基于Romax的高速齿轮转子临界转速的计算与分析

高速齿轮转子应用广泛,其动态特性影响着齿轮箱的运转稳定性和可靠性。通过Romax软件,对两种振动异常的高速齿轮转子进行动态分析,得到了两种转子的各阶固有频率,以及轴承支撑参数对各阶固有频率的影响。发现改进前两高速齿轮转子的运行转速接近1阶临界转速,同时在Romax中对轴系结构进行改进,使其工作转速远离临界转速;改进后试验表明,两转子各振动指标正常,齿轮箱运转良好;为高速齿轮转子的临界转速计算提供了一种精确有效的方法。

Calculation and Analysis of Critical Speed of High-speed Gear Rotor based on Romax

The high speed gear rotor is widely used, and its dynamic property affects the stability and reliability of gearbox. The dynamic analysis of two kinds of high-speed gear rotor with abnormal vibration are proceeded by Romax software, the each nature freque ncy of two rotors and the in fluence of the beari ng supporting parameter on each nature frequency are obtained. It is found that the running speed of first two high speed gear rotor before improvement is approached to the first order critical speed. At the same time, the shaft system structure is improved in the Romax to make sure the running speed faraway from critical speed. The improved test result indicates that the each vibration index is normal, and the running condition of gearbox is pretty well. A method for accurate calculating the critical speed of high-speed gear rotor is provided.