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1、西北工業(yè)大學碩士學位論文Abstr掃CtAbstractFuelPun1pandlubepumpusedinpresentaero一engineandsp即e一engineareorientedtosmallervolume，biggerfluxandhigherPressure.Theydifersmuchftomthetradi〔ionalhydraultcelementbothinmecl、anicsandlnPrincipleThefreshthoughtandcutemethodusedinthesePumPsmakethemworkbetteran
2、dcontributemoretotheoPerationofthefulesystem.Thus，itisofmuchindlsPensabilitytofind0以thenewideasandexclusivemechanics.struc皿eandPerformanceofasCrewcentrifugalpumpusedinaero一enginewasdiscussedinthisPape仁AndthecalculationmethodofthepumP，sPerformancewasalsogivenout‘ThopaperbeginsWiththe
3、discuSsionoftheQPeratingPrinclPIeand丘ulctlonofthescrewinducer，sPecialelementofthePumP，andthengivesthedefinitionandrelationshlpofthePar翻etrs眼dthecurveh”Ictionof阮induceraswe[1，whlchlsofgreaT1mportancetodataanalyzingandPumP一manul五cturingByPresentingthesimPlifiedflowmodel，theflowandvelo
4、citytrianglesWereanalyzed-Inthep即er，theauthorexcava沈dtheperformance，cal偽latedthevelocity，Pressureandflowloss0fthewormshell，theoutletelementofthePumpAccordingtothecommonmethodofthePerformancecalculatlonofcentrifugalpump，由eauthorcalculatedtheheadandpoWerofthepump，showedthe從’ayto邵ttheP
5、ressuxeoftheoutlet.Andtheallthoralsoindicatedthe1n1Pactofthestructureparametersandthusguidedthedesignofthe訓mp-Theresu1tsshowthatthescrewcentrifugalP皿p主satyPeofwell一workingPumPwithgoodPerformanceIthashigherheadandeficiencywithbeterabilityofanti一erosion.BoththeParametersandtheworkingc
6、onditioncanafectthePtnP，5operationalldPerform助cedirectl丫ltisausefulwaytoohangetheseParamete巧tomecttheneedoftheengineering.[城卿。rdslscrewcentrifuga飛pump;screwinducer;wormshellPerfonnallcecalculation，0/...................西北工業(yè)大學碩上學位論文符號說明符號說明符號說明川泵進口壓力PZ泵出口壓力Q泵體積流量Llh風螺旋葉輪進口半徑用m凡螺旋葉輪出口半
7、徑mmL螺旋葉輪長度m功氣螺旋葉片螺距mm滬度螺旋葉片最大包角2度螺旋葉片傾角5螺旋葉片厚度mm凡泵底面厚度mm￡度螺旋輪心錐體半角1度螺旋輪心錐體長度螺旋輪心錐體半徑mm螺旋葉片的螺旋升角轉速r/min甄螺旋輪中液體的軸向速度加/s氣螺旋輪中液體的徑向速度m/s氣攻角幾螺旋輪進口液流角氏螺旋輪進口外徑處葉片安裝角III西北工業(yè)大學碩I-學位論文符號說明CkP汽蝕比轉速九流量系數入'PS月誘導輪氣蝕余量Rd輪毅比氣蝕系數b,mm離心葉片出口處寬度離心葉片出口半徑mm水力效率容積效率泵的總效率K,.,,離心葉輪葉片出口排擠系數離心葉輪有限葉片系數離心葉片個數2螺
8、旋輪的縱向高度mm氣離心葉輪進口半徑嫩
