收縮管-擴(kuò)張管型無(wú)閥壓電泵的研究.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文收縮管擴(kuò)張管型無(wú)閥壓電泵的研究姓名：袁又春申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：機(jī)械設(shè)計(jì)及理論指導(dǎo)教師：黃衛(wèi)清20061201收縮管擴(kuò)張管型無(wú)閥壓電泵的研究iiAbstractThePiezoelectricpumpisanovelfluidpumpwhichutilizesthevirationgeneratedbythepiezoelectricactuattomakeliquidflowinaonewayproduc

2、egydraulicpressure.Piezoelectricpumphassimpleconstructionitgetswidelyapplicationsinthefieldofaeronauticsastronauticsrobotcarmedicalapparatuscreaturegeicengineeringmicromachineetc.Aconventionalpiezoelectricpumpconsistsoft

3、wopassivecheckvalvesconnectedtoanoscillatingdiaphragmwhichcreatesaonewayfluidflow.Thiskindofpumphasaratherlowwkingfrequencybecauseoftheinertiaofthepump’sactionelements.Itsflowrateisalsofluctuatingwithvariationofthechambe

4、rvolume.Furthermemovablepartsofthecheckvalvesmaysufferfromproblemssuchaswearfatigue.Thismayresultinreducedlifetimereliability.Thereisalsotheriskthatthevalveactionmaycausedamagetosomesensitivefluids.Laterwehadanewprincipl

5、eusingthedifferentflowpropertiesofadiffuseranozzle.Theflowdirectingdiffusernozzleelementshavenomovableparts.Thepump’slifetimereliabilityishigherthantheconventionalonebecausethattheactuatdrivemechanismpumpbodymaybefabrica

6、tedintegrallymeoverithasotheradvantagessuchasstructuresimplefabricationcostslowminiaturizationeasy.BasedontheresearchofprimaryacteristicsofvalvelesspumpweputfwardsanewkindofNozzlediffusersvalvelesspiezoelectricpumpfabric

7、ateamachinemakesomeexperimentalresearches.theflowinavalvelesspumpchamberisstudied.1、BasedontheresearchresultsofoutinthispaperputsfwardsanewkindofNozzlediffusersvalvelesspiezoelectricpump.Weusethecrelativehydromechanicalk

8、nowledgetoanalyzewkingprincipleofthepiezoelectricpumpobtainacalculationfmulafpiezoelectricpump’stheydisge.2、Themathematicalmodelofthediffusernozzlewasbuilt.Throughthefiniteelementmethodanalysistotheflowchannelbythesoftwa