旋转圆盘腔壁面油膜运动特性分析  

Analysis of Oil Film Movement Characteristic on the Wall of Rotating Disk Cavity

作　　者：万然[1] 张永红[1] 陈国定[1] 刘阳[1] 郁丽 

机构地区：[1]西北工业大学机电学院,陕西西安710072 [2]中国航空工业集团沈阳航空发动机设计研究所,辽宁沈阳110015

出　　处：《机械传动》2013年第2期70-75,共6页Journal of Mechanical Transmission

基　　金：航空基金(20100453004);国家自然科学基金(51275411)

摘　　要：分析了基于一种航空发动机轴承腔的拓扑结构——旋转圆盘腔壁面油膜的形成和运动特性。在获得旋转圆盘腔气相介质流场的基础上,建立了考虑油滴重力及空气阻力的油滴运动、油滴沉积及油膜运动模型,讨论了圆盘腔结构以及工况对于油膜运动特性的影响。研究结果表明,低速和高速工况下腔壁左右两侧油膜受力的不同导致油膜流动方向不同,油膜厚度和油膜平均速度沿圆盘腔壁面的周向分布规律有明显的差异;进油量和腔体结构对圆盘腔左右两侧的油膜厚度和平均速度影响会有差异,而且差异在低转速工况下会更加明显。A rotating disk cavity - the topology structure of simplified aero - engines beating chamber is em- ployed to analyze the formation and movement characteristics of oil film. Considering oil droplets gravity and air resis- tance, the oil droplet movement equitation, oil deposition and oil film movement model are built based on the data of the gas phase gained by CFD software, the impacts of the disk cavity structure and operating conditions on the movement of the oil film is discussed. The results indicate the movement directions of oil film on left and right side chand3er wall are different, and the distribution of oil fihn thickness and mean velocity along wall circumferential direction is notable dif- ference, the structure of the disk cavity and oil supply quantity play significant roles on the movement and thickness of the oil film, especially for low rotor speed.

关 键 词：轴承腔 旋转圆盘腔 壁面油膜 油膜厚度 油膜速度 

分 类 号：V233.42[航空宇航科学与技术—航空宇航推进理论与工程]