The double roll crusher is a compact, efficient crushing device widely used in mining, cement, and aggregate processing. It’s favored for uniform product size, low over-crushing rate, and good adaptability to sticky materials. Below is a simplified breakdown of its working principle.
Core Components
Key parts ensuring stable operation:
Crushing Rollers: Core parts (smooth/toothed) made of wear-resistant materials.
Drive Device: Motors + reducers/gears, driving rollers to rotate oppositely.
Adjustment Device: Wedge/gasket/hydraulic type, controlling discharge size via roller gap (1-50mm).
Overload Protection: Spring/hydraulic cylinders, protecting equipment from unbreakable foreign objects.
Feeding & Discharging Devices: Ensure uniform feeding and smooth material transfer.
Simplified Working Process
The crusher works based on “extrusion + shearing”, with 4 key steps:
1. Material Feeding
Bulk materials (coal, limestone, etc.) are evenly fed into the gap between the two rollers (crushing chamber).
2. Roller Crushing
Driven by the transmission system, the two rollers (one fixed, one movable) rotate oppositely. Materials are crushed by extrusion (and shearing for toothed rolls) to break along internal weak structures.
3. Overload Protection
If foreign objects enter, the protection device retracts the movable roller to discharge them, then resets automatically.
4. Controlled Discharging
Crushed materials meeting size requirements are discharged. Adjust the roller gap via the adjustment device for different product sizes.
Key Advantages
Uniform product size, suitable for fine crushing.
Good adaptability to sticky materials (≤10% moisture), no clogging.
Energy-saving & efficient, lower consumption than hammer crushers.
Compact structure, easy maintenance, long service cycle.
Application & Daily Tips
Applications: Mining (coal, ore), cement (limestone, clinker), chemicals (soda ash), and construction waste recycling.
Daily Tips: Check roll wear regularly; keep feeding uniform; lubricate transmission parts periodically.
In short, the double roll crusher achieves stable crushing via simple “extrusion + shearing” and coordinated components, making it essential in the crushing field. Leave comments for further questions!
