Identification and Processing of Fan Blade Cracks based on Vibration Fault Characteristics
During the operation of a boiler induced draft fan in a certain power plant,there was a significant abnormal vibration jump.Through comparison with historical data and spectrum analysis,blade failure cracks were accurately identified.After the fan was shut down,the inspection results were completely consistent with the diagnosis,effectively avoiding a major equipment accident.After replacing the fan impeller,the equipment vibration reached an excellent level through on-site high-speed dynamic balancing.In order to analyze the cause of blade cracking,blade frequency and vibration tests were conducted,and it was found that there were obvious blade passing frequency speeds within the working speed range.To ensure the safe and stable operation of the unit equipment,the fan operating curve was optimized,and the use of static blades combined with speed adjustment effectively avoided the resonance speed of the induced draft fan operation.
万方数据
维普
