High Sensitivity Vibration Acceleration Sensor

High sensitivity vibration acceleration sensor, building a strong safety barrier for pumped storage power stations

In pumped storage power stations, the tailwater gate is like a “throat”, bearing the continuous impact of hydraulic vibration sources. Whether the unit power generation, pumping steady state operation, or load dumping transient process, pressure pulsation and mechanical vibration intertwined superposition, threatening the gate structure safety. How to realize the accurate capture and depth analysis of vibration signals? How to quickly locate the root cause of failure?

Scene Enabling

After a pumped storage power plant in Zhejiang Province is put into commercial operation, the steady state power generation or steady state pumping condition of the unit, and the transition process condition of the unit's startup or shutdown are the normal operating conditions of the unit. According to the actual operation of the storage power plant unit, in order to obtain the correlation between the tailgate vibration and the top cover vibration, it is proposed to arrange the measurement points at the tailgate cover plate, tailgate panel and pump turbine top cover at the same time.

Unit power generation and pumping steady state operation, load dumping process, the tailgate structure by the flow channel hydraulic vibration source (mainly pressure pulsation), so the indicators are time-varying dynamic parameter, the test adopts the electrical measurement method, the arrangement of dynamic displacement sensors and acceleration sensors.

Electrometry is mainly used to measure the dynamic response of the structure through various sensors, the dynamic response (such as dynamic displacement and acceleration) are generally physical quantities, the function of the sensors on the one hand, these physical quantities are converted into electricity, and on the other hand, the parameters of the dynamic displacement or acceleration converted into electricity are amplified through amplifiers, and then the electricity reflecting the response of the structure is inputted into the acquisition system, and analyzed and processed by a variety of powerful software functions. Processing the above electric quantities, and finally reduced to the physical quantities of the structure.

Product Introduction

With the advantages of high sensitivity, good low-frequency response and low background noise, the A25G acceleration sensor is suitable for low-frequency vibration testing occasions such as building vibration monitoring, seismic testing, dams, bridge structural testing, ground and foundation vibration monitoring, and geologic tectonics research.

Keywords: pumped storage power station, vibration acceleration sensor, tailgate monitoring, pressure pulsation, vibration acquisition, fault diagnosis

Applicable fields: hydropower engineering, nuclear power cooling system, large pumping station, ocean energy power generation equipment

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