Design and Feasibility Evaluation of Vibration Reduction of Electric Actuator of Nuclear Power Valve
The vibration of the valve actuator of nuclear power unit is high,which has led to the falling off of the capacitance and resistance of the circuit board for many times.This seriously affects the reliability of the equipment.Through numerical simulation and experimental testing analysis,the vibration cause found is that the excitation load generated by the front pump is transmitted to the valve through the pipe-line,and the natural frequency of the valve is close to the blade frequency of the front pump,which results in resonance.According to the cause of vibration,structure form and site space,a-vibration reduction design is carried out for the valve:dynamic vibration absorbers are added at both ends of the valve elec-tric actuator to suppress valve vibration.Finally,the vibration reduction scheme is measured and evalua-ted.The results show that the proportion of the vibration reduction of the valve is over 80％,which pro-vides a reference for the follow-up vibration treatment.
electric actuator of valvecause of vibrationvibration reduction designfeasibility assessment
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