A 360° journal bearing is 3 in. long and carries a 4 in. diameter shaft with a radial clearance of 0.0025 in. The shaft supports a radial load of 1000 lbs. and a speed of 500 rpm. The operating temperature for the bearing is 140°F and SAE-20 oil is used for bearing lubrication. For these conditions, evaluate the following by Petroff’s equation: 1. Friction coefficient for the bearing. 2. Heat energy lost due to friction in the bearing, in horsepower.
A 360° journal bearing is 3 in. long and carries a 4 in. diameter shaft with a radial clearance of 0.0025 in. The shaft supports a radial load of 1000 lbs. and a speed of 500 rpm. The operating temperature for the bearing is 140°F and SAE-20 oil is used for bearing lubrication. For these conditions, evaluate the following by Petroff’s equation: 1. Friction coefficient for the bearing. 2. Heat energy lost due to friction in the bearing, in horsepower.
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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A 360° journal bearing is 3 in. long and carries a 4 in. diameter shaft with a radial clearance of 0.0025 in. The shaft supports a radial load of 1000 lbs. and a speed of 500 rpm. The operating temperature for the bearing is 140°F and SAE-20 oil is used for bearing lubrication. For these conditions, evaluate the following by Petroff’s equation:
1. Friction coefficient for the bearing.
2. Heat energy lost due to friction in the bearing, in horsepower.
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