PPT on shock absorber, types and application

1. SHOCK ABSORBER
-BY
AABID AHMED – 190021601001
GOKUL KUMAR – 190021601019
KINLUSH - 190021601024

2. • In real life, some sort of resistive/frictional force
is always present leading to a phenomenon
called Damping, where the amplitude of
oscillations will not be constant over time.
• With this dissipating forces present, the
oscillations are noted as damped harmonic
motion rather than simple harmonic motion,
where energy and amplitude are always constant.
• Hence, for damped harmonic motion, the
amplitude of oscillations will decrease over time.
• Damping is when the amplitude of oscillations
decrease because of dissipative forces.

3. WHAT DOES A SHOCK
ABSORBER DO?
• They limit the spring oscillations to smooth out
the vehicle’s ride.
• A shock absorber is nothing but a hydraulic
pump which absorbs the kinetic energy of
the suspension system and dissipation it
into the atmosphere as heat.
• Being a part of the suspension system, it
damps out the vibrations by providing
resistance towards the motion of the
springs and the wheels.
• Manufactured so as to meet the
rigidity and flexibility.
PURPOSE OF
SHOCK ABSORBER
• Providing better
comfort
• Ensures consistent
traction to the road
surface.
• Better steering
stability
• Improves handling of
the vehicle

5. • As the piston moves towards the base, the
compression valve opens in a controlled
manner, allowing the excess fluid to flow
to the reserve chamber.
• During the rebound stage, the piston rod
tries to restore its position against the
compressive energy .
• Thus, the rebound valve ensures this
happens in a controlled manner
• As a result, the previously displaced
fluid to the reserve chamber is pulled
back to the working chamber.
• Liquid Nitrogen is added to a
predetermined pressure in order to
prevent aeration and cavitation caused
at higher operating speeds
• Broken oil seals causes fluid leaks resulting
in foaming which could affect the
performance of the shock absorber

8. Hydraulic shock absorber monotube
in different operational situations:
• Drive slow or adjustments open
• Like "1", but extension
immediately after the
compression
• Drive fast adjustments or closed,
you can see the bubbles of
depression, which can lead to the
phenomenon of cavitation
• Like "3", but the extension
immediately after the
compression
MONO- TUBE SHOCK ABSORBER

9. •The Piston slides inside the cylinder. This piston is secured
to the piston rod which at its upper end has an eyes
welded to it with this eye and the outside part of the
piston rod is protected by a dust shield which is welded to
the fixing eyes.
TELESCOPIC SHOCK ABSORBER
• It consist of a cylinder to which head is welded.
The head is screwed into the top end of the outer
tube.
• To the bottom end of the outer tube is
welded pressed Steel cap and eye or ring. This
eye is connected to wheel axle.
•Any fluid scraped off by the gland packing passes down a
drain hole to the reservoir space between the cylinder and
outer tube.
•The Piston has two concentric rings of holes drilled
through it. The outer ring of hole is covered at the top by a
disc valve which is held down by a star shape disc spring.
•The inner ring hole is covered by disc valve from bottom
by the coil spring. There is a foot valve assembly at the
bottom of the cylinder. The foot valve assembly is similar
to that piston assembly, except that the lower disc valve
which covers the inner ring of holes is held up by a disc
valve spring instead of coil spring.
Both ends of the cylinder are completely filled by a
mixture of 60% transformer oil and 40% turbine oil and the
space between the tube and cylinder.

12. THANK YOU