The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication
With the extensive coverage of the rail transit system, ensuring the safe operation of rail vehicles is an important prerequisite. Insufficient lubrication will cause friction and wear of axle box bearings, which is directly related to ensured safety of high-speed trains. A non-Newtonian elastohydro...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Lubricants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4442/8/7/76 |
| _version_ | 1827713132457361408 |
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| author | Heli Wang Haifeng Huang Sibo Yu Weijie Gu |
| author_facet | Heli Wang Haifeng Huang Sibo Yu Weijie Gu |
| author_sort | Heli Wang |
| collection | DOAJ |
| description | With the extensive coverage of the rail transit system, ensuring the safe operation of rail vehicles is an important prerequisite. Insufficient lubrication will cause friction and wear of axle box bearings, which is directly related to ensured safety of high-speed trains. A non-Newtonian elastohydrodynamic lubrication(EHL) between tapered rolling elements and inner ring of axle box bearing in high-speed trains was established by numeric simulation. The input parameters of working conditions, including velocity, acceleration and plastic viscosity, were changed, considering the actual application and their influence trends on film-forming characteristics were analyzed. As a result, a phase of acceleration of starting or a process of braking at a low speed tends to occur mixed lubrication. Therefore, a method of optimizing surface morphology of rolling elements was adopted to improve lubrication. Based on comparison experiments, it was recommended that RMS roughness was greater than 0.03 μm and less than 0.1 μm and kurtosis was three and skewness was negative in a range of −1 to −0.5 and texture direction was parallel to rotation direction. The optimized surface promotes the transition from mixed-lubrication to full film lubrication, which alleviated the problem of surface damage due to insufficient lubrication and prolongated the service life. |
| first_indexed | 2024-03-10T18:28:47Z |
| format | Article |
| id | doaj.art-8c95b00cbdb64c92b3d50137eb2051e5 |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-10T18:28:47Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-8c95b00cbdb64c92b3d50137eb2051e52023-11-20T06:46:40ZengMDPI AGLubricants2075-44422020-07-01877610.3390/lubricants8070076The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease LubricationHeli Wang0Haifeng Huang1Sibo Yu2Weijie Gu3School of Mechanical Engineering, Southwest Jiaotong University, 111 Section One, North Second Ring Road, Chengdu 610031, ChinaSchool of Mechanical Engineering, Southwest Jiaotong University, 111 Section One, North Second Ring Road, Chengdu 610031, ChinaSchool of Mechanical Engineering, Southwest Jiaotong University, 111 Section One, North Second Ring Road, Chengdu 610031, ChinaSchool of Mechanical Engineering, Southwest Jiaotong University, 111 Section One, North Second Ring Road, Chengdu 610031, ChinaWith the extensive coverage of the rail transit system, ensuring the safe operation of rail vehicles is an important prerequisite. Insufficient lubrication will cause friction and wear of axle box bearings, which is directly related to ensured safety of high-speed trains. A non-Newtonian elastohydrodynamic lubrication(EHL) between tapered rolling elements and inner ring of axle box bearing in high-speed trains was established by numeric simulation. The input parameters of working conditions, including velocity, acceleration and plastic viscosity, were changed, considering the actual application and their influence trends on film-forming characteristics were analyzed. As a result, a phase of acceleration of starting or a process of braking at a low speed tends to occur mixed lubrication. Therefore, a method of optimizing surface morphology of rolling elements was adopted to improve lubrication. Based on comparison experiments, it was recommended that RMS roughness was greater than 0.03 μm and less than 0.1 μm and kurtosis was three and skewness was negative in a range of −1 to −0.5 and texture direction was parallel to rotation direction. The optimized surface promotes the transition from mixed-lubrication to full film lubrication, which alleviated the problem of surface damage due to insufficient lubrication and prolongated the service life.https://www.mdpi.com/2075-4442/8/7/76high-speed trainstapered rolling elementsnon-Newtonian elastohydrodynamic lubricationmixed lubricationsurface morphology |
| spellingShingle | Heli Wang Haifeng Huang Sibo Yu Weijie Gu The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication Lubricants high-speed trains tapered rolling elements non-Newtonian elastohydrodynamic lubrication mixed lubrication surface morphology |
| title | The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication |
| title_full | The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication |
| title_fullStr | The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication |
| title_full_unstemmed | The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication |
| title_short | The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication |
| title_sort | effect of surface morphology of tapered rolling bearings in high speed train on grease lubrication |
| topic | high-speed trains tapered rolling elements non-Newtonian elastohydrodynamic lubrication mixed lubrication surface morphology |
| url | https://www.mdpi.com/2075-4442/8/7/76 |
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