In thick film hydrodynamic journal bearings, the coefficient of friction

decreases with increase in load

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may increase or decrease with increase in load

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increase with increase in load

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is independent on load

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Solution

The correct option is A decreases with increase in load
$f \propto \frac{Z N}{P}$
where, $Z$ is viscosity, $N$ is speed and $P$ is load.

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Similar questions

A hydrodynamic journal bearing is subjected to 2000 N load at a rotational speed of 2000 rpm. Both bearing bore diameter and length are 40 mm. If radial clerance is 20 μ m and bearing is lubricated with an oil having viscosity 0.03 Pa.s, the Sommerfeld number of the bearing is

(P r = 0.7)

δ

δ_{T}

(δ)

(δ_{t})

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