Effect of Using Nano Lubricant Containing TiO2 Particles on the Performance of Noncircular Two Lobe Journal Bearings

Authors

1 yazd university

2 Department of Mechanical Engineering Ardakan University

3 Mechanical deptt. , faculty of engineering , Yazd University, Yazd, Iran

4 Meybod University

Abstract

Development of nanotechnology and related sciences in the field of lubrication has led to applying nano particles in combination of the common lubricants as one of the most new solutions proposed by the tribology researchers to improve the performance of this type of support systems. In this study, the effect of TiO2 nano particles concentration combined with the base SAE30 oil on the steady state and dynamic stability performance of hydrodynamic two lobe journal bearings is investigated. For this purpose, after modifying the governing Reynolds equation of hydrodynamic lubrication using nano fluid theory and assuming the harmonic limit cycle oscillation of the rotor center around the static equilibrium point based on the linear dynamic model, the stability performance of two lobe bearings are analyzed. Finally, the static and dynamic stability characteristics for different concentration of the nano particle according to the bearing non circularity are obtained using the finite element method (FEM). The results show that the static and stability performance parameters of the non circular two lobe bearings, including the load carrying capacity, coefficient of friction, critical mass of the rotor and the whirl frequency ratio improve by increasing the concentration of TiO2 nano particles added to the base oil, especially for solid volume fraction less than %0.02 and the magnitude of performance variations is also amplified by reducing the amount of bearings non circularity.

Keywords

Main Subjects

References

  • Pinkus O (1956) Analysis of elliptical bearings. Trans of ASME, 78 (1): 965-973.
  • Malik M (1983)A comparative study of some two-lobed journal bearing configurations. ASLE Trans 26 (1): 118-124.
  • Mehrjardi MZ, Rahmatabadi AD, Meybodi RR (2016) A study on the stability performance of noncircular lobed journal bearings with micropolar lubricant. Proc of the Ins of Mech Eng, Part J: J of Eng Tribol 230 (1): 14-30.
  • Dwivedi VK. Pathak P (2019) Effect of axial groove location, length & width ratio on the bearing properties and stability. J of Comput and Applied Research in Mech Eng 10(2): 525-537.
  • Feng H, Jiang S and Ji A (2019) Investigations of the static and dynamic characteristics of water-lubricated journal bearing considering turbulent, thermohydrodynamic and misaligned effects. Tribol Int 130(2): 245-260.
  • Zare Mehrjardi M (2020) Dynamic stability analysis of noncircular hydrodynamic two-lobe journal bearings with couple stress lubricant regime. Proc of the Ins of Mech Eng, Part J: J of Eng Tribol 235(6): 1150-1167.
  • Abdou KM. Saber E. (2020) Effect of rotor misalignment on stability of journal bearings with finite width. Alexandria Eng J, 59(7):3407-3417.
  • Shenoy BS, Binu KG, Pai R, Rao DS, Pai RS, (2012) Effect of nanoparticles additives on the performance of an externally adjustable fluid film bearing. Tribol Int 45(1): 38-42.
  • Binu KG, Shenoy BS, Rao DS. Pai R (2014) Static characteristics of a fluid film bearing with TiO2 based nanolubricant using the modified Krieger–Dougherty viscosity model and couple stress model. Tribol Int, 75(3): 69-79.
  • Binu KG, Yatish K, Shenoy BS, Rao DS, Pai R (2017) Performance characteristics of finite journal bearings operating on TiO2 based nanolubricants. Pertanika J of Sci and Technol 25(3): 963-976.
  • Rao T, Rani A, Sufian S. Mohamed N (2017) Thin film hydrodynamic bearing analysis using nanoparticle additive lubricants. Eng App of Nanotechnology. Cham 3(6): 149-173.
  • Suryawanshi SR. Pattiwar JT. (2018) Effect of TiO2 nanoparticles blended with lubricating oil on the tribological performance of the journal bearing. Tribol in Industry 40 (3): 370-391.
  • Suryawanshi SR. Pattiwar JT., (2019) Experimental study on an influence of bearing geometry and TiO2 nanoparticle additives on the performance characteristics of fluid film lubricated journal bearing. Tribol in Industry 41(2): 220-236.
  • Hammza TM, Abdulkareem AA, Abas EN (2020) Influence of the solid particles nanofluid on the dynamic behaviour of rotor fluid film journal bearing systems. J of Mech Eng Research and Developments 43(7): 149-162.
  • Rasoolizadeh Shooroki A, Dashti Rahmatabadi A, Zare Mehrjardi M. (2021) Effect of volume percentage of nanoparticles added to the lubricant on the performance characteristics of the hydrodynamic textured journal bearings. J of Mech Eng Uni of Tabriz 51(2): 73-82.
  • Jason YJJ, How HG, Teoh YH. Chuah HG. (2020) A Study on the tribological performance of nanolubricants. Processes 8(11): 1372-1378.
  • Kotia A, Rajkhowa P, Rao GS, Ghosh SK, (2018) Thermophysical and tribological properties of nanolubricants: A review. Heat and Mass Trans 54(1): 3493-3508.
  • Saidur R, Kazi SN, Hossain MS, Rahman MM, Mohammed HA. (2011) A review on the performance of nanoparticles suspended with refrigerants and lubricating oils in refrigeration systems. Renewable and Sustainable Energy Reviews, 15 (1): 310-323.
  • Rahmatabadi AD, Zare Mehrjardi M, Fazel MR, (2010) Performance analysis of micropolar lubricated journal bearings using GDQ method. Tribol Int, 43(11): 2000-2009.
  • Lund JW. Thomsen KK, (1987) A calculation method and data for the dynamic coefficients of oil-lubricated journal bearings. Topics in Hydrodynamic Fluid Film Bearing and Rotor Bearing System Design and Optimization In: ASME conference, Chicago: 1–29.
  • Khonsari M. M., Brewe D. E., (1989) On the performance of finite journal bearings lubricated with micropolar fluids. STLE, Tribol Int, 32(2): 155-160.
Journal of Solid and Fluid Mechanics
Volume 12, Issue 3
September and October 2022
Pages 103-116

Files

Share

How to cite

Statistics