支承总刚度对涡轮泵转子临界转速及稳定性的影响  

Effect of bearing supporting stiffness on dynamic stability and critical speed of turbopump rotor system

作　　者：窦唯[1] 褚宝鑫[1] 

机构地区：[1]北京航天动力研究所,北京100076

出　　处：《火箭推进》2014年第1期30-38,共9页Journal of Rocket Propulsion

基　　金：中国航天科技集团公司支撑项目(2011JY01)

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支承总刚度对临界转速及系统稳定性的影响研究。建立了涡轮泵转子非线性系统的动力学模型,在有安装偏心条件下分别研究了泵端和涡轮端支承总刚度变化对转子系统临界转速和稳定性的影响,给出了失稳转速随支承总刚度的变化规律,为液体火箭发动机涡轮泵转子系统结构设计、诊断与维护提供理论依据。The influence of the bearing supporting stiffness on dynamic stability and critical speed of turbopump nonlinear rotor system of low temperature liquid rocket engine is researched in this pa- per. The dynamic model of turbopump nonlinear rotor system was established. The effect of suppor- ting stiffness change of the bearing near the pump and the bearing near the turbine on the stability and critical speed of the rotor system is respectively researched under the condition of installation decen- tration. The rule of variation of instability rotate speed with bearing supporting stiffness is given. A theoretical foundation for structural design, fault diagnosis and safe operation of the turbopump rotor system in liquid rocket engine is provided.

关 键 词：液体火箭发动机涡轮泵 转子系统 支承刚度 临界转速 动态稳定性 

分 类 号：V434-34[航空宇航科学与技术—航空宇航推进理论与工程]