Q10/ Two shafts whose centers are I m apart are connected by an open V-belt drive....
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Q10/ Two shafts whose centers are I m apart are connected by an open V-belt drive. The driving pulley is supplied with 100 kW and has an effective diameter of 300 mm. It runs at 1000 rpm while the driven pulley runs at 375 rpm. The angle of groove on the pulleys is 40°. The permissible tension in 400 mm cross-sectional area belt is 2.1 MPa. The density of the belt is 1100 kg/m. The coefficient of friction between the belt and pulley is 0.28. Estimate the number of belts required. Q11/ A leather belt 125 mm wide and 6 mm thick, transmits power from a pulley 750 mm diameter which runs at 500 rpm. The tension ratio is equal to 2.2 and u = 0.3. If the mass of 1 m of leather is 1 Mg and the stress in the belt is not to exceed 2.75 MPa, find (a) the angle of contact (in degree) and (b) the maximum power that can be transmitted. Q12/ An electric motor drive an exhaust fan through an open belt drive. Following data are provided: Motor Pulley 400 Fan Pulley 1600 Diameter (mm) Angle of contact (radians) 2.5 Coefficient of friction 0.3 Speed (гpm) Power transmitted (kW) 700 22.5 Calculate the width of 5 mm thick flat belt. Take permissible stress for the belt material as 2.3 MPa, and assuming the density of the belt is 1000 kg/m. Q13/ A rope drive are required to transmit 750 kW from a pulley of 1 m diameter running at 450 rpm. The safe pull in each rope is 2250 N and the mass of the rope is 1 kg /m length. The angle of lap and the groove angle are 150° and 45° respectively. Find the number of ropes required for the drive if the coefficient of friction between the rope and the pulley is 0.3. Q14/ A shaft rotating at 200 rpm drive another shaft at 300 rpm and transmit 6 kW through a belt. The belt is 100 mm wide and 10 mm thick. The distance between the shafts is 4m.The smaller pulley is 0.5 m in diameter. Calculate the stress in the belt, if it is a cross belt drive. Take u = 0.3. 10-10 Q10/ Two shafts whose centers are I m apart are connected by an open V-belt drive. The driving pulley is supplied with 100 kW and has an effective diameter of 300 mm. It runs at 1000 rpm while the driven pulley runs at 375 rpm. The angle of groove on the pulleys is 40°. The permissible tension in 400 mm cross-sectional area belt is 2.1 MPa. The density of the belt is 1100 kg/m. The coefficient of friction between the belt and pulley is 0.28. Estimate the number of belts required. Q11/ A leather belt 125 mm wide and 6 mm thick, transmits power from a pulley 750 mm diameter which runs at 500 rpm. The tension ratio is equal to 2.2 and u = 0.3. If the mass of 1 m of leather is 1 Mg and the stress in the belt is not to exceed 2.75 MPa, find (a) the angle of contact (in degree) and (b) the maximum power that can be transmitted. Q12/ An electric motor drive an exhaust fan through an open belt drive. Following data are provided: Motor Pulley 400 Fan Pulley 1600 Diameter (mm) Angle of contact (radians) 2.5 Coefficient of friction 0.3 Speed (гpm) Power transmitted (kW) 700 22.5 Calculate the width of 5 mm thick flat belt. Take permissible stress for the belt material as 2.3 MPa, and assuming the density of the belt is 1000 kg/m. Q13/ A rope drive are required to transmit 750 kW from a pulley of 1 m diameter running at 450 rpm. The safe pull in each rope is 2250 N and the mass of the rope is 1 kg /m length. The angle of lap and the groove angle are 150° and 45° respectively. Find the number of ropes required for the drive if the coefficient of friction between the rope and the pulley is 0.3. Q14/ A shaft rotating at 200 rpm drive another shaft at 300 rpm and transmit 6 kW through a belt. The belt is 100 mm wide and 10 mm thick. The distance between the shafts is 4m.The smaller pulley is 0.5 m in diameter. Calculate the stress in the belt, if it is a cross belt drive. Take u = 0.3. 10-10
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y Finding distance of the Driving Pully N 1000 N2 375 300 Somm Calcalating mass fon umit length of ... View the full answer
Related Book For
Fundamentals Of Hydraulic Engineering Systems
ISBN: 978-0136016380
4th Edition
Authors: Robert J. Houghtalen, A. Osman H. Akan, Ned H. C. Hwang
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