Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditions
Abstract Oil-impregnated porous polyimide (iPPI) materials are usually used as retainer for bearings. In these bearings, balls and rings, balls and retainers are two different kinds of contact. In this paper, the friction and wear properties of iPPI were investigated using steel (disc)—steel (ball)—...
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| Language: | English |
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Tsinghua University Press
2023-01-01
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| Series: | Friction |
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| Online Access: | https://doi.org/10.1007/s40544-022-0693-7 |
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| author | Jinbang Li Jinyang Liu Kai Li Ningning Zhou Yang Liu Xudong Hu Shunli Yin Guorong Wang |
| author_facet | Jinbang Li Jinyang Liu Kai Li Ningning Zhou Yang Liu Xudong Hu Shunli Yin Guorong Wang |
| author_sort | Jinbang Li |
| collection | DOAJ |
| description | Abstract Oil-impregnated porous polyimide (iPPI) materials are usually used as retainer for bearings. In these bearings, balls and rings, balls and retainers are two different kinds of contact. In this paper, the friction and wear properties of iPPI were investigated using steel (disc)—steel (ball)—iPPI (pin) double-contact friction test rig for simulating the actual contact in bearings. The results show that compared with that of iPPI—steel single contact, the friction coefficient of iPPI—steel in double contacts is lower and decreases with the amount of additional oil. The surface of iPPI in single contact suffers more wear compared with that in double contacts. Different from single contact, the worn surfaces of iPPI in double contacts are blackened. The Raman spectra of worn surfaces of balls and discs indicate that α-Fe2O3 and Fe3O4 were formed during rubbing of the double contacts. Many nanoscale iron oxide particles are found on the worn surfaces of iPPI in double contacts; on the contrary, few particles could be found on the surface in single contact. In double-contact friction, the nanoscale wear debris penetrates inside the iPPI material through the process of extruding and recycling of oil, which is the mechanism of the blackening of the iPPI worn surfaces. The studies show that the double-contact friction method is a new and effective method to study the friction in bearings, especially for those with polymer retainer. |
| format | Article |
| id | doaj-art-740c0aac7ba6489ea15e4f27b2ed4764 |
| institution | Kabale University |
| issn | 2223-7690 2223-7704 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Friction |
| spelling | doaj-art-740c0aac7ba6489ea15e4f27b2ed47642025-08-20T03:33:53ZengTsinghua University PressFriction2223-76902223-77042023-01-011181493150410.1007/s40544-022-0693-7Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditionsJinbang Li0Jinyang Liu1Kai Li2Ningning Zhou3Yang Liu4Xudong Hu5Shunli Yin6Guorong Wang7School of Mechanical Engineering & Mechanics, Ningbo UniversitySchool of Mechanical Engineering & Mechanics, Ningbo UniversitySchool of Mechanical Engineering & Mechanics, Ningbo UniversityBeijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms, Beijing Institute of Control EngineeringSchool of Mechanical Engineering & Mechanics, Ningbo UniversitySchool of Mechanical Engineering & Mechanics, Ningbo UniversityHealthy & Intelligent Kitchen Engineering Research Center of Zhejiang ProvinceState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum UniversityAbstract Oil-impregnated porous polyimide (iPPI) materials are usually used as retainer for bearings. In these bearings, balls and rings, balls and retainers are two different kinds of contact. In this paper, the friction and wear properties of iPPI were investigated using steel (disc)—steel (ball)—iPPI (pin) double-contact friction test rig for simulating the actual contact in bearings. The results show that compared with that of iPPI—steel single contact, the friction coefficient of iPPI—steel in double contacts is lower and decreases with the amount of additional oil. The surface of iPPI in single contact suffers more wear compared with that in double contacts. Different from single contact, the worn surfaces of iPPI in double contacts are blackened. The Raman spectra of worn surfaces of balls and discs indicate that α-Fe2O3 and Fe3O4 were formed during rubbing of the double contacts. Many nanoscale iron oxide particles are found on the worn surfaces of iPPI in double contacts; on the contrary, few particles could be found on the surface in single contact. In double-contact friction, the nanoscale wear debris penetrates inside the iPPI material through the process of extruding and recycling of oil, which is the mechanism of the blackening of the iPPI worn surfaces. The studies show that the double-contact friction method is a new and effective method to study the friction in bearings, especially for those with polymer retainer.https://doi.org/10.1007/s40544-022-0693-7porous polyimide (PPI)oil-impregnated materialdouble-contact frictionmicro-oil lubrication |
| spellingShingle | Jinbang Li Jinyang Liu Kai Li Ningning Zhou Yang Liu Xudong Hu Shunli Yin Guorong Wang Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditions Friction porous polyimide (PPI) oil-impregnated material double-contact friction micro-oil lubrication |
| title | Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditions |
| title_full | Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditions |
| title_fullStr | Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditions |
| title_full_unstemmed | Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditions |
| title_short | Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditions |
| title_sort | tribological properties of oil impregnated polyimide in double contact friction under micro oil lubrication conditions |
| topic | porous polyimide (PPI) oil-impregnated material double-contact friction micro-oil lubrication |
| url | https://doi.org/10.1007/s40544-022-0693-7 |
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