Izinto ezahlukeneyo ezichaphazela i-bearing friction factor
1. Iipropati zomphezulu
Ngenxa yongcoliseko, unyango lobushushu bekhemikhali, i-electroplating kunye ne-lubricants, njl. umphezulu wesinyithi.), ukwenzela ukuba umaleko womphezulu ube neepropati ezahlukeneyo kwi-substrate.Ukuba ifilimu engaphezulu ingaphakathi kobunzima obuthile, indawo yokudibanisa yokwenene isafafazwa kwizinto ezisisiseko endaweni yefilimu yomhlaba, kwaye amandla e-shear yefilimu yomhlaba angenziwa ngaphantsi kwesiseko sesiseko;kwelinye icala, akukho lula ukwenzeka ngenxa yobukho befilimu engaphezulu.Ukubambelela, ngoko ke amandla okukhuhla kunye ne-friction factor inokunciphisa ngokufanelekileyo.Ubukhulu befilimu engaphezulu bunempembelelo enkulu kwi-friction factor.Ukuba ifilimu yomhlaba incinci kakhulu, ifilimu iyachithwa ngokulula kwaye uqhagamshelwano oluthe ngqo lwe-substrate luyenzeka;ukuba ifilimu yomphezulu ingqingqwa kakhulu, kwelinye icala, indawo yokunxibelelana yokwenyani iyanda ngenxa yefilimu ethambileyo, kwaye kwelinye icala, iincochoyi ezincinci kwimiphezulu mibini zi. abadumileyo.Ingabonwa ukuba ifilim engaphezulu inobukhulu obukhulu obufanele ukufunwa.2. Iimpawu zezinto eziphathekayo I-coefficient ye-friction ye-friction pairs yentsimbi iyahluka kunye neempawu zezinto ezidibeneyo.Ngokuqhelekileyo, intsimbi efanayo okanye iperi yentsimbi edibeneyo kunye ne-solubility enkulu yokubambisana ithande ukunamathela, kwaye i-friction factor yayo inkulu;ngokuchaseneyo, i-friction factor incinci.Izinto zezakhiwo ezahlukeneyo zineempawu ezahlukeneyo zokukhuhlana.Ngokomzekelo, i-graphite inesakhiwo esizinzile se-layer kunye ne-bonding force encinci phakathi kweengqimba, ngoko kulula ukutyibilika, ngoko ke i-friction factor incinci;umzekelo, iperi friction ye-diamond pairing ayilula ukunamathela ngenxa yobunzima bayo obuphezulu kunye nendawo encinci yokudibanisa, kwaye i-friction factor yayo iphezulu.encinci.
3. Impembelelo yokushisa kwendawo ejikelezileyo kwi-friction factor ibangelwa ikakhulu utshintsho kwiipropati zezinto ezingaphezulu.Iimvavanyo zikaBowden et al.bonisa ukuba izinto zokukhuhlana kweentsimbi ezininzi (ezifana ne-molybdenum, tungsten, tungsten, njl.) kunye neekhompawundi zazo, Ixabiso elincinci lenzeka xa ubushushu obuphakathi obujikelezileyo bungama-700 ~ 800℃.Le nto yenzeka ngenxa yokuba ukunyuka kweqondo lokushisa lokuqala kunciphisa amandla okucheba, kwaye ukunyuka kweqondo lokushisa okungaphezulu kubangela ukuba isivuno sehle kakhulu, sibangele ukuba indawo yokudibanisa yokwenene inyuke kakhulu.Nangona kunjalo, kwimeko ye-polymer friction pairs okanye ukucutshungulwa koxinzelelo, i-coefficient ye-friction iya kuba nexabiso eliphezulu kunye nokutshintsha kweqondo lokushisa.
Kunokubonwa koku ngasentla ukuba impembelelo yobushushu kwi-friction factor iyatshintsha, kwaye ubudlelwane phakathi kobushushu kunye ne-friction factor iba nzima kakhulu ngenxa yempembelelo yeemeko ezithile zokusebenza, iipropati eziphathekayo, utshintsho lwefilimu ye-oxide kunye nezinye izinto.
4. Isantya sokuhamba esihambelanayo
Ngokubanzi, isantya sokutyibilika siya kubangela ukufudumeza komhlaba kunye nokunyuka kweqondo lokushisa, ngaloo ndlela utshintshe iipropati zendawo, ngoko ke i-friction factor iya kutshintsha ngokufanelekileyo.Xa isantya sokutyibilika esihambelanayo seendawo ezidityanisiweyo zesibini sokukhuhlana sidlula i-50m / s, ubungakanani obukhulu bobushushu obukhukhulayo buveliswa kwiindawo zoqhagamshelwano.Ngenxa yexesha elifutshane eliqhubekayo loqhagamshelwano lendawo yoqhagamshelwano, isixa esikhulu sobushushu obukhukhulayo obuveliswe ngoko nangoko asinako ukusasazeka ngaphakathi kwi-substrate, ngoko ke ubushushu obukhukhulayo bugxininiswe kumgangatho ongaphezulu, okwenza ubushushu bomphezulu bube phezulu kwaye umaleko otyhidiweyo ubonakale. .Intsimbi etyhidiweyo idlala indima yokuthambisa kwaye yenza ukukhuhlana.Into iyancipha njengoko isantya sinyuka.Ngokomzekelo, xa isantya se-sliding copper si-135m / s, i-friction factor yayo yi-0.055;xa i-350m/s, ithotywe ibe yi-0.035.Nangona kunjalo, i-friction factor yezinye izinto (ezifana negraphite) ayinakuchaphazeleka ngesantya sokutyibilika, kuba iipropathi zomatshini zezinto ezinjalo zinokugcinwa kuluhlu olubanzi lobushushu.Ukukhuhlana komda, kuluhlu lwesantya esisezantsi apho isantya singaphantsi kwe-0.0035m/s, oko kukuthi, ukuguquka ukusuka kwi-static friction ukuya kwi-dynamic friction, njengoko isantya sinyuka, i-coefficient ye-friction yefilimu ye-adsorption iyancipha ngokuthe ngcembe kwaye ithande ukuba ixabiso elingaguqukiyo, kunye ne-coefficient ye-friction yefilim yokusabela Ikwakhula ngokuthe ngcembe kwaye ithande ukuba nexabiso elingaguqukiyo.
5. Umthwalo
Ngokuqhelekileyo, i-coefficient ye-friction yentsimbi yentsimbi iyancipha ngokunyuka komthwalo, kwaye emva koko ijwayele ukuzinza.Le nto inokuchazwa ngethiyori yokubambelela.Xa umthwalo uncinci kakhulu, iindawo ezimbini ezidibeneyo zidibene ne-elastic, kwaye indawo yoqhagamshelwano yangempela ilingana ne-2/3 yamandla omthwalo.Ngokutsho kwe-adhesion theory, i-friction force ilingana nommandla wokudibanisa wangempela, ngoko ke i-friction factor yi-1 yomthwalo./3 amandla alingana ngokungafaniyo;xa umthwalo umkhulu, iindawo ezimbini eziphindwe kabini zikwimeko yokudibanisa i-elastic-plastiki, kwaye indawo yoqhagamshelwano yokwenene ilingana ne-2/3 ukuya ku-1 amandla omthwalo, ngoko ke i-friction factor iyancipha ngokunyuka komthwalo. .ithande ukuzinza;xa umthwalo umkhulu kangangokuba iindawo ezimbini ezidibeneyo zidibene neplastiki, i-friction factor ixhomekeke ngokuzimeleyo kumthwalo.Ubukhulu be-static friction factor ikwanxulumene nobude boqhagamshelwano olusisigxina phakathi kweendawo ezimbini eziphantsi komthwalo.Ngokubanzi, okukhona ubude bexesha loqhagamshelwano olungatshintshiyo, kokukhona inkulu into emileyo yokukhuhlana.Oku kungenxa yesenzo somthwalo, obangela ukuguqulwa kweplastiki kwindawo yoqhagamshelwano.Ngokwandiswa kwexesha loqhagamshelwano lwe-static, indawo yoqhagamshelwano yangempela iya kwanda, kwaye i-micro-peaks ifakwe omnye komnye.obangelwa bunzulu.
6. Uburhabaxa bomphezulu
Kwimeko yoqhagamshelwano lweplastiki, ekubeni impembelelo yobunzima bomphezulu kwindawo yokudibanisa yokwenene incinci, inokuthi ithathelwe ingqalelo ukuba i-friction factor ayichatshazelwa nzima ngoburhabaxa bomhlaba.Ngomnxeba obomileyo odibeneyo kunye ne-elastic okanye i-elastoplastic contact, xa ixabiso le-roughness ye-surface lincinci, umphumo womatshini uncinci, kwaye amandla e-molecular makhulu;kwaye ngokuphambeneyo.Inokubonwa ukuba i-friction factor iya kuba nexabiso elincinci kunye nokutshintsha koburhabaxa bomphezulu
Iziphumo zezi zinto zingasentla kwi- friction factor azikho zodwa, kodwa zihambelana.
Ixesha lokuposa: Aug-24-2022