Injongo yonyango lwe-vulcanization:
Xa i-vulcanization isetyenziswa njengezinto ezichasene ne-friction kwimveliso ye-metallurgy yomgubo, iibheringi ezifakwe kwi-iron-based oyile zezona zisetyenziswa kakhulu.Iibheringi ze-oyile ezifakwe kwi-Sintered (ezinomxholo wegraphite we-1% -4%) zinenkqubo yokuvelisa elula kunye neendleko eziphantsi.Kwimeko ye-PV<18-25 kg·m/cm 2 · sec, inokutshintsha i-bronze, i-babbitt alloy kunye nezinye izinto ezichasene ne-friction.Nangona kunjalo, phantsi kweemeko ezinzima zokusebenza, ezifana nesantya esiphezulu se-sliding kwi-friction surface kunye nomthwalo omkhulu weyunithi, ukuxhatshazwa kokugqoka kunye nobomi beendawo ezidibeneyo ziya kuncipha ngokukhawuleza.Ukuze kuphuculwe ukusebenza kwe-anti-friction ye-porous iron-based anti-friction parts, ukunciphisa i-coefficient of friction, kunye nokwandisa ubushushu bokusebenza ukwandisa uluhlu lwayo lokusetyenziswa, unyango lwe-vulcanization yindlela efanelekileyo yokukhuthazwa.
Isulfure kunye neesulfide ezininzi zineempawu ezithile zokuthambisa.I-Iron sulfide sisithambiso esilungileyo esiqinileyo, ngakumbi phantsi kweemeko zokhuhlane ezomileyo, ubukho be-iron sulfide bunokuxhathisa okulungileyo kokuxhuzula.
Iimveliso ezisekelwe kwi-iron ye-powder, zisebenzisa i-capillary pores zinokuthi zifakwe kwisixa esikhulu sesulfure.Emva kokufudumeza, i-sulfure kunye nentsimbi ebusweni be-pores inokuvelisa i-sulfide yensimbi, esasazwa ngokulinganayo kuyo yonke imveliso kwaye idlala i-lubrication efanelekileyo kwi-friction surface Kwaye inokuphucula ukusebenza kokusika.Emva kwe-vulcanization, ukungqubuzana kunye nokusika iindawo zeemveliso zilula kakhulu.
Emva kokuba i-iron ene-porous sintered ifakwe i-vulcanized, owona msebenzi ubalaseleyo kukuba neepropati ezilungileyo zokukhuhlana.Yinto eyanelisayo yokuzithambisa phantsi kweemeko zokusebenza ezingenawo ioli (oko kukuthi, akukho mafutha okanye akukho oyile evunyelweyo), kwaye inokumelana nokubanjwa kakuhle kunye nokunciphisa into eyenziwa yi-shaft gnawing.Ukongezelela, iimpawu zokuxhatshazwa kwesi sixhobo zihluke kwizinto eziqhelekileyo ezichasayo.Ngokuqhelekileyo, njengoko uxinzelelo oluthile lukhula, i-coefficient ye-friction ayitshintshi kakhulu.Xa uxinzelelo oluthile ludlula ixabiso elithile, i-coefficient ye-friction iyanda ngokukhawuleza.Nangona kunjalo, i-coefficient ye-friction ye-porous sintered iron emva kokunyangwa kwe-vulcanization iyancipha ngokunyuka koxinzelelo lwayo oluthile kuluhlu olukhulu loxinzelelo.Olu luphawu oluxabisekileyo lwezinto ezichasene ne-friction.
I-oyile efakwe kwintsimbi esekwe kwintsimbi emva kokuba ivulcanization ingasebenza kakuhle ngaphantsi kwe 250°C.
Inkqubo yeVulcanization:
Inkqubo yonyango lwe-vulcanization ilula kwaye ayifuni izixhobo ezizodwa.Inkqubo yile ilandelayo: faka isulfure kwi-crucible kwaye uyitshise ukuze inyibilike.Xa ubushushu bulawulwa kwi-120-130 ℃, ubumanzi besulfure bungcono ngeli xesha.Ukuba iqondo lobushushu liphezulu kakhulu, Ayilungelanga ukukhulelwa.Imveliso ye-sintered ukuba ifakwe i-preheated ukuya kwi-100-150 ° C, kwaye emva koko imveliso ifakwe kwisisombululo sesulfure esinyibilikisiweyo se-3-20 imizuzu, kwaye imveliso engabonakaliyo ifakwe kwi-25-30 imizuzu.Ngokuxhomekeke kubuninzi bemveliso, ubukhulu bodonga kunye nomlinganiselo wokucwiliswa ofunekayo ukucacisa ixesha lokucwiliswa.Ixesha lokuntywiliselwa koxinzelelo oluphantsi kunye nobukhulu bodonga olubhityileyo luncinci;ngokubhidana.Emva kwe-leaching, imveliso ikhutshwe, kwaye i-sulfure eseleyo ikhutshwe.Ekugqibeleni, faka imveliso edibeneyo kwisithando somlilo, yikhusele nge-hydrogen okanye i-charcoal, kwaye uyitshise kwi-700-720 ° C kwi-0.5 ukuya kwi-1 iyure.Ngeli xesha, isulfure entywilisiweyo isabela ngentsimbi ukuvelisa i-iron sulfide.Kwiimveliso ezinobunzima be-6 ukuya kwi-6.2 g / cm3, umxholo wesulfure umalunga ne-35 ukuya kwi-4% (ipesenti yobunzima).Ukufudumeza kunye nokutshisa kukwenza isulfure ifakwe kwi-pores yenxalenye ye-iron sulfide.
Imveliso ye-sintered emva kwe-vulcanization ingaphathwa ngokucwiliswa kweoli kunye nokugqiba.
Imizekelo yesicelo sonyango lwe-vulcanization:
1. Imikhono ye-shaft yomgubo we-flour Imikhono ye-shaft ifakwe kuzo zombini iziphelo zemiqulu emibini, iyonke iiseti ezine.Uxinzelelo lwe-roll yi-280 kg, kwaye isantya si-700-1000 rpm (P = 10 kg / cm2, V = 2 m / sec).Isihlahla sobhedu senkcenkce sokuqala sathanjiswa ngesilingi se-oyile.Ngoku ithathelwa indawo yintsimbi ene-porous sintered kunye noxinano lwe-5.8 g / cm3 kunye ne-S umxholo we-6.8%.Isixhobo sokuqala sokuthambisa sinokusetyenziswa endaweni yesixhobo sokuqala sokuthambisa.Beka nje amathontsi ambalwa eoli ngaphambi kokuba uqhube kwaye usebenze ngokuqhubekayo iiyure ezingama-40.Ubushushu bomkhono bumalunga nama-40°C kuphela.;Ukugaya i-12,000 kg yomgubo, i-bushing isasebenza ngokuqhelekileyo.
2. I-roller cone drill sisixhobo esibalulekileyo sokugaya ioli.Kukho umkhono we-sliding shaft phezu kweoli ye-drill, ephantsi koxinzelelo olukhulu (uxinzelelo P = 500 kgf / cm2, isivinini V = 0.15m / sec. ), kwaye kukho ukungcangcazela okunamandla kunye nokuphazamiseka.
Ixesha lokuposa: Jul-12-2021