Find out the power - hollow shaft, Mechanical Engineering

Find out the power - hollow shaft:

A hollow shaft of internal diameter 400 mm & external diameter 450 mm is needed to transmit power at 120 rpm. Find out the power it may transmit, if the shear stress is not to exceed 50 N/mm2 & the maximum torque exceeds the mean by 30%.

Solution

do = 450 mm,  di = 400 mm,   N = 120 rpm

τmax = 50 N/mm2 = 50 × 106 N/m2

Tmax  = τmax  × Z P

625_Find out the power.png

=  (π /32 )(4504  - 4004 ) = 1.51 × 109 mm4

R = do /2 = 450 = 225 mm

Z P        = J/ R = 1.51 × 109 /225 mm3 = 6.7 × 10- 3  m3

τmax  = (50 × 10 ) (6.7 × 10) = 335 × 10  N-m

τmax  = 1.3 × T

⇒         335 × 103  = 1.3 T

∴          T = 258 × 103 N-m

∴          Power, P = 2π NT/60 = 2π × 120 × 258 × 103 /60

                         = 3242 × 103 watts = 3242 kW

Posted Date: 1/21/2013 4:30:13 AM | Location : United States







Related Discussions:- Find out the power - hollow shaft, Assignment Help, Ask Question on Find out the power - hollow shaft, Get Answer, Expert's Help, Find out the power - hollow shaft Discussions

Write discussion on Find out the power - hollow shaft
Your posts are moderated
Related Questions
Planning A New Airport: Elements of Airport Planning The elements of planning for a new airport are : (a)        Demand Forecast (b)       Site Selection (c)

what all are the application of superconductivity in daily life?


Q. Skid assemblies and modular structures? This specification describes parameters for the design, fabrication, materials and installation of the structural steel part of skid

Axi s of symmetry If in diagram half part of diagram is mirror image of next ½ part, then there is a symmetry in diagram. The axis at which symmetry is create, called as axis

Inlet and Exhaust Valves : Valves are commonly mushroom shaped poppet type. They are provided on the cylinder for regulation of the charge coming into the cylinder (inlet valve)

Q. Mechanical Data for Line Designation Tables? Line Designation Tables (LDT's) are initially generated by the Piping designers. Design conditions are inputed by the Process di

a couple can be balanced by a force equal to its magnitude?

Determine: Reaction forces at the supports The shear and moment diagrams The location and value of the maximum shear and moment The cross section is an angle section as given in

Determine the concurrent forces: Four coplanar concurrent forces act at point and keep it at rest. These are mention in Figure. Determine the forces P and Q. Solution