Kinematic viscosity yog ib qho qhia txog qhov fluidity ntawm cov khoom roj. Qhov loj dua tus nqi, qhov viscosity siab dua. Tus nqi me dua, qhov viscosity qis dua. Tus nqi no yuav txawv ntawm qhov kub thiab txias, qhov kub thiab txias, qhov me me thiab qhov viscosity qis dua. Hloov pauv, qhov kub thiab txias, qhov loj dua tus nqi thiab siab dua qhov viscosity.
Qhov viscosity index txhais li cas? Qhov tseeb, nws sawv cev rau qib ntawm cov roj hloov nrog kub. Qhov siab dua qhov viscosity Performance index, qhov tsawg dua cov roj viscosity cuam tshuam los ntawm qhov kub thiab txias, qhov tsawg dua qhov viscosity yog kub, thiab cov roj tuaj yeem tswj tau qhov viscosity ruaj khov.
Lub viscosity Performance index characterizes lub viscosity-kub yam ntxwv ntawm lubricating roj. Qhov siab dua qhov viscosity Performance index, qhov zoo dua qhov viscosity-kub yam ntxwv ntawm cov roj, thiab qhov zoo ntawm cov roj saum npoo zoo rau qee yam. Nws yog ib qho tseem ceeb tswj Performance index nyob rau hauv cov txheej txheem ntawm lubricating roj manufacturers.