Design a muff coupling to connect two shafts. The power to be transmitted is 27kW at a shaft speed of 440 rpm. The shaft and the key are made of same material and the allowable shear and the crushing stresses are 37 & 79 N/mm2 respectively. Calculate

Design a muff coupling to connect two shafts. The power to be transmitted is 27kW at a shaft speed of 440 rpm. The shaft and the key are made of same material and the allowable shear and the crushing stresses are 37 & 79 N/mm2 respectively. Calculate

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

Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.

Question

Design a muff coupling to connect two
shafts. The power to be transmitted is 27KW
at a shaft speed of 440 rpm. The shaft and
the key are made of same material and the
allowable shear and the crushing stresses
are 37 & 79 N/mm2 respectively. Calculate
diameter of the shaft and other dimensions
of the coupling. Verify if the design of muff is
safe or not, when cast iron is used as the
material for muff with an allowable shear
stress of 14 MPa.

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