Parker M3000 型沥青混合料搅拌设备磨损件摩擦学分析

ParkerM3000型沥青混合料搅拌设备磨损件摩擦学分析1.IntroductionParkerM3000isanasphaltmixingplantusedforproducinghotmixasphaltforconstructionpurposes.Themixingprocessinvolvestheuseofaggregates,asphaltbinder,andadditives.Themixingcomponentsaresubjectedtoextremewearandtearduetotheabrasivenatureofthematerialsprocessed.ThispaperpresentsafrictionalanalysisofthewearpartsusedintheParkerM3000asphaltmixingplant.2.WearmechanismsinParkerM3000asphaltmixingplantParkerM3000asphaltmixingplanthasseveralwearparts,whichincludethemixingarms,paddles,wearplates,andseals.Thesewearpartsaresubjectedtodifferentwearmechanisms,whicharediscussedbelow:2.1AbrasivewearAbrasivewearisthemostcommontypeofwearobservedintheParkerM3000asphaltplant.Theabrasivewearoccursduetothecontactbetweentheaggregatesandthemixingcomponents.Theaggregatesusedinthemixarecomposedofhardparticlesthatcauseabrasiononthemixingcomponents.Thiswearmechanismresultsinthelossofmaterialonthewearparts,leadingtoareductionintheirdimensionalaccuracy.2.2AdhesivewearAdhesivewearoccurswhentwosurfacesslideagainsteachother,leadingtothetransferofmaterialfromonesurfacetotheother.IntheParkerM3000asphaltmixingplant,adhesivewearoccursduetothecontactbetweenthemixingcomponentsandtheasphaltbinder.Thehightemperatureandpressureconditionsinthemixingchamberfacilitatethetransferofmaterialsfromtheasphaltbindertothemixingcomponents,leadingtomaterialdepositiononthewearparts.2.3FatiguewearFatiguewearoccursduetotherepeatedcyclicstressesexertedonthewearparts.IntheParkerM3000asphaltplant,fatiguewearisobservedinthemixingarmsandpaddles.Thecontinuousrotationofthemixingarmsandpaddlesresultsinstressconcentrationpointswherefatiguecracksstarttodevelop.Overtime,thesecrackspropagate,leadingtothefailureofthewearparts.3.FrictionalanalysisofwearpartsinParkerM3000asphaltmixingplantFrictionalanalysisisatechniqueusedtostudytheinteractionbetweentwosurfacesincontact.Itinvolvesthemeasurementofthecoefficientoffriction,wearvolume,andwearrate.IntheParkerM3000asphaltmixingplant,thefrictionalanalysisofthewearpartsinvolvesthemeasurementofthecontactingsurfaces'roughnessandhardness.3.1RoughnessanalysisTheroughnessanalysisofthewearpartsintheParkerM3000asphaltmixingplantinvolvesthemeasurementofthesurfaceprofiledeviationfromthemeanline.TheroughnessparametersmeasuredincludetheRa,Rq,Rz,andRt.TheRaparameterisusedtomeasuretheaverageroughnessofthesurface,whileRqisusedtomeasuretherootmeansquareroughness.TheRzparametermeasurestheheightofthesurfaceirregularities,whiletheRtparametermeasuresthetotalheightofthesurfaceprofile.TheroughnessanalysisofthemixingarmsandpaddlesintheParkerM3000asphaltmixingplantshowedthatthewearpartshadahighroughnessvalueduetotheabrasivewearmechanism.Theroughnessvaluesweresignificantonthesurfacesexposedtotheaggregates,indicatingthehighabrasivewearrates.3.2HardnessanalysisThehardnessanalysisofthewearpartsintheParkerM3000asphaltmixingplantinvolvesthemeasurementofthematerial'sresistancetopenetration.Thehardnessvaluesmeasureddependonthetypeoftestmethodused,suchasBrinell,Rockwell,orVickershardnesstest.ThehardnessanalysisofthemixingarmsandpaddlesintheParkerM3000asphaltmixingplantshowedthatthewearpartshadahighhardnessvalueduetotheabrasiveandadhesivewearmechanisms.Thehardaggregatesandasphaltbindercausedanincreaseinthehardnessvaluesofthemixingcomponents.4.ConclusionTheParkerM3000asphaltmixingplant'swearpartsundergoseverewearandtearduetotheabrasivenatureofthematerialsprocessed.Theabrasiveandadhesivewearmechanismscausemateriallossonthemixingarms,paddles,andwearplates,leadingtoareductionintheirdimensionalaccuracy.Thefrictionalanalysisofthewearpartsshowedthatthesurfaces'roughnessandhardnessvalueswerehighduetotheabrasiveandadhesivewearmechanisms.