Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780073398204
Author: Richard G Budynas, Keith J Nisbett
Publisher: McGraw-Hill Education
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Chapter 12, Problem 12P

(a)

To determine

The magnitude of the minimum oil film thickness.

The location of minimum oil film thickness.

(b)

To determine

The eccentricity.

(c)

To determine

The coefficient of friction.

(d)

To determine

The rate of power loss.

(e)

To determine

The total oil flow rate.

The side oil flow rate.

(f)

To determine

The maximum oil film pressure.

The angular location of the maximum oil film pressure.

(g)

To determine

The terminating position of the oil film.

(h)

To determine

The average temperature of the side flow.

(i)

To determine

The oil temperature at the terminating position of the oil film.

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Students have asked these similar questions
A journal bearing has a shaft diameter of 75.00 mm with a unilateral tolerance of -0.02 mm. The bushing bore has a diameter of 75.10 mm with a unilateral tolerance of 0.06 mm. The bushing is 36 mm long and supports a load of 2 kN. The journal speed is 720 rev/min. For the minimum clearance assembly find the minimum film thickness, the heat loss rate, and the maximum lubricant pressure for SAE 20 and SAE 40 lubricants operating at an average film temperature of 60°C.
Q 2. A journal bearing has a shaft diameter of 75.00 mm with a unilateral tolerance of −0.02 mm. The bushing bore has a diameter of 75.10 mm with a unilateral tolerance of 0.06 mm. The bushing is 36 mm long and supports a load of 2 kN. The journal speed is 700 rev/min. For the minimum clearance assembly find the minimum film thickness, the heat loss rate, and the maximum lubricant pressure for SAE 30, SAE 40 and SAE 50 lubricants operating at an average film temperature of 60 °C.
The design of journal bearings usually involves two suitable combinations of variables: variables under control and dependent variables or performance factors. As such, a full journal bearing has a shaft journal diameter of 27 mm with a unilateral tolerance of 20.01 mm. The bushing bore has a diameter of 27.04 mm with a unilateral tolerance of 0.03 mm. The //d ratio is unity. The bushing load is 1.03 kN, and the journal rotates at 1153 rev/min. You are required to analyze the minimum clearance assembly if the average viscosity is 50 mPa.s to find the minimum oil film thickness, the power loss, and the percentage of side flow.
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