基于API617的双级盘式TRT转子优化设计

Rotor Optimal Design of TRT Based on API617 Standard

为了提高高炉煤气余压回收透平发电装置的能量回收率和运转效率,根据API617标准,设计了15种盘式双级可调静叶TRT转子-轴承系统,并且采用数值模拟的方法详细分析、计算了这15种方案的临界转速、动力响应及转子不平衡的稳态响应等重要的转子动力特性。研究结果表明:轴承跨距的增大有利于提高转子的临界转速;单纯增加轴的直径只能增加轴刚性支承下的临界转速,转子-轴承系统有阻尼的临界转速反而降低;通过合理分布转子的质量可以成功实现双级悬臂TRT的开发设计。此项研究可为进一步提高国内TRT转子设计水平提供经验依据。

XIAO Yun-fengI, ZHANG Zhi-lian1, TANG Tao2 , LUE Tao1 （1. Beijing Institute of Petrotechemical Technology, School of Mechanical Engineering, Beijing 102617,China; 2. ChenFa Energy Co., Ltd., Chengdu 60116？, China） In order to improve the energy recovery efficiency of the blast furnace gas＇ waste recovery turbine unit, the 15 TRT rotor and bearing systems with disc type＇ s two grade adjustable vane are designed based on API617 standard and their mechanical structures, critical speed, unbalance response and dynamic stability properties are analyzed and calculated by using numerical simulation method. The results show that the span enlarging between two bearings can improve rotor＇s critical speed. However, the rotor diameter increasing can only improve critical speed under rotor rigid support and on the contrary, the damped critical speed of bearing-rotor system may be reduced. Through proper distribution of the rotor＇ s mass, a double grade TRT can be successfully developed. In the end, the experiences for domestic TRT design can be provided for reference.