Q1) The mean diameter of the driving pulley for a vee-belt drive with two belts is 110 mm. The pulley groove angle is 40° and the drive transmits 4.4 kW at a speed of rotation of 1500 rev/min. The coefficient of friction between belt and pulley 0.32, and the angle of lap is 160°. Determine the driving torque and the maximum stress in the belt material if the cross-sectional area of each belt is 120 mm2.

Q1) The mean diameter of the driving pulley for a vee-belt drive with two belts is 110 mm. The pulley groove angle is 40° and the drive transmits 4.4 kW at a speed of rotation of 1500 rev/min. The coefficient of friction between belt and pulley 0.32, and the angle of lap is 160°. Determine the driving torque and the maximum stress in the belt material if the cross-sectional area of each belt is 120 mm2.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.57P: The square-threaded screw with a pitch of 10 mm and a mean radius of 18 mm drives a gear that has a...

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The square-threaded screw with a pitch of 10 mm and a mean radius of 18 mm drives a gear that has a mean radius of 75 mm. The static and kinetic coefficients of friction between the gear and the screw are 0.12 and 0.06, respectively. The input torque applied to the screw is C0=10Nm. Assuming constant speed operation, determine the output torque C1 acting on the gear.
. The mean diameter of the driving pulley for a vec-belt drive with two belts is 110 mm. The pulley groove angle is 40° and the drive transmits 4.4 kW at a speed of rotation of 1500 rev/min. The coefficient of frietion between belt and pulley 0.32, and the angle of lap is 160°. Determine the driving torque and the maximum stress in the belt material if the cross-sectional area of each belt is 120 mm.
Friction belt quiz Q1) The mean diameter of the driving pulley for a vee-belt drive with two belts is 110 mm. The pulley groove angle is 40° and the drive transmits 4.4 kW at a speed of rotation of 1500 rev/min. The coefficient of friction between belt and pulley 0.32, and the angle of lap is 160°. Determine the driving torque and the maximum stress in the belt material if the cross-sectional area of each belt is 120 mm2.
Q1) The mean diameter of the driving pulley for a vee-belt drive with two belts is 110 mm. The pulley groove angle is 40° and the drive transmits 4.4 kW at a speed of rotation of 1500 rev/min. The coefficient of friction between belt and pulley 0.32, and the angle of lap is 160°. Determine the driving torque and the maximum stress in the belt material if the cross-sectional area of each belt is 120 mm2.
Q2/A belt drive consist of two V– belts in parallel, on grooved pulleys of the same size. The angle of the groove is 30°. The cross – section area of each belt is 750 mm? and u is 0.12. The density of the belt material is 1.2 Mg/m³ and the maximum safe stress in the material is 7 MN/m?. Answer the following questions 1- The centrifugal tension in belts is (a) increases power transmitted (b) decreases power transmitted (c) have no effect on power transmitted (d) increases power transmitted up to a certain speed and then decreases
4.) A flat belt makes contact with an 16 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45 , and a torque of300ft−bsis to be transmitted, calculate the belt tensions. (please type answer not write by hend)
A 750 mm steel pulley transmits 120 hp at 700 rpm. The arc of contact between the belt and pulley is 152 degrees, the coefficient of friction between belt and pulley is 0.30 and the safe working stress of the belt is 2.0 MPa. Find the width of the belt used in mm if its thickness is 20 mm.
The width of the belt used if its thickness is 6 mm. Ans. 261 mm 8. A nylon-core flat belt has an elastomer envelop; is 200 mm wide, and transmits 60 KW at a belt speed of 25 m/s. The belt has a mass of 2 kg/m of the belt length. The belt is used in a crossed configuration to connect a 300 mm diameter driving pulley to a 900 mm diameter driven pulley at a shaft spacing of 6 m. A. Calculate the belt length and the angles of wrap. Ans. 13.95 m, 3.34 rad or 191.4° B. Compute the belt tensions based on a coefficient of friction of 0.33. Ans. 1.76 KN, 1.96 KN
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3. Design a compression coupling for a shaft to transmit 1300 N-m. The allowable shear stress for the shaft and key is 40 MPa and the number of bolts connecting the two halves are 4. The permissible tensile stress for the bolts material is 70 MPa. The coefficient of friction between the muff and the shaft surface may be taken as 0.3.
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