水电机组大轴中心补气阀改造及效果评价方法

Modification and Effect Evaluation Method of Shaft Center Air Compensating Valves of Hydro-generator Unit

分析某水电机组大轴中心补气阀补气时的异常声响原因,提出补气阀换型改造方案,从机组摆度、振动、水压脉动、发电机噪音、补气阀补气量等方面对补气阀改造效果进行了评价。试验结果表明,补气阀改造后,机组稳定性整体上得到改善,发电机异常声响情况消失,补气量得到提高。

By analyzing the cause of the abnormal sound of the hydro-power unit,the reformation scheme of the air supply valve is proposed,and the modification effect of the air supply valve is evaluated from the aspects of the swing,vibration,hydraulic pressure pulsation,generator noise and the air supply volume of the valve of the unit.The test results show that after the modification of the air supply valve,the stability of the unit is improved as a whole,the abnormal sound of the generator disappears,and the air supply volume of the valve is increased.