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Machine Design Quiz 12: Clearance, Power Loss, Side Flow, Oil Temp. Rise - Prof. Donald Wa, Quizzes of Mechanical Engineering

University of Alabama - HuntsvilleMechanical Engineering
Prof. Donald Wallace

A quiz from a machine design course, me 466, during the fall semester, 2001. Students are required to determine the radial clearance, power loss, side flow loss, oil temperature rise, and understand trumpler's factor of safety for a journal bearing operating under given conditions.

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Pre 2010

Uploaded on 07/23/2009

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ME 466 - Machine Design NAME _________________________________
Fall Semester, 2001
Quiz 12, 25 Points, Open Book
A full journal bearing in a machine carries a load of 1.35 kN and has
a diameter of 30 mm and a length of 30mm. The bearing operates at
a speed of 1800 rpm and it is to operate at minimum friction. It uses
SAE 40 oil at an average operating temperature of 50°C. Determine
the desired radial clearance, the power loss, the side flow loss, and
the rise in temperature of the oil. What is Trumpler's criteria “factor
of safety”?
Radial Clearance
Power loss
Side flow loss
Oil temperature rise
Trumpler factor of safety?

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ME 466 - Machine Design NAME _________________________________

Fall Semester, 2001

Quiz 12, 25 Points, Open Book

A full journal bearing in a machine carries a load of 1.35 kN and has a diameter of 30 mm and a length of 30mm. The bearing operates at a speed of 1800 rpm and it is to operate at minimum friction. It uses SAE 40 oil at an average operating temperature of 50°C. Determine the desired radial clearance, the power loss, the side flow loss, and the rise in temperature of the oil. What is Trumpler's criteria “factor of safety”?

Radial Clearance

Power loss

Side flow loss

Oil temperature rise

Trumpler factor of safety?