Izici ezahlukahlukene ezithinta i-bearing friction factor
1. Izakhiwo ezingaphezulu
Ngenxa yokungcola, ukwelashwa ngamakhemikhali okushisa, i-electroplating kanye nezinto zokugcoba, njll., ifilimu engaphezulu encane kakhulu (njengefilimu ye-oxide, ifilimu ye-sulfide, ifilimu ye-phosphide, ifilimu ye-chloride, ifilimu ye-indium, ifilimu ye-cadmium, ifilimu ye-aluminium, njll.) indawo yensimbi.), ukuze ungqimba olungaphezulu lube nezakhiwo ezihlukile ku-substrate.Uma ifilimu engaphezulu ingaphakathi kogqinsi oluthile, indawo yokuxhumana yangempela isafafazwa kusisekelo sezinto esikhundleni sefilimu engaphezulu, futhi amandla okugunda efilimu engaphezulu angenziwa aphansi kunalawo ezinto eziyisisekelo;ngakolunye uhlangothi, akulula ukwenzeka ngenxa yokuba khona kwefilimu engaphezulu.Ukunamathela, ngakho amandla okungqubuzana kanye nesici sokungqubuzana kungancishiswa ngokufanele.Ubukhulu befilimu obungaphezulu bubuye bube nomthelela omkhulu kusici sokungqubuzana.Uma ifilimu engaphezulu incane kakhulu, ifilimu igaywa kalula futhi ukuxhumana okuqondile kwe-substrate material kwenzeka;uma ifilimu engaphezulu iwugqinsi kakhulu, ngakolunye uhlangothi, indawo yokuxhumana yangempela iyanda ngenxa yefilimu ethambile, kanti ngakolunye uhlangothi, iziqongo ezincane ezingxenyeni ezimbili ezimbaxambili kukhona. evelele.Kuyabonakala ukuthi ifilimu engaphezulu inobukhulu obufanele ukufunwa.2. Izinto ezibonakalayo I-coefficient yokungqubuzana kwamapheya okushayisana kwensimbi iyahlukahluka nezici zezinto ezibhanqiwe.Ngokuvamile, ipheya efanayo yensimbi noma yensimbi enokuncibilika okukhulu kakhulu ijwayele ukunamathela, futhi isici sayo sokungqubuzana sikhulu;ngokuphambene nalokho, isici sokungqubuzana sincane.Izinto zezakhiwo ezahlukene zinezindawo ezihlukene zokungqubuzana.Isibonelo, i-graphite inesakhiwo esinezingqimba ezinzile kanye namandla amancane okubopha phakathi kwezingqimba, ngakho-ke kulula ukushelela, ngakho-ke isici sokungqubuzana sincane;isibonelo, i-friction pair yokumataniswa kwedayimane akulula ukunamathela ngenxa yokuqina kwayo okuphezulu nendawo encane yokuxhumana yangempela, futhi isici sayo sokungqubuzana siphezulu.encane.
3. Ithonya lokushisa kwendawo ezungezile ku-friction factor ibangelwa ngokuyinhloko ukuguqulwa kwezakhiwo zezinto ezingaphezulu.Ukuhlolwa kuka-Bowden et al.bonisa ukuthi izici zokungqubuzana zezinsimbi eziningi (ezifana ne-molybdenum, i-tungsten, i-tungsten, njll.) nezinhlanganisela zazo, Inani elincane lenzeka lapho izinga lokushisa eliphakathi nendawo liyi-700~800℃.Lesi simo senzeka ngenxa yokuthi ukushisa kokuqala kunciphisa amandla e-shear, futhi ukunyuka kwezinga lokushisa okuqhubekayo kubangela ukuthi iphuzu lokukhiqiza lehle kakhulu, okwenza indawo yokuxhumana yangempela ikhule kakhulu.Kodwa-ke, endabeni yamapheya e-polymer friction noma ukucubungula ingcindezi, i-coefficient ye-friction izoba nenani eliphakeme ngokushintsha kwezinga lokushisa.
Kungabonakala kulokhu okungenhla ukuthi ithonya lokushisa ku-friction factor liyashintsha, futhi ubudlelwano phakathi kwezinga lokushisa kanye ne-friction factor buba nzima kakhulu ngenxa yethonya lezimo ezithile zokusebenza, izakhiwo zezinto ezibonakalayo, izinguquko zefilimu ye-oxide nezinye izici. .
4. Isivinini sokunyakaza esihlobene
Ngokuvamile, ijubane lokuslayida lizobangela ukushisa okungaphezulu kanye nokuphakama kwezinga lokushisa, ngaleyo ndlela kuguqule izakhiwo zendawo, ngakho-ke isici sokungqubuzana sizoshintsha ngokufanele.Uma isivinini esihlobene sokuslayida sezindawo ezibhanqiwe zokubhangqa kokushayisana sidlula u-50m/s, inani elikhulu lokushisa okushayisanayo liyakhiqizwa ezindaweni ezithintana naye.Ngenxa yesikhathi esifushane sokuxhumana esiqhubekayo sephuzu lokuxhumana, inani elikhulu lokushisa okungqubuzanayo okukhiqizwa khona manjalo alikwazi ukusakazeka ngaphakathi kwe-substrate, ngakho-ke ukushisa okungqubuzanayo kugxilwe ongqimbeni olungaphezulu, okwenza izinga lokushisa elingaphezulu libe phezulu futhi kuvele ungqimba oluncibilikisiwe. .Insimbi encibilikisiwe idlala indima yokugcoba futhi yenza ukungqubuzana.Isici siyehla njengoba isivinini sikhula.Isibonelo, uma isivinini sokushelela sethusi singu-135m/s, isici sayo sokungqubuzana singu-0.055;uma ingu-350m/s, yehliswa ibe ngu-0.035.Kodwa-ke, i-friction factor yezinye izinto (njenge-graphite) ayithinteki neze isivinini sokushelela, ngoba izakhiwo zemishini zezinto ezinjalo zingagcinwa phezu kwebanga lokushisa elibanzi.Ngokungqubuzana komngcele, ebangeni lejubane eliphansi lapho isivinini singaphansi kuka-0.0035m/s, okungukuthi, ukuguquka ukusuka ku-static friction ukuya ku-dynamic friction, njengoba isivinini sikhula, i-coefficient yokungqubuzana kwefilimu ye-adsorption iyancipha kancane kancane futhi ijwayele inani elingaguquki, kanye ne-coefficient ye-friction yefilimu yokusabela nayo ikhula kancane kancane futhi ijwayele ukubaluleka okungaguquki.
5. Layisha
Ngokuvamile, i-coefficient ye-friction ye-metal friction pair iyancipha ngokunyuka komthwalo, bese ijwayele ukuzinza.Lesi simo singachazwa nge-adhesion theory.Uma umthwalo umncane kakhulu, izindawo ezimbili ezikabili zixhumene nokunwebeka, futhi indawo yokuxhumana yangempela ilingana namandla angu-2/3 omthwalo.Ngokusho kwe-adhesion theory, amandla okungqubuzana alingana nendawo yokuxhumana yangempela, ngakho-ke isici sokushayisana singu-1 womthwalo./3 amandla alingana ngokuphambene;lapho umthwalo mkhulu, izindawo ezimbili ezikabili zisesimweni sokuthintana ne-elastic-plastic, futhi indawo yokuxhumana yangempela ilingana namandla angu-2/3 kuya ku-1 womthwalo, ngakho-ke i-friction factor iyancipha kancane kancane ngokunyuka komthwalo. .ijwayele ukuzinza;lapho umthwalo mkhulu kangangokuthi izindawo ezimbili ezikabili zixhumene nepulasitiki, isici sokungqubuzana ngokuyisisekelo sizimele ngaphandle komthwalo.Ubukhulu besici sokungqubuzana esimile buhlobene nobude besikhathi sokuthintana okumile phakathi kwezindawo ezimbili ezikabili ngaphansi komthwalo.Ngokuvamile, uma ubude besikhathi sokuxhumana obumile, siba sikhulu isici sokungqubuzana esingashintshi.Lokhu kungenxa yesenzo somthwalo, okubangela ukuguqulwa kwepulasitiki endaweni yokuxhumana.Ngokunwetshwa kwesikhathi sokuxhumana esimile, indawo yokuxhumana yangempela izokhula, futhi ama-micro-peaks ashunyekiwe komunye nomunye.okubangelwa ukujula.
6. Ubukhulu bomhlaba
Endabeni yokuthintana kwepulasitiki, njengoba umthelela wobunzima obungaphezulu endaweni yokuxhumana yangempela mncane, kungacatshangwa ukuthi i-friction factor ayithinteki neze ngobulukhuni bobuso.Ukuze uthole i-friction pair eyomile enokuxhumana okunwebekayo noma kwe-elastoplastic, lapho inani lokuma okungaphezulu lincane, umphumela wemishini mncane, futhi amandla amangqamuzana amakhulu;futhi ngokuphambene.Kungabonwa ukuthi i-friction factor izoba nenani elincane ngokushintsha kokuqina kwendawo
Imiphumela yalezi zici ezingenhla ku- friction factor ayihlukanisiwe, kodwa ihlobene.
Isikhathi sokuthumela: Aug-24-2022