铂莱娱乐场

I.Analysisandtroubleshootingofcommonfaultsinhydraulicpumps

a,failurephenomenon:nooil,insufficientinfusion,pressuredoesnotgo

Faultanalysis:1.Themotorisnotturningright,2.Thesuctionpipeorfilterisclogged,3.Theaxialclearanceorradialclearanceistoolarge,4.Theconnectionisleaking,mixedwithair,5.Themediumviscosityistoohighorthetemperatureriseistoohigh..

Remedy:1.Checkthemotorsteering,2.Unblockthepipeline,cleanthefilter,replacethenewworkingmedium,3.Checkandreplacetherelevantparts,4.Tightenthescrewsateachjointtoavoidleakage,andpreventairfromentering,5.CorrectUseworkingmediumtocontroltemperaturerise.

b, failure phenomenon: noise, severe pressure fluctuations

铂莱娱乐场Fault analysis: 1. The suction pipe and filter are blocked or the filter capacity is small. 2. The air suction pipe seal leaks or there is air bubble in the medium. 3. The pump is not concentric with the coupling, 4. The oil level is low, 5. Oil Low temperature or high viscosity, 6. Pump bearing damage.

Remedy: 1. Clean the filter to make the suction pipe unobstructed, and select the filter correctly. 2. Add some oil to the joint or seal. If the noise is reduced, tighten the joint or replace the seal; the return pipe should be in the oil. Below, there must be a certain distance from the oil suction pipe, 3. Adjust the concentricity, 4. Refueling liquid, 5. Heat the oil to the appropriate temperature, 6. Check (hand touch) the temperature rise of the pump bearing part.

c,failurephenomenon:pumpshaftoilsealleakage

铂莱娱乐场Faultanalysis:Theliquidleakageoftheoilleakagepipelineistoolarge,sothatthepressureinsidethepumpbodyrisestoexceedtheallowablepressurevalueoftheoilseal.

铂莱娱乐场Remedy:Checkifthedrainportonthepumpbodyoftheplungerpumpisconnectedtothetankdirectlywithaseparateoilpipe.Ifitisfoundthattheleakageoilpipesofseveralplungerpumpsareconnectedinparalleltoacommonpipeofthesamediameterandthenconnectedtothefueltank,orthedrainpipeofthepistonpumpisconnectedtothereturnpipe,itshouldbecorrected.Itisbesttoconnectapressuregaugetothepumpleakporttocheckthepressureinsidethepump,whichshouldbelessthan0.08Mpa.

Second,thefailureanalysisandtroubleshootingofthereliefvalve

铂莱娱乐场a,failurephenomenon:pressurefluctuations

铂莱娱乐场Faultanalysis:1.Thespringisbentortoosoft,2.Theconevalveisinpoorcontactwiththevalveseat,3.Thesteelballandthevalveseatareinpoorcontact,4.Theslidingvalveisdeformedorpulled,5.Theoilisnotclean,andthedampingholeisblocked.

铂莱娱乐场Remedy:1.Replacethespring,2.Iftheconevalveisnew,removetheadjustingnutandpushtheguiderodafewtimestomakeitcontactwell;orreplacetheconevalve,3.Checktheroundnessofthesteelball,replacethesteelball,grindingthevalveseat,4.replacingorrepairingtheslidevalve,5.dredgingtheorificeandreplacingthecleaningfluid.

铂莱娱乐场b,failurephenomenon:adjustmentisinvalid

Faultanalysis:1.Thespringisbrokenormissing,2.Thedampingholeisblocked,3.Theslidingvalveisstuck,4.Theinletandoutletportsarereversed,and5.Theconevalveismissing.

Remedy:1.Check,replaceorreplenishthespring,2.Unblocktheorifice,3.Remove,inspect,trim,4.Checkthedirectionoftheoilsource,5.Checkandrefill.

c,failurephenomenon:seriousleakage

Faultanalysis:1.Thecontactbetweentheconevalveorthesteelballandthevalveseatispoor,2.Theclearancebetweentheslidevalveandthevalvebodyistoolarge,3.Thepipejointisnottightened,4.Thesealisbroken.

Remedy:1.Replacethenewconevalveorsteelballwhentheconevalveorsteelballisworn.2.Checkthegapbetweenthevalvecoreandthevalvebody.3.Tightenthecouplingscrew.4.Checkandreplacetheseal.

d,faultphenomenon:noiseandvibration

铂莱娱乐场Faultanalysis:1.Thenutisloose,2.Thespringisdeformed,itisnotrestored,3.Thespoolvalveistootight,4.Themainspoolvalveisnotworkingwell,5.Theconevalveisworn,6.Thereisairintheoilpassage,7.Theflowrateexceedstheallowablevalue,8.Resonancewithothervalves.

Remedy:1.Tightenthenut,2.Checkandreplacethespring,3.Repairtheslidevalvetomakeitflexible,4.Checktheconcentricityoftheslidevalveandthehousing,5.Changetheconevalve.

Third,thefailureanalysisandtroubleshootingofthepressurereducingvalve

铂莱娱乐场a.Faultphenomenon:unstablepressurefluctuation

铂莱娱乐场Faultanalysis:1.Airismixedintotheoil.2.Theorificeissometimesblocked.3.Theroundnessofthespoolandthevalvebodyexceedsthespecifiedvalue,sothatthevalveisstuck.4.Thespringisdeformedorstuckinthespool.Thevalveisdifficulttomoveorthespringistoosoft.5.Thesteelballisnotround,thesteelballisnotwellmatchedwiththevalveseatortheconevalveisnotinstalledcorrectly.

铂莱娱乐场Remedy:1.Eliminateairinoil,2.Cleanthedampinghole,3.Repairthevalveholeandslidevalve,4.Replacethespring,5.Replacethesteelballordisassembletheconevalvetoadjust.

铂莱娱乐场b,failurephenomenon:secondarypressureriseisnothigh

Faultanalysis:1,externalleakage,2,poorcontactbetweentheconevalveandthevalveseat.

Remedy:1.Replacetheseals,tightenthescrews,andensurethetorqueiseven,2,repairorreplace.

c,failurephenomenon:nodecompression

Faultanalysis:1.Thedrainportisunreachable;thedrainpipeisconnectedtotheoilreturnpipeandhastheoilreturnpressure.2.Themainspoolisstuckinthefullyopenposition.

铂莱娱乐场Remedy:1.Thedrainpipemustbeseparatedfromtheoilreturnpipeandreturnedtothefueltankseparately.2.Repairandreplacethepartsandchecktheoilquality.

Fourth,thefailureanalysisandtroubleshootingmethodofthrottlespeedcontrolvalve

铂莱娱乐场a,failurephenomenon:throttlingeffectfailureandspeedregulationrangeisnotlarge

Faultanalysis:1.Thegapbetweenthethrottlevalveandtheholeistoolarge,thereisleakageandinternalleakageofthesystem,2.Theorificeisblockedorthespoolisstuck.

铂莱娱乐场Remedy:1.Checkthedamageofthepartsintheleakingpart,repairandupdateit,payattentiontotheoilsealofthejoint.

2.Disassemblethecleaningandreplacethenewoiltomakethespoolmoveflexibly.

b,failurephenomenon:themovementspeedisunstable,suchasgraduallyslowingdown,suddenlyincreasingandbeating

Faultanalysis:1.Theimpuritiesintheoiladheretotheedgeofthethrottle,thecrosssectionoftheoilisreduced,sothatthespeedissloweddown,2.Theperformanceofthethrottlevalveispoor,andtheadjustmentpositionischangedduetovibrationduringlowspeedmovement.Internalandexternalleakageofthethrottlevalve.4.Inthesimplifiedthrottlevalve,thespeedchangessuddenlyduetochangesinthesystemload.5.Theoiltemperaturerises,theviscosityoftheoildecreases,andthespeedisgraduallyincreased.6.DampingThedeviceisclogged,thereisairinthesystem,andpressurechangesandjittersoccur.

Remedy:1.Disassembleandcleantherelevantparts,replacethenewoil,andkeeptheoilclean.2.Increasethethrottleinterlockingdevice.3.Checktheaccuracyandmatchingclearanceoftheparts.Repairorreplacethepartsthatareoutoftolerance.Itisnecessarytostrictlyclose,4.Checkthefunctionofthesystempressureanddecompressiondeviceandthecontrolofthereliefvalve.5.Afterthehydraulicsystemisstable,adjustthethrottlevalveorincreasetheoiltemperatureandheatdissipationdevice.6.Cleantheparts.Anexhaustvalveisaddedtothesystemtokeeptheoilclean.

铂莱娱乐场V.Faultanalysisandeliminationofthereversingvalve

a,faultphenomenon:thespooldoesnotreverse

Faultanalysis:1,theslidevalveisstuck,2,thevalvebodyisdeformed,3,thecenteringspringwiththeintermediatepositionisbroken,4,theoperatingpressureisnotenough,5,theelectromagnetcoilisburntoutortheelectromagnetisinsufficientlythrust,6,theelectriccircuitFailure,7,thehydrauliccontrolvalvetocontroltheoilcircuitisoil-freeorblocked

Remedy:1.Disassembleandcleanthedirtanddeburr.2.Adjustthevalvebodytoinstallthescrewtomakethepressuretight,evenlyorrepairthevalvehole.3.Replacethespring.4.Theoperatingpressuremustbegreaterthan0.35Mpa.5.Check.,repair,replacement,6,eliminatethefault,7,checkthereasonsandeliminate.

b.Faultphenomenon:thereisasoundwhenthedirectionalvalvecontrolledbytheelectromagnetacts

Faultanalysis:1.Theslidevalveisstuckorthefrictionistoolarge.2.Theelectromagnetcannotbepressedtothebottom.3.Thecontactsurfaceoftheelectromagnetcoreisnotflatorthecontactispoor.

Remedy:1.Repairoradjusttheslidevalve,2.Correcttheheightoftheelectromagnet,3.Eliminatedirtandcorrecttheelectromagnetcore.

6.Faultanalysisandeliminationofhydrauliccontrolcheckvalve

铂莱娱乐场a,failurephenomenon:oildoesnotflowbackwards

铂莱娱乐场Faultanalysis:1.Thecontrolpressureistoolow.2.Theoilleakageofthecontroloilpipejointisserious.3.Thecheckvalveisstuck.

铂莱娱乐场Remedy:1.Increasethecontrolpressuretoachievetherequiredvalue.2.Fastenthejointtoeliminateoilleakage.3.Clean.

b,failurephenomenon:nosealinginthereversedirection,thereisleakage

Faultanalysis:1.Thecheckvalveisstuckinthefullyopenposition.2.Thecontactsurfaceofthecheckvalveisnotuniformwiththeconesurfaceofthevalveseat.

铂莱娱乐场Remedy:1,repair,cleaning,2,repairorreplacement.

Seven,theoiltemperatureistoohighfailureanalysisandtroubleshooting

铂莱娱乐场a,faultphenomenon:whenthesystemdoesnotneedpressureoil,andtheoilstilloverflowstothetankunderthesetpressureofthereliefvalve

铂莱娱乐场Faultanalysis:Pooroperationoftheunloadingcircuit.

Remedy:Checktheoperationoftheelectricalcircuit,solenoidvalve,pilotcircuitandunloadingvalve.

b,failurephenomenon:theselectionofhydrauliccomponentsisunreasonable

铂莱娱乐场Faultanalysis:1,thevalvesizeistoosmall,theenergylossistoolarge,2,whenthepumpisselected,thepumpflowistoolarge.

Exclusionmethod:1.Accordingtotheworkingpressureofthesystemandthemaximumflowratethroughthevalve,2.Selectthepumpreasonably.

c,failurephenomenon:insufficientcooling

Faultanalysis:1.Thecoolingwatersupplyisoutoforderorthefanisoutoforder.2.Thereisprecipitationinthecoolingwaterpipeline.

Remedy:1,eliminatethefault,2,eliminateprecipitation.

d,failurephenomenon:insufficientheatdissipation

铂莱娱乐场Faultanalysis:Theheatdissipationareaofthefueltankisinsufficient.

铂莱娱乐场Remedy:Refitthecoolingsystemorincreasethetankcapacityandheatdissipationarea.

铂莱娱乐场e,failurephenomenon:hydraulicpumpoverheating

铂莱娱乐场Faultanalysis:1.Powerlossduetowear,2.Workwithoilwithtoolowortoohighviscosity.

Remedy:1,repairorreplace,2,selecttheoilsuitablefortheviscosityofthesystem.

铂莱娱乐场f,failurephenomenon:oilcirculationistoofast

铂莱娱乐场Faultanalysis:Theliquidlevelinthetankistoolow.

铂莱娱乐场Remedy:Addtheoiltotherecommendedlocation.

g,failurephenomenon:excessiveresistanceofoil

Failureanalysis:Theinsidediameterofthepipeisnotcompatiblewiththerequiredflowrateorbecausetheinnerdiameterofthevalveisnotlargeenough.

Remedy:Installpipesandvalvesofappropriatesizeorreducepower.

铂莱娱乐场Eight,hydrauliccylindercommonfaultanalysisandtroubleshooting

a,failurephenomenon:crawling

Faultanalysis:1,airintrusion,2,hydrauliccylinderendcapsealringistootightortooloose,3,pistonrodandpistonarenotthesame,4,thepistonrodfulllengthorpartialbending,5,hydrauliccylinderinstallationpositionOffset,6,thehydrauliccylinderboreisnotlinear(drumtaper,etc.),7,thecylindercorrosion,pulling,8,thedoublepistonrodnutistootight,makingitconcentric.

Exclusionmethod:1.Addexhaustdevice;ifthereisnoexhaustdevice,thehydraulicsystemcanbestartedtomaketheworkingpartmovequicklywithmaximumstroke,forciblyremovetheair.2.Adjustthesealingringsothatitisnottightandthepistonrodcanbeensured.Pullbacksmoothlybyhandwithoutleakage(mostlyallowasmallamountofoilseepage),3,correcttheconcentricityofthetwo,4,straightenthepistonrod,5,checktheparallelismofthehydrauliccylinderandtheguiderailandcorrect,6,honingrepairRe-matchingthepiston,7,slightrepairofrustandburrs,severelymustbehoned,8,thenutshouldnotbetightenedtootight,generallyhandtightenedtokeepthepistonrodinanaturalstate.

铂莱娱乐场b,failurephenomenon:impact

铂莱娱乐场Faultanalysis:1.Thepistonandhydrauliccylindersealedbythegaparetoolarge,thethrottlevalvelosesthethrottlingeffect,andthecheckvalveoftheendbufferfails,andthebufferdoesnotwork.

Remedy:1.Accordingtotheregulations,theclearancebetweenthepistonandthehydrauliccylinderismatchedtoreducetheleakagephenomenon.2.Thecheckvalveandthevalveseataremodified.

c,failurephenomenon:insufficientthrustorworkingspeedgraduallydeclineorevenstop

铂莱娱乐场Faultanalysis:1.TheclearancebetweenthehydrauliccylinderandthepistonistoolargeortheO-ringisdamaged,causingthehighandlowpressurechamberstocommunicatewitheachother.2.Duetotheuseofacertainsectionoftheworkingstroke,thehydrauliccylinderboreispoorlylinear(partialdrums)Shape),causingthehighandlowpressureoilsatbothendsofthehydrauliccylindertocommunicatewitheachother.3.Theoilsealatthecylinderendispressedtootightlyorthepistonrodisbent,sothatthefrictionorresistanceisincreased.4.Theleakageisexcessive.5.Theoiltemperatureistoohighandtheviscosityisreduced.Thespeedofthecylinderthatisintermittentlysealedorpoorlysealedissloweddown.Ifthehighandlowpressureoilchambersatbothendsofthehydrauliccylindercommunicatewitheachother,therunningspeedwillgraduallyslowdownuntilitstops.

铂莱娱乐场Remedy:1.IntermittentreplacementofpistonandhydrauliccylinderwithO-ringseal,2.Honingandrepairinghydrauliccylinderbore,singlepiston,3,looseoilseal,straightpistonrodwithoutoilleakage,4Findleaksandtightenthejoints.5.Analyzethecauseofheatandtrytocooldown.Ifthesealgapistoolarge,useapistonoraddasealring.