高速重载齿轮传动的气液共相润滑-动力学耦合建模与润滑失效机理研究

作为大型舰船、航空航天与能源装备的核心传动部件，高速重载齿轮的磨损与点蚀已成为最突出的问题，根本原因体现在气液共相润滑与齿轮动力学的关联机制不明、高速齿轮润滑失效机理尚未厘清。本项目以高速重载航空齿轮传动为研究对象，提出一种联合热力学、动力学与摩擦学研究高速齿轮润滑失效机理的新途径。以掌握高速重载齿轮的动力学与润滑关联设计理论为主线，系统研究气液共相润滑下航空齿轮的热力学、摩擦学与动力学耦合计算方法、以及啮合冲击、高温升、空化协同作用下高速润滑失效机理等关键科学问题，揭示气液共相润滑与齿轮动力学的耦合机理，阐明啮合冲击、高温升下齿轮润滑性能的退化规律，建立高转速下空化效应与齿轮润滑失效的关联机制，探明三者协同作用下齿轮润滑失效机理与抑制方法，为突破高速重载齿轮润滑技术瓶颈提供理论基础和技术支撑。本项目的完成对提升高速齿轮润滑设计水平、提高航空齿轮的服役寿命具有重要的理论意义与应用价值。

As an important component in the transmission system of large ships, aircrafts and Energy equipment, wear and pitting pose serious problems to high-speed and heavy-load gears. The couple mechanism of oil-air two-phase lubrication and gear dynamics and the failure mechanism of high speed lubrication are unclear, which is the primary cause to wear and pitting. Focusing on the aeronautic gear with high-speed and heavy-load, the project proposes a novel research approach to the failure mechanism of high speed lubrication by coupling with gear thermodynamics, dynamics and tribology. To get the hang of the associated design theory of high-speed and heavy-load gears dynamics and lubrication, the project will systematically study the coupled design method of gear thermodynamics, tribology and dynamics under oil-air tow-phase lubrication and the failure mechanism of high-speed gear lubrication under the combined influence of mesh impact, high temperature and cavitation. The study aims to reveal the coupling mechanism of oil-air two-phase lubrication and gear dynamics, to illuminate the degradation law of gear lubrication performance under the mesh impact and high temperature rise, to clarify the correlation mechanism between cavitation effect and lubrication failure and to explore the failure mechanism and inhibition method of gear lubrication under the combined effect of mesh impact, high temperature and cavitation. These will provide the theoretical basis and technical support for breaking through the technical bottleneck of high-speed and heavy-load gear lubrication. The research results of this project are benefit to enhancing the design level of high-speed gear lubrication and improving the service life of aeronautic gears.