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1、中国机械工程第２８卷第３期２０１７年２月上半月含气油液有效体积弹性模量理论模型研究唐东林１１２１吴凡贾品元曾志春１．西南石油大学机电工程学院,成都,６１０５００２．中国石油长庆油田公司第五采油厂,西安,７１００２０摘要:为准确预测含气油液在空气分离压下有效体积弹性模量的值,基于油液体积弹性模量定义和质量守恒定律,依据含气油液中气相成分随压力的变化过程,推导出含气油液有效体积弹性模量理论模型.数值计算结果表明:含气油液有效体积弹性模量理论模型B?p曲线与现有理论模型及实验数据拟合曲线基本吻合,验证了理论模型的正确性,
2、特别是在低于大气压的极低压区,有效体积弹性模量预测值更加接近实际情况.分析了初始含气量、压力、升压时间对有效体积弹性模量的影响,结果表明:在低于空气分离压范围内,初始含气量增大,有效体积弹性模量减小;在一定范围内,升压时间增大,有效体积弹性模量小幅度增大.关键词:液压油液;有效体积弹性模量;初始含气量;空气分离压;升压时间中图分类号:TH１３７DOI:１０．３９６９/ji．ssn．１００４?１３２X．２０１７．０３．００８ResearchonTheoreticalModelforEffectiveBulkModul
3、usofAir?liquidMixturesofHydraulicOil１１２１TANGDonglinWUFanJIAPinyuanZENGZhichun１．SchoolofMechanicalandElectricalEngineering,SouthwestPetroleumUniversity,Chengdu,６１０５００２．No．５OilProductionofPetroChinaChangqingOilFieldCompany,Xi?an,７１００２０Abstract:Inordertopredictth
4、eeffectivebulkmodulusofair?liquidmixturesofhydraulicoilbeＧlowthesaturationpressureaccurately,basedonthedefinitionofthebulkmodulusandlawofmassconservation,accordingtotheairreleaseandcavitationprocesses,atheoreticalmodelforeffectivebulkmodulusofair?liquidmixture
5、sofhydraulicoilbelowthesaturationpressurewasproposed．ThenumericalcalculationresultsshowthattheB?pcurveofthetheoreticalmodelforeffectivebulkmodＧulusofair?liquidmixturesofhydraulicoilshowsgoodagreementwiththeB?pcurvesofpublishedliterature?stheoreticalmodelandfit
6、tedexperimentaldata,verifingtheaccuracyofthetheoreticalmodＧel,especiallytheextremelowpressureregionbelowtheatmosphericpressure．Theeffectivebulkmodulusofair?liquidmixturesofhydraulicoilismoreconsistenttopracticalconditions．Furthermore,theeffectsofinitialaircont
7、ent,pressureandpressurerisingtimeoneffectivebulkmoduluswereanaＧlyzed．Theresultsshowthatbelowthesaturationpressurearea,theeffectivebulkmodulusdeceaseswiththeincreasingofinitialaircontent,andtheeffectivebulkmodulusincreasesinanarrowrangewiththeincreasingofthepre
8、ssurerisingtime．Keywords:hydraulicoil;effectivebulkmodulus;initialaircontent;saturationpressure;presＧsurerisingtime０引言有效体积弹性模量是一个影响因素多且变化液压油液是液压系统的重要组成部分,其属复杂的动态量,其数值大小主要与工作压力、油液性对
