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Roman55
1 month ago
10

An overhang hollow shaft carries a 900 mm diameter pulley, whose centre is 250 mm from the centre of the nearest bearing. The we

ight of the pulley is 600 N and the angle of lap is 180°. The pulley is driven by a motor vertically below it. If permissible tension in the belt is 2650 N and if coefficient of friction between the belt and pulley surface is 0.3, estimate, diameters of shaft, when the internal diameter is 0.6 of the external. Neglect centrifugal tension and assume permissible tensile and shear stresses in the shaft as 84 MPa and 68 MPa respectively.
Physics
1 answer:
Sav [3.1K]1 month ago
6 0
Estimate the diameter of the shaft, noting that it has a 900 mm diameter pulley, whose center lies 250 mm from the nearest bearing. The pulley weighs 600 N, and the angle of lap is 180 degrees. The pulley is moved by a motor positioned vertically beneath it. With a permissible belt tension of 2650 N and a friction coefficient of 0.3, calculate the diameters of the shaft, taking into account that the internal diameter is 0.6 times the external diameter. Neglect centrifugal tension and assume allowable tensile and shear stresses in the shaft are set at 84 MPa and 68 MPa, respectively.
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