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涡轮泵是液体火箭发动机的重要组成部份。Turbopump is an important part in liquid rocket engine.

发动机与供应系统的交界是在涡轮泵的进口法兰盘处。The engine-feed system interface is at the turbopump inlet flanges.

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涡轮泵由过氧化氢分解产生的气体驱动。The drive for the turbopump units was actuated using hydrogen peroxide.

这给涡轮泵的设计带来了很大的困难。This has brought a lot of difficulties for the design of the turbopump.

计算分析了某涡轮泵转子在弹性支承下的临界转速。The critical speed of one turbopump rotor on elastic support was computed by FEMQZ.

在此基础上，提出并验证了基于转子固有频率的涡轮泵故障检测方法。Finally, the turbopump fault detection approach was validated by LRE historical test data.

涡轮泵是液体火箭发动机的重要组成部分，主要担负燃料的输送任务。The turbopump is an important part of the liquid rocket engine, whose task is fuel transporting.

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论述了某型号液体火箭发动机涡轮泵高压低温静密封检漏试验用真空室密封结构的设计问题。Vacuum vessel seal structure used in the leak test of a liquid rocket engine turbopump is discussed.

因此涡轮泵实时状态监控系统的研制受到了广泛重视。Hence the research of real time health monitoring system of turbopump is being paid a wide attention.

转子动力学问题是液体火箭发动机研制中最复杂的问题之一。Rotor dynamic is one of the most complicated problems in development of LOX turbopump of liquid rocket engine.

对涡轮泵轴系运转时的跳动量及稳定性对产品可靠性的影响进行了研究。The effect of the pulsation and stability of a running turbopump shafting on system reliability is investigated.

驱动涡轮泵系统的气压来自使用主推进剂的燃气发生器。To drive the turbopump unit, gas pressure was derived from a generator that used the main propellant components.

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并针对液氧涡轮泵动静压轴承提出了研究需要解决的关键技术。At the end of this paper, some key technologies about oxygen hybrid bearing application in the engine turbopump are proposed.

研究了液体火箭发动机涡轮泵转子系统发生干摩擦时的故障状态。In this paper, the fault status induced by rubbing between rotor and stator of liquid rocket engine turbopump system is analyzed.

作为组合支承，金属橡胶阻尼器有它独特的优点，应用在氢涡轮泵转子上，其减振效果很明显。Theoretical and experimental investigation of hydro- turbopump rotor system showed that MR has special advantages as a combined bearing.

针对液体火箭发动机涡轮泵特殊工作环境，讨论了流体动静压轴承可采用的结构形式和需要解决的关键技术。This paper mainly discusses available structures of the liquid hybrid bearings and the key technologies that need to be solved for the liquid rocket engine turbopump.

据此，为涡轮泵故障检测选择了线性相关性弱，故障特徵反映能力强的3路振动参数和3种统计特徵量。So, 3 vibration parameters and 3 statistical features, which are weak linear correlation and well reflect the faults characteristic, are selected for the LRE turbopump fault detection.

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实验结果表明，计算得到的一阶临界转速与实测值吻合，所发展程序能用于涡轮泵转子的动力特性分析。The results show that the computed results of first order critical speed agree well with the experimental results. The program FEMQZ can be used to dynamic analysis of turbopump rotor.

结果表明，基于转子的一阶、二阶和三阶临界转速以及轴向固有频率幅值能有效地检测涡轮泵的故障。The results show that the turbopump faults can be detected effectively by using the amplitudes of rotor first, second and third order critical frequency as well as axial intrinsic frequency.

研究表明，涡轮泵不对称以及发动机与机架之间连接刚度弱是引起推力偏心和基频固有频率偏低的主要原因。It is shown that the offset of propulsion force and the lower natural fundamental frequency are caused by asymmetry of turbopump and weakness of connection stiffness between propulsion and frame.