摘要
反向旋转的双转子系统已被相当一部分航空发动机采用,以利于减小高、低压转子陀螺力矩的影响,降低机匣负荷,提高飞机机动性能。本文分析了一种中介联接方式较特殊的反向旋转双转子结构,即其中介轴承外圈与低压转子联接,内圈与高压转子联接。针对这种结构,本文应用传递矩阵法,结合边界条件,提出了一种较为简便的改进方法,分析了反向旋转双转子结构前3阶临界转速特性和振型特点,研究了支承刚度对结构的前3阶临界转速的影响。此外,本文对不同支承刚度下双转子结构的1阶临界转速进行了试验研究,并与计算值进行了对比,吻合较好。
The counter-rotating dual-rotor system is applied in some kinds of aeroengines. That dual-rotor system can decrease the influence of the gyroscopic moments created by high pressure rotor and low pressure rotor, reduce the torque of cases, and improve the flexibility of airplanes. An especial counter-rotating dual-rotor structure is analyzed, in which the low pressure rotor is mounted on the inter-shaft bearing＇ s outer ring and the high pressure rotor is mounted on the inter-shaft bearing＇ s inner ring. By using transfer matrix method and corresponding boundary conditions, a relative simple calculating method is given to study the dual-rotor above. Using this method, the first 3 critical speeds and mode shapes are analyzed, and the influences of supporter＇ s rigidity to the first 3 critical speeds are studied, Furthermore, the experiments on the first critical speeds under different supporter＇ s rigidities are accomplished, and the comparison results between the experimental data and calculating data are given.
出处
《现代机械》
2007年第4期45-49,共5页
Modern Machinery
关键词
双转子
反向旋转
动力学特性
dual-rotor
counter-rotating
dynamic characteristic
