## Find out the power - hollow shaft, Mechanical Engineering

Assignment Help:

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

=  (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

#### PUMP, We have a reciprocating compressor operating at 800 rpm. Suction pre...

We have a reciprocating compressor operating at 800 rpm. Suction pressure and discharge pressure are held constant by other systems that have nothing to do with the compressor. W

#### Features of the scheme entrepreneurship development, Features of the Schem:...

Features of the Schem:  Features of the scheme are as follows : DIC is the primary registering centre. Registration is voluntary and not compulsory. Two types of

how it works

#### Transient analysis, please share some basic theory material

please share some basic theory material

#### Newton law of cooling, Ask question Briefly explain how, using Newton’s L...

Ask question Briefly explain how, using Newton’s Law of cooling, you may write the temperature of a cooling body as an exponential function of time#Minimum 100 words accepted#

#### Calculate the magnitudes of the masses, A rotor has the given properties : ...

A rotor has the given properties : If the shaft is balanced by two counter masses located at 100 mm radii and revolving in planes midway of plan 1 and 2 and midway of 3 and

#### Determine the springs needed to absorb the energy, Determine the springs ne...

Determine the springs needed to absorb the energy: A vehicle weighing 28 kN and running at 2.5 m/sec is to be brought to rest by a buffer springs. Determine the number of spri

#### Calculate sif of crack - beam, Calculate sif of crack - beam: An edge ...

Calculate sif of crack - beam: An edge cracked beam carries crack in its central plane whose lengths is 5 mm. A load of 1000 N is applied opposite to crack so that crack would

#### Surveying.., what is the two purposes of surveying

what is the two purposes of surveying

#### Define milling cutter - geometry of cutting tool, Define Milling Cutter - G...

Define Milling Cutter - Geometry of Cutting Tool Out of large verity of milling cutter used in milling cutter used in milling practice, two types of cutter chosen to describe t