Zinthu zosiyanasiyana zomwe zimakhudza bearing friction factor
1. Katundu wapamwamba
Chifukwa cha kuipitsa, mankhwala kutentha mankhwala, electroplating ndi lubricant, etc., filimu woonda kwambiri pamwamba (monga filimu okusayidi, sulfide filimu, phosphide filimu, chloride film, indium filimu, cadmium filimu, zotayidwa filimu, etc.) pamwamba zitsulo.), kotero kuti pamwamba pake pali zinthu zosiyana ndi gawo lapansi.Ngati filimu ya pamwamba ili mkati mwa makulidwe enaake, malo enieni okhudzana nawo amawazabe pazitsulo zapansi m'malo mwa filimu ya pamwamba, ndipo mphamvu yometa ubweya wa filimuyi imatha kupangidwa pansi kusiyana ndi zinthu zoyambira;kumbali ina, sikophweka kuchitika chifukwa cha kukhalapo kwa filimu yapamwamba.Kumamatira, kotero mphamvu yolimbana ndi mikangano imatha kuchepetsedwa molingana.Kuchuluka kwa filimuyi kumakhudzanso kwambiri friction factor.Ngati filimu yapamwamba imakhala yochepa kwambiri, filimuyo imaphwanyidwa mosavuta ndipo kukhudzana kwachindunji kwa gawo lapansi kumachitika;ngati pamwamba filimu ndi wandiweyani kwambiri, mbali imodzi, kukhudzana kwenikweni malo amawonjezeka chifukwa cha filimu yofewa, ndi mbali ina, nsonga zazing'ono pa malo awiri apawiri ndi The furrowing zotsatira pa filimu pamwamba ndi zambiri. otchuka.Zitha kuwoneka kuti filimuyo ili ndi makulidwe abwino kwambiri oyenera kufunafuna.2. Zinthu zakuthupi Kukangana kwazitsulo zazitsulo zazitsulo zimasiyanasiyana ndi zomwe zimapangidwira.Nthawi zambiri, zitsulo zomwezo kapena zitsulo zolimbana ndi zitsulo zokhala ndi kusungunuka kwakukulu zimakhala zosavuta kumamatira, ndipo kugunda kwake kumakhala kokulirapo;m'malo mwake, friction factor ndi yaying'ono.Zida zamitundu yosiyanasiyana zimakhala ndi mikangano yosiyanasiyana.Mwachitsanzo, graphite ili ndi dongosolo lokhazikika lokhazikika komanso mphamvu yaying'ono yomangirira pakati pa zigawo, kotero zimakhala zosavuta kusuntha, kotero kuti kutsutsana kumakhala kochepa;mwachitsanzo, mikangano iwiri yophatikizira diamondi sikophweka kumamatira chifukwa cha kuuma kwake kwakukulu komanso malo ang'onoang'ono olumikizana nawo, komanso kugundana kwake ndikwapamwamba.zazing'ono.
3. Chikoka cha kutentha kwa sing'anga yozungulira pazitsulo zowonongeka makamaka chifukwa cha kusintha kwa zinthu zakuthupi.Zoyeserera za Bowden et al.kusonyeza kuti mikangano zinthu zitsulo zambiri (monga molybdenum, tungsten, tungsten, etc.) ndi mankhwala awo, Mtengo osachepera kumachitika pamene ozungulira sing'anga kutentha ndi 700 ~ 800 ℃.Chodabwitsa ichi chimachitika chifukwa kukwera kwa kutentha koyambirira kumachepetsa mphamvu ya kukameta ubweya, ndipo kukwera kwina kwa kutentha kumapangitsa kuti zokolola zigwe kwambiri, zomwe zimapangitsa kuti malo enieni okhudzana nawo awonjezere kwambiri.Komabe, pankhani ya ma friction awiriawiri a polima kapena kukakamiza, kugundana kokwanira kumakhala ndi phindu lalikulu ndikusintha kwa kutentha.
Zitha kuwoneka kuchokera pamwambapa kuti chikoka cha kutentha pa friction factor ndi chosinthika, ndipo ubale pakati pa kutentha ndi friction factor umakhala wovuta kwambiri chifukwa cha chikoka cha zochitika zenizeni zogwirira ntchito, katundu wakuthupi, kusintha kwa filimu ya oxide ndi zinthu zina. pa
4. Kuthamanga kwachibale
Kawirikawiri, kuthamanga kothamanga kudzachititsa kutentha kwapamwamba ndi kukwera kwa kutentha, motero kusintha zinthu zapamtunda, kotero kuti chisokonezo chidzasintha molingana.Pamene chibale kutsetsereka liwiro la owirikiza pamwamba pa mikangano awiriwo kuposa 50m/s, kuchuluka kwa frictional kutentha kwaiye pa kukhudzana pamalo.Chifukwa cha nthawi yayifupi yolumikizana yolumikizana ndi malo olumikizirana, kutentha kwakukulu komwe kumapangidwa nthawi yomweyo sikungathe kufalikira mkati mwa gawo lapansi, kotero kutentha kwamphamvu kumakhazikika pamtunda wosanjikiza, kupangitsa kutentha kwapansi kukhala kokwera komanso kusanjikiza kosungunuka kumawonekera. .Chitsulo chosungunula chimagwira ntchito yopaka mafuta ndikupanga kukangana.Chinthucho chimachepa pamene liwiro likuwonjezeka.Mwachitsanzo, pamene kuthamanga kwa mkuwa ndi 135m / s, friction factor ndi 0.055;pamene ili 350m/s, imachepetsedwa kukhala 0.035.Komabe, kugundana kwazinthu zina (monga graphite) sikukhudzidwa kwambiri ndi liwiro lotsetsereka, chifukwa zida zamakina azinthu zotere zimatha kusungidwa pa kutentha kwakukulu.Pakukangana kwa malire, pa liwiro lotsika pomwe liwiro limakhala lotsika kuposa 0.0035m/s, ndiye kuti, kusintha kuchokera ku kukangana kokhazikika kupita ku kukangana kosunthika, liwiro likamawonjezeka, kugundana kwa filimu ya adsorption kumachepa pang'onopang'ono ndipo kumakhala mtengo wokhazikika, komanso kugundana kwa filimuyo imachulukiranso pang'onopang'ono ndipo imakhala yokhazikika.
5. Katundu
Kawirikawiri, kugundana kwachitsulo chachitsulo chogwedeza zitsulo kumachepa ndi kuwonjezeka kwa katundu, ndiyeno kumakhala kokhazikika.Chodabwitsa ichi chikhoza kufotokozedwa ndi chiphunzitso cha adhesion.Pamene katunduyo ndi wochepa kwambiri, malo awiriwa amakhala okhudzana ndi zotanuka, ndipo malo enieni okhudzidwa ndi ofanana ndi mphamvu ya 2/3 ya katunduyo.Malingana ndi chiphunzitso cha adhesion, mphamvu yotsutsana ndi yofanana ndi malo enieni omwe amalumikizana nawo, choncho kutsutsana ndi 1 ya katundu./ 3 mphamvu ndizosiyana;katunduyo ali wamkulu, malo awiriwa ali pamtundu wa zotanuka-pulasitiki, ndipo malo enieni okhudzana ndi ofanana ndi 2/3 mpaka 1 mphamvu ya katunduyo, kotero kuti kukangana kumachepa pang'onopang'ono ndi kuwonjezeka kwa katundu. .imakhala yokhazikika;pamene katunduyo ndi waukulu kwambiri moti mbali ziwiri zapawiri zimagwirizana ndi pulasitiki, chinthu chogwedeza chimakhala chodziimira payekha.Kukula kwa static friction factor kumagwirizananso ndi nthawi ya kukhudzana kwapawiri pakati pa malo awiri omwe ali ndi katundu.Nthawi zambiri, kutalika kwa nthawi yolumikizana ndi malo amodzi, kumapangitsanso kugundana kwakukulu.Izi zimachitika chifukwa cha katundu, zomwe zimayambitsa kusinthika kwa pulasitiki pamalo olumikizirana.Ndi kuwonjezereka kwa nthawi yolumikizana ndi static, malo enieni okhudzana nawo adzawonjezeka, ndipo nsonga zazing'ono zimaphatikizidwa wina ndi mzake.chifukwa chakuya.
6. Pamwamba roughness
Pankhani ya kukhudzana kwa pulasitiki, popeza chikoka chapamwamba chapamwamba pa malo enieni okhudzidwa ndi ochepa, zikhoza kuganiziridwa kuti kugundana sikumakhudzidwa kwambiri ndi kuuma kwapamwamba.Pakukangana kowuma ndi zotanuka kapena elastoplastic kukhudzana, pamene pamwamba roughness mtengo ndi ochepa, mawotchi zotsatira ndi zazing'ono, ndipo mphamvu maselo ndi lalikulu;ndi mosemphanitsa.Zitha kuwoneka kuti friction factor idzakhala ndi mtengo wocheperako ndi kusintha kwa roughness pamwamba
Zotsatira zazifukwa zomwe zili pamwambazi pazomwe zimakangana sizodzipatula, koma zimagwirizana.
Nthawi yotumiza: Aug-24-2022