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建立了双转子动力学模型,引入中介轴承刚度和高、低压转子陀螺力矩的影响,利用数值分析和实验验证,揭示了同转/对转双转子系统临界转速特性和不平衡响应存在的差异,以及转速比对同转/对转双转子临界转速特性和不平衡响应的影响.结果表明:陀螺力矩是影响带有中介支承的双转子系统转子刚度的主要原因,其刚度变化与内、外转子的转速比大小和相对旋转方向有关,进而导致同转/对转双转子系统临界转速特性和不平衡响应发生改变;相比同结构的同转双转子,在相同的不平衡量作用下,对转双转子的不平衡响应更为显著.对转双转子进行动平衡时,应更加严格的控制内、外转子的不平衡量.
The dynamic model of double rotor was established. The influence of intermediate bearing stiffness and gyroscopic moment of high and low voltage rotor was introduced. By numerical analysis and experimental verification, the difference of critical speed and unbalance response between two systems was revealed. And the effect of speed ratio on the critical speed and unbalance response of the twin-rotor system were analyzed.The results show that the gyroscopic moment is the main factor that affects the rotor stiffness of the dual-rotor system with intermediate support, Is larger than the size and the relative rotation direction, which leads to the change of the critical speed characteristics and unbalance response of the twin-rotor system. Compared with the same structure dual-rotor, under the same unbalance, Dual-rotor imbalance response is more significant.For the dual-rotor dynamic balance, should be more stringent control of internal and external rotor imbalance.