PRINSIP TRIBOLOGI DRY SLIDING FLUID-FILM LUBRICATION -Hydrodynamic Lubrication - Squeeze Film Lubrication - Pressurized Lubrication ELASTODYDRODYNAMICS.

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Presentation transcript:

PRINSIP TRIBOLOGI DRY SLIDING FLUID-FILM LUBRICATION -Hydrodynamic Lubrication - Squeeze Film Lubrication - Pressurized Lubrication ELASTODYDRODYNAMICS LUBRICATION (EHL) - Hard EHL - Soft EHL

DRY SLIDING W U1 U2

W U1 U2 - Graphite - Molibdenum Disulfide - PTFE Plastic - Sulfur or Phosphorus-rich Layer

Fluid-Film Lubrication Hydrodynamic Lubrication W W Journal Bearing Thrust Bearing

LoadLoad on Projected Area LubricantM.Papsi Oil - Steady Radial Load Steady Thrust Load Shock and Dynamic Loads Water Air0.023 Bearing Oil Lubricated - Steady Load - Electric Motor Turbine Rail Road Car Axles Dynamic Load - Automobile Engine Main Bearing Automobile Connecting-rod Bearing Stell Mill Roll Necks Water Air Bearing0.023 Hydrodynamic Load

Squeeze Film Oscillating Load

Pressurized Feed Load

Ball Bearing Contact Point

Elastohydrodynamic Lubrication Distribusi Tekanan Distribusi Film Thickness

Boundary Lubrication Severity N and Viscosity Pressure Insufficient Oil Film Contact Area Deforfation & Temperature Coeff.of Friction

.N/p Coeff. Of Friction, f Full Film Mixed Boundary Lubrication

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