The dynamic performance analysis of chevron shape textured hydrodynamic bearings. Issue 1 (22nd July 2019)

• Record Type: Journal Article
• Authors: Jamwal, Gourav; Sharma, Sanjay; Awasthi, R.K.
• Is Part Of: Industrial lubrication and tribology. Volume 72:Issue 1(2020)
• Page Start: 1
• Page End: 8
• Publication Date: 2019-07-22
• Subjects: Finite element method -- Hydrodynamic journal bearing -- Dynamic characteristics -- Surface texturing -- Surface textures -- Stiffness coefficient -- FEM -- Damping coefficient -- Stability threshold speed; Lubrication and lubricants -- Periodicals; Tribology -- Periodicals; 621.89
• DOI: 10.1108/ILT-05-2019-0172
• Languages: English
• ISSNs: 0036-8792

Abstract

Abstract : Purpose: This paper aims to evaluate the various dynamic performance parameters of hydrodynamic journal bearings. For this, the bearing's inner surface is textured with chevron-shaped textures with different texture depths and number of textures in different regions/locations. Design/methodology/approach: In the present study, the effect of chevron-shaped texture having different values of texture depths, locations and number of textures has been numerically simulated. The dynamic performance characteristics have been calculated by solving the fluid flow governing Reynolds equation using the finite element method, assuming iso-viscous and Newtonian fluid. Findings: The obtained results indicate that the bearing stability can be improved with the help of surface texture. Among all the investigated texture locations, the maximum increase in stability threshold speed is observed for fully textured distribution. Moreover, for the chevron-shaped texture considered in the present study, the optimum values of texture depth and number of textures have also been determined for maximum bearing stability. Practical implications: While designing, designers should focus on those optimum values of texture depth, texture location and number of textures which lead to maximum enhancement in bearing stability. Originality/value: This study is useful in the appropriate selection of chevron-shaped texture parameters on bearing surface for the maximum bearing stability.