Design and draw a cast iron flange coupling for a mild steel shaft transmitting 80 kW at rpm with the following specifications: Q1: Allowable shear stress in the shaft = 400 MPa Permissible angle of twist < 1° in a length of 20 diameters Allowable shear stress in the coupling bolts = 30 MPa Rigidity modulus of shaft materials = 85 GPa Allowable shear stress for hub material = 15 MPa You may adopt, width of key = 25 mm, thickness of key = 14 mm You may also consider that the shaft and key are made of the same material. Four number of bolts are to be used in the coupling. Find out the diameter of the shaft required main dimensions of the flanges and the key. Adopt suitable dimensions. Draw a neat sketch for the flange coupling with the designed dimensions.

Design and draw a cast iron flange coupling for a mild steel shaft transmitting 80 kW at rpm with the following specifications: Q1: Allowable shear stress in the shaft = 400 MPa Permissible angle of twist < 1° in a length of 20 diameters Allowable shear stress in the coupling bolts = 30 MPa Rigidity modulus of shaft materials = 85 GPa Allowable shear stress for hub material = 15 MPa You may adopt, width of key = 25 mm, thickness of key = 14 mm You may also consider that the shaft and key are made of the same material. Four number of bolts are to be used in the coupling. Find out the diameter of the shaft required main dimensions of the flanges and the key. Adopt suitable dimensions. Draw a neat sketch for the flange coupling with the designed dimensions.

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

Q1:
Design and draw a cast iron flange coupling for a mild steel shaft transmitting 80 kW at 220
rpm with the following specifications:
Allowable shear stress in the shaft = 400 MPa
Permissible angle of twist < 1° in a length of 20 diameters
Allowable shear stress in the coupling bolts 30 MPa
Rigidity modulus of shaft materials = 85 GPa
Allowable shear stress for hub material = 15 MPa
You may adopt, width of key = 25 mm, thickness of key = 14 mm
You may also consider that the shaft and key are made of the same material.
Four number of bolts are to be used in the coupling. Find out the diameter of the shaft required and
main dimensions of the flanges and the key. Adopt suitable dimensions.
Draw a neat sketch for the flange coupling with the designed dimensions.

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