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一台50M W新机试运时,第一次启动振动状况良好,除了2号轴承振动30μm,其他轴承振动均小于10μm,第二次启动做完电气试验后并网带负荷,出现2号轴承振动超标,通过试验分析,诊断出机组振动原因是汽轮机转子中心孔进油所致。文章分析了这种故障导致振动的机理、途径以及故障的诊断方法。
A 50M W new machine commissioning, the first start vibration good condition, in addition to 2 bearing vibration 30μm, other bearing vibration are less than 10μm, after the second start to finish the electrical test and the load with the grid, there No. 2 bearing Vibration exceeded, through the test analysis, the diagnosis of the unit vibration is due to the turbine rotor center hole into the oil. The article analyzes the mechanism of vibration caused by this fault, the way and fault diagnosis method.