Kodi Zisindikizo za Metal Bellows Mechanical Seals Zimateteza Bwanji Kutuluka kwa Madzi ndi Kuletsa Kutulutsa Mpweya Woipa?

Chiyambi

Kupewa kutayikira kwa madzi m'zida zozungulira sikudalira kokha pa zipangizo zosindikizira, komanso kapangidwe ka zosindikizira. Zosindikizira zachitsulo zophimba makina zimathetsa vuto limodzi mwa malo omwe nthawi zambiri zimalephera m'zosindikizira zachikhalidwe mwa kusintha ma elastomer amphamvu ndi zophimba zachitsulo zosinthasintha zomwe zimasunga katundu pansi pa mikhalidwe yovuta. Izi zimawapangitsa kukhala ofunika kwambiri m'ntchito zotentha kwambiri, zowononga, komanso zosagwirizana ndi mpweya woipa pomwe ngakhale kutayikira pang'ono kungakhudze chitetezo, kutsatira malamulo, komanso nthawi yogwira ntchito. Kumvetsetsa momwe zosindikizira izi zimagwirira ntchito kumathandiza kufotokoza chifukwa chake nthawi zambiri zimasankhidwa kuti zigwiritsidwe ntchito molimbika kuti zisakhale ndi mpweya woipa, komanso zabwino zomwe zimapereka poyerekeza ndi njira zachikhalidwe zosindikizira zosindikizira m'malo enieni ogwirira ntchito.

Chifukwa Chake Zisindikizo Zamakina za Metal Bellows Ndi Zofunika Popewa Kutuluka kwa Madzi

Mu zamakonomachitidwe ogwiritsira ntchito madzi, kukwaniritsa mpweya woipa wosachoka komanso kukulitsa kudalirika kwa zida ndi zolinga zazikulu kwa ogwira ntchito m'mafakitale. Zisindikizo zamakina zachitsulo zakhala ngati ukadaulo womaliza wotsekera kuti zigwiritsidwe ntchito kutentha kwambiri, kuwononga kwambiri, komanso kusamala chilengedwe. Mosiyana ndi zisindikizo zachikhalidwe zokankhira, zomwe zimadalira elastomer yachiwiri yosinthika kuti zigwirizane ndi kuwonongeka kwa nkhope ndi kuyenda kwa shaft, zisindikizo zachitsulo zimagwiritsa ntchito chitsulo chosasunthika komanso chosinthasintha. Kusintha kwakukulu kumeneku kumachotsa kufooka kwakukulu kwa zisindikizo zokhazikika: mphete ya O yosinthika.

Mwa kuchotsa elastomer yotsetsereka,zitsulo zomangira zisindikizo zamakinaMwachibadwa, zimateteza kuphulika kwa shaft ndikuchotsa kuwonongeka kwa elastomer komwe kumachitika chifukwa cha kutentha kwambiri. Ubwino wa kapangidwe kake umalola malo opangira zinthu kukankhira malire ogwirira ntchito pamene akutsatira malamulo okhwima okhudza chilengedwe, kusintha gawo la makina kukhala chinthu chofunikira kwambiri pakutsata malamulo ndi kupitiriza kugwira ntchito.

Udindo pakuwongolera mpweya woipa komanso kudalirika

Kuyesetsa kuti pasakhale kutulutsa mpweya woipa mu kukonza ma hydrocarbon ndi kupanga mankhwala kumayendetsedwa kwambiri ndi mabungwe azachilengedwe padziko lonse lapansi. Pansi pa njira monga United States Environmental Protection Agency (EPA) Method 21, malo osungiramo zinthu amalangidwa mwamphamvu chifukwa cha kutuluka kwa madzi ochulukirapo (VOC) komwe kumapitirira malire okwana 500 pa milioni (ppm). M'madera ovuta omwe sapezeka, madera oyang'anira khalidwe la mpweya m'deralo amatha kukakamiza malire ofika pa 100 ppm.

Zisindikizo zamakina zopangidwa ndi zitsulo zimakhala ndi gawo lofunika kwambiri pakusungabe kutsata malire okhwima awa. Chifukwa chakuti pakati pa zitsulozo pamakhala chisindikizo chopanda madzi kudzera mu welding yolondola, palibe njira yachiwiri yotulutsira madzi. Dongosolo lotsekera lachiwiri lokhazikikali limaonetsetsa kuti mpweya wotuluka m'mlengalenga umakhala pansi pa malire olamulidwa, zomwe zimapangitsa kuti kudalirika konse komanso nthawi yapakati pakati pa kulephera (MTBF) kwa zida zozungulira zizikhala bwino.

Kumene amapereka phindu loyezeka

Mtengo woyezeka wa zisindikizo zamakina zachitsulo umaonekera bwino kwambiri pamene ma elastomer achikhalidwe amalephera. Mu ntchito zoyeretsera, makamaka pokonza pansi pa mbiya, madzi otumizira kutentha, ndi kupanga phula, kutentha kwa kupompa nthawi zambiri kumapitirira 200°C (392°F) ndipo kumatha kufika pamwamba pa 400°C (752°F). Pazovuta izi, ngakhale ma perfluoroelastomer apamwamba amataya umphumphu wawo wamakina.

Kuphatikiza apo, mu ntchito zomwe zimafuna kupopera kapena kupangika kwa makristalo, kusakhala ndi mphete ya O yotsetsereka kumalepheretsa chisindikizocho "kupachikidwa" pa shaft. Madzi a processing akamauma mumlengalenga, mphete ya O yosinthika ya pusher seal imadzaza, zomwe zimapangitsa kuti nkhope ikule mwachangu komanso kutayikira koopsa. Chisindikizo chachiwiri chosasinthika cha kapangidwe ka chitsulo chimadutsa njira yolephera iyi kwathunthu, ndikuwonjezera nthawi yogwira ntchito ya pump ndi maola masauzande ambiri ndikupereka phindu mwachangu pa ndalama ngakhale kuti mtengo wogula woyamba unali wokwera.

Momwe Zisindikizo Zamakina za Metal Bellows Zimaletsera Kutayikira

Njira yaikulu yomwe ma bellows achitsulo amatetezera kutuluka kwa madzi imadalira kuthekera kwawo kusunga katundu wofanana komanso woyenera pankhope pamikhalidwe yosiyanasiyana yamphamvu. Chida cha bellows chimagwira ntchito nthawi imodzi ngati kasupe, chinthu chotseka champhamvu, ndi chotumizira mphamvu. Kapangidwe kameneka ka ntchito zambiri kamapangitsa kuti kapangidwe ka seal kakhale kosavuta komanso kumachotsa kukangana kwamkati komwe nthawi zambiri kumasokoneza kutsata nkhope mu ma seal okhazikika.

Mapangidwe a zinthu zomwe zimachepetsa kutuluka kwa madzi

Chimake cha ukadaulowu ndi kapisozi ka bellows kolumikizidwa m'mphepete. Chigawochi chimapangidwa kuchokera ku ma diaphragm achitsulo opangidwa ndi zilembo zolondola, kapena "masamba," omwe nthawi zambiri amakhala ndi makulidwe kuyambira 0.10 mpaka 0.15 mm. Masambawa ndi micro-plasma kapena laser welded pa diameter yawo yamkati ndi yakunja kuti apange convolution yosinthasintha.

Kapangidwe kameneka kolumikizidwa m'mphepete kamapereka chiwongolero chofanana cha masika a madigiri 360, kuonetsetsa kuti nkhope zoyambira za chisindikizo zimakhala zofanana bwino komanso zogwirizana nthawi zonse, ngakhale zitakhala kutishaft ya pampuimakumana ndi kupotoka pang'ono kwa radial kapena kusewera kwa axial. Kuchotsa ma spring ndi ma O-rings amphamvu kumachotsa hysteresis yamakina, zomwe zikutanthauza kuti nkhope ya seal imatha kuyankha nthawi yomweyo ku kugwedezeka kwa shaft popanda kukangana komwe kumayambitsa kutuluka kwa ma seal achizolowezi.

Momwe mikhalidwe yogwirira ntchito imakhudzira kutseka

Mikhalidwe yogwirira ntchito, makamaka kupanikizika ndi kutentha, imalamulira mwachindunji malire a magwiridwe antchito a bellows. Bellows zachitsulo zokhazikika za single-ply nthawi zambiri zimayesedwa kuti zigwirizane ndi kupsinjika kwa ntchito mpaka 20 mpaka 25 bar (290 mpaka 360 psi). Pa ntchito zoperekera chakudya cha mapaipi kapena boiler zomwe zimakhala ndi mphamvu yayikulu, bellows zokhala ndi laminated kapena multi-ply zimatha kupangidwa kuti zipirire kupsinjika kopitilira 60 bar (870 psi) popanda kugwedezeka.

Kusintha kwa kutentha kumakhudzanso metallurgy ya pakati pa bellows. Pamene kutentha kukukwera, modulus ya kusinthasintha kwa chitsulo imachepa, zomwe zimasintha pang'ono katundu wa nkhope. Magulu a mainjiniya amalipiritsa izi mwa kusankha ma alloys apamwamba a nickel ndikuwerengera molondola seti yokakamiza, kuonetsetsa kuti chisindikizocho chimakhala ndi mphamvu yokwanira yotsekera kaya ikugwira ntchito kutentha kwa -75°C kapena kutentha kwambiri mpaka 425°C.

Njira zodziwika bwino zolephera zokhudzana ndi kutayikira

Ngakhale kuti zisindikizo zamakina zachitsulo zimakhala zolimba kwambiri, sizingalephereke ngati zitagwiritsidwa ntchito molakwika. Kutopa kwa torsional ndi njira yoyamba yolephera; ngati kukhuthala kwa madzi kuli kwakukulu kwambiri kapena ngati pampu ikugwira ntchito youma, kukangana kwa nkhope za chisindikizo kungapangitse mphamvu yoposa mphamvu ya shear ya bellows welds, zomwe zimapangitsa kuti convolutions zing'ambike.

Njira ina yolephera kutayikira ndi chloride stress corrosion cracking (CSCC). Ngati zitsulo zosafunikira, monga chitsulo chosapanga dzimbiri cha 300-series, zikugwiritsidwa ntchito pamalo otentha kwambiri a saline kapena okhala ndi chloride yambiri, ming'alu ya microscopic idzafalikira kudzera m'masamba opyapyala a bellows. Pomaliza, kusokonekera kwa kutentha kwa nkhope za seal chifukwa cha kuzizira kosakwanira kapena kutsuka kumatha kupotoza malo ozungulira, ndikupanga mpata wa microscopic womwe umalola madzi opangidwa kutuluka.

Zisindikizo za Metal Bellows vs Pusher

Kusankha kapangidwe koyenera ka makina osindikizira kumafuna kusanthula kozama pakati pa zitsulo zovindikira ndi zitsulo zovindikira zachikhalidwe. Ngakhale kuti zitsulo zovindikira zimagwiritsa ntchito madzi ndi magetsi chifukwa cha mtengo wotsika, zitsulo zovindikira ndi njira yopangidwira malo ovuta kumene malire a elastomer amakhala mavuto ogwirira ntchito.

Kusiyana kwakukulu pa magwiridwe antchito ndi malire

Kusiyana kwakukulu pakati pa ukadaulo uwu kuli mu njira yachiwiri yotsekera. Zotsekera zopukutira zimagwiritsa ntchito mphete ya O-ring kapena V-ring yomwe iyenera kutsetsereka pa shaft kapena sleeve kuti igwirizane ndi kuvala kwa nkhope. Kuchita izi kumayambitsa kutsekeka kwa shaft—njira yowononga yotsekeka—ndipo imakhala yotetezeka kwambiri ngati madziwo apanga crystal. Zotsekeka zachitsulo zimagwiritsa ntchito zotsekeka zachiwiri zokhazikika (nthawi zambiri zimakhala zopaka graphite kapena mphete za O-ring zokhazikika), zomwe zimachotsa kutsekeka konse.

Monga momwe zafotokozedwera m'nkhaniyi, ma pusher seal amaletsedwa kwambiri ndi zigawo zake za elastomeric. Ngakhale ma perfluoroelastomer apamwamba kwambiri amawonongeka mofulumira kuposa 315°C (600°F), pomwe ma bellows opangidwa ndi m'mphepete opangidwa ndi ma alloy apamwamba amatha kugwira ntchito bwino kupitirira 400°C.

Nthawi yosankha zisindikizo za mpweya umodzi, ziwiri, katiriji, kapena zouma

Kapangidwe ka chisindikizo cha bellows chachitsulo kayenera kukonzedwa kuti kagwirizane ndi kuchuluka kwa ngozi ya madzi opangidwa. Zisindikizo za bellows chimodzi zimayikidwa pamadzi osakhala oopsa komanso otentha kwambiri monga mafuta otentha, komwe kutuluka pang'ono kwa nthunzi sikubweretsa chiopsezo ku chilengedwe kapena chitetezo.

Pa ntchito za VOC zoopsa, zoyaka moto, kapena zolamulidwa bwino, makonzedwe a chisindikizo chawiri ndi ofunikira. Chisindikizo chawiri chosapanikizika (API Plan 52) chimapereka njira yotetezera yosungiramo zinthu ndipo chimagwira mpweya woipa, pomwe chisindikizo chawiri chopanikizika (API Plan 53A/B/C) chimatsimikizira kuti palibe mpweya woipa mwa kusunga madzi oletsa mpweya pamphamvu yokwera kuposa madzi oyambitsa mpweya.Makonzedwe a katirijiAmakondedwa kwambiri pa mitundu yonseyi, chifukwa amakhazikitsa kale kupsinjika kwa bellows ku fakitale, kuchotsa zolakwika pakuyika pansi pa shopu. Zisindikizo za mpweya wouma zokhala ndi bellows zimagwiritsidwanso ntchito m'magwiritsidwe apadera a nthunzi pomwe madzi oletsa madzi ndi osavomerezeka.

Kufotokozera, Kukhazikitsa, ndi Kutsatira

Kukhazikitsa bwino, kuyika mosamala, komanso kutsatira miyezo yapadziko lonse lapansi ndikofunikira kwambiri kuti zisindikizo zamakina zopangidwa ndi zitsulo zisatulutse mpweya woipa. Chisindikizo chogwira ntchito bwino chidzalephera msanga ngati zowongolera zachilengedwe ndi mapulani a mapaipi sanapangidwe kuti athandizire ntchito yake yeniyeni.

Deta yofunika kwambiri yogwiritsira ntchito

Posankha chisindikizo cha bellows chachitsulo, mainjiniya ayenera kusanthula mfundo zingapo zofunika kwambiri kupatula kupanikizika ndi kutentha kokha. Kukhuthala kwa madzi ndikofunikira kwambiri; bellows zachitsulo nthawi zambiri zimayesedwa kuti zikhale ndi madzi mpaka 3,000 cSt. Kupitirira kukhuthala kumeneku popanda kutentha koyenera kungayambitse kudulidwa kwakukulu kwa torsional, zomwe zimapangitsa kuti bellows isungunuke panthawi yoyambitsa pampu.

Mphepete mwa mphamvu ya nthunzi ya madziwo iyeneranso kuwerengedwa kuti isagwedezeke pankhope zotsekera. Ngati madziwo atuluka nthunzi pakati pa nkhope zoyamba, amachititsa kuti madziwo ayambe kuyenda mouma, kutentha kwambiri, komanso kuwonongeka kwa nkhope nthawi yomweyo. Kuphatikiza apo, mphamvu yokoka komanso kupezeka kwa tinthu tating'onoting'ono tomwe timapachikidwa kumatanthauza ngati kapangidwe ka bellows kozungulira kapena kosasuntha kakufunika, chifukwa bellows zozungulira zimatha kudziyeretsa zokha kudzera mu mphamvu ya centrifugal koma zimangochepetsa liwiro.

Njira zabwino zokhazikitsira ndi kutsuka dongosolo

Kupambana kwa kukhazikitsa kumadalira kwambiri kukhazikitsa mapulani oyenera a API 682 flush. Pa ntchito zophikira zotentha kwambiri—njira yabwino kwambiri yogwiritsira ntchito zitsulo—API Plan 62 imagwiritsidwa ntchito nthawi zambiri. Ndondomekoyi imayambitsa chozimitsira nthunzi chotsika mphamvu kumbali ya mlengalenga ya chisindikizo, kuletsa okosijeni ndi kuuma kwa madzi omwe amalowa m'maso.

Pogwiritsa ntchito makonzedwe awiri opanikizika (Plan 53A kapena 53B), dongosolo lamadzimadzi otchingira liyenera kusamalidwa mosamala. Njira zabwino zimati kuthamanga kwamadzimadzi otchingira kuyenera kukhala kosasunthika pang'ono pa kusiyana kwa 1.5 mpaka 2.0 bar (22 mpaka 29 psi) kuposa kuthamanga kwakukulu kwa bokosi lodzaza. Kulephera kusunga kusiyana kumeneku kudzapangitsa kuti madzimadzi abwererenso mu dongosolo lotchingira, kuipitsa chisindikizo ndikuyika pansi lamulo la zero-emissions.

Zofunikira zokhudzana ndi API, ISO, ndi mpweya woipa

Kutsatira miyezo yapadziko lonse lapansi ya uinjiniya kumatsimikizira kuti zisindikizo zachitsulo zimakwaniritsa miyezo yodalirika. American Petroleum Institute (API) Standard 682 (Kope Lachinayi) ndi ISO 21049 zimapereka njira zotsimikizika zoyeneretsera zisindikizo. Pansi pa API 682, zisindikizo zachitsulo zimagwera makamaka m'magulu a Type B (zozungulira) ndi Type C (zosasunthika).

Pa mapampu a Gulu 2 ndi 3 omwe amagwira ntchito mu ntchito zofunika kwambiri zoyeretsera, ma bellows a Type C nthawi zambiri amalamulidwa kuthana ndi liwiro lalikulu la shaft komanso zolakwika zazikulu. Kukwaniritsa zofunikira za API izi kumatsimikizira kuti chisindikizocho chayesedwa bwino, kuonetsetsa kuti chikutsatira zofunikira zoletsa kutulutsa mpweya, monga kusunga kutayikira kwa VOC pansi pa 500 ppm kwa nthawi yosalekeza yogwira ntchito ya maola osachepera 25,000.

Momwe Mungayesere ndi Kusankha Chisindikizo Choyenera

Kuwunika ndikusankha chisindikizo cha makina choyenera cha bellows chachitsulo kumafuna kulinganiza malire a thermodynamic, kuyanjana kwa mankhwala, ndi ndalama zonse za moyo. Magulu opanga zinthu zodalirika ayenera kupitirira mitengo yoyambira kugula kuti awone momwe zosankha zachitsulo ndi zomangamanga za zisindikizo zingakhudzire nthawi yayitali yogwira ntchito ya zida.

Zofunikira pakusankha ogwiritsa ntchito kumapeto

Kwa ogwiritsa ntchito, kusankha zitsulo zoteteza ndiye chisankho chofunikira kwambiri, chifukwa chimadalira kukana dzimbiri komanso nthawi yogwira ntchito yotopa ndi makina. Zitsulo zosapanga dzimbiri zokhazikika nthawi zambiri sizikwanira kugwiritsidwa ntchito m'mafakitale amphamvu.

Monga momwe zasonyezedwera mu metallurgical selection matrix, Inconel 718 ndiye muyezo wamakampani ogwiritsa ntchito mafakitale otentha kwambiri, zomwe zimapereka mphamvu yabwino kwambiri yotopa. Hastelloy C-276 imatchulidwa pamene njirayi ili ndi kuchuluka kwa ma chloride kapena hydrogen sulfide, zomwe zingayambitse kusweka kwa dzimbiri mwachangu mu ma alloys ocheperako.

Malangizo omaliza a magulu okonza ndi kudalirika

Magulu okonza ndi odalirikaayenera kuwunika kusankha chisindikizo pogwiritsa ntchito njira ya Total Cost of Ownership (TCO). Ngakhale chisindikizo chachitsulo chopangidwa bwino, chokhala ngati katiriji, chimakhala ndi mtengo wapakati pa 20% mpaka 30% kuposa chisindikizo chofananira, kuchotsa kusintha kwa shaft sleeve ndi kuchepetsa nthawi yopuma yosakonzekera kumathetsa ndalama zoyambira izi.

Malangizo omaliza a mapulogalamu odalirika amaphatikizapo kukhazikitsa zizindikiro zokhwima zogwirira ntchito (KPIs) za zida zozungulira.

Mfundo Zofunika Kwambiri

• Zomaliza zofunika kwambiri ndi zifukwa zomveka za Zisindikizo za Mechanical za Metal Bellows
• Mafotokozedwe, kutsata malamulo, ndi macheke owopsa oyenera kutsimikiziridwa musanachite izi
• Njira zotsatila zogwira mtima komanso machenjezo omwe owerenga angagwiritse ntchito nthawi yomweyo

Mafunso Ofunsidwa Kawirikawiri

N’chifukwa chiyani zisindikizo zamakina zothira zitsulo zimatuluka pang’ono poyerekeza ndi zisindikizo zothira?

Amachotsa mphete ya O yomwe imadutsa, njira yodziwika bwino yotulutsira madzi. Miyendo yachitsulo yolumikizidwa imapereka mawonekedwe ofanana komanso chisindikizo chachiwiri chosasinthika, kuchepetsa kutsekeka, kutsekeka, ndi kutulutsa mpweya wotuluka.

Kodi ndiyenera kusankha liti chisindikizo cha makina chopangidwa ndi chitsulo?

Sankhani kuti mugwiritse ntchito pa kutentha kwambiri, kuwononga, kuphika, kapena kupangira ma crystallizing komwe ma elastomer amalephera. Ndi othandiza makamaka pakugwiritsa ntchito mankhwala, mafuta ndi gasi, mphamvu, ndi mapampu am'madzi.

Kodi zisindikizo zamakina zopangidwa ndi zitsulo zimathandiza kuti pasakhale mpweya woipa?

Inde. Ma bellow awo olumikizidwa ndi mpweya komanso kutseka kwachiwiri kosasinthasintha kumathandiza kuti kutayikira kwa VOC kukhale kochepa kwambiri, kuthandizira zolinga zolimba zotulutsa mpweya m'mafakitale komanso mapulogalamu osamalira omwe amayang'ana kwambiri kutsatira malamulo.

Kodi ndi malire ati ogwirira ntchito omwe ogula ayenera kuyang'ana asanasankhe imodzi?

Tsimikizirani kutentha kwa ndondomeko, kupanikizika, kuwononga kwa media, kuyenda kwa shaft, ndi chitsanzo cha pampu. Mapangidwe wamba nthawi zambiri amafanana ndi kupsinjika pang'ono, pomwe ma bellows okhala ndi ma ply ambiri amagwiritsidwa ntchito pa ntchito zopanikizika kwambiri.

Kodi Victor Seals imapereka zisindikizo zachitsulo zogwirizana ndi OEM zamapampu a mafakitale?

Inde. Victor Seals imapanga zisindikizo zamakina zopangidwa ndi zitsulo komanso zosintha zomwe zimagwirizana ndi OEM pazosowa zambiri zosamalira mapampu, kuphatikizapo mitundu monga Grundfos, IMO, Alfa Laval, ndi Allweiler.