渐开线外啮合齿轮泵的分析与设计

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1、渐开线外啮合齿轮泵的分析与设计AbstractGearpumpisveryimportantinthehydraulicsystem，whichisthepowersourceto锄lll'etheworkofhydraulicsystem．RelativetOtheotherstructureofpump，Gearpumphasadvantageofsimples仃uCture，lightweight，lowprice，simpletobemade，easytomaintenance,Canchangespe

2、edinlargerange，systemisnotsensitivetooilpollution,SOitiswidelyusedinmechanicalsystems．MechanicalengineeringhasalsoraisedalotofnewrequirementstOgearpump，Suchashighpressure，largedisplacement,lowrippleandnoise，SOtheperformanceanalysisandimprovementofthegearpump

3、havebecomeveryimportantsubjects．Inthispaper,1willanalysistheflowcharacteristicsandradialmeshingforceofthegearpumps，andthendealthemwithsomenumericalcalculation,providethenecessarytheoreticalforthedesignofthegearpump．1．Accordingtotheprincipleofinvolutes’format

4、iontOgotthetoothprofileandmeshinglineequation．Analyzedthedegreeofcoincidenceandmeshingslidingofgearmesh2．Calculatedtheflowbetweenintcrdentallyarea,gearmeshingarea,andeventuallytheflowofthegearpump．Gettingthepumpflowratewhendeterminethetimeandspeed．111estruct

5、ureofgearpumphasagreatinfluenceontheinternalflowfield，usingfluentfinitevolumemethodtoestablishingthecalculationmodel；getthepumpdifferentcharacteristicsondifferentCenterdistancesandspeeds．Theresultis：(1)Oilinletpressureislowthanthepressureofoiloutlet,Fluidpre

6、ssurechangesperiodically，trappedoilappearedbetweenthegearmeshingpairs．(2)Thesmaller(bigger)thecenterdistance，thebigger(smaller)theaveragespeedattheexport,andthepressuredifferenceattheimportandexportgetsbigger(smaller)，thetrappedoilpressureishigher(10wer)too；

7、(3)Theexportvelocityandtherotatespeedtakeonalinearlyproportionalrelation．AslightlylargeCenterdistanceCanreducetrappedoilpressure．3．ThroughtheoreticalanalysisCallknowthatthepressurearoundthegearchangesincircumferential．radialforceofhydraulicisasymmetric，andit

8、isVerifiedbynumericalsimulation．DuetOthemeshingofthereisinteractionmeshingforcebetweenthetwogears，thengotthegearsmeshingforceandtorquebycalculate．Analysisgearmeshingstressbythefiniteelementmetho