Problem of stirring vibration at the kettle top
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An agitator is installed on the top of the reaction tank, and weighing modules are placed under the four supports of the tank. When the agitator operates at full speed, some of them may vibrate, and this can cause the entire equipment to shake as well. What are the specific reasons for this?
Issues related to the mixing system: Loose or eccentric mixing blades: Prolonged operation can cause the fixing screws to loosen, leading to eccentric operation and shaking. Unbalanced blades or foreign objects attached to them: Clumping, corrosion, or adhesion of materials lead to an uneven mass distribution, resulting in an imbalance in centrifugal force. Bearing wear or insufficient lubrication: Wear of the bearings that support the mixing shaft, along with excessive clearance, leads to axial movement or radial runout. Axis misalignment: The deviation in coaxiality between the mixing shaft and the output shaft of the motor/gearbox, which exacerbates vibrations at high speeds
Equipment installation and structural issues: Loose bearings or foot bolts: Even with a weighing module, vibrations can still be transmitted if the bearings are not securely fixed. Improper installation of the weighing modules: If the four weighing modules are not level or are subjected to uneven forces, it may lead to additional constraints or tilting, affecting stability. Insufficient base stiffness: The overall support structure of the reactor lacks rigidity, resulting in resonance under high-frequency stirring. Operating parameters and load issues: When the rotation speed is close to the natural frequency, operation at full frequency may pass through the system’s resonance point, causing severe vibration. Abnormal conditions of the material inside the tank: such as caking, stratification, or excessively high/low liquid levels, which result in uneven mixing forces.