A Novel Geometry Optimization Approach for Multi-Recess Hydrostatic Bearing Pad Operating in Static and low-Speed Conditions Using CFD Simulation

• Published in: Tribology letters 2023-06, Vol.71 (2), p.52, Article 52
• Main Authors: Michalec, Michal, Ondra, Martin, Svoboda, Martin, Chmelík, Jiří, Zeman, Petr, Svoboda, Petr, Jackson, Robert L.
• Format: Article
• Language: English
• Subjects: Chemistry and Materials Science; Computational fluid dynamics; Corrosion and Coatings; Electric fields; Energy consumption; Fluid dynamics; Geometry; Hybrid bearings; Industrial design; Investigations; Journal bearings; Laminar flow; Low speed; Lubricants & lubrication; Materials Science; Mathematical models; Mechanical engineering; Nanotechnology; Optimization; Original Paper; Parameters; Physical Chemistry; Surfaces and Interfaces; Theoretical and Applied Mechanics; Thin Films; Thrust bearings; Tribology
• ISSN: 1023-8883; 1573-2711
• DOI: 10.1007/s11249-023-01726-3

The design of a hydrostatic bearing pad is limited to simple geometry using analytical equations or one-parameter optimization based on experimental data. This study proposes and investigates a new two-parameter method for estimating optimal hydrostatic bearing pad proportions—recess area and position, using Computational Fluid Dynamics (CFD). In this study, 3D static CFD quarter model of a multi-recess hydrostatic bearing pad assuming laminar flow is used. The CFD model was calibrated based on experimentally obtained results and the literature. The recess pressure and resulting load are evaluated for a variety of recess positions and areas. Performance factors are calculated and interpolated in the MATLAB environment. Using the proposed novel two-parameter optimization, the energetic loss was reduced by 20% compared to the classical one-parameter approach. This methodology allows versatile and effective design of optimal hydrostatic bearings operating in low-speed conditions to achieve minimum energetic loss.