Research Of Vibration And Noise Monitoring System In Turbine

With the increasing demand for electricity, more and more high-capacity turbine generators apply to use in our country. As large rotating machinery, vibration is inevitable in turbine generators. In recent years, especially with the more and more unit capacity and more and more complex of the unit structure, the factors attribute to vibration failure are also increasing. In running of power plants, the state of turbine generator unit is directly related to the safety of power plant operation and economic benefit. Therefore, the turbine generator vibration monitoring and fault diagnosis is a important problem that power plants are facing with. This paper proposes a new Turbine-line monitoring system through investigation. The system not only uses vibration parameters as fault monitoring data, but also introduces the noise parameters to aiding fault diagnosis, achieving good results.Through the industry-university-institute cooperation with plant, it develops an on-line monitoring system for turbo-generator of integrating vibration and noise parameters, using2supercritical steam turbine generators of600MW in plant as the research object. The host monitoring system is made up by three major components, which are the vibration sensor, noise sensor and DSP data acquisition system. The sensors using the eddy current sensors, the magnetic speed sensors and the pre-polarized microphone to collect signals; DSP data acquisition system uses TMS320LF2407as the core processing chip for signal acquisition, AID conversion and SCI communication with the host computer; the host computer compiles the fault monitoring system using Lab VIEW software platform; the communication between the host and the guest in SCI system uses RS-485bus.Failure by the unit can be observed in real time online monitoring interface unit run various parts of the curve shaft vibration, bearing vibration and noise, to facilitate the operational status of the unit be mastered.The alarm monitoring system and logic control section can be very timely handling units abnormal vibration and noise, thus ensuring crew safety and efficient operation.In this paper, the development of steam turbine generator set vibration and noise monitoring system has been successfully completed industrial experiments.Experiments show that the system can be stable and efficient vibration and noise data acquisition unit, and a data storage unit to complete each measurement point, the analysis and diagnosis, to achieve the desired effect.Can be directly applied supercritical turbine power plant monitoring and fault diagnosis of steam turbine generator set long-term safety and effective operation plays an important role.