Multi-segmented ring gears

Moventas is specialized in the design and manufacture of large diameter segmented ring gears used to rotate large drums, kilns and mills. The multi-segmented ring gear concept is originally developed by Moventas. With more than three decades of experience in large multi-segmented spur ring gears, we offer also helical design where preferred. Moventas employs application-based design techniques to ensure that each ring gear is engineered to provide the optimum drive solution for both new installations and replacements. We design and deliver a complete package, including auxiliary drives, main reducers/gearboxes and bedplates. Our multi-segmented ring gears are machined to exacting tolerances, up to AGMA10 or ISO7 for certain applications. Full life-cycle support is augmented by a comprehensive range of services with a strong focus on condition management and proactive maintenance.

Customer benefits:

• High precision with heavy-duty reliability
Multiple design enables higher precision machining with more accurate tooth geometry for diameters of 3 meters and up, no upper limit exists

• Improved logistics
10 to 20 segments, up to 1,200 mm long, bolted together to make immensely strong and precise large diameter gears
→ Significant reduction in lead-times
→ Easy transportation
→ Fast and easy installation

• Lower life-cycle costs
Minimized gear wear by using Austempered Ductile Iron (ADI) material
→ High strength to weight ratio together with high resistance to fatigue
→ Highly accurate production and assembly techniques minimize vibration
→ Fast replacement as individual segments are easy to  be replaced
→ Condition monitoring enables performance monitoring either in real-time or as a part of regular inspections