Diagnosis and Treatment of Oil Film Whirl Fault in the Bearing of Large Synchronous Condenser

Abstract

The oil film vortex of a synchronous condenser rotor can cause an increase in bearing vibration. When the vibration amplitude exceeds the threshold value, it can cause the condenser to trip. The oil film vortex is related to many factors and often occurs during the start-up and acceleration process of the unit, as well as during the loading process of the unit. This article elaborates on the low-frequency oscillation accident of the bearing system caused by the oil film vortex fault of the rotor of a large synchronous condenser and its handling methods. This article presents a sudden low-frequency vibration of a large synchronous condenser. Based on the data collected on site and experimental test results, this condenser analyzes and diagnoses the low-frequency vibration incident, and ultimately determines it as an oil film vortex fault in the bearing system. The article combines the operation and maintenance plan of the synchronous condenser and conducts on-site dynamic balance tests on the synchronous condenser. After the dynamic balance test, the low-frequency vibration of the bearing system disappears and the fault is eliminated.