B/ A journal/shaft of 60 mm diameter rotates at 3200 rpm. The journal is supported by a shorthydrodynamic bearing of length L = D/3. The distance between the center of bearing and the center ofshaft is 0.018 mm and the ratio of journal radius to the clearance is (). The radial load on thebearing is 9.3 kN. The lubricant is SAE 30, and the operating temperature of the lubricant in thebearing is 80°C. Calculate: (i) the minimum and maximum lubricant film thickness, (ii) the maximumlubricant pressure at bearing, and (iii) the friction power losses.

The purpose of lubricants is to reduce friction between moving surfaces, thereby enhancing…

Answered: B/ A journal/shaft of 60 mm diameter…

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