a Dashboard曲 EventsE My CoursesThis courseTWo pulleys of radius 290 Tmm and 190 mm are mounted in an open-belt drive arrangement on two parallel shafts.The pulleys center lines are 0.58 m apart.of 15stionThe big pulley is rotating at 98 rpm and the coefficient of friction between the belt and the pulleys is 0.25 and thetensile force allowed in the belt is 1.2kN.Analyze the belt drive system and calculate:The contact angle at the big pulley: Opig° (1)The contact angle at the small pulley: 0smrad° (2)STmThe length of the belt, assuming a negligible thickness:т (3)The torque at the big pulley:Nm, and (1)The torque at the small pulley:Nm (1)The maximum power transmitted through the belt drive systemkW (1)If the total mass of the belt is 2.3 kg, assuming a firm grip between pulleys and the belt and the same speed, all otherrelevant parameters remaining the same as in the statement above, you are required to revisit your analysis withrespect to the centrifugal effect due to the mass of the belt and calculate• The updated tension in the tight belt:N. (2)• The tension in the slack belt:N(1)• The updated power due to the effect of the centrifugal tenslon:KW (2)

As per the guidelines I am able to answer first 3 subparts only. So please repost the remaining…

A Dashboard 曲Events E My Courses ch This course Two pulleys of radius 290 mm and 190 mm are mounted in an open-belt drive arrangement on two parallel shafts. The pulleys center lines are 0.58 m apart. of 15 stion The big pulley is rotating at 98 rpm and the coefficient of friction between the belt and the pulleys is 0.25 and the tensile force allowed in the belt is 1.2kN. Analyze the belt drive system and calculate: The contact angle at the big pulley: Opig o (1) The contact angle at the small pulley: 0,m rad ° (2) %3D The length of the belt, assuming a negligible thickness: т (3)

A Dashboard 曲Events E My Courses ch This course Two pulleys of radius 290 mm and 190 mm are mounted in an open-belt drive arrangement on two parallel shafts. The pulleys center lines are 0.58 m apart. of 15 stion The big pulley is rotating at 98 rpm and the coefficient of friction between the belt and the pulleys is 0.25 and the tensile force allowed in the belt is 1.2kN. Analyze the belt drive system and calculate: The contact angle at the big pulley: Opig o (1) The contact angle at the small pulley: 0,m rad ° (2) %3D The length of the belt, assuming a negligible thickness: т (3)

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...

See similar textbooks

Similar questions

The coeffient of static friction between the uniform bar AB of weight W and the ground is 0.45. Find the smallest angle and the corresponding force P that would initiate simultaneous tipping and sliding of the bar.
A uniform plank is supported by a fixed support at A and a drum at B that rotates clockwise. The coefficients of static and kinetic friction for the two points of contact are as shown. Determine whether the plank moves from the position shown if (a) the plank is placed in position before the drum is set in motion; and (b) the plank is first placed on the support at A and then lowered onto the drum, which is already rotating.
A V-belt drives a pulley at a speed of 1440 m/min. The coefficient of friction between belt and pulley is 0.3, semi V-groove angle is 22.5 degree and angle of contact of belt with the pulley is 160 degree. Ifthe mass of the belt is 0.45 kg/m and if permissible pull in the belt is 800 N. Calculate the power.(Consider the centrifugal tension in the belt.)
Prob # 9. Find the horsepower transmitted by a pair of friction wheels, the diameter of driving wheel is 10 inches, and it revolves at 200 rpm. The width of the wheel is 2 inches. The force per inch width of face is 150 pound and the coefficient of friction is 0.20. a. 96 hp b. 23 hp c. 1.2 hp d. 1.6 hp
Estimate the power of an electric motor driven power screwthatmoves a nut in a horizontal plane against a force of 80kN at a speed of 300 mm/min. The screw has a doublesquare thread of 6 mm pitch on a nominaldiameter of 40 mm. The coefficient of friction at screw threads is 0.15.
estion 3 A flat belt drive connects two pulleys 5 meters apart. The 2m pulley diameter driver rotates at 350rpm, and the driven pulley has a diameter of 1.5m. The thickness and the mass of the belt drive is 5mm and 0.6kg respectively. The coefficient of friction between the belt and the pulley is 0.25. The belt experience 3% of slip during power transmission with a maximum tension of 1200N. Calculate the speed and torque of the driven shaft.
Two parallel shafts whose centre lines are 4 m apart, are connected by an open belt drive. The diameter of the larger pulley is 1.8 m and that of smaller pulley 3 m. The initial tension in the belt when stationary is 3 kN. The coefficient of friction between the belt and the pulley is 0.3. Calculate the power transmitted, when the smaller pulley rotates at 550 r.p.m. and length of the belt.
A flat belt passes over two idler pulleys and under a rotating drumof diameter 8 in. The axle of the drum is free to move vertically ina slot, and a spring keeps the drum in contact with the belt. Whatis the minimum force which should be exerted by the spring if slippageis not to occur when a 30-lb · ft torque is applied to the drum? Thecoefficient of static friction between belt and drum is 0.30 and theangle of contact is 180 degrees.
In an engine governor of the Porter type, the upper and lower arms are 200 mm and 250 mm respectively and pivoted on the axis of rotation. The mass of the central load is 15 kg, the mass of each ball is 2 kg and friction of the sleeve together with the resistance of the operating gear is equal to a load of 24 N at the sleeve. If the limiting inclinations of the upper arms to the vertical are 30° and 40°, find, taking friction into account, range of speed of the governor.
2. A square threaded screw of mean diameter 25 mm and pitch of thread 6 mm is utilised to lift a weight of 10 kN by a horizontal force applied at the circumference of the screw. Find the magnitude of the [Ans. 966 N] force if the coefficient of friction between the nut and screw is 0.02. A bolt with a squore threaded screw has mean diameter of 25 mm and a nitch of 23 mm It carries an
A ladder of length 2L and mass M is positioned on level ground leaning against a wall such that the angle between the ladder and the horizontal is @. The coefficient of static friction between the ladder and the wall and between the ladder and the ground is jistatic = 0.66. The centre of mass of the ladder is halfway along it. For the ladder to be in mechanical equilibrium: Consider torques about the centre of the ladder. In which direction (into or out of the page) does the torque due to each of the 5 forces force act?Write down an equation for the sum of the torques about the centre or mass of the ladder and then use your equation for the torques to derive an expression for tan o in terms of the magnitudes of the forces acting
3. A V-belt drives a pulley at a speed of 1440 m/min. The coefficient of friction between belt and pulley is 0.3, semi V-groove angle is 22.5° and angle of contact of belt with the pulley is 160°. If the mass of the belt is 0.45 kg/m and if permissible pull in the belt is 800 N. Calculate the power. Consider the centrifugal tension in the belt.