摘要
本文通过对滚动轴承支撑的内燃机转子系统故障模型的建立和非线性动力学行为的分析,为内燃机故障的诊断和研究提供理论参考。基于赫兹接触理论,得到了滚动轴承缺陷故障后系统的实际接触变形及轴承力的计算方法,并通过对系统动力学模型的建立和求解,得到系统故障后的非线性动力学响应。数值结果表明,轴承出现缺陷故障后,内燃机转子系统非线性响应变化明显,速度和位移波动明显加强,实际中可通过这些异常行为的检测诊断系统的故障。
This study can provide the academic reference to the diagnosis and research of Internal-combustion engine supported on rolling bearing-rotor system, by establishing the mathematical model and analyzing the responses of the rolling bearing while the bearing has localized defects. Based on the Hertz contact theory, the practical changes of contact deformation and nonlinear bearing forces were calculated depend on the above model, and the nonlinear dynamic responses of bearing-rotor system with defect fault were analyzed by solving the dynamic equation of the system. Numerical result shows that when the rolling bearing has localized defects, the nonlinear responses of engine system has a obvious change, the velocity and displacement fluctuate strengtheningly, and the fault can be diagnosed by detecting the abnormal response of the system.
出处
《内燃机与配件》
2017年第7期87-89,共3页
Internal Combustion Engine & Parts
关键词
滚动轴承-转子系统
内燃机
缺陷故障
动力学响应
rolling bearing-rotor system
internal-combustion engine
defect fault
dynamic response
