Inhloso yokwelashwa kwe-vulcanization:
Lapho i-vulcanization isetshenziswa njengezinto ezilwa nokungqubuzana emikhiqizweni eyimpuphu yensimbi, ama-bearings afakwe ku-iron afakwe uwoyela yiwo asetshenziswa kakhulu.Ama-bearings afakwe uwoyela we-Sintered (okuqukethwe kwe-graphite okungu-1% -4%) anenqubo elula yokukhiqiza kanye nezindleko eziphansi.Endabeni ye-PV<18-25 kg·m/cm 2·sec, ingathatha indawo yethusi, i-babbitt alloy nezinye izinto zokulwa nokungqubuzana.Kodwa-ke, ngaphansi kwezimo ezinzima zokusebenza, njengejubane eliphezulu lokuslayida endaweni yokungqubuzana nomthwalo omkhulu weyunithi, ukumelana nokugqoka nempilo yezingxenye ze-sintered kuzokwehla ngokushesha.Ukuze kuthuthukiswe ukusebenza okunqanda ukungqubuzana kwezingxenye zokulwa nokungqubuzana kwensimbi, kwehliswe i-coefficient of friction, futhi kukhuliswe izinga lokushisa elisebenzayo ukuze kwandiswe ububanzi bokusebenzisa, ukwelashwa kwe-vulcanization kuyindlela efanele ukukhuthazwa.
Isibabule nama-sulfide amaningi anezinto ezithile zokugcoba.I-Iron sulfide iyilubricant enhle eqinile, ikakhulukazi ngaphansi kwezimo ezomile zokungqubuzana, ukuba khona kwe-iron sulfide kunokumelana okuhle nokubanjwa.
Imikhiqizo eyenziwe ngensimbi ye-powder, isebenzisa izimbotshana zayo ze-capillary ingafakwa ngenani elikhulu lesulfure.Ngemuva kokushisa, i-sulfure nensimbi ebusweni be-pores ingakwazi ukukhiqiza i-iron sulfide, esabalaliswa ngokulinganayo kuwo wonke umkhiqizo futhi idlala ukugcoba okuhle endaweni yokungqubuzana Futhi ingathuthukisa ukusebenza kokusika.Ngemuva kwe-vulcanization, ukungqubuzana nokusika kwemikhiqizo kubushelelezi kakhulu.
Ngemuva kokuthi insimbi enezimbotshana ivuvukele, umsebenzi ogqame kakhulu ukuba nezindawo ezinhle zokukhuhlana okomile.Kuyinto egculisayo yokuzigcoba ngaphansi kwezimo zokusebenza ezingenawo uwoyela (okungukuthi, awekho amafutha noma awekho amafutha avunyelwe), futhi inokumelana okuhle nokubanjwa futhi inciphisa isenzakalo sokuququda kwe-shaft.Ngaphezu kwalokho, izici zokungqubuzana zalesi sihloko zihlukile ezintweni ezijwayelekile zokulwa nokungqubuzana.Ngokuvamile, njengoba ingcindezi ethize ikhula, i-coefficient ye-friction ayishintshi kakhulu.Uma ingcindezi ethile idlula inani elithile, i-coefficient ye-friction ikhula kakhulu.Kodwa-ke, i-coefficient ye-friction ye-iron enezimbobo ezinezimbobo ngemva kokwelashwa kwe-vulcanization iyancipha ngokunyuka kwengcindezi ethile ebangeni elikhulu elithile lokucindezela.Lesi isici esibalulekile sezinto ezilwa nokungqubuzana.
I-sintered iron-based oil-based bearing efakwe ku-oyela ngemva kokuvuvuka ingasebenza kahle ngaphansi kuka-250°C.
Inqubo ye-Vulcanization:
Inqubo yokwelashwa kwe-vulcanization ilula futhi ayidingi imishini ekhethekile.Le nqubo imi kanje: faka isulfure ku-crucible bese uyishisa ukuze inyibilike.Uma izinga lokushisa lilawulwa ku-120-130 ℃, uketshezi lwesibabule kuba ngcono ngalesi sikhathi.Uma izinga lokushisa liphezulu kakhulu, Ayihambisani nokukhulelwa.Umkhiqizo we-sintered okufanele ukhulelwe ufudunyezwe ku-100-150 ° C, bese umkhiqizo ucwiliswa kwisisombululo sesulfure esincibilikisiwe imizuzu engu-3-20, futhi umkhiqizo ongashiswanga ucwiliswe imizuzu engu-25-30.Ngokuya ngobuningi bomkhiqizo, ukushuba kodonga kanye nenani lokucwiliswa elidingekayo ukuze kunqunywe isikhathi sokucwiliswa.Isikhathi sokucwiliswa sokuminyana okuphansi nokuqina kwezindonga ezincane sincane;ngendlela efanayo.Ngemuva kwe-leaching, umkhiqizo ukhishwa, futhi isulfure esele ikhishwa.Okokugcina, faka umkhiqizo ofakwe esithandweni somlilo, uwuvikele nge-hydrogen noma amalahle, futhi uwushise ku-700-720 ° C ngehora le-0.5 kuya ku-1.Ngalesi sikhathi, isibabule esicwilisiwe sihlangana nensimbi ukukhiqiza i-iron sulfide.Ngemikhiqizo enobuningi obungu-6 ukuya ku-6.2 g/cm3, okuqukethwe kwesibabule cishe ku-35 kuya ku-4% (iphesenti lesisindo).Ukushisa nokugazinga kuwukwenza isibabule sicwiliswe ezimbotsheni zengxenye yakha i-iron sulfide.
Umkhiqizo we-sintered ngemva kokuvuthwa ungaphathwa ngokucwiliswa kwamafutha nokuqedwa.
Izibonelo zohlelo lokwelashwa kwe-vulcanization:
1. Imikhono yeshaft ye-flour mill Imikhono yeshaft ifakwe kuzo zombili iziphetho zamaroli amabili, isamba samasethi amane.Ingcindezi ye-roll ingu-280 kg, futhi ijubane liyi-700-1000 rpm (P = 10 kg / cm2, V = 2 m / sec).Isihlahla sokuqala se-tin bronze sagcotshwa nge-oil slinger.Manje isithathelwa indawo yinsimbi enezimbobo ezinezimbotshana ezine-sintered iron density engu-5.8 g/cm3 kanye no-S okuqukethwe kuka-6.8%.Idivayisi yokuqala yokugcoba ingasetshenziswa esikhundleni sedivayisi yokuqala yokugcoba.Vele uwise amaconsi ambalwa kawoyela ngaphambi kokushayela futhi usebenze ngokuqhubekayo amahora angama-40.Izinga lokushisa lomkhono licishe libe ngu-40°C.;Ukugaya i-12,000 kg kafulawa, i-bushing isasebenza ngokujwayelekile.
2. I-roller cone drill iyithuluzi elibalulekile lokugaya amafutha.Kukhona umkhono we-shaft eshelelayo phezulu kuwoyela wokubhola, ongaphansi kwengcindezi enkulu (ingcindezi engu-P=500 kgf/cm2, isivinini V=0.15m/sec.), futhi kukhona ukudlidliza nokushaqeka okunamandla.
Isikhathi sokuthumela: Jul-12-2021