同轴式微速差双转子系统整机动平衡方法研究

同轴式微速差双转子系统的不平衡振动信号是由内、外转子各自不平衡振动叠加而成的拍振，通过研究拍振波形的特征，提出不通过解拍，有效分离内、外转子各自不平衡振动响应的方法；通过理论分析和试验研究发现内、外转子不平衡振动之间的相互影响很小，提出用8影响系数法实现该类转子动平衡的方法。通过对双转子系统进行外转子单独平衡和内、外转子同时平衡的成功实践，证明8影响系数法能在保证足够高的平衡精度下，快速、高效地解决同轴式微速差双转子系统的动平衡问题,具有十分重要的工程应用价值。

STUDY ON WHOLE MACHINE BALANCING METHOD FOR COAXIAL DUAL-ROTOR SYSTEM WITH LITTLE ROTATING SPEED DIFFERENCE

Unbalanced vibration signal of coaxial dual-rotor system with little rotating speed difference is a composite signal called "beat", which is composed of uneven vibration of internal and external rotor. Through studying the characteristic of beat, a method of separating two rotors' unbalanced weight from beat is put forward. The effect between two rotors' unbalanced vibrations is very weak .which is proved by experiments and theoretic calculation. Eight effect coefficient method is brought out to deal with whole machine balancing for dual-rotors systems with little rotating speed difference. Balancing experiments successfully are made in two ways, balancing outer rotor singly and balancing two rotors simultaneously. Practice prove that eight effect coefficient method can get high balancing precision, simplify the balancing of this rotors system and has great application prospect.