双激励耦合与悬臂式弹性支承影响的高速高比压滑动轴承系统润滑和动力学分析

项目名称： 双激励耦合与悬臂式弹性支承影响的高速高比压滑动轴承系统润滑和动力学分析

项目编号： No.51505384

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 王琳

作者单位： 西北工业大学

项目金额： 21万元

中文摘要： 高承载高稳定性的滑动轴承系统是齿轮传动涡扇发动机（Geared Turbo Fan engine，简称GTF）减速器支承技术研究的一项重要内容，而航空发动机对重量尺寸的限制、减速器的特殊结构及支承轴承所处复杂工况使得以往滑动轴承的研究模型和技术难以满足要求。本项目以具有“转轴固定、轴瓦旋转”结构特征的GTF滑动轴承系统为对象，围绕高速高比压工况、内外啮合力双激励耦合与悬臂式弹性支承影响下产生的科学问题和关键技术，对其进行润滑和动力学分析，阐明微织构/动静压油腔多尺度混成设计模式下高速高比压滑动轴承系统的承载机理，揭示基于定制承载量的悬臂式弹性支承GTF滑动轴承系统的载荷分流机制，建立双激励耦合与悬臂式弹性支承影响的GTF滑动轴承系统非线性动力学分析模型。本项目对于发展高承载高稳定性GTF滑动轴承系统的新理论模型和新技术路径，拓展滑动轴承及工程摩擦学的研究领域和应用范畴都具有重要意义。

中文关键词： 高速高比压滑动轴承；耦合激励；悬臂式弹性支承；润滑性能；动力学分析

英文摘要： The journal bearing system with high load carrying capacity and high stability is an important part of Geared Turbo Fan engine (GTF). The traditional theory model and technology system are not suitable for journal bearings used in aero-engines for the restriction of weight and size, the special structure of gear reducer, and the complex conditions of journal bearings. In order to solve the scientific problems and key techniques under the influence of two coupling excitations and cantilevered flexible support, the lubrication performance and dynamic analysis of the high-speed and high-specific-pressure journal bearing system in GTF is studied in this project. The research is carried out by theoretical analysis, numerical simulation, and experimental test. A model incorporating the coupling influence of surface texture and hybrid recesses is developed to study the hydrodynamic journal bearing. The loading mechanism of the bearing under high-speed and high-specific-pressure condition is clarified. The load sharing method based on the customized load carrying capacity is explored. And this method is used for optimizing the load distribution of GTF journal bearing system supported by the cantilevered flexible support. The nonlinear dynamic model of the GTF journal bearing system incorporating the influence of two coupling excitations and cantilevered flexible support is firstly developed, and then a dynamic analysis model is established for the journal bearing-gear-shaft system. And the influence of the interaction on the dynamic performance of journal bearing-gear-shaft system is also investigated. A technical method is developed to improve the performance of input and output in the journal bearing system. The work of this project is significant for developing new theoretical model and new technical system, expanding and improving the research areas and application fields of journal bearing and engineering tribology.

英文关键词： High-Speed and High-Specific-Pressure Journal Bearing;Coupling Excitations;Cantilevered Flexible Support;Lubrication Performance;Dynamic Analysis