Research on Online Monitoring Technology of Cavitation in Hydraulic Machinery
Based on the occurrence mechanisation of cavitation,this paper develops an online monitoring technology to determine the occurrence of cavitation in hydraulic machinery and judge the severity of cavitation by analyzing the change of time-frequency characteristics of cavitation noise radiated by hydraulic machinery during cavitation.This technology has been applied in many power stations including bulb turbine,Kaplan turbine,Francis turbine and pump-turbine.It has the characteristics of convenient installation,safety and reliability,and can be applied in the fields of optimal operation of hydraulic machinery and smart unit construction.
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