pombi ndeimwe yevashandisi vakuru vemakanika zvisimbiso.Sezvinoratidzwa nezita racho, mechanical seals ndeye-contact-type seals, inosiyaniswa kubva kune aerodynamic kana labyrinth isina-contact seals.Mechanical sealsdzinoratidzwawo seyakaenzana mechanical chisimbiso kanaunbalanced mechanical seal.Izvi zvinoreva kuti ndeipi chikamu che, kana chiripo, process pressure inogona kuuya kuseri kwechiso chakamira chisimbiso.Kana chiso chisimbiso chisina kusundirwa pachiso chinotenderera (semupusher-mhando chisimbiso) kana process fluid pakumanikidza kunoda kuiswa chisimbiso hachibvumidzwe kuenda kuseri kwechisimbiso chiso, kumanikidza kwemaitiro kunofuridzira chisimbiso chiso kumashure. uye vhura.Mugadziri wechisimbiso anofanirwa kufunga nezvese mamiriro ekushanda kuti agadzire chisimbiso chine simba rekuvhara rinodiwa asi kwete simba rakawanda zvekuti iyo unit inorodha pachiso chine simba inogadzira kupisa kwakanyanya uye kupfeka.Ichi chiyero chakapfava chinoita kana kutyora kuvimbika kwepombi.
chisimbiso chine simba chinotarisana nekugonesa simba rekuvhura kwete nzira yakajairika ye
kuenzanisa simba rekuvhara, sezvatsanangurwa pamusoro apa.Iyo haibvisi simba rekuvhara rinodiwa asi inopa mugadziri wepombi uye mushandisi imwe knob kuti atendeuke nekubvumira kusaremera kana kuburitsa zviso zvechisimbiso, nekuchengetedza simba rekuvhara rinodiwa, nokudaro kuderedza kupisa uye kupera uku uchiwedzera mamiriro ekushanda.
Dry Gas Seals (DGS), inowanzoshandiswa mumacompressor, inopa simba rekuvhura pazviso zvechisimbiso.Simba iri rinogadzirwa neaerodynamic bearing musimboti, apo migero yekupomba yakanaka inobatsira kukurudzira gasi kubva kune yakakwira-pressure process side of the chisimbiso, kupinda mugomba uye nepamusoro pechiso chechisimbiso sechinhu chisingabatanidzi firimu remvura.
Iyo aerodynamic inobereka kuvhura simba yeyakaoma gasi seal kumeso.Kutenuka kwemutsara kunomiririra kuomarara pane gap.Ziva kuti gap riri mumamicrons.
Chiitiko chimwe chete chinoitika mumafuta e-hydrodynamic anotsigira akawanda makuru e centrifugal compressors uye pombi rotors uye inoonekwa mu rotor dynamic eccentricity plots inoratidzwa neBently Ichi chiitiko chinopa kugadzikana shure kwekumira uye chinhu chinokosha mukubudirira kwe hydrodynamic mafuta bearings uye DGS. .Mechanical seals haana yakanaka yekupomba migero inogona kuwanikwa mune aerodynamic DGS kumeso.Panogona kunge paine nzira yekushandisa kunze yakamanikidzwa gasi inotakura misimboti yekudzikisa uremu hwekuvhara simba kubva kunemechanical chisimbiso chisos.
Qualitative plots of fluid-film bearing parameters maringe nejenari eccentricity ratio.Kuomarara, K, uye kunyorova, D, ishoma kana iro jenari riri pakati pekubereka.Sezvo magazini inoswedera pedyo nekubereka, kuoma uye kunyorova kunowedzera zvakanyanya.
Kunze kudzvanywa aerostatic gasi mabearings anoshandisa sosi yepressurized gasi, nepo mabearings ane simba anoshandisa hukama pakati penzvimbo kugadzira gap pressure.Iyo yekunze yakadzvanywa tekinoroji ine anokwana maviri akakosha mabhenefiti.Chekutanga, gasi rinodzvanywa rinogona kubaiwa zvakananga pakati pezviso zvechisimbiso nenzira inodzorwa pane kukurudzira gasi kupinda mugomba rechisimbiso rine migero yekupomba isina kudzika inoda kufamba.Izvi zvinogonesa kuparadzanisa zviso zvechisimbiso kusati kwatanga kutenderera.Kunyangwe zviso zvikabatana pamwechete, vanozovhurika kuti zero friction inotanga uye inomira kana kudzvanywa kwaiswa jekiseni pakati pavo.Uyezve, kana chisimbiso chiri kupisa, zvinokwanisika nekunze kwekumanikidza kuwedzera kudzvinyirira kune chiso chechisimbiso.Iyo gap ipapo yaizowedzera zvakaenzana nekumanikidzwa, asi kupisa kubva kushear kwaizowira pane cube function yegap.Izvi zvinopa mushandisi simba idzva rekusimudzira kurwisa kugadzirwa kwekupisa.
Pane imwe mukana mucompressors mukuti hapana kuyerera kumeso sezvazviri muDGS.Panzvimbo pezvo, kudzvanywa kwepamusoro kuri pakati pezviso zvechisimbiso, uye kudzvanywa kwekunze kunoyerera mumhepo kana kubuda kune rimwe divi uye kune compressor kubva kune rimwe divi.Izvi zvinowedzera kuvimbika nekuchengetedza nzira kunze kwegomba.Mumapombi izvi zvingasava zvakanakira sezvo zvingave zvisingadikanwi kumanikidza gasi rinomanikidzika kupinda pombi.Compressible magasi mukati memapombi anogona kukonzera cavitation kana mhepo sando nyaya.Zvingave zvinonakidza, zvakadaro, kuve ne-isina-inobata kana friction-isina chisimbiso chepombi pasina kushata kwekuyerera kwegasi mukati mepombi process.Zvingaite here kuve negasi rinomanikidzwa rekunze rine zero kuyerera?
Muripo
Mabhengi ese ekunze anodzvanywa ane imwe mhando yemuripo.Muripo inzira yekurambidza inodzosa kudzvanyirirwa.Iyo yakajairika nzira yekubhadhara ndeyekushandiswa kweorifices, asi kune zvakare groove, nhanho uye porous muripo maitiro.Kubhadhara kunoita kuti mabheya kana zviso zvisimbiso zvimhanye pedyo pasina kubata, nekuti pavanosvika padyo, ndipo panobva pawedzera kudzvanywa kwegasi pakati pawo, zvichidzinga zviso zvakaparadzana.
Semuenzaniso, pasi pegomba rakatsetseka rakabhadhara gasi rinotakura (Mufananidzo 3), avhareji
kudzvinyirirwa mugomba kuchaenzana mutoro wose paberero rakakamurwa nenzvimbo yechiso, iyi unit loading.Kana kunobva gasi uku kuri 60 pounds per square inch (psi) uye chiso chine 10 square inch of area uye pane 300 mapaundi emutoro, pachava neavhareji ye 30 psi mugomba rekubereka.Kazhinji, gaka racho rinoita kunge 0.0003 inches, uye nekuti gaka iri diki, kuyerera kwaizongoita 0.2 yakajairwa cubic tsoka paminiti (scfm).Nekuti pane chinodzivirirwa pasati pasvika gaka rakabata kudzvanya kumashure, kana mutoro ukawedzera kusvika mazana mana emapaundi gomba rekubereka rakaderedzwa kusvika panosvika 0.0002 inches, kudzora kuyerera kuburikidza nemukaha unodzika pasi 0.1 scfm.Uku kuwedzera kwechigadziro chechipiri kunopa iyo orifice restrictor yakakwana kuyerera kuti ibvumire avhareji yekumanikidza mugomba kuti iwedzere kusvika 40 psi uye kutsigira yakawedzera mutoro.
Uku ndiko kuchekwa padivi kuona kweyakajairika orifice mhepo inotakura inowanikwa mumuchina wekuyeresa (CMM).Kana iyo pneumatic system ichizoonekwa se "yakabhadharwa kubereka" inofanirwa kuve neinodzivirirwa kumusoro kweiyo inotakura gap restriction.
Orifice vs. Porous Muripo
Orifice compensation ndiyo inonyanyo shandiswa nzira yekuripa. Mumiriro wakajairika unogona kunge uine dhayamita yegomba inosvika .010 inches, asi sezvo iri kudya mashoma masikweya mainji enzvimbo, iri kupa maodha akati wandei ehukuru kupfuura iwo, saka kumhanya kwacho. gasi rinogona kuva rakakwirira.Kazhinji, maorifice anochekwa chaizvo kubva kumarubhi kana kuti sapphire kudzivirira kukukurwa kweiyo orifice saizi uye saka shanduko mukuita kwekubereka.Imwe nyaya ndeyokuti pamagapu ari pasi pe 0.0002 inches, nzvimbo yakapoteredza orifice inotanga kuvhunga kuyerera kune imwe nzvimbo yechiso, panguva iyo kuparara kwefirimu yegesi kunoitika. orifice uye chero ma grooves aripo kuti atange kusimudza.Ichi ndicho chimwe chezvikonzero zvikuru zvekunze zvakamanikidzwa fani hazvionekwe muzvirongwa zvechisimbiso.
Izvi hazvisizvo kune porous yakabhadharwa kubereka, panzvimbo iyo kuoma kunoenderera mberi
kuwedzera sezvo mutoro unowedzera uye gaka rakaderedzwa, sezvakangoita neDGS (Mufananidzo 1) uye
hydrodynamic mafuta bearings.Panyaya yekunze yakadzvanywa porous mabearings, kubereka kunenge kuri mukuenzanisa simba muoti kana kupinza dzvinyiriro nguva nharaunda yakaenzana mutoro wose pakutakura.Iyi inonakidza tribological kesi sezvo paine zero kusimudza kana mhepo gap.Pachave ne zero kuyerera, asi iyo hydrostatic simba rekumanikidza kwemhepo kutarisana nekaunda pasi pechiso chebereki richiri kusaremesa mutoro wakazara uye zvinoguma nepedyo zero coefficient yekukwesha-kunyangwe zviso zvichiri kusangana.
Semuyenzaniso, kana graphite seal face ine nzvimbo ine 10 square inches uye 1,000 pounds yekuvhara simba uye graphite ine coefficient of friction ye 0.1, zvinoda 100 pounds yesimba kuti itange kufamba.Asi nekunze kwekumanikidza sosi ye100 psi inotakurwa kuburikidza neiyo porous graphite kumeso kwayo, panogona kunge paine zero simba rinodiwa kuti utange kufamba.Izvi zvakadaro zvisinei nekuti kuchine 1,000 mapaundi ekuvhara simba kusvina zviso zviviri pamwe chete uye kuti zviso zviri mukubata kwenyama.
Kirasi yezvakajeka zvinotakura zvinhu zvakadai se: graphite, carbons uye ceramics sealumina nesilicon-carbides iyo inozivikanwa kune turbo industries uye yakasikwa porous saka inogona kushandiswa sekunze yakamanikidzwa mabearings ayo asingabatanidzi emvura mafirimu mabearings.Pane basa rakasanganiswa uko kudzvanywa kwekunze kunoshandiswa kudzikisa uremu hwekubata kana simba rekuvhara rechisimbiso kubva kune tribology iri kuitika mukubata chisimbiso zviso.Izvi zvinobvumira mushandisi wepombi chimwe chinhu kuti agadzirise kunze kwepombi kuti agadzirise dambudziko rekushandisa uye kukurumidza kumhanya mashandiro paunenge uchishandisa mechanical seals.
Iyi nheyo inoshandawo kune mabhurashi, ma commutators, exciters, kana chero anobata conductor anogona kushandiswa kutora data kana magetsi emagetsi pa kana kudzima zvinhu zvinotenderera.Sezvo rotors inotenderera nekukurumidza uye ichipera ichiwedzera, zvinogona kuve zvakaoma kuchengetedza zvishandiso izvi zvakasangana neshaft, uye zvinowanzodiwa kuwedzera kudzvanywa kwechirimo kunovabata pakatarisana neshaft.Zvinosuruvarisa, kunyanya munyaya yekushanda kwepamusoro-soro, kuwedzera uku kwesimba rekubatana kunoguma nekupisa kwakanyanya uye kupfeka.Iwoyo musimboti wakasanganiswa wakashandiswa kumakanika chisimbiso zviso zvinotsanangurwa pamusoro apa zvinogona zvakare kushandiswa pano, uko kubatwa kwemuviri kunodiwa kufambiswa kwemagetsi pakati pezvikamu zvakamira uye zvinotenderera.Iyo yekumanikidza yekunze inogona kushandiswa sekumanikidza kubva kune hydraulic cylinder kuderedza kukweshera pane inoshanduka interface uchiri kuwedzera simba remuchirimo kana kuvhara simba rinodiwa kuchengetedza bhurashi kana chisimbiso chiso chakabatana neinotenderera shaft.
Nguva yekutumira: Oct-21-2023