摘要
高速滚子轴承的动态特性对航空发动机转子系统的性能有重要的影响,为得到较准确的轴承动态性能,采用拟动力学法建立承受四自由度载荷的滚子轴承动力学分析模型,模型中各零件之间的力和力矩由建立的轴承零件相互作用模型计算得到,并使用较精确的弹流模型计算拖动力,给出了非圆滚道轴承动态性能的计算方法。通过算例分析了工况参数和结构参数对滚子轴承动态特性的影响规律,最后通过实验结果验证了程序的可靠性。滚子轴承动态特性的研究为研究航空发动机转子-轴承动态性能耦合分析奠定了基础。
The dynamic characteristics of roller bearings at high speed have important effect on rotor system of aero-engine. In order to obtain the accurate dynamic characteristics of roller bearings, the dynamic analysis models of roller bearings under four-DOF load are established by quasi-dynamic method, in which forces and moments are obtained from inter-action model of bearing parts and traction force is computed by an accurate traction model. The computational method of dynamic characteristics of bearing with noncircular raceway is given. The rules of impact of different operating condition parameters and bearing structure parameters on dynamic characteristics of roller bearings are analyzed by the program. Finally, the accurateness of the program is verified by the test data. The study of dynamic characteristics of ball bearings establishes the foundation for the further study of dynamic characteristic coupling analysis of rotor-bearing system.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2008年第2期492-498,共7页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(50575054)
关键词
滚子轴承
动态特性
拟动力学
四自由度载荷
非圆滚道
roller bearing
dynamic characteristic
quasi-dynamic
four-DOF load
noncircular raceway
