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Thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: Comparison between Babbitt, PTFE and DLC
The hydrodynamic lubrication and thermal analysis of tilting pad thrust bearings has been a major subject for many studies in the field of tribology. There is only a limited number of studies regarding thrust bearings with coated surfaces. The purpose of this study is to build a parametric, iterativ...
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| Format: | Default Article |
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2018
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| Online Access: | https://hdl.handle.net/2134/33842 |
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| _version_ | 1818169550024212480 |
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| author | Konstantinos Katsaros Dimitrios A. Bompos Pantelis Nikolakopoulos Stephanos Theodossiades |
| author_facet | Konstantinos Katsaros Dimitrios A. Bompos Pantelis Nikolakopoulos Stephanos Theodossiades |
| author_sort | Konstantinos Katsaros (5315051) |
| collection | Figshare |
| description | The hydrodynamic lubrication and thermal analysis of tilting pad thrust bearings has been a major subject for many studies in the field of tribology. There is only a limited number of studies regarding thrust bearings with coated surfaces. The purpose of this study is to build a parametric, iterative algorithm in order to perform a complete thermal and hydrodynamic lubrication analysis for pivoted pad thrust bearings with coatings. The analytical model is mainly based on the energy, continuity and Navier-Stokes equations, which are solved numerically with the Semi-Implicit Method for Pressure Linked Equations Consistent (SIMPLEC) method. The analysis focuses on a single pivoted pad of the thrust bearing. The thermal properties of the coating material are taken into account and the resulting thermal and flow fields are solved. The basic hydrodynamic and tribological characteristics are calculated for an uncoated, a Babbitt coated, a PTFE coated and a diamond like carbon (DLC) coated pivoted pad thrust bearing. The pressure and the film thickness distribution, as well as the load capacity and the frictional forces, are determined for several pad positions and velocities of the rotor. A mineral oil lubricant is used to estimate the shear thinning or thickening effects on the pad tribological performance. The results indicate that pads coated with PTFE and DLC show lower friction forces compared to the common steel and Babbitt applications. At the same time, the DLC coating seems to affect the bearing's flow and thermal fields less than the PTFE, making it more suitable for thrust bearings applications. |
| format | Default Article |
| id | rr-article-9566363 |
| institution | Loughborough University |
| publishDate | 2018 |
| record_format | Figshare |
| spelling | rr-article-95663632018-05-17T00:00:00Z Thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: Comparison between Babbitt, PTFE and DLC Konstantinos Katsaros (5315051) Dimitrios A. Bompos (7213340) Pantelis Nikolakopoulos (7211588) Stephanos Theodossiades (1247457) Mechanical engineering not elsewhere classified Hydrodynamic lubrication Thermal effects Thrust bearing Navier–Stokes Coating Mechanical Engineering not elsewhere classified The hydrodynamic lubrication and thermal analysis of tilting pad thrust bearings has been a major subject for many studies in the field of tribology. There is only a limited number of studies regarding thrust bearings with coated surfaces. The purpose of this study is to build a parametric, iterative algorithm in order to perform a complete thermal and hydrodynamic lubrication analysis for pivoted pad thrust bearings with coatings. The analytical model is mainly based on the energy, continuity and Navier-Stokes equations, which are solved numerically with the Semi-Implicit Method for Pressure Linked Equations Consistent (SIMPLEC) method. The analysis focuses on a single pivoted pad of the thrust bearing. The thermal properties of the coating material are taken into account and the resulting thermal and flow fields are solved. The basic hydrodynamic and tribological characteristics are calculated for an uncoated, a Babbitt coated, a PTFE coated and a diamond like carbon (DLC) coated pivoted pad thrust bearing. The pressure and the film thickness distribution, as well as the load capacity and the frictional forces, are determined for several pad positions and velocities of the rotor. A mineral oil lubricant is used to estimate the shear thinning or thickening effects on the pad tribological performance. The results indicate that pads coated with PTFE and DLC show lower friction forces compared to the common steel and Babbitt applications. At the same time, the DLC coating seems to affect the bearing's flow and thermal fields less than the PTFE, making it more suitable for thrust bearings applications. 2018-05-17T00:00:00Z Text Journal contribution 2134/33842 https://figshare.com/articles/journal_contribution/Thermal-hydrodynamic_behaviour_of_coated_pivoted_pad_thrust_bearings_Comparison_between_Babbitt_PTFE_and_DLC/9566363 CC BY 4.0 |
| spellingShingle | Mechanical engineering not elsewhere classified Hydrodynamic lubrication Thermal effects Thrust bearing Navier–Stokes Coating Mechanical Engineering not elsewhere classified Konstantinos Katsaros Dimitrios A. Bompos Pantelis Nikolakopoulos Stephanos Theodossiades Thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: Comparison between Babbitt, PTFE and DLC |
| title | Thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: Comparison between Babbitt, PTFE and DLC |
| title_full | Thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: Comparison between Babbitt, PTFE and DLC |
| title_fullStr | Thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: Comparison between Babbitt, PTFE and DLC |
| title_full_unstemmed | Thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: Comparison between Babbitt, PTFE and DLC |
| title_short | Thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: Comparison between Babbitt, PTFE and DLC |
| title_sort | thermal-hydrodynamic behaviour of coated pivoted pad thrust bearings: comparison between babbitt, ptfe and dlc |
| topic | Mechanical engineering not elsewhere classified Hydrodynamic lubrication Thermal effects Thrust bearing Navier–Stokes Coating Mechanical Engineering not elsewhere classified |
| url | https://hdl.handle.net/2134/33842 |