Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model
The roller end/rib contact of tapered roller bearings significantly affects lubricating condition and power loss. To improve the lubrication performance of the inner ring rib and the large end of the roller in tapered roller bearings used in railway coaches, based on the structural analysis of the i...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Manufacturing Technology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmtec.2022.1029860/full |
| _version_ | 1827164688946823168 |
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| author | Xiaoling Liu Tao Long Xinming Li Feng Guo |
| author_facet | Xiaoling Liu Tao Long Xinming Li Feng Guo |
| author_sort | Xiaoling Liu |
| collection | DOAJ |
| description | The roller end/rib contact of tapered roller bearings significantly affects lubricating condition and power loss. To improve the lubrication performance of the inner ring rib and the large end of the roller in tapered roller bearings used in railway coaches, based on the structural analysis of the inner rib and the large end of the roller and considering spin–slide effects between the rib and the large end of the roller, a thermal elastohydrodynamic lubrication model with a Carreau rheological model was established in a tapered roller bearing. Two kinds of rib structures were provided: the tapered rib and spherical rib. Under different conditions, variations in the friction coefficient versus the ratio of curvature radius of the large end of the roller to that of the rib were compared, and the film thickness and film temperature varied with the rotational speed and the effect of load was compared between the two rib structures. Results showed that spinning motion has little effect on the lubrication at the contact point between the inner ring rib and the large end of the tapered roller. There exists an optimal ratio of the curvature radius between the large end of the roller and the spherical or tapered rib; moreover, the friction coefficient corresponding to this optimal ratio value is the smallest. With the increase in the inner ring speed, both film thickness and temperature increase for the two rib structures. Different from the spherical rib, the difference between the minimum and the central film thickness is almost unchangeable, and the tapered rib shows a slight temperature rise. As the load increases, the difference between the minimum and the central film thickness becomes larger, and the temperature in the contact zone gradually increases for the two ribs. Different from the tapered rib, the lower frictional coefficient and lower minimum film thickness are generated for the spherical rib because of higher film temperature. |
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| institution | Directory Open Access Journal |
| issn | 2813-0359 |
| language | English |
| last_indexed | 2025-03-21T01:20:35Z |
| publishDate | 2023-01-01 |
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| series | Frontiers in Manufacturing Technology |
| spelling | doaj.art-365c8eb0f1784f63baf7fc3b2bc9978a2024-08-03T02:20:58ZengFrontiers Media S.A.Frontiers in Manufacturing Technology2813-03592023-01-01210.3389/fmtec.2022.10298601029860Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau modelXiaoling LiuTao LongXinming LiFeng GuoThe roller end/rib contact of tapered roller bearings significantly affects lubricating condition and power loss. To improve the lubrication performance of the inner ring rib and the large end of the roller in tapered roller bearings used in railway coaches, based on the structural analysis of the inner rib and the large end of the roller and considering spin–slide effects between the rib and the large end of the roller, a thermal elastohydrodynamic lubrication model with a Carreau rheological model was established in a tapered roller bearing. Two kinds of rib structures were provided: the tapered rib and spherical rib. Under different conditions, variations in the friction coefficient versus the ratio of curvature radius of the large end of the roller to that of the rib were compared, and the film thickness and film temperature varied with the rotational speed and the effect of load was compared between the two rib structures. Results showed that spinning motion has little effect on the lubrication at the contact point between the inner ring rib and the large end of the tapered roller. There exists an optimal ratio of the curvature radius between the large end of the roller and the spherical or tapered rib; moreover, the friction coefficient corresponding to this optimal ratio value is the smallest. With the increase in the inner ring speed, both film thickness and temperature increase for the two rib structures. Different from the spherical rib, the difference between the minimum and the central film thickness is almost unchangeable, and the tapered rib shows a slight temperature rise. As the load increases, the difference between the minimum and the central film thickness becomes larger, and the temperature in the contact zone gradually increases for the two ribs. Different from the tapered rib, the lower frictional coefficient and lower minimum film thickness are generated for the spherical rib because of higher film temperature.https://www.frontiersin.org/articles/10.3389/fmtec.2022.1029860/fulltapered roller bearingCarreau modelinner rib structuresroller endthermal EHL |
| spellingShingle | Xiaoling Liu Tao Long Xinming Li Feng Guo Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model Frontiers in Manufacturing Technology tapered roller bearing Carreau model inner rib structures roller end thermal EHL |
| title | Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model |
| title_full | Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model |
| title_fullStr | Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model |
| title_full_unstemmed | Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model |
| title_short | Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model |
| title_sort | thermal ehl analysis of the inner ring rib and roller end in tapered roller bearings with the carreau model |
| topic | tapered roller bearing Carreau model inner rib structures roller end thermal EHL |
| url | https://www.frontiersin.org/articles/10.3389/fmtec.2022.1029860/full |
| work_keys_str_mv | AT xiaolingliu thermalehlanalysisoftheinnerringribandrollerendintaperedrollerbearingswiththecarreaumodel AT taolong thermalehlanalysisoftheinnerringribandrollerendintaperedrollerbearingswiththecarreaumodel AT xinmingli thermalehlanalysisoftheinnerringribandrollerendintaperedrollerbearingswiththecarreaumodel AT fengguo thermalehlanalysisoftheinnerringribandrollerendintaperedrollerbearingswiththecarreaumodel |