Hydraulic seals ua lub luag haujlwm tseem ceeb ntawm kev tiv thaiv kev xau, tswj lub siab, thiab cais cov kab mob hauv cov tshuab hydraulic. Txawm li cas los xij, lawv qhov tseem ceeb feem ntau raug saib xyuas kom txog thaum tsis ua tiav, uas tuaj yeem ua rau lub sijhawm tsis tau npaj tseg, dej poob, thiab txawm tias cov khoom puas tsuaj. Kev txheeb xyuas qhov tseeb ntawm lub hauv paus ua rau lub foob tsis ua haujlwm yog qhov yuav tsum tau ua ua ntej rau kev tiv thaiv thiab kev saib xyuas zoo.
Cov hauv qab no yog tsib lub hauv paus ua rau hydraulic foob tsis ua haujlwm thiab lawv cov kev tiv thaiv sib xws:
1. Kev kis kab mob
Ua rau: Cov khoom siv xws li plua plav, hlau shavings, xeb, lossis noo noo nyob hauv cov kua dej hydraulic.
Failure Mechanisms:
Cov khoom nyuaj embed rau hauv cov khoom foob los yog khawb lub piston pas nrig thiab lub tog raj kheej bore, tsim txoj hauv kev xau;
Cov khoom loj dua ua rau cov qhab nia ntawm lub foob lossis cov mating nto, ua kom nrawm nrawm;
Cov dej noo los yog tshuaj lom neeg ua rau cov khoom foob ua rau o, ntsws, tawv, lossis muag, txo kev sib khi.
Kev Tiv Thaiv Kev Tiv Thaiv:
Ua cov kua dej tsis tu ncua thiab kuaj kev sib kis;
Siv siab- cov khoom lim dej zoo thiab hloov lawv raws sijhawm;
Ua kom zoo reservoir sealing thiab sab hauv huv si;
Ua tib zoo ntxuav cov khoom ua ntej sib dhos;
Nruab wiper seals thiab plua plav kaus mom ntawm lub tog raj kheej pas nrig kawg.
2. Kub kub heev
Ua rau: Kev khiav hauj lwm kub siab tshaj qhov siv tau ntawm cov khoom siv foob, suav nrog qhov kub siab tshaj lossis qis qis.
Failure Mechanisms:
Thaum tsis tshua muaj kub, cov khoom foob hardens thiab poob elasticity, tsis ua raws li cov sealing nto, uas ua rau kom tawg tshwj xeeb tshaj yog thaum pib; mob hnyav tuaj yeem ua rau pob txha tawg;
Thaum kub kub, elastomers muaj hnub nyoog, harden, tawg, los yog undergo oxidative decomposition; cov khoom kuj tseem yuav poob lub peev xwm sealing vim thermal expansion lossis contraction.
Kev Tiv Thaiv Kev Tiv Thaiv:
Txhim kho lub kaw lus nrog cov khoom siv cua txias lossis cua sov kom tswj tau qhov kub thiab txias ua haujlwm;
Xaiv cov ntaub ntawv foob nrog qhov ntsuas kub uas haum rau kev ua haujlwm;
Saib xyuas qhov kub thiab txias ntawm qhov system tam sim ntawd;
Siv cov kua dej hydraulic nrog lub siab viscosity Performance index haum rau ntau qhov kub thiab txias.
3. Chemical Incompatibility
Ua rau: Cov kua dej hydraulic, cov khoom siv ntxiv, lossis cov tshuaj ntxuav cov tshuaj tiv thaiv nrog cov khoom foob.
Failure Mechanisms:
Cov khoom siv foob hloov qhov loj me vim yog nqus dej los yog rho tawm, ua rau o lossis shrinkage;
Lub cev lub cev ntawm cov khoom hloov pauv, ua rau softening, hardening, extrusion, los yog tawg;
Nyob rau hauv cov xwm txheej hnyav, cov khoom yog yaj los yog degraded, ua rau ua tsis tiav.
Kev Tiv Thaiv Kev Tiv Thaiv:
Xaiv cov ntaub ntawv foob sib xws nrog hom tshwj xeeb ntawm cov kua dej hydraulic;
Tsis txhob sib tov ntau hom hydraulic kua;
Siv cov kuab tshuaj ntxuav tau zoo nrog cov khoom siv foob;
Xa mus rau cov chaw tsim khoom- muab cov ntaub ntawv sib raug zoo rau cov khoom siv rau kev xaiv.
4. Kev teeb tsa tsis raug
Ua rau: Kev puas tsuaj los ntawm kev tsis yog- cov txheej txheem txheej txheem, cov cuab yeej tsis raug, lossis kev sib dhos nrawm thaum lub sijhawm teeb tsa.
Failure Mechanisms:
Nthuav cov npoo ntawm lub piston pas nrig los yog lub tog raj kheej tho khawb los yog txiav daim di ncauj;
O-rings los yog di ncauj ntsaws ruaj ruaj yuav twisted mus tas li thaum lub sij hawm installation, tsim txoj kev mus tas li;
Tsis txaus los yog ntau dhau preload ntawm compression - hom ntsaws ruaj ruaj ua rau to los yog extrusion thiab puas;
Kev siv cov cuab yeej uas tsis yog- tshwj xeeb xws li cov ntsia hlau ntsia hlau thaum lub sij hawm sib dhos ua rau muaj kev puas tsuaj.
Kev Tiv Thaiv Kev Tiv Thaiv:
Siv cov cuab yeej tshwj xeeb ntsaws ruaj ruaj;
Chamfer thiab deburr tag nrho cov npoo hlau nyob rau hauv kev sib cuag nrog lub foob;
Ntxuav cov ntsaws ruaj ruaj thiab mating nto ua ntej sib dhos;
Ua raws li cov chaw tsim khoom cov lus qhia kev teeb tsa;
Muab cov txheej txheem installation kev cob qhia rau cov neeg ua haujlwm tu.
5. Kev kub siab dhau los lossis kev kub ntxhov
Ua rau: Lub kaw lus siab tshaj lub foob tsim txwv, los yog nquag hloov siab tshwm sim.
Failure Mechanisms:
Nyob rau hauv kev kub siab, lub foob yog extruded rau hauv clearance qhov khoob, ua rau deformation mus tas li los yog tearing;
Kev kub siab ua ke nrog kev caij tsheb kauj vab siab ua kom muaj kev sib txhuam thiab hnav;
Sudden siab surges tuaj yeem ua rau lub foob tawg.
Kev Tiv Thaiv Kev Tiv Thaiv:
Xaiv cov ntsaws ruaj ruaj rau qhov system qhov siab tshaj plaws ua haujlwm siab, suav nrog cov siab siab siab;
Optimize foob caj pas tsim los tswj kev tshem tawm thiab tiv thaiv extrusion;
Siv cov tshuaj tiv thaiv-extrusion rings hauv siab- kev siv siab;
Tsis tu ncua tshuaj xyuas thiab ntsuas lub siab nyem li qub thiab lwm yam khoom siv tiv thaiv overpressure kom ua haujlwm tau zoo.
Hydraulic seals, txawm hais tias yooj yim structurally, muaj feem cuam tshuam rau kev ntseeg siab. Los ntawm kev xaiv tsim nyog, kev teeb tsa tus qauv, kev tswj hwm ib puag ncig, thiab kev saib xyuas kev ua haujlwm, kev ua haujlwm foob lub neej tuaj yeem txuas ntxiv, txhim kho kev ua haujlwm zoo thiab ruaj khov ntawm tag nrho cov hydraulic system. Kev saib xyuas kom meej pab tiv thaiv teeb meem ua ntej lawv tshwm sim.
