300P15离心泵振动故障诊断及对策

Fault diagnosis of the vibration of a 300P15 centrifuge pump and the countermeasures

对化肥厂的关键设备尿素水解给料泵的振动进行了监测，运用密封间隙动力失稳理论对泵的振动进行了分析，诊断出泵的异常振动是因间隙设计不当而产生流体激振，导致共振的。根据诊断结果调整了轴与密封的间隙，使泵的振动值降至允许范围内。

The vibration monitoring of a feed pump for urea hydrolysis was made, and a vibration analysis of the pump was made by using the dynamic Loss-in-stabiliy theory in the seal clearance. It shows that the resonance was caused by the hydro-excited vibration for the failure of the seal clearance design. The clearance between the axis and the seal was adjusted based on the diagnosis result, and the vibration value of the pump was lowered to an allowable range.