Abstract：Violent vibration with component broken appeared in the scuttles of a thermal-electric power station. By the help of the industrial accident record and on-spot inspection, transient response induced by some kind of impaction was initially deduced to be the cause of this vibration. Using FEM, transient dynamic analysis as well as static analysis was carried out to study this scuttle system. Result shows the scuttle vibrates and breaks in the same way with the actual ones, which reveals that the initial deduction is reliable. Result also indicates this broken is caused by the stiffness asymmetry in the braced frame. Based on this, it was inferred that the vibration was excited by the impulsion to the scuttle of the falling coal which is previously jammed and now collapsing. Many factors of coal jamming were analyzed, including the structure features, reduction of area, coal humidity and friction factor. Two treatments, high polymer material hyperbolic inner lining and anti-drop device, were finally presented in order to reduce the impaction and vibration
蒋向华 张 辉 . 某大型火电厂煤斗振动故障研究[J]. , 2009, 28(1): 186-190.
JIANG Xianghua ZHANG Hui. VIBRATION ANALYSIS AND TREATMENT FOR THE SCUTTLES OF A THERMO-ELECTRIC POWER STATION. , 2009, 28(1): 186-190.
2009, Vol. 28 
