2026/04/14
The spiral blades are the core operational components of a double screws compost turning machine. By appropriately adjusting the blade angles, clearances, and mounting configurations, the machine can be adapted to handle fermentable materials with varying moisture levels and textures. This prevents issues such as material clogging, entanglement, and uneven turning, thereby ensuring the stable and reliable operation of the fermentation process.
The blade pitch angle is the primary parameter for adjustment. The machine's blades feature a bolted mounting structure; thus, the angle can be adjusted simply by shutting down the equipment and loosening the fastening bolts. When processing high-moisture, viscous, and heavy materials—such as manure or sludge—the blade pitch angle should be increased to enhance material pushing and lifting capabilities, thereby minimizing the accumulation of sticky residue at the bottom of the pile. Conversely, when handling dry, loose materials—such as straw or humus—the pitch angle should be slightly reduced to broaden the material scattering range and improve both aeration and heat dissipation within the pile.
Secondly, the staggered clearance between the blades on the two spiral shafts must be adjusted; the opposing spiral blades must remain parallel to each other to prevent frictional contact or collision. When the material is severely caked or clumped, the clearance between the blades should be narrowed to intensify the crushing and shearing effects. Conversely, when processing fibrous materials prone to entanglement, the clearance can be slightly widened to mitigate operational faults caused by material jamming or wrapping around the shafts.
Furthermore, adjustments should be integrated with routine maintenance and wear inspections. After prolonged use, the blades are susceptible to wear and deformation, which can result in diminished turning efficiency. Operational efficiency can be restored through reinforcement via patch welding or by replacing the worn blades. Additionally, the blade fastening bolts should be regularly tightened during daily maintenance to prevent loosening or misalignment during operation.
Finally, blade adjustments must be synchronized with the equipment's travel speed and the rotational speed of the spirals. Slower speeds are recommended when processing soft, wet materials, while speeds can be appropriately increased for dry materials. When combined with hydraulic controls for adjusting the turning depth, this approach ensures uniform vertical mixing of the material, thereby enhancing the overall quality of the composting process and extending the service life of the bio-organic fertilizer production line.
