Screw conveyors are designed for moving and distributing bulk material. Some common types of screw conveyors include horizontal/inclined shafted screw conveyors (the most common type of screw conveyor used for bulk material handling), shaftless screw conveyors (typically used with sticky, high moisture and viscous loads), screw feeders and live bottom conveyors (used to move various types of loads at a constant and controlled speed and usually incorporate more than one gearbox) and vertical screw conveyors (used to move dry or semi-fluid loads at very steep inclines).
An important part of screw conveyor design is the selection and protection of the driving gearbox. It’s important that small pieces and debris from the material being moved are kept out of the reducer. Contamination of the gear lubrication and bearings can result in drive failure.
Traditional sealing methods for screw conveyor applications include conventional seals, string packing glands, compression seals and expensive air pressure seals.
NORD Gearboxes for Screw Conveyor Applications
The NORD Screw Conveyor Package (SCP) offers a compact and cost effective alternative to traditional screw conveyor drives. NORD’s uniquely designed sealing system is integrated into our CEMA mounting flange and shaft assembly to effectively protect against debris and contamination. The six point sealing system includes:
- Dual Viton lip seals
- Grease impregnated packing seal
- Dual gap seals (excludes particles) — 0.03” gap
- Material evacuation ports
- Shaft material ditch
- Quadrilip™ sealing
Closely stepped speed reduction ratios combined with a directly coupled gearmotor or NEMA C-face input design eliminates the need for top motor mounts, pulleys or guards. Minimizing parts and eliminating the belted input system provides easier system maintenance, increased reliability and superior drive performance.
NORD offers right-angle helical bevel and CLINCHERTM parallel shaft screw conveyor drives.
Compact and Cost Effective Screw Conveyor Drives From NORD
NORD DRIVESYSTEMS is a manufacturer of gearmotors, electric motors, speed reducers and AC vector drives that companies around the world rely on every day. Our Screw Conveyor Package is designed and custom optimized for the application needs of each individual customer.
Connect with a NORD DRIVEYSTEMS representative today to find a NORD screw conveyor package that is perfectly optimized and configured for your needs.
Institute for Materials Flow and Logistics: www.fml.mw.tum.de/fml/images/Publikationen/DesignAndSizingOfScrewFeeders.pdf