A belt drive is required to transmit 10 kW from a motor running at "600 rpm. The belt is 12 mm thick -and -has a mass density of 0.001 g/mm3. Safe stress in the belt is not to exceed 2.5 N/mm2. Diameter of the driving pulley is 250 mm, whereas the speed of the driven pulley is 220 rpm. The two shafts are 1.25 m apart. The coefficient of friction is 0.25. Determine the width of the belt.

A belt drive is required to transmit 10 kW from a motor running at "600 rpm. The belt is 12 mm thick -and -has a mass density of 0.001 g/mm3. Safe stress in the belt is not to exceed 2.5 N/mm2. Diameter of the driving pulley is 250 mm, whereas the speed of the driven pulley is 220 rpm. The two shafts are 1.25 m apart. The coefficient of friction is 0.25. Determine the width of the belt.

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 7.73P: The normal pressure acting on the disk of the sander is given by p=(4/3)+(r2/6), where p is the...

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The normal pressure acting on the disk of the sander is given by p=(4/3)+(r2/6), where p is the pressure in pounds per square inch (psi) and r represents the radial distance in inches. Determine the torque C required to operate the sander at constant speed if the kinetic coefficient of friction for the surface being sanded is 0.86.
.Two pulleys which are 270 mm in diameter and which are run at 1030 rpm are connected by a V-belt with an angle of groove of 30°. The cross-section area (b x t) of the belt is 750 mm2 and the maximum tensile stress in the material is 4.8 MPa. Determine the power transmitted between the pulley in kW if the centrifugal tension of the belt is 439 N and the coefficient of friction between belt and pulley is 0.19.
Power Transmission A power transmission system consists of a motor connected to a pulley and a belt. The motor has a power output of 10 kW and operates at a speed of 1200 rpm. The pulley connected to the motor has a diameter of 300 mm, while the pulley connected to the driven shaft has a diameter of 600 mm. The belt used has a coefficient of friction of 0.3. Determine the maximum torque that can be transmitted by the system and the rotational speed of the driven shaft.
7.An exhaust fan fitted with 900 mm diameter pulley is driven by a flat belt from a 30 kW, 950 r.p.m. squirrel cage motor. The pulley on the motor shaft is 250 mm in diameter and the centre distance between the fan and motor is 2.25 m. The belt is 100 mm wide with a coefficient of friction of 0.25. If the allowable stress in the belt material is not to exceed 2 MPa, determine the necessary thickness of the belt and its total length. Take centrifugal force effect into consideration for density of belt being 950 kg/m3. [
A leather belt is required to transmit 7.5 Kw of power from a pulley 1.2m in diameter at 250 rpm. The lap angle (contact angle between small pulley and belt) is 165o and the coefficient of friction of friction between the belt and the pulley is 0.3. If the safe working stress for the leather belt is 1.5 MPa, density of leather 1 Mg/m3 and thickness of belt 10 mm, determine the tension in the both (tight and slack) side and width of the belt taking centrifugal tension into account.
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A leather belt which is 125 mm wide and 6 mm thick, is used for transmitting power from a pulley. The diameter of the pulley is 750 mm and its angular speed is 500 rpm. The angle of lap is 150° and coefficient of friction is 0.3. If the mass of 1 m3 of leather is 1 kg and stress in the belt is not to exceed 2.75 MPa then find the maximum power that can be transmitted by the bel
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