航天推进技术研究院主办
[1]杨宝锋,金路,许开富,等.考虑密封耦合效应的涡轮泵转子动力学特性[J].火箭推进,2022,48(03):16-24.
YANG Baofeng,JIN Lu,XU Kaifu,et al.Analysis on rotor dynamic of a turbopump considering seal coupling effect[J].Journal of Rocket Propulsion,2022,48(03):16-24.
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YANG Baofeng,JIN Lu,XU Kaifu,et al.Analysis on rotor dynamic of a turbopump considering seal coupling effect[J].Journal of Rocket Propulsion,2022,48(03):16-24.
考虑密封耦合效应的涡轮泵转子动力学特性
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
48
期数:
2022年03期
页码:
16-24
栏目:
研究与设计
出版日期:
2022-06-22
- Title:
- Analysis on rotor dynamic of a turbopump considering seal coupling effect
- 文章编号:
- 1672-9374(2022)03-0016-09
- 分类号:
- V434.21
- 文献标志码:
- A
- 摘要:
- 液体火箭发动机涡轮泵中,环形小间隙密封引入的刚度、阻尼系数会随转子运行转速发生变化,体现为弱耦合效应,进而对转子系统的动力学特性产生影响。为获得密封耦合效应对涡轮泵转子系统动力学特性的影响,基于有限单元法及矩阵运算方法推导了转子—密封耦合系统动力学方程,提出了考虑密封动力学系数随涡轮泵运行工况变化的耦合计算方法,获得了密封耦合效应对转子系统临界转速以及不平衡响应的影响。结果表明:考虑密封后,转子系统前两阶临界转速显著增大,其中二阶转速增大幅度更为显著 随着涡轮端支承刚度的增加,密封对一阶转速的影响增强,一阶转速增大幅度由8.13增加到37.42 密封阻尼的引入使得转子系统各关键部件不平衡响应显著降低,降低幅度达到50以上。
- Abstract:
- In the turbopump of a liquid rocket engine, the stiffness coefficient and the damping coefficient introduced by the annular seal with small gap vary with the rotating speed of the rotor, showing as the weak coupling effect, and then it has further impacts on dynamic characteristics of the rotor system.To obtain the influence of the seal coupling effects on the rotordynamic characteristics of turbopump, the dynamic equations of the rotor-seal system were derived based on the finite element method and the matrix operation method.A coupling solving method considering the variation of seal dynamic coefficient with the operating conditions of turbopump was proposed, and the influence of the seal coupling effect on the critical speed and unbalance response of the rotor system was achieved.The results show that the first-order and the second-order critical speeds of the rotor system increase obviously when considering the seal effects, and the second-order critical speed increases more significantly.With the increase of the support stiffness of the turbine end, the effect of seal on the first-order critical speed is enhanced, and the variation amplitude increases from 8.13 to 37.42.The unbalanced response of the key components in turbopump rotor system dramatically reduces due to the introduction of seal damping, and the reduction can be more than 50.
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备注/Memo
收稿日期:2021-09-03 修回日期:2021-10-24
基金项目:国家重点基础研究发展计划(613321)
作者简介:杨宝锋(1989—),男,博士,工程师,研究领域为液体火箭发动机涡轮泵技术。
更新日期/Last Update:
1900-01-01