You wont need a shock leader as long as you dont use a sinker larger than 4 ounce. Shock absorber is an important part of automotive suspension system which has an effect on ride characteristics such as ride comfort and. Jun 22, 2016 concept of testing suspension of a shock absorber, by using cam. Nasledne jsou vybrany varianty, ktere nejlepe splnuji pozadavky na jednoduchost, ekonomicnost a vyrobni nenarocnost. For the measurement of the transmissibility of the shock absorber a test rig is designed and developed. Dynamic measurement system for interchangeable shock absorber test rig m. Shock absorber test rig defective shock absorbers impair the cars handling, unevenness on the road starts to be felt more strongly and the stability of the car at a high speed decreases. Zainudin abstract an automotive suspension system is meant to provide safety and comfort for the occupants.
This test rig is design for interchangeable shock absorber testing. Experimental analysis and heat transfer study of damping. The machine consists of motor, clutch break unit, gear box with appropriate gear ratio to obtain desired speed, eccentric. In an attempt to prove the concept, a well known control. In summary, a new quartercar test rig has been designed and built. The purpose of this project is to perform endurance test on shock absorber as per indian standard. Design and transmissibility investigation of shock absorber test rig rutuja deshmukh1, prof. Pdf shock absorber is a very key element in an automobile system, which is also an example of under damped vibration system. Stroke length which is to be applied on shock absorber. Find details of companies offering shock absorber testing machine at best price. Design of shock absorber test rig for measurement and. Equipped with tearwebbing inside a pouch that opens on each end, the absorber is protected from abrasion, while allowing. Angular velocity radss f propelling force n c cycles per hour 1hr p motor power kw 3 st stall torque factor normally 2.
Suspension strut bearings design trend encapsulated suspension strut bearing in the development of suspension struts, there is a tendency toward the use of shockabsorber springs with larger diameters. It is most beneficial when drilling in hard rock, broken formations, and intermittent hard and soft streaks. Nonlinear dynamic analysis of a shock absorber hydraulic. Check the shock absorbers visually, in motion, under load, and also in the service center on special equipment. As a result, fullcomplement bearings with small pitch diameter are being replaced by larger cageguided suspension strut bearings figure 7. A universal suspension test rig for electrohydraulic active. Study on dynamic characteristics of automotive shock absorber.
This model can then be applied to experimental design. Our systems can deliver the performance and accuracy required for even the most demanding applications, whether for single shock absorber, macpherson strut assembly or multidamper setup. Endurance test rigs bearing test rigs manufacturer from pune. In most shock absorbers, energy is converted to heat. Concept of testing suspension of a shock absorber, by using cam. As conclusion the shock absorber test rig is capable to perform endurance test on different types of shock absorber.
It reduces the amplitude of disturbances leading to increase in comfort and improved ride quality. Shock absorber is a very key element in an automobile system, which is also an example of under damped vibration system. Design of shock absorber test rig is done in solid work 2014 edition software. Performance evaluation of shock absorber acting as a. Both the force applied to the shock absorber and the displacement stroke of the shock absorber is measured using load cell and lvdt. Pdf design of shock absorber test rig using mechanical. Amol kokare3 1, 2, 3 department of mechanical engineering 1, 3 jscoe, hadapsar, pune 2 aissms coe, pune abstract shock absorber is very important term in automobile industries. Shock absorberdamper durabilitydamping force test system. Simulink model, suspension test, rig introduction the primary function of the suspension system is in a car to isolate the road excitations experienced by the wheels from being. Most of shock absorber contains the air gap inside the shock absorber between internal cylinder and outer body, air gap has lower heat transfer rate, and.
Shock sub impact and vibration reduction tool schlumberger. Design of shock absorber test rig using mechanical exciter to determine transmissibility and natural frequency. Dynamic behaviors of the absorber are studied by computer simulation and experimental testing and are validated with matlab results. This paper presents performance characteristics of the shock absorbers under real conditions. They are used for the driving comfort and driving safety. Best shock absorber test rig defective shock absorbers impair the cars handling, unevenness on the road starts to be felt more strongly and the stability of the car at a high speed decreases. Buoyancy of the fluid into which the tubing is run. Coiled tubing damage, fatigue, failure tension is the major stress factor once the coiled tubing is in the well. The shock absorber test rig can be used to do dynamic tests on semiactive suspension components.
Shock absorber modelling chalmers publication library cpl. The machine consists of motor, clutch break unit, gear box with appropriate gear ratio to obtain desired speed, eccentric mechanism, reciprocating platform, pneumatic quick clamping system. Dynamic measurement system for interchangeable shock. Typically, the forces involved are150 200 lbs at a rotational speed of 150 degrees per second for normal operation, and 70lbs at degrees per second, for the leak test.
Then same excitations are given to suspension test rig. Performance evaluation of shock absorber acting as a single. This is a preliminary report covering only one test load and three different shock absorber conditions. The complete shock absorber test rig is system consist of a few important parts which are. Typically, the forces involved are150 200 lbs at a rotational speed of 150 degrees per second for normal. An experiment was conducted to identify the stiffness and damping parameter for 850 cc and 1600 cc shock absorber. Rtds are temperature sensors that contain a sensing element. These values are then actually verified on suspension test rig. The shock absorber is a suspension system which designed mechanically to control shock impulse and dissipate kinetic energy. The introduction deals with the basic description of particular dampers. Autotest shock absorber dynamic testing shock absorber.
The damper displacement can be prescribed and the damper force can be measured. The upper vertical is the shock absorber while the lower connection to the base structure is the pneumatic cylinder. The use of simulation to expedite experimental investigations. In case of visual diagnostics, it is necessary to inspect the shock absorbers. Rig t057 hydraulic power high frequency automotivemotocycle shock absorberdamper durabilitydamping force test system for showa corporation loading force. The test rig can be useful for validating the real vehicle test with the laboratory test. Abstractshock absorber is very important term in automobile industries. Basically, this project involves designing the test rig for testing and indicating the condition of shock absorber in automotive vehicle.
Attempts have been made by 1 nikhil kothawade and others to measure and analyzer the transmissibility of a shock absorber for which a shock absorber test rig is designed and developed. In the shock absorber model, our interest lies in computing the force transmitted from the rod to the car body. Shock absorber ppt free download as powerpoint presentation. The timing of the ntc project, the delivery schedule of the ntcs. Therefore, it can be used to test the shock absorber according to. Wales was made conditional on such a test being developed australia department of transport and regional services, 2005a, 2005b. The resulting model can then be coupled with shock absorber models to simulate how the vehicle response changes with shock absorber selection. Pdf design of shock absorber test rig using mechanical exciter to. The system is capable for 850cc and l 600cc shock absorber interchangeable. Transmissibility is a measure of effectiveness of the vibration isolating material. This teat rig is designed to check the shock absorber on line before sealing. Simulation study was performed utilizing the cosmos motion software.
Based on the analysis procedure as outlined in this chapter, algorithms were developed to determine the required stroke and piston length to meet the given design conditions, as well as the energy absorption capacity of the shock absorber. Shock absorber rig eindhoven university of technology. This test rig integrated with the computer systems to record the. A universal suspension test rig for electrohydraulic. Design and development of quarter car suspension test rig. At various loads and speeds combinations the readings on the test rig is taken with the help of bar. Why i dont use a shock leader anymore teach me surf fishing. The final position of the roller in relation to the hv wheel under test21. This shock absorber test rig is a rigid structure with two main components connected vertical. Study on dynamic characteristics of automotive shock. The upper and lower component is divided by the middle plate. Figure 11 shock absorber simulation test rig and simplified shock absorber a fomula 1 motor cycle front shock absorber was initially mathematically modelled and using a motor test rig the objective was to force the motor to perform as a passive shock absorber in other words the electrical motor in the test ng responds to. The national transport commission ntc is the project manager for that development. Pneumatic and hydraulic shock absorbers are used in conjunction with cushions and springs.
Suspension strut bearings design trend encapsulated suspension strut bearing in the development of suspension struts, there is a tendency toward the use of shock absorber springs with larger diameters. With the shock absorber rod either fully in or out apply a linear load to the piston against the end cap of the test sample. Design and transmissibility investigation of shock. Test rigs,automotive test rigs manufacturer,auto test rigs. Effectiveness of the vibration absorber can be measured by transmissibility. The shock absorber testing rig estimates that how much force that shock absorber absorbs and how much motion it transmits. The test rig is designed and built for testing shock absorber in the area of dynamic, vibration and displacement measurement. Passive shock absorber is commonly used on vehicle which functions by using the principle of fluid frictional effects abdullah et al. It has been demonstrated that it is the main transfer path for the studied structureborne noise in the shock absorber. Shock absorber test rig is a shock simulation machine that generates motion which are applied to the shock absorber to test it for shock absorbing capacity. Modelling, testing and analysis of a regenerative hydraulic shock. Anyone who wants to reliably protect the end positions of rack operating equipment, conveyor and crane systems, heavy duty applications and test benches chooses these safety shock absorbers from ace absorber stroke.
This mechanism converts rotary motion of the circulating disc into the linear motion of the shock absorber. Our systems can deliver the performance and accuracy required for even the most demanding applications, whether for single shockabsorber. Absorbica is a compact energy absorber, for use in combination with a jane lanyard to make a fall arrest lanyard. Load can be controlled and monitored throughout each test. The rod and piston are rigidly connected and will be assumed as just a single rigid part with mass m t. Dynamic measurement system for interchangeable shock absorber. Keywords damping characteristics, quarter car model, shock absorber test rig, universal.
Rtd sensor resistance temperature detector in order to estimate the absolute temperature of shock absorber rtd resistant temperature detection is used and brazed on the surface of shock absorber to measure surface temperature. The objective is to design and develop a quarter car suspension test rig model and to perform its simulation. Request pdf on jan 1, 20, lm jugulkar and others published design and development of shock absorber test rig find, read and cite all. This test rig integrated with the computer systems to record the signal. Leakage test rig for fuel tanks of cars, two wheelers, tractors water immersion method leakage test rig for plastic fuel tank, oil tank, washer wind shield etc. Tension, or hanging weight, occurs from the point of suspension, the chains, to the bottom of the string. Testing of a lever arm shock absorber about lever arm shocks. Design and transmissibility investigation of shock absorber. Hence we conducted study and perform endurance test on shock absorber. The analysis is done by considering loads, bike weight, single person an d 2 persons. And for measurement of transmissibility shock absorber test rig is designed and developed. A shock absorber can be vertically clamped in the test rig. The bottom of the shock absorber is attached to a movable cylinder, which exerts a force on the damper, causing the latter to compressextend.
A shock absorber model for structureborne noise analyses. This bachelor thesis is focused on the reconstruction of shock absorber test rig which is placed in the laboratory of machine and industrial design. Both the force applied to the shock absorber and the displacement stroke of the shock absorber is measured using load cell and lvdt displacement transducer. Any frequency within the equipments capability can be used to verify the durability of the rebound bumper. Concept of shock absorber test rig and approaching. Jul 05, 2018 rig t057 hydraulic power high frequency automotivemotocycle shock absorberdamper durabilitydamping force test system for showa corporation loading force.