A new concept of active hydrodynamic bearing for application in rotating systems
| Autor: | Gregory Bregion Daniel, Douglas Jhon Ramos |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Bearing (mechanical) Rotor (electric) Mechanical Engineering Hydrodynamic forces Fluid bearing 02 engineering and technology Surfaces and Interfaces Mechanics 021001 nanoscience & nanotechnology Instability Surfaces Coatings and Films law.invention Computational simulation 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials law Oil film 0210 nano-technology Oil temperature |
| Zdroj: | Tribology International. 153:106592 |
| ISSN: | 0301-679X |
| DOI: | 10.1016/j.triboint.2020.106592 |
| Popis: | Conventional hydrodynamic journal bearings applied to rotating machines are susceptible to some undesired conditions, such as fluid-induced instability, high increase of temperature and load capacity inefficiency. To avoid these conditions, a new concept of hydrodynamic bearing is proposed in which the own bearing motion is considered, thus making possible to change the average velocity of the lubricating oil film inside the bearing. The rotor dynamic behavior as well as the hydrodynamic forces developed in the bearings are initially evaluated through computational simulation, allowing to verify the advantages and improvements obtained through this new bearing concept. The numerical results show that this new bearing is able to avoid fluid-induce instability in the rotating system, in addition to acting on reducing the oil temperature and bearing load capacity. Based on these results, the new concept of bearing represents a promising alternative to improve the performance of rotating machines. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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