Question $1$

$[25]$

A full journal bearing has a nominal diameter of $30mm$ and a bearing length of $30mm.$ The bearing supports a load of $2000N,$ and the journal bearing's speed is $1800rpm.$ The radial clearance is $0,025mm.$ If the lubricant supply temperature is $40C$ and the oil to be used is SAE $10.$

Determine:

a$)$ The temperature rise of the lubricant if $T$ is $19C.$

$[14]$

b$)$ The lubricant flow rate.

$[3]$

c$)$ The minimum film thickness.

$[2]$

d$)$ The torque required to overcome friction.

$[3]$

e$)$ The power dissipated in the bearing.

$[3]$

Note: Show all your calculations