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1、2013年9月農(nóng)業(yè)機械學報第44卷第9期doi:10.6041/j.issn.1000鄄1298.2013.09.049*無閥壓電泵用橢圓組合管正交優(yōu)化設(shè)計與試驗1222鄧志丹搖何秀華搖楊搖嵩搖李搖富(1.江蘇大學理學院,鎮(zhèn)江212013;2.江蘇大學能源與動力工程學院,鎮(zhèn)江212013)摘要:為了提高無閥壓電泵中流管的流阻特性,提出一種新型橢圓組合管結(jié)構(gòu)。該流管為三通結(jié)構(gòu),匯流管是傳統(tǒng)擴散/收縮管,分流管是橢圓曲線結(jié)構(gòu)的擴散/收縮管。通過數(shù)值模擬,應(yīng)用正交方法優(yōu)化橢圓組合管的結(jié)構(gòu)參數(shù)。設(shè)計選用的匯流管最小寬度d=150滋m,流管深度H=150滋m,優(yōu)化
2、結(jié)果表明當進出口壓差為50kPa時,結(jié)構(gòu)尺寸為r=75滋m,L=3000滋m,茲=7毅,酌=80毅,a=1000滋m,b=450滋m的橢圓組合管有最高的正反向流阻系數(shù)比姿。通過MEMS技術(shù)制作出優(yōu)化后的橢圓組合管并進行試驗,并與數(shù)值模擬結(jié)果對比。結(jié)果表明:試驗值小于模擬值,壓差在10~100kPa范圍內(nèi),正向流量試驗值與模擬值最大相差12郾6%,反向流量兩者最大相差5郾3%;壓差為50kPa時,兩者的姿值分別為1郾83和1郾97,相差7郾65%。關(guān)鍵詞:壓電泵搖橢圓組合管搖數(shù)值模擬搖正交試驗中圖分類號:S277郾9;TH38文獻標識碼:A文章編號:100
3、0鄄1298(2013)09鄄0284鄄05OrthogonalOptimizationDesignandExperimentofOvalCompositeTubeinValvelessPiezoelectricPump1222DengZhidan搖HeXiuhua搖YangSong搖LiFu(1.FacultyofScience,JiangsuUniversity,Zhenjiang212013,China2.SchoolofEnergyandPowerEngineering,JiangsuUniversity,Zhenjiang212013,Chin
4、a)Abstract:Inordertoimprovethecharacteristicsofflowresistanceinthevalvelesspiezoelectricpump,amicro鄄flowtubecalledovalcompositewaspresented.It爺sakindofthree鄄waytube,ofwhichbranchtubewascomposedofovalnozzle/diffuserelementsandconvergingtubewascomposedoftraditionalnozzle/diffuserel
5、ements.Inthenumericalsimulation,theorthogonaloptimizationwasappliedtoobtainparametersoftheproposedtube.Theminimumwidthofconvergingtubedwas150滋mandthedepthofthetubeHwas150滋m.Theoptimizationresultsshowedthatwhenthepressuredifferencebetweentheinletandoutletwasfixedat50kPa,thehighest
6、coefficientofpositiveandnegativeflowresistance姿wasachievedwithoptimizationparametersofr=75滋m,L=3000滋m,茲=7毅,酌=80毅,a=1000滋m,b=450滋m.Then,theoptimizedcompositetubeswereproducedthoughMEMSprocessingtechnologyandtheexperimentswerecarriedoutandcomparedwiththenumericalsimulations.Theresu
7、ltsshowedthattheexperimentalvaluewaslessthansimulatedvaluewithpressuredifferenceof10~100kPa.Thepositivelargestmassflowdifferencebetweentheexperimentandsimulationwas12郾6%,andthenegativewas5郾3%.Whenthepressuredifferencewas50kPa,姿was1郾83(positive)and1郾97(negative)withdifferenceof7郾6
8、5%.Keywords:Piezoelectricpump搖Ovalcompos
