A belt drive consists of a flat belt stretched between two pulleys of equal diameter, 400mm, as shown in Figure Q1(a). The belt drive transmits a power of 250 W when the pulleys rotate at 150 rpm. The coefficient of friction between the belt and the pulley is 0.3. 400 mm Figure Q1(a) a) What is the value of the belt speed? b) What is the value of the effective tension transmitting power, T:-T2? c) What is the value of the ratio between the tight and slack tension, T1/T2? d) Use your answers to (b) and (c) to compute the individual values of T and T.
A belt drive consists of a flat belt stretched between two pulleys of equal diameter, 400mm, as shown in Figure Q1(a). The belt drive transmits a power of 250 W when the pulleys rotate at 150 rpm. The coefficient of friction between the belt and the pulley is 0.3. 400 mm Figure Q1(a) a) What is the value of the belt speed? b) What is the value of the effective tension transmitting power, T:-T2? c) What is the value of the ratio between the tight and slack tension, T1/T2? d) Use your answers to (b) and (c) to compute the individual values of T and T.
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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Transcribed Image Text:A belt drive consists of a flat belt stretched between two pulleys of equal diameter, 400mm,
as shown in Figure Q1(a). The belt drive transmits a power of 250 W when the pulleys
rotate at 150 rpm. The coefficient of friction between the belt and the pulley is 0.3.
400 mm
Figure Q1(a)
a) What is the value of the belt speed?
b) What is the value of the effective tension transmitting power, T1-T2?
c) What is the value of the ratio between the tight and slack tension, T1/T2?
d) Use your answers to (b) and (c) to compute the individual values of T1 and T2.
The belt has a density of 0.005 kg/cm3 and has a rectangular cross-section with
width 5 cm and thickness 0.8 cm. The belt's maximum allowed stress is 50 N/cm2.
e) Does the belt exceed its maximum allowed stress? Justify your answer.

Transcribed Image Text:e) Does the belt exceed its maximum allowed stress? Justify your answer.
An alternative configuration of the belt drive is shown in Figure Q1(b), where the belt
crosses itself between the two pulleys. The pulleys are moved closer together to allow
for the same length of belt to connect them in the new configuration. Assume that the
belt drive will operate below its maximum allowed stress in the new configuration.
f) If the belt speed remains the same as in part (a), will the power transmitted by the
belt increase, decrease, or remain the same after changing the belt configuration
from that in Figure Q1(a) to that in Figute Q1(b)? Briefly justify your answer.
Figure Q1(b)
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