Working principle of double roller crusher

A double-roll crusher (double-toothed roll crusher) applies extrusion, shearing, and tearing forces to materials through two counter-rotating wear-resistant toothed rolls to achieve crushing. The core principle is as follows:

Crushing Process: After entering the crushing chamber, the material is "bitten" by the rotating toothed rolls and drawn between them. The material is then crushed into the desired particle size through the extrusion, shearing, and tearing actions of the rolls.

Key Forces:

Extrusion Force: The pressure generated by the counter-rotating rolls directly crushes the material.

Shearing Force: The toothed roll design enhances the shearing effect, making it particularly suitable for processing tough materials (such as coal gangue).

Tearing Force: The special toothed shape of the rolls tears along the cleavage plane of the material, reducing over-crushing.

Structure and Control:

Adjustment Device: The roller spacing is adjusted via shims or a worm gear mechanism to control the finished particle size.

Safety Device: Springs buffer impacts from non-crushable materials to protect the equipment.

Applicable Scenarios: High-hardness or tough materials such as metallic silicon and coal gangue. The principle of lamination crushing reduces over-grinding and increases the yield of intermediate particle sizes.