水力式升船机泄水阀门掺气减蚀措施

Air entrainment measures to alleviate cavitation of hydro-floating ship lift valves

针对某水力式升船机调试阶段出现的输水阀门空化和振动问题,通过比尺为1∶10.667的阀门段常压及减压恒定流水力学物理模型,对水力式升船机高水头泄水阀门流量系数、阀后空化形态及特性进行了研究,在此基础上提出掺气减免泄水阀门段空化的工程措施。通过减压试验验证每只阀门掺气量0.1 m^3/s后,阀门段空化噪声基本消除、振动下降明显,掺气措施减免和抑制空化效果显著。

To solve the problems of plunger valve cavitation and vibration of hydraulic ship lift,with a modelscaled1l10.667physical,the flow coefficient,cavitation morphology,critical cavitation number of the high waterhead plunger valve are researched.For alleviating cavitation,air entrainment measures are put forward.The valvedecompression model test verifies that:the valve segment cavitation is basically eliminated and vibration is declinedobviously when each valve is entrained air with a mount of0.1m3/s.The effect of air entrainment measures toalleviate cavitation is significant.