A bearing for the output shaft of a 150 kW motor is to be heated to expand it enough to press on the shaft. At 21°C the bearing has an inside diameter of 10 cm and an outside diameter of 17.5 cm. The shaft has an outside diameter of 10.01 cm. The modulus of elasticity for the shaft and bearing is 210 × 103 MPa and the coefficient of thermal expansion is 12.06 × 10-6 cm/cm per °C. (a) At what temperature will the bearing have 0.013 of clearance to fit over the shaft? (b) After it is assembled and cooled, what is the radial pressure between the bearing and shaft? (c) Determine the maximum effective stress in the bearing

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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A bearing for the output shaft of a 150 kW motor is to be heated to expand it enough to press on the shaft. At 21°C the bearing has an inside diameter of 10 cm and an outside diameter of 17.5 cm. The shaft has an outside diameter of 10.01 cm. The modulus of elasticity for the shaft and bearing is 210 × 10³MPa and the coefficient of thermal expansion is 12.06 × 10^-6cm/cm per °C. (a) At what temperature will the bearing have 0.013 of clearance to fit over the shaft? (b) After it is assembled and cooled, what is the radial pressure between the bearing and shaft? (c) Determine the maximum effective stress in the bearing

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