热力耦合作用的航空发动机主轴球轴承动力学分析  

Dynamic analysis of aero-engine spindle ball bearings with thermal-mechanical coupling

作　　者：曹赛赛 杨海生[1] 罗斌 唐瑞 邓四二[1] CAO Saisai;YANG Haisheng;LUO Bin;TANG Rui;DENG Sier(School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang Henan 471003,China;Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Chengdu 610500,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]中国航发四川燃气涡轮研究院,成都610500

出　　处：《航空动力学报》2024年第12期426-439,共14页Journal of Aerospace Power

基　　金：国家自然科学基金(52005158)。

摘　　要：为更准确分析航空发动机轴承动态特性,基于滚动轴承动力学理论和传热学理论,建立了一种航空发动机主轴球轴承热力耦合的动力学模型。采用预估-校正的GSTIFF变步长积分算法求解动力学微分方程组,分析了轴承供油体积流量和供油温度对轴承温度及轴承动力学影响。研究结果表明:球轴承高速运行时轴承动力学特性受轴承生热影响较大;增大供油体积流量有助于降低轴承温度以及减小钢球与保持架之间碰撞力,但过大的供油体积流量会导致轴承保持架振动增大;供油温度主要影响轴承温度以及润滑油黏度,保持架与引导套圈间的作用力随着供油温度的升高而降低。当供油温度在120℃时轴承保持架振动最小。In order to analyze the dynamic characteristics of aero-engine bearings more accurately,a thermal-mechanical coupling dynamic model of aero-engine spindle ball bearings was established based on the dynamic theory of rolling bearings and heat transfer theory.Then,the dynamic differential equations were solved using the GSTIFF variable step size integral algorithm,and the effects of bearing oil supply and temperature on bearing temperature and bearing dynamics were analyzed.The results showed that the dynamic characteristics of ball bearings were greatly affected by bearing heat generation when ball bearings were running at high speeds.When the oil supply increased,the bearing temperature and the collision force between the ball and the cage were reduced.However,too much oil supply could lead to an increase in bearing cage vibration.The oil supply temperature mainly affected the bearing temperature and lubricating oil viscosity.The acting force between the cage and the guide ring decreased with the increase of the oil supply temperature.The bearing cage vibration was minimal when the oil supply temperature was 120℃.

关 键 词：热力耦合 角接触球轴承 热网格法 动力学 保持架碰撞力 

分 类 号：V233.45[航空宇航科学与技术—航空宇航推进理论与工程]