THE ENGINE OF AN AUTOMOBILE IS RATEDTO GIVE SOKWAT 200 RPM WÍTH AMAXIMUM TORQUE OF 600 N-M. DESIGN ADRY SINGLE-PLATE CLUTCH ASSUMINGTHE OUTER RADIUS OF THE FRICTIONPLATE TO BE 1.2 TIMES THE INNERRADIUS. THE COEFFICIENT OF FRICTION IS0.25 AND THE INTENSITY OF PRESSUREBETWEEN THE PLATES IS NOT TO EXCEED80 KN/M2. SIX SPRINGS ARE USED TOPROVIDE AXIAL FORCE NECESSARY TOENGAGE THE CLUTCH AND EACH SPRINGHAS A STIFFNESS OF 50 N/MM. FIND THEINITLAL COMPRESSION IN THE SPRINGSAND DIMENSIONS OF THE FRICTION PLATE.

Answered: THE ENGINE OF AN AUTOMOBILE IS RATED TO…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The figure shows a system with a block m1 attached to a simple square thread screw with a mean diameter of 10 mm, a pitch of 3 mm and whose coefficient of static friction on the thread is 0.35. Block m1 is attached to block m2 by a rope, each of blocks m1 and m2 have a mass of 4 kg.Block m2 is in turn attached to a 15-kg block W by another rope, which passes over a static drum where the coefficient of static friction is 0.20. Determine the required Moment M that must be applied to the screw to start lifting block W. The coefficient of static friction between the surface and blocks m1 and m2 is 0.25. Need free body diagrams
A multiple disc clutch has three discs on the driving shaft and two on the driven shaft, providing four pairs of contact surfaces. The outer diameter of the contact surfaces is 250 mm and the inner diameter is 150 mm. Determine the maximum axial intensity of pressure between the discs for transmitting 18.75 kW at 500 r.p.m. Assume uniform wear and coefficient of friction as 0.3.
Two machines are coupled by means of a clutch plate with 2 contact surfaces. The plate has an inner diameter of 125 mm and an outer diameter of 200 mm and the coefficient of friction between mating surfaces is 0.35. It is assumed that shafts of both machines are co-axial and the driving shaft is rotating at a constant speed of 240 rev/min when it is suddenly brought in contact with the driven shaft/machine initially rotating at 20 rev/min. The Moment of Inertia of the driven machine is 21 kgm2. A slippage period of 6.8 sec is observed while the driven machine is brought to the full speed of the driving shaft. Analyse the frictional power transmission and calculate: The magnitude of the torque necessary to cause the described acceleration of the driven shaft :

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