Direct Answer: The HSM hydraulic roller crusher features an automatic retreat protection system (tramp iron overload protection) powered by hydraulic cylinders, accumulators, pressure sensors, and a central hydraulic station. It automatically yields when uncrushable iron or metal objects enter the crushing chamber and resets instantly without manual shutdown.
⚙️ Step-by-Step Operational Sequence
| Operating Stage | System Action & Hydraulic State | Result & Benefit |
|---|---|---|
| 1. Normal Operation | Hydraulic cylinders maintain stable preset pressure. Accumulator stores energy via compressed nitrogen gas. | Movable roller stays at the fixed gap to produce consistent aggregate sizing. |
| 2. Tramp Iron Entry | Uncrushable metal causes crushing resistance and oil pressure to surge. Sensors trigger rapid hydraulic fluid displacement. | Movable roller retreats instantly, widening the roll gap so foreign objects pass safely. |
| 3. Automatic Reset | Once the object falls through, crushing load drops to normal. Nitrogen in the accumulator pushes fluid back into cylinders. | Movable roller automatically returns to initial position; continuous production resumes. |
Hydraulic System of a Hydraulic Double-Roll Crusher
💡 Key Advantages & Maintenance Tips
- Comprehensive Component Protection: Safeguards expensive roller shells, main shafts, bearings, and reducers from severe impact damage caused by uncrushable metals.
- Zero-Downtime Auto Reset: Unlike traditional spring-type crushers that have limited retreat stroke and easily jam, the hydraulic system resets automatically in seconds without manual intervention.
- Maintenance Recommendation: Periodically check accumulator nitrogen pressure and hydraulic oil cleanliness to maintain instantaneous response sensitivity.
hydraulic power station, pressure sensors, and nitrogen accumulator tanks on an HSM hydraulic roller crushe
Summary: The HSM hydraulic overload protection system ensures safe, uninterrupted production, eliminates tramp iron jamming risks, and extends the overall service life of heavy-duty roller crushers.
+86-13838144666
+86-13838144666
