Tom qab lubPOB VALVESyog siv rau lub sij hawm ntev, lub sealing nto ntawm lub valve disc thiab lub rooj zaum valve yuav hnav thiab qhov nruj yuav raug txo.Kev kho lub sealing nto yog ib txoj haujlwm loj thiab tseem ceeb heev.Txoj kev tseem ceeb ntawm kev kho yog kev sib tsoo.Rau qhov hnyav hnyav sealing nto, nws yog surfacing vuam thiab ces sib tsoo tom qab tig.

1 Cov txheej txheem ntxuav thiab tshuaj xyuas

Ntxuav lub sealing nto nyob rau hauv lub lauj kaub roj, siv ib tug kws tu neeg saib xyuas, thiab xyuas qhov kev puas tsuaj ntawm lub sealing nto thaum ntxuav.Cov kab nrib pleb zoo uas nyuaj rau txheeb xyuas nrog qhov muag liab qab tuaj yeem ua tiav los ntawm kev kuaj pom qhov tsis zoo.

Tom qab ntxuav, xyuas qhov nruj ntawm lub disc los yog lub rooj vag valve thiab lub sealing nto ntawm lub rooj zaum valve.Siv liab thiab xaum thaum kuaj xyuas.Siv cov hmoov txhuas los ntsuam xyuas cov xim liab, xyuas qhov kev xav ntawm lub foob kom txiav txim siab qhov nruj ntawm qhov sealing nto;los yog siv ib tug cwj mem los kos ob peb lub voj voog ntawm qhov sib khi ntawm lub valve disc thiab lub rooj zaum valve, thiab tom qab ntawd tig lub valve disc thiab lub rooj zaum valve kom nruj, thiab xyuas cov xaum lub voj voog so tawm qhov xwm txheej kom paub meej tias qhov nruj ntawm qhov. sealing nto.

Yog tias qhov nruj tsis zoo, tus qauv tiaj tus phaj tuaj yeem siv los kuaj xyuas qhov sib khi ntawm lub disc lossis lub rooj vag thiab lub sealing nto ntawm lub valve lub cev raws li kev txiav txim siab txoj haujlwm sib tsoo.

2 txoj kev sib tsoo

Txoj kev sib tsoo yog qhov tseem ceeb ntawm kev txiav yam tsis muaj tshuab dhos.Qhov tob ntawm pitting lossis qhov me me ntawm lub taub hau lub taub hau lossis lub rooj zaum valve feem ntau tsis pub dhau 0.5 hli, thiab txoj kev sib tsoo tuaj yeem siv rau kev saib xyuas.Cov txheej txheem sib tsoo tau muab faib ua ntxhib sib tsoo, sib tsoo nruab nrab thiab sib tsoo zoo.

Kev sib tsoo ntxhib yog txhawm rau tshem tawm qhov tsis xws luag xws li khawb, indentations, thiab cov ntsiab lus corrosion ntawm lub sealing nto, kom lub sealing nto tuaj yeem tau txais qib siab dua ntawm flatness thiab ib co degree ntawm smoothness, thiab nteg lub hauv paus rau nruab nrab sib tsoo ntawm sealing. nto.

Kev sib tsoo ntxhib siv cov cuab yeej sib tsoo lub taub hau lossis cov cuab yeej sib tsoo lub rooj, siv cov ntaub ntawv ntxhib ntxhib los yog ntxhib-grained sib tsoo, nrog rau qhov loj me ntawm 80 #-280 #, ntxhib particle loj, loj txiav ntim, ua haujlwm siab, tab sis sib sib zog nqus cov kab thiab ntxhib sealing nto.Yog li ntawd, kev sib tsoo ntxhib tsuas yog yuav tsum tau ua kom yooj yim tshem tawm cov pitting ntawm lub taub hau valve lossis lub rooj zaum valve.

Kev sib tsoo nruab nrab yog txhawm rau tshem tawm cov kab ntxhib ntawm qhov sib khi thiab txuas ntxiv txhim kho qhov flatness thiab smoothness ntawm sealing nto.Siv cov ntawv xuab zeb zoo los yog nplua-grained abrasive muab tshuaj txhuam, qhov loj me yog 280 #-W5, qhov loj me me yog qhov zoo, qhov txiav me me, uas yog qhov zoo los txo qhov roughness;Nyob rau tib lub sijhawm, cov cuab yeej sib tsoo yuav tsum tau hloov, thiab cov cuab yeej sib tsoo yuav tsum huv.

Tom qab kev sib tsoo nruab nrab, qhov sib cuag ntawm lub valve yuav tsum ci.Yog tias koj kos ob peb strokes ntawm lub taub hau lub taub hau lossis lub rooj zaum nrog lub cwj mem, tig lub taub hau lub taub hau lossis lub rooj zaum ntawm lub rooj zaum maj mam, thiab tshem tawm cov xaum kab.

Kev sib tsoo zoo yog cov txheej txheem tom kawg ntawm kev sib tsoo valve, feem ntau los txhim kho qhov smoothness ntawm sealing nto.Rau kev sib tsoo zoo, nws tuaj yeem diluted nrog cov roj cav, roj av, thiab lwm yam nrog W5 los yog cov feem me me, thiab tom qab ntawd siv lub taub hau valve los zom lub rooj zaum ntawm lub rooj zaum es tsis txhob ua yeeb yam, uas yog qhov zoo dua rau qhov nruj ntawm qhov sealing nto.

Thaum sib tsoo, tig nws clockwise txog 60-100 °, thiab tom qab ntawd tig nws li 40-90 ° nyob rau hauv qhov opposite direction.Maj mam grind rau ib pliag.Nws yuav tsum tau kuaj ib zaug.Thaum qhov sib tsoo ua ci thiab ci, nws tuaj yeem pom ntawm lub taub hau valve thiab lub rooj zaum valve.Thaum muaj cov kab nyias nyias thiab cov xim yog xim dub thiab ci, maj mam txhuam nws nrog cov roj cav ob peb zaug thiab so nrog cov ntaub qhwv huv.

Tom qab sib tsoo, tshem tawm lwm yam tsis xws luag, uas yog, sib sau ua ke sai li sai tau, thiaj li tsis ua rau lub taub hau hauv av puas.

Kev sib tsoo, tsis hais txog kev sib tsoo ntxhib lossis kev sib tsoo zoo, ib txwm khiav los ntawm kev sib tsoo ntawm kev nqa, txo qis, tig, rov ua dua, tapping, thiab thim rov qab ua haujlwm.Lub hom phiaj yog kom tsis txhob rov ua dua ntawm abrasive grain khiav, kom cov cuab yeej sib tsoo thiab lub sealing nto tuaj yeem ua tau zoo ib yam hauv av, thiab qhov flatness thiab smoothness ntawm sealing nto tuaj yeem txhim kho.

3 theem tshuaj ntsuam

Nyob rau hauv cov txheej txheem sib tsoo, cov theem tshuaj xyuas yog ib txwm khiav.Lub hom phiaj yog kom ua raws li qhov xwm txheej ntawm kev sib tsoo txhua lub sijhawm, kom cov kev sib tsoo zoo tuaj yeem ua tau raws li cov kev cai.Nws yuav tsum raug sau tseg tias thaum sib tsoo sib txawv li qub, cov cuab yeej sib tsoo tsim nyog rau ntau yam sealing nto yuav tsum tau siv los txhim kho kev sib tsoo thiab xyuas kom zoo sib tsoo.

Valve sib tsoo yog ib qho kev ua haujlwm zoo heev, uas yuav tsum muaj kev paub tas li, tshawb nrhiav, thiab kev txhim kho hauv kev xyaum.Qee lub sij hawm kev sib tsoo zoo heev, tab sis tom qab kev teeb tsa, nws tseem xau chav thiab dej.Qhov no yog vim muaj kev xav ntawm kev sib tsoo sib txawv thaum lub sij hawm sib tsoo.Kev sib tsoo pas nrig tsis ntsug, skewed, los yog lub kaum sab xis ntawm cov cuab yeej sib tsoo yog deviated.

Txij li thaum lub abrasive yog ib tug sib tov ntawm abrasive thiab sib tsoo kua, cov sib tsoo kua tsuas yog dav siv kerosene thiab cav roj.Yog li ntawd, tus yuam sij rau qhov raug xaiv ntawm abrasives yog xaiv qhov tseeb ntawm abrasives.

4 Yuav ua li cas xaiv valve abrasives kom raug?

Alumina (AL2O3) Alumina, tseem hu ua corundum, muaj siab hardness thiab dav siv.Feem ntau siv los grind workpieces ua los ntawm cam khwb cia hlau, tooj liab, hlau thiab stainless hlau.

Silicon Carbide (SiC) Silicon carbide muaj nyob rau hauv ntsuab thiab dub, thiab nws hardness yog siab dua li ntawm alumina.Ntsuab silicon carbide yog tsim rau kev sib tsoo nyuaj alloys;dub silicon carbide yog siv rau kev sib tsoo nkig thiab muag khoom, xws li cam khwb cia hlau thiab tooj dag.

Boron carbide (B4C) muaj hardness thib ob tsuas yog pob zeb diamond hmoov thiab nyuaj dua silicon carbide.Nws yog tsuas yog siv los hloov pob zeb diamond hmoov los zom cov alloys nyuaj thiab zom nyuaj chrome-plated nto.

Chromium oxide (Cr2O3) Chromium oxide yog hom tawv tawv thiab zoo heev abrasive.Chromium oxide feem ntau yog siv rau hauv kev sib tsoo zoo ntawm cov hlau tawv, thiab nws feem ntau yog siv rau polishing.

Hlau oxide (Fe2O3) Hlau oxide kuj yog ib tug zoo valve abrasive, tab sis nws hardness thiab sib tsoo nyhuv yog phem tshaj chromium oxide, thiab nws siv yog tib yam li chromium oxide.

Pob zeb diamond hmoov yog crystalline pob zeb C. Nws yog ib qho nyuaj abrasive nrog zoo txiav kev ua tau zoo thiab tshwj xeeb tshaj yog haum rau kev sib tsoo nyuaj alloys.

Tsis tas li ntawd, lub thickness ntawm abrasive particle loj (qhov me me ntawm cov abrasive) muaj qhov cuam tshuam loj rau kev sib tsoo thiab qhov roughness tom qab sib tsoo.Hauv kev sib tsoo ntxhib, qhov roughness ntawm lub valve workpiece tsis tas yuav tsum tau.Txhawm rau txhawm rau txhim kho kev sib tsoo, yuav tsum siv cov coarse-grained abrasives;Hauv kev sib tsoo zoo, qhov nyiaj sib tsoo me me thiab qhov roughness ntawm lub workpiece yuav tsum siab, yog li cov nplua-grained abrasives tuaj yeem siv tau.

Thaum lub sealing nto yog coarsely hauv av, abrasive grain loj yog feem ntau 120 # ~ 240 #;rau kev sib tsoo zoo, nws yog W40 ~ 14.

Lub valve modulates lub abrasive, feem ntau yog los ntawm kev ntxiv roj av thiab cav roj ncaj qha mus rau abrasive.Cov abrasive sib xyaw nrog 1/3 kerosene ntxiv rau 2/3 cav roj thiab abrasive yog tsim rau kev sib tsoo ntxhib;cov abrasive sib xyaw nrog 2/3 kerosene ntxiv rau 1/3 cav roj thiab abrasive tuaj yeem siv rau kev sib tsoo zoo.

Thaum sib tsoo workpieces nrog hardness dua, cov nyhuv ntawm kev siv cov saum toj no-hais abrasives tsis zoo tagnrho.Lub sijhawm no, peb feem ntawm cov abrasives thiab ib feem ntawm cov lard rhuab tuaj yeem siv los sib xyaw ua ke, thiab nws yuav tsim cov tshuaj txhuam tom qab txias.Thaum siv, ntxiv ib co kerosene los yog roj av thiab sib tov kom huv si.

5 Kev xaiv cov cuab yeej sib tsoo

Vim tias qhov sib txawv ntawm kev puas tsuaj rau qhov sib khi ntawm lub valve disc thiab lub rooj zaum valve, lawv tsis tuaj yeem tshawb nrhiav ncaj qha.Hloov chaw, qee tus lej thiab cov lus qhia tshwj xeeb ntawm cov discs cuav (uas yog, kev sib tsoo taub hau) thiab cov rooj zaum cuav (uas yog, rooj sib tsoo) tshwj xeeb ua ntej yog siv los txheeb xyuas lub valve.Sib tsoo lub rooj thiab disc.

Lub taub hau sib tsoo thiab lub rooj sib tsoo yog ua los ntawm cov pa roj carbon zoo tib yam los yog cam khwb cia hlau, thiab qhov loj thiab lub kaum sab xis yuav tsum sib npaug ntawm lub valve disc thiab lub rooj zaum ntawm lub valve.

Yog tias kev sib tsoo ua tiav manually, yuav tsum muaj ntau yam sib tsoo rods.Sib tsoo pas nrig thiab cov cuab yeej sib tsoo yuav tsum tau sib dhos kom zoo thiab tsis skewed.Txhawm rau txo qis kev siv zog thiab kev sib tsoo ceev, cov tshuab hluav taws xob lossis cov tshuab vibration feem ntau siv rau kev sib tsoo.