转子系统不对中问题的研究进展

A REVIEW OF ROTOR SYSTEMS WITH MISALIGNMENT

转子系统的不对中问题在旋转机械中非常普遍,是引起严重整机振动的主要原因之一.特别地,以先进涡扇发动机转子系统为代表的带有弹性支承、内外布置的多转子系统,其动力学特性具有特殊性,不对中的理论问题与工程需求十分突出.本文首先针对两类不对中问题(联轴器不对中和支点不对中),评述了目前不对中建模方法、不对中转子系统的动力学和振动特性方面的代表性研究成果.其次,针对航空发动机转子系统,详细综述了目前已有的套齿联轴器、弹性支承组件的动力学研究成果.在此基础上,作者针对其具体结构特征,进行了航空发动机转子系统不对中成因与模式分类,初步建立了联轴器不对中和支点不对中的转子系统动力学模型并进行了振动特性分析.

Misalignment of rotor system is one of the common faults in rotating machineries,which often leads to serious abnormal vibrations and even causes catastrophic consequences. It stands out that misalignment is one of the important issues for theoretical and engineering demand,especially for aero-engine rotor system with flexible supports,inner and outer multi-rotor,and the particularity of dynamics. Firstly,for misalignments of coupling and supports,the modeling approaches and representative research achievements in dynamics and vibration properties of misaligned rotor system are reviewed in this paper. Secondly,only a few researches on the dynamics of spline coupling and elastic supporting components in aero-engine rotor system are discussed in detail. On this basis,for specific structure characteristics of rotor system for aero-engine,the cause and pattern classification of misalignment are investigated,respectively. In addition,the dynamic models for coupling and support misalignment are established,and the corresponding vibration characteristics are then analyzed.