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1、BW-100型泥浆泵曲轴箱与液力端特性分析设计外文文献原文外文原文毕业设计外文原文《StandardHandbookofPetroleum&NaturalGasEngineering》byLyons,WilliamC.;Plisga,GaryS.Publication:Burlington,MAElsevier,20053.3PUMPSPumpsareamechanicaldevicethatforcesafluidtomovefromonepositiontoanother.Usuallyapumprefer
2、stothemechanicalmeanstomoveincompressible(ornearlyincompressible)fluidorliquid.Pumpsareourearliestmachineandaretothisdayoneofourmostnumerousmechanicaldevices.Pumpsareaveryessentialpartoftheoilandgasindustry.Theyareusedthroughouttheindustry,fromdrillingoperations
3、throughtofinaldeliverytothecustomer.3.3.1ClassificationsPumpsareclassifiedintotwobasicclasses,displacementanddynamics.Themostwidelyusedpumpsintheoilandgasindustry———————————————————————————————————————————————arereciprocatingdisplacementpumps(inparticularpistonp
4、lungertype),therotarydisplacementpump,andthecentrifugaldynamicpump.Onlythesepumpswillbediscussedindetail.Thereciprocatingandrotarypositivedisplacementpumpsprimarycharacteristicisthattheyhaveanearlydirectrelationshipbetweenthemotionofthepumpingelementsandthequant
5、ityofliquidpumped.Thus,inpositivedisplacementpumpsliquiddisplacement(ordischargefromthedevice)istheoreticallyequaltothesweptvolumeofthepumpingelement.Figure3.3.3showsthetypicalpositivedisplacementplotofdischargerateQ(ft3/s)versuspressureP(lbs/ft2)[3].Thedischarg
6、erateremainsthesame(assumingaconstantrateofrotationforthesystem)regardlessofthepressureintheflow.Thepressureintheflowis,ofcourse,theresultofresistanceintheflowsystemthepumpdischargesto.Iftheresistanceincreases,rotationcanbemaintainedandmoreforceappliedtoeachstro
7、keofthepump(i.e.,power).Thisiswhythereciprocatingpistonplungerpumpisalsocalledapowerpump.Inpractice,pressuredoeshavesomeinfluenceonthecapacityofthesepumps.Thisisbecauseasthepressureincreases,thereissomeleakageofthesealsinthesystem.Thisleakageis——————————————————
8、—————————————————————————————somewhatproportionaltothepressure,particularlybeyondsomecharacteristicpressurerelatedtotheseals.Thedifferencebetweentheoreticalflowandthe
