Question

0.
Design a cast iron protective flange coupling to connect two shafts in order to transmit 1 W a 12
1.p.m. The following permissible stresses may be used :
Permissible shear stress for shaft, bolt and key material = 33 MPa
Permissible crushing stress for bolt and key material = 60 MPa
Permissible shear stress for the cast iron = 15 MPa
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Answer 1

Design a cast iron protective flange coupling to connect two shafts in order to transmit 7.5 kW at 720 r.p.m. The following permissible stresses may be used: Permissible shear stress for shaft, bolt and key material = 33 MPa, Permissible crushing stress for bolt and key material = 60 MPa, Permissible shear stress for the cast iron = 15 MPa 47.The shaft and flange of a marine engine are to be designed for flange coupling in which the flange is forged on the end of the shaft. The following particulars are to considered in the design Power of engine= 3MW Speed of engine= 100 rpm Permissible shear stress in bolt and shaft = 60 Mpa, No of bolts used=8 Pitch circle diameter of bolts = 1.6 x diameter of shaft. Find Diameter of shaft, diameter of bolts Thickness of flange, diameter of flange.