Q2 A power transmission shaft 1500 mm long is supported at two points A and B. While A is at the left extreme end of the shaft. B is at a distance of 400 mm from the right extreme end of the shaft. The shaft receives a power of 50 kW at a rated speed of 500 rpm through a belt drive located at the right extreme end of the shaft. The belt pulley has a diameter of 400 mm and weighs 1 kN. The belts moving on the pulley is directed away from the observer below the horizontal and inclined at 45° to it. The ratio of belt tensions is 3. This power is given out through a gear dhe located at a distance of 500 mm from the right support B. The gear mounted on the shaft has a pitch diameter of 200 imm and weighs 400 N. The other gear, which meshes with this gear is placed exactly in front. The gear teeth have a pressure angle of 20°. The shaft is made of plain carbon steel 40C8 (Sut 650 N/mm² and Syt = 380 N/mm²). Determine the diameter of the shaft according to the ASME code if, k, 1.75 and k₁ = 1.25.
Q2
A power transmission shaft 1500 mm long is supported at two points A and B. While A is at the left extreme end of the shaft. B is at a distance of 400 mm from the right extreme end of the shaft. The shaft receives a power of 50 kW at a rated speed of 500 rpm through a belt drive located at the right extreme end of the shaft. The belt pulley has a diameter of 400 mm and weighs 1 kN. The belts moving on the pulley is directed away from the observer below the horizontal and inclined at 45° to it. The ratio of belt tensions is 3. This power is given out through a gear dhe located at a distance of 500 mm from the right support B. The gear mounted on the shaft has a pitch diameter of 200 imm and weighs 400 N. The other gear, which meshes with this gear is placed exactly in front. The gear teeth have a pressure angle of 20°. The shaft is made of plain carbon steel 40C8 (Sut 650 N/mm² and Syt = 380 N/mm²). Determine the diameter of the shaft according to the ASME code if, k, 1.75 and k₁ = 1.25.
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