• 17 Nov, 2022
• By EPIC Powder
• 2 Comments

How to adjust the speed of the grading wheel and the motor current of the air flow pulverizer EPIC Powder Machinery

In the existing air flow pulverizer technology, the classification wheel is generally used to separate the powder that reaches the crushing particle size. Since the classification wheel is set in the pulverizer barrel, and the barrel is full of high-pressure gas, the sealing between the main shaft of the classification wheel and the outside has always been a difficult problem to solve. In general, the dynamic seal ring and static seal ring are used between the main shaft of the grading wheel and the bearing support seat of the air flow mill to achieve the effect of both sealing and rotating the main shaft. However, due to the high gas pressure in the barrel of the crusher, many powders will enter the lower bearing along the gap between the dynamic and static seals under the action of pressure, resulting in the bearing being blocked and unable to work, and the spindle can no longer rotate

The material moves to the classification area with the updraft under the action of the fan pumping force. Under the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated. The fine particles that meet the particle size requirements enter the cyclone separator and dust remover for collection through the grading wheel, and the coarse particles drop to the crushing area for further crushing. The motor drives the grading wheel to rotate at high speed in the grading housing (the speed can be adjusted at will), forming a strong centrifugal force in the classifier. The air powder mixture entering the classifier first enters the inner part of the classification wheel. Under the centrifugal force, large or heavy particles are directly pinned by the centrifugal force of the classification wheel, so they are thrown to the periphery of the classification wheel to the side wall of the classifier, and are no longer affected by the centrifugal force. They naturally fall into the main crusher to continue crushing or fall to the outlet for collection; Small or light materials are subject to small centrifugal force and hover inside the grading wheel. Affected by the induced wind of the induced draft fan, they are carried to a high place and move along the pipeline to the next component for grading or collection. The centrifugal force in the classifier can be adjusted by adjusting the speed of the grading wheel through frequency conversion, so as to achieve the purpose of separating materials with specified particle size. Adjustment of the speed of the grading wheel of the air flow mill: increase the speed of the grading wheel to improve the product fineness when other parameters remain unchanged; On the contrary, the product fineness increases. The grading wheel has accurate particle size cutting points. According to the different requirements of the required product particle size, the speed of the classifier can be selected within a certain range. Working current adjustment of grading wheel motor of air flow crusher: the motor current of grading wheel changes with the amount of materials in the chamber of the classifier (assuming other conditions remain unchanged). There are many materials in the cavity, the current is large, the classification efficiency is low, and the output is increased; On the contrary, the efficiency increases and the output decreases