Example 1.11. A 150 mm diameter shaft rotates at 1500 rp.m. in a 200 mm long journal bearing with 150.5 mm internal diameter. The uniform annular space between the shaft and the bearing is filled with oil of dynamic viscosity 0.8 poise. Calculate the power dissipated as heat.

Example 1.11. A 150 mm diameter shaft rotates at 1500 rp.m. in a 200 mm long journal bearing with 150.5 mm internal diameter. The uniform annular space between the shaft and the bearing is filled with oil of dynamic viscosity 0.8 poise. Calculate the power dissipated as heat.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Lubricants

Lubricant can be expressed as the substance that is applied among surfaces to control the wear and tear and improve performance. Lubricants play an essential part in the safety of machinery components like gears, shaft, linkage, cam, clutches, and many others. The quantities which affect the amount of lubricant are temperature, surrounding conditions, speed of the components, and many more.

Question

Example 1.11. A 150 mm diameter shaft rotates at 1500 rp.m. in a 200 mm long journal
bearing with 150.5 mm internal diameter. The uniform annular space between the shaft and the
bearing is filled with oil of dynamic viscosity 0.8 poise. Calculate the power dissipated as heat.
= 4185 W or 4.185 kW (Ans.)

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