一台离心泵，配置5种不同尺寸的浮动式口环，并分别命名为A泵、B泵、C泵、D泵、E泵。如图4所示，通过测试相同间隙长度L，不同间隙宽度S（0.06，0.12，0.24 mm）时泵的性能差异，分析浮动式口环间隙宽度对离心泵性能的影响；通过测试相同间隙宽度S，不同间隙长度L（3，5，7 mm）时泵的性能差异，分析浮动式口环间隙长度对离心泵性能的影响。5种代号泵配套的浮动口环尺寸见表1。
3　试验结果与分析
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3.1　扬程曲线的对比分析
通过测试并统计5种泵的扬程测试数据结果，分析泵在不同口环间隙宽度和长度下扬程的变化情况。
5种配套浮动式口环离心泵的流量-扬程测试曲线如图5所示。从图5（a）可以看出，L均为5 mm时，在整个流量区间内，随着S增大，泵扬程呈现逐渐下降的趋势；在流量为25 m3/h，S=0.24 mm时泵的扬程比S=0.12 mm和S=0.06 mm时分别降低了0.10 m和1.19 m。从图5（b）可以看出，S均为0.06 mm时，在整个流量区间内，随着L减小，泵的扬程呈现逐渐下降的趋势；在流量为25 m3/h，L=3 mm时泵的扬程比L=5 mm和L=7 mm时分别低了0.14 m和0.38 m。扬程下降的主要原因：当浮动式口环间隙增大或间隙长度变短时，从口环处泄漏的高能量流体越多，与叶轮进口处的低能量流体进行混合，会产生更大的能量损失，导致泵的扬程下降［16］。
3.2　效率曲线的对比分析
测试统计5种泵的效率测试数据，分析泵在不同间隙宽度和长度下效率的变化情况。5种浮动式口环离心泵的流量-效率测试曲线见图6。
从图6（a）可以看出，L均为5 mm时，在整个流量区间内，随着S增大，泵效率呈现逐渐下降的趋势；在流量为25 m3/h，S=0.24 mm时泵的效率比S=0.12 mm和S=0.06 mm时分别低约1.3%和4.6%。从图6（b）可以看出，S均为0.06 mm时，在整个流量区间内，随着L减小，泵的效率呈现逐渐下降的趋势；在流量为25 m3/h，L=3 mm时泵的效率比L=5 mm和L=7 mm时分别低约0.58%和1.78%。效率下降的主要原因：当浮动式口环间隙增大或间隙长度变短时，会导致口环处泄漏流量增大，叶轮需做更多的功以保证流向泵壳中的流量不变，消耗更大的轴功率，导致泵效率下降［17］。
4　口环泄漏流量理论计算分析
收起
计算5种不同浮动式口环几何尺寸的离心泵的理论泄漏量，并进行对比分析。泄漏量采用下式计算［18］：
Qsp=AScax
其中：
               cax=2g∆H/(ζEA+λL2S)
∆H=0.6H出-H进
式中，Qsp为泄漏量，m3/s；AS为间隙过流面积，m2；cax为间隙内流体速度，m/s；g为重力加速度，m/s2；ζEA为损耗系数，ζEA=1.5；λ为摩擦系数，λ=0.05；L为间隙长度，m；S为间隙宽度，m；H出为叶轮出口扬程，m；H进为叶轮进口扬程，m。
浮动式口环泄漏量理论计算结果见表2。
对比A泵、B泵和C泵的计算数据可知，在L均为5 mm，S=0.24 mm时的泄漏量分别约为S=0.12 mm和S=0.06 mm时的2.3倍和5倍，浮动式口环处泄漏量占额定流量比值从1.64%增加到8.16%。对比A泵、D泵和E泵的计算数据可知，在S均为0.06 mm时，L=3 mm时泄漏量分别约为L=5 mm和L=7 mm时的1.3倍和1.4倍，浮动式口环处泄漏量差距不大，计算数据与试验泵的性能表现基本一致。
5　结论
收起
通过对5种不同几何尺寸的浮动式口环离心泵进行性能测试，对测试数据的性能差异情况进行了对比研究，同时，计算了不同几何尺寸的浮动式口环泵理论泄漏量。经研究分析，得出以下结论。
（1）离心泵的扬程和效率与浮动式口环的间隙宽度和间隙长度均有关，口环的间隙宽度越小，泵的扬程和效率越高；口环的间隙长度越短，泵的扬程和效率越低。
（2）浮动式口环间隙宽度从0.06 mm增加到0.12 mm时，泵的扬程和效率均有所下降，但下降幅度不大，当口环间隙宽度增加到0.24 mm时，泵的扬程和效率则下降明显；浮动式口环间隙长度从7 mm下降到3 mm时，扬程和效率均下降，但在该长度范围内下降并不明显，与口环泄漏量计算结果一致。

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2025年第53卷第7期
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doi: 10.3969/j.issn.1005-0329.2025.07.007
  • 接收时间：2024-12-05
  • 首发时间：2026-10-20
  • 出版时间：2025-07-30
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  • 收稿日期：2024-12-05
  • 修回日期：2025-05-15
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2种不同金属材料的力学参数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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