Asynchronous Shaft Kinematics: 160,000 Nm Torque vs Reinforced Concrete
Evaluation of asynchronous paddle shafts in reinforced concrete. Telemetry confirms higher fracture efficiency than synchronous shearing.
Evaluation of asynchronous paddle shafts in reinforced concrete. Telemetry confirms higher fracture efficiency than synchronous shearing.
Evaluation of asynchronous paddle shafts in reinforced concrete. Telemetry confirms higher fracture efficiency than synchronous shearing.
Landfill fee €25/t, fuel consumption 0.27 l/t, and wear factor 0.85 are locked into the shift model.
Evaluation of asynchronous paddle shafts in reinforced concrete. Telemetry confirms higher fracture efficiency than synchronous shearing.
tensile fracturetensile fractureTensile fracture: a material failure mode where the shredder shafts pull and tear the feed material apart, dominant at high RPM and low specific loads., cutting regimecutting regimeCutting regime: the operating mode where the shaft blades slice through feed material with a shearing action, preferred for clean fraction output., TCOTCOTotal Cost of Ownership: the comprehensive lifetime cost including purchase price, fuel, wear parts, maintenance, and residual value depreciation., OPEXOPEXOperational Expenditure: recurring costs of running the shredder — fuel or electricity, wear part replacement, scheduled servicing, and operator wages. — wear cassettewear cassetteWear cassette: a modular, replaceable cutting insert set mounted on the shredder shaft. Quick-swap design minimises downtime during maintenance., twin-shafttwin-shaftTwin-shaft design: two counter-rotating shafts equipped with interchangeable cutting cassettes that work in concert to shred industrial waste.
Traditional synchronous shredders attempt to slice through material. When applied to highly abrasive silicates and reinforced concrete, this destroys the metallurgical integrity of the blades. Arjes subverts this by utilizing an asynchronous drive system with Bonfiglioli planetary gearboxes, running independent shafts between 11 and 35 RPM and sustaining a 160,000 Nm torque capacity.
Instead of cutting, the shafts grip the aggregate and subject it to multi-directional tensile forces. Since concrete has high compressive but low tensile strength, it shatters along its internal fault lines. This "crushing" principle preserves the hard-faced tool edges and drastically reduces the kinetic energy required per ton.
SCU threshold locked at $P_{spike}=345$ bar. Auto-reverse safety margin: 5%. The Bonfiglioli drive train is calibrated to trigger kinetic reversal before reaching the shear stress limit of the paddle shafts. When unshreddable rebar bridges the chamber, the Shredder Control Unit (SCU) detects the hydraulic spike before exceeding the 160k Nm threshold. The automated reverse sequence instantly ejects the contaminant, allowing the over-belt magnet to isolate clean ferrous material without stalling the primary drive train.