Tribological Relationship for Sintered Bearing Using Taguchi Technique (original) (raw)
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Journal of the Balkan Tribological Association
In this study, a new test rig was designed to measure the tribological characteristics such as friction force and wear of base sintered bronze journal bearings manufactured with powder metallurgy (P/M), and manufactured. P/M base sintered bronze bearings are commercially available and they contain elemental copper and tin powders. Composition of powders is 90% Cu+10% Sn with 45m powder diameter. The tests could be carried out under statically and dynamically loading conditions. Pressed and sintered test bearings were immersed into oil during the experiments. The magnitude of load is adjusted according to the eccentricity of the cam where loading components are provided. Related to the strain gauges forces, Wheatstone bridge formed on the measurement cycle gives beams proportional to the forces. Then, computer recorded these signals as friction forces. In this study base oil and 2 fully formulated commercial oil(SAE 20W50) were studied in order to investigate for the tribological pr...
Wear, 1985
Experiments were conducted on bronze sintered bearings to determine the effect of bearing wall thickness and bearing length on the coefficient of friction. Parameters such as the radial clearance, the surface roughness of the shaft and the lubricating oil were kept constant in all the test bearings during the experiments. It was found that the coefficient of friction increases with the wall thickness and decreases with an increase in bearing length. It is felt that the above result will be useful for the users of sintered bearings in making a judicious selection of the wall thickness and the length of the bearing such that the selection results in a larger bearing metal volume to store more lubricating oil giving a longer life and a reduced coefficient of friction.
Investigation of tribological and mechanical properties of metal bearings
Bulletin of Materials Science, 2009
Copper, aluminum and tin-lead based alloys are widely used as journal bearing materials in tribological applications. Bronze and brass are widely used as journal bearing materials for copper based alloys. Zamacs find applications as journal bearing materials for zinc based alloys, while duralumines are chosen as journal bearing materials for aluminum based alloys. In addition, white metals are widely used as journal bearing materials for tin-lead based alloys. These alloys ensure properties expected from journal bearings. In this study, tribological and mechanical properties of these journal bearings manufactured by metals were investigated. SAE 1050 steel shaft was used as counter abrader. Experiments were carried out in every 30 min for a total of 150 min by using radial journal bearing wear test rig.
IJRASET, 2021
Proper lubrication of mechanical components is very important for the reliable efficiency and useful life. The working temperature of the components can affect the lubricating oil and can degrade the lubricating characteristics of oil. This paper presents the experimental investigation on tribological behaviour of journal bearing material. Two types of additives are used in lubricating oil i.e., powder and granular types of additives. The investigation is carried out on pin-on-disc apparatus to determine the wear and coefficient of friction. The statistical analysis is performed using design of experiments and Taguchi robust design to determine the optimum parameters of lubricating additives. It is found that for constant speed of 400 rpm with 5% concentration with varying size the granular lubrication have lower values than powder lubrication for all load conditions
Wear And Friction Analysis Of Sintered Metal Powder Self Lubricating Bush Bearing
2014
Powder metallurgy (P/M) is the only economic way to<br> produce porous parts/products. P/M can produce near net shape parts<br> hence reduces wastage of raw material and energy, avoids various<br> machining operations. The most vital use of P/M is in production of<br> metallic filters and self lubricating bush bearings and siding surfaces.<br> The porosity of the part can be controlled by varying compaction<br> pressure, sintering temperature and composition of metal powder<br> mix. The present work is aimed for experimental analysis of friction<br> and wear properties of self lubricating copper and tin bush bearing.<br> Experimental results confirm that wear rate of sintered component<br> is lesser for components having 10% tin by weight percentage. Wear<br> rate increases for high tin percentage (experimented for 20% tin and<br> 30% tin) at same sintering temperature. Experimental results also<br> confir...
Determination of friction coefficient in journal bearings
Materials & Design, 2007
Knowing friction coefficient is important for the determination of wear loss conditions at journal bearings. Tribological events that influence wear and its variations effect experimental results. In this study, friction coefficient as example at bronze radial bearings has been determined by a new approach. In experiments, friction effects of bearings have been examined at dry and lubricated conditions and at different loads and velocities.
Journal of Central South University, 2020
Chrome steels are used in bearings since they possess high strength and wear resistance. However, when those parts are in service, failure happens due to sliding friction before the lifetime. To improve the durability of the American Iron and Steel Institute (AISI) 52100 chromium steel, in this work, the effect of laser surface texturing (LST) was analyzed. With the different patterns of circle and ellipse comparing with the untextured samples, the wear behavior was investigated using the pin-on-disc tribometer. The lubricant used for wear analysis is semisolid lithium grease National Lubricating Grease Institute lubricant (SKF NLGI-3). Sliding wear analysis was conducted at different loads of 10 N, 30 N and 50 N for the sliding speed of 750 r/min and 1400 r/min. The wear morphology was analyzed using a scanning electron microscope(SEM). The roughness of the samples was found using a white light interferometer. The effect of different patterns like circle and ellipse, alter the friction and wear properties of chromium alloy was observed compared with the untextured samples. LST shows considerable reduction in friction and wear for ellipsoidal pattern compared with the circular pattern because of wear debris and lubricant getting trapped.
Mechanical-Tribological Solutions / links resulted from Bearing Wear Tests
RWTH Aachen University,Institute for Machine Elements and Systems Engineering, Aachen, DE, 2024
The Tribology Team in Turbo Technologyhas evaluated the requirements of customers , and realized this study. This work presents new study-work , to undrestand circular and/or complex sliding of the pin/ball (shaft) into cylinder (bearing). The purpose of this study is to show the mechanical-tribological links resulted from bearing wear tests for the next applications.. We shall present the main eight suppliers and their fifty-nine materials into format sent by customer. We shall present main mechanical-tribological links for representative materials used in bearing wear tests..