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LUBRICANT & LUBRICATION

LUBRICANT & LUBRICATION

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LUBRICANT & LUBRICATION

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  1. LUBRICANT & LUBRICATION

  2. Crude Oil n-Parafin Gasoline Kerosene Fuel Oil Oil Lubricant H.C. Oil Wax Aromatic S & N Contaminant 1000-3000 psi Hydrocracking Catalitic Treatment 430 – 550 C Additives H.C. Lube Oil

  3. Chemical Additives 1. Oxidation Inhibitor (O) 2. Rust Inhibitor (R) 3. Anti Wear & Extreme Pressure (EP) 4. Friction Modifier (W ) 5. Detergent & Dispersant (D) 6. Pour-point Depressant (P) 7. Foam Inhibitor (F) 8. Viscosity Index Improver (VI)

  4. Tabel hal. 25

  5. Synthetic Oil Hydrocarbon Poly Alpha-Olefins (PAOs)

  6. Viscosity U Y F h X Newtonian Fluid t= m dU/dy F/A = m U/h m = (F/A) / (U/h) m = Shear Stress / Shear Rate

  7. m = Absolute Viscosity (Dyne.s/cm2 - Poise) v = Kinematic Viscosity r= Density (grm/cm3) v = m / r (Stoke – St) (cSt – mm2/s) Saybolt Universal Seconds (SUS)

  8. Tabel hal, 28

  9. Viscosity vs Temperature log. log (v + 0.7) = A – B log T T = Temperature v = Kinematic viscosity A, B = Constants – given oil

  10. Vogel Equation b = Viscosity-Temp. Coeff

  11. Viscosity Index

  12. L = Viscosity (40C) dari zero-VI oil H = viscosity (40C) dari 100-VI oil U = vsicosity (40C) dari Unkown-oil

  13. ASTM Y = Viscosity cSt(100 C) unkown oil

  14. Viscosity vs Pressure a = Pressure-viscosity Coeff.

  15. Roelands Equation C = konstanta – unit (196.1 MPa atau 28440 psi) Z = 0.6 = 0.4 – 0.8 synthetic oil