Causes of Excessive Vibration in Kaolin Dryers (Part II)

III. Wear and failure of critical components

Prolonged high-load operation leads to the failure of core components, creating a vicious cycle of "wear—vibration—accelerated wear." Wear on the support rollers and tires is a contributing factor: the surfaces of support rollers are prone to pitting, indentation, or thinning due to prolonged contact; uneven wear or surface cracking on the tires increases the meshing clearance between the two components, resulting in impact and vibration during operation; furthermore, if lubrication fails and leads to dry friction, the rate of wear accelerates significantly. Next, faults in drive system components play a role: gear wear, spalling, or excessive meshing clearance increases impact forces during power transmission; the aging or failure of rubber buffer elements in elastic couplings prevents the dampening of transmission vibrations; and wear or excessive clearance in support bearing shells causes radial shifting of the cylinder during rotation, triggering severe vibration. Additionally, the failure of minor components—such as detached lifter plates or loose cylinder fastening bolts—can disrupt the cylinder's dynamic balance and induce vibration.

IV. Abnormal Thermal Operating Parameters

Drastic fluctuations in parameters such as furnace temperature and air pressure can indirectly trigger cylinder vibration. Sudden spikes or drops in furnace temperature cause uneven heating of the cylinder over a short period, leading to localized thermal deformation or even bending, which manifests as periodic vibration during rotation; meanwhile, unbalanced flue resistance or malfunctions in the draft system disrupt internal airflow distribution, affecting the uniform spread of coal slime and causing the cylinder load to fluctuate with the airflow, thereby indirectly intensifying vibration.