...压转子；4号轴承；不稳定振动 [gap=1025]Key words：300MW turbine units；LP rotor；No．4 rotor—bearing；unstable vibration ...
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通过对某机组运行中发生的不稳定振动进行分析，结合现场数据，诊断出了振动故障。
The vibration malfunction was diagnosed through the analysis of unstable vibration in the operation of a unit and the field data.
流体运动的不稳定性造成压力冲击，引起管道与设备振动。
Unsteady flowing has pressure lash, it can cause the quake of pipe and equipment.
高温、高压、高压差的蒸汽调节阀中的流动不稳定导致异常的振动，造成阀门的磨损及阀杆破坏以及流动中的压损。
The unsteady flow in the high pressure steam valve cause unusual vibration, the valve pole to be destroyed, the pressure while flowing to be lost, etc.
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