Study on oil film spreading characteristics on the jet lubricating tooth surface of aviation herringbone gear
Abstract
Purpose
During the oil lubrication process of aviation herringbone gears, lubricating oil is injected into and spreads around the tooth surface. Its spreading characteristics directly affect the lubrication state and transmission efficiency of gears. This study aims to investigate the effect of changing the injection parameters and gear operating conditions on the oil film deposition during injection lubrication.
Design/methodology/approach
The computational fluid dynamics method was used to establish the computational domain for the simulation and optimization using an orthogonal test. The oil film spreading and thickness of the tooth surface were calculated with the change in gear speed, fuel injection distance and fuel injection speed. Optimized oil injection lubrication parameters were obtained, and design ideas were provided for the oil injection lubrication analysis of aviation herringbone gears.
Findings
Under different operating conditions, such as varying the injection speed, gear rotational speed and injection distance, there were differences in the distribution of the lubricating oil film formed on the tooth surface. The thickness of the oil film decreases as the distance from the injection port increases. The thickness of the oil film deposition can be increased by increasing the injection velocity and reducing the gear rotation speed. The injection distance had a relatively small effect on the spreading thickness of the deposited oil film, affecting only the dynamic spreading process of oil film deposition. Furthermore, the simulation results are compared with the analytical calculation results, and finally the experimental verification is carried out.
Originality/value
Oil spray lubrication characteristics are important for achieving precise gear lubrication designs in the aerospace field.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2023-0250/
Keywords
Acknowledgements
This research was funded by the Basic Scientific Research Key Project of the Education Department of Liaoning Province (No. LJKZ0603), Doctoral Research Start-up Fund Project of Liaoning Province (No.2022-BS-308) and 2024 Fundamental Research Project (No. LJ212410154002) of the Educational Department of Liaoning Province.
Ethical compliance: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Citation
Chu, X., Liu, Y. and Shang, Z. (2024), "Study on oil film spreading characteristics on the jet lubricating tooth surface of aviation herringbone gear", Industrial Lubrication and Tribology, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/ILT-08-2023-0250
Publisher
:Emerald Publishing Limited
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