Zvinhu zvakasiyana-siyana zvinokanganisa kubearing friction factor
1. Nzvimbo dzepamusoro
Nekuda kwekusvibiswa, makemikari kupisa kurapwa, electroplating uye mafuta ekuzora, nezvimwewo, firimu rakatetepa kwazvo (senge oxide firimu, sulfide firimu, phosphide firimu, chloride firimu, indium firimu, cadmium firimu, aluminium firimu, nezvimwewo) pamusoro pesimbi.), kuitira kuti nzvimbo yepamusoro ine zvinhu zvakasiyana kubva kune substrate.Kana iyo firimu yepamusoro iri mukati mehumwe hupamhi, iyo chaiyo yekusangana ichiri kusaswa pahwaro zvinhu panzvimbo yefirimu yepamusoro, uye simba rekuveura remufirimu wepamusoro rinogona kuitwa rakaderera pane iro rekutanga zvinhu;kune rumwe rutivi, hazvisi nyore kuitika nekuda kwekuvapo kwefirimu yepamusoro.Adhesion, saka iyo friction force uye friction factor inogona kuderedzwa zvinoenderana.Ukobvu hwefirimu hwepamusoro hunewo simba guru pane friction factor.Kana iyo firimu yepamusoro yakanyanya kuonda, iyo firimu inopwanyika nyore uye kutarisana kwakananga kweiyo substrate zvinhu kunoitika;kana firimu repamusoro rakanyanya kukora, kune rumwe rutivi, iyo chaiyo yekuonana nzvimbo inowedzera nekuda kweiyo firimu nyoro, uye kune rumwe rutivi, madiki-peaks pamativi maviri maviri ari. prominent.Zvinogona kuoneka kuti iyo firimu repamusoro rine optimum ukobvu hwakakodzera kutsvaga.2. Material properties The friction coefficient of metal friction pairs inosiyana nemhando yezvinhu zvakabatanidzwa.Kazhinji kutaura, simbi imwechete kana simbi inokweshana ine yakakura kunyungudika inonamira, uye friction yayo yakakura;pane zvinopesana, iyo friction factor idiki.Zvishandiso zvezvimiro zvakasiyana zvine maitiro akasiyana ekukweshana.Semuenzaniso, graphite ine yakagadzikana yakaturikidzana chimiro uye diki yekubatanidza simba pakati pematanho, saka zviri nyore kutsvedza, saka iyo friction factor idiki;semuenzaniso, friction pair ye diamond pairing haisi nyore kunamatira nekuda kwekuoma kwayo kwakakwirira uye diki chaiyo yekubata nzvimbo, uye friction factor yayo zvakare yakakwirira.zvidiki.
3. Mhedzisiro yekushisa kwepakati yakapoteredza pane friction factor inonyanya kukonzerwa nekuchinja kwezvinhu zvezvinhu zvepasi.Izvo zviedzo zveBowden et al.ratidza kuti friction factor yesimbi zhinji (senge molybdenum, tungsten, tungsten, etc.) nemakomponi avo, Iko kukosha kwepasi kunoitika kana tembiricha yepakati yakatenderedza iri 700 ~ 800 ℃.Chiitiko ichi chinoitika nekuti kupisa kwekutanga kukwira kunoderedza simba rekugera, uye kuwedzera tembiricha kukwira kunoita kuti goho ridonhe zvakanyanya, zvichiita kuti nzvimbo chaiyo yekusangana iwedzere zvakanyanya.Nekudaro, kana iri nyaya yepolymer friction pairs kana pressure process, iyo friction coefficient ichave yakakosha kukosha nekuchinja kwekushisa.
Zvinogona kuoneka kubva pane zviri pamusoro kuti pesvedzero yetembiricha pane friction factor inoshanduka, uye hukama pakati petembiricha uye friction factor inova yakaoma kwazvo nekuda kwesimba remamiriro ekushanda chaiwo, zvinhu zvemukati, oxide film shanduko nezvimwe zvinhu. .
4. Relative movement speed
Kazhinji, iyo inotsvedza inomhanyisa inokonzeresa kupisa kwepamusoro uye kukwira kwekushisa, nekudaro kushandura zvimiro zvepasi, saka iyo friction factor ichachinja zvinoenderana.Kana kutsvedza kwehukama kwepairi peya peya yekukwesha inodarika 50m/s, huwandu hukuru hwekupisa hunogadzirwa hunogadzirwa panzvimbo yekusangana.Nekuda kweiyo ipfupi inoenderera yekuonana nguva yenzvimbo yekusangana, huwandu hukuru hwekupisa hunogadzirwa nekukasira haugone kupararira mukati meiyo substrate, saka kupisa kunopokana kunonangana nepamusoro pedenga, zvichiita kuti tembiricha yepasi ikwire uye yakanyungudutswa inoonekwa. .Simbi yakanyungudutswa inoita basa rekuzora uye inoita kukwesha.Chinhu chinodzikira sezvo kukurumidza kunowedzera.Semuenzaniso, kana kutsvedza kwemhangura kuri 135m/s, friction factor yayo i 0.055;kana iri 350m/s, inodzikiswa kusvika pa0.035.Nekudaro, iyo friction factor yezvimwe zvinhu (senge graphite) haina kukanganiswa nekumhanya kwekutsvedza, nekuti michina yemhando yezvinhu zvakadaro inogona kuchengetedzwa pamusoro pehupamhi hwekushisa.Pakukwesha kwemuganhu, munzvimbo yakaderera yekumhanya uko kumhanya kwakadzikira kupfuura 0.0035m/s, ndiko kuti, kushandura kubva kune static friction kuenda kune dynamic friction, sezvo kukurumidza kunowedzera, friction coefficient ye adsorption firimu inoderera zvishoma nezvishoma uye inoita kukosha kwekugara, uye friction coefficient of the reaction film Iyo inowedzerawo zvishoma nezvishoma uye inoenda kune inogara yakakosha.
5. Mutoro
Muzhinji, iyo friction coefficient yesimbi friction pair inoderera nekuwedzera kwemutoro, uye zvino inowanzove yakagadzikana.Ichi chiitiko chinogona kutsanangurwa neiyo adhesion theory.Kana mutoro wacho uri muduku zvikuru, maviri maviri maviri ari mu-elastic contact, uye nzvimbo chaiyo yekubatana inofananidzwa ne 2/3 simba remutoro.Zvinoenderana neiyo adhesion theory, iyo friction force inoenderana nenzvimbo chaiyo yekusangana, saka iyo friction factor ndeye 1 yemutoro./3 simba rinopesana nekuenzanisa;kana mutoro wacho wakakura, nzvimbo mbiri mbiri dziri mu-elastic-plastic contact state, uye nzvimbo chaiyo yekubatana inofananidzwa ne 2/3 kusvika ku1 simba remutoro, saka friction factor inoderera zvishoma nezvishoma nekuwedzera kwemutoro. .inowanzova yakagadzikana;kana mutoro wacho wakakura zvekuti nzvimbo mbiri mbiri dziri mupurasitiki kubata, iyo friction factor inongozvimiririra pamutoro.Hukuru hweiyo static friction factor inoenderanawo nenguva yekusangana kwakamira pakati pemaviri maviri ari pasi pemutoro.Kazhinji, iyo yakareba iyo static yekubata nguva, inokura iyo static friction factor.Izvi zvinokonzerwa nekuita kwemutoro, izvo zvinokonzeresa deformation yepurasitiki panzvimbo yekusangana.Nekuwedzerwa kweiyo static yekubata nguva, iyo chaiyo yekuonana nzvimbo ichawedzera, uye madiki-peaks akaiswa mukati meumwe neumwe.zvichikonzerwa nekudzika.
6. Kushata kwepamusoro
Panyaya yekubatana kwepurasitiki, sezvo pesvedzero yehushasha hwepamusoro pane chaiyo yekubata nzvimbo idiki, inogona kutariswa kuti iyo friction factor haina kukanganiswa nekushata kwepamusoro.Kune yakaoma friction pair ine elastic kana elastoplastic kusangana, kana iyo yepamusoro roughness kukosha idiki, iyo mechanical effect idiki, uye simba rema molecular rakakura;uye neimwe nzira.Zvinogona kuoneka kuti iyo friction factor ichave neiyo shoma kukosha nekuchinja kwekuoma kwepasi
Mhedzisiro yezvikonzero zviri pamusoro pane friction factor haina kuparadzaniswa, asi yakabatana.
Nguva yekutumira: Aug-24-2022