HW8A shaft fitted with a flywheel rotates at 650 r.p.m. and drives a machine. Thetorque of machine varies in a cyclic manner over a period of 2 revolutions. Thetorque rises from 650 N-m to 2200 N-m uniformly during 110° and remainsconstant for the following 270°. It then falls uniformly to 600 N-m during the next100° and remains constant for the end cycle, the cycle being repeated thereafter.Determine the power required to drive the machine and percentage fluctuation inspeed, if the driving torque applied to the shaft is constant and the mass of theflywheel is 180 kg with radius of gyration of 35 cm.HW9

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Answered: HW8 A shaft fitted with a flywheel…

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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A horizontal belt conveyor arranged as shown in the figure P1 below operates at a speed of 270fpm and requires 25 Hp at the 40-inch-diameter driving drum. The drum receives power from a countershaftthrough a pair of spur gears. A motor operating at 860 rpm delivers power to the countershaft through aroller chain. The mechanical efficiency of the chain drive is 94 % and of the gears is 96 %. a) Determine theHp of the motor you would recommend. b) Determine the rpm of the driving drum and the countershaft. c)Calculate the number of teeth on the large sprocket required running the conveyor belt at the speedspecified. d) Determine the transmitted torque on the countershaft, in in-lb.
The turning-moment diagram for one cycle of a multi-cylinder engine shows fluctuations in energy above and below the mean-torque line as follows: –62·5 J, +105·7 J, –27·3 J, +63·3 J, –59·1 J, +25·2 J, –99·3 J and +54 J. Sketch the diagram and use it to find the mass of the flywheel, radius of gyration 220 mm, needed to keep the engine speed within the range 898 to 902 rev/min
Q2: The gear of epicyclic involve a planet wheel which have 28 teeth, sun wheel which has 24 teeth, and an internal toothed annulus which is held stationary. Neglecting friction, if the sun wheel rotates at 700 rev/min, determine the torque required to hold the annulus at rest when 9 kW is being transmitted. What is the diameter of the circle traced out by the centers of the planet wheels, if the teeth have a module of 4.
Clutch Mechanism 8. In the clutch mechanism shown, two flat circular disks of radius R are mounted so that they can be brought into contact causing a net frictional force. The contact pressure in general depends on the distance from the center and in one specific case may be modeled buy P(r) = Poe-kr, where k is a constant and r is the distance from the center of the discs. The integral cR F = 2m " P(r)rdr gives the total contact force between the discs. Cross-section a. In your own words explain where this formula comes from.
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Parvinbhai
A motor drive has three different loads, first is rotational motion and coupled directly to the motor with the torque of 3 Nm. Second a rotational load is connected to the first load through a reduction gear with the ratio of 1:4. This load has a moment of inertia of 12 kg.m² and torque of 8 Nm. The third load is connected to the second rotational load that has a translational motion and consists of 1250 kg weight to be lifted up at a uniform speed of 115 meter per-minutes. The gear and translational system have efficiency of 85% and 90%, respectively. At this condition, the motor has an inertia of 0.3 kg.m² runs at a constant speed of 1350 rpm. If the transmission losses are neglected, (i) draw and label the block diagram to represent the drive system. (ii) calculate the equivalent inertia referred to the motor shaft. (iii) determine the total developed torque from the motor. (iv) examine the developed power from the motor.
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A shaft is fixed at support C and has a torque of 75lb.ft with respect to free end at a distance of 0.75ft from C. It remains constant for 0.75ft before a negative uniformly distributed torque of 1200lb.ft/ft at a distance of 1.5ft is introduced. The shaft then remains flat for 1.5ft to free end with a torque of 600lb.ft. where in the shaft is the torque equals to negative 1200lb.ft measured from the free end?
A single cylinder reciprocating engine has speed 240 rpm, stroke 300 mm, mass of reciprocating parts 60 kg, mass of revolving parts at 200 mm radius is 37 kg. If three-fifth of the reciprocating parts and all the revolving parts are to be balanced, find: the balance mass required at a radius of 500 mm, and the residual unbalanced force when the crank has rotated 60° from top dead center. 28.00 kg, 3481.74 N 20.33 kg, 1406.76 N 25.13 kg, 2637.68 N 21.94 kg, 1899.13 N 29.20 kg, 4220.29 N
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Please answer the question in 5mins I will rate your answer. Cam mechanisms are used in many machines. For example, cams open and close the valves in your car engine to admit gasoline vapor to each cylinder and to allow the escape of exhaust. The principle is illustrated in the figure below, showing a follower rod (also called a pushrod) of mass m resting on a wedge of mass M. The sliding wedge duplicates the function of a rotating eccentric disk on a camshaft in your car. Assume that there is no friction between the wedge and the base, between the pushrod and the wedge, or between the rod and the guide through which it slides. When the wedge is pushed to the left by the force F, the rod moves upward and does something such as opening a valve. By varying the shape of the wedge, the motion of the follower rod could be made quite complex, but assume that the wedge makes a constant angle of ? = 19.0°. Suppose you want the wedge and the rod to start from rest and move with constant…

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