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When the mass of the hydraulic cylinder is large or the load is large, and the moving speed is high (>12m/s), it has a large momentum due to the large inertial force. In this case, when the piston moves to the end of the cylinder, it will mechanically collide with the end cover, which will cause great impact and noise. The weight will affect the machining accuracy and even cause destructive accidents. Therefore, in large, high-speed or high-speed In high-precision hydraulic equipment, a buffer device is often provided, the purpose of which is to increase the oil return resistance when the piston approaches the terminal, thereby slowing down the moving speed of the moving parts and avoiding hitting the end cover of the hydraulic cylinder.
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Howtorepairvarioushydraulicstations  ①Thematerialscrapsextrudedfromthescratchedgroovewillbeembeddedintheseal.Duringoperation,whiledamagingtheworkingpartoftheseal,itmaycausenewscratchesinthescratchedarea.  ②Deterioratethesurfaceroughnessoftheinnerwallofthecylinder,increasefriction,andeasilycausecreeping.  ③Increasetheinternalleakageofthehydrauliccylinderandreducetheworkingefficiencyofthehydrauliccylinder.Themaincausesofscratchesontheboresurfaceofthecylinderareasfollows.  Thehydrauliccylinderisrepairedwiththenumber"139,themiddlefourdigitsare4009,andthebackis5915"  (1)Scarscausedwhenassemblinghydrauliccylinders  (2)Notseriousrunningwearmarks  (3)Thereisforeignmattermixedinthecylinderbody.Thetraditionalrepairmethodistoremovethedamagedpartsforoutsourcingrepair,orperformbrushplatingoroverallsurfacescraping.Therepaircycleofhydrauliccylindersislong.,Therepaircostishigh.
Answer
Howtoextendtheusetimeofthecylinder?Thereareseveralkeypointsinthemaintenanceofthehydrauliccylindersystem:  1.Keepthehydraulicoilclean.Dirtintheoilcandamagethecomponentsofthesystem.  2,keepthehydraulicoilvolume.Ifthereislessoil,airwillenterandthesystemwillnotoperatenormally.  3.Payattentiontoobservewhetherthereisoilleakageinthecylinder.Oilleakageindicatesthatthesealisbroken,andifitisnotreplacedintime,itnotonlyconsumesoil,butalsoreducestheoutput,anditdoesnotactinseverecases.  4.Familiarwiththesoundofsystemoperation.Normalandfaultysoundsaredifferent.Ifyouhearabnormalsounds,youwillknowthatthereissomethingwrong,andremoveitintimetopreventminorfaultsfrombecomingmajordamagesandcausingmajorlosses.  5.Payattentiontocheckwhetherthetightpartsareloose.Tomaintainitseffectivetightfailurestate.  Theuseofhydrauliccylindersisverycommon,andiswidelycitedinmechanicalequipment.O-ringsarethemosteasilydamagedcylinders.Whenthe"O"sealsofthecylinderswearout,thegapbetweentherodcavityandtherodlesscavityofthecylinderincreases,whichisequivalenttocuttingofftheoilreturnpathofthecylinderrodcavity.Inpractice,duetothegapbetweenthetwochambersofthecylinder,thepressureoilinthecylinderchambertendstoflowfromthehighpressureareatothelowpressurearea.Oncetheflowoccurs,thepistonlosesbalanceandmovestotherodchambertofindanewbalancepoint.Inthisreciprocation,thepistonwillnotstopuntilitisblockedbyexternalforce.Theoccurrenceoftheabovephenomenonhasagreatimpactontheoperationofthehydraulicsystem.Afterreplacingthe"O"-shapedsealingringofthecylinderpiston,theunstableoperationofthecylindercanbecompletelyimproved.Atthesametime,itcangreatlyextendtheservicelifeofthecylinder.
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