this presentation involves about different types of magnetic shock absorbers, working, advantages and limitations and different types of magnets used in making of a magnetic shock absorber.

1. NALLA MALLA REDDY ENGINEERING COLLEGE
A Technical Seminar on
MAGNETIC SHOCK ABSORBER
Presented by
M.RAKESHKUMAR
15B61A0350

2. CONTENTS
• Introduction
• Working Principle
• Classification of Shock Absorbers
• Types of Magnets used in Shock Absorbers
• Advantages
• Disadvantages
• Conclusion

3. INTRODUCTION
• Shock absorber is a key component to
all automobiles, which controls
vehicles suspension movement to
provide a comfortable ride.
• Shock absorber is a mechanical or
hydraulic device designed to absorb
the damp shock impulses.
• It does this by converting the kinetic
energy of the shock into another form
of energy which is then dissipated.
Most shock absorbers are in a form of
dashpot (a damper which resists
motion via viscous friction).

4. WORKING PRINCIPLE
• Magnetic shock absorber works on the basic principle of magnet that
“opposite poles attract each other and same pole repels each other”.
• Two magnets are mounted in this way that one is mounted below and
other is on upper side.
• Poles of these magnets are same at inner side so that they are repulsed
from each other and space is made between them due to this, When the
vehicle is running on the bump or the muddy road then the space
between two magnets is reduced and then shocks and variations
present in the vehicle absorbed by repulsion property of the magnet.

5. CLASSIFICATION OF SHOCK ABSORBERS
• Classification by Operation
a) Single action shock absorber
b) Multiple action shock absorber
• Classification by Construction
a) Mono tube shock absorber
b) Twin tube shock absorber
• Classification by working medium
a) Hydraulic shock absorber
b) Gas filled shock absorber

6. TYPE OF MAGNETS USED
• Alnico
• Rare earth magnets
• Samarium cobalt
• Polymer based magnets
• Neodymium magnets

7. Alnico Samarium cobalt Neodymium magnets (10x2)
Neodymium magnets
(5x1)
Neodymium magnets
(6x2)
Neodymium magnets ring
type (8x5x3)

8. ADVANTAGES
• Magnetic shock absorber will reduce the problems associated in the
spring shock absorb due to friction and other factors.
• This will also reduce the maintenance cost as it does not need
repairing.
• No leakage related issues like hydraulic shock absorber.
• Load carrying capacity of magnetic shock absorber is more.
• Improving no. of magnets that to make these magnetic shock
absorbers even better, a chain of more than two magnets can be used
to tolerate the shocks or weight and make the vehicle comfortable.
• Noiseless operation during functioning.
• Magnet can be re-magnetized to its originally strength.
• It improves the ride quality.

9. DISADVANTAGES
• Repulsive force of power magnet is quite uncontrollable.
• Cost of power magnet is high.
• It requires nonferrous material for handling purpose.
• While assembling the power magnets it offers difficulty to worker.
• In case load exceeds than permissible value of load the magnet may collide each
other.
• When both the magnets are in contact will reduce its magnetic strength.
• The magnetic power varies according to the earth magnetic field. So, it cannot be
used in Polar Regions.

10. CONCLUSION
• Now days the conventional shock absorbers are facing the problem of
oil leakage and the shock absorber loses its capacity to absorb the road
shocks and bumps. So, to overcome this difficulty of oil leakage
problem, we can remove the oil from the conventional shock absorbers
and replace it from permanent power magnets and also this have no
leakage.
• As there is no direct contact between the two magnets hence there is
no wear and tear of the magnets and therefore the life of the magnetic
shock absorber is more comparatively conventional shock absorber.

11. THANK YOU