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SHOCK ABSORBER.pptx
- 1. SHOCK ABSORBER -BY AABID AHMED– 190021601001 GOKUL KUMAR – 190021601019 KINLUSH - 190021601024
- 2. • In reallife, 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 ASHOCK 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 thepiston 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 absorbermonotube 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 slidesinside 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.
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