A 5 kN load is carried by a 75 mm long journal bearing having a diameter of 150 mm. Fit tolerance isselected as H8/f7 (use mean clearance). Shaft is rotating at 750 rpm. A sump is cooled to keep the oil at80°C which is fed to the bearing.a) Select the oil type.b) Find the lubricant viscosity and amount of oil that should be supplied.c) Check for design criteria.d) Find the frictional power loss.

For nominal dia 150 mm D=120*180=146.96mmi=.45D3+.001D=.45146.963+.001*146.96=2.52…

Answered: journal bearing

Engineering

Mechanical Engineering

journal bearing

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

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

A 5 kN load is carried by a 75 mm long journal bearing having a diameter of 150 mm. Fit tolerance is
selected as H8/f7 (use mean clearance). Shaft is rotating at 750 rpm. A sump is cooled to keep the oil at
80°C which is fed to the bearing.
a) Select the oil type.
b) Find the lubricant viscosity and amount of oil that should be supplied.
c) Check for design criteria.
d) Find the frictional power loss.

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