Aasaaska Dufanka
Waa maxay NLGI ee dufanka marka ay timaado dufanka?
Machadka Dufanka Saliida ee Qaranka (NLGI) wuxuu dejiyay kala soocid heereed cayiman oo saliidda lagu saleeyo. Nambarka joogteynta NLGI (oo loo yaqaan “darajada NLGI”) halbeegga cabbirka ad-adagnaanta dufanka loo isticmaalo sifaynta. Way sii weynaataa nambarka NLGI taasoo ka dhigan in dufanku uu ka sii adag yahay.
Joogteynta waa cabbiraadda sifooyinka asaasiga ah ee dufanka ee tilmaamaya adkaanta dufanka, kaas oo lagu hagaajin karo iyada oo la beddelo nuxurka dhumucda.
Lambarka joogteynta NLGI kaligii kuma filna qeexida dufanka looga baahan yahay codsi gaar ah. Had iyo jeer tixraac buug-gacmeedka mulkiilahaaga nooca dufan ee lagu taliyey.
Jadwalka soo socdaa wuxuu muujinayaa kala soocida NLGI wuxuuna isbarbar dhigayaa fasal kasta iyo alaabta guriga ee isku midka ah.
| Darajada NLGI (Machadka Dufanka Saliida Qaranka) Nambarada joogtaynta NLGI | |||
| NLGI | ASTM waxay shaqeysay (60 strokes) | Muuqashada | Analoogga cuntada joogtada ah |
| gelinta heerkul ah 25 ° C | |||
| 000 | 445-475 | dareere | saliidda cuntada |
| 00 | 400-430 | dareere badheed | maraqa tufaax |
| 0 | 355-385 | aad u jilicsan | iniin khardal ah |
| 1 | 310-340 | jilicsan | koollada yaanyada |
| 2 | 265-295 | "caadi" dufan | subagga lawska |
| 3 | 220-250 | adag | gaabinta khudaarta |
| 4 | 175-205 | aad u adag | caano fadhi barafaysan |
| 5 | 130-160 | adag | dhuuban siman |
| 6 | 85-115 | aad u adag | farmaajo cheddar |
NLGI Fasalka 000-NLGI 0 dufan
Codsiga: NLGI Fasalka 000-NLGI 0 waxaa lagula talinayaa cadaadis sare, hawl culus iyo nidaam xiran.
Faa'iidooyinka: Waxqabadka saliidda ee aadka u wanaagsan, bamgareynta wanaagsan, daadinta kulaylka wanaagsan.
Khasaaro: Si fudud u muuqda kala soocida saliidda.
NLGI 1- 2
Caadiyan NIGI 2 waa heerka iyo joogteynta ugu caansan inta badan dufanka, waa dufan caadi ah. Laakiin codsiyada la taaban karo, codsiyo kala duwan ama qalabyo kala duwan ayaa loo baahan doonaa dufan NLGI kala duwan.
Faa'iidooyinka: kala duwan ee codsiyada, xasiloonida colloidal wanaagsan
Joogteynta darajada NLGI ≠ Viscosity
Weydii macmiilka: waxaan raadinayaa hal dufan oo ka dhumuc weyn...
Warshada Lubircant: Ma waxaad rabtaa dufan badan oo "adag" ama dufan ka badan "dhedheg"?
Macmiil: Waa maxay faraqa u dhexeeya labadan?
Marka hore darajooyinka NLGI (Isku-joogta & Gelitaanka) waxaa loogu talagalay oo keliya alaabta dufanka
Viscosity-kuna waa saliidda saliidda ama saliidda saldhigga ah ee alaabta dufanka leh.
Darajooyinka NLGI waxay u kala saaraan dufan jilicsan ama adag, waxay u taagan tahay xaaladda muuqaalka dufanka.
viscosity kala saar viscosity sal sal dufan, Waxay go'aamisaa viscosity dufan, The sare ee viscosity, iyo dufanku waa dheeraad ah dhegdheg.
Caadiyan 2 dufan ayaa laga yaabaa in ay lahaadaan isla darajada NLGI laakiin aad u kala duwan viscosities-saliid, halka laba kale laga yaabaa in ay leeyihiin isku mid ah viscosity sal-saliid laakiin ka duwan NLGI darajooyinka, taasi waa xaalad caadi ah ee alaabta dufan.
Taasi waa sababta aan u fahannay baahida dhabta ah ee macaamiisha.