大型汽轮机转子的发展中裂纹对刚度的影响

Effect on the Stiffness of a Large Turbine Rotor with Developing Crack

本文考虑了大型汽轮机转子在高转速时,裂纹转子系统存在裂纹生长的情况,研究了陀螺效应对于大型汽轮机转子发展中裂纹的刚度的影响,并针对发展中的裂纹,建立了相应裂纹转子系统的三维陀螺力矩模型和三维刚度模型。进一步研究了质量偏心距、质量偏心角和陀螺力矩对裂纹转子的刚度的影响,得到了裂纹转子系统在三维陀螺力矩、质量偏心和偏心角耦合作用下的高转速转子在裂纹发展的情况下的刚度变化规律。

In this paper, the crack growth in the cracked rotor system of a large turbine rotor at high speed is considered, and this paper studies the influence of the gyro effect on the stiffness of a large steam turbine rotor with crack growth. For the developing cracks, the three-dimensional gyroscopic moment model and three-dimensional stiffness model of the corresponding cracked rotor system are formed. The coupling effects of mass eccentricity, unbalance angle and gyro moment on the stiffness of the heavy-duty rotor with damage evolution are studied respectively. The stiffness variation law of the high-speed rotor with three different types of cracks under the coupling of three- dimensional gyro moment, mass eccentricity and unbalance angle are obtained.