Answered: A Pully drive system used in washing…

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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Question

A Pully drive system used in washing machine is designed based on flat belt as in Figure.1/a. The tension in the
pully is 140 ? when it is stationary. The geometry specifications (Diameters and lap angle) are shown in
Figure.2. The speed of rotation N is 1700 rpm and the coefficients of friction is ? = 0.25

1. Find the initial tension in each side
2. Find the power transmitted on the smaller wheel
3. Discuss the initial tension requirements/calculations to convert the system to the operation of a Vbelt drive, if the included angle of V-section ? = 18.5
?
(assume ? = 0.25) , in your discussion
compare the critical tension ration for both type and the transmitted power values

Project 1:
A Pully drive system used in washing machine is designed based on flat belt as in Figure.1/a. The tension in the
pully is 140 N when it is stationary. The geometry specifications (Diameters and lap angle) are shown in
Figure.2. The speed of rotation N is 1700 rpm and the coefficients of friction is μ = 0.25
Flat Belt
(a)
(b)
Figure.1: Flat vs V-belt pully drive section
D₂-240 mm
0-160
V-Belt
D-480 mm

Figure.2: Pully drive system specifications
1. Find the initial tension in each side
2. Find the power transmitted on the smaller wheel
3.
Discuss the initial tension requirements/calculations to convert the system to the operation of a V-
belt drive, if the included angle of V-section ß = 18.5º (assume μ = 0.25), in your discussion
compare the critical tension ration for both type and the transmitted power values.

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