雨课堂学堂在线学堂云《Hydraulic and Pneumatic Transmission（湖北三峡职业技术学院）》单元测试考核答案

第1题Comparedwithmechanicaltransmission,theadvantageofhydraulictransmissionisthat（

）.AitcanconvenientlyachievesteplessspeedregulationBithashighefficiencyCitrequireslowprocessingaccuracyDitmovessmoothly第2题Sincetheworld'sfirsthydraulicpresswasinvented,hydraulictransmissionhasahistoryofmorethan（

）years.A200B150C100D50第1题Theflowratecalculatedbasedonthegeometricdimensionsofthepumpintheabsenceofleakageiscalledthe（

）.AtheoreticalflowrateBactualflowrateCratedflowrateDdisplacement第2题Intheinternalleakagepathoftheexternalgearpump,thebiggestinfluenceonthevolumetricefficiencyisthe（

）.AaxialclearancebetweenthegearendfaceandtheendcoverBgapleakageofthetoothmeshingpointCradialgapbetweenthetoothtopandtheshellDgapbetweentheshellandtheendcover第3题Thedisplacementofthegearpumpisadjustable.第4题Ingearpumps,toeliminatethephenomenonoftrappedoil,anunloadinggrooveisopenedontheendcoverofthepump.1.3第1题Themovementspeedofthehydrauliccylinderdependsonthe（

）.AflowrateBpressureCintensityofpressureDflowrateandpressure第2题Thesealingqualityofahydrauliccylinderhasnoimpactonitsworkingperformance.1.4第1题M-typemedianfunctionofthereversingvalvecanachievemedianunloading.第2题Allreversingvalvescanbeusedinreversingcircuits.第3题Thenumberofworkingpositionsofadirectionalcontrolvalveiscalled"through".第4题Themiddlepositionofthesolenoidvalveusedasthepilotvalveintheelectro-hydraulicdirectionalcontrolvalveis（

）AYpositionBOpositionCHpositionDMpositionDrawthereversinglooponthesimulationsoftware第1题2.1第1题Therotorofasingle-actingvanepumpsucksoilandpressurizesoil（

）eachtimeitrotates.AonceBtwiceCthreetimesDfourtimes第2题ThebladeinclinationAngleofthedouble-actingvanepumpshouldbe（

）alongtherotationdirectionoftherotor.AinclinedforwardBinclinedbackwardCeitherforwardorbackwardDthesame第3题Thesingle-actingvanepumpcanchangetheoutputflowratebyalteringtheeccentricdistancebetweentherotorcenterandthestatorcenter第4题Eachtimetherotorofthedouble-actingvanepumprotatesonefullcircle,eachsealedvolumecompletestwooilsuctionandoilpressureprocesses.2.2第1题Theflowratecalculatedbasedonthegeometricdimensionsofthepumpintheabsenceofleakageiscalledthe（

）.AtheoreticalflowrateBactualflowrateCratedflowrateDdisplacement2.3第1题Auxiliarycomponentscanbepresentorabsentinthehydraulicsystem.第2题Thereturnoilpipeopeninginthefueltankshouldbecutata（

）toincreasetheflowarea.A45-degreeB30-degreeC60-degreeD80-degree2.4第1题Whenaone-wayvalveisusedasabackpressurevalve,itsspringshouldbereplacedwithasoftspring.第2题Whentheoilportofthehydrauliccontrolone-wayvalvedoesnotpassthroughthepressureoil,itsroleisthesameastheone-wayvalve第3题Aone-wayvalvecanbeusedtochangethedirectionoftheliquidflow.2.5第1题Theoverflowvalveservesasasafetyvalveinthe（

）pumpoilsupplysystem.AvariableBquantitativeCone-wayDbidirectional第2题Theoverflowvalvebelongstothe（

）controlvalve.ApressureBflowCdirectionalDspeed第3题Thepressureattheoiloutletoftheoverflowvalveisthesystempressure.第4题Iftheoverflowvalveisusedasasafetyvalve,itwillremaininanormallyclosedstatewhenthesystemisoperatingnormally.3.1第1题Forauxiliarydevicesofmachinetools(suchasfeedingandclamping),（

）areusuallypreferredashydraulicpumps.AgearpumpsBvanepumpsCplungerpumpsDscrewpumps第2题Plungerpumpscangenerallybeusedas（

）.AvariablepumpsBfixeddisplacementpumpsClow-pressurepumpsDsingle-directionpumps第3题（

）canbeusedinthehydraulicsystemsofmechanicalequipmentwithlargeloadsandhighpower.APlungerpumpsBGearpumpsCVanepumpsDScrewpumps第4题Theplungerhydrauliccylinderisdouble-acting.3.2第1题Thepressurereducingcircuitisusedtoincreasethepressureofacertainbranchinthesystemtobehigherthanthatoftheoilsource.第2题Thesmallerthepressurereducinggapinthepressurereducingvalveis,theweakeritspressurereducingeffectwillbe.第3题Theoilinletpressureofthepressurereducingvalveislowerthantheoiloutletpressure.第4题Liketheoverflowvalve,theoutletpressureofthepressurereducingvalveisequalto0.3.3第1题Thespeedcontrolvalveiscomposedof（

）andapressurereducingvalveinseries.AanadjustablethrottlevalveBaoverflowvalveCapressurereducingvalveDasequencevalve第2题Theflowcontrolvalveisusedtocontroltheworkingflowofthehydraulicsystem,therebycontrolling（

）.AthemovementspeedoftheactuatorBthemovementdirectionoftheactuatorCwhethertheactuatormovesornotDthepressureoftheactuator3.4第1题Themainhydrauliccomponentadoptedinthethrottlingspeedregulationcircuitisthe（

）.AthrottlevalveBsequencevalveCoverflowvalveDcheckvalve第2题Thespeedcontrolvalvecanmeettheoccasionswithhighrequirementsforspeedstability第3题Thespeedcontrolcircuitcomposedoftwospeedregulatingvalvescanonlyconnectthetwovalvesinparallel.第4题Thereisnobackpressureinthebypassthrottlingspeedregulationcircuit.4.1第1题Sequencevalvescanbeusedasoverflowvalves.第2题Theopeningandclosingofthevalvecoreofthehydraulicsequencevalveisnotcontrolledbythepressureattheoilinlet.4.3第1题Acircuitthatusesapressurecontrolvalvetoregulatethepressureofasystemoracertainpartofthesystemiscalled（

）.AapressurecontrolcircuitBaspeedcontrolcircuitCadirectionalcontrolcircuitDasequentialactioncircuit第2题Theunloadingcircuit（

）.Acanreducepowerloss,wearandsystemheatingBcanonlyberealizedbyapressurecontrolvalveCcanenablethesystemtoobtainarelativelylowandstableworkingpressure4.4第1题Thesequentialactioncircuitcanonlyberealizedbythetravelvalve.5.1第1题Thethrottlespeedregulationmethodofthesecondaryfeedoilinletcircuitwithparallelspeedcontrolvalvesadoptedbythepower