【摘要】 小修调整对轮中心后发电机组振幅随着有功负荷的提升而增大,处于严重超标水平。通过对现场进行的变励磁电流、冷却风温、负荷试验以及外特性试验结果进行诊断,排除了找中诱发振动故障的可能性,判断发电机转子存在热不平衡故障。采取对发电机转子实施现场热平衡的方法,将定速、负荷工况下发电机振动控制在优良水平范围以内。更多还原

【Abstract】 Vibration amplitude in turbine generator rotor under load condition exceeded alarm level after coupling re-alignment. Excited current, cooling hydrogen temperature, electric load and bearing cap outside characteristics tests had been achieved in field. Test results revealed that the root cause of vibration malfunction is the thermal sensitivity in turbine-generator. Vibration amplitude in turbine generator rotor had been successfully reduced to satisfied level by compromise balance method.更多还原