A 320 kW motor rotates at a speed of 900 rpm. The power from this motor...
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A 320 kW motor rotates at a speed of 900 rpm. The power from this motor armature shall be transmitted to another shaft of 60 mm diameter by a rigid coupling. If the number of the bolts (N) is 6; determine the minimum dimension of the bolt circle? Bolt diameter is 10 mm and bolts are made of steel of ou = 640 MPa. Use a Factor of Safety of 2.4 for Shear; Tu = 1/2 (ou) (20 Points) Q-2. A V-Belt drive is to be used for a water pump driven by an electric motor. The power of the electric motor 24 kW @ 1200 rpm and this is to be transferred by using the belt given below. The pitch circle diameter of the smaller pulley is 240 mm and the reduction ratio is 2/3. The center distance (C) of the sheaves is 700 mm. If the mass per unit length of the belt is 1.2 kg/m, & the allowable belt tension is 900 N; how many belts are required? NOTE: Coefficient of Friction between the belt and the sheaves is 0.2 (30 Points) 25,5mm- 8V 40* 23.0mm Q-3. A single disk clutch is to be designed to transmit 6 kW of power at 600 rpm. The disks have an inner disk radius of 80 mm, outer disk radius of 160 mm. The coefficient of friction is 0.20. Maximum brake pressure available with the hydraulic system is 4 bars. Determine: 1. What would be the axial force required to transmit the whole power stated? 2. What would be the axial force required to transmit the whole power stated if the average diameter of the disks is reduced by 10 mm? (30 Points) A 320 kW motor rotates at a speed of 900 rpm. The power from this motor armature shall be transmitted to another shaft of 60 mm diameter by a rigid coupling. If the number of the bolts (N) is 6; determine the minimum dimension of the bolt circle? Bolt diameter is 10 mm and bolts are made of steel of ou = 640 MPa. Use a Factor of Safety of 2.4 for Shear; Tu = 1/2 (ou) (20 Points) Q-2. A V-Belt drive is to be used for a water pump driven by an electric motor. The power of the electric motor 24 kW @ 1200 rpm and this is to be transferred by using the belt given below. The pitch circle diameter of the smaller pulley is 240 mm and the reduction ratio is 2/3. The center distance (C) of the sheaves is 700 mm. If the mass per unit length of the belt is 1.2 kg/m, & the allowable belt tension is 900 N; how many belts are required? NOTE: Coefficient of Friction between the belt and the sheaves is 0.2 (30 Points) 25,5mm- 8V 40* 23.0mm Q-3. A single disk clutch is to be designed to transmit 6 kW of power at 600 rpm. The disks have an inner disk radius of 80 mm, outer disk radius of 160 mm. The coefficient of friction is 0.20. Maximum brake pressure available with the hydraulic system is 4 bars. Determine: 1. What would be the axial force required to transmit the whole power stated? 2. What would be the axial force required to transmit the whole power stated if the average diameter of the disks is reduced by 10 mm? (30 Points)
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SOLUTION Q1 A 320 kW motor rotates at a speed of 900 rpm The power from this motor armature shall be transmitted to another shaft of 60 mm diameter by a rigid coupling If the number of the bolts N is ... View the full answer
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