Kodi Chisindikizo cha Elastomer Bellow Mechanical ndi Chiyani?

Kodi Chisindikizo cha Elastomer Bellow Mechanical ndi Chiyani?

Elastomer ikulirachisindikizo chamakinandi chipangizo chapadera kwambiri chotsekera kumapeto kwa nkhope chomwe chapangidwa kuti chigwiritsidwe ntchitozida zozungulira, makamaka mapampu a centrifugal, zosakaniza, ndi zoyambitsa. Mosiyana ndi zotsekera zachikhalidwe zomwe zimadalira mphete za O kapena mphete za V zomwe zimatsetsereka pa shaft, kapangidwe kameneka kamagwiritsa ntchito chubu chozungulira cha elastomeric—chomwe chili pansi—kuti chigwirizane ndi mpata pakati pa shaft yozungulira ndi nkhope yotsekera yoyamba. Kapangidwe kameneka kamachotsa kufunikira kwa chisindikizo chachiwiri chotsetsereka, motero kuchepetsa kutsekeka kwa shaft ndi kulephera kokonzanso komwe kumabwera chifukwa cha izi.

Zisindikizo zokhazikika za elastomer bellow nthawi zambiri zimapangidwa kuti zikhale ndi mainchesi a shaft kuyambira 10 mm mpaka 100 mm, ngakhale kuti pali miyeso yapadera ya zida zapadera zamafakitale. Mwa kuphatikiza ntchito yachiwiri yotsekera, kutumiza kwa rotational drive, ndi kusinthasintha kwa axial kukhala gawo limodzi la polymeric, mainjiniya amatha kupeza njira yotsekera yolimba, yaying'ono, komanso yothandiza kwambiri yoyenera machitidwe osiyanasiyana ogwiritsira ntchito madzi otsika mpaka apakati.

Zigawo zazikulu ndi mfundo yogwirira ntchito

Kapangidwe ka chisindikizo cha makina chozungulira cha elastomer chili pakati pa zigawo zinayi zazikulu: mphete yozungulira, mphete yolumikizira yosasuntha, mphete yolumikizira ya elastomer yokha, ndi makina osinthira masika. Mphete zoyambira ndi zolumikizirana zimapanga mawonekedwe olumikizirana oyambira, olumikizidwa mpaka kusalala komwe nthawi zambiri kumayesedwa mu mikanda ya kuwala ya helium kuti zitsimikizire kufanana kwa microscopic. Nkhope izi zimalekanitsidwa kokha ndi filimu yamadzimadzi ya hydrodynamic yopangidwa ndi chopopera.

Kasupe wamakina—nthawi zambiri amakhala kasupe wokhazikika wa coil umodzi—amakhala kumbuyo kwa nkhope yoyamba. Amapereka mphamvu yofunikira yotsekera kuti azitha kulumikizana ndi nkhope panthawi yoyambira zida, kuzimitsa, komanso nthawi ya kupsinjika kochepa kwa makina. Chifukwa kasupe nthawi zambiri amakhala kunja kwa madzi opopera kapena kutetezedwa ndi pansi, samakhala pachiwopsezo chotseka kapena dzimbiri poyerekeza ndi akasupe ang'onoang'ono angapo omwe amapezeka m'mapangidwe ena a pusher seal.

Momwe pansi pake pamapereka kutseka kwachiwiri komanso kusinthasintha

Chizindikiro chachikulu cha gulu la chisindikizo ichi ndi magwiridwe antchito awiri a bellow. Pa mawonekedwe a shaft, kumapeto kwa elastomer bellow kumakhala ndi kusakanikirana. Kugwira kolimba kumeneku kumagwira ntchito ngati chisindikizo chachiwiri motsutsana ndi shaft, kuletsa kupitirira kwa madzi pomwe nthawi yomweyo kumatumiza mphamvu yozungulira kumaso otsekera oyamba popanda kufunikira zomangira kapena ma drive pini.

Pachimake, ma convolutions a bellow amapereka kusinthasintha kwakukulu. Pamene nkhope zoyambira za seal zikuwonongeka mosalekeza kwa maola masauzande ambiri ogwira ntchito, bellow imatambasuka kuti ikhale yolumikizana. Bellow yokhazikika ya elastomer nthawi zambiri imatha kubweza mpaka 2.0 mm ya axial play kapena face clothing. Kuphatikiza apo, kusinthasintha kumeneku kumayamwa kusokonekera kwa angular ndi shaft run, kuonetsetsa kuti nkhope zoyamba zikupitirirabe kufanana ndipo filimu ya hydrodynamic imakhalabe yokhazikika pansi pa mikhalidwe yogwira ntchito.

Chifukwa Chake Elastomer Bellow Mechanical Seals Ndi Yofunika

Kufunika kwa ma elastomer bellow mechanical seals m'mafakitale kumachokera ku luso lawo lapadera lothana ndi mavuto odalirika omwe amapezeka m'mapangidwe a O-ring osinthasintha. M'malo ogwiritsira ntchito madzi, kudalirika kwa zida zozungulira kumagwirizana mwachindunji ndi umphumphu wa ma shaft seals ake. Ma elastomer bellows amathetsa zomwe zimayambitsa kulephera kwa chisindikizo msanga, zomwe zimapangitsa kuti nthawi yayitali yogwirira ntchito ichedwe komanso kuchepetsa ndalama zokonzera.

Chifukwa chakuti zisindikizo zimenezi zimayendetsa nkhope yozungulira kudzera mu kukangana kosasinthasintha kwa shaft, zimachotsa vuto la kukangana kwa shaft. Kukangana kumachitika pamene mphete ya O-ring yosinthasintha imasuntha mosalekeza kumbuyo ndi mtsogolo kudzera mu shaft chifukwa cha kugwedezeka kapena kuwonongeka kwa nkhope, pamapeto pake kukumba shaft kapena sleeve. Mwa kuchotsa njira yolephera iyi, zipangizo zimapewa njira yokwera mtengo komanso yowononga nthawi yosintha kapena kukonzanso ma pump shaft.

Momwe zimakhudzira kuwongolera kutayikira kwa madzi

Kuwongolera kutuluka kwa madzi m'makaniko kumadalira kusunga kulumikizana kosalekeza pakati pa nkhope zoyambira. Makaniko opukutira achikhalidwe amatha "kupachikidwa," vuto lomwe mphete yamphamvu ya O imamatira pa shaft chifukwa cha kuchuluka kwa zinyalala, kupanga mamba, kapena kufalikira kwa malo. Pamene kupachikidwa, kasupe wamkati sungakankhire nkhope yoyambira patsogolo kuti ibwezeretse kuwonongeka, zomwe zimapangitsa kuti pakhale kutayikira kwakukulu.

Zisindikizo za Elastomer bellow sizimalendewera chifukwa chisindikizo chachiwiri sichimalendewera poyerekeza ndi shaft. Kupindika kwa bellow nthawi zonse kumathandizira kuwonongeka kwa nkhope ndi shaft popanda kufunikira kuti gawo lililonse lisunthike. M'makina ogwirizana bwino omwe amagwira ntchito mkati mwa magawo omwe atchulidwa, kapangidwe kameneka kamasunga mpweya wotuluka ndi kutuluka kwa madzi pansi pa 0.1 mL/ola, kuonetsetsa kuti malamulo okhwima okhudza chilengedwe ndi chitetezo akutsatira.

Ntchito zodziwika bwino komanso zochitika zogwiritsidwa ntchito

Zisindikizo zimenezi zimapezeka paliponse m'mafakitale omwe amafuna kudalirika kwambiri pogwiritsa ntchito njira zogwirira ntchito pang'ono. Ndiwo njira yodziwika bwino yogwiritsira ntchitokuyeretsa madzi ndi madzi otayira m'matauni, mapampu oyendera madzi a HVAC, makina osefera madzi a dziwe losambira ndi spa, komanso kukonza chakudya ndi zakumwa komwe kumafunika kugwiritsa ntchito mankhwala pang'ono. Kulimba kwawo kumawapangitsa kukhala oyenera kwambiri madzi osakhala a Newtonian kapena zinthu zomwe zili ndi tinthu tating'onoting'ono.

Popeza palibe chisindikizo chachiwiri chosinthasintha chomwe chimatsekeka, zisindikizo za elastomer bellow zimatha kugwira bwino madzi okhala ndi zinthu zolimba zopachikidwa mpaka 10% polemera, bola ngati nkhope zoyambira za zisindikizo zimapangidwa ndi zinthu zolimba monga Silicon Carbide kapena Tungsten Carbide. Mphamvu yosamalira zinyalalazi imapangitsa kuti zikhale zofunikira kwambiri m'mapampu olowetsa madzi osaphika komanso njira zothirira zaulimi komwe kulibe kutsimikizika kwa kuyera kwa madzi.

Momwe Zisindikizo Zamakina za Elastomer Bellow Zimafananira ndi Zisindikizo Zina

Kusankha chisindikizo choyenera cha makina kumafuna kumvetsetsa kusiyana pakati pa ukadaulo wosiyanasiyana wotsekera. Zisindikizo za elastomer bellow zimakhala pakati pa zisindikizo zotsika mtengo komanso zosamalira bwino komanso zisindikizo zachitsulo zotsika mtengo komanso zodula kwambiri.

Ngakhale kuti amapereka ubwino waukulu kuposa zisindikizo zopukutira za O-ring pankhani yodalirika komanso kusungidwa kwa shaft, zimalepheretsedwa ndi zofooka zakuthupi za zipangizo za elastomeric zomwe zimapangidwa. Kuwunika kusiyana kumeneku ndikofunikira kwambiri kwa mainjiniya omwe ali ndi ntchito yokonza kudalirika kwa mafakitale ndikuwongolera bajeti yogulira.

Kusiyana kwakukulu kwa magwiridwe antchito

Kusiyana kwakukulu pakati pa mitundu ya zisindikizo kuli mu momwe zimayankhira ku mphamvu za shaft ndi mikhalidwe yoopsa ya ntchito. Zisindikizo zopukutira ndi zotsika mtengo koma zimapachikidwa mosavuta komanso zimaphwanyidwa. Zisindikizo zachitsulo zopindika m'mphepete, zopangidwa ndi zitsulo monga Hastelloy kapena Inconel, zimachotsa zisindikizo ndipo zimatha kupirira kutentha kwambiri (nthawi zambiri kupitirira 400°C), koma zimakhala ndi mtengo waukulu womwe ungakhale wokwera kakhumi mpaka makumi awiri kuposa njira zina za elastomeric.

Monga momwe zasonyezedwera mu matrix yoyerekeza, zisindikizo za elastomer bellow zimapereka ubwino wogwirira ntchito wa kapangidwe ka bellow kosavutikira popanda ndalama zambiri za bellows zachitsulo, zomwe zimapangitsa kuti zikhale chisankho chabwino kwambiri pa ntchito zambiri zotumizira madzi.

Kuthamanga, kutentha, ndi kuyanjana kwa mankhwala

Chivundikiro chogwirira ntchito cha elastomer bellow seal chimayendetsedwa ndi kapangidwe ka polima ka bellow. Nitrile Rubber (NBR) ndi yokhazikika pamadzi ndi mafuta ofatsa, yomwe imapereka kutentha kwakukulu kogwira ntchito kosalekeza kwa pafupifupi 90°C. Ethylene Propylene Diene Monomer (EPDM) imakulitsa malire awa mpaka 120°C ndipo imapereka kukana bwino madzi otentha, nthunzi, ndi alkalis ofatsa, ngakhale kuti imawonongeka mofulumira pamaso pa madzi ochokera ku mafuta.

Pa mankhwala amphamvu kwambiri kapena kutentha kwambiri, ma elastomer a Fluorocarbon (FKM/Viton) amagwiritsidwa ntchito, zomwe zimapangitsa kuti kutentha kukhale koyenera kufika pa 200°C. Kuchepa kwa kuthamanga kwa magazi n'kofunika kwambiri; chifukwa elastomer bellow ndi polima wosinthasintha, imatha kuphulika kapena kutuluka chifukwa cha kuthamanga kwambiri kwa makina. Chifukwa chake, ma seal ambiri osagwiritsidwa ntchito a elastomer bellow amawerengedwa kuti ali ndi kuthamanga kwakukulu pakati pa 12 ndi 16 bar (1.2 mpaka 1.6 MPa). Kupitirira malire awa kumafuna kusintha kupita ku kapangidwe koyenera ka seal kapena bellow yachitsulo.

Kusankha, Kukhazikitsa, ndi Zinthu Zogwirira Ntchito

Kugwiritsidwa ntchito bwino kwa chisindikizo cha makina cha elastomer bellow kumadalira kwambiri njira zosankhira bwino komanso miyezo yokhazikika yokhazikitsa. Ngakhale chisindikizo chopangidwa bwino kwambiri chidzalephera msanga ngati magawo amadzimadzi a njira apitirira zomwe zikufunika, kapena ngati njira zabwino kwambiri zamakina zinyalanyazidwa panthawi yopangira.

Mainjiniya ndiakatswiri okonza zinthuayenera kugwiritsa ntchito njira yosinthira chisindikizo ngati njira yowongoleredwa kwambiri, kuwunika malire a thermodynamic ndikuwonetsetsa kuti nyumba ya pampu ndi shaft zikukwaniritsa zolekerera zolimba za mawonekedwe ndi mawonekedwe a pamwamba.

Momwe mungayesere madzi, kutentha, ndi kuthamanga

Kuyesa magawo a njira kumafuna kuwerengera PV (Pressure-Velocity), yomwe imayimira kutentha kwa frictional komwe kumapangidwa pankhope za seal. Pa seal yokhazikika ya elastomer bellow pogwiritsa ntchito Carbon graphite motsutsana ndi nkhope za Aluminium Oxide (Ceramic), malire ogwirira ntchito nthawi zambiri amakhala pafupifupi 10 mpaka 15 MPa·m/s. Ngati pampu ikugwira ntchito pa liwiro lalikulu kapena kupanikizika kwakukulu komwe kumapitirira malire a PV awa, filimu yamadzimadzi idzasanduka nthunzi, zomwe zimapangitsa kuti elastomer iume komanso kutentha kwake kuwonongeke mwachangu.

Kuwunika kwa madzimadzi kuyeneranso kuganizira momwe zinthu zilili nthawi yochepa. Madzi omwe ndi abwino pa 20°C akhoza kuwononga kwambiri elastomer yosankhidwa pa 80°C. Kuphatikiza apo, madzi omwe amaundana akazizira kapena kuwonetsedwa mumlengalenga amatha kulimbitsa pansi pomwe pampu yatsekedwa, ndikung'amba polima pamene zida ziyambiranso. Pazochitika zotere, kuletsa ndi kutulutsa madzi kungafunike.

Machitidwe okhazikitsa ndi njira zodziwika bwino zolephera

Machitidwe okhazikitsa amalamulira mwachindunji nthawi ya chisindikizo.shaft ya pampu iyenera kukhala yopanda ma burrs, mikwingwirima, ndi m'mbali zakuthwa zomwe zingadule mainchesi amkati mwa pansi poikamo. Miyezo yamakampani imafuna kuti shaft imalize bwino pakati pa Ra 0.8 ndi 1.2 µm kuti isindikize bwino komanso kuti ipereke mphamvu.

Njira yofala kwambiri yolephera ndi kung'ambika kwa bellow, komwe nthawi zambiri kumachitika chifukwa cha mafuta osayenera panthawi yopangira. Akatswiri ayenera kugwiritsa ntchito mafuta ogwirizana ndi elastomer yeniyeni; mwachitsanzo, kugwiritsa ntchito mafuta opangidwa ndi mafuta pa bellow ya EPDM kungapangitse kuti rabara itukuke, ifewe, ndipo pamapeto pake ilephereke chifukwa cha mphamvu yozungulira. Kugwiritsa ntchito mafuta ovomerezeka a silicone kapena madzi osavuta a sopo ndikofunikira kuti zitsimikizire kuti mipando ya bellow ndi yoyenera popanda kupotoza.

Miyezo, malire, ndi ziyeneretso za ogulitsa

Kuti zitsimikizire kuti zimasinthana komanso kuti zigwire ntchito bwino, ogula ayenera kusankha zisindikizo zomwe zimagwirizana ndi miyezo yodziwika bwino, makamaka EN 12756 (yomwe kale inali DIN 24960). Kutsatira miyezo imeneyi kumatsimikizira kuti chisindikizocho chidzalowa m'mabokosi odzaza mapampu okhazikika popanda kufunikira makina opangidwa mwapadera kapena mbale zapadera za gland.

Kuyenerera kwa ogulitsa ndikofunikira kwambiri.Ogula mafakitaleayenera kulamula kuti opanga zisindikizo akhale ndi satifiketi ya ISO 9001 ndipo akhoza kupereka kutsata kwa zinthu za elastomers ndi zinthu za nkhope. Opanga apamwamba nthawi zambiri amakhala ndi zilema zopanga zosakwana 0.5%. Kupempha deta ya statistical process control (SPC) kuti nkhope ikhale yosalala komanso yokhazikika kungateteze kwambiri kuti asalandire zinthu zosafunikira.

Momwe Ogula Ayenera Kusankhira

Kugula zisindikizo zamakina za elastomer pansi pa makina kumafuna mgwirizano pakati pa ndalama zomwe zimagwiritsidwa ntchito pasadakhale komanso kudalirika kwa ntchito kwa nthawi yayitali. Ngakhale kuti zisindikizo zimenezi nthawi zambiri zimaonedwa ngati zinthu zogwiritsidwa ntchito, kuziona ngati chinthu chotsika mtengo kungayambitse nthawi yochuluka yokonza komanso kukwera mtengo kwa umwini (TCO).

Ogula ayenera kuwunika zomwe akufuna pa gulu lawo la zida zozungulira ndikukhazikitsa njira zogulira zomwe zimayika patsogolo Mean Time Between Failures (MTBF) kuposa ndalama zochepa zomwe zimagwiritsidwa ntchito poyambira. Ndondomeko yokonzekera zisankho imatsimikizira kuti zofunikira za chisindikizo zikugwirizana ndi zolinga zodalirika za fakitale.

Zofunikira pa kugula ndi nthawi ya moyo wa chinthu

Mtengo woyamba wogulira chisindikizo cha elastomer umadalira kwambiri kuchuluka kwa zinthu ndi kapangidwe kake. Zisindikizo za NBR/Carbon/Ceramic zomwe zimagulidwa m'ma voliyumu ambiri (Minimum Order Quantities of 100 to 500 units) zimatha kukhala zotsika mtengo ngati $10 mpaka $50 pa unit iliyonse. Komabe, kusinthira ku zipangizo zapamwamba monga Silicon Carbide (SiC) kapena Tungsten Carbide (TC) kuti zithetse kuwonongeka kwa abrasive kudzawonjezera mtengo wake ndi 30% mpaka 50%.

Monga momwe matrix ya mtengo wa moyo ikusonyezera, kukwera pang'ono kwa mtengo woyambira wogulira zinthu zolimba komanso ma elastomer olimba kwambiri kumatsimikiziridwa mosavuta ndi kukulitsa kwakukulu mu MTBF.

Mfundo Zofunika Kwambiri

• Zomaliza zofunika kwambiri ndi zifukwa zomveka za Elastomer Bellow Mechanical Seal
• 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

Kodi chisindikizo cha makina chopangidwa ndi elastomer bellow chimagwiritsidwa ntchito pa chiyani?

Imatseka zida zozungulira monga mapampu a centrifugal, zosakaniza, ndi zoyambitsa, makamaka mu ntchito zopanikizika zochepa mpaka zapakati komwe kumafunika kuwongolera kodalirika kwa kutayikira kwa madzi ndi kukonza kosavuta.

Kodi chisindikizo cha elastomer bellow chimasiyana bwanji ndi chisindikizo cha pusher?

Imagwiritsa ntchito chofewa chofewa cha elastomer m'malo mwa mphete yachiwiri ya O-ring, yomwe imathandiza kupewa kugwedezeka kwa shaft, kuchepetsa chiopsezo chopachikidwa, komanso kupangitsa kuti ntchito ikhale yosavuta m'madzi odetsedwa kapena ozungulira.

Kodi ubwino waukulu wa elastomer bellow mechanical seals ndi wotani?

Amapereka kapangidwe kakang'ono, zida zochepa zosuntha zomwe sizimasuntha, zimathandizira kuwonongeka bwino, komanso zimateteza bwino ku kutuluka kwa madzi komwe kumachitika chifukwa cha kumamatira kwa O-ring pa shaft.

Ndi mafakitale ati omwe nthawi zambiri amagwiritsa ntchito zisindikizo za elastomer bellow?

Amagwiritsidwa ntchito kwambiri pokonza madzi, kukonza mankhwala, machitidwe am'madzi, zamkati ndi mapepala, malo opangira magetsi, komanso kukonza mapampu amafakitale.

Kodi Victor Seals angapereke zisindikizo zosinthira za elastomer pa mapampu a OEM?

Inde. Victor Seals imapereka zinthu zina zosinthika ndi elastomer zomwe zimagwirizana ndi OEM m'mafakitale monga Grundfos, Flygt, Alfa Laval, IMO, Lowara, ndi Allweiler kuti zikonzedwe ndi kukonzedwa.