【摘要】 通过搭建转子-联轴器-轴承-隔振器系统实验台来模拟舰船主汽轮齿轮机组及其隔振系统,并通过轴承标高调节装置和不平衡质量来模拟实际机组运行过程中的不对中故障,分别研究了静、动态不对中和低频锁定故障的特征,并给出了解决途径。实验研究结果表明,对于含有隔振器的转子-联轴器-轴承系统,静态不对中和不平衡力等引起的动态不对中都会激起2倍频振动;在转速达到隔振系统的固有频率以后,系统有两个主要的振动频率:基频和被锁定的低频,说明系统出现结构不稳定性,发生概周期分岔,锁频故障会严重威胁转子系统的安全稳定运行。研究结果可以为舰船主汽轮齿轮机组及其隔振系统的不对中和锁频故障诊断以及稳定性理论分析提供实践依据。更多还原

【Abstract】 Experiment rig of rotor-coupling-bearing-isolator system was installed to simulate marine steam turbine geared unit and its isolation system,the bearing elevation adjustor and unbalance mass were used to model the misalignment trouble of this unit,the characteristics of static and dynamic misalignment trouble and low frequency -locking trouble were studied,and the solutions to those troubles were also provided.Experiment research results show,for rotor-coupling- bearing system with isolators,both the static misalignment and unbalance force due to dynamic misalignment will lead 2X basic frequency.When the basic frequency arrives to the natural frequency of isolator system,two main frequencies appear,basic frequency and locked low frequency,and the structure of this system becomes unstable,which causes quasi-periodic bifurcation.Frequency-locking trouble would threaten safe and stable operation of rotor system seriously.The above research results will provide practical basis for misalignment and frequency-locking trouble and stable theoretical analysis of marine steam turbine geared unit and its isolation system.更多还原