Chinangwa chekurapa vulcanization:
Kana vulcanization ichishandiswa senge anti-friction zvinhu muupfu metallurgy zvigadzirwa, iron-based oiri-yakamisikidzwa mabearings ndiyo inonyanya kushandiswa.Sintered oiri-impregnated bearings (ine graphite yemukati ye1% -4%) ine nyore kugadzira maitiro uye yakaderera mutengo.Panyaya yePV<18-25 kg·m/cm 2 · sec, inogona kutsiva bronze, babbitt alloy nezvimwe zvinhu zvinorwisa-friction.Nekudaro, pasi pemamiriro ekushanda anorema, akadai senge yakakwira kutsvedza kumhanya pane friction pamusoro uye yakakura unit mutoro, kupfeka kuramba uye hupenyu hwezvikamu zvakasimwa zvichakurumidza kuderera.Kuti uvandudze mashandiro e-anti-friction ye porous iron-based anti-friction parts, kuderedza coefficient of friction, uye kuwedzera tembiricha yekushanda kuti iwedzere kushandiswa kwayo, vulcanization kurapwa inzira yakakodzera kusimudzirwa.
Sarufa nemasarufa mazhinji ane zvimwe zvekuzora.Iron sulfide yakanaka yakasimba lubricant, kunyanya pasi pemamiriro akaoma ekukwesha, kuvapo kweiron sulfide kune kwakanaka kubatwa.
Powder metallurgy iron-based products, uchishandisa capillary pores yayo inogona kuisirwa nesarufa yakawanda.Mushure mekupisa, sarufa nesimbi iri pamusoro pema pores inogona kugadzira iron sulfide, iyo inoparadzirwa zvakaenzana mukati mechigadzirwa uye inotamba mafuta akanaka pane friction surface Uye inogona kuvandudza kushanda kwekucheka.Mushure mevulcanization, kukweshera uye kucheka nzvimbo dzezvigadzirwa zvakanyanya kutsetseka.
Mushure mekunge iyo porous sintered iron yaitwa vulcanized, basa rinonyanya kuzivikanwa nderekuva neakanaka yakaoma friction properties.Icho chinhu chinogutsa chinozvigadzika pasi pemamiriro ekushanda asina mafuta (kureva kuti, hapana mafuta kana mafuta anotenderwa), uye ine kurwisa kwakanaka kwekubata uye inoderedza chiitiko cheshaft gnawing.Mukuwedzera, maitiro ekukwesha echinyorwa ichi akasiyana kubva kune general anti-friction materials.Kazhinji, sezvo iyo chaiyo yekumanikidza inowedzera, iyo friction coefficient haina kuchinja zvakanyanya.Kana iyo chaiyo yekumanikidza inodarika imwe kukosha, iyo friction coefficient inowedzera zvakanyanya.Nekudaro, iyo friction coefficient ye porous sintered iron mushure mekurapwa kwevulcanization inodzikira nekuwedzera kwekudzvanywa kwayo mune yakakura chaiyo yekumanikidza renji.Ichi chinhu chakakosha che anti-friction materials.
Iyo sintered iron-based oil-impregnated bear after vulcanization inogona kushanda zvakanaka pasi pe250°C.
Vulcanization process:
Maitiro ekurapa vulcanization ari nyore uye haadi yakakosha michina.Maitiro acho ndeaya anotevera: isa sarufa mu crucible uye kupisa kuti inyauke.Kana tembiricha ichidzorwa pa120-130 ℃, kuyerera kwesarufa kuri nani panguva ino.Kana tembiricha yakawandisa, Kwete kuitisa impregnation.Chigadzirwa che sintered kuti chigadziriswe chinopisa kusvika 100-150 ° C, uye ipapo chigadzirwa chacho chinonyudzwa mumushonga wesarufa yakanyungudutswa kwemaminitsi 3-20, uye chigadzirwa chisina kupisa chinonyudzwa kwemaminitsi 25-30.Zvichienderana nehuwandu hwechigadzirwa, kukora kwemadziro uye kuwanda kwekunyudzwa kunodiwa kuona nguva yekunyudzwa.Iyo nguva yekunyudzwa yepasi density uye mutete madziro ukobvu ishoma;neimwe nzira.Mushure mekucheka, chigadzirwa chinotorwa kunze, uye sarufa yakasara inodururwa.Pakupedzisira, isa chigadzirwa chakaiswa muchoto, chidzivirire nehydrogen kana marasha, uye kupisa kusvika 700-720 ° C kwe 0.5 kusvika 1 awa.Panguva ino, sarufa yakanyudzwa inopindirana nesimbi kuti ibudise iron sulfide.Kune zvigadzirwa zvine density ye6 kusvika 6.2 g/cm3, iyo sulfur yemukati inenge 35 kusvika 4% (huremu muzana).Kupisa nekugocha ndiko kuita kuti sarufa inyudzwe mumapores echikamu ichiumba iron sulfide.
Iyo sintered chigadzirwa mushure mevulcanization inogona kurapwa nemafuta kunyudzwa uye kupedzisa.
Mienzaniso yekushandisa yekurapa vulcanization:
1. Flour mill shaft sleeves Mishonga ye shaft yakaiswa kumativi ose maviri emapumburu maviri, inokwana seti ina.Kumanikidzwa kwepumburu ndeye 280 kg, uye kumhanya ndeye 700-1000 rpm (P = 10 kg / cm2, V = 2 m / sec).Iyo yekutanga tin bronze bushing yaizorwa neoil slinger.Ikozvino inotsiviwa ne porous sintered iron ine density ye 5.8 g/cm3 uye S yemukati me6.8%.Iyo yekutanga lubrication mudziyo inogona kushandiswa pachinzvimbo cheyekutanga lubrication mudziyo.Ingodonhedza madonhwe mashoma emafuta usati watyaira uye ramba uchishanda kwemaawa makumi mana.Tembiricha yemaoko inosvika 40°C chete.;Kukuya 12,000 kg yehupfu, bushing ichiri kushanda zvakajairika.
2. Iyo roller cone drill chinhu chakakosha chekuchera mafuta.Pane sliding shaft sleeve pamusoro pemafuta ekuchera, ari pasi pekumanikidzwa kukuru (kumanikidza P = 500 kgf / cm2, speed V = 0.15m / sec. ), uye kune kudengenyeka kwakasimba uye kuvhunduka.
Nguva yekutumira: Jul-12-2021