[1]王慧洁,仇宝云,盛林华,等.特低扬程泵站超扬程运行水泵叶片安全校核[J].江苏水利,2022,(06):26-31.
 WANG Huijie,QIU Baoyun,SHENG Linhua,et al.Blade safety check under over-head operation conditions of ultra-low head pump stations[J].JIANGSU WATER RESOURCES,2022,(06):26-31.
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特低扬程泵站超扬程运行水泵叶片安全校核()
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《江苏水利》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年06期
页码:
26-31
栏目:
水利工程建设
出版日期:
2022-07-05

文章信息/Info

Title:
Blade safety check under over-head operation conditions of ultra-low head pump stations
文章编号:
1007-7839(2022)06-0026-0006
作者:
王慧洁1仇宝云1盛林华2罗梅2李玮华2
(1.扬州大学电气与能源动力工程学院,江苏 扬州 225127;2.苏州市河道管理处,江苏 苏州 215004)
Author(s):
WANG Huijie1 QIU Baoyun1 SHENG Linhua2 LUO Mei2 LI Weihua2
(1.College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China;2.Suzhou River Course Administration Office, Suzhou 215004,China)
关键词:
特低扬程水泵超扬程运行叶片安全校核最大工作应力叶片疲劳强度
Keywords:
ultra-low head pump over-head operation safety check of pump blade maximum working stress fatigue strength of blade
分类号:
TV675
文献标志码:
B
摘要:
特低扬程泵站超扬程运行时,扬程增加比例大,长时间超扬程运行可能带来安全隐患。分析了轴流泵单叶片压力面压力分布情况,经理论计算和分析,确定了叶片根部截面为危险截面,给出了叶片轴向水推力、叶片阻力和叶片旋转离心力作用在叶片根部截面产生应力的理论计算方法,分析确定叶片根部断面进水边正面点为危险点,计算危险点的应力状态,给定最大应力的脉动范围;分别按最大工作应力不超过叶片材料许用应力、叶片工作安全系数不小于疲劳安全系数对危险点进行了安全校核。对苏州防洪工程4座泵站的4种型号水泵超扬程运行进行了叶片安全校核,结果表明,4种水泵叶片最大工作应力均小于许用应力,疲劳强度也都满足要求。
Abstract:
When the ultra-low head pump station is in the over-head operation condition, the proportion of head increases greatly, and the long-term over-head operation may bring potential safety hazards. The pressure distribution on pressure surface of axial flow pump blade was analyzed, the root of blade was considered as dangerous section through theory analyzing and calculating, the stress calculation method was given in this paper, which included three parts: axial hydraulic thrust of blade, centrifugal force at the connection between blade and hub, resistance of blade. The front point of inlet edge at the root of blade was analyzed as the dangerous point, and the stress of the point was calculated, the variation range of maximum stress was given. According to the maximum working stress shall not exceed the allowable stress and the working safety factor of blade shall not be less than the fatigue safety factor, the safety of dangerous point was checked. Taking four pump stations of Suzhou flood control project as examples, the security was corrected for four types of blade, the results showed that the maximum working stress of four types of blade were less than allowable stress.

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备注/Memo

备注/Memo:
收稿日期:2021-11-19
基金项目:国家自然科学基金(52179091,51379182)、江苏省水利科技项目(2019019、2019017)
作者简介:王慧洁(1997—),女,博士,从事水力系统可靠性理论与优化节能研究。E-mail:160639362@qq.com
通信作者:仇宝云(1962—),男,教授,博士,博士生导师,从事大型水泵与泵站研究和教学工作。E-mail: byqiu@yzu.edu.cn
更新日期/Last Update: 2022-06-15