The following data is given for 360° Hydrodynamic bearing.

Radial Load - 10KN

Journal Speed - 1450rpm

L/D Ratio - 1

Bearing Length - 50mm

Radial Clearance - 20 Microns

Eccentricity - 15 Microns

Sp. Gr. Of Lubricant - 0.86

Sp. Heat of Lubricant – 2.09 kJ kg°C

Calculate

1. Minimum oil film thickness.
2. Coefficient of friction.
3. Power lost in friction.
4. The viscosity of lubricants in cp.
5. The total flow rate of lubricant in lpm
6. Side leakage
7. Avg. temperature, if makeup oil is supplied at 30°C

Given Data

Type of Bearing = 360° Full Journal Hydro-dynamically Lubricated Bearing.

Journal Speed = 1450 rpm

n' = 24.16 rps

Load $W = 10 \times 10^3 N$

L/D=1

L = 50mm

Radial Clearance (Cr) - 20 Microns = $C= 2Cr = 40 \times 10^{-3} mm$

Eccentricity $(e) = 15 \times 10^3 mm$

Spa. Gravity = $ \rho = 0.86 $

Sp. Heat of Lubricant $(C)= 2.09 KJ/kg°C$

Solution