Microgroove optimization to improve hydrodynamic bearing performance

Author(s)

Ramos, D. J. ; Daniel, G. B.

• Document type: Journal article
• Source: TRIBOLOGY INTERNATIONAL; v. 174, p. 12-pg., 2022-10-01.

Abstract

Several researches on hydrodynamic bearings has looked for alternatives to increase their performance. Solutions involving modifications in oil feeding grooves and bearing geometry, as well as the development of new concepts are examples of these studies. Among these proposals, surface texturing gained a lot of attention with the promising results achieved. In this context, a new approach is investigated to optimize the hydrodynamic bearing performance, considering microgrooves with different depth distributed on the bearing surface. In this work, metrics that evaluate the bearing performance were chosen, in order to establish objective functions to optimize the bearing surface. The results obtained show that a proper microgrooves distribution can increase the bearing performance, allowing the increase of the load capacity, reduction of the viscous shear force and reduction of the average temperature in the bearing. In order to simplify the results obtained for the optimal surface, artificial filters were applied to provide surfaces with greater ease of manufacture, without compromising the improvements achieved in the optimization process. Based on these results, the proposed approach in this paper showed to be a promising alternative to increase the performance of hydrodynamic bearings. (AU)

• FAPESP's process: 15/20363-6 - Fault tolerant identification and control of rotating systems
• Grantee: Katia Lucchesi Cavalca Dedini
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 18/11298-4 - Development of an active hydrodynamic bearing for application in rotary systems
• Grantee: Douglas Jhon Ramos
• Support Opportunities: Scholarships in Brazil - Doctorate