航空发动机主轴承环下润滑收油效率和润滑油分配试验  

Oil Capture Efficiency and Oil Distribution Tests for Under-Race Lubrication of an Aero-Engine Main Bearing

作　　者：袁细传 曹西征 李陆俊 刘宇 王鹏威 YUAN Xichuan;CAO Xizheng;LI Lujun;LIU Yu;WANG Pengwei(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002

出　　处：《轴承》2025年第4期64-69,共6页Bearing

摘　　要：为解决某航空发动机高dn值主轴承的供油难问题,设计了包括集成在附件齿轮箱上的润滑油喷嘴、浮动轴上的长输油通道、集成在中心拉杆上的收油结构和集成在离心叶轮上的前后2排润滑油供油孔的环下润滑供油结构,其中收油结构设计了带挡油坝和不带挡油坝2种方案,并针对该环下润滑供油结构开展了收油效率和润滑油流量分配试验。结果表明:带挡油坝的收油结构较不带挡油坝的结构收油效率明显提高;在试验流量范围内,前排供油孔的流量分配远大于后排供油孔,且由于挡油坝结构的存在,中心拉杆螺纹旋向与润滑油收油效率关系不大;随着喷嘴供油压力增大,前排供油孔与后排供油孔的流量比值逐渐减小。To solve the problem of difficult oil supply for main bearing with high dn value for an aero-engine,an under-race lubrication oil supply structure is designed,including a lubricating oil nozzle integrated on accessory gearbox,a long oil delivery channel on floating shaft,an oil capture structure integrated on central pull rod,and front and rear rows of lubricating oil supply holes integrated on centrifugal impeller.Two schemes of oil capture structure with and without oil dam are designed,and the oil capture efficiency and oil flow distribution tests are carried out for under-race lubrication oil supply structure.The results show that the oil capture efficiency of oil capture structure with oil dam is significantly higher than that of structure without oil dam;within test flow range,the flow distribution of front row of oil supply hole is much larger than that of rear row of oil supply hole,and due to presence of oil dam structure,the thread direction of central pull rod is not significantly related to oil capture efficiency;as the oil supply pressure of nozzle increases,the flow ratio between front and rear rows of oil supply holes gradually decreases.

关 键 词：滚动轴承 圆柱滚子轴承 主轴承 航空发动机 润滑方式 供油量 试验 结构设计 

分 类 号：TH133.33[机械工程—机械制造及自动化] V235.1[航空宇航科学与技术—航空宇航推进理论与工程]