Using a New Design of Slant Groove Depth to Improve Loading Performance of Micro-Hydrodynamic Herringbone Bearings
| Autor: | Yee-Ting Lee, 李宜庭 |
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| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 As compared to conventional bearings, hydrodynamic bearings have the characteristics of higher precision and longer service life. Consequently, hydrodynamic bearings have been extensively employed as a key component of the rotating mechanism for all types of machinery and equipment. This study presents a new groove profile using the slant groove depth arrangements to enhance the load performance of micro-hydrodynamic grooved journal bearings (HGJBs). The computational analysis was based on the steady-state three-dimensional conservation equations of mass and momentum in conjunction with the cavitation model to examine the complex lubricated flow field. The simulated results of load capacity and circumferential pressure distribution of lubricant film are in good agreement with the measurement data and the predictions cited in the literature. Numerical experiments were extended to determine the pressure distribution, load capacity, radial stiffness and friction torque by varying the slant ratio of groove depth, eccentricity ratio, rotational speed and attitude angle. The cavitation extent of lubricant film was also studied for different slant groove patterns. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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