The Enhancement of Oil Delivery and Bearing Performance via a Guiding-Structured Nozzle under Oil–Air Lubrication
The oil–air lubrication method is specifically employed for high or ultra-high-speed spindle rolling bearings. Under high-speed conditions, the air curtain formed inside the bearing cavity obstructs oil delivery, thereby limiting further increases in spindle rotation speed. To enhance oil delivery c...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
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| Series: | Lubricants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4442/12/2/60 |
| _version_ | 1797297648620797952 |
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| author | Xintian Zi Kai Chen Qinghua Bai Xinming Li Xuyang Jin Xu Wang Feng Guo |
| author_facet | Xintian Zi Kai Chen Qinghua Bai Xinming Li Xuyang Jin Xu Wang Feng Guo |
| author_sort | Xintian Zi |
| collection | DOAJ |
| description | The oil–air lubrication method is specifically employed for high or ultra-high-speed spindle rolling bearings. Under high-speed conditions, the air curtain formed inside the bearing cavity obstructs oil delivery, thereby limiting further increases in spindle rotation speed. To enhance oil delivery capability, a guiding-structured nozzle has been developed to concentrate the jet flow and improve penetration through the air curtain. Tests were conducted on an oil–air lubricated bearing test bench to investigate the impact of nozzle structures and oil types on torque and temperature rise. The results demonstrate that compared to conventional nozzles, the guiding-structured nozzle requires smaller optimal amounts of oil supply, indicating its superior ability to deliver oil. Further examination of oil jet patterns and droplet distributions confirms that the guiding-structured nozzle provides a more concentrated jet flow with uniform distribution and smaller droplet sizes in diameter. These characteristics contribute to highly efficient oil delivery. Additionally, synthetic oils reduce droplet size, torque, and temperature rise in mixed lubrication regimes due to their formation of an anti-friction absorption layer on rubbing surfaces. |
| first_indexed | 2024-03-07T22:23:24Z |
| format | Article |
| id | doaj.art-03a41752c2994d3a8de235542a627ded |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-07T22:23:24Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-03a41752c2994d3a8de235542a627ded2024-02-23T15:24:57ZengMDPI AGLubricants2075-44422024-02-011226010.3390/lubricants12020060The Enhancement of Oil Delivery and Bearing Performance via a Guiding-Structured Nozzle under Oil–Air LubricationXintian Zi0Kai Chen1Qinghua Bai2Xinming Li3Xuyang Jin4Xu Wang5Feng Guo6School of Mechanical & Automotive Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automotive Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automotive Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automotive Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automotive Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automotive Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Qingdao 266520, ChinaSchool of Mechanical & Automotive Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Qingdao 266520, ChinaThe oil–air lubrication method is specifically employed for high or ultra-high-speed spindle rolling bearings. Under high-speed conditions, the air curtain formed inside the bearing cavity obstructs oil delivery, thereby limiting further increases in spindle rotation speed. To enhance oil delivery capability, a guiding-structured nozzle has been developed to concentrate the jet flow and improve penetration through the air curtain. Tests were conducted on an oil–air lubricated bearing test bench to investigate the impact of nozzle structures and oil types on torque and temperature rise. The results demonstrate that compared to conventional nozzles, the guiding-structured nozzle requires smaller optimal amounts of oil supply, indicating its superior ability to deliver oil. Further examination of oil jet patterns and droplet distributions confirms that the guiding-structured nozzle provides a more concentrated jet flow with uniform distribution and smaller droplet sizes in diameter. These characteristics contribute to highly efficient oil delivery. Additionally, synthetic oils reduce droplet size, torque, and temperature rise in mixed lubrication regimes due to their formation of an anti-friction absorption layer on rubbing surfaces.https://www.mdpi.com/2075-4442/12/2/60oil–air lubricationnozzle structurehigh-speed bearingsoil deliver |
| spellingShingle | Xintian Zi Kai Chen Qinghua Bai Xinming Li Xuyang Jin Xu Wang Feng Guo The Enhancement of Oil Delivery and Bearing Performance via a Guiding-Structured Nozzle under Oil–Air Lubrication Lubricants oil–air lubrication nozzle structure high-speed bearings oil deliver |
| title | The Enhancement of Oil Delivery and Bearing Performance via a Guiding-Structured Nozzle under Oil–Air Lubrication |
| title_full | The Enhancement of Oil Delivery and Bearing Performance via a Guiding-Structured Nozzle under Oil–Air Lubrication |
| title_fullStr | The Enhancement of Oil Delivery and Bearing Performance via a Guiding-Structured Nozzle under Oil–Air Lubrication |
| title_full_unstemmed | The Enhancement of Oil Delivery and Bearing Performance via a Guiding-Structured Nozzle under Oil–Air Lubrication |
| title_short | The Enhancement of Oil Delivery and Bearing Performance via a Guiding-Structured Nozzle under Oil–Air Lubrication |
| title_sort | enhancement of oil delivery and bearing performance via a guiding structured nozzle under oil air lubrication |
| topic | oil–air lubrication nozzle structure high-speed bearings oil deliver |
| url | https://www.mdpi.com/2075-4442/12/2/60 |
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