Answered: A horizontal belt conveyor arranged as…

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 270
fpm and requires 25 Hp at the 40-inch-diameter driving drum. The drum receives power from a countershaft
through a pair of spur gears. A motor operating at 860 rpm delivers power to the countershaft through a
roller chain. The mechanical efficiency of the chain drive is 94 % and of the gears is 96 %. a) Determine the
Hp 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 speed
specified. d) Determine the transmitted torque on the countershaft, in in-lb.

24 teeth
124 teeth
Figure P1.
3
4
V = 270 fpm
42"
Belt Conveyor
Motor
A
-Drum (40-inch Diameter)
Spur Gear, 24 teeth
6" pitch Diameter
Roller Chain
Belt Conveyor
Sprocket
18 teeth
Sprocket
28" pitch diameter
Drum
(D = 40 inches)
Spur Gear
124 teeth
Countershaft

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