Mafuta Ofunika Kwambiri
Kodi NLGI yamafuta ndi chiyani ikafika pamafuta?
National Lubricating Grease Institute (NLGI) yakhazikitsa gulu lodziwika bwino lamafuta opaka mafuta. Nambala yofananira ya NLGI (yomwe imadziwika kuti "NLGI grade") yoyezera kulimba kwamafuta omwe amagwiritsidwa ntchito popaka mafuta. Kukulirapo kwa nambala ya NLGI kutanthauza kuti mafuta ndi olimba kwambiri.
Consistency ndi muyeso wamafuta ofunikira omwe akuwonetsa kuuma kwamafuta, komwe kumatha kusinthidwa posintha makulidwe amafuta.
Nambala yofanana ya NLGI yokha siyokwanira kufotokoza mafuta ofunikira ndi ntchito inayake. Nthawi zonse tchulani bukhu la eni anu la mtundu wovomerezeka wamafuta.
Gome lotsatirali likuwonetsa gulu la NLGI ndikufanizira giredi iliyonse ndi zinthu zapakhomo zofanana.
| NLGI giredi (National Lubricating Grease Institute) manambala osasinthika a NLGI | |||
| NLGI | ASTM inagwira ntchito (60 sitiroko) | Maonekedwe | Kusasinthasintha chakudya analogi |
| kutentha kwa 25 ° C | |||
| 000 | 445-475 | madzimadzi | mafuta ophikira |
| 00 | 400-430 | theka lamadzi | apulo msuzi |
| 0 | 355-385 | zofewa kwambiri | mpiru wofiirira |
| 1 | 310-340 | zofewa | tomato phala |
| 2 | 265-295 | "normal" mafuta | peanut butter |
| 3 | 220-250 | olimba | kufupikitsa masamba |
| 4 | 175-205 | olimba kwambiri | yogurt yozizira |
| 5 | 130-160 | zolimba | yosalala pâté |
| 6 | 85-115 | zovuta kwambiri | cheddar tchizi |
NLGI Grade 000-NLGI 0 mafuta
Ntchito :NLGI Grade 000-NLGI 0 amalimbikitsidwa kuti azithamanga kwambiri, olemetsa komanso otsekedwa.
Ubwino: Kuchita bwino kwa lubricity, pumpability wabwino, kutentha kwabwinoko.
Zoipa: Zosavuta kuwoneka kulekanitsa mafuta.
NLGI 1- 2
Nthawi zambiri NIGI 2 ndiye muyezo komanso kusasinthasintha kodziwika kwambiri mumafuta ambiri, ndimafuta wamba. Koma pakugwiritsa ntchito, kugwiritsa ntchito kosiyana kapena zida zosiyanasiyana kumafunika mosiyanasiyana Ndi Grease.
Ubwino: Ntchito zambiri, kukhazikika kwabwino kwa colloidal
Kusagwirizana kwa NLGI kalasi ≠Viscosity
Makasitomala amafunsa : Ndikuyang'ana mafuta okhuthala ...
Fakitale yamafuta: Kodi mukufuna mafuta "olimba" kapena "mafuta" ochulukirapo?
Makasitomala: Kodi pali kusiyana kotani pakati pa awiriwa?
Choyamba Nlgi Grades (Consistency &Penetration) ndi yamafuta okha
Ndipo viscosity ndi yamafuta opaka mafuta kapena mafuta oyambira amafuta amafuta.
Magulu a NLGI amagawa mafuta ofewa kapena olimba, amayimira mawonekedwe amafuta.
mamasukidwe akayendedwe amagawika mafuta m'munsi kukhuthala kwa mafuta, Kumatsimikizira kukhuthala kwa mafuta, Kuchuluka kwa mamasukidwe akayendedwe, ndipo mafuta amakhala omata kwambiri.
Nthawi zambiri mafuta a 2 amatha kukhala ndi giredi yofanana ya NLGI koma ma viscosity amafuta oyambira osiyana kwambiri, pomwe ena awiri amatha kukhala ndi kukhuthala kwamafuta komweko koma magiredi osagwirizana a NLGI, zomwe ndizochitika muzinthu zamafuta.
Ichi ndichifukwa chake tidayenera kumvetsetsa zomwe kasitomala amafuna.