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Solved: A full journal bearing has a journal diameter of
Chapter 12, Problem 12-1(choose chapter or problem)
A full journal bearing has a journal diameter of 25 mm, with a unilateral tolerance of 20.03 mm. The bushing bore has a diameter of 25.03 mm and a unilateral tolerance of 0.04 mm. The l/d ratio is 1/2. The load is 1.2 kN and the journal runs at 1100 rev/min. If the average viscosity is \(55 mPa \cdot s\), find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Questions & Answers
QUESTION:
A full journal bearing has a journal diameter of 25 mm, with a unilateral tolerance of 20.03 mm. The bushing bore has a diameter of 25.03 mm and a unilateral tolerance of 0.04 mm. The l/d ratio is 1/2. The load is 1.2 kN and the journal runs at 1100 rev/min. If the average viscosity is \(55 mPa \cdot s\), find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
ANSWER:Step 1 of 6
We have to find the minimum film thickness, power loss and side flow for the minimum clearance assembly.
Given data:
Journal Diameter, \(d_{\max }=25 \mathrm{~mm}\)
Unilateral tolerance, \(-0.03 \mathrm{~mm}\)
Bushing bore diameter, \(b_{\text {min }}=25.03 \mathrm{~mm}\)
Unilateral tolerance for bushing bore, \(0.04 \mathrm{~mm}\)
\(l / d=1 / 2\)
Average viscosity, \(\mu=55 \mathrm{mPa}\)
Journal RPM, \(N=1100 \mathrm{rev} / \mathrm{min}\)
\(W=1.2 \mathrm{kN}\)