Find speed of dynamo shaft, Mechanical Engineering

Find speed of dynamo shaft:

Q: With the help of belt an engine running at 200rpm drives line shaft. The Diameter of the pulley on engine is 80cm and the diameter of the pulley on line shaft is 40cm. A 100cm diameter pulley on line shaft drives 20cm diameter pulley keyed to dynamo shaft. Find speed of dynamo shaft when: (1) There is no slip (2) There is a slip of 2.5 percent at each drive.

1436_Find speed of dynamo shaft.png

Sol:

Diameter of driver pulley (D1) = 80cm 

Diameter of follower pulley (D2) = 40cm
Diameter of driver pulley (D3) = 100cm
Diameter of follower pulley (D4) = 20cm

Slip on each drive, s1  = s2  = 2.5

Let N4 = Speed of dynamo shaft

(i) When there is no slip

By using equation

N4/N1  = (D1.D3)/(D2.D4)

N4  = N1  X (D1.D3)/(D2.D4) = [(80 X 100) X 200]/(40 X 20)

N4  = 2000RPM                                                            .......ANS

(ii) When there is slip of 2.5 percent at each drive

In this case we will have equation of:

N4/N1  = [(D1.D3)/(D2.D4)][1-s1/100][1-s2/100] By putting the values, we get

1298_Find speed of dynamo shaft1.png

 

Posted Date: 10/18/2012 3:14:06 AM | Location : United States







Related Discussions:- Find speed of dynamo shaft, Assignment Help, Ask Question on Find speed of dynamo shaft, Get Answer, Expert's Help, Find speed of dynamo shaft Discussions

Write discussion on Find speed of dynamo shaft
Your posts are moderated
Related Questions
How to determine Forces and Torque of slider crank mechanism?

Skeleton pattern A skeleton of the pattern made of strips of wood is used for building the final pattern by packing sand around the skeleton. After packing the sand, the desire

Determine distribution of shear force, bending moment and stress due to bending in the simply supported beam shown in the figure below, the beam self-weight is included in the unif


a) Draw a diagram of a simple carburettor and briefly explain its function. b) What are the basic characteristics of fuels for CI engines.

Determine the change in diameter: A thin spherical shell of 1.8 m diameter is 10 mm thick. This is filled with a liquid so that the internal pressure is 1 N/mm 2 . Determine t

An unsymmetrical I-Section as shown in figure below. If maximum bending stress is not extend more than 40MPa in the section than find out the moment which it can bear

Find out Deflection under the load: A beam of span 4 m is subject to a point load of 20 kN at 1 m from the left support and a Udl of 10 kN/m over a length of 2 m from the righ

Develop a computer program that can be used for internal flow analysis in SI units. The program should be able to: ? Get the required input data from the user ? Decide the flow ty

A large hydraulic cylinder is to be treated using autofrettage, taking 80% of the wall thickness into the plastic range. The external diameter of the vessel is 200mm and the inter