Location:Ball screws convert power through rolling friction between balls and screws, achieving ±0.01mm repeat positioning accuracy and over 90% transmission efficiency. In mining machinery, key applications include:
Drill Rig Positioning Systems: Closed-loop control achieves ±0.05mm drill bit positioning, reducing energy consumption by 40% compared to hydraulic systems.
Belt Tensioning Devices: Preloaded ball screws achieve ±2%FS tension control accuracy, preventing belt slippage or rupture.
Mineral Processing Elevators: Corrosion-resistant coated screws (pH 3-11) exceed 8,000 hours lifespan.
Technical Breakthroughs & Selection Criteria
Material Innovation: Manganese brass cages (Cu57%-60%, Mn1.5%-2.5%) triple impact resistance for vibrating mining environments.
Sealing Design: Multi-lip dust barriers block particles >50μm, extending MTBF to 12,000 hours.
Maintenance Protocols: Lithium grease replenishment every 500 hours; axial gap monitoring (alert threshold >0.1mm).
Industry Trends
With smart mine development, force-sensor-integrated intelligent ball screws are emerging. China's mining ball screw market reached ¥2.76 billion in 2024 (CAGR 12.4%), trending toward modularization and condition monitoring.
