Design the elliptical cross-section of a belt pulley arm near the hub for the following specifications: The mean pulley diameter is (300 mm) and the (number of pulley arms are 4). The elliptical section has major axis twice the minor axis length. The tight and slack sides tension in the belt are (600 N and 200 N) respectively. Assume half number of arms transmit torque at any time and the load factor of 1.75 to account for dynamic effects on the pulley while transmitting torque. The permissible tensile stress for cast iron pulley material is 15 MPa. The pulley hub diameter is 60 mm.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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HOME WORK
Design the elliptical cross-section of a belt pulley arm near the hub for the
following specifications: The mean pulley diameter is (300 mm) and the
(number of pulley arms are 4). The elliptical section has major axis twice
the minor axis length. The tight and slack sides tension in the belt are (600
N and 200 N) respectively. Assume half number of arms transmit torque
at any time and the load factor of 1.75 to account for dynamic effects on
the pulley while transmitting torque. The permissible tensile stress for cast
iron pulley material is 15 MPa. The pulley hub diameter is 60 mm.
[Ans. a=40 mm, b₁= 20 mm]
Transcribed Image Text:• HOME WORK Design the elliptical cross-section of a belt pulley arm near the hub for the following specifications: The mean pulley diameter is (300 mm) and the (number of pulley arms are 4). The elliptical section has major axis twice the minor axis length. The tight and slack sides tension in the belt are (600 N and 200 N) respectively. Assume half number of arms transmit torque at any time and the load factor of 1.75 to account for dynamic effects on the pulley while transmitting torque. The permissible tensile stress for cast iron pulley material is 15 MPa. The pulley hub diameter is 60 mm. [Ans. a=40 mm, b₁= 20 mm]
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