Chii Chinonzi Elastomer Bellow Mechanical Seal?

Chii Chinonzi Elastomer Bellow Mechanical Seal

Elastomer inorirachisimbiso chemuchinamudziyo wekusimbisa magumo une hunyanzvi hwakanyanya wakagadzirwa kuti uvharemichina inotenderera, kunyanya mapombi e centrifugal, ma mixers, uye ma agitators. Kusiyana nezvisimbiso zvechinyakare zvinoshandisa ma O-rings anoshanduka kana ma V-rings anotsvedza pamwe chete ne shaft, dhizaini iyi inoshandisa chubhu ine elastomeric yakavharika—iri pasi—kuvhara mukaha uri pakati pe rotating shaft nechiso chekutanga che sealing. Iyi dhizaini inobvisa kudiwa kwechisimbiso chechipiri chinotsvedza, nokudaro ichideredza shaft fretting uye kutadza kugadzirisa kwakabatana nako.

Zvisimbiso zve bellow zve elastomer zvinowanzogadzirwa zve shaft diameters dzinotangira pa 10 mm kusvika pa 100 mm, kunyange zvazvo paine zviyero zvakagadzirwa zvemaindasitiri chaiwo. Nekubatanidza secondary sealing function, rotational drive transmission, uye axial flexibility kuita chimwe chinhu che polymeric, mainjiniya vanogona kuwana nzira yakasimba, yakamanikana, uye inoshanda zvakanyanya ye sealing mechanism yakakodzera kune akawanda ma low-to-medium pressure fluid handling systems.

Zvikamu zvepakati uye musimboti wekushanda

Magadzirirwo e elastomer bellow mechanical seal ari pakati pezvikamu zvina zvikuru: denderedzwa rekutanga rinotenderera, denderedzwa rinogara riripo, denderedzwa rinobuda riripo, uye mechanical spring mechanism. Mhete dzekutanga nedzekubatanidza dzinoumba primary sealing interface, dzakanamirwa kusvika pahutete hwakati sandara hunowanzo enzaniswa ne helium light bands kuti dzive nechokwadi chekuti microscopic conformity. Zviso izvi zvinongoparadzaniswa chete ne hydrodynamic fluid film inogadzirwa ne pomped medium.

Chitubu chemuchina—chinowanzova chitubu chimwe chete chakasimba checoil—chinoiswa kumashure kwechiso chekutanga. Chinopa simba rekuvhara rinodiwa kuti chirambe chichibatana pachiso panguva yekutanga michina, kudzima, uye nguva yekumanikidzwa kwakaderera kwesystem. Nekuti chitubu chinowanzoiswa kunze kwemvura inopombwa kana kudzivirirwa nepasi, hachinyanyi kuvharika kana ngura kana tichienzanisa nemasipuresi madiki akawanda anowanikwa mune mamwe magadzirirwo e pusher seal.

Maitiro ekuisa pasi pebhiriji pakuvhara kwechipiri uye kuchinjika

Chinhu chinonyanya kukosha muchikamu ichi chechisimbiso ndechekuti chinoshanda kaviri. Pachikamu cheshaft, magumo emusana we elastomer bellow ane kupindirana. Iyi tight static grip inoshanda sechipiri chisimbiso pashaft, ichidzivirira fluid bypass ukuwo ichitumira rotational torque kumeso ekutanga kwechisimbiso pasina chikonzero che set screws kana drive pins.

Mukati, mitsetse yebellow inopa kuchinjika kwakakosha. Sezvo zviso zvechisimbiso chekutanga zvichikuvara zvisingadzivisike mukati memaawa zviuru zvekushanda, bellow inotambanuka kuti irambe ichibata. Bellow yakajairika ye elastomer inogona kutsiva kusvika 2.0 mm yekutambisa kana kupfeka kwechiso. Uyezve, kuchinjika uku kunotora kukanganisa kwemakona uye kumhanya kwemugodhi, zvichiita kuti zviso zvekutanga zvirambe zvakafanana uye firimu re hydrodynamic rirambe rakagadzikana pasi pemamiriro ekushanda anochinja.

Nei Elastomer Bellow Mechanical Seals Ichikosha

Kukosha kwemaindasitiri kwe elastomer bellow mechanical seals kunobva mukukwanisa kwavo kugadzirisa matambudziko ekuvimbika kwenguva refu ari mumagadzirirwo eO-ring anoshanduka. Munzvimbo dzinobata mvura, kuvimbika kwemidziyo inotenderera kunoenderana zvakananga nekusimba kwe shaft seals dzayo. Elastomer bellows inotarisa zvikonzero zvekutadza kushanda kwechisimbiso nguva isati yakwana, zvichishandura zvakananga kuita nguva yakareba yekushanda uye kuderedzwa kwemari yekugadzirisa.

Nekuti ma seal aya anofambisa chiso chinotenderera kuburikidza nekukweshana kwepasi peshaft, anobvisa chiitiko chekukwesha shaft. Kukwesha kunoitika kana O-ring inotenderera ichiramba ichitsvedza ichidzokera shure nekudzoka pamwe chete neshaft nekuda kwekuzunguzika kana kusakara kwechiso, zvichizopedzisira zvavhara shaft kana sleeve. Nekubvisa nzira iyi yekukundikana, zvivakwa zvinodzivirira maitiro anodhura uye anotora nguva yekutsiva kana kugadzirisa mapombi epombi.

Maitiro azvinoita pakudzora kubuda kwemvura

Kudzora kubuda kwemvura mumaseal emakanika kunoenderana nekuchengetedza kubatana kusingadzoreki pakati pezviso zvekutanga. Zviseal zvechinyakare zvinosundidzira zvinogona "kurembera," mamiriro ezvinhu apo O-ring inoshanduka inonamira pamugodhi nekuda kwekuunganidzwa kwemarara, kuumbwa kwemakero, kana fretting iri munzvimbo. Kana kurembera kwaitika, chitubu chemukati hachigone kusundidzira chiso chekutanga mberi kuti chigadzirise kusakara, zvichikonzera kubuda kwemvura kwakaipisisa.

Zvisimbiso zveElastomer bellow hazviregi kusungirirwa nekuti chisimbiso chechipiri hachina kumira kana tichienzanisa neshaft. Kuchinjika kwebellow kunogara kuchibvumira kupfeka kwechiso uye kufamba kweshaft pasina kuda kuti chimwe chinhu chitsvedzerere. Mumasisitimu akarongeka zvakanaka anoshanda mukati memiganhu yakatarwa, dhizaini iyi inochengetedza mwero wekubuda kwemhepo uye kubuda kwemvura pasi pe0.1 mL/awa, zvichiita kuti pave nekutevedzwa kwemitemo yakasimba yezvakatipoteredza uye yekuchengetedza.

Mashandisirwo akajairika uye mashandisirwo

Zvisimbiso izvi zvinowanikwa kwose kwose mumaindasitiri anoda kuvimbika kwakanyanya pasi pematanho ekushanda ari pakati nepakati. Ndiwo sarudzo yakajairika yekugadziriswa kwemvura yekanzuru nemvura yakasviba, pombi dzeHVAC dzinotenderera, masisitimu ekusefa dziva rekushambira nespa, uye kugadzirwa kwechikafu nezvinwiwa uko kunodiwa kuti zvienderane nemakemikari zvine mwero. Kusimba kwazvo kunoita kuti zvinyatsokodzera mvura dzisiri dzeNewtonian kana zvinhu zvine tunhu tudiki.

Nekuti hapana chisimbiso chechipiri chinotsvedza chinovhara, zvisimbiso zve elastomer zvinokwanisa kubata zvinobudirira mvura ine zvinhu zvakasimba zvakasungirirwa zvinosvika 10% nehuremu, chero bedzi zvisimbiso zvekutanga zvakagadzirwa nezvinhu zvakaoma seSilicon Carbide kana Tungsten Carbide. Kugona uku kubata marara kunoita kuti zvive zvakakosha mumapombi emvura isina kubikwa uye masisitimu ekudiridza ekurima uko kuchena kwemvura kusingavimbiswe.

Mashandisirwo Ezvinoitwa neElastomer Bellow Mechanical Seals nezvimwe Zvisimbiso

Kutsanangura chisimbiso chemuchina chakakodzera kunoda kunzwisisa kutengeserana pakati pematekinoroji akasiyana ekuvhara. Zvisimbiso zveElastomer zvine mutengo wakaderera, zvinogadziriswa zvakanyanya uye zvisimbiso zvesimbi zvine mutengo wakakwira, zvinodhura zvakanyanya.

Kunyange zvazvo zvichipa mabhenefiti makuru kupfuura zvisimbiso zveO-ring pusher zvakajairika maererano nekuvimbika uye kuchengetedzwa kwemugodhi, zvinodziviswa nekushomeka kwezvinhu zve elastomeric zvakavakirwa kubva mazviri. Kuongorora misiyano iyi kwakakosha kumainjiniya vane basa rekugadzirisa kuvimbika kwemiti uye kudzora bhajeti rekutenga.

Kusiyana kukuru kwekushanda

Musiyano mukuru pakati pemhando dzezvisimbiso uri mukupindura kwadzo kumamiriro ekushanda kweshaft uye mamiriro ekushanda akanyanya. Zvisimbiso zvePusher hazvidhuri asi zvinokasira kusungirirwa kana kupwanyika. Zvisimbiso zvesimbi zvakasungirirwa nemucheto, zvakagadzirwa nesimbi dzakaita seHastelloy kana Inconel, zvinobvisa ma "fretting" uye zvinogona kutsungirira kupisa kwakanyanya (kazhinji zvichipfuura 400°C), asi zvine mutengo wemari unogona kukwira kagumi kusvika makumi maviri kupfuura dzimwe nzira dze elastomeric.

Sezvakaratidzwa mukuenzanisa, zvisimbiso zve elastomer zvinopa mabhenefiti ekushanda kwedhizaini ye bellow isina kuzara pasina mari yakawanda yesimbi, zvichiita kuti zvive sarudzo yakanakisisa kune akawanda mashandisirwo ekutamisa mvura.

Kuenderana kwedzvinyiriro, tembiricha, uye makemikari

Kushanda kwe elastomer bellow seal kunotsamira zvakanyanya pakuumbwa kwe polymer kwe bellow. Nitrile Rubber (NBR) ndiyo yakajairika yemvura nemafuta akapfava, ichipa tembiricha yepamusoro yekushanda inoenderera inosvika 90°C. Ethylene Propylene Diene Monomer (EPDM) inowedzera chiyero ichi kusvika 120°C uye inopa kudzivirira kwakanaka kumvura inopisa, utsi, uye alkalis dzakapfava, kunyangwe ichikurumidza kuora kana paine mvura dzepetroleum.

Kune makemikari ane simba kana tembiricha yakakwira, maFluorocarbon elastomers (FKM/Viton) anoshandiswa, zvichisundira muganho wekupisa kusvika pa200°C. Kudzvinyirirwa kwekumanikidzwa kwakakoshawo; nekuti elastomer bellow ipolymer inochinjika, inogona kubhururuka kana kubuda kana yakakwira system pressure. Nekuda kweizvozvo, akawanda elastomer bellow seals asina rutsigiro anoongororwa kuti ashande zvakanaka pakati pe12 ne16 bar (1.2 kusvika 1.6 MPa). Kupfuura miganhu iyi kunoda kuchinjira kune dhizaini yechisimbiso chakaringana kana simbi bellow.

Kusarudzwa, Kuiswa, uye Zvinhu Zvinoshandiswa

Kubudirira kwekuisa chisimbiso che elastomer pasi pe mechanical kunoenderana zvakanyanya nemaitiro ekusarudza akaomarara uye mitemo yakasimba yekuisa. Kunyangwe chisimbiso chakagadzirwa nemazvo chichakundikana nekukurumidza kana parameter ye process fluid ikadarika zvinodiwa nezvinhu, kana kana nzira dzakanakisisa dzemakanika dzikasateererwa panguva yekuunganidza.

Mainjiniya uyematekiniki ekugadzirisainofanira kushandisa nzira yekutsiva chisimbiso senzira inodzorwa zvakanyanya, ichiongorora miganhu yethermodynamic uye ichiona kuti pombi neshaft zvinosangana nehukuru hwakasimba uye kushivirira kwekumusoro.

Maitiro ekuongorora mvura, tembiricha, uye kumanikidzwa

Kuongorora ma process parameters kunoda kuverenga PV (Pressure-Velocity) factor, iyo inomiririra kupisa kwekukweshana kunogadzirwa pazvisimbiso. Kune standard elastomer bellow seal inoshandisa Carbon graphite inopesana neAluminium Oxide (Ceramic) faces, muganho wekushanda unowanzova 10 kusvika 15 MPa·m/s. Kana pombi ichishanda nekumhanya kwakanyanya kana kumanikidzwa kwakakwira kunopfuura muganho uyu wePV, fluid film inopwanyika, zvichikonzera kuoma kwekushanda uye kupisa kwe elastomer nekukurumidza.

Kuongororwa kwemvura kunofanirawo kutsanangura mamiriro enguva pfupi. Mvura isina njodzi pa20°C inogona kukuvadza zvakanyanya elastomer yakasarudzwa pa80°C. Uyezve, mvura inonamira pakutonhorera kana kusangana nemhepo inogona kusimbisa pasi pemvura iri munzvimbo yayo panguva yekudzima kwepombi, ichibvarura polymer kana michina yatangazve. Muzviitiko zvakadaro, kudzora zvakatipoteredza kunogona kudiwa.

Maitiro ekuisa uye nzira dzakajairika dzekutadza

Maitiro ekuisa ndiwo anotungamira zvakananga hupenyu hwechisimbiso.mubato wepombi unofanira kunge usina maburi, mavanga, uye mipendero yakapinza inogona kucheka dhayamita yemukati mepasi pechinhu panguva yekuiswa. Mitemo yeindasitiri inorayira kuti shaft surface finish ive pakati peRa 0.8 kusvika 1.2 µm kuti ivharwe zvakanaka uye kuti torque ipfuure zvakanaka.

Nzira inowanzo kundikana ndeyekubvarura bellow, kazhinji kunokonzerwa nekuzora zvisina kunaka panguva yekuunganidza. Mainjiniya anofanira kushandisa mafuta anoenderana ne elastomer chaiyo; semuenzaniso, kuisa grisi ine petroleum pabellow yeEPDM kuchaita kuti rabha izvimbe, ipfave, uye pakupedzisira ikundikane kana yaita rotational torque. Kushandisa mafuta anotenderwa esilicone kana mvura ine sipo inosungirwa kuve nechokwadi chekuti zvigaro zvebellow zvakanaka pasina kumonyoroka.

Mitemo, miganhu, uye zvinodiwa nemupi

Kuti zvive nechokwadi chekuti zvinochinjika uye zvinoshanda zvakanaka, vatengi vanofanira kusarudza zvisimbiso zvinoenderana nemazinga anozivikanwa, kunyanya EN 12756 (yaimbova DIN 24960). Kutevedzera mitemo iyi kunovimbisa kuti chisimbiso ichi chinokwana mumabhokisi ekuisa pombi asingade machining akagadzirwa kana mapurasitiki egland akasarudzika.

Kukosha kwemupi webasa kwakakoshawo.Vatengi vemaindasitiriVagadziri vezvisimbiso vanofanira kuraira kuti vagadziri vezvisimbiso vave nechitupa cheISO 9001 uye vanogona kupa ruzivo rwezvinhu zve elastomers nemidziyo yekumeso. Vagadziri vemhando yepamusoro vanowanzo chengetedza mwero wezvikanganiso zvekugadzira uri pasi pe0.5%. Kukumbira data re statistical process control (SPC) kuti rionekwe serisingatsvedzeri uye kuti rionekwe zvakanaka kunogona kudzivirira zvakanyanya kubva pakugamuchira zvikamu zvisina kufanira.

Masarudzo Anofanira Kuitwa Nevatengi

Kutenga zvisimbiso zve elastomer pasi pemakanika kunoda kuenzana pakati pemari yekutenga zvinhu zvekutanga uye kuvimbika kwekushanda kwenguva refu. Kunyange zvazvo zvisimbiso izvi zvichionekwa sezvinhu zvinodyiwa, kuzvitora sezvinhu zvisingadhuri zvinogona kukonzera kusagadzikana kwakanyanya kwekugadzirisa uye kuwedzera kwemutengo wekuva muridzi (TCO).

Vatengi vanofanira kuongorora zvinodiwa nemidziyo yavo inotenderera uye voisa mitemo yekutenga iyo inonyanya kukosha paMean Time Between Failures (MTBF) pane kuchengetedza mari shoma mumari yekutanga. Hurongwa hwesarudzo hwakarongeka hunovimbisa kuti zvinodiwa zvechisimbiso zvinoenderana nezvinangwa zvekuvimbika kwemuchina.

Zvinodiwa pakutenga uye mutengo wehupenyu hwese

Mutengo wekutanga wekutenga chisimbiso che elastomer unoenderana zvakanyanya nehuwandu uye magadzirirwo echinhu chacho. Zvisimbiso zveNBR/Carbon/Ceramic zvinotengwa muhuwandu hwakawanda (Minimum Order Quantities zve100 kusvika 500 units) zvinogona kudhura zvishoma semadhora gumi kusvika makumi mashanu payuniti imwe neimwe. Zvisinei, kukwidziridzwa kune zvinhu zvepamusoro zvakaita seSilicon Carbide (SiC) kana Tungsten Carbide (TC) kuti zvisaparare zvichawedzera mutengo wekutanga ne30% kusvika 50%.

Sezvinoratidzwa nemuenzaniso wemitengo yehupenyu hwese, kuwedzera kuri pakati nepakati kwemutengo wekutanga wekutenga zvinhu zvakaoma zvechiso uye ma elastomers akasimba kunoruramiswa zviri nyore nekuwedzera kukuru muMTBF.

Zvinhu Zvinokosha Zvaunofanira Kuziva

• Mhedzisiro yakakosha uye chikonzero cheElastomer Bellow Mechanical Seal
• Magadzirirwo, kutevedzera mitemo, uye kuongororwa kwenjodzi zvinofanirwa kuongororwa usati waita chibvumirano
• Matanho anotevera anoshanda uye mazano anogona kushandiswa nevaverengi ipapo ipapo

Mibvunzo Inowanzo bvunzwa

Chii chinoshandiswa nechisimbiso che elastomer bellow mechanical?

Inovhara michina inotenderera yakaita semapombi e centrifugal, ma mixers, uye ma agitators, kunyanya mumasevhisi ekumanikidzwa akaderera kusvika pakati nepakati uko kunodiwa kudzora kudonha kwemvura uye kugadzirisa kuri nyore.

Chisimbiso che elastomer bellow chakasiyana sei nechisimbiso chekusundidzira?

Inoshandisa elastomer inochinjika iri pakati pemabhii pachinzvimbo cheO-ring yechipiri inotsvedza, iyo inobatsira kudzivirira kupwanyika kwemubato, inoderedza njodzi yekurembera, uye inoita kuti kushanda kwayo kuve nyore muzvinwiwa zvakasviba kana zvinokwenya.

Ndezvipi zvakanakira zvikuru zve elastomer bellow mechanical seals?

Dzinopa dhizaini diki, zvikamu zvishoma zvinofamba-famba, zvinodzivirira kusakara zvakanaka, uye dziviriro iri nani kubva pakubuda kwemvura kunokonzerwa nekunamira kweO-ring pashaft.

Ndeapi maindasitiri anowanzo shandisa zvisimbiso zve elastomer bellow?

Dzinoshandiswa zvakanyanya mukurapa mvura, kugadzirisa makemikari, masisitimu emugungwa, pulp nepepa, mafekitori emagetsi, uye kugadzirisa pombi dzemaindasitiri.

Victor Seals anogona here kupa zvisimbiso zve elastomer zvinotsiva zve pombi dzeOEM?

Ehe. Victor Seals inopa zvinotsiva zve elastomer zvinoenderana neOEM zvemhando dzakadai seGrundfos, Flygt, Alfa Laval, IMO, Lowara, naAllweiler zvekugadzirisa nekugadzirisa.