Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages
Corrugated damage to bearings is a common fault in electrical facilities such as new energy vehicles, wind power, and high-speed railways. The aim of this article is to reveal the microscopic characteristics and formation mechanism of such damages. The corrugation with alternating “light” and “dark”...
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MDPI AG
2024-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/17/4/859 |
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| author | Zhihao Lou Chenfei Song Yulong Ren Xianjuan Pang Huanhuan Lu Sanming Du Yongzhen Zhang |
| author_facet | Zhihao Lou Chenfei Song Yulong Ren Xianjuan Pang Huanhuan Lu Sanming Du Yongzhen Zhang |
| author_sort | Zhihao Lou |
| collection | DOAJ |
| description | Corrugated damage to bearings is a common fault in electrical facilities such as new energy vehicles, wind power, and high-speed railways. The aim of this article is to reveal the microscopic characteristics and formation mechanism of such damages. The corrugation with alternating “light” and “dark” shape was produced on GCr15 bearing races in the experimental conditions. Compared to the light area, the dark area (in the images generated by optical microscope) has more severe electrical erosion, lower hardness, more concave morphology, and lower oxidation. As the voltage increases, the width of the corrugation, the height difference between corrugation, and surface roughness all increase. It is believed that the formation of corrugated damage requires a sufficiently high voltage to induce the periodic destruction and reconstruction of the lubrication film. When the bearing is in a metal-lubrication film–metal contact state, the high voltage causes the lubrication film to break down and induce electrical erosion. Then, the contact area is in metal–metal contact, and the surface is mainly damaged by mechanical rolling. After the reconstruction of lubrication film, the next round of electrical erosion begins. The results are helpful for a deeper understanding of the mechanism of bearing erosion in electrical application. |
| first_indexed | 2024-03-07T22:22:55Z |
| format | Article |
| id | doaj.art-8a0e28a8013f4c70b896b77c659fbbda |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-07T22:22:55Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-8a0e28a8013f4c70b896b77c659fbbda2024-02-23T15:25:35ZengMDPI AGMaterials1996-19442024-02-0117485910.3390/ma17040859Formation of Corrugated Damage on Bearing Race under Different AC Shaft VoltagesZhihao Lou0Chenfei Song1Yulong Ren2Xianjuan Pang3Huanhuan Lu4Sanming Du5Yongzhen Zhang6National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, ChinaNational United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, ChinaNational United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, ChinaNational United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, ChinaNational United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, ChinaNational United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, ChinaNational United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, ChinaCorrugated damage to bearings is a common fault in electrical facilities such as new energy vehicles, wind power, and high-speed railways. The aim of this article is to reveal the microscopic characteristics and formation mechanism of such damages. The corrugation with alternating “light” and “dark” shape was produced on GCr15 bearing races in the experimental conditions. Compared to the light area, the dark area (in the images generated by optical microscope) has more severe electrical erosion, lower hardness, more concave morphology, and lower oxidation. As the voltage increases, the width of the corrugation, the height difference between corrugation, and surface roughness all increase. It is believed that the formation of corrugated damage requires a sufficiently high voltage to induce the periodic destruction and reconstruction of the lubrication film. When the bearing is in a metal-lubrication film–metal contact state, the high voltage causes the lubrication film to break down and induce electrical erosion. Then, the contact area is in metal–metal contact, and the surface is mainly damaged by mechanical rolling. After the reconstruction of lubrication film, the next round of electrical erosion begins. The results are helpful for a deeper understanding of the mechanism of bearing erosion in electrical application.https://www.mdpi.com/1996-1944/17/4/859corrugated damageequivalent resistanceelectrical erosionlubrication leakagehardness |
| spellingShingle | Zhihao Lou Chenfei Song Yulong Ren Xianjuan Pang Huanhuan Lu Sanming Du Yongzhen Zhang Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages Materials corrugated damage equivalent resistance electrical erosion lubrication leakage hardness |
| title | Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages |
| title_full | Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages |
| title_fullStr | Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages |
| title_full_unstemmed | Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages |
| title_short | Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages |
| title_sort | formation of corrugated damage on bearing race under different ac shaft voltages |
| topic | corrugated damage equivalent resistance electrical erosion lubrication leakage hardness |
| url | https://www.mdpi.com/1996-1944/17/4/859 |
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