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
how degree of super heat reduces specific steam consumption

The 300 kg, 8-m-wide rectangular gate shown in the figure is hinged at B and leans against the floor at A making an angle of 60° with the horizontal. The gate is to be open from it

Do not round intermediate calculations, however for display purposes report intermediate steps rounded to four significant figures. Give your final answer(s) to three significant f

Three forces act on particle: Thr ee forces act on particle ' O ' as shown in the figure given below. Determine the value of ' P ' such that resultant of these three forces

Determine the angle of twist - solid steel shaft: A solid steel shaft 6 m long is fixed at each of the end. A torque of 3 kN-m is applied to the shaft at a section 2 m from on

how can i calculate tractive effort for jet ski to start move and how much power necessary ?

A shaft carries three pulleys A,B and C. the pulleys B and C being 1.2m and 2.1m from A. the pulleys are out of balance to the extent of 0.03, 0.05 and 0.04kg.m respectively and ar


Valve Clearance and Tappet Adjustment: Like all metal components the valve expands on heating. Hence the valve clearance is set so that on expansion there is room for the valve to

Describe carburetion. What are the basic different air-fuel mixture on which an engine can be operated ? Write a short note on sterling cycle. In an engine working on inlet pres