1. 西安交通大学动力工程多相流国家重点实验室,西安,710049
2. 西安交通大学能源与动力工程学院,西安,710049
网络首发:2010-09-10,
纸质出版:2010
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陈双涛 1, 侯予 1, 2, 等. 高速透平膨胀机临界转速的计算与分析[J]. 西安交通大学学报, 2010,44(9):33-37+58.
Calculation and Analysis of Critical Speed of High-Speed Turbo-Expanders[J]. 2010, 44(9): 33-37+58.
为了保障高速透平膨胀机的稳定性
针对高速透平膨胀机转子临界转速的确定问题
分别讨论了Prohl递推法、Riccati传递矩阵法和有限元QZ(FEQZ)法在各向异性的弹性支承轴承转子系统阻尼临界转速计算中的优缺点.考虑到透平膨胀机实际的结构和应用情况
建议气体轴承支承高速透平膨胀机转子临界转速的计算方法采用FEQZ法
同时运用Matlab语言分模块设计了计算程序
大大简化了编程过程
提高了计算精度.在此基础上
通过在实际工况参数范围内的实例
分析了某透平膨胀机转子支承刚度和阻尼对转子系统阻尼临界转速的影响
并与工程实验数据进行了对照
从而验证了模型与分析计算的可靠性.
The advantages and disadvantages of the Prohl method
the Riccati recursive method and the finite element QZ(FEQZ)method in estimating critical speed of turboexpander rotor-bearing systems with anisotropic elastic support were discussed to ensure stable operation of high speed turboexpanders. It is suggested that the FEQZ method be the most effective way when the actual structure and practical application of turboexpanders are considered. The Matlab code was employed to design the program
and the results show that the program process is simplified and the calculation accuracy is higher. In addition
the effects of the support stiffness and the damping coefficient on critical speed of the rotor-bearing system of a turboexpander within actual working condition range were analyzed
and the calculation results were validated by the experimental data.
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