Indlela iCartridge Mechanical Seal ephucula ngayo ukuthembeka kwePump

Intshayelelo

Ukuthembeka kwepompo kudla ngokuxhomekeka kwiseti encinci yezinto, kwaye itywina loomatshini lelinye lawona abaluleke kakhulu. Xa amatywina kunzima ukuwafaka, ebuthathaka ekulungelelanisweni, okanye enokuvuza, iindleko zokungasebenzi ezingacwangciswanga kunye nokugcinwa zinyuka ngokukhawuleza. Itywina loomatshini lekhatriji liphucula eli nqanaba libuthathaka ngokudibanisa izinto zokutywina kwiyunithi esele isetiwe enciphisa impazamo yokufaka, izinzisa umthwalo wobuso betywina, kwaye ixhasa ukusebenza rhoqo. Eli nqaku lichaza indlela olo yilo oluphucula ngayo ulawulo lokuvuza, lwandisa ubomi benkonzo, kwaye lunceda iipompo zisebenze ixesha elide phakathi kokusilela, linika abafundi umbono ocacileyo wesizathu sokuba amatywina ekhatriji asetyenziswa kakhulu kwiinkqubo zokuphatha ulwelo ezifuna amandla.

Kutheni iiCartridge Mechanical Seals ziphucula ukuthembeka kwePump

Utshintsho oluvela ekupakisheni okuqhelekileyo kunye nezitywino zecandelo ukuyaitywina zoomatshini zekhatriji [https://www.victor-seals.com]s imele utshintsho olusisiseko ekuthembekeni kokuphathwa kolwelo. Ngokufaka zonke izinto ezibalulekileyo zokutywina kwiyunithi enye, esele isetiwe, izakhiwo zoshishino zihlala zandisa iMean Time Between Failures (MTBF) ukusuka kumyinge weenyanga ezili-12 ukuya kwiinyanga ezingaphezu kwama-36 kwizicelo ezifuna kakhulu.

Ukuthembeka kweempompo ze-centrifugal kunxulunyaniswa ngokungenakuhlukaniswa nokuthembeka kwetywina loomatshini. Xa itywina lingasebenzi, ipompo kufuneka isuswe kwi-intanethi, nto leyo ekhokelela ekuphazamisekeni kwenkqubo, kwiingozi zokusingqongileyo, kunye nokungenelela okubiza kakhulu kokugcinwa. Iityuli zekhatriji zijongana nezizathu ezibangela oku kusilela ngokucwangcisa izinto eziguquguqukayo ezinxulumene nokuhlanganiswa nokufakelwa ngesandla.

Ulawulo lokuvuza kunye nokuchaneka kokufakwa

Eyona nto iphambili ekuqinisekiseni ukuthembeka kwe-cartridge seal kukususa ngokupheleleyo izinto eziguquguqukayo zokufakela. Ii-component seals zifuna iingcali ukuba zibale ngesandla kwaye zibeke uxinzelelo lwentwasahlobo kwi-shaft ngokulinganisa ubude bokusebenza obubalulekileyo. Le nkqubo yenziwa ngesandla inokuba neempazamo ezininzi ebantwini, nto leyo edla ngokubangela ukungalingani komthwalo wobuso okanye ukuguguleka okugqithisileyo.

Izitywino zekhatriji zivela kumvelisi zihlanganiswe ngokupheleleyo, kunye noxinzelelo lwentwasahlobo olusetwe kwangaphambili kusetyenziswa iziqeshana zokuseta ezisuswayo. Olu yilo ludibeneyo luqinisekisa ukulayisha ubuso obufanelekileyo ukususela ngexesha lokufakelwa kwaye luvumela ngokulula ukunyamezelana okuqhelekileyo kokujikeleza kweshaft okungaphantsi kwe-0.05 mm (0.002 intshi). Ngokususa isidingo sokulinganisa ngokuchanekileyo kumgangatho wevenkile, izixhobo zinokunciphisa ukusilela kwesitywino okubangelwa kukufakelwa ukuya kuthi ga kwi-75%, ngokufanelekileyo ukunciphisa umngcipheko wokuvuza kwangoko ekuqaleni.

Ukunciphisa ixesha lokungasebenzi kunye nomzamo wokulungisa

Ixesha lokungasebenzi kwezixhobo zoshishino linesohlwayo esinzima sezemali, esidla ngokudlula amashumi amawaka eedola ngeyure kumashishini aqhubeka nenkqubo. Ukuphucula kwiiseal zekhatriji kunciphisa kakhulu iMean Time To Repair (MTTR) kwiimpahla ezibalulekileyo zokupompa.

Ukutshintsha isitywino sezinto zemveli kunokuthatha iiyure ezi-4 ukuya kwezi-6 zomsebenzi onobuchule, ikakhulu ngenxa yokuphathwa ngononophelo okufunekayo kubuso obujikelezayo bomntu ngamnye, izihlalo ezimileyo, kunye nee-O-rings eziguqukayo. Ngokwahlukileyo koko, isitywino sekhatriji sinokutyibilika kwishafti, sibotshelelwe kwi-gland, kwaye siqiniswe ngaphantsi kwemizuzu engama-90. Lo mzamo wokulungisa olula awubuyiseli nje kuphela ipompo ukuba isebenze ngokukhawuleza kodwa unciphisa ukuxhomekeka kwesixhobo kwiingcali ezikumgangatho ophezulu.iingcali zoomatshini bokuvala izitywino.

I-Cartridge vs i-Component Mechanical Seals

Ukuqonda umahluko phakathi kwe-cartridge kunye ne-component mechanical seals kubalulekile kwiinjineli zezityalo ezifuna ukuphucula iindleko zomjikelo wobomi bezixhobo. Umahluko osisiseko ulele kwindlela izinto zokutywina ezidibana ngayo ne-pump shaft kunye ne-stuffing box.

Nangona zombini ezi zakhiwo zixhomekeke kwifilimu yolwelo oluncinci oluphakathi kobuso obujikelezayo nobungashukumiyo ukuthintela ukuvuza, ukuphunyezwa kwalo mgaqo ngoomatshini kumisela ukuba isitywina sibuthathaka kangakanani kuxinzelelo lokusebenza.

Iimpawu zoyilo eziphucula ukuthembeka

Ii-cartridge seals zidibanisa i-shaft sleeve, ubuso be-seal, izipringi ezinika amandla, kunye ne-gland plate kwi-cohesive enye, evavanyiweyo ngumzi-mveliso. Olu manyano luthintela ubuso be-seal obunamathelisiweyo kakhulu ekubeni buvezwe kukungcola, i-grisi, okanye umonakalo ngexesha lokuthuthwa nokuphathwa.

Ngaphezu koko, uyilo lwekhatriji oluphambili ludla ngokusebenzisa izipringi ezimileyo endaweni yezipringi ezijikelezayo. Izipringi ezimileyo zahlulwe kulwelo lwenkqubo, nto leyo ethintela ukuba zingavaleki kwizicelo ezixineneyo okanye eziqinisayo. Olu khetho loyilo lugcina amandla okuvala ahambelanayo angama-15 ukuya kuma-25 psi ebusweni besitywina, ukuqinisekisa ukusebenza okuzinzileyo naphantsi kweemeko zoxinzelelo eziguquguqukayo.

Umahluko kumngcipheko wokuvuza kunye novakalelo lokulungelelaniswa

Izitywini zecandelo zinovelwano kakhulu kwintshukumo ye-axial shaft kunye nokwanda kobushushu. Naluphi na utshintsho kwi-shaft lunokutshintsha ngokulula ubude bokusebenza obubalulekileyo, okukhokelela ekuqhekekeni kobuso (ukuvuza okubi) okanye ukucinezelwa okugqithisileyo (ukuveliswa kobushushu ngokukhawuleza kunye nokutshatyalaliswa kobuso). Uyilo lwe-cartridge luhlala lunyamezela ukudlala komgca oqhelekileyo we-shaft, luhlala luvumela iintshukumo ze-axial ukuya kuthi ga kwi-0.13 mm (0.005 intshi) ngaphandle kokuphazamisa ukudibana kobuso ngokuchanekileyo.

Izinto zobugcisa ezichaphazela ukusebenza kweSeal

Ubomi bokusebenza kwesitywina soomatshini bulawulwa kakhulu yindawo yokusebenza kunye nenkcazo echanekileyo yamacandelo aso angaphakathi. Ukukhetha iiparameter zobugcisa ezifanelekileyo akunakuxoxiswana ngazo ukuze kufikelelwe ekuthembekeni okuphezulu kunye nokuthintela ukungaphumeleli okungalindelekanga kwangaphambili.

Abasebenzi kufuneka bahlole ngononophelo iipropati zeekhemikhali kunye nezomzimba zolwelo olupompelweyo, njengoko ezi zinto zilawula yonke into ukusuka kwi-metallurgy ye-gland ukuya kwi-elastomers ezithile ezisetyenziselwa ukutywina okwesibini.

Izixhobo zobuso beSeal kunye nokuhambelana kwe-elastomer

Ukudityaniswa kwe-tribological kobuso be-seal kulawula amazinga okuguguleka, ii-coefficients zokungqubana, kunye nokuveliswa kobushushu. Ukudityaniswa okuqhelekileyo kuquka iSilicon Carbide (SiC) ngokuchasene neCarbon kwizicelo zamanzi ngokubanzi kunye ne-hydrocarbon ekhanyayo, okubonelela ngokugcoba okugqwesileyo. Kwi-slurry erhabaxa, ukudityaniswa okuqinileyo kweSiC ngokuchasene neTungsten Carbide (TC) kuyafuneka ukuze kuthintelwe amanqaku.

Ukukhethwa kwe-elastomer kubaluleke ngokulinganayo ekuthinteleni ukubola kweekhemikhali. Ii-O-rings eziqhelekileyo ze-FKM (Viton) O zisebenza kakuhle kakhulu kwiinkonzo eziqhelekileyo kodwa ziwohloka ngokukhawuleza ngaphezu kwama-204°C (400°F). Ngokwahlukileyo koko, ii-FFKM (Kalrez) compounds zinokugcina ukuthamba kwazo kunye nokumelana neekhemikhali kumaqondo obushushu aphezulu ukuya kuthi ga kwi-327°C (620°F), nto leyo eyenza ukuba zibe yinkcazo ebalulekileyo kwiinkonzo zokucoca ezishushu kakhulu.

Iimfuneko zocwangciso loxinzelelo, ubushushu, kunye nokucoca

Uxinzelelo lwenkqubo kunye nobushushu bulawula imfuneko yolawulo lokusingqongileyo, oluhambelana nemigangatho yehlabathi jikelele phantsi kwezicwangciso ze-API 682 flush. I-cartridge seal eqhelekileyo inokusingatha uxinzelelo lwebhokisi yokuzalisa ukuya kuthi ga kwi-20 ukuya kwi-25 bar (300 ukuya kwi-360 psi) ngaphandle kwengxaki.

Ngaphaya kolu xinzelelo, okanye xa uphatha ulwelo oluguquguqukayo nolunetyhefu kakhulu,izitywino zekhatriji ezimbiniUkusebenzisa inkqubo yolwelo lokuthintela oluxinzelelweyo lwePlani 53A okanye iPlani 53B kuyafuneka. Ezi nkqubo zigcina uxinzelelo lolwelo lokuthintela oluqhele ukuba yi-1.5 ukuya kwi-2 bar (20 ukuya kwi-30 psi) ephezulu kunoxinzelelo lwenkqubo yangaphakathi. Olu mahluko woxinzelelo oluhle luqinisekisa ukuba nakuphi na ukuvuza okunokwenzeka kwenzeka ngaphakathi kwimpompo kunokuba kuphume ngaphandle emoyeni, okuqinisekisa ukuba akukho kukhutshwa komoya emoyeni.

Iindlela eziqhelekileyo zokusilela kunye nokuthintela

Kwanezona seal zekhatriji ziqinileyo ziya kuba zizisulu zeendlela zokusebenza ezingasebenzi kakuhle okanye ukuphazamiseka kwenkqubo. Ukusebenza okomileyo kusengunobangela ophambili wokusilela kweseal okubangelwe yintlekele, okubangela ukutshayiswa ngokukhawuleza kobushushu kunye nokuqhekeka kwemitha kwiindawo eziqinileyo kwimizuzwana embalwa emva kokulahlekelwa yifilimu yolwelo.

Indlela yokukhetha nokusebenzisa iiCartridge Seals

Ukutshintsha indawo ibe ziiseli zoomatshini zekhatriji kufuna ukuqinisekiswa kobunjineli obucwangcisiweyo kunye nokuthotyelwa ngokungqongqo kwimigaqo yokusetyenziswa. Iseli sekhatriji esingachazwanga kakuhle okanye esingasebenzi kakuhle siya kusilela ngokukhawuleza njengeseli yecandelo elidala.

Ukuphunyezwa ngempumelelo kuvala umsantsa phakathi koyilo lwetywina olusekelwe kwithiyori kunye neenyani ezibonakalayo zomgangatho wesityalo, kuqinisekisa ukuba izixhobo eziphuculweyo zidibana kakuhle nemilinganiselo yepompo ekhoyo.

Ukukhethwa kwesitywina kunye nokuhlolwa kwesicelo

Iinjineli kufuneka ziqinisekise ngokungqongqo i-envelope ebonakalayo yebhokisi yokuzalisa yepompo ngaphambi kokuba zichaze iyunithi yekhatriji. Umgama we-radial phakathi kwe-shaft kunye ne-stuffing box bore kufuneka unike ubuncinci be-3.175 mm (0.125 intshi) ukuze ilungele umkhono wekhatriji kwaye iqinisekise ukujikeleza kolwelo okwaneleyo ukuze kuphole ubuso besitywini.

Ukongeza, umngxuma ongenanto kufuneka uhlolwe ukuba awunazo iingxaki zokurhawuzelela, ukufaka amanqaku, okanye ukurhawuzelela okubangelwe zizitywino zecandelo zangaphambili. Nangona imikhono yekhatriji yenzelwe ukutyibilika nokugubungela umonakalo we-shaft okhoyo, ukuguguleka okugqithisileyo okanye ukurhawuzelela komngxuma okungaphezulu kwe-0.08 mm (0.003 intshi) kunokuphazamisa isitywino sangaphakathi se-O-ring phakathi komngxuma kunye nomngxuma, nto leyo enokubangela ukuba kufuneke ukutshintshwa komngxuma okanye ukutshintshwa komngxuma ngaphambi kokufakwa kwesitywino.

Ukufakela kunye nokugunyazisa iindlela ezilungileyo zokusebenzisa

Ukufaka i-cartridge seal kuxhomekeke kakhulu ekuphumezeni ulandelelwano lokufakela ngokungenasiphako. Ii-gland bolts kufuneka zibotshelelwe ngokulinganayo ngendlela etshintshanayo ngokweemfuno zomenzi—ngesiqhelo phakathi kwe-20 kunye ne-40 Nm kuxhomekeke kububanzi be-stud—ukuthintela ukugqwetheka kwe-gland kunye nokungahambi kakuhle kobuso okulandelayo.

Okubalulekileyo kukuba, izikliphu zangaphandle ezijikeleza kufuneka zisuswe kuphela emva kokuba i-gland ibotshelelwe ngokuqinileyo kwi-pump casing kwaye izikrufu ze-sleeve set zivalelwe ngokuqinileyo kwi-shaft. Ukususa ezi kliphu kwangethuba kakhulu kuya konakalisa ngoko nangoko uxinzelelo lwentwasahlobo olusetwe kwangaphambili. Okokugqibela, abaqhubi kufuneka bakhuphe umoya ngokupheleleyo kwigumbi lokutywina ngaphambi kokuba imoto iqalise ukusebenza; ukungaphumeleli ukucoca umoya ovalelweyo kuya kubangela ukuba i-gland isebenze ngoko nangoko kwaye yenze umonakalo ebusweni obungenakulungiseka.

Ukuqinisekiswa kweendleko kunye nocwangciso lokuphucula

Nangona iindleko zokuqala zokuthenga isitywina sekhatriji esihlanganisiweyo ngokubanzi ziphezulu ngama-200% ukuya kuma-300% kunesitywina secandelo elifanayo, ukuqinisekiswa kweendleko zolawulo lwezityalo kulula kwaye kulungile kakhulu.

Xa kujongwa ukunciphisa okukhulu kwabasebenzi abafakelweyo abakhethekileyo, ukususwa ngokupheleleyo kwe-shaft fretting (ekonga iindleko ezinkulu zokutshintsha ii-pump shafts ezibizayo), kunye nexesha lokungasebenzi kwemveliso elincitshisiweyo, izakhiwo zihlala zifumana iMbuyekezo epheleleyo kuTyalo-mali (ROI) kwiinyanga ezili-12 ukuya kwezili-18. Ukuze kuphuculwe le nzuzo yemali, ukuphuculwa kwe-bulk seal kufuneka kucwangciswe ngobuchule ngexesha lokutshintshwa kwezityalo ezicwangcisiweyo ukuze kupheliswe ngokupheleleyo ukuphazamiseka kweenkqubo zemveliso ezisebenzayo.

Isakhelo seSigqibo soPhuculo lweSitywina

Izakhiwo ezisebenzisa amakhulu okanye amawaka eempompo ze-centrifugal azinakuphucula zonke izixhobo ezijikelezayo ngaxeshanye. Isakhelo sesigqibo esicwangcisiweyo, esiqhutywa yidatha siyafuneka ukuze kwabelwe imali apho kuya kuvelisa khona izabelo eziphezulu zokuthembeka kwangoko.

Ngokuhlalutya iingxelo zembali zolondolozo kunye namazinga okusilela, abaphathi bezityalo banokuchonga ukuba zeziphi iinkqubo zokumpompa ezichitha uhlahlo-lwabiwo mali lolondolozo kwaye bazibeke phambili ekuguqulweni kwe-cartridge seal.

Zeziphi iinkonzo zokumpompa ekufuneka zibekwe phambili

Kufuneka kuqalwe kuqala kwiimpompo “zomdlali ongalunganga” ezibhaliweyo—ngakumbi ezo zibonisa i-MTBF engaphantsi kweenyanga ezili-12. Ukuguqula ezi zixhobo ezisoloko zisilela kunika isiqabu esikhawulezileyo kubantu abathwele uxanduva olukhulu.amaqela olondolozo.

Amanqanaba aphambili ongezelelweyo kufuneka aquke iimpompo eziphatha ulwelo oluyingozi, olunobuthi, okanye oluvutha kakhulu apho naluphi na ukuvuza kwangaphandle kubeka umngcipheko wokhuseleko olukhawulezileyo okanye ukwaphulwa komthetho wokusingqongileyo. Ngaphezu koko, iinkonzo ezisebenza kumaqondo obushushu aphezulu enkqubo (adlula i-150°C) okanye iimpompo zenkqubo eziqhubekayo apho ixesha lokungasebenzi elingacwangciswanga libangela izohlwayo zemali ezidlula i-$10,000 ngeyure zezona zibalaseleyo zokuguqulwa ngoko nangoko zibe ziiseal zekhatriji ezimbini ezinokuthenjwa kakhulu.

Indlela yokulinganisela ixabiso lokuqala kunye nexabiso lomjikelo wobomi

Ukulinganisela iindleko zangaphambili zokuphucula isitywina sekhatriji ngokuchasene nexabiso laso lobomi bexesha elide kufuna uhlalutyo olupheleleyo lweendleko zobomi (LCC). I-LCC yokwenyani yesitywina soomatshini ibandakanya ixabiso lokuqala lokuthenga, umsebenzi wokufakelwa rhoqo, ukusetyenziswa kolwelo oluthintelayo, kunye nokulahlekelwa ngamandla okuqhubekayo ngenxa yokungqubana koomatshini.

Nangona izitywini zekhatriji zifuna imali ephezulu yokuqala, umthwalo wazo wobuso olungiselelwe kakuhle, ukusasazwa kobushushu okuphezulu, kunye nemikhono yokukhusela edibeneyo ivelisa ukwehla kwe-30% ukuya kwi-40% kwi-LCC iyonke kwixesha eliqhelekileyo lokusebenza leminyaka emi-5 xa kuthelekiswa nezitywini zakudala. Ngokumisela uyilo oluthile lwekhatriji kwisityalo, abaqhubi banokunciphisa kakhulu ubunzima bezinto ezisetyenzisiweyo, nto leyo ephucula ngakumbi inzuzo yokusebenza kwexesha elide.

Izinto ezibalulekileyo ekufuneka ziqwalaselwe

• Izigqibo ezibalulekileyo kunye nesizathu sokuba iCartridge Mechanical Seal iphucula njani ukuthembeka kwePump
• Iinkcukacha, ukuthobela imithetho, kunye nokuhlolwa komngcipheko okufuneka kuqinisekiswe ngaphambi kokuba uzibophelele
• Amanyathelo alandelayo asebenzayo kunye nezilumkiso abafundi abanokuzisebenzisa ngoko nangoko

Imibuzo ebuzwa qho

Itywina le-cartridge mechanical liyiphucula njani ukuthembeka kwepompo?

Iza sele isetiwe kwaye ihlanganiswe efektri, nto leyo enciphisa iimpazamo zokufakela, ukuvuza kwesixhobo sokuqala, kunye nokulayisha ubuso okungalinganiyo. Oku kunceda ukwandisa ubomi besitywino kunye nexesha lokusebenza kwepompo.

Kutheni itywina lekhatriji lithembeke ngakumbi kunetywina lecandelo?

I-cartridge seal ibandakanya i-sleeve, ubuso, izipringi, kunye ne-gland kwiyunithi enye. Olu yilo lunciphisa uvakalelo lokulungelelaniswa, lukhusela ubuso be-seal, kwaye lunciphisa umngcipheko wokuqhekeka kwe-shaft.

Ingakanani ixesha lokugcinwa kwe-cartridge seals enokonga?

Kwiimeko ezininzi zokulungiswa kwepompo, izitywino zekhatriji zinokufakwa ngaphantsi kwemizuzu engama-90, xa kuthelekiswa neeyure ezi-4 ukuya kwezi-6 zezitywino zecandelo. Oko kuthetha ukubuyela ngokukhawuleza kwinkonzo kunye nemfuno ephantsi yabasebenzi.

Ngaba iVictor Seals ingabonelela ngee-cartridge seals zokutshintshwa kweepompo ze-OEM?

Ewe. I-Victor Seals ibonelela ngeekhatriji kunye nezitywino zoomatshini ezihambelana ne-OEM kwiimpawu ezifana neGrundfos, IMO, Alfa Laval, Flygt, Lowara, APV, Fristam, kunye ne-Allweiler.

Ngawaphi amashishini azuza kakhulu kwiitywina ze-cartridge mechanical?

Ziluncedo ngakumbi kwiikhemikhali, emigodini, kwioyile nakwigesi, kwi-petrochemical, kumbane, kwi-pulp nakwiphepha, kwi-marine, nakwizicelo zamanzi apho ulawulo lokuvuza kunye nexesha lokusebenza kubalulekile.