Effects of Bearing Supporting Stiffness on Dynamic Stability of Turbopump Rotor System in Liquid Rocket Engine

Journal of Propulsion Technology ›› 2013, Vol. 34 ›› Issue (2): 254-262.

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Effects of Bearing Supporting Stiffness on Dynamic Stability of Turbopump Rotor System in Liquid Rocket Engine

Beijing Aerospace Propulsion Institute, Beijing 100076, China;Beijing Aerospace Propulsion Institute, Beijing 100076, China;School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Published:2021-08-15

轴承支承总刚度对液体火箭发动机涡轮泵转子系统稳定性影响研究

窦唯¹,褚宝鑫¹,刘占生²

北京航天动力研究所,北京 100076;北京航天动力研究所,北京 100076;哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨 150001

作者简介:窦唯(1977—),男,博士,高级工程师,研究领域为转子动力学及故障诊断。E-mail:dwdqpi@126.com

Abstract

Abstract: The dynamic stability research about bearing supporting stiffness was carried out for the turbine pump nonlinear rotor system of low temperature liquid rocket engine. The nonlinear rotor system dynamic model was established. The effects of supporting stiffness change of the bearing near the pump and the bearing near the turbine were researched on the stability of the rotor system under condition of installation eccentricity and no-installation eccentricity. The effects of bearing supporting stiffness were analyzed on instability speed. This study provides method for optimum design and fault diagnosis and safe operation of the turbine pump rotor in liquid rocket engine.

Key words: Liquid rocket engine; Turbo-pump;Rotor system;Supporting stiffness;Stability

摘要： 针对低温液体火箭发动机涡轮泵转子非线性系统开展了轴承支承总刚度对稳定性的影响研究。建立了涡轮泵转子非线性系统的动力学模型,分别研究了没有安装偏心和存在安装偏心条件下泵端和涡轮端轴承支承总刚度变化对转子系统稳定性的影响,给出了失稳转速随支承刚度的变化规律。研究表明:泵端轴承支承总刚度对稳定性影响较大,涡轮端轴承支承总刚度对轴系的稳定性影响较小。

关键词: 液体火箭发动机;涡轮泵;转子系统;支承总刚度;稳定性

DOU Wei¹, CHU Bao-xin¹, LIU Zhan-sheng². Effects of Bearing Supporting Stiffness on Dynamic Stability of Turbopump Rotor System in Liquid Rocket Engine[J]. Journal of Propulsion Technology, 2013, 34(2): 254-262.

窦唯,褚宝鑫,刘占生. 轴承支承总刚度对液体火箭发动机涡轮泵转子系统稳定性影响研究[J]. 推进技术, 2013, 34(2): 254-262.

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Effects of Bearing Supporting Stiffness on Dynamic Stability of Turbopump Rotor System in Liquid Rocket Engine

轴承支承总刚度对液体火箭发动机涡轮泵转子系统稳定性影响研究

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