温度对双圆弧斜齿齿轮泵性能的数值模拟研究.pdfVIP

温度对双圆弧斜齿齿轮泵性能的数值模拟研究

摘要：双圆弧斜齿齿轮泵在高速工况下，其内部流场温度升高现象明显，对齿轮泵的性能产生不利影响。为了探究温度对齿轮泵

性能的影响,建立了双圆弧斜齿齿轮泵容积效率与温度的数学模型。利用动网格技术,通过PumpLinx设定不同人口温度,模拟不同

工况下齿轮泵内部流场的变化情况。结果表明：入口油液的温度不同,其内部流场温度变化明显，入口温度越高,其温升现象越明显；

温升严重区域为存在压差区域，且压差越大温升越明显；温度升高，内部流场空化现象明显减弱；相对于常温油液情况下，人口油液温

度为60℃时，齿轮泵流量脉动和流量脉动率明显增大,泵的出口脉动率增加了4.74%，泵出口平均流量降低了1.52L/min,泵的容积

效率降低了3.04%，温度的升高对齿轮泵性能产生了不利影响,验证了温度与容积效率数学模型的正确性。

关键词：双圆弧斜齿齿轮泵；温升效应；数值模拟；容积效率；空化特性

NumericalSimulationofTemperatureonthePerformanceof

DoubleArcHelicalGearPump

Abstract:Theinternalflowfieldtemperatureofdoublecirculararchelicalgearpumpincreasesobviouslyathighspeed,whichhasadverse

effectontheperformanceofgearpump.Inordertoexploretheinfluenceoftemperatureontheperformanceofgearpump,themathematical

modelofvolumeefficiencyandtemperatureofdoublearchelicalgearpumpisestablished.Usingdynamicmeshtechnology,differentinlet

temperaturesaresetbyPumpLinxtosimulatethechangesofinternalflowfieldofgearpumpunderdifferentworkingconditions.Theresults

showthatthetemperatureoftheinletoilisdifferent,andthetemperatureoftheinternalflowfieldchangesobviously.Thehighertheinlet

temperature,themoreobviousthetemperaturerise.Theserioustemperatureriseareaisthepressuredifferencearea,andthegreaterthe

pressuredifference,themoreobviousthetemperaturerise;withtheincreaseoftemperature,thecavitationofinternalflowfieldisobviously

weakened.Comparedwiththecaseofnormaltemperatureoil,whentheinletoiltemperatureis60C,theflowpulsationandflowpulsationrate

ofthegearpumpincreaseobviously,theoutletpulsationrateofthepumpincreasesby4.74%,theaverageflowrateofthepumpoutlet

decreasesby1.52L/min,andthevolumetricefficiencyofthepumpdecreasesby3.04%.Theincreaseoftemperaturehasanadverseeffect

on