Kunezinhlobo eziningi ezahlukene zemishini edinga ukuvala shaft ezungezayo edlula endlini enganyakazi.Izibonelo ezimbili ezijwayelekile amaphampu nezixube (noma izixuku).Nakuba eziyisisekelo
izimiso zokuvala imishini ehlukene ziyefana, kunomehluko odinga izixazululo ezihlukene.Lokhu kungezwani kuholele ezingxabanweni ezinjengokunxenxa i-American Petroleum Institute
(I-API) 682 (izinga le-pump mechanical seal) lapho icacisa izimpawu zabaxube.Uma kucutshungulwa izigxivizo zemishini zamaphampu ngokumelene nezixube, kunomehluko osobala ambalwa phakathi kwezigaba ezimbili.Isibonelo, amaphampu agxunyekiwe anamabanga amafushane (ngokujwayelekile akalwa ngamayintshi) ukusuka ku-impeller kuya ku-radial bearing uma kuqhathaniswa nengxube evamile yokungena ephezulu (evamise ukukalwa ngamamitha).
Leli banga elide elingasekelwe liphumela kuplathifomu ezinzile ene-radial runout enkulu, ukungahambi kahle kwe-perpendicular kanye ne-eccentricity kunamaphampu.Ukuphelelwa ngamandla kwemishini kubangela izinselelo ezithile zokuklama kwezigxivizo zemishini.Kuthiwani uma ukuchezuka kwe-shaft bekungama-radial nje?Ukuklama uphawu lwalesi simo kungenziwa kalula ngokwandisa indawo evulekayo phakathi kwezingxenye eziphendukayo nezimile kanye nokwandiswa kwezindawo ezigijima zophawu.Njengoba kusolwa, izingqinamba azilula kanje.Ukulayisha emaceleni kuma-impeller, nomaphi lapho elele khona ku-mixer shaft, kunikeza ukuchezuka okuhumusha yonke indlela phakathi kophawu kuye endaweni yokuqala yokusekela ku-shaft—i-gearbox radial beararing.Ngenxa yokuchezuka kwe-shaft kanye nokunyakaza kwe-pendulum, ukuchezuka akuwona umsebenzi womugqa.
Lokhu kuzoba nengxenye ye-radial kanye ne-angular kuyo eyenza ukungahambi kahle kwe-perpendicular at the seal okungadala izinkinga ku-mechanical seal.Ukuchezuka kungabalwa uma izici eziyinhloko ze-shaft kanye nokulayishwa kwe-shaft zaziwa.Isibonelo, i-API 682 ithi ukuchezuka kwe-shaft radial ebusweni bophawu lwepompo kufanele kulingane noma kube ngaphansi kwamayintshi angu-0.002 inani elibonisiwe lokufunda (TIR) ezimweni ezinzima kakhulu.Ububanzi obujwayelekile ku-mixer yokufaka ephezulu buphakathi kuka-0.03 kuya ku-0.150 amayintshi TIR.Izinkinga ezingaphakathi kwe-mechanical seal ezingaba khona ngenxa yokuchezuka kwe-shaft ngokweqile zihlanganisa ukuguga okukhulayo ezingxenyeni zophawu, izingxenye ezijikelezayo ezithinta izakhi ezilimazayo ezinganyakazi, ukugingqika nokumpintsha indandatho ye-O eguquguqukayo (okubangela ukwehluleka ukusonga kwe-O-ring noma ukulengisa ubuso. ).Konke lokhu kungaholela ekunciphiseni ukuphila kwezimpawu.Ngenxa yokunyakaza okweqile okukhona kuma-mixers, izimpawu zemishini zingabonisa ukuvuza okwengeziwe uma kuqhathaniswa nokufanayo.futha izimpawu, okungaholela ekutheni uphawu ludonswe ngokungadingekile kanye/noma ngisho nokwehluleka ngaphambi kwesikhathi uma lungaqashwa ngokucophelela.
Kunezimo lapho usebenza eduze nabakhiqizi bemishini futhi uqonda ukuklanywa kwezinto zokusebenza lapho into eginqikayo ingafakwa kuma-cartridges ophawu ukuze kukhawulwe i-angularity ebusweni bophawu futhi kuncishiswe lezi zinkinga.Kufanele kuqashelwe ukuze kusetshenziswe uhlobo olufanele lokuthwala nokuthi imithwalo engase ithwale iqondwe ngokuphelele noma inkinga ingase ibe yimbi kakhulu noma idale inkinga entsha, ngokwengezwa kwe-bearing.Abathengisi bezimpawu kufanele basebenzisane eduze ne-OEM kanye nabakhiqizi abaphethe ukuze baqinisekise ukwakheka okufanele.
Izinhlelo zokusebenza ze-mixer seal ngokuvamile zinejubane eliphansi (ukuzungezisa okungu-5 ukuya ku-300 ngomzuzu [rpm]) futhi azikwazi ukusebenzisa izindlela ezithile zendabuko ukugcina uketshezi oluvimbelayo lupholile.Isibonelo, ku-Plan 53A yezimpawu ezimbili, ukujikeleza koketshezi oluvinjiwe kunikezwa isici sokumpompa sangaphakathi njengesikulufu sokupompa i-axial.Inselele ukuthi isici sokumpompa sincike esivinini semishini ukuze sikhiqize ukugeleza kanye nesivinini esivamile sokuxuba asiphezulu ngokwanele ukukhiqiza amazinga okugeleza awusizo.Izindaba ezinhle ukuthi ukushisa kwe-seal face akuwona okudala ukuthi izinga lokushisa loketshezi lokuvimbela likhuphuke ngoi-mixer seal.Ukucwiliswa kokushisa okuvela enqubweni engabangela ukwanda kwamazinga okushisa okuvimba uketshezi kanye nokwenza izingxenye zophawu oluphansi, ubuso nama-elastomer, isibonelo, engozini yokushisa okuphezulu.Izingxenye zophawu oluphansi, ezifana nobuso be-seal kanye nama-O-rings, zisengozini kakhulu ngenxa yokuba seduze nenqubo.Akukhona ukushisa okulimaza ngokuqondile ubuso be-seal kodwa kunalokho i-viscosity encishisiwe, ngakho-ke, ukuthambisa koketshezi oluvimbelayo ebusweni bophawu oluphansi.Ukugcotshwa okungalungile kubangela ukulimala kobuso ngenxa yokuxhumana.Ezinye izici zedizayini zingafakwa ku-cartridge yophawu ukuze kugcinwe amazinga okushisa okuvimba ephansi futhi kuvikelwe izingxenye zophawu.
Izigxivizo zemishini yezixube zingaklanywa ngamakhoyili okupholisa angaphakathi noma amajakhethi axhumene ngqo noketshezi oluvimbelayo.Lezi zici ziyiluphu evaliwe, ingcindezi ephansi, isistimu yokugeleza okuphansi enamanzi okupholisa azungezwe ngawo asebenza njengesishintshi sokushisa esibalulekile.Enye indlela ukusebenzisa i-spool yokupholisa ku-cartridge ye-seal phakathi kwezingxenye zophawu oluphansi nendawo yokufaka izinto zokusebenza.I-spool yokupholisa indawo lapho amanzi okupholisa anomfutho ophansi angageleza khona ukuze akhe umgoqo wokuvikela phakathi kophawu nomkhumbi ukuze kukhawulwe ukucwiliswa kokushisa.I-spool yokupholisa eklanywe kahle ingavimbela izinga lokushisa elidlulele elingaholela ekulimalenivala ubusokanye nama-elastomers.Ukucwiliswa kokushisa okuvela kule nqubo kubangela ukuthi izinga lokushisa loketshezi oluvimbelayo likhuphuke esikhundleni salokho.
Lezi zici ezimbili zedizayini zingasetshenziswa ngokuhlanganyela noma ngazodwana ukuze zisize ukulawula amazinga okushisa kuphawu lomshini.Imvamisa, izigxivizo eziyimishini zabaxubi zicaciswa ukuthi zithobelane ne-API 682, Isigaba 1 soshicilelo lwesi-1, nakuba le mishini ingahambisani nezidingo zokuklama ku-API 610/682 ngokusebenza, ubukhulu kanye/noma ngokomshini.Lokhu kungenzeka kungenxa yokuthi abasebenzisi bokugcina bajwayelene futhi banethezekile nge-API 682 njengokucaciswa kophawu futhi abazazi ezinye izicaciso zomkhakha ezisebenza kakhulu kule mishini/izigxivizo.I-Process Industry Practices (PIP) kanye ne-Deutsches Institut fur Normung (DIN) ingamazinga amabili emboni afaneleka kakhulu lezi zinhlobo zezimpawu—izindinganiso ze-DIN 28138/28154 kudala zishiwo kuma-OEMs okuxuba eYurophu, kanti i-PIP RESM003 isisetshenziswa njenge isidingo sokucaciswa kwezigxivizo zemishini emishinini yokuxuba.Ngaphandle kwalokhu kucaciswa, awekho amazinga embonini ajwayele ukwenziwa, okuholela ezinhlobonhlobo zobukhulu begumbi lophawu, ukubekezelelana kwemishini, ukuchezuka kweshaft, imiklamo yebhokisi lamagiya, amalungiselelo okuthwala, njll., ahluka ukusuka ku-OEM kuye kwe-OEM.
Indawo yomsebenzisi kanye nemboni kuzonquma kakhulu ukuthi iyiphi yalezi zicaciso ezofaneleka kakhulu kusayithi laboama-mixer mechanical seals.Ukucacisa i-API 682 ye-mixer seal kungase kube izindleko ezingeziwe ezingadingekile kanye nenkinga.Nakuba kungenzeka ukufaka uphawu oluyisisekelo oluneziqu ze-API 682 ekucushweni komxube, le ndlela ivamise ukuphumela ebucayini kokubili ngokuya ngokuhambisana ne-API 682 kanye nokufaneleka komklamo wezinhlelo zokusebenza ze-mixer.Isithombe sesi-3 sibonisa uhlu lomehluko phakathi kwe-API 682 Isigaba 1 seal ngokumelene ne-mixer mechanical seal evamile
Isikhathi sokuthumela: Oct-26-2023