Mechanics & Industry
Volume 18, Number 6, 2017
|Number of page(s)||20|
|Published online||02 February 2018|
Performance of two-lobe hole-entry hybrid journal bearing system under the combined influence of textured surface and couple stress lubricant
Tribology Laboratory, Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee,
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Accepted: 5 November 2016
Textured surface in journal bearings is becoming an important area of investigation during the last few years. Surface textures have the shapes of micro-dimple with a small diameter and depth having order of magnitude of bearing clearance. This paper presents the influence of couple stress lubricant on the circular and non-circular hole-entry hybrid journal bearing system and reports the comparative study between the textured and non-textured circular/non-circular hybrid journal bearing system. The governing Reynolds equation has been modified for the couple stress lubricant flow in the clearance of bearing and journal. The FEM technique has been applied to solve the modified Reynolds equation together with restrictor flow equation. The numerically simulated results indicate that the influence of couple stress lubricant is significantly more in textured journal bearing than that of non-textured journal bearing. Further, it has been observed that the textured two-lobe (δ = 1.1) hybrid journal bearing lubricated with couple stress lubricant provides larger values of fluid film stiffness coefficients and stability threshold speed against other bearings studied in the present paper.
Key words: non-recessed hybrid journal bearing / two-lobe bearing / couple stress lubricant / FEM technique / surface texture
© AFM, EDP Sciences 2017
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