Analysis And Diagnostic Method Research On Thermal-caused Bending Of Rotor Fault Of Turbo-generator Units

Thermal-bending fault is one of the common fault in the operation of turbine generator units. It will arouse the turbine generator units of vibration raising and inducing the units can't operate or run. Seriously it will make the rotor to form abidingly bend, and even cause the units completely destroyed. Therefore, how to quickly and accurately diagnose thermal-bending fault, and prevent the thermal-bending fault deterioration, and eliminate fault and reduce economic losses. This will be the focal point of the fault diagnosis. Based on a large number of the thermal-bending fault cases, the paper deeply investigates the thermal-bending fault of turbine generator units. According to the thermal-bending fault of different position and the fault occurred during period, we classsify of thermal-bending fault. In accordance with the different classification we detailedly summarize the reason of the fault. In the fault mechanism research aspects, analysis the thermal-bending vibration fault mechnism in the different stages, and find out the run-impact vibration fault characteristic in the every stages. In the thermal-bending fault monitoring aspects, forward detailed monitoring paramenters and monitoring methods, and summarizes the vibration figures reflect the thermal-bending fault characteristics. In the deal with thermal-bending fault aspects, sort the different operation stages thermal-bending fault and different fault reason aroused thermal-bending of the treatment measures. This will bring very useful reference value for to manage rub-impact fault of the turbine generator units. In the thermal-bending fault diagnosis aspects, summarizes the fault symptoms and fault reason for to establish the FMEA and the FTA of the thermal-bending fault, and combine the FMEA and the FTA to establish the thermal-bending fault diagnosis flowchart. The fault diagnosis rule for the turbine-generator units rotor thermal bending are acquired based on the rough sets.In the last using the diagnosis and treatment methods proposed in this paper to deal with the vibration fault of turbine and generator units, and accurately diagnose and solve the turbine-generator units,verifies the diagnostic methods proposed in the paper having feasibility for practical application.