Performance Evaluation of A Hydrodynamic Journal Bearing using Nano Ferro Fluid Lubricants with Varying Concentration of Iron Oxide Nanoparticle Additives (Fe3O4)

International Journal of Mechanical Engineering

© 2023 by SSRG - IJME Journal

Volume 10 Issue 8

Year of Publication : 2023

Authors : B. Vijaya Krishna, N. Seetharamaiah, L. Siva Rama Krishna

10.14445/23488360/IJME-V10I8P106

How to Cite?

B. Vijaya Krishna, N. Seetharamaiah, L. Siva Rama Krishna, "Performance Evaluation of A Hydrodynamic Journal Bearing using Nano Ferro Fluid Lubricants with Varying Concentration of Iron Oxide Nanoparticle Additives (Fe3O4)," SSRG International Journal of Mechanical Engineering, vol. 10,  no. 8, pp. 60-74, 2023. Crossref, https://doi.org/10.14445/23488360/IJME-V10I8P106

Abstract:

Hydrodynamic journal bearings are essential for boosting any machine’s dependability. When the interplay of geometry, surface motion, and fluid viscosity culminates in generating adequate fluid pressure to uphold the applied load, it gives rise to the formation of a hydrodynamic film. The additional pressure pushes the surfaces apart, preventing them from making contact. This phenomenon is known as hydrodynamic lift. Hydrodynamic lift supports the load on hydrodynamic bearings. Hydrodynamic journal bearings operate within a lubricated environment, where lubrication primarily aims to mitigate friction, wear, and heat generation among machine components undergoing relative motion. Therefore, advancements in lubrication techniques play a pivotal role in profoundly enhancing the effectiveness of these bearings. Modifications to oil lubrication properties are used to monitor bearing behavior. Variations in lubricant properties have a significant impact on how well a bearing works. In the present experimental investigations, the effects of the Nano Ferro particles on SAE 30 oil were examined. Experiments were conducted on a Hydrodynamic Journal bearing Test rig using Nano Ferro Fluid Lubricants. Nano Ferro Lubricants are made by altering the amounts of lubricant additives in concentrations such as 15%, 20%, and 25% in Castrol SAE 30 oil. The viscosity of the lubricating oil increased by adding nanoparticles, which improves the journal bearing’s performance characteristics, such as heat absorption and pressure reduction capacity. With the aid of a sophisticated mechanical agitator, nanoparticles utilized for work are combined with base oil in volume fractions of 15%, 20%, and 25%. Experimental research on pressure dissemination, load supporting capacity, bearing characteristic number, friction coefficient, Sommerfeld number, and heat generation is done using a hydrodynamic journal bearing test rig,500,600 and 700 rpm are used to assess a bearing’s performance along with 100 150 and 200 N of load. The results show that adding Nano Ferro Particles (Fe3O4) as lubricant additives increases the maximum pressure absorption capacity and load carrying capacity of journal bearings while decreasing bearing characteristic number, coefficient friction, Sommerfeld number, and heat generation when compared to base oil without nanoparticle additives.

Keywords:

Design parameters, Journal bearing, Lubricant additives, Nano ferro fluids, Volume concertation.

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