A polyamide A-3 flat belt 6 in wide is used to transmit 15 hp under light shock con- ditions where K, = 1.25, and a factor of safety equal to or greater than 1.1 is appro- priate. The pulley rotational axes are parallel and in the horizontal plane. The shafts are 8 ft apart. The 6-in driving pulley rotates at 1750 rev/min in such a way that the loose side is on top. The driven pulley is 18 in in diameter. See Fig. 17-10. The fac- tor of safety is for unquantifiable exigencies. (a) Estimate the centrifugal tension F. and the torque T. (b) Estimate the allowable F1, F2, F; and allowable power H.. (c) Estimate the factor of safety. Is it satisfactory?
A polyamide A-3 flat belt 6 in wide is used to transmit 15 hp under light shock con- ditions where K, = 1.25, and a factor of safety equal to or greater than 1.1 is appro- priate. The pulley rotational axes are parallel and in the horizontal plane. The shafts are 8 ft apart. The 6-in driving pulley rotates at 1750 rev/min in such a way that the loose side is on top. The driven pulley is 18 in in diameter. See Fig. 17-10. The fac- tor of safety is for unquantifiable exigencies. (a) Estimate the centrifugal tension F. and the torque T. (b) Estimate the allowable F1, F2, F; and allowable power H.. (c) Estimate the factor of safety. Is it satisfactory?
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 7.70P: Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at...
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