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尺度解析模拟在液力偶合器、液力缓速器和液力变矩器中的应用(英文) ApplicationofScaleAnalysisSimulationinHydraulicCouplers,SpeedReducersandTorqueConverters Thehydrauliccoupler,speedreducerandtorqueconverterarethreecommonlyusedhydrauliccomponentsinmechanicaltransmissionsystems.Theperformanceofthesecomponentsiscloselyrelatedtotheirinternalfluidflowcharacteristics.Therefore,theapplicationofscaleanalysissimulationinthedesignandoptimizationofthesecomponentshasbecomeincreasinglyimportant.Inthispaper,wewilldiscusstheapplicationofscaleanalysissimulationinhydrauliccouplers,speedreducersandtorqueconverters. 1.HydraulicCouplers Hydrauliccouplersaredevicesthattransmitpowerbetweentwoshaftsusingafluidmedium.Theflowofthefluidinthecouplingchamberiscomplexanddynamic,andthepressuredistributionisalsouneven.Inordertooptimizetheperformanceofhydrauliccouplers,itisnecessarytousescaleanalysissimulationtoanalyzethefluidflowcharacteristicsandpressuredistribution. ThescaleanalysissimulationcanbeusedtostudytherelationshipbetweentheReynoldsnumberandthepressuredropinthehydrauliccoupler.ItcanalsohelptodeterminethecriticalReynoldsnumberatwhichthefluidflowchangesfromlaminartoturbulent.Thisinformationisvaluableforoptimizingtheflowcharacteristicsofhydrauliccouplerstoimprovetheirperformance. 2.SpeedReducers Speedreducersaredevicesthatreducethespeedofmotorsandothermechanicaldevicesformoreefficientpowertransmission.Thefluidflowinsidethespeedreduceriscomplexduetoitscompactdesignandthepresenceofsmallclearances.Scaleanalysissimulationcanbeusedtoanalyzethefluidflowcharacteristicsandtooptimizetheperformanceofspeedreducers. ThescaleanalysissimulationcanbeusedtostudytheeffectsoftheReynoldsnumberontheturbulencelevelandthefrictionlossesinthespeedreducer.Theresultsofthescaleanalysissimulationcanbeusedtooptimizethedesignofthespeedreducertoreducefrictionlossesandincreasetheefficiencyofthepowertransmission. 3.TorqueConverters Torqueconvertersaredevicesthatconvertthetorqueoftheenginetooutputtorquethroughafluidcoupling.Thetorqueconverterisacomplexdevi