To restore stable operating condition in a hydrodynamic journal bearing, when it encounters higher magnitude of loads

oil viscosity index is to be increased

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oil viscosity is to be decreased

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oil viscosity is to be increased

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oil viscosity index is to be decreased

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Solution

The correct option is C oil viscosity is to be increased

For stability $\frac{Z N}{P}$ increases and that $Z$ should be increased and $P$ should be decreased.

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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

F

8000

2 F

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