Integrated Modeling and Application of High-speed Turbopump Rotor System
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摘要: 针对高速涡轮泵转子系统多摩擦学元件耦合的特点,建立了计入密封装置、推力轴承、轴向平衡装置等多摩擦学元件耦合时复杂转子系统的集成动力学模型。对某液氢高速涡轮泵转子动力学性能的数值仿真研究结果表明:计入端面密封、推力轴承及平衡盘等的力矩刚度影响,系统1阶临界转速提高25%,失稳转速提高50%,为高速涡轮泵转子系统的稳定性提高措施的选择和论证提供了新思路。为进一步提高转子系统的稳定性,在轴承中引入了超导可倾瓦块,并对引入该附件后转子系统动力学集成建模方法进行了初步探讨。Abstract: Based on the characteristics of high-speed turbopump system,taking into account of the seals,thrust bearing,axial balancing device and other tribological components,we conducted the integrated modeling including the rotor,the thrust bearings and other components. Numerical simulations for the performance of a liquid hydrogen high-speed turbopump rotor dynamics were performed and the results showed that when taking into account the torque stiffness of the seal,thrust bearings,balance disc and superconducting tilting pad,the first critical speed of the system was increased by 25%,instability speed was increased by 50%,thus,it provides a new idea for high-speed turbopump rotor to improving the stability of the rotor system. To further enhance the stability of the rotor system,we introduced the superconducting tilting pad in the bearing and discussed the integrated modeling method for the rotor system with this attachment.
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Key words:
- thrust bearings /
- tribology /
- calculations /
- finite element method /
- mathematical models
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