Converter Dust Fan Status Monitoring And Fault Diagnosis Technology

The blower fan is the main facility of steel Group.It can be sorted to centrifugal fan,axial flow fan and mixed flow fan according to the flow direction of medium in the fan.The centrifugal fan is the most one applying in iron and steel plant.The impeller was filled with medium during the fan start works,the medium will rotate with the speller,thus,centrifugal force was produced. The medium will flow to outlet in the acting of centrifugal force,so the vacuum appears in the inlet. Under vacuum and the action of atmospheric pressure,the medium will flow to inlet of speller continuous,then to outlet with the centrifugal force.The fault of rotating machinery is complex in rion and steeel plant.Because of diversity ,non-stationary signal, multi-faults,uncertainly between symptom andfault,fault do not correspond to the symptom exactly.With the complicity of the fault,It is effective to combine professional knowledge and experience in practical fault diagnosis.The application problem in vibration diagnosis analyzed in this paper based on the vibration and diagnosis theory.With case analysis,It concluds the diagnosis technique of local unbalance,coupling damage,pedestal looseness.The variety of vibration is an important fault symptom.Vibration variety,for example,sudden accelerate,increase and then decrease,indicate that fault is growing,examine or regularly monitor is obligatory.Vibration acceleration is a important parameter in rolling bear diagnosis,in despite of the international standard is based on velocity.Besides the first main blower fan,there are many other function fan in the iron and steel plant.The power unit will lower the velocity if something was wrong with the fans,or even stopping unit will be occurred.The safety in production of iron and steel plant was affected.The features of fan relating with it's working behavior are vibration, noise ,temperature, type of particle in the lubrication oil and torque etc,every parameter can reflect the working station from vary point of view,however,the testing method and the field condition are limited to pick-up and analysis the features.The vibration signal is the best one relatively that include rich information about the fan working condition, vibration and failure type could be concluded from the vibration phase and spectral graph.The vibration mechanism,vibration character and solving method of fan's failure,such as non-balance, bearing loose ,mal-alignment etc.,have been analyzed and concluded in this paper.Some failure examples which tested,diagnosed and deal with by the writer was listed,it is showed that vibration analysis has played important role in rising the efficiency ,lowing the fan failure, and safety production of the iron and steel plant.