Composition and main functions of flour mill rollers

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The flour mill grinding rolls are mainly composed of the following parts:

1.The grinding roll shaft mainly bears the rotating load of the grinding roll. It is generally made of high-quality alloy steel, requiring sufficient strength and fatigue resistance.
2.The grinding roll sleeve connects the two ends of the grinding roll to the shaft. It is made of high strength alloy steel, with a certain hardness and fits tightly with the shaft.
3.Grinding roll liner is the annular part lining the inside of the grinding roll, made of alloy materials with good wear resistance, as the actual area for crushing flour.
4.Grinding roll bolts fix the grinding roll to the shaft. They are made of high strength materials to prevent loosening and falling off.
5.Seals are set at both ends of the grinding rolls to prevent flour loss and dust removal. Wear-resistant seal materials are used.
6.The transmission section transfers power from the main shaft to the grinding rolls, using gears or belt drives, etc.
7.Support bearings support both ends of the grinding roll shaft, using heavy duty rolling bearings or slide bearings to ensure smooth rotation.
8.The frame system is the support structure bearing the overall weight of the grinding rolls, welded from steel structures with sufficient rigidity.
The working area, rotational speed, gap, etc. of the grinding rolls directly affect the flour milling effect and need careful design and manufacturing.

The main functions of flour mill grinding rolls are:

Crushing action
The grinding rolls crush the grains between them and break them into flour. The roll surface is deliberately patterned to enhance the crushing and shearing effect.

Agitating action
The high-speed rotation of the grinding rolls generates a fluidizing effect, making the grain particles flow rapidly between the rolls, fully contacting the rolls for uniform grinding.

Conveying action
The centrifugal force and squeezing force between the grinding rolls convey the grains through the roll gap for continuous feeding.

Sifting action
By adjusting the roll gap, fine flour and coarse particles can be separated for coarse and fine grinding effects.

Heating effect
The high-speed rotation of the rolls generates heat, which can dry the flour, but overheating needs to be controlled.

Dust removal effect
The air flow generated by the high-speed rolling removes dust impurities in the flour.

Power supply effect
Some rolls have abrasive wheels on the surface to supply electricity and generate electric sparks to polish the flour.
Proper grinding roll design and use are crucial for improving flour milling efficiency and quality.

Post time: Aug-24-2023