蒙西1号机组在临界转速下高中压转子振动接近保护值,在稳定工况下高中压转子和低压转子振动接近报警值。诊断高中压转子振动故障为一、二阶质量不平衡;低压转子振动故障为晃度严重超标及存在少量的二阶质量不平衡。通过实施现场高速动平衡,将高中压转子临界转速下振动及稳定工况下机组轴系振动降低至优良水平。 Mengxi Unit 1 at critical speed of high and medium pressure rotor vibration close to the protection value, under steady conditions, high and medium pressure rotor and low pressure rotor vibration close to the alarm value. Diagnosis of high and medium voltage rotor vibration fault is one, the second-order mass imbalance; low-voltage rotor vibration fault is a serious overshoot and there is a small amount of second-order mass imbalance. Through the implementation of on-site high-speed dynamic balancing, the vibration of the high-medium-pressure rotor under the critical speed and the vibration of the shaft under the steady working condition are reduced to the fine level.