Q/The layout of a crossed leatherbelt drive is shown in Fig. below. Thebelt, transmits 7.5 kW and operates ata velocity of 13 m/s approximately.The coefficient of friction is 0.3 andthe permissible tensile stress for thebelt material is 1.75 N/mm2. Calculate(i) The diameters of pulleys; (ii) Thelength of the belt and (iii) Belttensions on the tight and slack sides.500 грm1000 грmd1d2-1500 mm-

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Answered: (i) The diameters of pulleys; (ii) The…

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(i) The diameters of pulleys; (ii) The length of the belt and (iii) Belt tensions on the tight and slack sides.

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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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

Q/The layout of a crossed leather
belt drive is shown in Fig. below. The
belt, transmits 7.5 kW and operates at
a velocity of 13 m/s approximately.
The coefficient of friction is 0.3 and
the permissible tensile stress for the
belt material is 1.75 N/mm2. Calculate
(i) The diameters of pulleys; (ii) The
length of the belt and (iii) Belt
tensions on the tight and slack sides.
500 грm
1000 грm
d1
d2
-1500 mm-

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d) A leather round belt transmit power from small pulley rotates 1200 rpm. The diameter of small pulley is one third of the diameter big pulley. The center distance between the pulleys is twice the diameter of big pulley. The stresses in the belt should not exceed 2 MPa and belt density is 950 kg/m?. Due to the friction of rotation, the ratio tension on the tight side to the slack side is 2:1 and coefficient of friction is 0.35. For design requirement, the ratio of diameter leather round belt to diameter of small pulley is 1:18. Determine, i) Contact angle. i) Diameter belt. iii) Belt tension. iv) Torque.
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