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1、第36卷第3期水利水电科技进展2016年5月Vol.36No.3AdvancesinScienceandTechnologyofWaterResourcesMay2016DOI:10.3880/j.issn.10067647.2016.03.013水电机组推力轴承镜板泵及油循环冷却系统的水力优化设计11112赖喜德,张摇翔,陈小明,卢摇珍,杨仕福(1.西华大学能源与动力工程学院,四川成都摇610039;2.东方电气集团东方电机有限公司,四川德阳摇618000)摘要:针对水电机组推力轴承镜板泵流体动力设计过程中孔的布置形式以及集油槽的断面形状、面积和出口管路直径等几何参数优化问题,提出适合镜板
2、泵流道设计的镜板泵性能预测及优化设计方法。通过不同几何参数组合,采用基于多工况数值模拟的性能预测方法来分析镜板泵的主要过流部件的关键尺寸、形状等对其性能的影响,并在此基础上提出一种基于整个循环系统协同的镜板泵水力优化设计方法,可提高自循环系统设计中流体动力系统的性能及可靠性。对比试验表明,在原试验循环系统参数不变的条件下,某大型水电机组推力轴承镜板泵在优化设计后平均扬程提高4m,平均效率提高5郾5%,且H鄄Q曲线能更好保证变工况运行时系统的稳定性。关键词:水电机组;推力轴承;循环冷却系统;镜板泵;集油槽;优化设计;性能预测中图分类号:TK730摇摇摇文献标志码:A摇摇摇文章编号:100676
3、47(2016)03006206Hydraulicoptimizationdesignofrunner鄄pumpandoilcirculatingandcoolingsystemforthrustbearingof11112hydroelectricunits//LAIXide,ZHANGXiang,CHENXiaoming,LUZhen,YANGShifu(1.SchoolofEnergyandPowerEngineeving,XihuaUniversity,Chengdu610039,China;2.DongfangElectricMachineryCo.,Ltd.,Deyang6180
4、00,China)Abstract:Inordertooptimizethelayoutandnumberofholesandgeometricparameterssuchasthesectionshape,area,andoutletpipediameteroftheoilbathinhydrodynamicdesignofarunner鄄pumpforthethrustbearingofhydroelectricunits,amethodforperformancepredictionandoptimizationdesignsuitablefortheflowpassagesofthe
5、runner鄄pumpispresentedinthispaper.Throughcombinationofdifferentgeometricparameters,theinfluenceofthesizeandshapeofthemainflowpassagecomponentsonhydrodynamicperformanceoftherunner鄄pumpwasanalyzedusingtheperformancepredictionmethodbasedonmulti鄄conditionnumericalsimulations.Inthisway,ahydrodynamicopti
6、mizationdesignmethodfortherunner鄄pumpbasedoncooperationthroughoutthecirculationsystem,whichcanimprovetheperformanceandreliabilityofthehydrodynamicsystemforself鄄circulatingsystemdesign,isproposed.Theresultsshowthat,comparedwiththeoriginalrunner鄄pump,theaverageheadisincreasedby4m,theaverageefficiency
7、isincreasedby5郾5%,andtheH鄄Qcurvecanguaranteebetterstabilityofthesystemundervaryingconditionoperationfortheoptimizedrunner鄄pumpunderthesametestconditions.Keywords:hydroelectricunit;thrustbearing;circulatinga
