A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing Zone
Under the trend of lightweight and high-efficiency development in industrial equipment, precise regulation of lubrication in gear reducers is a key breakthrough for enhancing transmission system efficiency and reliability. This study establishes a three-dimensional numerical model for high-speed gea...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Machines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-1702/13/7/606 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849733546613145600 |
|---|---|
| author | Wentao Zhao Lin Li Gaoan Zheng |
| author_facet | Wentao Zhao Lin Li Gaoan Zheng |
| author_sort | Wentao Zhao |
| collection | DOAJ |
| description | Under the trend of lightweight and high-efficiency development in industrial equipment, precise regulation of lubrication in gear reducers is a key breakthrough for enhancing transmission system efficiency and reliability. This study establishes a three-dimensional numerical model for high-speed gear jet lubrication using computational fluid dynamics (CFD) and dynamic mesh technology. By implementing the volume of fluid (VOF) multiphase flow model and the standard k-ω turbulence model, the study simulates the dynamic distribution of lubricant in gear meshing zones and analyzes critical parameters such as the oil volume fraction, eddy viscosity, and turbulent kinetic energy. The results show that reducing the oil injection distance significantly enhances lubricant coverage and continuity: as the injection distance increases from 4.8 mm to 24 mm, the lubricant shifts from discrete droplets to a dense wedge-shaped film, mitigating lubrication failure risks from secondary atomization and energy loss. The optimized injection distance also improves the spatial stability of eddy viscosity and suppresses excessive dissipation of turbulent kinetic energy, enhancing both the shear-load capacity and thermal management. Dynamic data from monitoring point P show that reducing the injection distance stabilizes lubricant velocity and promotes more consistent oil film formation and heat transfer. Through multiphysics simulations and parametric analysis, this study elucidates the interaction between geometric parameters and hydrodynamic behaviors in jet lubrication systems. The findings provide quantitative evaluation methods for structural optimization and energy control in gear lubrication systems, offering theoretical insights for thermal management and reliability enhancement in high-speed transmission. These results contribute to the lightweight design and sustainable development of industrial equipment. |
| format | Article |
| id | doaj-art-719934f41fa54d93966ab31df0462e35 |
| institution | DOAJ |
| issn | 2075-1702 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj-art-719934f41fa54d93966ab31df0462e352025-08-20T03:08:01ZengMDPI AGMachines2075-17022025-07-0113760610.3390/machines13070606A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing ZoneWentao Zhao0Lin Li1Gaoan Zheng2School of Intelligent Transportation, Zhejiang Polytechnic University of Mechanical and Electrical Engineering, Hangzhou 310053, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaSchool of Mechanical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, ChinaUnder the trend of lightweight and high-efficiency development in industrial equipment, precise regulation of lubrication in gear reducers is a key breakthrough for enhancing transmission system efficiency and reliability. This study establishes a three-dimensional numerical model for high-speed gear jet lubrication using computational fluid dynamics (CFD) and dynamic mesh technology. By implementing the volume of fluid (VOF) multiphase flow model and the standard k-ω turbulence model, the study simulates the dynamic distribution of lubricant in gear meshing zones and analyzes critical parameters such as the oil volume fraction, eddy viscosity, and turbulent kinetic energy. The results show that reducing the oil injection distance significantly enhances lubricant coverage and continuity: as the injection distance increases from 4.8 mm to 24 mm, the lubricant shifts from discrete droplets to a dense wedge-shaped film, mitigating lubrication failure risks from secondary atomization and energy loss. The optimized injection distance also improves the spatial stability of eddy viscosity and suppresses excessive dissipation of turbulent kinetic energy, enhancing both the shear-load capacity and thermal management. Dynamic data from monitoring point P show that reducing the injection distance stabilizes lubricant velocity and promotes more consistent oil film formation and heat transfer. Through multiphysics simulations and parametric analysis, this study elucidates the interaction between geometric parameters and hydrodynamic behaviors in jet lubrication systems. The findings provide quantitative evaluation methods for structural optimization and energy control in gear lubrication systems, offering theoretical insights for thermal management and reliability enhancement in high-speed transmission. These results contribute to the lightweight design and sustainable development of industrial equipment.https://www.mdpi.com/2075-1702/13/7/606gear reducerCFD methodoil injection distanceoil film lubrication characteristics |
| spellingShingle | Wentao Zhao Lin Li Gaoan Zheng A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing Zone Machines gear reducer CFD method oil injection distance oil film lubrication characteristics |
| title | A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing Zone |
| title_full | A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing Zone |
| title_fullStr | A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing Zone |
| title_full_unstemmed | A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing Zone |
| title_short | A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing Zone |
| title_sort | study on the influence mechanism of the oil injection distance on the oil film distribution characteristics of the gear meshing zone |
| topic | gear reducer CFD method oil injection distance oil film lubrication characteristics |
| url | https://www.mdpi.com/2075-1702/13/7/606 |
| work_keys_str_mv | AT wentaozhao astudyontheinfluencemechanismoftheoilinjectiondistanceontheoilfilmdistributioncharacteristicsofthegearmeshingzone AT linli astudyontheinfluencemechanismoftheoilinjectiondistanceontheoilfilmdistributioncharacteristicsofthegearmeshingzone AT gaoanzheng astudyontheinfluencemechanismoftheoilinjectiondistanceontheoilfilmdistributioncharacteristicsofthegearmeshingzone AT wentaozhao studyontheinfluencemechanismoftheoilinjectiondistanceontheoilfilmdistributioncharacteristicsofthegearmeshingzone AT linli studyontheinfluencemechanismoftheoilinjectiondistanceontheoilfilmdistributioncharacteristicsofthegearmeshingzone AT gaoanzheng studyontheinfluencemechanismoftheoilinjectiondistanceontheoilfilmdistributioncharacteristicsofthegearmeshingzone |