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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.Usuallyapumpreferstothe
2、mechanicalmeanstomoveincompressible(ornearlyincompressible)fluidorliquid.Pumpsareourearliestmachineandaretothisdayoneofourmostnumerousmechanicaldevices.Pumpsareaveryessentialpartoftheoilandgasindustry.Theyareusedthroughouttheindustry,fromdrillingoperationsthroughtofin
3、aldeliverytothecustomer.3.3.1ClassificationsPumpsareclassifiedintotwobasicclasses,displacementanddynamics.Themostwidelyusedpumpsintheoilandgasindustry———————————————————————————————————————————————arereciprocatingdisplacementpumps(inparticularpistonplungertype),therot
4、arydisplacementpump,andthecentrifugaldynamicpump.Onlythesepumpswillbediscussedindetail.Thereciprocatingandrotarypositivedisplacementpumpsprimarycharacteristicisthattheyhaveanearlydirectrelationshipbetweenthemotionofthepumpingelementsandthequantityofliquidpumped.Thus,i
5、npositivedisplacementpumpsliquiddisplacement(ordischargefromthedevice)istheoreticallyequaltothesweptvolumeofthepumpingelement.Figure3.3.3showsthetypicalpositivedisplacementplotofdischargerateQ(ft3/s)versuspressureP(lbs/ft2)[3].Thedischargerateremainsthesame(assumingac
6、onstantrateofrotationforthesystem)regardlessofthepressureintheflow.Thepressureintheflowis,ofcourse,theresultofresistanceintheflowsystemthepumpdischargesto.Iftheresistanceincreases,rotationcanbemaintainedandmoreforceappliedtoeachstrokeofthepump(i.e.,power).Thisiswhythe
7、reciprocatingpistonplungerpumpisalsocalledapowerpump.Inpractice,pressuredoeshavesomeinfluenceonthecapacityofthesepumps.Thisisbecauseasthepressureincreases,thereissomeleakageofthesealsinthesystem.Thisleakageis———————————————————————————————————————————————somewhatpropo
8、rtionaltothepressure,particularlybeyondsomecharacteristicpressurerelatedtotheseals.Thedifferencebetweentheoreticalflowandthe
