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Research Papers: Hydrodynamic Lubrication

Performance Studies of Powder-Lubricated Journal Bearing Having Different Pocket Shapes at Cylindrical Bore Surface

[+] Author and Article Information
Faisal Rahmani

Department of Mechanical Engineering,
IIT Delhi,
New Delhi 110016, India
e-mail: faisalrahmani@gmail.com

R. K. Pandey

Professor
Department of Mechanical Engineering,
IIT Delhi,
New Delhi 110016, India
e-mail: rajpandey@mech.iitd.ac.in

J. K. Dutt

Professor
Department of Mechanical Engineering,
IIT Delhi,
New Delhi 110016, India
e-mail: jkdutt@mech.iitd.ac.in

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received May 2, 2017; final manuscript received November 11, 2017; published online January 16, 2018. Assoc. Editor: Stephen Boedo.

J. Tribol 140(3), 031704 (Jan 16, 2018) (12 pages) Paper No: TRIB-17-1168; doi: 10.1115/1.4038678 History: Received May 02, 2017; Revised November 11, 2017

It becomes impossible to use conventional fluid film journal bearings in the hot working environments (500–800 °C) due to rapid thermal degradation of lubricating oils. Under this situation, powder lubricants prove beneficial in spite of high friction values associated with them in comparison to lubricating oils. Thus, reduction of friction in powder-lubricated journal bearings is an essential task for making the operation energy efficient. Hence, the objective of this paper is to explore the reduction of coefficient of friction in a powder-lubricated journal bearing employing different pocket shapes (elliptical, parabolic, rectangular, and trapezoidal) placed on bore surface. Based on the investigations reported herein, it is found that the journal bearing having rectangular pocket yields least coefficient of friction among all the cases.

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References

Wornyoh, E. Y. A. , Jasti, V. K. , and Higgs, C. F., III , 2007, “ A Review of Dry Particulate Lubrication: Powder and Granular,” ASME J. Tribol., 129(2), pp. 438–449. [CrossRef]
Rahmani, F. , Pandey, R. K. , and Dutt, J. K. , 2015, “ Powder and Granular Lubrication of Journal and Thrust Bearings: A Review,” Indian J. Tribol., 7(1), pp. 39–43. https://www.researchgate.net/profile/R_Pandey4/publication/288087238_POWDER_AND_GRANULAR_LUBRICATION_OF_JOURNAL_AND_THRUST_BEARINGS_A_REVIEW/links/567e360208ae19758387c471/POWDER-AND-GRANULAR-LUBRICATION-OF-JOURNAL-AND-THRUST-BEARINGS-A-REVIEW.pdf
Rahmani, F. , Dutt, J. K. , and Pandey, R. K. , 2016, “ Performance Behavior of Elliptical-Bore Journal Bearings Lubricated With Solid Granular Particulates,” Particuology, 27, pp. 51–60. [CrossRef]
Rahmani, F. , Dutt, J. K. , and Pandey, R. K. , 2016, “ Dynamic Characteristics of a Finite-Width Journal Bearing Lubricated With Powders,” Procedia Eng., 144, pp. 841–848. [CrossRef]
Heshmat, H. , 1992, “ The Quasi-Hydrodynamic Mechanism of Powder Lubrication—Part II: Lubricant Film Pressure Profile,” Lubr. Eng., 48(5), pp. 373–383. http://mohawkinnovative.com/portfolio/the-quasi-hydrodynamic-mechanism-of-powder-lubrication-part-ii-lubricant-film-pressure-profile/
Heshmat, H. , and Walton, J. F. , 1993, “ The Basics of Powder Lubrication in High-Temperature Powder-Lubricated Dampers,” ASME J. Eng. Gas Turbine Power, 115(2), pp. 372–382. [CrossRef]
Heshmat, H. , and Brewe, D. , 1995, “ Performance of Powder-Lubricated Journal Bearings With MoS2 Powder: Experimental Study of Thermal Phenomena,” ASME J. Tribol., 117(3), pp. 506–512. [CrossRef]
Heshmat, H. , and Brewe, D. E. , 1996, “ Performance of a Powder Lubricated Journal Bearing With WS2 Powder: Experimental Study,” ASME J. Tribol., 118(3), pp. 484–491. [CrossRef]
Higgs , C. F., III , Heshmat, C. A. , and Heshmat, H. , 1999, “ Comparative Evaluation of MoS2 and WS2 as Powder Lubricants in High Speed, Multi-Pad Journal Bearings,” ASME J. Tribol., 121(3), pp. 625–630. [CrossRef]
Heshmat, H. , 1999, “ On the Rheodynamics of Powder Lubricated Journal Bearing: Theory and Experiment,” Tribol. Ser., 36, pp. 537–549. [CrossRef]
Heshmat, H. , and Heshmat, C. A. , 1999, “ The Effect of Slider Geometry on the Performance of a Powder Lubricated Bearing,” Tribol. Trans., 42(3), pp. 640–646. [CrossRef]
Heshmat, H. , 2000, “ The Effect of Slider Geometry on the Performance of a Powder Lubricated Bearing—Theoretical Considerations,” Tribol. Trans., 43(2), pp. 213–220. [CrossRef]
Kaur, R. G. , and Heshmat, H. , 2002, “ 100 mm Diameter Self-Contained Solid/Powder Lubricated Auxiliary Bearing Operated at 30,000 RPM,” Tribol. Trans., 45(1), pp. 76–84. [CrossRef]
Chang, J. , Wang, W. , Zhao, M. , and Liu, K. , 2017, “ Experimental Study and Simulation Analysis on Friction Behavior of a Mechanical Surface Sliding on Hard Particles,” Proc. Inst. Mech. Eng. Part J, 231(10), pp. 1371–1379. [CrossRef]
Zeng, C. , Renouf, M. , Berthier, Y. , and Hamdi, R. , 2016, “ Numerical Investigation on the Electrical Transmission Ability of a Shearing Powder Layer,” Granul. Matter, 18(2), p. 19. [CrossRef]
Wang, W. , Gu, W. , and Liu, K. , 2015, “ Force Chain Evolution and Force Characteristics of Shearing Granular Media in Taylor-Couette Geometry by DEM,” Tribol. Trans., 58(2), pp. 197–206. [CrossRef]
Dai, F. , Khonsari, M. M. , and Lu, Z. Y. , 1994, “ On the Lubrication Mechanism of Grain Flows,” Tribol. Trans., 37(3), pp. 516–524. [CrossRef]
McKeague, K. T. , and Khonsari, M. M. , 1996, “ Generalized Boundary Interactions for Powder Lubricated Couette Flows,” ASME J. Tribol., 118(3), pp. 580–588. [CrossRef]
McKeague, K. T. , and Khonsari, M. M. , 1996, “ An Analysis of Powder Lubricated Slider Bearings,” ASME J. Tribol., 118(1), pp. 206–214. [CrossRef]
Tsai, H. J. , and Jeng, Y. R. , 2002, “ An Average Lubrication Equation for Thin Film Grain Flow With Surface Roughness Effects,” ASME J. Tribol., 124(4), pp. 736–742. [CrossRef]
Tsai, H. J. , and Jeng, Y. R. , 2006, “ Characteristics of Powder Lubricated Finite-Width Journal Bearings: A Hydrodynamic Analysis,” ASME J. Tribol., 128(2), pp. 351–357. [CrossRef]
Etsion, I. , 2005, “ State of the Art in Laser Surface Texturing,” ASME J. Tribol., 127(1), pp. 248–253. [CrossRef]
Kango, S. , Sharma, R. K. , and Pandey, R. K. , 2014, “ Thermal Analysis of Micro-Textured Journal Bearing Using Non-Newtonian Rheology of Lubricant and JFO Boundary Conditions,” Tribol. Int., 69, pp. 19–29. [CrossRef]
Kharbanda, J. K. , and Pandey, R. K. , 2014, “ Application of Tribology for Enhancing the Life of Sugar Mill Roll Bearing and Journal,” Int. Sugar J., 116(1387), pp. 490–495.
Sudeep, U. , Tandon, N. , and Pandey, R. K. , 2015, “ Performance of Lubricated Rolling/Sliding Concentrated Contacts With Surface Textures: A Review,” ASME J. Tribol., 137(3), p. 031501. [CrossRef]
Gropper, D. , Wang, L. , and Harvey, T. J. , 2016, “ Hydrodynamic Lubrication of Textured Surfaces: A Review of Modeling Techniques and Key Findings,” Tribol. Int., 94, pp. 509–529. https://doi.org/10.1016/j.triboint.2015.10.009
Aggarwal, S. , and Pandey, R. K. , 2017, “ Frictional and Load-Carrying Behaviors of Micro-Textured Sector Shape Pad Thrust Bearing Incorporating the Cavitation and Thermal Effects,” Lubr. Sci., 29(4), pp. 255–277. [CrossRef]
Bhardwaj, V. , Pandey, R. K. , and Agarwal, V. K. , 2017, “ Experimental Investigations for Tribo-Dynamic Behaviors of Conventional and Textured Races Ball Bearings Using Fresh and MoS2 Blended Greases,” Tribol. Int., 113, pp. 149–168. [CrossRef]
Haff, P. K. , 1983, “ Grain Flow as a Fluid-Mechanical Phenomenon,” J. Fluid Mech., 134, pp. 401–430. [CrossRef]
Dai, F. , and Khonsari, M. M. , 1993, “ A Continuum Theory of a Lubrication Problem With Solid Particles,” ASME J. Appl. Mech., 60(1), pp. 48–58. [CrossRef]
Johnson, P. C. , and Jackson, R. , 1987, “ Frictional–Collisional Constitutive Relations for Granular Materials With Application to Plane Shearing,” J. Fluid Mech., 176, pp. 67–93. [CrossRef]
Khonsari, M. M. , and Booser, E. R. , 2008, Applied Tribology: Bearing Design and Lubrication, 2nd ed., Wiley, Chichester, UK.

Figures

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Fig. 1

(a) CAD model of journal bearing with elliptical pocket; (b) three-dimensional (3D) view of unwrapped bearing surface with an elliptical pocket; (c) schematic diagram of pocketed journal bearing; (d) two-dimensional(2D) view of unwrapped bearing surface with an elliptical pocket; and (e) 2D view of unwrapped bearing surface with different pocket shapes

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Fig. 2

Flowchart for computation

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Fig. 4

3D pressure profiles and 2D contours with different shapes of bearing pocket (Wext=50N,  a¯=0.6)

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Fig. 5

2D pressure profiles in film (a) in circumferential direction at midplane (z¯=0.5); (b) in axial direction at the location of maximum pressure (Wext=50N,  a¯=0.6)

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Fig. 6

Pressure profiles and 2D contours with different shapes of bearing pocket (Wext=200N,  a¯=0.6)

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Fig. 7

Pressure profiles in bearings; (a) in circumferential direction at midplane (z¯=0.5); (b) in axial direction at the angle where pressure is maximum (Wext=200N,  a¯=0.6)

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Fig. 8

(a) Location of cross section around merging regions of pocket, (b) flow rate in circumferential direction at different cross sections (1-1, 2-2, 3-3, 4-4, and 5-5) at 50 N load, and (c) flow rate in circumferential direction at different cross sections (1-1, 2-2, 3-3, 4-4, and 5-5) at 200 N load

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Fig. 9

Comparison of performance parameters with different pocket shapes at 50 N and 200 N loads: (a) eccentricity ratio, (b) minimum film thickness, (c) friction force, and (d) coefficient of friction

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Fig. 10

Percentage change in performance parameters with variation in length of pocket with respect to conventional circular bore (Wext=50 N): (a) eccentricity ratio, (b) minimum film thickness, (c) side leakage, and (d) coefficient of friction

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Fig. 11

Percentage change in performance parameters with variation in length of pocket with respect to conventional circular bore (Wext=200N): (a) eccentricity ratio, (b) minimum film thickness, (c) side leakage, and (d) coefficient of friction

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Fig. 3

Comparison of friction coefficient (f) with work of authors [21]

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