Working principle of double roller granulator and the reason of excessive torque of main motor
The work of the double roller granulator mainly includes two parts: one is extrusion, the other is granulation.
Extrusion: the dry material is in the shape of cake under the double roll extrusion of the roll extrusion granulator. At this time, the density of the material is very high and the space between molecules is very small. Dry materials in the late storage of finished products, not easy to enter the air for moisture. In this process, the principle of intermolecular force in physics is also used to combine the extruded molecules into molecules with appropriate space density.
Granulation: crushing the pressed cake like material into many small particles by double roller granulator to achieve the purpose of granulation.
Analysis of the causes of the excessive torque of the main motor of the roller ferilzier granulation machine: oil lubrication system failure, poor alignment between the output shaft of the main motor of the extrusion granulator and the input and output shaft of the gearbox, and the vibration of the motor and clutch will damage the bearing of the main motor, resulting in high torque. In addition, excessive feeding load or poor melting of materials will also lead to excessive torque of main motor.
Solution: regularly check and clean the lubricating oil system of the double roller granulator, measure the main motor bearing with vibration measuring instrument and infrared thermometer, and form a trend chart. If the trend value is exceeded, determine whether the no-load current value or power value of the main motor exceeds the specified value, and determine whether the bearing should be replaced. Regularly check the alignment between the output shaft of the main motor and the input shaft of the gearbox. After three months of operation, check the alignment of the bearings. Conduct electrical test and inspection to determine the cause of rotor imbalance; organic fertilizer granulation machine. test the vibration speed of clutch, and adjust the dynamic balance when it exceeds the specified value. Regularly check the heating and cooling system of the cylinder to ensure that the material is evenly heated and fully melted. If the power curve and melt pressure curve of the main motor increase instantaneously when the extruder is started, it means that the feed quantity of the feeding system is too large, and the feed rate should be reduced.
