柔性转子-挤压油膜阻尼器系统中非协调涡动轨道的实验研究

本文以实验为基础分析了在柔性转子——挤压油膜阻尼器系统中出现非协调涡动轨道的可能性及规律性;研究了系统参数(如油膜的径向间隙比、承载长度、不平衡量及定心弹簧刚度等)对非协调涡动轨道的影响以及非协调涡动轨道与转子振动之间的关系。

NONSYNCHRONOUS ORBITS IN A FLEXIBLE ROTOR-SQUEEZE FILM DAMPER SYSTEM

The possibility and the regularity of occurrence of nonsynchronous orbits ard investigatedbased on experiments of a Jeffcott rotor-squeeze film damper(SFD) with/without a centralizingspring system. The influences of system parameters,such as radial clearance ratio, load length,unbalance and centralizing spring stiffness,on nonsynchronous orbits and the relationbetween nonsynchronous orbits and rotor vibration are studied. It is found that the centralizing spring is a very effective means to suppress the nonsynchronous ordit.The unbalanceof the rotor is a main cause for occurrence of the nonsynchronous orbits. 1/2 subsyn-chronous orbit can be observed no matter whether the bearing parameter is quite small or very large provided the unbalance of the rotor is large enough. In some cases,the subsynchronous orbits with many inter loops can be obtained. Analytical and experimental results are found in good agreement.