Heavy-Duty Tensioner Pulley for Rock Drill Jumbos This tensioner pulley is engineered to maintain optimal belt tension in rock drill jumbo drive systems, ensuring reliable power transmission in harsh mining environments. Its robust design minimizes belt slippage, reduces maintenance downtime, and extends the service life of drive components .
Technical Specifications & Design
Core Performance Traits:
Automatic Tension Maintenance: The spring-loaded mechanism maintains a consistent 500N tension across a 10mm stroke, compensating for belt stretch and thermal expansion during operation. This prevents both over-tensioning (which causes premature belt failure) and under-tensioning (which leads to slippage and energy loss) .
Durable Construction: Ductile iron (GGG50) provides high impact resistance (20J at -20°C), while the 0.5mm chrome plating enhances wear resistance in abrasive conditions. The double-sealed ball bearing prevents ingress of dust and moisture, a critical feature in mining environments .
Temperature Resilience: Operates reliably from -40°C (cold underground mines) to +120°C (high-friction drive systems), with no degradation in bearing performance or tension force .
Performance Advantages
Extended Component Life:
Reduces belt replacement frequency by 30% compared to fixed-tension pulleys, thanks to consistent tension control .
Low radial runout (0.02mm) ensures smooth rotation, minimizing vibration and noise in the drive system.
Environmental Adaptability:
Resistant to mineral oils, coolants, and road salts commonly encountered in mining operations.
72-hour salt spray resistance (ASTM B117) ensures suitability for damp or humid environments .
Applications
Rock Drill Jumbos: Used in drill arm drive systems, hydraulic pump belts, and conveyor drives.
Mining Equipment: Compatible with loaders, excavators, and tunneling machines requiring belt tension management.
Industrial Machinery: Suitable for heavy-duty conveyors, crushers, and material handling systems.
